IEEE/PES Transformers Committeegrouper.ieee.org/groups/transformers/meetings/f... · IEEE/PES Transformers Committee Meeting Fall, 2008 Porto, Portugal October 5 - 9, 2008 Committee

IEEE/PES Transformers

Committee

Fall 2008 Meeting Minutes

Approved

- i -

Table of Contents

0.0 Cover Page & Front Matters

0.1 Table of Contents --------------------------------------------------------------------------------------------- i

0.2 Attendance Roster --------------------------------------------------------------------------------------------1

0.3 IEEE Patent Requirements for Standards Development Meetings -------------------------------6

1.0 Chair’s Report – T. A. Prevost --------------------------------------------------------------------------------8

2.0 Approval of Minutes from Spring, 2008 Meeting--------------------------------------------------------11

3.0 Administrative Subcommittee – Tom A. Prevost -------------------------------------------------------12

3.8 Secretary’s Report – B. Chiu-------------------------------------------------------------------------------15

3.9 Standards Report – B. Bartley -----------------------------------------------------------------------------17

3.10 NEW Business -----------------------------------------------------------------------------------------------17

4.0 Vice Chair’s Report – J. Edward Smith --------------------------------------------------------------------21

5.0 Transformers Standards/Standards Subcommittee --------------------------------------------------26

6.0 Recognition and Awards – Chair: Donald J. Fallon----------------------------------------------------30

7.0 New Business ------------------------------------------------------------------------------------------------------36

8.0 Report of Technical Subcommittees------------------------------------------------------------------------37

8.1 Underground Transformers and Network Protectors-----------------------------------------------37

8.2 Audible Sound And Vibrations---------------------------------------------------------------------------40

8.3 Bushing--------------------------------------------------------------------------------------------------------41

8.4 Dry Type Transformers------------------------------------------------------------------------------------47

8.5 Distribution Transformer ----------------------------------------------------------------------------------51

8.6 Dielectric Test -----------------------------------------------------------------------------------------------59

8.7 HVDC Converter Transformers &Smoothing Reactors--------------------------------------------67

8.8 Instrument Transformers----------------------------------------------------------------------------------70

8.9 Insulating Fluids---------------------------------------------------------------------------------------------73

8.10 Insulation Life ------------------------------------------------------------------------------------------------86

8.11 Performance Characteristics-----------------------------------------------------------------------------100

8.12 Power Transformers ---------------------------------------------------------------------------------------109

9.0 Editor’s Report -----------------------------------------------------------------------------------------------------117

10.0 Meetings Planning ------------------------------------------------------------------------------------------------N/A

11.0 Liaison Report------------------------------------------------------------------------------------------------------120

Standards Coordinating Committee on Electrical Insulation – SCC 04--------------------------------120

Technical Advisory Group for IEC TC 14 ---------------------------------------------------------------------N/A

CIGRE Liaison Report ---------------------------------------------------------------------------------------------121

Appendix

Appendix A – Meeting Schedule --------------------------------------------------------------------------------125

Appendix B – Presentations on O&P Revision --------------------------------------------------------------130

Appendix C – Standards Report --------------------------------------------------------------------------------131

IEEE/PES Transformers Committee Meeting Fall, 2008

Main Committee Meeting October 9, 2008 Porto, Portugal

Attendance Roster

Amos, Richard: CM [Unifin International] Anderson, Gregory: CM [GW Anderson & Associates, Inc.] Antosz, Stephen: CM [Pennsylvania Transformer] Antweiler, Jim: AP [Square D/Schneider Electric] Arteaga, Javier: CM [ABB-Kuhlman] Ayers, Donald: CM [Pacific Crest Transformers] Bae, Yongbae: II [Hyosung] Ballard, Robert: II [ABB Inc.] Beaster, Barry: CM [ABB-Kuhlman] Beauchemin, Claude: II [GE Canada] Beckwith, Thomas: II [Beckwith Electric Co., Inc.] Betancourt, Enrique: AP [Prolec GE] Blaydon, Daniel: II [Baltimore Gas & Electric] Boman, Paul: CM [Hartford Steam Boiler] Breckenridge, Thomas: II [TB TCS Ltd] Calvo Conde, Santiago: II [Incoesa Consultores] Castellanos, Juan: AP [Prolec GE] Cherry, Donald: AP [ABB Inc.] Chiu, Bill: CM [Southern California Edison] Chu, Donald: CM [Consolidated Edison Co. of NY] Claiborne, C. Clair: AP [ABB Inc.] Colopy, Craig: CM [Cooper Power Systems] Cuesto, Miguel: II [Asea Brown Boveri S.A.] Cui, Yuan Zhong: II [TBEA] Damico, Frank: CM [TAMINI Transformers USA] Darwin, Alan: CM [AREVA T&D] Davis, Eric: CM [Burns & McDonnell] Davydov, Valery: AP [Monash University] Dohnal, Dieter: CM [Maschinenfabrik Reinhausen] Dudley, Richard: CM [Trench Limited] Elliott, Fred: CM [Bonneville Power Administration] Fallon, Donald: CM [PSE&G] Fausch, Reto: AP [Hubbell High Voltage Test] Foldi, Joseph: CM - LM [Foldi & Associates, Inc.] Fortin, Marcel: CM [Hydro-Quebec Distribution] Franchek, Michael: CM [Weidmann Electrical Technology] Gamboa, José: II [Siemens S.A.] Ganser, Robert: CM [Transformer Consulting Services] Garcia, Eduardo: CM [Siemens] Gasser, Hans Peter: II [Weidmann Electrical Technology AG] Girgis, Ramsis: CM [ABB Inc.] Gomez-Hennig, Eduardo: AP [Siemens S.A.]

Graham, James: AP [Alliant Energy] Graham, Richard: CM [Delta Star Inc.] Griesacker, Bill: CM [Doble Engineering Company] Hammer, Mark: II [AREVA T&D] Hanique, Ernst: CM [KEMA N.V.] Hanus, Kenneth: CM [Oncor Electric Delivery] Harley, John: CM [FirstPower Group LLC] Hayes, Roger: CM [Siemens Canada] Heathcote, Martin: II [Martin Heathcote Associates Ltd] Henning, William: CM [Waukesha Electric Systems] Hochanh, Thang: CM [Hydro-Quebec IREQ] Hopkinson, Philip: CM [HVOLT Inc.] Jarman, Paul: AP [National Grid] Johnson, Charles: CM [ABB Inc.] Johnson, Wayne: AP [EPRI] Juhlin, Lars-Erik: CM [ABB Power Systems] Kadar, Laszlo: II [Hatch] Kelly, Joseph: CM - LM [S.D. Myers, Inc.] Kennedy, Sheldon: CM [Niagara Transformer] Khalin, Vladimir: CM [ABB-Kuhlman] Klaponski, Brian: CM [Carte International Inc.] Kraetge, Alexander: AP [OMICRON] Kropp, Hans-Walter: II [ABB AG - Transformers] Lemke, Eberhard: AP [LDIC] Linan, Roberto: II [Instituto de Investigaciones Electricas] Lopez Fernandez, Xose: II [Universidade de Vigo] Lundquist, Thomas: CM [Lundquist Consulting Services, Inc.] Machado Junior, Tamyres: AP [Siemens Ltda] MacMillan, Donald: CM [Hunterdon Transformer] Marek, Richard: CM [DuPont] Marlow, Dennis: CM [TBEA] Martin, Russell: II [M&I Materials] Matthews, John: CM [Baltimore Gas & Electric] McShane, Charles Patrick: CM [Cooper Power Systems] Millward, Paul: CM [ITEC] Molden, Arthur: CM [AMEESCO] Mushill, Paul: AP [Ameren] Neuls, Flavio: II [AREVA T&D] Nicholas, Ron: AP [ABB Inc.] Ocon, Rodrigo: II [Industrias IEM] Ogajanov, Rudolf: AP [ABB-Kuhlman] Oliva, Miguel: AP [ABB]

Porto, Portugal October 5 - 9, 2008

IEEE/PES Transformers Committee Fall, 2008 Meeting Minutes - Approved

Page 1 of 155

Oommen, T.V.: AP [ABB Inc.] Papp, Klaus: CM [Trench Austria GmbH] Perez de Nanclares Leal, Gonzalo: II [Incoesa Consultores] Pinol, Xavier: II [H-J International, Inc.] Platts, Donald: CM [PPL Electric Utilities] Ploetner, Christoph: CM [Siemens AG] Pointner, Klaus: II [Trench Austria GmbH] Poulin, Bertrand: CM [ABB Inc.] Powell, Lewis: II [Pepco] Powell, Paulette: CM [3P] Prevost, Thomas: CM [Weidmann Diagnostic Solutions Inc.] Pries, Patrick: II [HICO America] Puri, Jeewan: CM [Transformer Solutions, Inc.] Reed, Scott: CM [Power Substation Services] Riboud, Jean-Christophe: AP [RTE] Riffon, Pierre: CM [Hydro-Quebec] Robbins, Kirk: II [Exelon Nuclear] Roizman, Oleg: AP [IntellPower Pty Ltd] Sandhu, Surinder: AP [Sanergy Consulting] Sarkar, Subhas: AP [Virginia Transformer Corp] Sauzay, Mathieu: II [JST Transformateurs SA] Scarborough, Mark: II [DuPont]

Schweiger, Ewald: CM [Siemens AG] Shertukde, Hemchandra: CM [University of Hartford] Sim, H. Jin: CM [Waukesha Electric Systems] Smith, Edward: CM [H-J Enterprises, Inc.] Snyder, Steven: CM [ABB-Kuhlman] Som, Sanjib: II [Virginia Transformer Corp] Steineman, Andrew: AP [Delta Star Inc.] Stiegemeier, Craig: CM [ABB Inc.] Tellez, Richard: II [Siemens S.A.] Tello-Guijarro, Jorge: II [Union Fenosa Group (Socoin)] Tenbohlen, Stefan: II [University of Stuttgart] teNyenhuis, Ed: CM [ABB Inc.] Termini, Giuseppe: CM [PECO Energy] Traut, Alan: CM [ABB-Kuhlman] Vailoor, Vasanth: II [Trantech] Verhoeven, Rob: II [SMIT Transformers] Vir, Dharam: AP [Waukesha Electric Systems] Vogel, Herman: AP [GE Energy] Wagenaar, Loren: CM [WagenTrans] Watson, Joe: CM [Hico America] Yule, Kipp: CM [Bechtel Power Corp]

Membership Code

CM – Committee Member CM – LM – Committee Member – IEEE Life Member AP – Active Participant

II – Interested Individual SP – Spouse GT – Guest



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IEEE/PES Transformers Committee Meeting Fall, 2008


Committee Members and Guests Registered for the Fall, 2008 Meeting

Abi-Samra, Nick: II Abi-Samra, Hala: SP Afonso, Nuno: II Allan, Dennis: CM Allan, Glenis: SP Allen, Jerry: II Almada-Lobo, Francisco: II AlMoallem, Said: II Amos, Richard: CM Amos, Norann: SP Anderson, Gregory: CM Aniceto, Francisco: II Antosz, Stephen: CM Antweiler, Jim: AP Armstrong, James: II Aromin, Venzon: AP Arteaga, Javier: CM Arteaga, Ara: SP Asano, Roberto: II Atman, Edward: II Ayers, Donald: CM Bae, Yongbae: II Ballard, Robert: II Baranowski, Derek: AP Baranowski, Diana: SP Barrento, Rui: II Bartley, William: CM Bartley, Dorothy: SP Bates, Lisa: II Beaster, Barry: CM Beaster, Barb: SP Beauchemin, Claude: II Beckwith, Thomas: II Beckwith, Maria Liddora: SP Benson, Richard: AP Benson, Veronica: SP Berler, Zalya: AP Bulgakova, Valentina: SP Bernardoni, Alberto: II Betancourt, Enrique: AP Bidwell, David: II Blackmon, Jr., James: AP

Blackmon, Donna: SP Blaydon, Daniel: II Bolliger, Alain: AP Boman, Paul: CM Bonito, Raul: II Bonmann, Dietrich: II Bourbon, Sandra: II Brady, Ryan: II Breckenridge, Thomas: II Breckenridge, Gabriele: SP Buchanan, Paul: CM Buchanan, Ela: SP Burgos, Juan: II Busse, Frank: II Calvo Conde, Santiago: II Campbell, James: II Campbell, Sandra: SP Cardoso, Bruno: II Carvalho, Carlos: II Carvalho, Tania: II Castellanos, Juan: AP Cherry, Donald: AP Chiu, Bill: CM Lu, Minnie: SP Chu, Donald: CM Claiborne, C. Clair: AP Claiborne, Patricia: SP Colopy, Craig: CM Colopy, Bonnie: SP Corkran, Jerry: CM Corkran, Patricia: SP Costa, Florian: AP Craven, Michael: AP Craven, Susan: SP Crispim, Joao: II Cruz Valdes, Juan Carlos: II Castillo Martinez, Lourdes: SP Cuesto, Miguel: II Cui, Yuan Zhong: II Damico, Frank: CM Damico, Patricia: SP Darby, John: II

Darwin, Alan: CM Darwin, Sue: SP Davila Roque, Jose G.: II Hernandez Nerio, Sanjuana: SP Davis, Eric: CM Davydov, Valery: AP de la Cruz, Dan: AP Degeneff, Robert: CM Degeneff, Maria: SP Del Rio, J. Arturo: AP Dohnal, Dieter: CM Dohnal, Almut: SP Duart, Jean-Claude: II Dudley, Richard: CM Dumas, Beth: II Duval, Michel: II Elliott, Fred: CM Elliott, Frances: SP Ellis, Keith: CM Fallon, Donald: CM Fallon, Suzann: SP Fausch, Reto: AP Fausch, Miluna: SP Feghali, Pierre: CM Fernandes, Tania: II Fernandes, Joao: II Field, Norman: AP Foldi, Joseph: CM - LM Foldi, Rose: SP Forsyth, Bruce: CM Forsyth, Connie: SP Fortin, Marcel: CM Franchek, Michael: CM Fuchs, Artur: II Fuchs, Gabriele: SP Gamboa, José: II Ganser, Robert: CM Ganser, Linda: SP Garcia, Eduardo: AP Olmos, Rosa: SP Gasser, Hans Peter: II Gasser, Franziska: SP



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Girgis, Ramsis: CM Glass, Bryan: AP Gomez-Hennig, Eduardo: AP Goncalves, Tiago: II Gonzalez, Carlos: II Gonzalez de la Vega, Jorge: AP Orozco, Maria Elena: SP Gortazar Rubial, Joaquin: II Graham, Richard: CM Graham, John: CM Graham, James: AP Graham, Josephine: SP Graham, Gillian: SP Kuecker, Susan: SP Griesacker, Bill: CM Ditrich, Denise: SP Grijuela, Jose: II Guardado, Jeremy: CM Guardado, Lesley: SP Guerra, Jorge: AP Guerra, Jorge: II Hachichi, Said: II Hall, A C: CM Hammer, Mark: II Hammer, Thomas: II Hammer, Dawn: SP Hanique, Ernst: CM Hanson, David: AP Hanus, Kenneth: CM Kight, Glenda: SP Harley, John: CM Ernest, Judy: SP Hayes, Roger: CM Hayes, Linda: SP Heathcote, Martin: II Heathcote, Penny: SP Henning, William: CM Herz, Josh: AP Fried, Ruth: SP Hilgers, Marcel: II Stopin, Angelique: SP Hoch, Derek: II Hochanh, Thang: CM Hochanh, Tuyet Le: SP Hoffmann, Holger: II Holsomback, Steve: AP Hopkinson, Philip: CM Hopkinson, Jane: SP Hurley, Catherine: AP Jacomo Ramos, António: II Jacquenet, Nicolas: II

Jakob, Fredi: AP Jakob, Sybil: SP Jarman, Paul: AP Jaroszewski, Marion: AP Jaroszewski, Stasia: SP Jauch, Erwin: AP Jauch, Beverly: SP Johannson, Larry: AP Johannson, Jocelyn: SP Johnson, Wayne: AP Johnson, Charles: CM Juhlin, Lars-Erik: CM Kadar, Laszlo: II Kadar, Edith: SP Kanty, Stephen: II Kanty, Kelly: SP Kelly, Joseph: CM - LM Kelly, Margery: SP Kennedy, Sheldon: CM Kennedy, George: II Kennedy, Nancy: SP Khalin, Vladimir: CM Khalin, Mila: SP Sakovska, Nadiya: GT Klaponski, Brian: CM Klaponski, Lois: SP Ko, Chungduck: AP Ko, Hyosuk: SP Koch, Maik: II Kraetge, Alexander: II Kropp, Hans-Walter: II Kropp, Heidi: SP Krump, Reiner: AP Krump, Helga: SP Kyle, Randall: AP Kyle, Brenda: SP Lamb, Michael: II Lamb, Lori: SP Larsson, Tommy: II Lau, Michael: CM Lau, Nancy: SP Lawson, Matthew: II Lee, Terence: II Legrand, Bertrand: AP Grondin, Suzanne: SP Lemke, Eberhard: AP Lemke, Renate: SP Lima, Sanderson: II Linan, Roberto: II Lopes, Ricardo: II Lopez, Benjamin: II

Rivera, Flora: SP Lopez Fernandez, Xose: II Lundquist, Thomas: CM Luo, Jun: II Machado Junior, Tamyres: AP Machado, Nivia: SP MacMillan, Donald: CM Maia, Mario: II Mamtora, Jitendra: AP Mamtora, Kauna: SP Marek, Richard: CM Marlow, Dennis: CM Martin, Russell: II Martins, Maria Conceicao: II Marx, Robert: II Marx, Joan: SP Matthews, John: CM Matthews, Marian: SP McGovern, Steven: II McNelly, Susan: CM McShane, Charles Patrick: CM McShane, Claudette: SP McTaggart, Ross: CM Melanson, Joseph: CM Millward, Paul: CM Millward, Aileen: SP Milton, Curtis: AP Molden, Arthur: CM Moleski, Hali: II Moore, Harold: CM - LM Moore, Willi: SP Mukerji, Amitav: II Munoz, Marta: II Mushill, Paul: AP Navarro, Martin: AP Neuls, Flavio: II Neuls, Maria Helena: SP Nguyen, Van Nhi: CM Nguyen, Tam: SP Nicholas, Ron: AP Nicholas, Wendy: SP Nordman, Hasse: AP Nordman, Marianne: SP Ocon, Rodrigo: II Ogajanov, Rudolf: AP Kuchmistaya, Victoriya: SP O'Leary, Brian: AP Oliva, Miguel: AP Oommen, T.V.: AP Oommen, Anna: SP Oriti, Samuel: AP



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Oriti, Patricia: SP Ostrander, David: AP Ostrander, Elizabeth: SP Paik, Henry: AP Papp, Klaus: CM Papp, Erna: SP Patel, Sanjay: AP Patel, Rajal: SP Patni, Prem: II Patton, Jesse: CM - LM Patton, Jan: SP Pedro, Pedro: AP Perego, Luca: II Perez de Nanclares Leal, Gonzalo: II Perkins, Mark: CM Pinol, Xavier: II Piovan, Ugo: II Platts, Donald: CM Platts, Margo: SP Pleite, Jorge: II Ploetner, Christoph: CM Ploetner, Bettina: SP Pointner, Klaus: II Pointner, Karin: SP Polishchuk, Izyaslav: II Poulin, Bertrand: CM Chainé, Andrée: SP Powell, Paulette: CM Powell, Lewis: II Prevost, Thomas: CM Prevost, Rosie: SP Pries, Patrick: II Pries, Bea: SP Puetter, Markus: II Puri, Jeewan: CM Puri, Rani: SP Radbrandt, Ulf: AP Rasor, Robert: II Razuvayev, Sergiy: II Razuvayeva, Galyna: SP Recksiedler, Leslie: AP Reed, Scott: CM

Reed, Laura: SP Reitter, George: CM Reitter, Silvia: SP Rensi, Randolph: AP Rooker, Donna: SP Riboud, Jean-Christophe: AP Riffon, Pierre: CM Robbins, Kirk: II Roberts, Mark: II Roizman, Oleg: AP Roussell, Marnie: AP Sampat, Mahesh: CM Sandhu, Surinder: AP Santos, Paulo: II Sarkar, Subhas: AP Sauzay, Mathieu: II Sauzay, Stephanie: SP Scarborough, Mark: II Scarborough, Michelle: SP Schuette, Christoph: AP Schweiger, Ewald: CM Schweiger, Annette: SP Sestito, John: AP Shekelton, James: CM Shekelton, Beverly: SP Shertukde, Hemchandra: CM Shertukde, Rekha: SP Silva, Pedro: II Sim, H. Jin: CM Sim, Julie: SP Sim, David: GT Simoes, Joaquim: II Singhal, Vivek: II Singhal, Abhishek: II Smith, Edward: CM Snyder, Steven: CM Snyder, Darlene: SP Snyder, Patrick: GT Som, Sanjib: II Spoorenberg, Cees: II Stebbins, Randy: II Steineman, Andrew: AP

Stenestam, Bengt-Olof: AP Stiegemeier, Craig: CM Stopin, Angelique: II Swinderman, Craig: CM Swinderman, Cheryl: SP Szewczyk, Radoslaw: II Tellez, Richard: II Tello-Guijarro, Jorge: II Tenbohlen, Stefan: II teNyenhuis, Ed: CM Termini, Giuseppe: CM Termini, Gina: SP Thompson, Robert: CM Traut, Alan: CM Traut, Teresa: SP Tuli, Subhash: CM Tuli, Rita: SP Vailoor, Vasanth: II Valdemar, Julio: II Verhoeven, Rob: II Viereck, Dr. Karsten: II Vir, Dharam: AP Vogel, Herman: AP Wagenaar, Loren: CM Watson, Joe: CM Weatherbee, Eric: II Weathington, Larry: II Weathington, Barbara: SP Websper, Richard: AP Websper, Maxine: SP Werelius, Peter: II Wicks, Roger: CM Williams, Randy: AP Xu, Yan: II Yalla, Murty: II Yalla, Bhavani: SP Yu, Jennifer: II Yule, Kipp: CM Zhong, Juntao: II Zhu, Hanxin: II Ziomek, Waldemar: CM Zouaghi, Abderrahmane: II

Membership Code

CM – Committee Member CM – LM – Committee Member – IEEE Life Member AP – Active Participant

II – Interested Individual SP – Spouse GT – Guest



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25 March 2008

Participants, Patents, and Duty to InformAll participants in this meeting have certain obligations under the IEEE-SA Patent Policy. Participants:

“Shall inform the IEEE (or cause the IEEE to be informed)” of the identity of each “holder of any potential Essential Patent Claims of which they are personally aware” if the claims are owned or controlled by the participant or the entity the participant is from, employed by, or otherwise represents

“Personal awareness” means that the participant “is personally aware that the holder may have a potential Essential Patent Claim,” even if the participant is not personally aware of the specific patents or patent claims

“Should inform the IEEE (or cause the IEEE to be informed)” of the identity of “any other holders of such potential Essential Patent Claims” (that is, third parties that are not affiliated with the participant, with the participant’s employer, or with anyone else that the participant is from or otherwise represents)The above does not apply if the patent claim is already the subject of an Accepted Letter of Assurance that applies to the proposed standard(s) under consideration by this group

Quoted text excerpted from IEEE-SA Standards Board Bylaws subclause 6.2Early identification of holders of potential Essential Patent Claims is strongly encouragedNo duty to perform a patent search

Slide #1

25 March 2008

Patent Related LinksAll participants should be familiar with their obligations under the IEEE-SA Policies & Procedures for standards development.Patent Policy is stated in these sources:

IEEE-SA Standards Boards Bylawshttp://standards.ieee.org/guides/bylaws/sect6-7.html#6IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3

Material about the patent policy is available athttp://standards.ieee.org/board/pat/pat-material.html

Slide #2

If you have questions, contact the IEEE-SA Standards Board Patent Committee Administrator at [email protected] or visit http://standards.ieee.org/board/pat/index.html

This slide set is available at http://standards.ieee.org/board/pat/pat-slideset.ppt



Page 6 of 155

25 March 2008

Call for Potentially Essential Patents

If anyone in this meeting is personally aware of the holder of any patent claims that are potentially essential to implementation of the proposed standard(s) under consideration by this group and that are not already the subject of an Accepted Letter of Assurance:

Either speak up now orProvide the chair of this group with the identity of the holder(s) of any and all such claims as soon as possible orCause an LOA to be submitted

Slide #3

25 March 2008

Other Guidelines for IEEE WG MeetingsAll IEEE-SA standards meetings shall be conducted in compliance with all applicable laws, including antitrust and competition laws.

Don’t discuss the interpretation, validity, or essentiality of patents/patent claims. Don’t discuss specific license rates, terms, or conditions.

Relative costs, including licensing costs of essential patent claims, of different technical approaches may be discussed in standards development meetings.

Technical considerations remain primary focus

Don’t discuss or engage in the fixing of product prices, allocation of customers, or division of sales markets.Don’t discuss the status or substance of ongoing or threatened litigation.Don’t be silent if inappropriate topics are discussed … do formally object.

---------------------------------------------------------------See IEEE-SA Standards Board Operations Manual, clause 5.3.10 and “Promoting Competition and Innovation:

What You Need to Know about the IEEE Standards Association's Antitrust and Competition Policy” for more details.

Slide #4



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CHAIR’S REPORT – FALL ‘08 – PORTO, PORTUGAL

Chair Report F08.doc 9/1/08

1

1.0 Chair’s Report – T. A. Prevost 1.1 PES General Meeting Notes The last PES General Meeting was held in Pittsburgh, PA this summer from July 20-24. The schedule for upcoming PES General Meetings is as follows:

• 2009: July 26-30 in Calgary, Alberta, Canada PES Conference & Exposition (CE) schedules:

• 2009: Power Systems (PSCE), March 15-18 in Seattle, Washington Additional information on any of the above meetings can be found on the PES website at (http://www.ieee.org/portal/site/pes/)

1.2 PES Technical Council Activities

Because the PES only meets once per year the Technical Council now has instituted monthly conference calls to cover key topics. A summary of key issues follows:

1.2.1 O&P Manual PES has submitted a revised O&P manual to IEEE Audcom. This O&P covers the technical activities of PES but does not cover the standards development activities. The technical council O&P committee has decided to delegate the standards development O&P to those technical committees which sponsor standards development activities. This will require the Transformers Committee to comply with the IEEE SA template for standards developing committees and for the Transformers Committee to have their O&P approved directly by Audcom. 1.2.2 2008 General Meeting in Pittsburgh The meeting was very successful with over 2,200 attendees, which is a record. 1.2.3 PES TC Planning Meeting A planning meeting has been coordinated for all technical committees in Pes regarding the future of PES activities. This will be a two day facilitated meeting including representation from each technical committee within PES. Tom Prevost represented the transformers committee. The meeting is scheduled for September 27 –29, 2008. A verbal update will be given at the adcom meeting in Porto. 1.2.4 Standards Coordination Standards coordination among the different committees continues to be a concern since the advent of the electronic standards process. The role of the standards coordinator has attained greater importance as a result. Bill Bartley should be made aware of any scope conflicts or coordination issues between the Transformer and other technical committees of PES. 1.2.5 125th Anniversary of PES

Next year, 2009, will be the 125th anniversary of the Power and Energy Society. Stay tuned for events to commemorate this milestone.



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2

1.3 Transformers Committee Activities

Progress since last meeting in several areas of concern for the Committee, together with notes of Committee interest, follow:

1.3.1 C57 Standards CD

A CD of all of the transformer standards is still available from IEEE. I would again like to thank Bill Bartley, Greg Anderson and Bill Chiu as well as Matt Ceglia, our IEEE Staff Liaison for their efforts in producing this collection and making it available.

1.3.2 Committee Membership

All are welcome to participate in the work of the Transformers Committee. Membership in the Committee provides recognition of your peers and indication to your co-workers and management of your active role in Committee work. If you are presently not a Main Committee Member, and you have been actively participating in our work for at least one full year – and can secure the acknowledgement of at least 3 Activity Chairs (WG’s, but must include at least one SC Chair) affirming that participation, the Committee will look forward to welcoming you as a member. Membership requirements and application forms can be found in the Organization and Procedures Manual posted on the Committee website.

1.3.3 Association Management (AM) System

All Committee members and active participants, and all individuals interested in Transformers Committee activities, are reminded that virtually all communications on Committee meetings and activities are handled through the Committee website (http://www.transformerscommittee.org/) and through electronic media. Contact information is maintained through our Association Management (AM) system, and administration of membership and meeting attendance records is facilitated by the AM System. All Subcommittee and Working Group Chairs are encouraged to use the AM system for assigning membership within their groups and for communication with their group members. All Committee members, active participants, and interested individuals are reminded also that you are responsible personally for maintaining the accuracy of your contact information, through the AM system, for Committee activities and communication. Updating your contact information in handwriting on a meeting roster does not result in updating your Committee contact information. Keeping your contact information maintained in the AM system assures that the Chair of any Subcommittee or Working Group you are involved with will be able to communicate with you. Details on enrolling and maintaining your contact information in the AM system can be found on the Committee website.



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3

The AM system also allows you to check the Committee record of your membership status in individual Working Groups, Subcommittees, and the Main Committee. This can be done by checking your Personal Profile, and then clicking on Subgroup Details. If the Committee record does not match your record, please review with the appropriate WG or SC Chair.

1.3.3 Acknowledgments

I wish to express my appreciation for all of your efforts on behalf of the IEEE Transformers Committee. Our committee has become a model committee for PES. This is through all of your efforts both in attending our bi-annual meetings and working on working group and task force activities between the meetings. Respectfully submitted, Thomas A. Prevost Chair, IEEE/PES Transformers Committee



Page 10 of 155

2.0 Approval of Minutes from Fall, 2007 Meeting Chair asked that a motion be made to approve the minutes of the Spring, 2008 (Charlotte, NC, USA) meeting. A motion was made and seconded from the floor. The Chair asked for a voice vote, which was unanimously approved. The Chair declares the Spring, 2008 Charlotte minutes approved as written with the corrections noted during the meetings leading up to the main committee meeting on October 9, 2008.1

1 Note – prior to the main meeting committee secretary received couple of request for changes to the draft of the minutes. These changes were incorporated in the final approval.



Page 11 of 155

Administrative Subcommittee Meeting Porto, Portugal October 5, 2008

F08_3.0_AdSubcom_Minutes.doc Page 1 of 9

3 Administrative Subcommittee – Tom A. Prevost The meeting took place at the Porto Palacio Congress Hotel & Spa, Douro Room on Sunday October 5, 2008. The meeting was call to order at 3:05 pm.

3.1 Introductions Introductions were made by members and guests.

3.1.1 Members & Guests The following members of the Subcommittee were present: Gregory Anderson William Bartley Bill Chiu Richard Dudley Fred Elliott

Donald Fallon Ramsis Girgis Ken Hanus Charles Johnson Thomas Lundquist

Donald Platts Thomas Prevost Jeewan Puri J. Edward Smith (Ed) Loren Wagenaar

The following members were absent: Richard Ladroga Carl Niemann James Smith The following guests were present: Phil Hopkinson Sue McNelly (attending for Richard Ladroga) Brian Klaponski (attending for Carl Niemann) Ross McTaggart (attending for James Smith) Jin Sim The Chair indicated that IEEE staff is not present not because the meeting is in Europe, but rather there are concurrent activities that are in schedule conflicts with our meeting this week.

3.2 Meeting Minutes

3.2.1 Review and approval of the unapproved minutes from the Charlotte, North Carolina meeting

The Chair asked for comments from the Charlotte Administrative Subcommittee meeting minutes. Three minor corrections were noted: 1) the attendance record to include Jodi Haasz (section 3.1.1), 2) the other to change the terminology from Vu-Spec CD-ROM to just CD-ROM (section 3.13.2), and 3) to update the references to appropriate attachment in section 3.9. The minutes will be updated accordingly. The motion was made by Ed Smith to approve the minutes with these addition and seconded by Chuck Johnson. The motion passed with no descending votes.

3.3 Additions to and/or Approval of the Agenda The Chair reviewed the draft Agenda with the attendees. No additional agenda items were added. The agenda is included below for reference. IEEE/PES TRANSFORMERS COMMITTEE ADMINISTRATIVE SUBCOMMITTEE MEETING – DRAFT AGENDA Sunday October 5, 2008 - Call to Order 3:30 pm

1. Introduction of Members and Guests (:05) 2. Approval of Charlotte TX Admin SC Meeting Minutes



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3. Additions to and/or Approval of the Agenda 4. Meeting Arrangements, Host Report, and Committee Finances

4.1 - F’08 – Porto – GW Anderson (:05) 4.2 - Meetings/Finances - GW Anderson (:10)

5. Chair's Report – Tom Prevost (:05) 6. Vice Chair's Report – Ed Smith (:05) Time Check 4:00 PM 7. Secretary's Report – Bill Chiu (:05)

7.1 - Membership Review (:10) 8. Standards Report – Bill Bartley (:30) Time check – 4:45 PM 9. Break (:15) 10. New Business, Committee Planning (:35)

10.1 - TX Committee O&P Manual – T Prevost (:25) 10.2 - Roberts Rules of Order – J Ed Smith (:05) 10.3 - Other Time Check – 5:30 PM

11. Committee Service Awards – Don Fallon (:15) 12. Subcommittee Reports - Roundtable (:25) 13. Old Business (:20)

13.1 - IEC Joint Development of Standards – T Prevost (:20) - Time Check – 6:30 PM Adjourn

3.4 Meeting Arrangements, Host Report, and Committee Finances G. Anderson circulated a list of people who has administrative access to AMS-123 system. All in attendance were asked to verify the list and make

3.4.1 Meetings/Finances – G. W. Anderson (:10) Committee funds: Before Porto meeting the committee has available funding of approximately $28,000 ($28,030). Before the Charlotte meeting, the committee has available funding of approximately $47,000. Before the Minneapolis meeting, the committee has available funding of approximately $44,000. The Charlotte meeting took a hit financially, due in part to the expenses at Charlotte. Overall, G. Anderson felt while we are down about $19,000 from before the Charlotte meeting, our financial situation is still in good standing. Future meeting time slots and locations: S09 (April 19–23, 2009) – Miami, FL, at the Hilton Downtown Miami. Room rate is $139 per night + tax. To be hosted by Mark and Gretchen Robertson of North American Substation Services. F09 (October 25-29, 2009) – Lombard, IL (suburbs of Chicago) at the Westin Lombard Hotel. Room rate is $149 per night + tax. The hotel is only two years old. There will be a technical tour of the S&C new High Power Laboratory. S10 (March 7-11, 2010) – Location TDB. Will be in the warm part of the country.

3.4.2 F’08 – Porto – G. Anderson (:05) This particular meeting arrangement is a bit different than past meetings. Cultural differences have made the contractual arrangement a bit difficult. All events are pushed back one hour due to local customs. Meeting arrangement is going ok so far. Meeting attendance for Porto is:

Registered Attendees 285Spouses 106Sunday Reception 316Monday Standards Luncheon 124



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Tuesday Speaker Luncheon 166Wednesday Dinner Social 294

3.5 Chair’s Report – T. A. Prevost Refer to Section 1.0 for a complete “Chair’s Report.” The Chair emphasized the key item of O&P Manual for our committee. The Standards Association (SA) developed a template of the O&P Manual which governs the standards development process for the Technical Committee under Power & Energy Society (PES). This new template incorporated all the requirements and the rules that are reflected in the development of the standards. The PES group struggled over the past three years to cover all the 15 technical committees under PES. Out of these 15 technical committees, only about ten committees actually develop standards. We have two years to submit our revised O&P Manual. As discussed at the previous meeting, P. Balma has already made the preliminary suggested changes. The draft is being circulated to all the AdSubCom members. The Chair requested all to provide feedback. A deadline will be set for these comments and suggestions for revisions. The Chair indicated our desire for us to be the first technical committee to complete the update of the O&P Manual. Technical Committee Planning Committee (TCPC) PES held a TCPC offsite meeting to discuss the future of PES. With the most recent name change, PES no longer stands for the Power Engineering Society, but now stands for Power & Energy Society. From an organizational perspective, this name change brings with it some possibility for changes to scope and the possibility of reorganization of the Technical Committees and their hierarchical structure. The two main goals of the TCPC are to: 1) attract new members, and 2) to improve the quality of the participation. The driver for this change is to ensure PES is structured correctly to participate in the new energy technology and absorb the expansion of the scope of Power and Energy Society. The Chair indicated he will circulate the minutes of this TCPC planning session, but asked that it does not be circulated beyond the AdSubCom members. A question was raised whether an engineering degree is prerequisite to be a PES member. The Chair confirmed that this is not a requirement. Don Fallon encourages everyone to be open to what is being considered. We don’t like to change for the sake of change, but any organization that doesn’t look at itself periodically to make sure that it is trying to do the best it can towards meeting its purpose and function risk becoming stagnate. Please be open to change, but fight strong to oppose change just for the sake of making change. The Chair also thanked everyone for their volunteer efforts.

3.6 Vice Chair’s Report – E. Smith Refer to Section 4.0 for a complete “Vice Chair’s Report.” The Vice Chair gave some high lights from his report as follows. Several of our key folks attended the PES meeting in Pittsburg (July 20 – 24, 2008). At the TCPC meeting in Pittsburg, there were considerable discussions centered on the recognition of papers and their authors to boost the quality of the papers, but not to inhibit the development of papers. It was decided to leave the existing process as it. There are some discussions about requiring the author to be present at the poster session. There was some discussion on the low threshold on the review criteria of the papers. A combined poster/paper session is being considered. Additional discussion took place on the industry trend on papers.



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3.7 Secretary’s Report – Bill Chiu

3.7.1 Membership Review Voting Members – Seven new members was approved and added at the Charlotte, NC meeting:

o Richard L. Amos Unifin International Producer

o Paul Boman Hartford Steam Boiler Producer

o Jeff Benach On-Line Monitoring, Inc. Producer

o Robert G. Ganser Transformer Consulting Services Consultant

o Eduardo Garcia Siemens Producer

o Vinay Mehrotra Waukesha Electric Systems Producer

o Joseph P. Melanson J. Melanson, Inc. Unknown

A welcome letter will be sent to these new member. Again our aim is to encourage active participation in the work of the committee, and encourage all participants to become members of the committee. We will continue to encourage and work with all Subcommittee Chairs on a new member sign-up campaign.

Please note that we now have eight (8) member types. The AMS does not consider Interested Individuals as “active members”. A summary report on the membership statistics from our AMS system is attached to the end of this report. Notice that Interested Individuals do not show-up in the pie-charts. Membership, including changes made at the Charlotte meeting now stands at: Interested Individual 667 Interested Individual - IEEE Life Member * 1 Total Interested Individuals 668 Active Participant 216 Active Participant - IEEE Life Member * 5 Total Active Participants 221

Committee Member 194 Committee Member - Emeritus Member * 7 Committee Member - IEEE Life Member * 21 Committee Member - Corresponding Member 1 Total Committee Members 223 TOTAL IN AMS DATABASE 1112

* - indicates this member type receives a discounted registration fee.

3.7.2 New Member Applications Seven new applications for Committee Membership have been received and will be submitted for approval since the Charlotte meeting:

Applicant Name Affiliation Sponsor #1 Sponsor #2 Sponsor #3 Membership

Category

Carl Bush PEMCO Corp J. Sullivan C57.12.01

A. Molden C57.98 Impulse Test

Guide WG C. Johnson

Dry Type SC Producer

Yunxiang Chen Parsons Corp. C. Johnson

Dry Type SC P. Hopkinson

Dielectric Test Table S. Kennedy

C57.18.10 WG User

Ramon Garcia Prolec-GE

B. Paulin Low Freq. Dielectric

Test WG

A. Molden C57.98 Impulse Test

Guide WG L. Wagenaar

Dielectric Test SC Producer



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Applicant Name Affiliation Sponsor #1 Sponsor #2 Sponsor #3 Membership

Category

James (Jim) Graham Alliant Energy R. Ladroga

Insulating Fluids SC P. McShane C57.147 WG

J. Arteaga C57.12.10 WG User

Stephen H. Jordan TVA

R. Girgis Performance

Characteristics SC E. Lemke

C57.113 WG J. Harley

C57.127 WG User

Tony Pink Dynamic

Ratings, Inc.

T. Lundquist Power Transformers

SC Andre Lux

On-Line Monitoring

T. Jauch Transformer

Paralleling Guide Producer

Marnie B. Roussell Entergy G. Anderson C57.150 WG

P. Powell C57.12.90 Clause D

T. Lundquist Power Transformers

SC User

These applications will be reviewed at the Administrative Subcommittee meeting. The Committee welcomes and encourages active participants to become Members of the Committee. Requirements and application forms can be found in the Organization and Procedures (O&P) Manual, accessible on the Committee website. Subcommittee Chairs are encouraged to recommend new members, and to communicate to potential applicants that Membership is a privilege gained through active participation in Committee work at the WG and SC level. WG and SC Chairs are reminded also that signing an application sponsoring a new member signifies their sponsorship that the applicant has met the requirement of membership and active participation for at least one year in the WG or SC they Chair. New membership application can be forwarded to the Secretary’s attention at any time for review at the next AdSubCom meeting.

3.7.3 Committee, Subcommittees, and Working Group Rosters In order to provide indemnification to working group (WG) and subcommittee (SC) members it is crucial that membership lists be maintained. Our AM system has these functions built-in to ease these administration tasks. It is important that each subcommittee and working group chair or his/her designee (typically the secretary of the WG or SC) keep the rosters updated so that this information is up-to-date and can be provided to the IEEE SA.

3.7.4 Meeting Minutes The minutes of the Charlotte, NC, Spring, 2008 Transformers Committee meeting were posted to the committee website on Tuesday, September 16, 2008.

The minutes of the Charlotte, NC, Spring 2008 Transformers Committee meeting were mailed on Monday, September 16, 2008, to those who ordered printed copies during meeting registration. 39 registrants ordered printed copies of the Minutes. A total of 42 copies were printed and bound.

The cost of previous minutes was:

Raleigh (Spring ’03) $3946.82

Pittsburgh (Fall ’03) $714.27

San Diego (Spring ’04) $1481.77 (78 @ $13.60 ea. + $357.17 postage)

Las Vegas (Fall ’04) $1084.56 (60@ $12.76 ea. + $319.17 postage)

Memphis (Fall ’05) $643.07 (postage $468.07 + printing $175)

Costa Mesa (Spring ’06) $723.64 (postage $263.64 + printing $460)

Montreal (Fall ’06) $1020.19 (postage $291.25 + printing $728.94)

Dallas (Spring ’07) $1379.31 (postage $435.55 + printing $943.76)



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Minneapolis (Fall 2007) $1365.81 (postage $463.51 + printing $954.26)

Charlotte (Spring, 2008) $773.93 (postage $214.29 + printing $559.64)

Subcommittee Chairs are requested to submit their SC Minutes for the Porto, Portugal meeting by December 12, 2008. Minutes should be submitted via e-mail to the Secretary [email protected] , with a copy to Susan McNelly [email protected] for posting on the Committee website. The submittal should be formatted in Word 2007 (or earlier versions) and should be formatted in the format as shown in the present assembled Minutes, with section numbering as indicated in Main Committee Meeting Agenda. Please indicate total attendance count for each Subcommittee, Working Group, and Task Force meeting in your Minutes. Please do not send a copy of the attendance listing for this attendance count. If a SC Vice-Chair, Secretary, or other SC member is preparing the SC Minutes, please let them know these details about Minutes submittals. Please do all you can to get the minutes in as soon as possible. This will facilitate the compilation of the combined minutes. Delaying this task will only make it more difficult for the activity leaders and could cause problems in finalizing the publication and posting prior to our next scheduled meeting. In the future all Subcommittee Chairs should plan on completing and submitting your minutes and documents for publication in the posted minutes shortly following the meeting (within several weeks).

3.8 Standards Report – B. Bartley Refer to Standards Report on activity since the March, 2008 Meeting (Charlotte, North Carolina) published in the Main Meeting Minutes. Attention was call to the list of projects where PARS that have not started the balloting process and will be expiring at the end of 2008. The responsible Subcommittee chairs are requested to coordinate with each of the Working Group Chair to take appropriate actions prior to the deadline in October 20, 2008. Bill Bartley also offered to work with the activity chair to take the appropriate actions. The Standards Report is included in the Appendix C - Transformer Standards Development Status and Transformer Committee Organizational Chart.

3.9 Break The AdSubCom meeting reconvened after a 15-minute recess.

3.10 New Business

3.10.1 TX Committee O&P Manual – T Prevost The Chair requested the members of the AdSubcom to review the new draft. The Chair will be circulating the latest draft and request that all revision suggestions and comments be submitted in writing. The Chair will specify a deadline for these comments. Once a majority is received, the Chair will move ahead on this revision and will not be waiting for all to submit their comments. The Chair again emphasized the importance of the moving ahead on this expeditiously and request everyone support this important effort.

3.10.2 Robert’s Rules of Order – J. E. Smith The issue and discussion centered on the available options to educate the activity leaders on the Robert’s Rules of Order. The Vice Chair brings forth an option of having a Robert’s Rule expert observe our meetings and provided a customized training session for the activity chairs. Some additional discussions followed on the high cost of this option. After additional discussions, the AdSubCom group decided that the least cost, best fit approach is to have an information session such as the Standards Luncheon.



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Tom Lundquist made a motion: To purchase a basic Robert’s Rule handbook for all the Subcommittee Chairs, and the Working Group Chairs.

The motion was seconded. After some additional discussions, the Chair requested a vote on the motion with the following results:

Affirmative 14 Negative 1 Abstained 1

The Chair declared the motion was approved and will be acted on before the next meeting.

3.11 Committee Service Awards – D. Fallon Refer to Section 6.0 for the complete “Recognition and Awards Report.” Don Fallon gave some high lights from his report. Working Group Awards Award plaques will be mail to the recipients rather than having them haul these back home. Each of the WG also has the opportunity to request a SA Board certificate to recognize significant contributor(s) in the working group. This effort will need to be coordinated with the Award Subcommittee Chair so that we could present this recognition in the appropriate forum. IEEE SA Awards – Standards Medallion Awards The information on the criteria for Standards Medallion Award was shared with the attendees. Members were encouraged to consider for nominating candidates for this prestige award. Please contact Don Fallon for the details. PES Distinguished Services Award Distinguish service award was also discussed for both the PES level and the TC level. This award is signed by the PES president. PES Working Group Recognition Award Recognize outstanding and timely publication of technical report or standards and guides. There are two categories: 1) Technical Reports, and 2) Standards and Guides. Each technical committee may nominate one working group for such an award. The deadline for nomination is November 14 of each year. IEEE Meritorious Award Couple of individuals will be recognized for their significant contribution in this category. Names of the recipients were not released to preserve the element of surprise at award presentation. The IEEE Fellow Awards We have not nominated any Fellow Awards in the past couple of years. March 1st of each year is the cutoff time for the awards for the following year. We want to at least nominate one individual by March 1, 2009 for the Class of 2010. The process will require all paper work for the nomination be completed by the March 1, 2009 deadline. The Chair requested that a list of present fellow be included in the circulation to request nominations. Membership Certificate Will be working on creating a certificate for new members beginning in 2008. Consideration will also be given to existing Committee Members in the future. See Report from Don Fallon on Awards in the Main Committee Minutes for further details.



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3.12 Subcommittee Reports

3.12.1 Greg Anderson - Meetings Subcommittee Signage for this meeting is a bit unusual. Smaller signs will be provided by the hotel instead of our regular easels. Please be a bit more tolerant on these. The host of this meeting has pushed the limit of the signage. A large annex to the Internet Café was setup by our Host EFACEC. Please be tolerant of this. Open bar was arranged on Sunday Reception, Tuesday night, and Wednesday Social. The issues of commercial conflicts of break sponsorship were raised. There were some discussions on how best to move forward. The Chair indicated that a new process will be put in place where the sponsor queue will be made public knowledge and the break sponsor’s selection process will be made transparent. This new process should help ease some of the concerns.

3.12.2 Richard Dudley - HVDC Converter Transformers & Reactors Subcommittee NO REPORT

3.12.3 Ken Hanus - Distribution Transformer Subcommittee PC57.12.33 will be meeting to restart the effort on the loss evaluation guide. A question was raised on whether there is a conflict on the interpretation of the DOE energy efficiency guidelines. A motion was made to proceed with the work of Loss Evaluation Guide. All present voted approved with the exception of the Loren Wagenaar and Fred Elliott who abstained.

3.12.4 Don Platts - Insulation Life Subcommittee PC57.12.91 WG chair will not be attending this meeting. The IL Subcommittee Chair will be filling in for Tim Raymond in the WG meeting.

3.12.5 Tom Lundquist - Power Transformer Subcommittee Power Transformer Subcommittee received a request to study the impact of Solar PV energy source on the power transformers. There was some discussion on the need to evaluate the real need of the project. The due process would be to form a TF to evaluate the need for this project.

3.12.6 Fred Elliott - Bushings Subcommittee NO REPORT

3.12.7 Ramsis Girgis - Performance Characteristics Subcommittee The WG on the dual logo of loss tolerance guide submitted the responses received from the IEC. For the dual logo process to work well, we really have to have a WG active on both sides to work together on coordinating issues. Phil Hopkinson shared thoughts about the harmonization process between IEEE and IEC. A suggestion was raised to use the Category D liaison to harmonize the standards on a project basis. This liaison would be better served to be an European from the IEC. Additional discussion was made on the IEC and IEEE dual log and the harmonization process. There seem to be a lot of confusion. After some discussion, a motion was made by Jeewan Puri:

Motion to form an ad-hoc task force that addresses the issues of harmonization of IEEE standards with IEC Standards.



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The motion was seconded by Ed Smith and subsequently opened for another lengthy discussion, including a suggestion to develop a simple position paper on the current status of the harmonization. Suggested scope of this TF includes:

• Dual Logo • Interpretation of Harmonization • Copy Rights issues between IEC and IEEE • Category D Liaison

The Chair requested a vote on the motion. The result of the vote is all in favor except two members abstained. The Chair asked for a volunteer to lead this TF. Jeewan Puri stepped forward to lead the group. The Chair requested that the TF be formed under the Standards Subcommittee. This TF will be working closely with Jodi Haasz from IEEE.

3.12.8 Carl Niemann (Brian Klaponski) - Underground Transformer & Network Protector Subcommittee

NO REPORT

3.12.9 Bill Bartley - Standards Subcommittee NO REPORT

3.12.10 Loren Wagner - Dielectric Test Subcommittee NO REPORT

3.12.11 Jim Smith (Ross McTaggart) - Instrument Transformer Subcommittee NO REPORT

3.12.12 Charles Johnson - Dry Type Transformer Subcommittee PC57.12.91 WG chair will not be attending this meeting. The Subcommittee chair will be filling in for him in the WG meeting.

3.12.13 Jeewan Puri - Audible Sound and Vibration Subcommittee NO REPORT

3.12.14 Richard Ladroga (Sue McNelly) - Insulation Fluids Subcommittee Sue McNelly reported for Rick Ladroga. PC57.104 was approved by the IEEE SA RevCom and will be published soon. A new PAR will be requested to start the next revision of the gas interpretation guide.

3.13 OLD Business The Chair again emphasized the importance of active participation in the O&P revision.

3.14 Adjournment Meeting was adjourned by the Chair at 6:46 PM.



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IEEE Transformers Committee Vice Chair’s Report Fall, 2008 Meeting Porto, Portugal

4.0 Vice Chair’s Report – James Edward Smith The following items report on activities of the PES Committees on the Vice Chair serves as Committee representative

4.1 Technical Sessions 4.1.1 Technical Sessions Committee Meeting Review The Technical Sessions Committee met at the IEEE PES 2008 General Meeting in Pittsburgh, Pennsylvania on Monday, July, 21 2008 from 1pm to 5pm. There was considerable discussion on paper sessions during the TCPC Committee meeting. The primary topics of discussion centered on developing a way to “grade” papers from a overall quality of content standpoint. It was felt by some that lesser quality papers should be slotted for poster sessions only while the papers considered to have better topics and content be presented at the Technical Sessions. After lengthy discussions if was the overall consensus that this would be a major deterrent (in general) for developing papers for future presentation. It was felt that we currently had a very good influx of papers and we would not like to not do anything to discourage potential authors from developing papers. It was also felt that the paper development process was very time consuming on the authors part and adding an additional level of “grading” would lead to fewer papers and possibly lesser quality papers in the future. The second topic was revising and updating the dates for the 2009 General Meeting and the 2009 PSCE Meeting as well as an updated TCPC list. That updated list is now available. 4.1.2 2008 IEEE PES T & D Conference & Exposition – Chicago IL Wednesday April 23 Poster Session – Sponsored by the Transformers Committee All posters that were slotted for presentation are listed below. A notation has been made indicating if the

poster was actually presented. Please see each item.

08TD0101 A Novel Algorithm for the Diagnostics of Power Transformers Using Type -2 Fuzzy Logic Systems - E. Mombello, J. Jardini, G. Ratta. Poster was NOT presented and author was NOT present.

08TD0127 Condition Monitoring of Power Transformers - A. Dhingra, K. Singh, A. Dhingra, D. Kumar. Poster was NOT presented and author was NOT present.

08TD0183 Is it OK to Recluse on the Transformer? - D. Desrosiers. Poster was NOT presented and author was NOT present.

08TD0410 Transformer Paralleling Errors-Prevent, Correct or Ignore? - E.Jauch. Poster was NOT presented and author was NOT present.



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08TD0419 The Very Fast Transient Simulation of Transformer Windings in Parallel with MOV Based on Multi-Conductor Transmission Line Theory - Z. Zhang, C. Li, F. Lu. Poster WAS presented.

08TDO46I Time Frequency analysis method for the detection of winding deformation in transformer - S. S, J.V. Poster WAS presented.

08TD0655 Induced Voltage Test of Distribution Transformers Using Static Frequency - A. Shayegani, H. Mohseer, J.Jadidian, E.Agheb, E. Hasherni, A. Naeiny, A. Ghorbandaeipour, K. Niayesh. Poster WAS presented.

08TD0666 Dynamic Loading of Power Transformers Based on Real-Time Monitoring - B. Sparling. Poster WAS presented and author WAS present.

08TD0691 Study on Partial Discharge Self-Attenuation Characteristics of a New Dry Type Transformers and Bushings - H. Sihui, E. Euvrard, R.Wang. Poster was NOT presented and author was NOT present.

08TD0712 Innovative Power Flow Regulating Tap-Changer Control Installed on Multiple Phase-Shifting Transformers - M.Thompson, H. Miller, J. Burger. Poster was NOT presented and author was NOT present.

4.1.3 2008 IEEE PES General Meeting – Pittsburgh, PA Monday, July 21, 2008, 5:00pm – 7:00pm Poster Session – Sponsored by the Transformers Committee All posters that were slotted for presentation are listed below. A notation has been made indicating if the

poster was actually presented. Please see each item. 08GM0239 Calculation of Transformer Internal Faults in Short Circuit Analysis - G. Ghanavati,

S. M. Kouhsari, A. Kooch, M. Mahmoodan. Poster was NOT presented and author was NOT presented.

08GM0681 Application of Equivalent Instantaneous Inductance Algorithm to the Y-∆ Three- Phase Transformer - E. Jin, L. Liu, Z. Bo, A. Klimek. Poster WAS presented.

08GM0911 Parameter Identification of the Transformer Winding based on Least-Squares Method - E. Jin, L. Liu, Z. Bo, A. Klimek. Poster WAS presented.

08GM0936 Analysis on the Influencing Factors of Transformer Sympathetic Inrush Current - Y. Wang, X. Yin, D. You, T. Xu. Poster was NOT presented and author was NOT present.

08GM1151 Modeling and Simulation of Magnetizing Inrush Current of the VSC-HVDC Converter Station Multi-legged Transformer - C. Huang-fu, Z. He, F. Qian, G. Tang, J. Ruan. Poster was NOT presented and author was NOT present.

08GM0062 Correlation between Hot-Spot Temperature and Aging Factor of Oil-Immersed Current Transformers - D. R. Vanegas, S. Mahajan. Poster WAS presented and author WAS present.

08GM0246 Application of Wavelet Transform and MLP Neural Network For Ferroresonance Identification - G. Mokryani, M. Haghifam. Poster was NOT presented and author was NOT present.



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08GM0556 Effects of Moisture and Temperature on the Frequency Domain Spectroscopy Analysis of Power Transformer Insulation - K. Yew, M. Pradhan, T.K. Saha. Poster WAS presented.

2008 IEEE PES General Meeting – Pittsburgh, PA Wednesday, July 23, 2008, 8:30am – 11:30am TRANSFORMERS I Paper Session – Sponsored by the Transformers Committee All papers that were slotted for presentation are listed below. A notation has been made indicating if the

paper was actually presented. Please see each item.

08GM0992 Measuring No - Load andLoad noise of Power Transformers using the Sound Pressure and Sound Intensity Methods - Part I: Outdoors measurements - Ramsis Girgis; ABB Inc. Mats Bernesjo; ABB Inc. Keith Garner; ABB Inc. Jan Anger; ABB Inc. Paper was presented.

08GM1388 Measuring No - Load and Load noise of Power Transformers using the Sound Pressure and Sound Intensity Methods - Part - II: Indoors measurements - Ramsis Girgis; ABB Inc., Keith Garner; ABB Inc., Mats Bernesjo; ABB Inc., Jan Anger; ABB Inc., Donald Chu; Consolidated Edison. Paper was presented.

08GM1113 Influence of the Geometrical Parameters of Power Transformer Insulation on the Frequency Domain Spectroscopy Measurement - Manoj Pradhan; University of Queensland, Kelvin Yew; University of Queensland , Tapan SAHA; University of Queensland. Paper was NOT presented and author was NOT present.

09GM0330 A Multi-Purpose Balanced Transformer with Harmonic Eliminating Capab litv for Railway Traction Applications, Zhiwen Zhang; Hunan University, China Bin Wu; Ryerson University, Canada Longfu Luo; Hunan University, China, Lawu Zhou; Hunan University, China, Fusheng Liu; Hunan University, China. Paper was presented.

O8GM1477 Matrix Converter Fed Open-Ended Power Electronic Transformer For Power System Application - Krushna Mohapatra; University of Minnesota, Ned Mohan; University of Minnesota. Paper was NOT presented and author was NOT present.

08GM1495 An Accurate Hysteresis Mode! for Ferroresonance Analysis of a Transformer - Afshin Rezaei-Zare; University of Toronto Reza Iravani; University of Toronto, Majid Sanaye-Pasand; University of Tehran, Hossein Mohseni; University of Tehran, Shahrokh Farhangi; University of Tehran. Paper was presented.

2008 IEEE PES General Meeting – Pittsburgh, PA Wednesday, July 23, 2008, 2:00pm – 5:00pm TRANSFORMERS II Paper Session – Sponsored by the Transformers Committee All papers that were slotted for presentation are listed below. A notation has been made indicating if the

paper was actually presented. Please see each item.



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08GM0583 Transformer Winding Diagnostics Using Deformation Coefficient - S. V. Kulkarni; IIT Bombay, P. M. Joshi; IIT Bombay. Paper WAS presented.

08GM1013 Contribution to the Study of Transformer Tank Rupture due to Internal Arcing Development of a Computer Simulation Tool, Guillaume Perigaud; Transformer Protector Corporation Sebastien Muller; Transformer Protector Corporation Gael De Bressy; Transformer Protector Corporation Ryan Brady; Transformer Protector Corporation Philippe Magnier; Transformer Protector Corporation. Paper WAS presented.

08GM1380 Temperature distribution in Power Transformer windings with NDOF and DOF cooling - Mohammad Taghikhani; Iran University of Science & Technology (IUST Ahmad Gholami; Iran University of Science & Technology (IUST) . Paper was NOT presented and author was NOT present.

08GM1017 A Frequency Domain Transformer Model for Simulating Fast Transient Over voltages - Vicente Venegas; Instituto Tecnologico de Morelia, Jose Leonardo Guardado; Instituto Tecnologico de Morelia Enrique Melgoza; Instituto Tecnologico de Morelia, Maximo Hernandez; Instituto Tecnologico de Morelia. Paper WAS presented.

08GM1103 Circulating Current Paralleling Failures--Conditions & Consequences Erwin T. Jauch, Beckwith Electric Company, Inc. Paper WAS presented

4.1.4 2009 Event Deadlines 2009 PSCE (Power Systems Conference & Exposition Seattle, Washington March 15 – 18, 2009 Theme: The Next Generation Grid Call for papers opens: July 21, 2008 The deadline for papers submissions is: September 8, 2008 Authors will be notified by: October 15, 2008 2009 IEEE PES General Meeting – Calgary, Alberta, Canada July 26 – 30, 2009 Theme: Investment In Workforce and Innovation for Power Systems Call for papers opens: November 3, 2008 Paper submission closes: December 3, 2008 Authors will be notified (accept, reject or revised) by: February 2, 2009



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4.1.5 Calendar of Upcoming Events 2008 T&D Latin America (Sponsored by PES) August 13 – 15, Bogota, Columbia, e-mail [email protected], Web:http://www.ieee.orq.co/~tydla2008/ International Conference on Power Technolog (POWERCON) (Cosponsored by PES) October 12 15, New Delhi, India, Contact Dr. Subrata Mukhopadhyay, DII - 62 Pandara Road, New Delhi -110003, INDIA, Tel: +91-11-23383778, fax: +91-11-26170541 e-mail: [email protected] Web: http://www.ewh.ieee.orq/rl0/delhi/piconf.htm IEEE Energy 2030(Cosponsored by PES) November 17 – 18, Atlanta, GA, USA, Contact Dr. Deepak Divan, Georgia Tech, School of ECE, 777 Atlantic Dr. Atlanta, GA, 30332, USA, Tel: +1-404-835-4036, e-mail: [email protected] Web: http://ewh.ieee.org/conf/energy20301

2009 PES Power Systems Conference and Exposition (PSCE) (Sponsored by PES) March 15 -13, Seattle, Washington, USA, Contact General Chair Hardev Juj, email [email protected] or co-chair Max Emrick, email [email protected] Web: http://www.pscexpo.com/2009/ Asia-Pacific Power and Energy Engineering Conference (APPEEC) (Cosponsored by PES) March 28 – 30, Wuhan University, Wuhan, China, Contact Jing Feng, Advanced Research Center for Science and Technology, Main Building, No. 1715, District Two, Wuhan University, Wuhan Hubei 430072, China, +86-27 68775482, fax +86-27-68775482, email [email protected] Web: http://www.srpublishing.org/conference/icpee or http://www.srpublishinq.org/appeec2009Submission/website/appeec/index.aspx Powertech (Sponsored by PES) June 28 - July 02, University Politehnica of Bucharest, Romania, Contact Professor Mircea Eremia, Department of Power Systems, University Politehnica of Bucharest, 313 Spl. Independentei, 060042 Bucharest, +40 21 4029344, fax: +40 21 4029446, email [email protected] or [email protected] web: http://ewh.ieee.org/conf/powertech/2009 PES General Meeting (GM) (Sponsored by PES) July 26 – 30, Calgary, Alberta, Canada, Contact General Chair W. O. (Bill) Kennedy, [email protected] or Technical Program Chair Om Malik, [email protected]

2010 T&D Conference and Exposition (Sponsored by PES) April 20 – 22, Morial Convention Center, New Orleans, LA, USA, Contact Tommy Mayne, 30523 Woodland Dr., Lacombe, LA 70445, +1 504 427 3390, fax +1 985 882

8059, [email protected] Web: http://www.ieeet-d.orgl



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Unapproved Minutes IEEE/PES Transformers Committee Standards Subcommittee Meeting

October 8, 2008 Porto Palacio Hotel, Porto, Portugal

Page 1 of 4

1. Opening Remarks

a. Chair, William Bartley, advised the operating procedure manual is due to be updated to incorporate the name change of the PES (IEEE POWER ENGINEERING SOCIETY officially changed name to IEEE POWER & ENERGY SOCIETY).

b. For 2009 the meetings locations are planned for Miami, Florida and Lombard (near Chicago), Illinois fro spring and fall respectively.

2. Meeting Attendance

The Standards Subcommittee met on Wednesday, October 8, 2008, at 4:30 PM. The meeting roster was circulated. There were 32 members and 32 guests present. Six guests requested membership.

3. Approval of previous meeting minutes

Joe Kelly motioned for approval of the previous meeting minutes. Bill Chiu seconded the motion. The meeting minutes from the Spring 2008 meeting in Charlotte, North Carolina were approved as written.

4. Working group reports.

a. Cont. Revision of C57.12.00 – D. Kim, - The status is open for ballet

b. Cont. Revision of C57.12.90-2006 – S. Antosz- The status is open for ballet.

c. PC57.12.70 Terminal Markings Revision – S. Shull - No report, no meeting held.

d. WG on Revision of IEEE C57.152 (old 62) – L Wagenaar (for J. Verner) – The fourth Working Group on the Guide for Diagnostic Field Testing of Fluid Filled Power Transformers, Regulators and Reactors had 66 in attendance and no patents related to the work of the group; there were stated.

The Spring 08 meeting minutes were approved.

Two web meetings here held, May 14 and August 28, since the last formal meeting achieving progress in several key areas towards a revised standard.

The May 08 web meeting covered:

• References - ASTM Standards

• Annex A, Power Factor Measurement

• Purpose of Testing

The August 08 web meeting covered:

• Single Phase Excitation

• Core Demagnetization

• Future task assignments

o Section 6.1.4 Short Circuit Impedance

o Section 6.1.5 Resistance

o Section 6.1.6 Capacitance & Power Factor

o Section 6.3 Insulating Fluids Tables

A second draft was issued to WG will posted on the web. The draft includes the sections previously submitted and reviewed to date.

The review of scope was commented regarding if “acceptance criteria” is really appropriate. It was noted that Scope must match PAR and to change must really be necessary. It was suggested that an Order of



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Page 2 of 4

Precedence (or hierarchy) be added in to show Manufacturer, IEEE Standards, would take precedence over the PC57.152 Field Test Guide parameters and values.

Section 6.3, Insulating Fluids. Jerry Corkran went through the changes submitted by John Luksich to include additional fluid types in the following tables:

• Table 3 – Acceptable neutralization number values for new and in-service fluids

• Table 5 – Acceptable dielectric strength values for new and in-service fluids

• Table 6 – Acceptable interfacial tension values for new and in-service (serviced aged) fluids

• Table 8 – Acceptable dissipation factor values for new and in-service fluids

• Table 10 – Acceptable water content values for new and in-service fluids.

These tables were updated by referencing the latest revision of following guides:

• C57.106-2006, Guide for Acceptance and Maintenance of Insulating Oil in Equipment

• C57.121-1998, Guide for Acceptance and Maintenance of Less Flammable Hydrocarbon Fluid in Transformers

• C57.111-1989 (Reaffirmed 1995, 2003), Guide for Acceptance of Silicone Insulating Fluid and its Maintenance in Transformers

• C57.147-2008, Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers

It was pointed out that temperature of the oil being sampled should be recorded. This is particularly important for samples being tested for water content.

It was also noted that some values inserted into the tables did not exist in the reference guide. Jerry Corkran will check the reference guides and make certain that values not noted in the reference guides do not appear in the tables.

It was noted that Table 10 should have a reference temperature added.

Section 6.3.12, - Water Content. The Insulation Life and Insulating Fluids SCs are both reviewing the latest developments in the topic of water in the paper and oil at different temperatures. Water migrates from the paper to the oil at higher temperatures and vice versa at lower temperatures. For this reason, the TF on Moisture Estimation in Transformers has been set up within the Insulation Life SC. Tom Prevost emphasized the importance of following the policy of having the “parent” committees establish the guidelines before the WG includes them in the field guide. Hence, the WG will not include the any information about these developments until the parent SCs establish some guidelines. However, the old IEEE 62 guide does contain some information about water content so this information will be updated in accordance with the updated reference guides.

New section, FRA Testing - Matt Kennedy explained the summary submitted by himself and Charles Sweetser. The source is C57.149, Guide for Application and Interpretation of Frequency Response Analysis for Oil Immersed Transformers. Since C57.149 is still being developed, changes that will be required as they are made in the reference guide. The only comment (S. McNelly) was that the Transportation Guide PC57.150 also has FRA recommendations and there will be necessary to the various guides synchronized. The FRA is intended to be issued as an Annex in the Field Test Guide.

The section on Safety Measures to be undertaken prior to field testing of Large Power Transformers contributed by P. Ghosh was overviewed. Two comments arose; first (L. Wagenaar) the word “safety” did not seem necessary or relevant, and the attendees agreed it could be removed without effecting intent; and second (J. Corkran, M. Perkins) a cautionary statement shall be added to warn that oil sampling should be performed be when units have negative pressure relative to atmospheric pressure, as air may be pulled into insulating fluid possibly leading to failure.

P. Ghosh and L. Weathington volunteered to contribute additional input to resolve comments observed by the initial TF on IEEE 62 regarding where cautionary and potential safety warnings may be appropriate.



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Page 3 of 4

The next web meeting will be scheduled for: Thursday, 15 January 2009, 11:00 AM Eastern Standard Time.

5. PC57.12.80 – Terminology for P & D Transformers – B. Chiu

a. The definition for thermally upgraded paper has been proposed for cellulose based paper which has been chemically modified to reduce the rate at which the paper decomposes. Ageing effects are reduced either by partial elimination of water forming agents or by inhibiting the formation of water through the use of stabilizing agents. A paper is considered as thermally upgraded if it meets the life criteria as defined in ANSI/IEEE C57.100. Because the thermal upgrading chemicals used today contain nitrogen, which is not present in Kraft pulp, the degree of chemical modification is determined by testing for the amount of nitrogen present in the treated paper. Typical values for nitrogen content of thermally upgraded papers are between 1 and 4 percent when measured in accordance with ASTM D-982. (See Draft 2 for the full definition being added.)

b. A note is being added for inhibited oil to reference that Type II Oil as described in ASTM D3487 has a suitable oxidation inhibitor added to achieve greater than 0.08%, but no greater than 0.30%, by mass of the oxidation inhibitor content.

6. TASK FORCE on IEEE-IEC CROSS REFERENCE – J. Sim

1. Discussion of standards comparison

It was noted that this task force is continuous due to the IEC and IEEE documents continuously being under revision.

The table showing the IEEE and corresponding IEC documents was displayed. The list noted who is responsible for which set of documents. Several have been completed by members of the task force.

A template for the comparison was shown to allow all in attendance to see the format.

It was suggested that a possible cross reference could be done on rectifier transformers C57.18.10.

Technical committees in IEC that are included as part of this cross reference are TC10, TC14, TC36, and TC112. It was asked if any other technical IEC committees exist that should be included. There were none mentioned.

It was suggested that two additional comparisons be made. These include the following.

i. Comparison of IEC vs. IEEE procedural process.

ii. Comparison of terms relating to IEEE, IEC and CIGRE – such as the definitions of guide, standard, etc.

7. Old Business

a. IEC Dual Logo status – see the Standards Luncheon Presentation of Monday, October 6, 2008 -- Dual Logo Update: presented by: William Bartley

http://gro uper.ieee.org/groups/transformers/info/F08/F08-DualLogoUpdate.pdf

8. New Business

a. Also, as discussed in the WG 57.152 meeting; the subject of water content with respect to the Insulation Life and Insulating Fluids SCs are both reviewing the latest developments in the topic of water in the paper and oil at different temperatures. Water migrates from the paper to the oil at higher temperatures and vice versa at lower temperatures. For this reason, the TF on Moisture Estimation in Transformers has been set up within the Insulation Life SC. The Chair reemphasized the importance of following the policy of having the “parent” committees establish the guidelines before the WG includes them in the field guide. This matter was also discussed in a paper presented by Jin Sim in a TF under the Insulation Life SC at this Fall



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Page 4 of 4

2008 Transformer Committee Meeting. This task force recommended that the issue belonged with the Insulating Fluids SC not the Insulation Life SC.

9. Adjournment

a. The motion to adjourn by J. Kelly was seconded by R. Thompson, and meeting adjourned around 5:30PM.

Respectfully Submitted

Kipp J. Yule

Standards SC



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Awards Report F08.doc 1 9/28/08

6.0 Recognition and Awards – Chair: Donald J. Fallon 6.1 Committee Certificates of Appreciation Transformers Committee Certificates of Appreciation have been obtained, with approval of the PES Awards & Recognition Chair, for the following Award recipients: Name Service Rendered

Artur Fuchs Host - Fall 2008 Meeting, Oporto, Portugal Sheldon P. Kennedy Chair, Amendment 1, IEEE C57.18.10a C. Patrick McShane Chair, IEEE C57.147 Thomas Nelson Chair, Revision of IEEE C57.13 Richard F. Dudley Chair, Revision of IEEE C57.21 Richard P. Marek Chair, Revision of IEEE C57.110 Robert C. Olen Reaffirmation of IEEE C57.12.32 Daniel H. Mulkey Reaffirmation of IEEE C57.12.32 George J. Reitter Reaffirmation of IEEE C57.105 Bipin K. Patel Reaffirmation of IEEE C57.109 Subhash C. Tuli Reaffirmation of IEEE C57.119 John C. Crouse Outstanding Service - Committee Technical Editor

The Awards above related to document completion are prepared by the Committee upon approval by the IEEE SA Standards Board (IEEE SA SB) of the balloted document. Continuing the process initiated at our meeting this past Spring in Charlotte, we are including Reaffirmations with these Awards, as Reaffirmations can involve substantial effort and are an integral part of the process of maintenance of IEEE Standards documents. Revision 1 – Addendum to Clause 6.1: Subsequent to the initial report but prior to the Porto Meeting word was received of three more document approvals at the September IEEE SA SB Meeting. Recognition for these documents was announced in Porto, and awards will be presented at our Spring 2009 Meeting. The recipients are: Name Service Rendered

Paulette Payne Powell Chair, IEEE C57.12.51 (New) Richard Ladroga Chair, Revision of IEEE C57.104 Paulette Payne Powell Reaffirmation of IEEE C57.12.58

6.2 IEEE SA Standards Board Awards In addition to the Committee Awards above, the IEEE SA SB presents its own Award to the WG Chair upon publication of a new or revised document, and offers the WG Chair the opportunity to nominate significant contributors to the project for an IEEE SA SB Certificate of



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Appreciation. Recipients of these IEEE SA SB Awards and Certificates of Appreciation are as follows: IEEE SA SB Award Recipients: Name Document Published

Richard F. Dudley WG Chair Award - IEEE Std C57.21-2008 Sheldon P. Kennedy WG Chair Award, Amendment 1, IEEE C57.18.10a - 2008 Thomas Nelson WG Chair Award, Revision of IEEE C57.13 - 2008 Michael Y. Lau WG Chair Award - IEEE C57.93 – 2007 Richard P. Marek WG Chair Award, Revision of IEEE C57.110 - 2008 C. Patrick McShane WG Chair Award, IEEE C57.147 - 2008

IEEE SA SB Certificate of Achievement Recipients: Name Document Published (Nominated by WG Chair)

Pierre Riffon Significant Contribution - IEEE Std C57.21-2008 Peter M. Balma Significant Contribution - IEEE Std C57.93 – 2007 Paulette Payne Powell Significant Contribution - IEEE Std C57.93 – 2007 Susan J. McNelly Significant Contribution - IEEE Std C57.147 – 2008 Clair C. Claiborne Significant Contribution - IEEE Std C57.147 – 2008

Recognition by the WG Chair for significant contribution to a specific project is a very meaningful form of recognition, and we congratulate these recipients. The Committee encourages WG Chairs, upon receipt of notification of this award by IEEE SA SB, to consider nominating for Certificates of Appreciation those individuals whose assistance, support, and/or contributions were instrumental to the completion of the project. The Committee, with the concurrence of the WG Chair, will coordinate with the IEEE SA SB to present these awards at our meetings also. 6.3 IEEE Standards Association (SA) Awards and Recognition The IEEE SA sponsors additional awards besides the WG Chair Awards reviewed above. Discussion of these awards can be found on the IEEE SA Awards web pages (http://standards.ieee.org/sa/aw/). Note particularly the IEEE SA Standards Medallion. Excerpting from the website: “The Standards Medallion is awarded for major contributions to the development of standards. Examples of such contributions may include leadership in standardization of new technologies, assuring achievement of standards development goals, identifying opportunities to better serve the needs of standards users or other such contributions viewed as deserving of this award…” Please review, and if you have suggestions for nominations see our Committee Awards Chair. 6.4 PES Transformers Committee Distinguished Service Award



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http://standards.ieee.org/sa/aw/


We will continue to present our PES Technical Committee Distinguished Service Award each year to one of our members who is recognized by his peers as having contributed significantly and consistently to Committee Standards activities. Excerpting from the PES Awards website: “Each Technical Committee is encouraged to make one award for outstanding service. This personal recognition acknowledges the efforts of those individuals whose sustained performance, over many years, has contributed to the advancement of the committee technology.” Please see the Awards Chair if you have suggestions for future recipients. Revision 1 – Addendum to Clause 6.4: At the Porto Meeting, the Committee was most proud and pleased to present the PES Transformers Committee Distinguished Service Award for 2008 to Dr. Ramsis S. Girgis. Ramsis was elected and IEEE Fellow in 1993, has been a long-time participant and member of the Committee, and has served as both a WG and SC leader. He is recognized in the industry for his knowledge and expertise in the study of transformer core performance and transformer noise. He has over 40 years of R&D experience in the areas of power, distribution, and high frequency transformers, and has published and presented over 60 scientific papers in IEEE, IEE, CIGRE, and other international journals. Ramsis has been a mentor to many young engineers and regularly participates in tutorial sessions for the Committee. The 2008 Transformers Committee Distinguished Service Award is presented to Ramsis Girgis for his exceptional service to the Committee and to our industry. 6.5 PES Working Group Recognition Awards In addition to the Technical Committee distinguished service Awards, PES sponsors Working Group Recognition awards. The awards are related to “outstanding and timely” publications of technical reports, or of standards and guides. Excerpting from the PES website (http://www.ieee.org/portal/site/pes/) Awards pages: “The PES Working Group Recognition Awards recognize “the most outstanding and timely publications” by a PES Working Group (or Committee or Subcommittee) from among the nominations. The PES Recognition Award is divided into two categories: 1) for technical reports; 2) standards and guides. Each Technical Council Committee may nominate one report from each category, published by IEEE, during the previous three year period.” Nominations for these awards are due no later than November 14 of each year. Please review the website for more information on these awards, and on the nomination process. See the Committee Awards Chair if you have suggestions for nominations for this recognition. 6.6 Transformers Committee Meritorious Service Awards As indicated in the Awards Report from our Spring 2008 Meeting, we will initiate a process of additional recognition for Meritorious Service and Outstanding Contributions to the Committee. Suggested qualifications have been developed from a review of similar awards presented by other IEEE Technical Committees or Societies. Initially, qualifications for the award could be one of the following: • To recognize continuing exemplary service in notable technical contributions to multiple

Committee projects/documents over a sustained period of time



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• To recognize an achievement of major value and significance to the Committee. The achievement can be a specific, concisely characterized accomplishment, as opposed to a collection of different efforts.

• As with the IEEE Education Society Meritorious Service Award – “to recognize pioneering contributions to the administrative efforts of the Society over a period of years, as evidenced by dedication, effort, and contributions.”

If you have any additional thoughts on qualifications for Meritorious Service Awards, and if you have potential nominees to suggest, please contact me (individual contact for nominees, to maintain an element of surprise). Award nominees will be reviewed by the Awards Chair and the SC Officers. The first such awards will be made at this meeting in Porto. Revision 1 – Addendum to Clause 6.6: Outstanding Contribution to Committee Education: Tutorial Sessions emphasize the importance of ongoing education, and continue to be a valuable highlight of our meetings. The Committee extends its thanks and appreciation to all members and participants who have authored and/or presented Tutorial Sessions. In reviewing records back through 2003, we see that several of our members have distinguished themselves by participating in at least three Tutorial presentations. The Committee is pleased to present awards to these members for their Outstanding Contribution to Committee Education. Donald Chu Ramsis Girgis Philip Hopkinson Nigel McQuin Christoph Ploetner Meritorious and Outstanding Service to the Committee: The Committee chooses to recognize at the Porto Meeting two of our members who, in addition to an exemplary level of participation in the technical activities of the Committee, have made unique and enduring contributions to the operational and functional well-being of the Committee, and through those contributions have positively impacted the ability of each of our members and participants to perform and succeed in Committee work. Greg Anderson is a SC and WG Chair, and an active member and participant in at least seven additional TF’s, WG’s, and SC’s. In addition to this technical activity, Greg has done pioneering work for the Committee in development of processes and procedures for meetings planning and arrangements, in the specification, refinement, and implementation of the Association Management System for Committee record keeping and communication, and in responsibly maintaining Committee financial records and developing processes to allow the Committee to meet the growing financial auditing requirements of the IEEE. Greg’s work in planning, scheduling, and meeting arrangements results in cost effective, highly functional meetings that also emphasize the value of social camaraderie and ongoing education for all our participants. Susan McNelly is one of our hardest working members; she serves as the Secretary of five WG’s and the Vice-Chair of one SC, and is an active member and participant in at least seven additional TF’s, WG’s, and SC’s. On top of this heavy technical participation, Sue has participated in the development of the Committee website, and has for several years had full responsibility for the growth and enhancement of the website, to the point where it has become an essential and valuable tool for all our participants and members, and has been recognized



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within PES as a model for content and functionality of a Committee website. The website also represents a key means of making the Committee visible and accessible to the industry, thus serving a key public relations role in attracting new participants. Each of these two is worthy of individual recognition, but as their contributions have such positive impact on the ability of all our participants to work effectively, the Committee chooses to recognize them both at this time. During the Tuesday Luncheon in Porto, all rose in appreciation and applause as the Committee presented Awards for Meritorious and Outstanding Service to the Committee to Greg Anderson and Susan McNelly. 6.7 IEEE 2008 Herman Halperin Award At our previous meeting, the Committee recognized and applauded Bob Degeneff, recipient of the 2008 IEEE Herman Halperin Transmission and Distribution Award. Notation of that award did not make the prior Awards Report, and is included here. The award was presented at the PES General Meeting this past summer in Pittsburgh. Excerpting from the award citation: “Robert C. Degeneff is known in the power engineering field for his technical contributions of almost four decades to the modeling of transformer coils and windings. Dr. Degeneff’s research has led to the development of industry standards in the computation of transient voltages within transformer windings, allowing for the efficient design of insulation structures, reducing power loss in a transformer. …. An IEEE Fellow, Dr. Degeneff holds eight patents, published seven dozen papers, and several chapters in books in the electric power area. In addition, he is a professional engineer in New York and a member of several professional societies including Eta Kappa Nu.” The Committee again congratulates Bob for this award. 6.8 Nominations for IEEE, PES, and Technical Council Awards There are no nominations in these categories at this time. Regarding IEEE Fellow Nominations, we’ve unfortunately missed the boat for preparation of nominations for the 2009 Class of IEEE Fellows – lets do what we can to make sure at least one or more of our members are nominated and accepted for the 2010 Class of Fellows. Borrowing from the IEEE Awards web pages (http://www.ieee.org/web/membership/grade_elevation/grade_elevation.html): “The grade of Fellow recognizes unusual distinction in the profession and shall be conferred only by invitation of the Board of Directors upon a person of outstanding and extraordinary qualifications and experience in IEEE-designated fields, and who has made important individual contributions to one or more of these fields.” Nominations, including references by at least five present IEEE Fellows and optional additional endorsements, must be completed and submitted by March 1 of each year for the following year’s Class of Fellows. If you have a suggestion and are willing to help assemble the nomination, let me know and I will assist in the process. Recognition and awards provide motivation and encouragement to our members to perform at their highest level, and provide a welcome reward to those who do. Recognition should not be given lightly, but the accomplishments, talents, and dedication of many of our members and participants are worthy of recognition – we should look for more opportunities for appropriate



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http://www.ieee.org/web/membership/grade_elevation/grade_elevation.html


recognition. With your help we’ll do so. Please bring any other suggestions you might have for additional recognition and/or awards to my attention. Respectfully submitted, Donald J. Fallon Chair, Awards Subcommittee



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7.0 New Business The Chair opens the floor for new business items. The was no business item brought forth from the meeting attendees. The Chair declared a recess period of 15 minutes, with the meeting to reconvene at 10:35AM.



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8.1 Underground Transformers and Network Protectors Subcommittee Meeting Minutes – October 8, 2008

Brian Klaponski presiding in Carl Niemann’s absence and Giuseppe Termini acted as recording secretary.

8.1.1 Introduction/Attendance The Underground Transformers and Network Protectors Subcommittee met on Wednesday, October 8, 2008, in the 3 Rios Room of the Porto Palacio Hotel in Porto, Portugal at 12:00 noon with 5 members and 3 guests present.

8.1.2 Approval of Minutes The minutes of the March 17, 2008 meeting in Charlotte, North Carolina, were approved as submitted.

8.1.3 Membership Membership stands at 22 members.

8.1.4 Chairman’s Remarks (by Brian Klaponski) The following Administrative Subcommittee notes were reported to the subcommittee:

• Future meeting locations • There had been discussion on dual logo and harmonization at the Adm SC and a TF had been

created to create better direction.

8.1.5 Working Group Reports

8.1.5.1 Underground Single Phase Transformers (C57.12.23) – A. Traut, Chairman There was no WG meeting at this meeting in Porto. The ballot closed in June. There were no negatives to resolve so now the standard will go through the procedures to publish this standard.

8.1.5.2 Three-Phase Underground-Type Transformers (C57.12.24) – Giuseppe Termini, Chairman

The meeting was called to order by the Chairman at 12:00 noon on Monday, October 2008 in the Corgo Room of the Palacio Hotel in Porto, Portugal. Introductions were made. The meeting was attended by 5 members and 7 guests. The Chairman asked if anyone in the Working Group knew or had knowledge of any existing or pending patents that may affect the work on this standard. All responses were negative. The Meeting Minutes from the previous meeting in Charlotte, NC in March 17, 2008, were reviewed and approved. The Chairman reported that the ballot was closing in a few days and so far there was a 60% response and a 95% approval rate. He had downloaded the 26 comments that had been submitted



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so far and these comments were then reviewed. From these comments a number of editorial type changes were agreed to plus:

1) Giuseppe Termini and Brian Klaponski would review the “informative” versus the “normative” notes in the tables and drawings and make the appropriate changes.

2) The standard would be changed to make no taps as the standard and taps as an option. 3) 600 volt references would be added to all parts of Figure 4 4) ANSI references in ANSI/IEEE documents would be removed if possible 5) After the ballot closed Giuseppe Termini would email WG members regarding references

using always the lastest revisions of references being locked into particular published dates. The meeting was adjourned at 1:16 p.m.

8.1.5.3 Liquid Filled Secondary Network Transformers (C57.12.40) – Brian Klaponski, Chairman

The WG met on Monday, October 6, 2008 at 10:30 am with 4 members and 3 guests.

The chairman reviewed the patent legal issue and asked whether there were any patents or patents pending that would affect the WG or standard. None were identified.

The minutes of the March 17, 2008 meeting in Charlotte, NC were reviewed and approved.

Follow up business to the Charlotte meeting was that Brian Klaponski was to reorganize the draft specification. He had done this and submitted a new draft via email to WG members last week.

It was felt that not enough working group members were present so for the rest of the meeting the Chair reviewed in general changes he had made to Draft 4. It is intended that this Draft 4 (or perhaps a new Draft 5) would be reviewed paragraph by paragraph at the next meeting scheduled in Miami in April 2009.

The meeting was adjourned at 11:45 am with the next meeting in Miami, Florida

8.1.5.4 Secondary Network Protectors (C57.12.44) – D.H. Mulkey, Chairman 1. The WG was not scheduled to meet. 2. The standard was published in 2005

8.1.5.5 Ventilated Dry-Type Network Transformers (C57.12.57) – A.L. Robinson, Chairman

1. The WG was not scheduled to meet.

8.1.6 Old Business

There was no old business.

8.1.7 New Business

Al Traut brought to the SC’s attention that the DOE had not addressed any labeling requirements for new transformers built to the new DOE requirements. It was noted that there had been good discussion on this subject at the Distribution Transformers SC. Al



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Traut motioned that this subcommittee support the Distribution Transformers SC in this regard. Rich Graham seconded the motion and the motion was unanimously approved.

Future Meetings The location and dates for the next meetings are as follows: • April 19 – 23, 2009, Miami, Florida • October 25 – 29, 2009, Chicago, Illinois The meeting adjourned at 12:33 pm.



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8.2 AUDIBLE SOUND AND VIBRATIONS SC Chairman: Jeewan Puri

Meeting Minutes Porto, Portugal October 8, 2008

The Audible Sound and Vibrations SC met on Oct. 8, 2008 at 9:00 AM with 12 members and 11 guests present. After introductions the participants discussed the following issues: WG Report – Jeewan Puri: The WG reviewed the recent work presented by Ramsis Girgis on sound intensity measurements. He explained that:

1. The present criterion of 8 dB A difference between sound intensity and pressure difference for acceptable measurement accuracy is not correct. This criterion should be changed to 5 dB for each of the discrete main frequency measurements.

2. He suggested that the present Section 13 should not be rewritten but should be modified to include sound intensity measurements.

3. He agreed to make another presentation explaining the errors in the present ∆L = 8 dB A criterion in the next WG meeting.

Revision of C57.12.90 Section 13: It was pointed out the WG had finished writing Section 13 for C57.12.90 and C57.12.91 and submitted it for publication. They had also completed writing a measurement guide for making this test and was reviewing it for publication when Ramsis Girgis pointed out that specifying the difference of 8 dB A (∆L) in sound pressure and sound intensity measurements is incorrect. His recent work indicates that this ∆L should be no more than 5 dB at all the predominant core frequencies. The SC also considered Ramsis Girgis’s proposal that Section 13 should not be rewritten but instead only be modified per his suggestions for including sound intensity measurement procedures. It was agreed that Ramsis’s proposal will be circulated simultaneously to the WG and the SC for discussion in our next meeting. No discussion could take place on the sound level mitigation guide C57.136 since Allen Darwin could not attend our meeting. There being no new business, the meeting adjourned at 10:00 AM. Jeewan Puri Chairman - ASVSC



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1

MINUTES OF MEETING BUSHING SUBCOMMITTEE

OF THE IEEE/PES TRANSFORMER COMMITTEE

Porto, Portugal October 08, 2008

8.3 Bushing Subcommittee – Fred Elliott, Chair 8.3.1 Introduction/Attendance Fred Elliott - Chair opened the meeting at 2:30 PM and welcomed the members and guests. There were 22 attendees with 8 members and 14 guests present. Two (2) guests were added to the membership after the meeting. Copies of the IEEE patent policy summary was circulated with the meeting agenda. The policy was addressed in the meeting and no patent conflicts were reported. Since Peter Zhao, the subcommittee secretary was unable to attend, Les Recksiedler assisted in taking notes for this meeting. 8.3.2 Approval of Minutes of Last Meeting The minutes of last meeting in Charlotte, NC were approved as written. 8.3.3 Chairman’s Remarks The chair made the following remarks after attending the Administrative Subcommittee.

• Next meeting of the transformers committee will be held in Miami Florida, April 19-23, 2009.

• It is the responsibility of individual members to keep their contact information updated in the AM system. This system is used for committee communications with participants.

• A new task force chaired by Jeewan Puri is being started in the Standards Subcommittee to prepare a Transformers Committee position paper on IEC harmonization activities. Please contact Jeewan directly if you want to participate.

An additional item regarding Partial Discharge Measurements on Bushings and Instrument Transformers was added to the agenda under New Business. 8.3.4 Working Group (WG) and Task Force (TF) Reports 8.3.4.1 WG - Revision of C57.19.00 - Keith Ellis, Chair No meeting was scheduled.



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8.3.4.2 TF - Revision of C57.19.100 – Tommy Spitzer, Chair This group did not meet. The chair plans to have a draft revision ready in October 2008. Meeting attendees requested that the draft be posted on the committee website. 8.3.4.3 TF – GSU Bushings – Catherine Hurley The task force met on October 7, 2008 from 10:30 am – 11:45 am.

1. Attendance: There were 22 people in attendance, as follows: 10 Members; 4 Requesting Membership, and 8 Guests.

2. Agenda: An Agenda was presented by the Chair of the Task Force.

3. Minutes: The Minutes of the last meeting in Charlotte NC were presented and approved. 4. Comments on Title and Scope: Approximately 2 months ago the Chair sent a copy of

the Title and Scope via email to participants of the Task Force, and she received comments. The TF proceeded to discuss the comments, as follows:

Title:

a. There was considerable discussion of the Title, and whether it should include a

reference to “Generator Step-Up (GSU).” It was decided that the reference should not be included in the title, but rather, should be included in the Scope.

b. There was considerable discussion about use of the term “outdoor power

apparatus bushings.” The consensus was to remove the phrase apparatus, to avoid confusion with other types of bushings. Instead the phrase will be changed to “outdoor power transformer bushings.”

Scope:

c. BIL: There was considerable discussion about the reference limiting the scope to bushings that “have basic impulse insulation levels (BIL) of 200 kV and below.” It was noted that one or more manufacturer(s) have reduced the amount of copper in the bushings, such that the BIL is 250 kV. It was decided to remove the reference to the BIL altogether, because the limitation was seen as unnecessary. Also it was noted that C57.19.00-2004 does not contain a limiting reference to the BIL in its Scope. It was decided that the subject of BIL could be addressed or limited in the body of the standard to be drafted. Also, inclusion in the scope could require future revision of the PAR.

d. Reference to “Oil Filled” vs. “Liquid Filled” Power Transformers. After

considerable discussion it was decided that the term “Liquid Filled” should be utilized, in recognition of the industry trend to use this term, and also as a practical matter many people think of oil filled transformers as mineral oil-filled transformers. This change will avoid confusion. Also, a point of clarification, the reference is to liquid filled power transformers, as opposed to liquid or oil filled bushings.



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e. Current Rating: The question was raised whether the reference to bushings

with rated continuous current of 5000 Amps, is too restrictive, since there are some GSU and Auxiliary Power Transformers with 3000 Amp rating. No decision was made to change the reference, because the general intent is to provide a standard for large power transformers.

f. “Outdoor”: The point was raised that in the hydroelectric plant, the step-up

transformer may not be physically installed outdoors. It was decided however that because the power transformer itself was an outdoor class, the term would be kept.

g. Reference to “GSU”: There was considerable discussion. It was noted that

the general intent is to write a standard that also applies to large Autotransformers. But for the sake of indexing and helping users locate the standard for GSU, it was agreed that some reference to GSU should be included in the scope. It was agreed that the phrase “including but not limited to generator step-up (GSU) transformers,” should be added. With all the foregoing amendments, the sentence will now read” Bushings covered by this standard are intended for use as components of liquid-filled transformers, including but not limited to generator step-up (GSU) transformers.”

5. Discussion of IEC/IEEE Dual logo: The question was asked whether we should work on

the standard with the idea of certifying it for the dual logo. It was noted, however, that the standard to be drafted will include dimension specifications, and that generally IEC standards do not include dimensions, and so it may be impractical to seek a dual logo. John Graham from Trench will be attending the upcoming IEC meeting in November and he volunteered to make an informal inquiry about the subject, to see if the IEC is nonetheless receptive to a dual logo for our standard.

6. PAR: The Chair’s intent is to draft the PAR and send it out for comment before it is

formally submitted. The draft version of the PAR will be sent via email to participants of this meeting as well as the prior Charlotte meeting. Comments should be sent back to [email protected] It was decided that the PAR should request the maximum time (5 years), although work on the standard could be completed sooner.

7. Adjournment: The meeting was formally adjourned.

8.3.4.4 C57.19.03 – DC Bushing Standard – Les Recksiedler, Chair

The WG met on October 7, 2008. This was the second meeting of the WG. Fourteen (14) members and four (4) guests attended the meeting. The meeting was chaired by Mr. Les Recksiedler and the secretary was Pierre Riffon.

The agenda has been reviewed and accepted as written.

The first technical subject on the agenda was a presentation made by Pierre Riffon regarding different aspects to DC converter bushings that may need to be considered since the actual edition of IEEE C57.19.03 does not cover these specific technical considerations. The topics discussed were:



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- Determination of an heat run test equivalent current by considering extra losses produced by the specified harmonic current spectrum. A method based on the one given in Annex A of IEEE C37.23 has been presented for future consideration by the WG membership.

- Influences of high air ambient temperature and low humidity level normally prevailing in DC valve halls of HVDC converters on temperature rise performance and on dielectric withstand capability of the indoor air insulation. For the temperature rise test, simulation of the high ambient valve hall air temperature may need to be simulated by erecting a special enclosure since no correction factors are available for the time being. Moreover, special attention has to be paid on operating temperature of bushing terminals located in the valve hall. For dielectric tests, IEEE Std. 4 atmospheric correction factors have to be applied during tests or test at elevated air temperature may be needed to demonstrate the voltage withstand capability of the indoor air insulation of DC bushings.

- Needs of performing DC applied test and polarity reversal test for DC bushings intended for back-to-back converter stations having relatively low rated DC voltage (< 100 kV dc). The proposal was to change the test requirement from a routine test to a sample test since the added value of such test is questionable (very few failures have been found up to now for this voltage level) and that the risk involved for delaying a project is relatively low since delivery time of this type of bushing is significantly better than for higher rated DC voltage bushings (e.g. 500 or 800 kV DC bushings).

These three topics and suggestions were presented for future considerations by the WG membership and will be discussed in future meetings.

The second item on the agenda was related to the need of standardization of insulation level values for 800 kV DC system bushings. A join IEC-CIGRE group has been created to discuss this subject. For the time being, the WG will wait for their report and recommendations before implementing specific rated values in the next edition of C57.19.03.

The third subject was the need of incorporating special requirements related to DC converter bushings used in conjunction with VSC converters. After discussion, since this type of converters is more and more in use, specific requirements applicable to these bushings need to be implemented into the next edition of C57.19.03. Mr. Cristoph Ploetner and Mr. Ulf Radbrandt will make a proposal.

Finally, the scope of the next edition of C57.19.03 has been reviewed and needs to be reworded. It shall include gas-insulated DC bushings since they are more and more in use. Pierre Riffon will make a proposal for discussion. If accepted, the PAR has to be modified in line with the changes that will be agreed upon. Harmonization with IEC 62199 will also be considered.

The meeting adjourned at 4:00 pm on October 7, 2008.



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8.3.4.5 IEC Bushing Standards Activity - John Graham of Trench Ltd., UK

IEC60137 “Insulated Bushings for Alternating Voltages above 1000V” Edition 6 was published in July 2008 following a majority positive vote by National Committees. The content of the document was previously agreed with IECTC14 Transformers regarding an increased level of testing described in detail in my report at Minneapolis. Nevertheless, the German National Committee returned a negative vote contrary to this agreement. It is expected that during future revisions TC14 will take a firmer stand on the demand for routine lightning impulse testing of all transformer bushings at a 10% enhanced level. This work by SC36A MT5 is now closed. IEC62199 “Bushings for DC Application” This standard is the IEC equivalent of IEEE C57.19.03 currently under review. A corrigendum was published in June 2008 to correct an error in the formula for calculating the applied AC test voltage. It is proposed that SC36A MT5 take over the review of this document. IEC Meetings The IEC committees TC36 “Insulators” including SC36A “Bushings” will meet during the IEC General Session in Sao Paulo, Brazil during the week of November 17th 2008. For general interest the standard IEC60815 “Selection and dimensioning of insulators” is being revised in several parts to cover AC and DC, Porcelain and Composite. The first parts have been published with changes in the guide away from the previous simple specific creepage distances (16, 21, 25, 31..mm/kV) used in the previous document to rules more specific to site conditions. 8.3.5.Old Business 8.3.5.1 IEEE 693 Bushing Update - The IEEE 693 working group met in April, 2008 in conjunction with the Substations Committee. The group is actively revising the base document in many areas. Those specific to bushings are discussed here. The working group is also working on a Commentary, which is not an official part of the document, but which includes the background to the decisions which shaped the document. A presentation on Japanese seismic design standards and practices was given by guests, Dr. S. Murase and Dr. Y. Shumuta As discussed in previous reports, one of the major topics is the interaction between bushings and transformers. It is believed that present qualification methods do not adequately address this issue. Research aimed at this is proceeding, based on recommendations from the Bushing Advisory Committee. Still welcome more involvement from transformer manufacturers – results will affect design requirements.



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Testing as described in previous reports proceeding at MCEER in Buffalo, New York. Planned testing includes two major methods. One is to investigate the affect of cover flexibility, bushing position, etc. by means of direct shake-table tests. A bushing will be mounted to a plate with some flexibility, the plate will be mounted to a rigid frame, and parameters such as size, bushing position, etc. will be varied. The second is to combine Finite Element Analysis with physical testing of a bushing on the shake-table. A simplified FEA model of a transformer tank will be fed the inputs normally used for the shake-table. This will be solved in real-time, and the output used to control the shake-table to simulate motion at the bushing. Additional research activities include the following:

Additional testing performed on hollow-core composite insulators in attempt to come up with better acceptance criteria.

Research effort being started to study base isolation of transformers as a means of improving their seismic performance.

A related research effort is being started to look at conductor-induced loads as associated with base isolation of the transformers.

8.3.6 New Business The history and status of C57.19.01-2000 was discussed. Action on the status of this document is required by the end of 2010. 8.3.7 Technical Papers No activity was reported for this mtg. 8.3.8 Adjournment The meeting adjourned about 4:15 PM. Minutes submitted respectively by, Fred E. Elliott Chair Bushing Subcommittee



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Dry Type Transformers Subcommittee – Unapproved Meeting Minutes October 8, 2008 – Porto, Portugal

F08_8.4_DryType_Rev.doc Page 1 of 4

8.4 Dry Type Transformers SC Chair Charles Johnson

8.4.1 Introductions and Approval of Minutes

The SC meeting was held at 2:30 pm on Wednesday, October 8 2008 in 3 Rios, Piso 1 of the Porto Palácio Congress Hotel, with 6 members and 9 guests. The minutes from the Charlotte meeting were approved as written.

8.4.2 Working Group/Task Force Reports

The next order of business was the presentation of the reports of the various working groups and task forces. See the following sections for the individual reports:

8.4.2.1 WG Dry Type Thermal Evaluation C57.12.56/60 Chair Roger Wicks The working group met in Porto, Portugal at the Porto Palácio at 2:45 PM on Monday, October 6, 2008 with 5 members and 12 guests present, with two guests requesting membership. Attendees introduced themselves and signed a roster. The Chair reviewed the minutes from the last meeting, which were approved as read. The chair reviewed the patent documents for our meeting, and no patent related issues were noted for the work of this working group. The Chair provided an update to the status of the document. A ballot was conducted of the dry-type subcommittee and comments received from that ballot were incorporated into the document. The Chair reviewed these, mostly editorial changes, which should help with the official ballot to be submitted soon. Chuck Johnson, DT Subcommittee chair noted that C57.12.56 (open wound standard) has been extended for one year to allow completion of our work. Finally the chair showed the updated pictures for the document and solicited help from the Working Group to put them into a better form and Don MacMillan volunteered to help. With this, the meeting adjourned at 3:05 PM.

8.4.2.2 WG for Revision of IEEE C57.16: Dry Type Reactors Chair Richard Dudley The W.G. for the Revision of IEEE C57.16 (Dry Type Reactor T.F.) met on Oct. 6, 2008 at 9:00 a.m. in the Corgo Meeting Room, of the Porto Palacio Congress Hotel in Porto, Portugal. There were 11 members and 9 guests present. The following are the highlights:

1. Introductions were made.

2. The minutes of the Charlotte W.G. meeting were approved.

Note: The minutes of the Porto meeting won’t be approved until the meeting of the W.G. in Miami, Florida.

3. There are no patent issues re the revision of IEEE C57.16.

4. The remainder of the meeting focused on the revision of IEEE C57.16, and in particular, discussions on Draft #2 prepared and distributed by the Chairman prior to the meeting, including comments received prior to the W.G. meeting. The following are the highlights:

a. Annex F covering possible circuit breaker TRV issues associated with the application of current limiting reactors was discussed. The background behind the issue will be better



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described in Annex F and also in the “Introduction” to the revised standard. In simple terms, one of the purposes of using a current limiting reactor is to protect the circuit breaker from fault current beyond its s.c. rating, but in applying the current limiting reactor, the TRV capability of the circuit breaker might be exceeded. The example in F8 will be expanded to illustrate the use of current limiting reactors in NA distribution systems vs European distribution systems; NA – CLR, circuit breaker, feeder vs Europe circuit breaker, CLR, feeder. An additional figure will be added. Neutrals are treated differently in Europe vs NA. Also the type of/and usage of fuses is different; expulsion fuses vs current limiting fuses. Klaus Pointner and Pierre Riffon will provide input.

b. The turn-to-turn test was discussed. The turn-to-turn test has been extended to 138kV systems and is the preferred test vs the lightning impulse test. It should also be described as an alternative vs as being equivalent to the impulse test. More detail will be provided re the turn-to-turn test such as the range of size of the capacitor to ensure a reasonable “ringing” frequency and hence duration of voltage application per decaying sinusoidal envelope. For system voltages ≤ 34.5 kV (≤200kV BIL), the test voltage will be applied to one terminal only; as is now required in the current published version of IEEE C57.16. For critical reactors employed on system voltages > 34.5kV (>200kV BIL), the duration of the turn-to-turn test should be divided into two equal parts; 30 seconds per terminal. This also holds for reactors where the BIL is lower than 200kV due to the use of LAs but are installed at system voltages >34.5kV. Note 2 of Table 5 partly addresses the issue but may have to be modified.

c. Pierre Riffon’s proposal for an optional impulse design test was discussed; including the requirement of 15 full waves of positive polarity applied to each terminal. This option is not intended for lower system voltage (“less critical”) reactors but for “critical” transmission class series reactors. No consensus was reached, but Pierre Riffon will provide additional background wording for his proposal.

d. The switching impulse is only applicable for reactors employed on system voltages 230kV and above.

The chairman agreed to provide Draft #3 by early 2009, but requires denoted inputs as soon as possible. The meeting adjourned at 10:13 a.m.

8.4.2.3 IEEE PC57.12.52 - Sealed Dry Type Power Transformers Chair Sheldon Kennedy

The Working Group met on Monday, October 6, 2008 at 10:30 AM with 4 members and 5 guests present. Sheldon Kennedy chaired the meeting. The IEEE disclosure statement was read. There were no patents pertaining to this standards work for which any members had awareness. Minutes of the March 17, 2008 meeting in Charlotte were reviewed and approved. The Chair announced that we were beginning work on C57.12.52, which had been approved as a PAR by IEEE. The PAR was granted on May 7, 2007 and will expire on December 31, 2011.



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The Chair reminded everyone that this was an old NEMA document that had been brought into IEEE and needed to be changed to the IEEE format. Also, the document is old and much of the information is outdated. The document was reviewed through clause 5.7 at the last meeting. At the last meeting we weren’t sure how to proceed on clause 5.7 that dealt with differences in pressure limitations on the tank for other gases other than dry air or nitrogen. Freon is no longer used for this application. It was decided that since no other gases other than dry air or nitrogen are being covered in this document we should just eliminate this clause. In clause 5.8 we will remove the comments about other dielectric gases in relation to a shut off valve, but will maintain the requirement for a shutoff valve. Clause 5.10 made a welded cover. This will be revised. A welded cover will be standard, but a bolted gasketed cover may be specified. Clause 5.10.2.1 gives specific information for tank pressure and vacuum requirements for other dielectric gases other than nitrogen or dry air. This clause will be removed and 5.10.2.2 will become 5.10.2.1. Clause 5.10.3.2 gave information about lifting facilities. Subhas Sarkar will review this clause for possible revision. Figure 4 under 5.10.3.3 Jacking Facilities did not reproduce in the document conversion. It will be added. Clause 5.10.4 Ground Pad will be reviewed for language with other more current standards. Part II of this document needs to be rewritten from the NEMA format of Part I and Part II to a continuation of the document. These clauses deal with other requirements and alternatives. Clause 8.1.1 will be eliminated as written and we will refer to the loading guide, C57.96 for other ambient conditions. The existing clause is very specific to a 40 C average ambient with a 50 C maximum ambient condition. Clause 8.1.2 regarding other minimum ambient temperatures will be eliminated. Clause 8.2, 8.2.1 and 8.2.2 will be eliminated as they refer to outdated winding temperature rise conditions. This is covered in C57.12.01 and does not need to be repeated. Clause 8.3 refereed to other insulation systems which are now outdated. This clause will be removed as it is covered in C57.12.01. Clause 8.4 .2 referred to other high-voltage ratings. These are covered in C57.12.01, so it will be referred to and the rest of the of the clause will be removed. Clause 8.5.1 discusses other kilovolt-ampere, voltage and BIL combinations. The language will be removed as it is out of date and we will refer to C57.12.01. Clause 8.5.3 discusses the angular displacement of Y-Y connected transformers. We will remove the language and refer to C57.12.01. Clause 8.5.4 will be retained but re-titled as “Neutral Connections of Y-Y Connected Transformers”. Clause 8.7 discusses other options BIL levels. The table is out of date and we will eliminate it and refer to C57.12.01. Chuck Johnson volunteered to review the last three pages of the standard and make comments. The chair will circulate these to the working group members for comment. Agreed upon changes will be incorporated into the new draft document.



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There was no other old business or new business. Time expired and the chair asked members to continue to review the document for proposed revisions. The meeting was adjourned at 11:45 AM.

8.4.3 Old Business There was no old business

8.4.4 New Business The SC chair conducted a review of all Dry-Type standards to determine their present status and identify what actions and resources would be needed in the future. The chair then discussed the immediate need for a SC secretary and additional WG chairs and that he was asking for volunteers. After the meeting, Lewis Powell volunteered for the position as secretary; the chair accepted his offer and will inform the Administrative SC. Kip Yule discussed an issue he had noted during the witnessing of thermal tests for a dry transformer at a manufacturer. Although both HV and LV windings were within the specified value, Kip stated that the measured temperature rise of the LV winding was 25° C lower than the HV winding. Kip’s concern was that if the temperature monitoring device’s “fan-on” relay is set at the normal temperature and the temperature probe is placed in the LV winding, the possibility exists that the HV winding could overheat and the maximum insulation temperature could be exceeded in that winding. The matter was discussed with the SC and as an action item, the chair will discuss the issue with John Sullivan, chairman of the WG for C57.12.01. Kip will also forward his comments to John Sullivan. There being no further business, the meeting was adjourned at 3:40pm.



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8.5 Distribution Transformer Subcommittee Report Ken S. Hanus - Chairman [email protected] The Distribution Transformer Subcommittee has a total of 9 active working groups/task forces, 4 of those met in Porto. Subcommittee Meeting Wednesday October 8, 2008 at 10:30 AM 12 Members 10 Guests 22 Total 2 Requests for membership

8.5.1 Chair's Remarks & Announcements: Review of Administrative Committee meeting highlights

• Future Meetings • The Unapproved Charlotte minutes were approved with no corrections • Al Traut and Don Duckett are the new co-chairs of C57.12.33, Loss Evaluation Guide

8.5.2 Working Group Reports 8.5.2.1 C57.12.20 Overhead Distribution Transformers Alan Wilks & Tommy Cooper Co Chairs [email protected] & [email protected] PAR Status: Approved 9/15/2006 PAR Expiration Date: 12/31/2010, Current Standard Date: 2005 Current Draft Being Worked On: D1 Did not meet in Porto 8.5.2.2 C57.12.38 Single-Phase Padmounted Distribution Transformers Combined C57.12.25 & C57.12.21 Ali Ghafourian & Mike Faulkenberry Co Chairs [email protected] & [email protected] PAR Status: Approved 12/08/1998 (For combining Standards C57.12.25 & C57.12.21) PAR expiration Date: 12-31-2009 Current Standard Date: 1995 Current Draft Being Worked on: D6.2, Dated: January 2008 Did not meet in Porto 8.5.2.3 C57.12.28, C57.12.29, C57.12.31 & C57.12.32 Cabinet integrity Standards Bob Olen & Dan Mulkey Co Chairs [email protected] & [email protected]



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mailto:[email protected]



Did not meet in Porto 8.5.2.4 C57.12.33 Loss Evaluation Guide for Distribution Transformers Don Duckett & Al Traut Co Chairs [email protected] & [email protected] PAR Status: New PAR to be submitted PAR expiration Date: N/A Current Draft Being Worked On: D9 April 2003 Attendance: 31 Total 5 Requesting membership 26 Guests The meeting was called to order at 10:30 am on Tuesday October 7, 2008, in the Corgo Room at the Porto Palacio Hotel in Porto, Portugal. This is a new working group so there were no minutes from previous meetings to approve. A request was made for disclosure of any patents that may be related to the work of the WG, and there were no responses to the request for disclosure. Chair briefly gave an update on the status of the document. The document was previously developed but never got approved or published. After many requests the decision was made to reactivate the WG and complete the work. Even though the DOE has come out with minimum efficiency requirements there will continue to be multiple designs a user may need to do a total owning cost (TOC) evaluation, based on his/her particulars. Chair stated this is to be a guide and it was suggested wording be added to indicate another purpose of this document is to provide education on the methodology of TOC. The meeting next focused on the Scope and Purpose of the draft. It was decided to move the second paragraph of the Purpose to the Introduction and add wording to the third sentence “and allow the user to evaluate multiple designs…..”. The WG discussed the limits in 1.2.2 on kVA and voltage ranges and a motion was made and passed to make the high voltage limit 69 kV and below, low voltage limit 34,500 volts and below, single phase 6667 kVA and below, three phase 10,000 kVA and below and cover both liquid and dry type units. This will make the document cover the voltage and kVA ranges of all the distribution transformer documents. A motion was made and passed to delete 1.2.1 because it really was stating what the purpose was and not the scope, therefore 1.2.2 becomes 1.2.1. In new business Mahesh Sampat brought up the idea of providing a method to factor in carbon emissions. Below is what Mahesh submitted to the WG. After much discussion it was decided this would be an agenda item at the next meeting.

Treatment of Cost of Emission in the Calculation of Loss Evaluation (A/B) Factors



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Submitted by

Mahesh P. Sampat

Cost of Emissions: Almost all published literature on this subject has not even mentioned much less develop methodology to calculate Cost of Emissions in the Transformer loss evaluation equation. In today’s environmentally conscious and sensitive world, it would remiss us if we did not address this topic.

The Cost of Emissions can be described in both economic and social terms. All power generation activities using fossil fuel emit Greenhouse gases along with other pollutants such as SO2, NOx, Mercury and Particulates. Even non emitting generation method such as nuclear has Spent Fuel disposal costs. Societal costs of pollution (effect on health, life span, climate change etc.) are much more difficult to quantify in economic terms and hence are ignored here (Unfortunately).

Treatment of Economic Value:

Most of above mentioned pollutants require permit to emit. Many have Cap and Trade systems. In these systems; user emitting more than permitted amount needs to buy allowances from another user who emits less than his allocated allowance, thus creating market values for these allowance units. For SO2, NOx & Mercury there is an active trading market. In some western countries (Europe) CO2 allowance has a monetary value. It is very likely that US will have some kind of Carbon Regulation, either as direct Tax on Carbon or more likely some form of Cap and Trade system for CO2.

The best way to treat these emission costs are to calculate effect of these as part of

Energy Production cost and add to Energy Costs (EC), rather than develop another factor (such as C) for it.

All generating facilities have to know amount of pollutants they are emitting as a part of

compliance requirements. They also know amount of electricity they produced (kwhr). Thus it is easy to arrive at Tons/kwhr of pollutants. Each pollutant allowance has Current market value such as for SO2 it is around $700/ton while for NOx it is around $2000-$3000/ton depending on vintage. For Mercury it is $40,000/ton. Thus depending on type and amount of emission the plant has $/kwhr Cost of Emission. This current value can directly be added to Energy cost (EC).

The author recognizes that economic value of Emission is very much dependent on

Regulatory and Political climate; resulting in a wild fluctuations from time to time, making future projections (needed for TOC Calculations) somewhat challenging. ----------------------------------------------------------------------------------------------------------------



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Another item brought up for discussion was the idea of “Band of Equivalence” (BOE) and should a methodology of how to use it be added. It was discussed either it can be used or the time over which the evaluation is made can be shortened. The item will be discussed at the next meeting and it was suggested the guide could contain some sample calculations to illustrate and educate the user on the effects of BOE. Another new item of business was how to evaluate wind farm transformers. It was noted that when the wind does not blow the transformer losses now are supported from the grid and the cost to sell power vs. the cost to buy power may differ. It will also be discussed at the next meeting. Lastly it was brought up the current draft is not in the latest document style and will require bringing up to the most current requirements of style, organization and reference requirements. This will be worked on before the next meeting. The WG adjourned at 11:29 and will need a meeting slot in Miami. 8.5.2.5 C57.12.34 Three-Phase Padmounted Distribution Transformers Ron Stahara & Steve Shull Co Chairs [email protected] & [email protected] PAR Status: Approved 3/20/2005 PAR expiration Date: 12-31-2009 Current Standard Date: Published March 8, 2005 (2004 date on document) Current Draft Being Worked On: D4A March 2008 Did not meet in Porto 8.5.2.6 C57.12.35 Bar Coding For Distribution Transformers Lee Matthews & Giuseppe Termini Co Chairs [email protected] & [email protected] PAR Status: No current PAR Current Standard Date: 2007 Current Draft Being Worked On: N/A Attendance: 7 Total 4 Members 3 Guests The meeting was called to order at 2:45 PM on Monday October 6, 2008, in the Tamega Room at the Porto Palacio Hotel in Porto, Portugal. The WG did not meet in Charlotte so no minutes were required to be approved. A request was made for disclosure of any patents that may be related to the work of the WG, and there were no responses to the request for disclosure. The chair brought to the working groups attention the last revision of the document focused on adding Step Voltage regulators to the document.



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The chair asked if any users were requiring bar coding to be put on their transformers. There was some response with those responding requiring some level of bar coding but each had there own requirements. There was discussion as to how the DOE ruling on transformer efficiency may affect the document. It was brought to the groups attention the DOE had not addressed any labeling requirements. For now the group decided to wait and see what labeling requirements the DOE may develop along with what requirements users may develop as to record keeping and labeling requirements for units meeting efficiency requirements by the DOE. Chair asked if there was any other new business or proposed changes to the current version and none were brought up. It was decided no meeting in Miami was required. Meeting was adjourned at 3:02 PM 8.5.2.7 C57.12.36 Distribution Substation Transformers Both Positions Open PAR Status: PAR Approved June 2002 PAR expiration Date: December 2008 Current Standard Date: Approved at September 07 REVCOM The WG did not meet in Porto 8.5.2.8 C57.15 Step-Voltage Regulators Craig Colopy & Gael Kennedy Co Chairs [email protected] & [email protected] PAR Status: APPROVED Date: June 9, 2005 PAR Expiration Date: December 31, 2009 Current Standard Date: C57.15 – 1999 – Published April 2000 Current Draft Being Worked On: Draft 8.4, September 2008 Meeting Date: October 7, 2008, 2:45 pm Attendance: 15 Total 12 Members 3 Guests Introduction of all present were made and the Attendance Sheets were passed around. Minutes of the last meeting on 18 March 2008 in Charlotte were approved. IEEE Patent Policy was presented to group and no responses or comments were raised. Much work has been accomplished since the last meeting in March. Comments from the working group on Draft 8.0 were incorporated for the development of Drafts 8.1 and 8.2. Further work in



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the areas of Short Circuit withstand, Control type testing and characteristics of the pressure relief device were incorporated in Drafts 8.3 and 8.4. These latest changes were discussed and verbal approval was provided by the members present. Key changes with regard to Short Circuit withstand was the addition of an asymmetrical 2.6 times factor for regulators rated 165 kVA and higher. Maximum symmetrical short circuit withstand was lowered from 20,000 to 16,000 amps. IEC Control type tests series 61000-4 were replaced by available series 60255-22 for the purpose of establishing the test level of severity of each of the types of testing. Characteristics of the pressure relief device has been set at 5 PSI with a flow rate of 50 SCFM. A comment template was sent out to the working group in conjunction with Draft 8.4 being placed out on the Distribution Transformer SC website. Comments are being asked for from the working group on Draft 8.4 by November 14, 2008 Work has also been done behind the scenes preparing the document for acceptability by IEC and IEEE for Dual Logo. Input on the use of reference standards from IEEE and IEC has been provided by IEEE and IEC editorial staffs. Latest Draft 8.4 has been submitted to Phil Hopkinson, chairman of the IEC TC-14 Advisory Group for technical review. Discussion on this latest Draft has been placed on the agenda for the IEC TC-14 plenary meeting taking place in Sao Paulo, Brazil, November 19. Comments from the PC57.15 working group, the IEC TC-14 Advisory Group and the IEC TC14 Brazil meeting will be provided for review along with a revised Draft 8.5, if necessary. Plan is to submit the latest draft through the ballot process in the first quarter of 2009. Motion was made to adjourn and passed with no objection. Meeting was over at 3:30PM 8.5.2.9 C57.12.37 Electronic Reporting of Test Data Richard Hollingsworth & Thomas Callsen Co Chairs [email protected] & [email protected] PAR Status: Need to submit PAR for next revision PAR Expiration Date: N/A Current Standard Date: July 2005 Current Draft Being Worked On: N/A Did not meet in Porto 8.5.2.10 Task Force on Loss Evaluation & DOE Efficiency Phil Hopkinson Chair, Secretary: Scott Choinski [email protected] Attendance: 37 Total



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Mr. Hopkinson reviewed slides from his presentation titled “Distribution Transformer Energy Efficiency Task Force.” The presentation is posted on the IEEE Transformer Committee Website under the Distribution Transformers Subcommittee. The first point brought up was the ruling goes in effect for units manufactured on or after January 1, 2010. It does not cover units manufactured before that date but sold after the date. Mr. Hopkinson reviewed changes made in the efficiency tables with respect to the discrepancies between corresponding three phase and single phase sizes such as a 75 kVA single phase and 225 kVA three phase. Mr. Hopkinson also reviewed the various efficiency levels that were considered and how they were developed and where the final ruling landed. There was also discussion about the factors used in the DOE’s analysis for rises in the cost of materials and energy and how that may or may not have been accurate. DOE does not have an enforcement program and is relying on the Honor System and Whistleblowers to find violators. Fines for violations are steep.

It was discussed there are two issues which need clarification from the DOE. One is on Dual Voltage transformers and at which voltage rating will efficiencies need to be met. Currently the final rule indicates efficiency measured on highest loss connection. This has been appealed to DOE for resolution. The other issue is on units with secondary coils that can be connected either in parallel or series. Typically these are used most of the time in a series configuration but the parallel configuration is the more stringent connection. This also has been appealed to DOE for clarification and hopefully they will rule efficiencies are based on the connection a unit is shipped with. Bottom line efficiencies are high and any slight change in efficiency equates to large differences in cost. New Business The TF also discussed the fact DOE did not address labeling or documentation of units meeting efficiency requirements. Some utilities are requesting units before the January 1, 2010 meet the new ruling and the problem is how do you label a unit to show it meets the new ruling or how do you document on test reports a unit meets the requirements. After much discussion it was to decided to bring this issue up to the subcommittee for resolution. The meeting adjourned at 1:05 PM. 8.5.3 Subcommittee Old Business:



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Marcel Fortin asked about the status of his concerns in C57.12.20. He had filed an appeal on a motion by the WG relating to tank withstand requirements. The appeal has not been responded to by the SC chair and will be done in a timely manner. 8.5.4 Subcommittee New Business: The issue of how to label and document distribution transformers meet the new DOE efficiency rules was discussed. DOE does not have any rules whether a unit shall be labeled or not and if so what the labeling requirements are. They also do not have any requirements on documentation of meeting DOE requirements. All agreed there needs to be a standard on how to label and document a unit meets DOE requirements. Two recommendations were made and past. The first recommendation was: To confirm compliance to the new DOE regulations for distribution transformers, each distribution transformer that is compliant to the new DOE regulation shall have:

1) a nameplate with the following notation: "DOE Compliant 2010" 2) a 50 mm (2 inch) round green decal applied to the outside of each transformer tank. The specific green color of the decal is to be selected by the Chair of the Distribution SC with consideration for contrast to tank colors. 3) a test report stating: "DOE efficiency compliant". As discussion on the above in addition to providing appropriate labeling it was felt that this was also a good way to ensure each manufacturer respected the honor system expected by DOE regulation.

The 2nd recommendation was: The Chair of the Distribution SC was given the authority to act at his own discretion to find a way to implement the above motion in IEEE distribution transformer standards as expediently as possible through an errata to an existing standard or through other similar means. SC chair will work to start the process to identify the means and vehicle to make this happen. If we do not then users will come up with 50 different ways to do it. Jerry Corkran brought to the SC attention work being done in the C57.12.90 WG as related to changing how heat run tests are being done. He stated the requirements are not flexible enough to allow for differences between a small distribution transformer and a large power transformer such as the differences in the time constant. He asked everyone to provide input so the end product is acceptable to all. The meeting adjourned at 11:30 AM



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Dielectric Test Subcommittee – Unapproved Meeting Minutes October 8, 2008 – Porto, Portugal

F08 Dielectric Tests Subcommittee Page 1 of 8

8.6 Dielectric Test Subcommittee – Loren Wagenaar, Chair; Thang Hochanh, Vice-Chair; Dennis Marlow, Secretary

The Dielectric Test Subcommittee (DTSC) met on Wednesday, October 08, 2008 at 12:00 pm in Porto, Portugal with 53 of 113 members, and 49 guests present. 5 of the guests requested membership and are welcomed into the Subcommittee. 8.6.1 Chair’s Remarks 1) The Chair reviewed highlights of the Administrative Subcommittee meeting

held on Sunday:

a) The next meetings: 1) Spring 2009, April 19 -23 (Hilton$129) – Miami Florida, North

American Substation Services 2) Fall 2009, October 25-29 (Westin $149) – Lombard IL USA Exelon 3) Spring 2010, March 7-11 (firm) – location to be determined

b) You should all note the official name change of PES is now Power and

Energy Society. The reason for the change is to absorb the new technologies that are emerging.

c) Harmonization and copyright issues are becoming a problem with IEC and IEEE. A new Task Force to be chaired by Jeewan Puri has been set up to address these issues and inform the TC of its implications. This has been a moving target in the past, and the goal of the new TF will be to write a position paper as viewed from the Transformers Committee.

2) The Chair announced that Dennis Marlow has accepted the position as

Secretary of the SC. 3) The minutes of the spring 2008 meeting in Charlotte, NC were approved as

written, and are available on the IEEE Transformers Committee Web Site. 8.6.2 Working Group Reports 8.6.2.1 Working Group on Revision of Low Frequency Tests – Bertrand

Poulin, Chair; Bill Griesacker, Secretary IEEE/PES TRANSFORMERS COMMITTEE

The Working Group on Revision to Low Frequency Tests was called to order at 12:00 PM on October 6, 2008. There were 49 attendees comprised of 14 members and 35 guests; 5 guests requested membership. The minutes from the March, 2008 meeting in Charlotte, North Carolina were approved. The IEEE patent policy was mentioned and the group was asked if there were any disclosures. There were none voiced.

TF Electrical Partial Discharge Measurements Guide C57.113 - Dr. Lemke presented minutes of the TF meeting. Draft 3 was a thorough re-write of Draft 2 and will be available on the TC website within a few weeks of this meeting. This



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document will be circulated among the WG before sending out for balloting. Draft 3 was written to keep this document from conflicting with copyright of the IEC 60270, Measurement of Partial Discharges standard. At this point, the draft is considered harmonized but not in copyright infringement of the IEC standard. Old Business: Impulse test for Class I transformers to be a routine test – This issue is transferred to the Special Dielectric Test Issues Task Force. Insulation power factor and capacitance routine for Class I transformers – This test will be changed to a required test for Class I transformers. No objections were voiced to the Chairman’s proposal. It was also requested to change the category of Winding Insulation Resistance Test to “routine”. Low frequency tests of auxiliary devices on Class I or distribution transformers – It was stated that this change was already implemented in the standard C57.12.00. A request for adding the following criteria to section 10.8.6: The enhancement of the voltage has not created a significant and steady increase in partial discharge activity. In this context, the partial level recorded during the one hour level must be compared to the level recorded just before the enhancement. The increase if any should not be more than 150 pC. The wording of this proposal needs to be better defined. Loren Wagenaar will prepare a new proposal for this topic. Loren Wagenaar will write a proposal on the issue of running all pumps during the induced test. It was stated that only running the pumps may not be enough to initiate possible electrostatic electrification; temperature may be an important factor. It is understood that this is an ODAF condition, it was questioned if OFAF transformers have been affected by static electrification; the response was “no”. TF on PD measurement for bushings and CTs. This topic will be discussed at the meeting of the Instrument Transformer SubCommittee. New Business: Should the 1 hr. test be performed on all Class I transformers? It was stated that this test is overkill. It was also stated that there may be a need in the field to know the PD level. It was suggested that it may be appropriate to measure PD during the 1 min. level. Subash Tuli was asked and agreed to research and submit a proposal to incorporate PD measurement to help resolve this issue. The meeting adjourned at about 1:00 p.m.

8.6.2.2 Working Group on Revision of Impulse Tests – Pierre Riffon,

Chair; Peter Heinzig, Vice-Chair



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The WG met on October 6, 2008, from 4:15 pm to 5:30 pm. Thirteen members and twenty-two guests attended the meeting. The meeting was chaired by Pierre Riffon, chair of the WG.


The minutes of the Charlotte meeting were approved as written.

The IEEE patent disclosure requirement policy was discussed. None of the members and guests present during the meeting was aware of any patents related to the work of this WG.

The first technical item of business was dedicated to a new proposal related to the grounding of neutral terminal(s) during switching impulse tests. The actual edition of IEEE C57.12.90 does not describe the condition of neutral terminal(s) during switching impulse tests. A new clause will be added saying that accessible neutral terminal(s) which are intended to be grounded during service shall be solidly grounded or grounded through a low-ohmic shunt during switching impulse tests. An informative note will be added giving information on what is meant by a low-ohmic shunt. A revised proposal will be surveyed prior to the next meeting within the WG and Dielectric Tests Subcommittee.

The second item of business was to discuss a new proposal related to the tap changer position during lightning impulse tests. The actual edition of IEEE C57.12.90 does prescribe all tests to be performed with the tap changer position set to the minimum effective turns. A proposal aligned on IEC 60076-3 philosophy has been presented. This proposal asks to change the tap changer position from minimum effective turn to neutral position and finally to the maximum effective turn positions, one tapping for each of the individual phase of three-phase transformers and one tapping for each of the different units of a three-phase transformer bank consisting of single-phase units. Contrary to IEC practice, the proposal gives the same rules without consideration to the tapping range in order to simplify testing requirements and to adequately test windings with de-energized taps such as in some power transformers and in distribution transformers. A revised proposal will be surveyed prior to the next meeting within the WG and Dielectric Tests Subcommittee.

Finally the last item of business was related to the number of impulses to be applied during lightning impulse test and switching impulse tests. The proposal was to align the IEEE C57.12 90 impulse testing practice with IEEE Std. 4 and IEC impulse testing practices by requiring 3 full impulses in addition to the two chopped-wave tests for non self-restoring insulation systems such as transformer insulation. Statistical figures were presented comparing the IEEE C57.12.90 practice with the IEEE std. 4 and IEC practices. The actual IEEE C57.12.90 practice is fully adequate if the probability of withstand during impulse test is greater than 99% but does not permit to discard, in an efficient way, weaker units having a lower probability of withstand. Thus, the IEEE Std. 4 and IEC practices are more adequate to detect problematic transformers having a lower probability



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of withstanding its impulse rated values. The proposal will be surveyed, prior to the next meeting, within the WG and Dielectric Tests Subcommittee.

On old business, specific impulse test procedures regarding the phase-to-phase insulation are still on hold until the TF working on phase-to-phase insulation and air clearances finishes their work.

The meeting adjourned at 5:30 pm on October 6, 2008.

Pierre Riffon P. Eng.WG Chair October 6, 2008

8.6.2.3 Working Group for Revision of the Impulse Test Guides C57.98

and C57.138 – Art Molden, Chair; Joe Melanson, Co-Chair No working group meeting was held at Porto The latest draft of the guide was posted on the Transformers Committee web site earlier this year but only one response was received. Gustav Preininger provided an extensive list of technical and editorial suggestions and corrections, which I’m still working on. I will have them incorporated into a new draft by the end of the year. 8.6.2.4 Working Group on Liquid-Filled Transformers Dielectric Test

Tables – Phil Hopkinson, Chair; Scott Choinski, Secretary; Al Traut, Acting Secretary for meeting

Dielectric Test Tables, Liquid-Filled Porto Meeting October 7, 2008 1. Meeting convened at 2:45pm by WG chair Phil Hopkinson. 2. 51 in attendance, 22 members and 29 guests 3. Review of minutes from Charlotte Meeting. Minutes approved as submitted. 4. There are no patents that affect the work done in this WG. 5. Chair reviewed the present status of the test tables as incorporated in the

draft of C57.12.00 currently being balloted. 6. No further action required of the WG until the ballot is complete. Any

comments that need resolution will be addressed at the Miami meeting. 7. Meeting adjourned at 3:55pm. 8. Next meeting scheduled for April 2009 at the Miami Meeting, pending

comments resulting from the present C57.12.00 ballot.

8.6.2.5 Task Force on External Dielectric Clearances – Eric Davis, Chair The TF met on October 7, 2008, at 12:00 pm. Twenty-one people attended this second meeting, 8 members and 13 guests with one guest requesting membership.



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The IEEE patent disclosure requirement policy was discussed. Reference to the package posted on the IEEE Transformers Committee Web site was made. None of the members and guests present during the meeting was aware of any patents related to the work of this TF. The TF reviewed the progress in determining the technical basis of the clearances contained in CAN/CSA C88, IEEE C57.12.00, the NESC, NEMA TR-1 and IEC 60076-3. Roger Hayes reported that the CAN/CSA C88 clearances appear to be based on CAN/CSA C308, “The Principles and Practices of Insulation Coordination.” This standard provides three different formulas for calculating the critical flashover voltage based on various gap distances; < 2m, 2m – 10m and > 2m. These formulas will be posted on the Committee website. Loren Wagenaar had previously provided background information regarding the inclusion of the phase – phase clearances in C57.12.00. These values are based on a linear approximation of the work done by T. Udo. The NESC provides an alternate method of calculating the required external clearances in Section 232D. This method is based on the work of L. Paris and R. Cotina and is discussed in a 1972 paper by the IEEE Working Group 59.1, Transmission Substation Committee of the IEEE Substation Committee. The TF will continue to pursue the basis of the clearances in the tables. The TF is still tracking down information on the clearances contained in NEMA TR-1 and IEC 60076-3. The next step is determining how the various formulas were applied to create the clearances contained in the standards. The findings will be reported to the TF prior to the next meeting. After the meeting, Dennis Marlow agreed to be vice-Chair/secretary for future meetings 8.6.2.6 Task Force on Special Dielectric Test Issues – Bruce Forsyth,

Chair The Task Force on Special Dielectric Test Issues met in Porto, Portugal on October 6, 2008 at 2:45 PM. There were 46 people in attendance, 8 members and 38 guests, with 10 guests requesting membership, bringing the total membership to 34. The Chairman opened the meeting by briefly reviewing the minutes from the spring 2008 meeting in Charlotte, NC. The minutes were approved as written. The purpose of the TF, which is to make recommendations to the Chairman of the Dielectric Test Subcommittee regarding how to proceed with certain dielectric test issues, was reviewed before moving on to regular business. The first item of regular business was a review of the proposal to place front-of-wave test level information in the annex of PC57.12.00/D2c that is currently out



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for ballot. The TF had previously been asked to recommend a suitable place for this information and after some discussion the TF agreed that the annex of C57.12.00 is an appropriate location and that no further discussion of this issue is required. As a follow-up, the TF agreed that a panel discussion by industry experts on front-of-wave issues with specific emphasis on how the conditions modeled by front-of-wave tests can occur on an electric system, what effect these conditions may have on transformers, and how modern protective equipment can be used to protect transformers from these conditions would be beneficial. Therefore, by inclusion of this note in these minutes, the TF Chair shall recommend to the Subcommittee Chairman that such a panel discussion be arranged. The next item of business was a review of the current definition of Class I and Class II transformers. This was initiated as a result of the review at the last meeting of the responses to a survey that asked the following questions:

1. Should lightning impulse tests be made on all power transformers, regardless of voltage ratings?

2. Should the scope of Class II power transformers be extended down to include transformers with high voltage terminals of 69 kV, and if so, should the scope be extended to a voltage lower than 69 kV?

A long discussion took place after reviewing the current definitions of Class I and Class II power transformers as well as the current definitions of distribution and power transformers. It was mentioned that a new standard, C57.12.36, adequately addresses the requirements for distribution transformers rated up to 10 MVA with HV terminal ratings of up to 69 kV. One member noted that he had previously suggested the use of the terms “Class I” and “Class II” for power transformers should be abandoned in favor of the more general definition of “power transformer” given the existence of the new C57.12.36 standard. A poll of the meeting attendees did not show strong majority support for such a change. There was also discussion related to the additional tests required on Class II power transformers as compared to Class I power transformers, as well as discussions related to the design implications of including transformers in the Class II definition as opposed to the Class I definition. After more discussion, a proposal was made to extend the scope of Class II power transformers down to include transformers with high voltage terminals of 69 kV. This proposal received a strong majority support. Therefore, by inclusion of this note in these minutes, the TF Chair shall recommend to the Subcommittee Chairman that the scope of Class II power transformers be extended down to include transformers with high voltage terminals of 69 kV. A follow-up discussion regarding impulse testing of all power transformers took place. A proposal to perform lightning impulse tests on all power transformers, regardless of voltage ratings received a strong majority approval. Therefore, by inclusion of this note in these minutes, the TF Chair shall recommend to the Subcommittee Chairman that the necessary changes be made to make impulse tests routine for all power transformers regardless of voltage ratings. The final item of business was a review of a survey question regarding impulse testing of neutral terminals. It was noted that the current standards require



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impulse testing of neutral terminals rated 200 kV BIL and higher. In addition, it was reported that the IEC standard does not required impulse testing of neutral terminals that will be solidly grounded in service. A quick poll of attendees willing to vote showed no strong majority in favor or against routine testing of all neutral terminals. Many attendees abstained from voting. As time was running out the discussion was tabled for further review at the next TF meeting. There was no new business raised and the meeting adjourned at 4:00 PM. Respectfully submitted, Bruce Forsyth

8.6.3 Liaison Reports 8.6.3.1 High Voltage Test Techniques (HVTT), IEEE Standard 4 - Arthur

Molden Editorial work on the new revision of High Voltage Testing Techniques, IEEE Standard 4 continues and is now at the point where IEEE staff is reviewing the document. It is hoped that it will be ready for balloting next year.

. 8.6.4 Old Business 8.6.4.1 A tutorial on Dielectric Frequency Response Testing will be

scheduled for the fall 2009 meeting, and be sponsored by the Dielectric Test SC. A suggestion was made that this presentation will be presented first at the spring 2009 meeting in Bertrand’s WG on Low Frequency Tests. The Chair and Mark Perkins have enlisted 3 experts in this area to prepare the presentation. Equipment Supplier-Pax Diagnostics, Transformer Manufacturer-ABB and Utility-SCE (Don Kim). Note: The Chair mistakenly stated that Omicron was the equipment supplier at the meeting.

8.6.5 New Business

8.6.5.1 During discussion of a proposal from the floor at the Charlotte meeting of the main committee to eliminate Class I and Class II, the Chair of the main committee requested that SC chairs look at the effect of eliminating these classes. The Chair has consulted the latest proposal of C57.12.00, Class II transformers require the following routine tests whereas Class I transformers do not:

• Lightning impulse tests • Auxiliary/cooling power loss measurement • Winding insulation resistance • Power factor and capacitance • Core insulation resistance



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• Low frequency withstand tests on auxiliary devices, control and CT circuits

• Partial discharge measurements • Dissolved gasses in oil analysis • No-load losses and excitation test at 110 % of rated voltage • Zero sequence impedance.

The Chair asked all WG/TF chairs to look at the additional effects of eliminating the differences between class I and class II transformers.

8.6.5.2 Joe Foldi suggested that the SC consider specifying the tap position to be used during induced tests. The Chair referred this subject to the WG on Revision of Low Frequency Tests for its consideration.

8.6.6 Meeting adjourned 1:05 PM



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MINUTES OF THE MEETING OF THE HVDC CONVERTER TRANSFORMERS & SMOOTHING REACTORS S.C. IN PORTO, PORTUGAL, OCTOBER 4, 2008

8.7 HVDC Converter Transformers and Smoothing Reactors S.C R. Dudley The HVDC Converter Transformers and Smoothing Reactors S.C. met on October 4, 2008 at 12:00 p.m. in the Tamega Meeting Room of the Porto Palacio Congress Hotel, in Porto, Portugal. There were 14 members and 13 guests present. The following are the highlights.

8.7.1 Introductions were made.

8.7.2 IEEE patent policy was reviewed, and no issues were raised.

8.7.3 The minutes of the Charlotte meeting were approved. Note: The minutes of the Porto meeting will not be approved until the meeting of the

S.C. in Miami, Florida.

8.7.4 The Chairman briefed S.C. meeting attendees on the meeting of the Administrative S.C.

8.7.5 The remainder of the meeting focused on discussion of Draft #2 of the revision of IEEE 1277; including input received and distributed by SC/WG members prior to the meeting. The following are the highlights:

(i) Ugo Piovan made a short presentation on the work of CIGRE JWG A2/B4-28;

design review, oil conductivity (It was noted that IEC recommends that oil conductivity testing be carried out at a stress of .5kV/mm whereas the WG felt that it should be carried out at levels representative of the in-service stress of 10 kV/mm. What are the stress levels used in the ASTM test?). The documents/papers produced by CIGRE JWG A2/B4-28 will be referenced appropriately in the revision of IEEE 1277. Ugo Piovan will provide details, as they are available, to the Chairman.

Per Pierre Riffon, records are not usually kept regarding test stress level and

time for oil conductivity. In many cases, the oil used to fill the converter transformer or oil-immersed

SMR (including its conductivity) for testing is different from the oil (including its conductivity) used in service.

CIGRE JWG A2/D1 is specifically looking at testing of oil conductivity.



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2

A copy of Ugo Piovan’s presentation is attached to the minutes. (ii) The additional material for the annex on VSC based HVDC schemes drafted by

Lars-Erik Juhlin and Ulf Radbrandt will be further expanded upon by Lars-Erik Juhlin and Christoph Ploetner.

(iii) A brief informative annex on 800kV HVDC and the applicability of the standard

to smoothing reactors for such schemes will be drafted by Lars-Erik Juhlin and Christoph Ploetner. Basically the test methodology is applicable but test levels are in evolution and are specific project based.

(iv) The gassing limits under overload in Annex D will be reviewed by Lars-Erik

Juhlin and Christoph Ploetner re applicability to oil immersed HVDC SMRs as they were taken from IEEE C57.129 (converter transformers). It was noted that gas evolution can be from metallic structural elements as well as the insulation system. Clause D.2 “Overloading In Service” will be revised; including appropriate references to the IEC transformer loading guide.

(v) The switching impulse wave shape was discussed. Pierre Riffon proposed that

if the switching impulse wave shape could not be met then consideration should be given to performing a capacitor discharge test which is listed as OTHER. The crest voltage should be equal to the switching impulse crest voltage level. Performing a capacitor discharge test as a design test is preferable to increasing the crest voltage of the standard lightning impulse test which could over stress the insulation system etc. The capacitor discharge test can be performed using the capacitor bank for a synthetic test circuit or an impulse generator with the resistance removed. More information is required to be included in the revision of IEEE 1277 on how to perform the test; including dealing with the possible voltage overshoot.

Input is requested from SC/WG members. (vi) In Table 2 “short circuit verification” will be more appropriately called “short

circuit withstand capability verification”. Note 3 is OK. (vii) The Chairman requested that SG/WG members use Pierre Riffon’s editorialized

version of Draft #2 as the basis for any input. (viii) The Chairman stated that his objective was to produce Draft #3 in early 2009;

allowing plenty of time for the SC/WG to review before the Miami Meeting and then he would like to start the ballot process after the Miami Meeting of the SC.



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3

The Chairman thanked SC/WG members for their contributions to date, and the meeting adjourned at 1:15 p.m.

R. Dudley (08132)



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8.8 C57.13 Instrument Transformers – J. Smith – Unapproved Minutes

8.8.1 Chair’s Remarks & Announcements The Instrument Transformer Subcommittee met on Wed Oct 8 at 10:30 AM 6 members and 7 guests attended. The meeting was chaired by R. McTaggart The previous meeting’s minutes were approved as written and there were no Patent issues.

8.8.2 Working Group Reports

8.8.2.1 Working Group on Test Requirements for High Voltage Instruments Transformers Rated 115 kV and above

The WG met on October 7, 2008. Six (6) members and thirteen guests attended the meeting. The meeting was co-chaired by Mr. P. Riffon and Mr. Ross McTaggart.


Minutes of Charlotte meeting were approved as written.

The IEEE patent disclosure requirement policy was discussed. None of the members and guests present during the meeting were aware of any patents related to the work of the WG.

The first technical subject on the agenda was the discussion on Mr. Rolando Gomez's comments regarding dissolved gas content values. Since Mr. Gomez was not able to attend the meeting, the discussion has been postponed for a second time to the next meeting in Miami.

Comments received on the survey made within the WG and the Instrument Transformer Subcommittee on Draft 3 of C57.13.5 have been discussed and the following has been agreed upon:

• Three full impulses will be kept for the routine impulse test procedure but additional waveshapes comparison among the three full impulses will be required in case where the comparison with the reduced impulse shows small differences or when this comparison is not available in case of multiple identical units to be tested for which the application of a reduced impulse wave may be waived.

• Nominal and maximum system voltage values will be changed to usual IEEE nominal and maximum system voltage values. Actual edition of C57.1.3.5 is using IEC system voltage values.



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• External RIV values came from former NEMA values. Values will be kept as they are for the next edition.

• References to pressurized electrical equipment enclosures will be moved to a new Bibliography section. There is no specific US standards concerning pressurized enclosures for electrical equipment. Applicable CENELEC "EN" standards will be added as additional informative documentation about pressure vessels used in electrical equipment not containing corrosive gas such as oxygen and/or water.

• Maximum permissible initial level for acetylene (0,5 p.p.m.) will be kept as stated in the first edition since some residual acetylene may be seen in oil even after oil treatment.

Since no negative ballots have been received during the survey made on D3, D4 will be prepared and will take in consideration the decisions made during the meeting. D4 will then be sent to IEEE for an official ballot.

8.8.2.2 PAR P1601 Optical Current and Voltage Sensing Systems - F. Rahmatian (TC/ITSC) and H. Gilleland (PSIM)

This WG did not meet in Porto

8.8.3 Old Business

8.8.3.1 C57.13 Revision A number of the members comments were reviewed before running out of time. The key points were that the accuracy classes should include those in C57.13.6 and that there should be 4 test points. It was proposed that the 1.2 and possibly 0.6 class should be eliminated. It was also noted that there are no protection classes for VT’s. Vladimir Khalin volunteered to rewrite 8.1.10 (Calculation of current transformer ratio by the algebraic method) and to revise 8.9 (Measurement of open-circuit voltage of current transformers) by the next meeting. There was disagreement about whether the C57.13.5 test values should be put into the next revision. Some felt that the customer should have the choice of specifying C57.13 with less stringent testing or C57.13.5 with more stringent testing. This issue needs to be resolved before we go much further.

8.8.4 New Business Partial Discharge Testing

The following points were discussed: • C57.13 has very low requirements & little detail • C57.13.5 has requirements similar to IEC but no test ckts or detailed methods • IEEE C57.113 presently applies to Transformers & Shunt Reactors only • Any PD Standard developed or referenced should apply to CT’s, VT’s & Combined Metering Units – either general or specifically covering all • Agreed that test levels should remain in Product std (C57.13 & 13.5)



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• Options are: 1) separate document 2) expand scope of C57.113 3) Include in C57.13

• Proposal for TF to study & determine best approach – accepted by the attendees • Thang Hochanh will chair TF under SC Dielectric Tests • Lorin Wagenaar will arrange for a time slot which does not interfere with other Instrument Transformer meetings

8.8.5 Adjournment The meeting was adjourned at 11:55 AM



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UNAPPROVED MINUTES (Draft 1, 10-28-08)

SC Insulating Fluids Meeting October 8, 2008 - Oporto, Portugal

8.9. Insulating Fluids Subcommittee (R.K. Ladroga, Chair; S.J. McNelly, Vice-Chair)

8.9.1. Introduction/Attendance

The Insulating Fluids Subcommittee meeting in Porto, Portugal at noon on Wednesday, October 8, 2008 was called to order at noon by Vice-Chair Susan McNelly. Secretary Patrick McShane was also present. There were 17 members and 21 guests present. The following 5 guests requested membership:

1. Claude Beauchemin 2. Edwardo Garcia 3. Martin Navarro 4. Jim Antweiler 5. Michael Lamb

Meeting Agenda 1. Introductions 2. Patents 3. Spring 2008 Minutes Approval 4. WG Reports

a. WG C57.147 – Natural Based Ester Fluids – Patrick McShane b. TF DGA in Natural Based Ester Fluids – Paul Bowman c. WG C57.139 – DGA in LTCs – Fredi Jakob d. WG C57.104 – DGA in Oil Immersed Transformers – Richard Ladroga e. TF Guide for Retrofill of Natural Ester Fluids – Jim Graham f. C57.130 - IEEE Trial-Use Guide for Dissolved Gas Analysis During Factory Temperature

Rise Tests 5. New Business

Particle Count limits 6. Old Business 7. Adjourn

Introductions of the meeting participants were made.

8.9.2. Approval of Meeting Minutes and Patent Disclosure

As required the IEEE patent disclosure requirements were discussed and a request was made for disclosure of any patents that may be related to the work of the subcommittee. No new disclosures were forthcoming.

The Minutes of the Spring 2008 Charlotte, North Carolina meeting were approved as written.



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8.9.3. Current Subcommittee Business

8.9.3.1. C57.147 - IEEE Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers

No meeting was held. This standard has successfully gone through the ballot process, approved by the IEEE SA Standards Board, and was published on July 11, 2008. Thus, the WG has been terminated.

8.9.3.2. TF DGA in Natural Based Ester Fluids

Tuesday, October 7, 2008 Task Force Natural Ester Fluid DGA Guide Development Chairman Paul Boman Porto Portugal, October 7, 2008 at 10:30 am Attendance; Total attendees 44, 9 Members, 35 guests with 1 requesting membership

1. Introductions

a. John Luksich, Cooper Power Systems was absent from the meeting so Patrick McShane acting secretary for John Luksich

2. Patent Disclosures: None

3. Spring 2007 Charlotte NC Meeting Minutes were approved without comment or discussion.

4. Nov. 2007 IEEE Electrical Insulation Magazine Article “Dissolved Gas Analysis of Alternative Fluids for Power Transformers” was discussed for comparison to recent EPRI testing.

a. The ability to diagnose Natural Esters with exception of key gases. Dave Hanson, TJH2b, commented that ethane might be a gas that is being different. Russell Martins mentioned that the University of Manchester study and CIGRE study also showing ethane higher ethane level it with different esters, perhaps due to double bond meeting up with hydrogen, the ethane higher ethane level it with different esters. Mark Scarsbourgh shows slow build up then levels out for both Hydrogen and Methane.

b. Dave Hanson, TJH2b, discussed the DGA results.

c. Republished article with corrections or additions copy should be posted on Internet site.

5. EPRI Natural Ester Testing Project Update

a. Patrick McShane, Cooper Industries, filling in for Luke van de Zel, showed key slides from the current (through Sept) testing done for EPRI by Power Tech lab.

b. Comments regarding DGA results

i. The results also show higher methane for most of the tests compared to mineral oil methane levels.

ii. Fredi Jacob, Weidmann, No ethylene but high hydrogen gas concentration noted. Speculated that reaction taking place.

iii. Several slides titled wet paper, no note for the amount of wetness.



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iv. Natural ester gassing tendency much lower than mineral oil.

v. Discussion about partial discharge testing

6. Partial discharge testing thought to have been tested at 20C to 24C

a. Recommend to EPRI to test between 50C to 80C.

7. Natural ester could not determine point when partial discharge advanced to arcing.

a. Speculated due to viscosity or gassing tendency

b. EPRI expects to complete the current Phase II study this year. They are soliciting from the Industry what studies would be recommended for Phase three, not limited to DGA.

i. Partial discharge testing temperature range 50C to 80C

ii. Relative solubility to temperature for DGA gasses.

iii. Include other manufacturers in project

c. The partition coefficients values show some disagreement between IREQ and Power Tech values for the same natural ester (70C).

8. The partition coefficients values show some disagreement between IREQ and Power Tech values for the same natural ester (70C).

9. TF chair asked can the differences be significant between different natural esters fluid products?

10. Clair Claiborne, ABB, showed results of study by IREQ for a different type of natural ester at 70C comparing to the study done earlier on the fluid being tested in the EPRI study.. The values also showed close correlation for most, but not all, gases.

a. Determine if the current mineral oil insulating fluid evaluation tools are sufficient to evaluate natural ester fluid DGA or if a new guide is required.

11. Any field experience with abnormal or fault? No committee response

12. Future plans

a. Analysis of EPRI data using current mineral oil tools for presentation to Spring 2009 meeting

b. Make determination if enough information is available to issue a recommendation to subcommittee for a while paper or DGA guide.

A motion for adjournment was received from Joe Kelly, S.D. Myers, and seconded by the committee

8.9.3.3. C57.139 - Draft IEEE Guide for Dissolved Gas Analysis Of Load Tap Changers

Tuesday, October 7, 2008 Porto, Portugal



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Minutes of WG Meeting

Fredi Jakob called the WG meeting to order at 12:05 pm, Tuesday, October 7, 2008. WG Secretary Susan McNelly was also present. There were 17 members and 30 guests present with 4 guests requesting membership. Guests requesting membership were: 1. Frank Damico 2. H. Jin Sim 3. Clair Claiborne 4. Karsten Viereck Meeting Agenda: 1. Welcome 2. Introduction 3. Patent Disclosure 4. Approval of Minutes from Spring 2008 Meeting 5. Review of Draft 9.1 of the guide 6. New Business 7. Adjourn

1. Introductions of the participants were made.

a. The IEEE Patent disclosure requirements were discussed and a request was made for disclosure of any patents that may be related to the work of the WG. There were no responses to the request for disclosure.

2. Approval of minutes from the Spring 2008 meeting in Charlotte, North Carolina was requested. The minutes were approved as written.

3. Review of Draft 9.1 of the guide:

a. Information from Jim Dukarm on the LTC DGA samples was presented by the Chair.

b. The following commentary was provided by Jim:

i. For the gas concentration norms, the left one is the C0.95 norm as derived in Addendum A. The right one (enclosed in parentheses) is the corresponding outlier rejection limit U. See the text at the end of the gas concentration norm 'recipe' for some discussion of these.

ii. In Example 1, both the ethylene/acetylene and the hot-metal/acetylene ratios are normal right up to the last sample shown, where they have extreme values. In this example, the gas concentrations are so low in all but the last sample that the gas ratios would have been meaningless.

iii. In all samples, gas concentrations were well below their respective limits.

iv. In Example 2, the gas ratios remain low and relatively constant in all samples. The ethylene, total hot metal gas, and acetylene all become noticeably high in the last two samples. Here we notice the usefulness of the advice given in the statistical Addendum where it is stated that if the percent-point limit C0.95 for a combustible gas is drastically higher than the outlier rejection limit U, then U should be considered for use as the caution limit for that gas.

c. The following comments from Jack Harley were discussed:



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i. Comment 1: The gas levels discussed at the last meeting were quite high. Explosion level for acetylene in air is 2.5% or 25,000 PPM. Should there be a safety warning about C2H2 and the hot metal gases when readings get this high?

1. TV indicated that it would be good to have a statement in the guide. Tom Prevost indicated that if you do, that you would need to set limits. The guide is for diagnostics. Comment from Dave Hanson was that anytime you are handling the fluid you need to be aware of the concern.

2. Fredi Jakob asked for a motion. TV Oommen proposed that a safety warning be included. There were inclusive results from the vote. Fredi explained that setting limits would be difficult as individual gas limits would be meaningless. Jack Harley asked the question of whether as the typical user would know that there was a risk of opening a unit with this type of concentration of acetylene. He was in favor of some type of warning.

3. Fredi indicated that a reference to the sampling guide be made. Beauchemin indicated that he didn’t feel this resolved the issue of the safety issue. Fredi asked Jack and Claude to propose some wording for the document. Jin Sim requested that they contact Paul Griffin from Doble for more information.

ii. Comment 2: What is the effect of gas solubility in oil on the readings? For example, if a field chromatograph is being used in the gas space, will the readings be the same as in the oil? And is there a saturation level for C2H2 or the hot metal gases in oil?

1. Fredi Jakob indicated that the answer to this is no. There won’t be any agreement. The answer to the second part of Jack’s question is yes, there is a saturation level, but it is very high and would never happen. Jack indicated that the new automated methods of taking samples may be in the head space. Fredi indicated that most look at the gas-in-oil. A total combustible would be the only

iii. Comment 3: A sample spread sheet showing the formulae in the cells would be very helpful.

1. Fredi will ask Jim Dukarm w provide the spreadsheet in the document.

iv. Comment 4: from Vijayakumaran Moorkath:

1. “This standard is applicable only for oltc operating in mineral oil. There are LTCs operating in silicone oil and also natural ester. Are we planning to have a separate standard for these applications? Further, it is mentioned in cl.1.1 Scope, that the evaluation criteria is for mechanical damage or failure. I think the DGA should indicate initiation of dielectric failure of insulation components in diverter switch.”

2. Response from Fredi Jacob: No, we will not be addressing silicone or natural ester fluids in this guide. It is too late to change the scope and they will have different values just as in the main tank. Regarding

d. The latest draft, 9.1, was reviewed section by section with additional changes identified to be included in the next draft 10. The following items need to still be addressed:



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i. Clause 6.3.1 – Question on where did the code come from. Provide reference.

ii. Add THG and Hot Metal Gases to the list of definitions in clause 3.

e. Fredi reviewed the case histories document.

The meeting was adjourned at 1:15 pm.

Fredi Jacob

Chair

Susan McNelly Secretary

8.9.3.4. C57.104 – IEEE Guide for the Interpretation of Gases Generated in Oil – Immersed Transformers

Tuesday, October 7, 2008 Porto, Portugal

The meeting was called to order by Vice Chair/Secretary, Susan McNelly at 3:00 pm on Tuesday, October 7, 2008. Chair Rick Ladroga was not able to attend. There were 28 members, 35 guests, and 7 guests requesting membership.

Guests requesting membership were: 1. Van Nhi Nguyen 2. Cui Yuanzhong 3. Larry Weathington 4. Robert Ganser 5. George Kennedy 6. Robert Thompson 7. Frank Damico

1. Approval of minutes from the Spring 2008 meeting in Charlotte, North Carolina was

requested. The minutes were approved as written.

2. The IEEE Patent disclosure requirements were discussed and a request was made for disclosure of any patents that may be related to the work of the WG. There were no responses to the request for disclosure.

3. Due to a late start, introductions of attendees were not made.

4. Update on status of recent ballot on C57.104:

a. PC57.104 was approved as a revision standard by the IEEE-SA Standards Board on 26 September 2008. Thanks are extended to the WG and the ballot resolution committee (Ladroga, Prevost, McNelly, & Beauchemin) for helping get this document through the approval process.

5. New Guide: A new PAR request will need to be filed to start over with an immediate revision to the guide to address the remaining issues that have been raised as soon as the ballot process with the existing document is complete. Tom Prevost indicated that before a PAR can be submitted there will be a large effort required to determine the Scope and



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Purpose paragraphs for the new guide. The goal will therefore be to have a draft of the project scope and purpose sent out prior to the next meeting for review and comment.

6. Status reports from Task Forces:

a. Framework

Jim Dukarm - Chair Tim Raymond Dave Hanson Jim Graham

No further progress until a more detail direction from the scope and purpose can be made.

b. Data:

Norman Field – Chair Claude Beauchemin Dave Hanson Jim Dukarm Paul Boman Dave Wallach Paul Mushill Jim Graham Bob Ganser Jr Joe Kelly Tom Prevost i. Norman Field called in with a presentation on the data that has been collected to date

(22000 records). After the meeting, Matt Kennedy from Doble indicated that he had previously submitted 48000 records, but that he would forward that data to Norman. The presentation provided by Norman is included below.

ii. During the Charlotte, NC meeting five additional people offered to help: -Shawn Galbraith - Brian Sparling -Matthew Lawrence - Shuzhen Xu -Andre Lux

iii. Norman indicated that if these 5 or any others would like to become TF members to please contact him at [email protected].

c. Data solicitation: i. Each TF member received a solicitation for transformer DGA data

ii. In addition, a list of “Essential” transformer information to accompany the DGA data was proposed

iii. To date, one member has provided feedback and DGA data. TF Chair will follow-up with all TF members shortly after Porto meeting.

iv. “Essential” Transformer Data: –Type (GSU, SubStn, Auto, etc.) - Manufacturer –No. of phases - Year of Manufacture –MVA - Serial Number –HV Voltage / BIL - Oil Volume –Rated temperature rise - Oil Preservation System –Coolant type (Mineral oil, Silicone fluid, etc.) –Reason for sampling

** The above is open to suggestion ** v. Fluid Sample Info to Accompany DGA:

–Date Sampled –Fluid Temperature –Date DGA Performed



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d. Data received: i. Dave Wallach of Duke Energy has provided transformer DGA data along with all

“essential” data fields –32,000+ DGA samples –3,400+ transformers

ii. This data is available to the C57.104 Working Group.

e. Data Analysis: i. For comparison to the infamous Table 1 of C57.104, the data population was

analyzed with respect to percentile values. ii. The Duke Energy dataset was filtered as follows:

–Removed mobile transformers –Removed xfmrs with top rating < 10,000 kVA –Reason for sampling was provided for most samples. As such, removed DGA samples:

• Taken immediately after degassing • Taken due to a “Trip” or “Equipment Failed” alert

(Remember: This DGA population is meant to represent xfmrs in service without a failure.)

iii. The filtered Duke Energy dataset represented –22,000+ DGA samples –1,500+ transformers

iv. Each gas (H2, CH4, C2H6, C2H4, C2H2, CO, and CO2) has a probability distribution that follows a LOG-NORMAL distribution.

v. For this reason, the data was analyzed using the method described in the latest Draft of C57.139 – Interpretation of LTC DGA.

vi. Summary of Dissolved Gas Percentile Points

f. Further work: i. More DGA data is needed. (note from Susan McNelly – After the meeting

adjourned, Matt Kennedy from Doble indicated that he had previously provided 48000 data samples for use. The information was apparently misplaced and he will resend the information directly to Norman Field.)

ii. Jim Dukarm is working on developing statistically meaningful methods to diagnose gassing rates.

g. Comments after the presentation: i. Tom Prevost indicated that the phenomenon of oil-to-paper ratios need to

addressed since transformer size has been an issue during past discussion on revisions to the guide. Norman indicated that the oil quantity is easy to obtain, however the paper quantity would be difficult to obtain.

ii. TV Oommen asked if there was a way to sort out the data to determine what quantity of units in the data set had faults and what type. Norman indicated that this information was available for the data submitted to date.



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iii. Claude Beauchemin asked if the type of preservation system is known. Norman indicated that this information is available and will be important, especially for the CO and CO2 ratio. Robert Thompson commented that until recently the Duke units above 10MVA were all free breathing conservator units.

iv. Robert Thompson asked if the moisture levels were captured in the data. Norman indicated that the information was available, but that it was not used to filter the data.

v. Catherine Hurley requested that a form for the required data be provided on the web so that additional data provided would include all of the needed information.

h. Case Studies:

Brian Sparling –Chair Jim Graham Kent Haggerty Paul Boman Dave Wallach Bob Ganser Jr. Dave Hanson Paul Mushill Tim Raymond Joe Kelly Norman Field

No report at this time.

i. Diagnostic Methods

Tim Raymond – Chair Lance Lewand Michel Duval Joe Kelly Jerry Corkran Norman Field

No report at this time.

The meeting was adjourned at 3:40 pm.

Susan McNelly WG Vice Chair and Secretary

8.9.3.5. TF Guide for Field Application of Natural Ester Fluids Tuesday 10-7-08 4:15 – 5:30 Jim Graham Chair Patrick McShane (Acting Secretary)

Introductions and Attendance Sheets Patent Disclosure – None Disclosed Approval of Task Force Report from 18 March, 2008 Meeting – Approved

Document Title: Guide for Field Application of Natural Ester Fluids

Chairman: James Graham

Vice Chairman: Jerry Murphy

PAR Status: In development

Current Standard Copyright: IEEE NEMA OTHER

Current Draft Being Worked On: Draft 1 Dated: March 2008

Meeting Date: 10/07/2008 Time: 4:15 – 5:30 PM

Attendance: There were 5 members, 27 guests, and 5 guests requesting membership.



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1. The meeting was called to order at 4:25 PM, introductions were made, and an attendance roster was circulated. The chair asked the group if there were any patents that needed to be disclosed. None were announced to the group. The task force report from the Spring 2008 meeting was reviewed and approved.

2. The task force schedule was discussed briefly. There was a short discussion regarding the type of document the task force should recommend, a standard vs. a guide. The task force members will be polled for a consensus decision prior to submitting a recommendation to the subcommittee. The intent is to submit a PAR for subcommittee and main committee consideration prior to the next transformer committee meeting.

3. The proposed scope and purpose were presented and reviewed for additional comments. Most of the comments centered on the types of equipment to be covered by the document. The consensus is to revise the scope to include a broad range of equipment without listing specific types.

4. The need for a condition assessment guide to help to determine if it is reasonable to retro fill a mineral oil immersed piece of equipment with natural ester fluid. The chair took this under advisement.

5. It was suggested he document include a statement regarding the proper disposal of the fluid at the end of its useful life, but defer to appropriate regulatory agencies for specifics.

6. Other topics discussed to consider in the guide, included a. NE fluid applications (the do's and don'ts of using NE fluid) b. New equipment fluid filling procedures c. Retro filling procedures d. Post fill procedures for both new filling and retro filling e. Cold start issues f. Radiator and cooler issues g. Operational impacts related to field testing h. Transportation and storage requirements for natural ester fluids

7. A call for volunteers was issued to research existing documents relating to mineral oil and alternative fluids for possible reference. Russell Martin CIGRE TF Chair offered to share documents on alternative fluids they have found. Martin Alsina Navarro, Siemens Brazil has a collection on alternate fluids to share. The meeting adjourned at 5:30.

8.9.3.6. C57.130 - IEEE Trial-Use Guide for Dissolved Gas Analysis During Factory Temperature Rise Tests for the Evaluation of Oil-Immersed Transformers and Reactors

There was no WG meeting for this Guide at the Charlotte, North Carolina meeting. A request for a PAR extension for this Guide was granted. The PAR expires the end of 2009. Tom Prevost would like to form a ballot resolution committee to resolve the outstanding ballot comments. Kent Haggerty, Dave Wallach, Juan Castellanos, Rick Ladroga, and Tom Prevost have volunteered to serve on the ballot resolution committee. There were 60 total comments with about 10 negatives that will need to be addressed.

Joe Kelly indicated that in the meantime there have been Canadian and IEC documents that have been created that may be helpful in resolving the negatives.



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8.9.3.7. 637 - IEEE Guide For Reclamation of Insulating Oil and Criteria For Its Use

No meeting was held in Oporto for this Guide. IEEE Std 637 –The Reaffirmation approved by SA Board 9/27/2007, which expires on 12/31/12.

8.9.4. Old Business

None

8.9.5. New Business

Item 1: Patrick McShane brought up the fact that it has recently come to his attention that some Medium and Large Power OEM have specification on limits for particulate in dielectric coolants, as received and in oil in new transformers. However, there appear no known standard limits set for transformer fluids by ASTM, IEC, or IEEE. After discussion, a motion was made and passed to form a Task Force to investigate the issue and determine if there is a need to develop a standard for particulate limits for new fluid, as received in new equipment, and continued use. Mark Scarsbough volunteered to chair the TF.

Item 2: Bob Rasor of SDMyers proposed to create a new TF to study moisture levels as related to transformer power factor readings. While C57.106 has limits on moisture level (in ppm) for mineral oil, and by extension C57.152, they do not address temperatures and relative saturation. This issue came up in the C57.152 WG (Field Test Guide) meeting and was also discussed in a paper presented by Jin Sim in a TF under the Insulation Life SC at this Fall 2008 Transformer Committee Meeting. This task force recommended that the issue belonged with the Insulating Fluids SC not the Insulation Life SC. Tom Prevost made a motion that a TF be created under the Dielectric Fluids SC to review this issue. The motion carried and a call for volunteers was made. The following meeting attendees volunteered to serve on the TF:

• Claude Beauchemin, • Paul Boman • Matt Kennedy • Hali Moleski • Don Platts • Bob Rasor

Item 3: William Bartley advised that C57.111 Guide for Silicone was due to expire and withdrawn on 12/21/08. A request for WG volunteers was made. There were no volunteers. (PostScript: After the meeting Paul Boman volunteered to be the WG Chair and Paul has begun the reaffirmation process)

Item 4: The need for an Ad Hoc committee was discussed regarding the determination of what, if any, existing and current TC standards projects need revision to include (or specifically to exclude) alternative dielectric fluids. Another issue is to determine that all TC standards have consistent references to each type of insulating fluid. (PostScript: Immediately following the SC meeting, an informal Ad Hoc meeting was held by several interested parties. At the recommendation of Tom Prevost, volunteers were assigned to review all transformer standards to determine and list those that include references to specific, or in general, to dielectric fluids. A report on the findings and recommended action is to be written and presented at the next meeting of the TC Standards Committee.)

8.9.6. Adjournment

The Subcommittee adjourned at 4pm.

Next Meeting:



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The Insulating Fluids Subcommittee and its Working Groups will next meet in Miami, Florida in March 2008.


Richard Ladroga Fluids SC Chair

Susan McNelly Fluids SC Vice-Chair

Patrick McShane Fluids SC Secretary



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Annex to Insulating Fluids SC Report F08

Draft 7

TASK FORCE TITLE:

Guide for Field Application of Natural Ester Fluids

SCOPE:

This guide recommends procedures for the field use of natural ester fluids in liquid-immersed equipment.

This shall include but not be limited to distribution transformers; regulating transformers; generator step up and unit auxiliary transformers; network & submersible transformers; phase-shifting transformers; voltage regulators; shunt reactors; and associated components requiring insulating fluids.

This guide is not intended to determine the suitability of this fluid in specific transformers.

PURPOSE:

The purpose of this guide is to provide users of liquid imersed equipment with information for the application of natural ester fluids as an insulating medium. This will include field procedures for filling new equipment and retrofilling existing equipment with natural ester fluid.

NEED:

The use of natural ester fluids as an insulating medium in liquid-immersed equipment is increasing. Detailed knowledge of the handling and testing of natural ester fluids is not widespread among users.

STAKEHOLDERS:

Stakeholders in this project include utilities, industrial, government agencies & commercial users, transformer & component manufacturers, field service organizations, repair facilities, remanufacturers, and suppliers of natural ester fluids.



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1

Insulation Life Subcommittee - Unapproved Meeting Minutes October 8, 2008 – Porto, Portugal

8.10 Insulation Life Subcommittee – Don Platts, Chairman The Insulation Life Subcommittee met in Porto, Portugal on October 8, 2008 at 8:00 AM. The minutes of our meeting in Charlotte, North Carolina on March 19, 2008 were approved as written. 8.10.1 Chair’s Report The Spring 2009 IEEE Transformers Committee Meeting will be held in Miami, Florida in April. The Fall 2009 meeting will be held in Lombard, Illinois in October. 8.10.2 Project Status Reports 8.10.2.1 Reaffirmation Ballot C57.119, IEEE Recommended Practice for Performing

Temperature Rise Tests on Oil-Immersed Power Transformers at Loads Beyond Nameplate Ratings

REVCOM approved the reaffirmation of C57.119. 8.10.3 Working Group and Task Force Reports 8.10.3.1 Working Group for the Revision to C57.91 Loading Guide - Tim Raymond The working group was called to order by Don Platts standing in for absent Chair, Tim Raymond, and Vice Chair Carlo Arpino at 10:40 AM on Tuesday, October 7, 2008. Secretary Susan McNelly was also present.

There were 23 members present and 30 guests with 4 guests requesting membership to the WG. Guests requesting membership were:

Kirk Robbins Amitav Mukerji Abderrahmane Zouaghi Oleg Roizman

Agenda: 1. Introductions 2. Minutes approval and patent announcement 3. Comments to latest revision 4. Plans for Completion 5. Adjournment

Introductions of members and guests were made.



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2

Approval of minutes from the Spring 2008 meeting in Charlotte, North Carolina was requested. The minutes were approved as written.

The IEEE Patent disclosure requirements were discussed and a request was made for disclosure of any patents that may be related to the work of the WG. There were no responses to the request for disclosure.

Comment review:

Comments were received comments from the following to the latest draft 5.1: –George Frimpong –Luiz Cheim –Malcolm Thaden –Bipin Patel –Oleg Roizman –Don Platts

A special thanks was extended to those who took the time to comment.

General Comments • The terms “55C rise” and “65 rise” are loosely used in the document. Use “55C rise

rating” and “65C rise rating” for clarity.

• Unless there is a specific need we should avoid making reference of IEEE/ANSI standards by specific year and subclause #. Otherwise every time a referenced standard is revised we will have to revise this guide.

• The terms “loading in excess of nameplate”, “loading above nameplate”, “loading beyond nameplate” and “nameplate rating” v/s “nameplate” within these terms mean the same thing but a consistent use of terms will be helpful. Any suggestions?

Will verify that there is no standard way of referring to this in the standard definition guide. If not, will us the same terminology that is used in C57.119 which uses “at loads beyond nameplate ratings.”

• Equation numbering, figure numbering, etc. needs to be fixed.

The entire guide will be converted to the IEEE style template. These items will be fixed during this process before the next draft is sent out.

Clause 2.1 – Purpose:

• The wording implies that the sole purpose of the guide is to address loads in excess of nameplate rating. I think it should be something like this: “The purpose of this guide is to establish guidelines for loading transformers. Applications of loads in - - - risk. The purpose of the guide is also to identify these risks and to establish - - - level.”

Comment provided by Tim Raymond - I don’t think that we can change the wording at this time. Certainly Scope cannot be changed.



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3

Discussion in the WG indicated that while the scope can be changed, it requires a PAR revision and is not desirable as the PAR expires at the end of 2009 and the document needs to move along.

Clause 4 – Nomenclature:

• Malcomb Thaden indicated that the nomenclature list is very useful in a standard like this and that he finds himself going back to it.

• Bipin Patel indicated that the nomenclatures are already included locally throughout the document as needed. Having them here also duplicates the efforts. It adds extra burden of making sure that all symbols and suffixes are included and consistent. On the other side having them here all at one place helps find a particular symbol or suffix when applying them. His vote was for not including them in this location.

The WG discussed the usefulness and location of these definitions. Many agreed that it was useful to have a listing of all of the terms used in the formulas throughout the document. The IEEE style guide requires that they be located by each formula so not having them with the formulas does not appear to be an option. Therefore, after much discussion, the consensus was that there is a need for a listing of all of the definitions in one location. However, it may be more appropriate to put them in an informational Appendix or Glossary at the end of the document. If this is done, Figure 1, which also needs to be revised as there are errors as a result of past draft translations, would need to be kept with the overall list.

Clause 5.2 – Load Current, voltage, core excitation, and frequency considerations

• Add: c) The load current shall be approximately sinusoidal. The harmonic factor shall not exceed 0.05 per unit. Harmonic factor is defined in IEEE Std C57.12.80.

Response from Tim Raymond – The wording in this Clause was taken from C57.12.00, which did not have c). However, we should recognize that loading under non-sinusoidal loads is not within the scope of this Guide.

The general consensus was that there should be a reference added to this clause to C57.110 instead of adding an item c. Also, the guide needs to make sure it clearly indicates that it is intended for use for sinusoidal loads. Users should refer to C57.110 for non sinusoidal loads.

Clause 7 - Thermal Evolution of Gas from Transformer Insulation

• Comment that the statement “The risk of failure decreases when no insulation collars are used in highly stressed parts of the transformers with reduced BIL insulation systems.” may not be true.

Tim Raymond recommended that the sentence be removed and that the section could use some qualitative “fleshing out.”



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4

The general consensus in the meeting was that the sentence made no sense and should be removed. Tom Prevost volunteered to take a look at revising the section with TV Oommen’s help.

Don Platts indicated that he was also not sure that item 2 in this clause belongs in the guide. This will also be reviewed in the revisions to be done by Tom and TV.

Clause 9 – Information for loading calculations:

• Under “More precise calculations of loading capability may be performed if desired if the following additional information is also provided” add “top-of-duct oil rise at rated load (from design calculations).”

There was no discussion and no comments during the meeting on this item

• To perform calculations for under and over excitation, core loss test results should be requested for excitation levels of 90 to 110 per cent in 5 per cent steps.

Comment: Dick Amos – Why not just ask for an excitation curve?

Comment: Joe Foldi – Under load there is regulation and flux in the core that is not the same as under no load conditions. Usually this is done at 90, 100, and 110%. Joe indicated that he was not sure that the 5% steps were necessary.

General consensus was that the additional steps were not necessary and were not in favor of making this change.

Clause 9.4 – Calculations of rated losses at power level of loading:

• The multiple sets of subscripts (R, MVAl and MVAL) is confusing. The intent of this section is to explicitly describe the conversion of the measured losses (usually reported at the self-cooled rating) to the MVA rating for which the heat run was conducted. Somehow, this should be made more clear.

Don Platts indicated that there seemed to be some confusion on the use of the 2nd suffix “R” with the 3rd suffix. There were no specific comments, so this will be highlighted for review in the next revision. Don Platts will also further review this item.

• Before Eq 7 we state that the ohmic losses can be calculated from the winding resistances. We don't have symbols for this, but perhaps should state that the winding resistance from the test report must be multiplied by the square of the winding current (particularly important for autotransformers).

There was no discussion and no comments during the meeting on this item



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Top-of-duct oil rise:

• “For the ONAN, ONAF, and ODAF cooling modes, the winding duct top oil temperature at rated load, ΘTDO,R is assumed equal to the tank top oil temperature. Then the duct oil rise over bottom oil is (33A)”

Tim Raymond indicated this needs better clarification. The assumption is not as simple. For this to be true one must assume that all windings (HV, MV, LV) have the same longitudinal temperature gradients (rarely true) and one cannot neglect the core influence either. Notice that the longitudinal gradient measured during heat-run test is under “total losses” and not the effective losses of individual windings. While he agreed that the top of duct oil rise will not generally equal the bulk top oil rise, the assumption is consistent with assumptions we have made to date. If manufacturers are able to supply a more correct number, great. In the absence of this, the approximation (for other than OFAF) is reasonable.

The general consensus of the group during the meeting was that the top-of-duct oil rise information is normally available from the manufacturer and should be requested.

Plan for Completion:

1. Make editorial changes to fix numbering, etc. as soon as possible and circulate a “semi-final” draft for comments.

2. Submit for editorial review to prepare for balloting.

3. Barring major objections, submit the document for ballot by next meeting.

The meeting was adjourned at 11:45 am.


Don Platts for Tim Raymond (WG Chair) and Carlos Arpino (WG Vice Chair) Susan McNelly – WG Secretary 8.10.3.2 Working Group On Thermal Evaluation Of Power And Distribution

Transformers (C57.100) – Roger Wicks 8.10.3.2.1 Introduction and Rosters The working group met on Monday, October 6, 2008 at Noon with 16 members and 54 guests attending, with 3 guests requesting membership. This brings the number of members to 75. 8.10.3.2.2 Approval of minutes from March 17, 2008 meeting The minutes of the March 17, 2008 meeting in Charlotte were approved as written. 8.10.3.2.3 Patent Disclosure



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The chairman asked if anyone knew of any patents that could pertain to this project. There were none. 8.10.3.2.4 Discussion of DuPont-Weidmann test of power transformer model. The chairman gave a presentation to the working group of the dual temperature aging model. He first provided background information on the following subjects:

• Dry Aging data vs. C57.91 life curves (non-upgraded) • Aging data for “dry” insulation for 4 different paper types. • Dp vs. Tensile strength correlation • Comparison of Dp 200 life vs. 50% tensile life curves • Furan Data vs. Dp (upgraded vs. nonupgraded)

He then provided updated information for the working group on the following subjects:

• Moisture aging for non-upgraded paper showing a clear response vs. moisture content (ranging from 0.5 to 2% moisture)

• Nearly complete life curve which has data very similar to the C57.91-1981 life curve for non-upgraded paper (98C vs. 94.5C)

• Moisture aging for 1.7% upgraded paper showing a significantly reduced effect of moisture (at 0.5%)

• Nearly complete life curve with data different than C57.91-1981, but with a 112C life prediction vs. 110C prediction at 180,000 hours.

The chair then again solicited any input from the audience for any aging data from the past (especially the original Lockie test data) so we can compare how the data was interpreted, extrapolated, etc. Don Platts mentioned that in the Annex I of C57.91-1995, there is a description of how the Lockie data was applied “historically”. The chair will review this information and determine other sources of information as a result. 8.10.3.2.5 Work groups for Draft 1.0 The chair then briefly discussed some of the work items assigned at the last meeting.

• Distribution Transformer Test Model (Lockie Test) • Jin Sim, Jerry Corkran – they have reviewed this document and feel that it is good

as written. The chair added that moisture content might be needed to be added, and they agreed to this.

• Model test (IEC 62332)

• Roger Wicks, Rick Marek, Bill Simpson – The chair noted that he will be reviewing this in the next two months in part due to a IEC meeting in November where work on this document will be initiated.

• Sealed Tube Test (Annex)



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• Tom Prevost – Tom is working on the revision of this work. He noted that this is a very commonly used procedure due to it’s ease of use, but that some specificity (such as ratios of materials and temperatures to cover) needed to be added.

• Standard Test Conditions

• Roger Wicks – the chair noted a few items here which are underway, including the need for standard conditions (temperatures, ratios, moisture content, etc.) that should be applied no matter the method. He also noted that we need to understand under which situations which test would be appropriate.

• Jin Sim mentioned that certainly a brand new insulation system would require a more extensive evaluation (minimum three point curve) vs. a periodic re-qualification type test.

• Don Platts noted that scaled models for power transformers could still be needed to better understand certain issues. This lead to a discussion regarding things like exponents to understand loss of life and the influence this may have on “perceptions” of already installed transformers.

• Housekeeping (Style, references etc.)

• Juan Castellenos, Don Platts – still open, since a more complete draft is needed before this work can be done.

Chairman Wicks then noted that a PAR extension is required and he will work with Bill Bartley to get this done in the next few days. 8.10.3.2.6 The meeting adjourned at 1:15 PM. 8.10.3.3 Working Group for Temperature Rise Test Procedures Section 11 of C57.12.90 -

Paulette Powell The Working Group met at 12:00pm October 7, 2008 in Porto Piso 1 of the Porto Palacio Congress Hotel and Spa in Porto, Portugal. There were 15 members and 44 guests in attendance. There were no patent disclosures. The minutes of the March 18, 2008 meeting were approved as written. The meeting focused on Hot Resistance Measurement straw ballot comments enumerated below: Items a, c and f were accepted as written. Item b: Unresolved negative ballot by Jerry Corkran proposing hot resistance measurement be made only on B-phase – harmonizing with IEC. The unresolved ballot comment will be provided to balloters with the next ballot.



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Item b: terminal pair be defined in 3.0 Definitions clause - “terminal pair – an associated pair of accessible terminals corresponding to a phase of a winding.” The definition will be provided to WG C57.12.80. Item d: Unresolved negative ballot by Steve Snyder concerning a 10-minute cooling curve for distribution transformers. Small distribution transformers have different thermal characteristics and different measuring equipment compared to large power transformers. The time constant is of short duration requiring measurements to be made more rapidly during the first 5 minutes. The unresolved ballot comment will be provided to balloters with the next ballot. Item e: comment by Juan Castellanos for data not to only be fitted to an exponential decay curve, but also allow an otherwise suitable curve. Thang Hochanh noted that a polynomial can result in any value at time zero, whereas an exponential decay curve gives a discrete result. Juan Castellanos commented that the radiator configuration may result in a decay curve that is not exponential. For a low winding time constant, instead of the winding cooling towards average oil temperature, it cools towards bottom oil temperature. Bruce Forsyth raised the issue concerning the mean oil temperature surrounding the winding and the location of the winding – specifically, whether the average oil temperature is really measured because top and bottom oil temperatures do not always give the expected result. Through much discussion two scenarios were identified that could possibly result in data not being suited to fit an exponential decay curve:

1. Transformers with a short winding time constant. 2. Whether the average oil temperature is in actuality measured at the winding level because

the top and bottom oil temperatures do not always give the intended result. It was mentioned that otherwise suitable curves provided too much lead way for interpretation. The Chair proposed that item e not be changed, but a Note be written to inform of these two issues and in parallel have a small group of experts try to define the appropriate curve(s) for a future modification to this clause. The Chair will solicit volunteers as none were identified at the meeting. There was no Old Business. New Business: Mark Perkins discussed forming a TF to develop provisions for a Q/C heat run. The intention is to get the required data in a short period of time; i.e. a single temperature test for a short duration. The reasons for such a test were given as follows:

1. Verify average winding gradients (e.g. checking blocked cooling – each phase would be tested.

2. Verify no unexpected gassing (concerning hotspots – a minimum rating and duration for the heat run defined)

3. Verify oil temperature rise. 4. Verify a middle rating (normally just the top and bottom rating verified). 5. Verify overload rating of transformer. 6. Verify rating, e.g. for a thermal duplicate.



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Issues defined were the minimum duration for the test and should the test be full current circulation test. Pierre Riffon mentioned HVDC Converters have a similar test – a 48-hour extended load current test. This new business item will be discussed at the Insulation Life SC for direction as it was stated by Bill Chiu that the proposal is not within the WG scope of responsibility. Being no other business, the meeting adjourned at 1:00pm. Paulette Payne Powell, Chair Juan Castellanos, Co-Chair 8.10.3.4 Task Force on Moisture Estimation in Transformer Insulation – Jin Sim 8.10.3.4.1 Rosters

The task force met on Tuesday October 7th, 2008 at 4:15 PM.

8.10.3.4.2 Patent Disclosure

The chairman asked if anyone knew of any patents that could be pertaining to this project. The following two people that spoke up. Claude Beauchemin of GE Mark Perkins of ABB 8.10.3.4.3 Discussion of the Task Force Activity

• It was noted that this was the first and the only task force meeting as it will be dissolved

with the publication of the report • The chairman discussed the objectives and scope of the TF • The draft TF report was briefly discussed • This draft will be emailed to the attendees of the TF meeting • The chairman requested that any additional contribution must be communicated to him

by the end of November 2008 • The TF will post the final draft of the IEEE Special Publication within the transformers

committee website by the end of December 2008 • Any interested persons reviewing the draft will be encouraged to provide their comments

to the TF chairman before the Spring 2009 meeting of the IEEE Transformers Committee

8.10.3.4.4 The meeting adjourned at 5:30 PM. Respectfully submitted, H. Jin Sim, Chairman



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8.10.3.5 Task Force on Furan Testing – Kent Haggerty The Task Force on Furan Testing met Monday, October 6, 2008. There were 14 members and 31 guests in attendance and 4 requested to be added to the Task Force membership. This would bring the total membership of the Furan Task Force to 60 members. Chair, Kent Haggerty was not able to attend the meeting. Tom Prevost served as acting chair and opened the meeting with introductions and the required statement for patent disclosures. There were no patent issues to be disclosed. The minutes of the March 17, 2008 Task Force meeting were approved as written. Tom Prevost and Don Platts provided some background and described the efforts to draft the task force report. The primary contributors have been Luiz Cheim, and Shuzhen Xu, working with Tom, Don, and Kent. The draft is posted on the Insulation Life Subcommittee website. The members were given the opportunity to comment on the draft as it was presented. The comments included: Scope: Clarify sentence 2- The references are based on laboratory testing to measure furans, not tests of oil samples from in-service transformers. Comment: The draft refers to oil, not to insulating liquids. Furans can be detected in all fluids. The References that are sited probably only refer to oil, so it would be appropriate to retain the description of oil. This should be verified. History Section: Comment “the hope of measuring a specific chemical that will translate directly into an indicator of the paper insulation aging. “ This should be rewritten to avoid saying a “specific chemical”. Comment “made by the delignification of wood pulp by the KRAFT process, in which wood is treated with a mixture of sodium hydroxide and sodium. “ Should be checked and rewritten, since sodium is probably not added. Suggestion was to refer to the working in CIGRE brochure #323. Comment We should note that this paper refers to Kraft papers, not other solid insulations, such as NOMEX, etc. Comment: The ASTM method for detecting and measuring Furans was adopted in 1995. Are papers written prior to that valid for inclusion? Discussion of effects of adding dicy in the thermally upgrading process. Does it affect the stability of furans and so it should be in the stability portion of the paper, or does it effect the production, so that it should be in the How Furans are Formed section? We did a quick review of the contents of the remaining portions of the paper.



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Tom noted efforts in the Insulating Fluids Subcommittee to gather DGA test data for transformers and for LTCs. The same database can be used to gather Furan data. He requested any company that has test data and the supporting other data about the transformers tested to submit that data for analysis by the task force. The path forward for the Task Force is to continue working on the Technical Position Paper on Furans. In addition, a Transformer Survey Form will be posted on the Transformer Committee Website and gathering of transformer and Furan data will continue. In addition, the Task Force will continue to gather Furan and DP information on failed transformer units from utilities and users. Also, CIGRE has agreed to share the data and results of their study on Furans with the Transformer Committee and Furans Task Force. This information will be included in the Technical Paper and survey information. Respectfully submitted, Don Platts Acting Task Force Secretary 8.10.3.6 Task Force on Winding Temperature Indicators - Phil McClure The Task Force on Winding Temperature Indicators did not meet during the Fall 2008 Transformer’s Committee meeting. 8.10.3.7 Task Force on High Temperature Transformers – Richard Marek 8.10.3.7.1 Introduction and Rosters The task force met for the first time on Monday, October 6, 2008 at 4:15 PM with 48 in attendance. 23 requested membership. 8.10.3.7.2 Minutes There were no minutes for approval. 8.10.3.7.3 Patent Disclosure The chairman asked if anyone knew of any patents that could pertain to this project. There were none. 8.10.3.7.4 First body of work The Chair introduced the meeting by discussing a proposal for the three items required for the PAR submission: the Title, the Scope, and the Purpose. The Chair will circulate these to the task force members, with feedback needed by the end of October so a PAR can be submitted. The proposed Title is: IEEE Trial Use Standard for the Design and Application of Liquid-Immersed Transformers using High-Temperature Insulation Systems.



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A question was raised whether this document should be a guide, a trial-use standard or a standard. After a short discussion the general feeling was that a guide was too weak and a standard was too strong. The Chair requested additional comments along with a response to wording of the title, since the document type will affect some of the language within the document such as should vs. shall. 8.10.3.7.5 Draft 1.0 Discussion The Chair then spent the bulk of the meeting discussing his suggestions for the development of this document. He provided information on a similar IEC document which will provide the starting point for this work. IEC 60076 – 14 is a document of exception, depending on reference documents and only focusing on thermal aspects of transformers operating at temperatures above 65 C. One key difference between this document and the IEC document is the “reference point” that is used as the basis for comparison. The IEC document defines non-thermally upgraded kraft and mineral oil as the reference system. For this IEEE document, the starting point will assume thermally upgraded kraft and mineral oil as the reference system. The reference IEC document was reviewed, including the table of contents which details the topics which would be covered in the new IEEE document. The Chair has copied the reference IEC document into the IEEE template as a starting draft and expects to use a large portion of the document. The document depends heavily on IEC references which will be changed to equivalent IEEE and ASTM references. After the document has been reviewed and modified, a formal request for copyright approval from IEC will be requested for the portions that have not been modified. 8.10.3.7.6 Next Meeting The Chair solicited input from members of the task force about holding an interim meeting late January in Atlanta as a way to speed up the development of the document. There was only mild interest in this suggestion. He further requested task force comments on draft 1.0 by the end of December, which would then be incorporated into a draft 2.0 for discussion at this meeting. This would lead to a more complete draft to be reviewed by the whole task force for the next meeting in Miami. The Chair will post Draft 1.0 on the web. Permission to use the original document has been formally provided by IEC for use by the task force and will be posted on the web with a password to be provided to the members. 8.10.3.7.7 Adjournment The meeting adjourned at 5:30 PM. 8.10.3.8 Task Force on Quality Control (Accelerated) Heat Runs – Mark Perkins



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The new task force on Quality Control heat runs met in Porto, Portugal met on October 5, 2008. This was the initial meeting of the task force which was formed at the previous meeting. There were three persons in attendance in addition to the chair, Don Platts, Paulette Payne Powell and Subhash Tuli.

The purpose of the task force is to address the need for addition to the test code of a loading test to check the transformer when a full temperature test has not been performed. This type of test has sometimes been referred to as a quality control heat run. The task force defined the scope or some of the possible purposes of such a test. These included

• Verify the average winding gradients to check for blocked cooling. This should include gradients on each of the phases. It was also discussed that the gradients would be measured at only the top rating, and only the rated current would be applied for the minimum time necessary for the gradient to stabilize.

• Check for gassing • Verify that the oil rise is in the appropriate range that it should be • This test could be used to verify the overload capability of the transformer. An

overload test would need to be customer and application dependent, so the amount and duration of the overload cannot be standardized.

• Verify the rating of the transformer. If this test indicates that the specified rating is exceeded, then the full temperature test is required, or else extra cooling could be added to insure that the specified rating is met.

The group then discussed how the task force should be organized. The recommendation was that this task force should be assigned to the working group on clause 11 of C57.12.90. Mark Perkins 8.10.4 Old Business: There was no Old Business. 8.10.5 New Business: 8.10.5.1 Moisture Content in Oil Several of the Insulating Fluids Subcommittee members were working on the revision of the IEEE 62-1995, IEEE Guide for Diagnostic Field Testing of Electric Power Apparatus Part 1: Oil Filled Power Transformers, Regulators, and Reactors, which will be C57.152 when it is approved and published. They had several issues with the published IEEE Guide for mineral oil, C57.106-2006, in the area of the moisture content in oil. Older version of this guide, C57.106-2002, listed the moisture content in terms of "% Saturation" in addition to more traditional "mg/kg" or PPM. The concept of % Saturation is technically more useful since the dielectric strength of the oil is directly related to the % saturation. However, since the amount of moisture that oil contains depends heavily on temperature and equilibrium. It is not practical to expect the actual transformer to reach the equilibrium and obtaining the temperature of the sample



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correctly. Since the introduction of this % saturation in 2002 version of the C57.106, there has been numerous cases where a significant number of very dry transformers had to be reprocessed to meet the recommended maximum % saturation. The chairman stated that if this "% Saturation" is brought back to either C57.106 or C57.152 guides, he will vote negative. The group had a lively discussion following this statement and decided to take it up to the Insulating Fluids Subcommittee meeting. 8.10.6 The meeting adjourned. Don Platts Chair, Insulation Life Subcommittee



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Performance Characteristics Subcommittee Unapproved Meeting Minutes – Porto, Portugal – October 8, 2008

F08_8.11_PCS Porto Minutes Rev 0.doc Page 1 of 9

8.11 Performance Characteristics Subcommittee – Ramsis Girgis, Chairman; Stephen Antosz, Secretary

8.11.1 Introduction / Attendance

The Performance Characteristics Subcommittee (PCS) met on Wednesday, October 89, 2008 with 46 members and 35 guests in attendance. 6 of those guests requested and were granted membership. See last page of these minutes for attendance summary.

8.11.2 Approval of Meeting Minutes

The minutes of the last meeting in Charlotte, NC were approved as written. 8.11.3 Chairman's Remarks 8.11.3.1 Administrative Subcommittee Notes

• Next Transformer Committee meeting dates and locations are as follows:

- Spring 2009, April 19 – 23, Miami, FL - Fall 2009, October 25 – 29, Chicago, IL - Spring 2010, March 7-11, (firm) – location to be determined

• IEEE PES Meeting: July 26 – 30, 2009, Calgary, AB, Canada. Transformer paper sessions are typically on Wednesday. - call for papers opens 11/3/08 - paper submission closes 12/3/08 - authors will be notified of decision on papers by 2/2/09

• There are 4 recently approved Standards, related to PCS: - C57.21 Standard Requirements, Terminology, and Test Code for Shunt Reactors

over 500 KVA R. Dudley Revision - C57.110 IEEE Recommended Practice for Establishing Liquid-Filled & Dry-Type

Power & Distribution Transformer Capability When Supplying Non-Sinusoidal Load Currents R. Marek Revision

- C57.105 IEEE Guide for Transformer Connections in Three-Phase Distribution Systems G. Reitter Reaffirmation

- C57.109 IEEE Guide for Liquid-Immersed Transformer Through-Fault Current duration B. Patel Reaffirmation

8.11.4 Working Group (WG) and Task Force (TF) Reports 8.11.4.1 PCS WG on “Test Code C57.12.90” – Mark Perkins, Chairman; Kirk Robbins,

Secretary The PCS Working Group for Revisions to test code C57.12.90 met in Porto, Portugal on October 6, 2008 at 10:15 A.M. There were 81 persons in attendance, 35 members and 46 guests of which 11 requested membership Announcements The chair asked if anyone had any patent issues relating to this standard. Being none, this discussion was closed. The minutes from the last meeting were then reviewed and approved by oral vote as written. Task Force Report



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The report out from the Task Force assigned to revise Section 12, Short Circuit testing was provided by M. Fortin and is as follows: • The task force approved a clarification of wording on when the visual inspection is to

be done. This wording will be incorporated into the proposed revision of section 12 and the changed section will be sent to the performance characteristics subcommittee for survey by the working group.

• Depending on the comments, the TF may or may not continue. • Even though there was a PAR for a guide on short circuit testing, it was decided not

to produce this guide since it would only cover the LVI test, which is no longer used. Thanks to Marcel and the task force for the work completed. Old Business The proposed changes in C57.12.90 Sections 6 and 7 that were presented in the last meeting were reviewed and some additional proposed changes were agreed to: • The arrows shown on figures 2, 3, and 4 will be removed so as not to infer that the

windings must have a particular direction. • Section 6.3.4.2 the term ratio bridge was replaced by ratio meter. • Section 7.1.1, change “normal” to “nominal” for clarity. • Section 7.1.2, The wording on the requirement for the test frequency was discussed,

and it was agreed that the acceptable frequency could be between 50 and 100 Hz or at the nominal frequency in case this is outside the 50-100 Hz range.

• Section 7.1.4, Three-phase transformers with inaccessible neutrals, will be discussed at the next meeting.

• Comment was discussed on whether or not to add a tolerance on the ratio test or to recommend that it just be added in C57.12.00 along with the other tolerances, and it was agreed to just have it in C57.12.00.

• Section 7.3.3 Ratio Meter proposed wording was discussed. It was agreed to only have a paragraph, and have it say: “The ratio meter is a device that measures both the ratio and polarity together. Other standard measurements may also be included such as the phase sequence or vector group verification or the excitation current”

• A proposal was made to provide a section on ratio measurement using a capacitance bridge. M. Kennedy took an action to provide suggested wording.

New Business • Recommendation for testing of buried tertiary windings was presented by Subhash

Tuli. The group agreed that this should first be considered in the WG on PCS revision to C57.12.00.

8.11.4.1.1 TF on section 12 of Test Code C57.12.90, “Short Circuit Test Code” – Marcel Fortin, Chairman The Task force met from 9h to 9h30, 51 persons attended the meeting; 9 members and 42 guests, 3 guests requested membership but this being the end of the project no new members are accepted. The minutes of the previous meeting, Spring 2008, was presented and approved. The IEEE patent slides have been presented. The attendees have no patent issues.



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Section 12 of C57.12.90: Short-circuit test code The parts dealing with visual inspection, discussed at the spring 2008 meeting, is reviewed altogether with survey results. The TF approve the changes proposed by the chair. This thus complete the work of the TF. Course of action The final document (clause 12 and annex xx) will be prepared and submit to PCS for review. No meeting planned for the next committee meeting.

8.11.4.2 PCS WG on “General Requirements C57.12.00” – Steve Snyder, Chairman; Enrique Betancourt, Secretary The Working Group met on Monday, October 06 at 4:15 PM. There were 22 members and 19 guests present. The following two guests requested membership, bringing the Working Group membership to 73 members: Amit Mukerji ABB Inc. Sanjay Patel Smit Transformer Sales Inc Following introductions, the minutes of the March 17, 2008 Charlotte meeting were approved as submitted. Working group members were then asked about any applicable patents pertaining to our work. No patents were disclosed by anyone. The chairman presented an update on the C57.12.00 ballot. This document, together with standard C57.12.90, has been officially out for ballot for approximately 1 week, and closes on October 30, 2008. Old Business WG Item 82, Clause 7.1.4.4 Stabilizing Windings- TF Report and Discussion The chairman (Enrique Betancourt) of the Task Force on Stabilizing Windings, presented a progress report including the first, proposed new wording for Clause 7.1.4.4 of C57.12.00. Highlights from the discussion:

It is recommended to clearly differentiate the concepts of “tertiary windings” from “stabilizing windings”. A consensus was reached on the concept that stabilizing windings for three phase transformers and autotransformers are delta connected and that they may have one or two terminals brought out through bushings, in order to close and ground one corner of the delta, external to the tank. It is necessary to describe in explicit form the load MVA required for sizing stabilizing windings in Y-Y connected transformers and autotransformers. Some basic concepts from commonly available literature were referenced (Blume). The new Clause 7.1.4.4 requires demonstration of the adequacy of Stabilizing Windings for transient and continuous loads by means of calculation for thermal and mechanical performance; no actual test is recommended by the TF.

As next steps, the Task Force will evaluate and assimilate the received feedback for development of a new wording of Clause 7.1.4.4, which will be submitted to the chairman of the WG on General Requirements C57.12.00 before the next meeting, for review and comments by members and registered guests.



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New Business WG Item 84, Request for Test Requirements on Buried Tertiary Windings of Ratio, Phase Angle, Polarity, and DC Resistance A request from Mr. Subash Tuli for factory testing on buried tertiary windings (now, according to foregoing paragraphs, just “stabilizing windings”) of transformation ratio, phase angle, polarity and DC resistance, was presented for discussion. It was first recognized that manufacturers perform several QC tests for internal control purposes that would not be included on the test report, unless specified by users. It was strongly questioned if it would be of any value to report any tests that would not be possible to replicate in the field, for diagnostic purposes. After much discussion, a survey of the attendees showed 20 “in favor” and 1 “opposed” for requesting that manufacturers report only the ratio and DC resistance (with temperature) of stabilizing windings, and only when two terminals are brought out of the tank for closing and grounding of the delta connection. The chairman will formulate appropriate language for this for insertion into C57.12.00, and determine where this new requirement should be placed in the document. This will be presented to the Working Group at or before the next meeting.

8.11.4.3 WG on “Loss Tolerance and Measurement” – Ed teNyenhuis, Chairman; Andy Steineman, Secretary • 6 members and 7 guests attended. • The IEEE Patent Policy was reviewed and an opportunity for WG members to identify

or disclose patents that the WG member believes may be essential for the use of that standard. No responses were given.

• Minutes from the Mar 18, 2008 Charlotte Meeting were reviewed and approved. • Frequency Conversion Factors of Transformer Performance Parameters – The status

of the proposed wording for inclusion in C57.12.00 and C57.12.90 was reviewed. The status is as follows: - C57.12.00 and C57.12.90 are currently being balloted with the proposed wording. - There will be a tutorial this afternoon (Oct 7th) to introduce the frequency

conversion factors to the entire Transformers Committee. • C57.123-2002 – Guide for Transformer Loss Measurement – The status of the Guide

was reviewed: - Guide was balloted, and returned with 2 negative votes (74 comments total). - Negative comments have been resolved. - All other comments were discussed and incorporated into the guide. - The revised document will be sent for 10-day recirculation.

• Dual Logo IEEE/IEC document status for the Loss Measurement Guide:

- All comments from the IEC were reviewed. Most dissenting comments were in regard to the references to IEEE documents. These references have been moved to an informative bibliography, and the document has been resubmitted.

- It is anticipated that IEC responses will be available for review at the next meeting.



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8.11.4.4 WG on “Switching Transients Induced by Transformer / Breaker Interaction”, PC57.142 – Robert Degeneff, Chairman; Bill Griesacker, Secretary The WG met at 9:00 AM on Oct 7, 2008. There were 42 attendees, 22 members, and 20 guests. The minutes from the March 2008 meeting in Charlotte, NC were approved. • Request for any patent issues to be made known, there were none voiced.

• An overview of Draft 5.1 was presented. This draft includes input from Switchgear

and Transformers Committees. On August 20, 2008 Draft 5.1 was submitted to IEEE for editorial review. Two issues remain, the first is attaining copyright permission for five figures, the second issue is resolving the difference in the PAR scope and draft 5.1 scope. It was recommended to request the IEEE editorial board’s invitation letter for ballot to include a statement that the guide was a developed through a joint effort between the Switchgear and Transformers Committees.

• Unfinished business – Some topics for future consideration include high frequency

excitation, electronic loads, excitation other than switchgear, insulation characteristics at high frequency, mitigation for high voltage systems, and factory testing.

• A recent technical paper on this topic was published. CIGRE – Brazil JWG A2/C4-03.

Eleven failures were discussed and a factory acceptance test was explored. This paper will be placed on the TC web site.

8.11.4.5 WG on “Semi–Conductor Rectifier Transformers”, C57.18.10 – Sheldon Kennedy, Chairman The WG met on Tuesday, Oct 7, 2008 at 4:15 PM with 4 members and 2 guests present. The IEEE disclosure statement was discussed. There were no patents pertaining to this standards work for which any members had awareness. The minutes of the October 16, 2007 meeting in Minneapolis were approved. The Chair announced that the Amendment, C57.18.10a had been approved and published in March 2008. The Errata was produced by IEEE in 2006. We now have these three documents as a group. C57.18.10 expires in 2008. A Reaffirmation ballot pool for C57.18.10 is being formed with a copy of the Errata and the Amendment, C57.18.10a included. This ballot pool closes on October 12. Balloting on the reaffirmation will proceed afterwards. Interested SA members may sign up to join this ballot pool. We had expected to go for a PAR for a Revision, but the chair was asked to try to get the standard reaffirmed without a full revision process. There were negative ballots during the 2003 reaffirmation process that were satisfied by stating that issues they had with the existing document would be taken into consideration during the revision process. I see some of those names in the reaffirmation ballot pool and would expect negative ballots. There was a discussion about the standards being written in the Vehicular Transportation Society of IEEE. A traction rectifier transformer standard, rectifier standard and many C37 switchgear standards are being revised by this organization with emphasis on the needs of the transit and rail industry. Concerns about duplication of standards and conflicts in the standards were raised. The chair announced that the IEC Converter Transformers for Industrial Applications IEC 61378-1 standard is under revision again.



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8.11.4.6 WG on “IEEE Standard Requirements, Terminology, and Test Procedures for Neutral Grounding Devices”, PC57.32 – Steve Schappell, Chairman; Peter Balma, Vice-Chair No Meeting Held.

8.11.4.7 PCS WG on “Guide for the Application and Interpretation of Frequency Response Analysis for Oil Immersed Transformers”, PC57.149 –– Chairman; Charles Sweetser The WG met for the development of the Frequency Response Analysis (FRA) Guide in Porto Portugal on October 6, 2008 at 2:45 PM. There were 60 people in attendance. The meeting was chaired by G. Matthew Kennedy as Charles Sweetser was unable to attend. The FRA Working Group meeting was called to order at 2:45 PM. The first order of business was to show five slides regarding patents, assurances and inappropriate behavior. The minutes from the Charlotte 2007 meeting were approved by unanimous vote. Working Chair Update • A PAR 2 year extension has been granted. • Draft 6 to include comments from the past two meetings will be submitted no later

than November 15, 2008. The chair asks that all members review and submit comments by February 1, 2009.

• The goal of the committee is to go to ballot by Fall 2009 with release of the guide by Fall 2010

Review of Comments from Draft 5 1.2.2 FRA Magnitude. Suggestion was made to include in the definition that magnitude is often plotted in dB-Scale. 1.2.3 FRA Phase. Suggestion was made that the definition should include that the most frequently used units are degrees. 1.2.6-9 Winding Self Admittance. Several members voiced their concern that the description and figure for winding self-admittance was confusing. Perhaps a clearer description would help make the section more useful and understandable. • Peter Werelius will submit proposed changes for items 1.2.2, 1.2.3 and 1.2.6-9 as

outlined above. 1.2.14 Noise. The definition of noise may not be entirely correct. Discussion by the group resolved that noise, as it pertains to FRA measurements, is either broadband or narrowband noise. It may be possible that broadband noise is band limited over a range. The solution may be that a more applicable definition of noise is required as well as case study examples of noise should be provided in the interpretation section. • G. Matthew Kennedy will propose changes to 1.2.14 with comment by Peter Werelius

and Alexander Kraetge



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1.2.16 Amplitude Displacement. Given that both “Amplitude” and “Magnitude” are used interchangeably it was brought up that this could lead to confusion. After discussion within the group the consensus is that “Amplitude” should be used when referring to the results, but “Magnitude” will remain the plots name. 1.2.17 Phase Displacement. Earlier use of the term “ratio” when referring to changes in phase is incorrect. The proper term is “displacement”. Members of the group agreed and will use the term “displacement” to describe variations in phase angle. 2.4 Recommended FRA Measurement Test Parameters. The current D5 states: "The test set shall be capable of measuring sufficient dynamic range, over the frequency range in order to accommodate all transformer test objects.(> 60 dB)". The recently release CIGRE Guide 342 states: “Concerning the measurement range, the most problematic region appears to be the first resonance using the end-to-end measurement (typically -90 dB with a 50-Ω measurement). A measurement range of -100 dB to +20 dB should be enough to cover all cases. There may be some conflict between the two guide’s recommended ranges. Discussion ensued among the group as to whether the CIGRE guide was correct and may be too conservative and the upper range doe not match their stated purpose (+20dB). An agreement on what should be stated or changed in D5 was not reached. The Chair asked that members consider these changes and be prepared to discuss at the next scheduled meeting. 3.6 Test Leads. In CIGRE Guide 342 there are different terms used to describe the various tests. Below is a table showing these differences:

CIGRE Guide 342 IEEE PC57.149 End-to-End Open Circuit Self Admittance (OC) End-to-End Short Circuit Short Circuit Self Admittance (SC) Capacitive Inter-Winding Inter-Winding (IW) Inductive Inter-Winding Transfer Admittance (TA)

Discussion concluded that neither naming convention was optimal but improvement could be made to the PC57.149 naming convention to limit confusion. 3.8 Test Connections. A more descriptive explanation, e.g. Measure Top to tail, is needed. Peter W will propose a paragraph. 1.2.17 Cross Correlation. A typographical error was pointed out in that a cross correlation coefficient of 1.0 does not indicate randomness but unity correlation. G. Matthew Kennedy will make corrections to the document. “I-I-I” Type Transformer Testing. Alexander Kraetge presented the case where some delta windings have a split busing design. This split bushing design allows for each winding to be separated and there is confusion on how this type of transformer should be tested. After much discussion by the group, the recommendation was to test this as a normal delta, but to include an optional/diagnostic test that allows for splitting of the winding. This should be included in the list of tests and note added. New Business



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Required versus Optional Test. Several members voiced their concern that there are some design transformers that quickly go over 18 tests and this can be unwieldy and may be unnecessary. It was proposed that some of the more lengthy test should be reviewed and consider splitting them into “required” and “optional” to allow for quicker testing. Members were not prepared to discuss this difficult subject. The chair asked that all members consider this issue and be prepared to discuss at the next scheduled meeting. CIGRE Activity and Cooperation. Paul Jarman, head of TC14, reported that CiGRE will start up standardization in IEC and this group should become involved in the activity. The Chair will make contact with the IEC group and report to the working group at the next meeting Draft 5 and future Draft 6 Review. The chair encourages all members to review and provide comments on the discussed items if willing. In addition, all members should review the upcoming Draft 6 and provide comments to expedite balloting by February 1, 2009 once Draft 6 becomes available.

8.11.1 Old Business None

8.11.2 None



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Attendance at this Meeting

MEMBERS

1. Stephen Antosz 2. Jim Antweiler 3. Javier Arteaga 4. Barry Beaster 5. EnriqueBetancourt 6. Bill Chiu 7. Donald Chu 8. Craig Colopy 9. Alan Darwin 10. Bob Degeneff 11. Don Fallon 12. Joe Foldi 13. Bruce Forsyth 14. Marcel Fortin 15. Eduardo Garcia 16. Ramsis Girgis

17. E. Gomez-Hennig 18. Roger Hayes 19. William Henning 20. Laszlo Kadar 21. Sheldon Kennedy 22. Vladimir Khalin 23. Alexander Kraetge 24. Tamyres Machado 25. Richard Marek 26. Dennis Marlow 27. Van Nhi Nguyen 28. Miguel Oliva 29. Mark Perkins 30. Christoph Ploetner 31. Bertrand Poulin 32. Jean-Chris Riboud

33. Kirk Robbins 34. Marnie Roussell 35. MathieuSauzay 36. Ewald Schweiger 37. Hem Shertukde 38. Jin Sim 39. Steven Snyder 40. Andy Steineman 41. Ed teNyenhuis 42. Alan Traut 43. Subhash Tuli 44. Dharam Vir 45. Peter Werelius 46. Jennifer Yu

GUESTS

1. Jose Gamboa 2. Paul Jarman ** 3. Sanjib Som 4. S. Tenbohlen ** 5. Amit Mukerji 6. YuanZhong Cui** 7. Yan Xu 8. Jeewan Puri 9. Ron Nicholas 10. Wayne Johnson 11. Derek Hoch 12. Randall Kyle

13. Pat Pries 14. YB Bae 15. Roberto Asano 16. Jose Davila 17. Mike Lau 18. Sue McNelly 19. Rudolf Ogajanov 20. Miguel Cuesto 21. Jose Grijuela 22. Marta Munoz 23. G. M. Kennedy ** 24. HansWalter Krop

25. Jim Graham 26. Sanjay Patel 27. John Darby 28. Juan Castellanos 29. Xose M. Lopez 30. Ernst Hanique ** 31. Rodrigo Ocon 32. Richard Amos ** 33. Dave Ostrander 34. Valery Davydov 35. Oleg Roizman

** Guests requesting Membership.



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8.12 Power Transformers – Tom Lundquist, Chairman The Power Transformers Subcommittee met on Wednesday, October 8th, 2008 with attendance of 115; comprised of 34 members and 81 guests. The minutes from the Charlotte, North Carolina meeting were approved with no changes or corrections. The chairman asked if anyone was aware of any patent conflicts, none were voiced. 8.12.1 WORKING GROUP AND TASK FORCE REPORTS 8.12.1.1 TASK FORCE FOR REVISION OF C57.17, REQUIREMENTS FOR ARC FURNACE

TRANSFORMERS – Dominico Corsi, Chairman Minutes will be provided later. 8.12.1.2 WORKING GROUP FOR DEVELOPMENT OF PC57.143, GUIDE FOR

APPLICATION OF MONITORING TO LIQUID IMMERSED TRANSFORMERS AND COMPONENTS – Donald Chu and Andre Lux, Co-Chairmen

No meeting. Working to get document out for ballot. 8.12.1.3 WORKING GROUP FOR DEVELOPMENT OF PC57.148, Standard FOR Control

CabinetS FOR TRANSFORMERS – Joe Watson, Chairman The Working Group for the Standard for Control Cabinets for Power Transformers met on Monday at 12:00 pm with 11 members and 5 guests.

The Scope and Purpose sections of the document were discussed and it was agreed that we should request a change to the wording of both sections on the PAR to align with the wording of those sections in the document.

The WG also agreed to limit the Scope of the document and PAR from Class I and Class II transformers to Class I and Class II transformers 10MVA and greater. The Standard is intended to cover all transformers 10MVA and greater as a default when control cabinet specifications are not specified by the user.

Padlock details will be specified as done in C57.12.10 where the hole size for the padlock is specified to be 3/8” (9.53mm), rather than the dimensions of the padlock.

DC relay voltage was revised from 120 Vdc to 125 Vdc.

The default auxiliary power AC voltage was revised from 120V single-phase to 208/120V AC. An option will also be added to permit the specifier to require two separate AC circuits – one for the heaters, lights and power receptacle and another for the cooling and other auxiliary loads.

The Standard will recommend that the specifier specify the type of wiring terminals required by the User, but the default wiring terminals will be rated to 15A or greater, for ring terminal wire lugs and the default current transformer (CT) wiring terminals will be shorting type terminal strips.

An Annunciator is optional, but when required a “reflash” logic will be the default standard.



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The default wiring terminal numbering codes were agreed as follows:

• All wiring terminal strips other than CT wiring terminals shall be numbered “TB-1,” “TB-2,” “TB-3,” etc.

• All CT wiring terminal strips shall be numbered as:

“CT-(Winding)-(Phase)-(CT position)” where the winding notation is H, X and Y to indicate the HV, XV or YV windings, where the Phase notation is 1, 2, and 3 to match H1, H2, H3, etc., and the CT position notation is 1, 2, 3, 4, etc., with one being the inner-most CT and the highest number being the outer-most CT. For example, the terminal strip for the inner-most CT on the B-phase (2-phase) XV winding would be numbered “CT-X-2-1.”

The document will be revised and Draft 7 will be presented to the WG as a straw ballot within the next month.

The meeting adjourned at 1:15.

8.12.1.4 WORKING GROUP FOR DEVELOPMENT OF PC57.131, STANDARD REQUIREMENTS FOR TAP CHANGERS - William Henning, Chairman

The Working Group on Tap Changer Performance met on Monday, October 6, 2008 with 7 members and 8 guests present. The working group chairman asked if anyone in the room had information on patents that may be essential for the implementation of C57.131, Standard Requirements for Tap Changers. It was noted that no one present at the meeting expressed knowledge of essential patents. The working group chairman asked if there were any additions or corrections to the meeting minutes of March 18, 2008. It was noted that no changes were required to the minutes. The status of the draft of C57.131 revision was discussed. We have a complete document, but its format fits the IEEE style manual in effect when the original document was approved. The results of the editorial review lead to two items: 1. The scope does not agree with the PAR. 2. The format does not adhere to the latest style manual. Item 1: The document scope does not match the PAR. The WG did not change the scope but added to it some clarifying text that made the scope statement more specific. The new text did not conflict with or alter the meaning of the scope statement as written on the PAR. But it used different words and elaborated some. To fix this without applying for a PAR revision and without loosing the clarifying text, the text in question was moved to the Abstract clause at the beginning of the document. The only text that remains in the scope clause is the exact wording on the PAR. In this way the IEEE requirements were met, and the desired text was retained. Item 2: The format does not adhere to the latest style manual.



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The entire document will be typed into the latest IEEE template. Then a ballot group can be formed. The meeting was adjourned at 3:30 pm. 8.12.1.5 WORKING GROUP FOR DEVELOPMENT OF PC57.150, GUIDE FOR THE

TRANSPORTATION OF TRANSFORMERS AND REACTORS RATED 10,000 KVA OR LARGER –Greg Anderson, Chairman

No minutes received. 8.12.1.6 TASK FORCE FOR FUNCTIONAL LIFE TESTS OF DE-ENERGIZED TAP

CHANGERS – Phil Hopkinson, Chairman Attendance: 15 members + 8 guests for a total attendance of 23 persons.

• Last Meeting Minutes discussed. It was pointed out the Silicone Oil promotes most contact corrosion by carrying oxygen and turning into sand. Ester fluid is most stable. Even Tin-Copper contact combination passed thermal life in Natural ester (FR3) when it failed in mineral oil.

• Minutes of the last meeting were approved with one change. • Central Moloney had tested Tin plated copper- Tin plated copper contact combination.

They found it to be stable. They did not record voltage drop across the contacts. Instead they measured at the bushings thus losing some sensitivity. Tin plating increased the contact resistance. The overall resistance should be approximately 60 micro-ohm versus 25 micro ohm for silver-silver. The stability of this combination should be verified. Larry Dix will do it at Quality Switch. It was agreed that the contacts should be preconditioned by moving the moving contact stop to stop twice before testing.

• Contact voltage raises the super temperature – Phil Hopkinson had proposed 130 C oil temperature for thermal life testing and 2 XN current. Deter Donal showed data that had been prepared by Dr. Axel Kraemer where lower oil temperature (115 C) and higher current (4XN vs. 2 XN) for Silver – copper contacts was not acceptable. However, experience showed that it should have been. Axel Kraemer of MR had proposed lower Oil temperature (115 deg. C) and higher current (4X normal) for this test to stay well below the flash point of oil. Phil Hopkinson’s Calculations showed that at 3X nomal current the super temperature increment over top oil should have been 30 Deg.C but at 4X normal current it would be 84 C higher. This gave an acceleration factor that is too high. Phil will send his analysis to Axel for his review. The correct super temp should have been 155C. This has worked in the past. It was pointed out that 130c oil is dangerously close to the flash point of the oil. Acceleration factor should be 1000 to simulate 30 year life.

8.12.1.7 WORKING GROUP FOR REVISION OF C57.135, GUIDE FOR THE APPLICATION, SPECIFICATION AND TESTING OF PHASE-SHIFTING TRANSFORMERS – Jin Sim, Chairman



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The Working Group (WG) for revision of the Phase Shifting Transformers Guide, C57.135, met Tuesday at 9:00 am with 13 members and 7 guests. The WG was asked about any possible Patent issues and none were known. The minutes from the previous meeting were approved with no changes. The PAR is in-effect until the end of 2011 and the Guide is intended to remain as a dual-logo IEEE/IEC document. VSN Sankar had submitted a list of factors to be considered in the evaluation of tenders, to be included in Section 4.5.1, and this list was discussed by the WG. Mr. Sankar had attached comments to each of the items on his list that were not intended to be added to the Guide. All of these comments were deleted and the list was divided into two sections;

• Factors specific to the Phase-Shifting Transformer (PST) design • Factors specific to the project

After discussion, the list of factors was finalized as follows:

For PST 1. Phase-shifter purchasing price or the first cost 2. Cost of capitalization of losses 3. Impedance variation across the tap range 4. Angle at full load 5. Electrical arrangement of on-load tap changers 6. On-load tap changers margins on step voltage, rated current, fault current and switching

capacity and duty of changeover selector\ 7. Test capability

For Project 1. Foundations and the space requirement in the substation 2. Oil spill containment volume 3. Shipping weights and shipping dimensions 4. Protection and relay costs

Suggested changes to Section 4.5.2 from Mathieu Sazau were also discussed by the Group. After much discussion, the following text was agreed for this section to clarify design considerations for single core designs: Clause 4.5.2 The single core design is less complex and has fewer winding segments than two-core designs but has some disadvantages as follows: The LTC and the tapped winding are in the line end of the windings and are directly exposed to the system overvoltages. The short circuit impedance of the single core design PST is very low at tap positions near zero degrees phase shift. Therefore the ratio between external fault currents passing through the PST and rated current may become very high, especially in systems with low fault current



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impedance. This has to be taken into account when selecting the tap changers and when calculating the forces in the windings. Comments on Section 10.1.1.4 regarding test windings were also discussed and modified by the WG. The section will be modified to state that an auxiliary winding may be installed for shielding and/or testing purposes and that the presence of these windings should be indicated in the tender documents and shown on the nameplate. The Guide’s References will be updated to include IEC documents. The revised Guide will be posted on the Transformer Committee website. The meeting adjourned at 10:15. 8.12.1.8 WORKING GROUP FOR REVISION OF C57.12.10, STANDARD REQUIREMENTS

FOR LIQUID IMMERSED POWER TRANSFORMERS - Javier Arteaga, Chairman No meeting held. The ballot pool is open. A one (1) year extension for the PAR has been requested. Intend to hold ballot immediately after the ballot pool is closed. 8.12.1.9 WORKING GROUP FOR THE REVISION OF IEEE STD 638-1992, IEEE

STANDARD FOR QUALIFICATION OF CLASS 1E TRANSFORMERS FOR NUCLEAR POWER GENERATING STATIONS – Craig Swinderman, Chairman

8.12.1.9.1 Attendees: 2 members + 2 guests The meeting began at 2:45 pm. The meeting minutes from March 2008 meeting were approved. The IEEE patent policy slides were shown. An opportunity was provided for the attendees to identify or disclose patents that may be essential for the use of the standard. No responses were given by the attendees of the meeting. Topics discussed: Since the last meeting in March, 2008, the P638 document has been updated and is now Draft #3. This latest draft was reviewed during the meeting. This draft #3 of the document will be posted to the transformers committee website shortly. The majority of the document is nearly complete, but a few remaining items need to be addressed. During the review of the information contained in the updated Annex A of the draft document that describe the thermal aging procedures and calculations, it has been discovered that some of the figures and graphs included in the annex, which are updated figures pulled from another referenced standard C57.96-1999, are actually incorrect. The updated figure is intended to replace a similar, but outdated figure from the original document. A member has volunteered and has already contacted the working group chair of this other standard in order to try and correct these figures in our document. We will try and obtain the original formulas for the curves and have the curves re-plotted correctly. This work will be completed prior to the end of this year.



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In addition, a new section has been added to the document to address concerns raised during the re-affirmation ballot regarding transformers subjected to non-sinusoidal loads, referencing C57.110. However, during the working group meeting, some members questioned whether this really applied to class 1E applications, as this standard applies to a very specific transformer application, and these applications may not necessarily be subject to non-sinusoidal loads in service. We will contact the person initiating the re-affirmation comment, and will poll additional users for more information on the validity of the non-sinusoidal load concerns for this particular application. The current planned schedule for the working group is to have draft #4 of the document completed by this December 2008. We will then send the document out for a straw vote in early 2009, and then submit the document for the Mandatory Editorial Review and balloting shortly thereafter. The meeting adjourned at 4:00 pm. 8.12.1.10 WORKING GROUP FOR DEVELOPMENT OF PC57.153, GUIDE FOR

PARALLELING TRANSFOREMRS – Tom Jauch, Chairman * The working group met with 8 members and 9 guests in attendance. The minutes from the last meeting were approved and no patent issues were identified. * The group reviewed the Scope and Purpose as shown in the newly approved PAR. BASICALLY, this paralleling guide describes and compares control methods of paralleling power transformers equipped with load tap changers (LTC) or series regulators. * The group reviewed the 3 major premises of transformer paralleling: (1) maintaining the basic function of voltage control, (2) to minimize circulating or difference currents, and (3) automatically operate correctly regardless of system configuration changes. * We discussed a definition of “Paralleled Transformers”. 3 options were discussed with the preferred one being: “Two or more transformers connected in such a manner that they share in supplying power to a common load bus.” * The group reviewed and discussed the automatic operations of several substation and system configurations. Discussions included how these varied conditions create different control configurations which need to be made automatically. * The several names given to paralleling control methods were discussed and proposed “preferred” names were listed. * Two possible system questions to determine the need for paralleling equipment or this guide were discussed. 1) Will ANY system condition cause this transformer to be in parallel with another? (IF YES) 2) Will ALL system conditions cause “tap difference” control voltages to create paralleling self correction? (IF NO) THEN: It will require parallel equipment (master follower, circulating current, negative reactance, var balancing or power factor – other?) * We reviewed the CEMA paralleling standards which included master/follower and circulating current. More information from CIGRE standards will be discussed at the next meeting. * The Guide’s general outline and the section outlines were briefly reviewed with a call for members to choose a subsection to discuss and do so. We will hopefully have sections sent to members and guests for comments in the coming months.



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The meeting was adjourned at 5:30pm. 8.12.1.11 TASK FORCE FOR TRANSFORMER TANK RUPTURE AND MITIGATION – Peter

Zhao, Chairman Meeting of the Task Force for Tank Rupture & Mitigation convened Monday morning at 10:30am. Substitute chair for the meeting was Robert Thompson, standing for Peter Zhao who was not able to attend.

Knowledge of patent concerns was requested, with none cited.

Attendance was 42 (11 members, 31guests). Six guests requested membership (for Guide if WG approved). It should be noted that this task force was created several years ago with participation of only three or four persons, but strong and growing attendance since suggests a significant interest in development of a standard or guide covering tank issues.

The status of the White Paper that this task force has been working on was reported by Terry Lee. The White Paper, which was submitted for approval in early February, 2008, was well received by reviewers and is expected to be approved for publishing in IEEE Transactions – Power Delivery once certain changes are incorporated into the document. The primary revision of substance is to remove an appearance of promoting a particular supplier of a pressure suppression system. Terry asked the attendees for feedback on resolving the issue by insertion of a disclaimer of preference for any particular method for mitigation, along with editorial rewording of some objectionable sections. Feedback from attendees was supportive of this solution and the paper revision and re-submission will proceed.

It should be noted that, with the publishing of the White Paper and encouragement of the reviewers, the work of this task force is essentially complete. A remaining task is to request permission to issue a PAR for formation of a Working Group for generation of an application guide relating to tank designs. With the Chairman’s stated expectation that the PAR scope will be for “Tank Design Issues” the meeting moved into discussion of topics that should be included in such an Application Guide. Progress was being made toward this list when a recommendation was made from the floor that the issues of tank rupture and mitigation was worthy of a stand-alone application guide. Development of the list was interrupted to get a show of hands (members and guests) for interest in pursuit of a guide based on tank rupture and mitigation only. The support for the narrower scope (for tank rupture) was three to one, with 29 hands up.

A second show of hands was requested for support of the formation of a Task Force to pursue another application guide for tank issues in general, based on the types of issues already discussed earlier in the meeting. Pursuing a guide with this more general scope (in addition to the tank rupture guide) was supported unanimously (by a show of hands of members and guests). The tank-related issues that had been discussed were:

1. Design for withstand of shipping stresses.

2. Design for withstand of vacuum pulled for filling.

3. Design for withstand of seismic stresses.

4. Sound abatement.

5. Tank design for vibration control.

Jin Sim agreed to provide Craig Swinderman a draft of IEC 600-76-1 and to prepare a report to be presented at the next meeting of this task force (in Miami), concerning tank-related contents of that document.



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Conclusions from this meeting are as follows:

1. Task force chairman should request permission to submit a PAR (with scope and purpose) confined to tank rupture and mitigation issues.

2. The Tank Rupture and Mitigation task force recommends that a new Task Force be established to consider the value of a second guide relating to general issues with transformer tank design, such as those listed above.

Item 2 will be raised under new business at SC Power Transformers meeting on Wednesday, October 8.

After much interesting and informative discussion, the meeting was adjourned at 11:45am.

8.12.1.12 TASK FORCE FOR EVALUATING THE NEEDS OF TRANSFORMERS USED

WITH SVC – Peter Zhao, Chairman No meeting was held. 8.12.2 OLD BUSINESS None. 8.12.3 NEW BUSINESS

- Suggest to form a task force to decide if there should be a guide written to cover PV generators impact on power transformers. The transformer size fits more into distribution class however, these transformers should in many ways be considered GSU so there is a question regarding which subcommittee this TF if created would fit into.

- Tank Rupture TF has requested to submit for a PAR. The chairman has requested a draft title and scope description be submitted for Subcommittee approval and then AdCom acceptance.

8.12.4 STATUS OF “INACTIVE” GROUPS 8.12.4.1 WORKING GROUP FOR THE REVISION OF C57.93, INSTALLATION OF LIQUID-

FILLED TRANSFORMERS - Michael Lau, Chairman This group is not meeting; major work on this document is complete, waiting for publishing. 8.12.4.2 TASK FORCE FOR WIND FARM TRANSFORMERS – Joe Watson, Chairman Work of this group is complete; the task force is inactive.



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9. Editor’s Report – Fall 2008 Porto Meeting Between March 16, 2008 and October 4, 2008, a total of 78 papers in the transformer area were submitted to IEEE Transactions on Power Delivery for possible publication. Many of the papers in this rotation have been revised and resubmitted at least once. For the 61 reviews completed during this period, the recommendations were: Accept without changes: 14, Revise and Resubmit: 28, and Reject: 17. Another 19 papers are under review or are being processed to send out for their initial review. A summary of the accepted papers is at the end of this report. I would like to thank all of the reviewers who volunteered for this effort and donated their time, and would like to encourage everyone associated with IEEE Transformers Committee activities to consider becoming a Reviewer. The comments and suggestions of the reviewers improve the quality of the papers that are published and we need the help of all of you to ensure that we continue to have quality papers that benefit all of us. I would like to encourage those Reviewers that already have an account on IEEE Manuscript Central to keep their profile information updated and complete the areas for key words and areas of interest. We need more reviewers and I encourage any of you that have not signed up as reviewers to sign up per the instructions below. Respectfully Submitted, John Crouse Editor, IEEE Transactions on Power Delivery [email protected] All members and attendees of the IEEE Transformer Committee are invited to review technical papers. Please sign up at: http://tpwrd-ieee.manuscriptcentral.com/

INSTRUCTIONS FOR SIGNING UP TO REVIEW IEEE TRANSACTIONS PAPERS 1. Before you create a new account, please check for an existing account by clicking on:

"Check for Existing Account" 2. Assuming that you do not get an existing account notification email, click on "Create New

Account" and enter in your information. 3. Please specify any “Specialty / Area of Expertise” according to the 5 numerical codes

below:

13a: Power and Instrument Transformers 13b: Insulating fluids category 13c: Dielectric Testing 13d: Audible Noise and Vibration 13e: Transformer Modeling Techniques

4. Please specify any “Key Words” such as: distribution transformers, core losses, oil DGA, or thermal, for example.

5. Submit your information. 6. Click on "Request Reviewer Status" to be enabled as a reviewer.



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Accepted Papers Number Title Key Words Author Decision Date 1 TPWRD-

00605-2007.R1

Research on Wavelet Networks in Power Transformers Diagnosis Using Dissolved Gas Analysis

Power transformers, Fault diagnosis, Genetic algorithms

Mr. Chong Pano

Accept 6/2/2008

2 TPWRD-00339-2007.R2

An Integrated Neural-Fuzzy Approach for Fault Diagnosis of Transformers

Self organizing network, neural-fuzzy model, subtractive clustering, cluster centers, transformer fault diagnosis

Dr. Ram Naresh

Accept 3/24/2008

3 TPWRD-00577-2007.R3

Impacts of Transformer Core Hysteresis Formation on Stability Domain of Ferroresonance Modes

Ferroresonance, Transformer, Hysteresis, Core Loss, Bifurcation Diagram, Preisach Theory

Dr. Afshin Rezaei-Zare

Accept 04/03/08

4 TPWRD-00197-2007.R3

A Preliminary Assessment of the Impact of Global Warming on Distribution Transformer Loss of Life

global warming, distribution transformers, distribution engineering, loss of life, climate, IEEE Standard C57.91

Prof. Gerald Heydt

Accept 04/21/08

5 TPWRD-00537-2007.R2

Improving Reliability Assessment of Transformer Thermal Model Parameters Estimated from Measured Data

Top-oil temperature, hot-spot temperature, transformer thermal modeling, parameter estimation, least squares regression, bootstrapping

Mr. Xiaolin Mao

Accept 06/26/08

6 TPWRD-00738-2007.R2

ANFIS Based Compensation Algorithm for Current Transformer Saturation Effects

Current transformers, Saturable cores, ANFIS, Compensation

Prof. Koksal ERENTURK

Accept 07/21/08

7 TPWRD-00091-2008.R1

Dual Three-Winding Transformer Equivalent Circuit Matching Leakage Measurements

Transformer Leakage Inductance, Negative Inductance, Principle of Duality, Equivalent Circuit, Three-Winding Transformers, Electromagnetic Transients, EMTP

Prof. Francisco De Leon

Accept 07/29/08

8 TPWRD-00805-2007.R1

A Hybrid Winding Model of Disc-Type Power Transformers for Frequency Response Analysis

Transformer windings, frequency response analysis, transfer functions, multiconductor transmission lines

Prof. Henry Wu

Accept 08/15/08

9 TPWRD-00071-2008.R1

A Study on the Impact of Low-Amplitude Oscillatory Switching Transients on Grid Connected EHV Transformer

Transformer, EMTP, ATP, LPS, Switching-transients, Resonance, Over

Mr. Dilip Debnath

Accept 08/05/08



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Number Title Key Words Author Decision Date Windings in a Longitudinal Power Supply System

voltage

10 PESL-00023-2008

On the mechanical short time rating of a current transformer

Current transformer, short time rating, finite element method

Dr. Jayashankar Venkataraman

Accept 08/20/08

11 TPWRD-00025-2008.R3

CORROSIVE SULFUR INDUCED FAILURES IN OIL-FILLED ELECTRICAL POWER TRANSFORMERS AND SHUNT REACTORS

Oil insulation, corrosive sulfur, transformer, shunt reactor, failures, standardization

Prof. Massimo Pompili

Accept 07/30/08

12 TPWRD-00793-2007.R1

Analysis of Air-Core Reactors from DC to Very High Frequencies using PEEC Models

Air-core reactor, impedance measurements, modeling, partial element equivalent circuit (PEEC), partial inductance, coefficient of potential, electromagnetic coupling, time domain analysis, frequency domain analysis

Mr. Mathias Enohnyaket

Accept 10/02/08

13 TPWRD-00770-2007.R2

A Multi-Purpose Balanced Transformer for Railway Traction Applications

Balanced transformers, Harmonic filters, Reactive power compensation, Traction drives, Railway substations

Prof. Zhiwen Zhang

Accept 09/29/08

14 TPWRD-00752-2007.R2

Evaluation of Thermal Transient and Overload Capability of High-voltage Bushings with ATP

ATP, bushing, modeling, overload, steady state, thermal transient

Dr. Shibao Zhang

Accept 09/08/08



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11 Reports of Liaison Representatives 11.1 Standards Coordinating Committee on Electrical Insulation – SCC 04

September 29, 2008

IEEE PES Transformers Committee Liaison Report

For General Session Meeting – October 9, 2008

1. Scope: • To formulate guiding principles for the evaluation of insulation materials and

systems for electrical and electronic applications. • To formulate principles for the identification of insulation materials and systems

based on functional tests and/or experience. • To coordinate the preparation of standards for functional test programs and

diagnostic methods for the evaluation of insulation materials and systems.

2. Activities – all publications are current:

2.1. IEEE 1-1986 (R2005) Recommended Practice – General Temperature Limits in the Rating of Electrical Equipment and for the Evaluation of Electrical Insulation

2.2. IEEE 98-1984 (R2007) Standard for the Preparation of Test Procedures for the

Thermal Evaluation of Solid Electrical Insulating Materials

2.3. IEEE 99-2007 Recommended Practice for the Preparation of Test Procedures for the Thermal Evaluation of Insulation Systems for Electrical Equipment

3. Participation: Anyone interested in joining the Subcommittee should contact:

Paulette Payne Powell Chairperson SCC 04 [email protected]

Respectfully submitted, Paulette Payne Powell



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11.3. Cigré liaison The last Cigré session was held in Paris last August. The transformer meeting was attended by more than 350 delegates.

11.3.1. Session report Three preferential subject were exposed during the session.

• PS1 : Performance in service of new insulation systems for transformers 5 papers dealing with high fire point liquids, SF6 insulated transformers and high temperature insulating material were submitted. Works on bubbling temperature of natural ester depending on moisture were presented with the conclusion that not only the moisture content but also the rate of the temperature rise is a significant factor. The difference streaming behavior of natural ester compared to mineral oil was supported by some test evidence especially when large gaps are concerned. This is of importance for the high voltage application of vegetable oil transformers. A new potential benefit of a using higher viscosity oil was presented. With the same oil flow the temperature pattern of zigzag flow windings are much more homogeneous than with mineral oil. The high viscosity forces the oil to a more even distribution between the different paths. On SF6 transformers some new techniques similar to the conventional DGA were presented. It is now possible to asses the transformers fault through a gas sample. Some new improvement on DGA for silicone fluid was also presented.

• PS2 Reliability and risk assessment of transformer in service 19 paper will be included in the proceeding on this subject. Many different strategy for refurbishment were presented going from equipment only to full replacement of coils. Most of them expecting at least 40 years of life for the refurbish unit. Standardization of the transformer types was unanimously presented as large benefits for cost and design review extend, and replacement and spare availability. A new condition assessment method of the cellulose based solid insulation using methanol seems to be promising. New treatments for corrosive oil were exposed such as the passivator seems to be deceptive. The new treatments try to remove the corrosive compound from the actual oil.

• PS3 Reactors Field experience on reactors is split 50/50 between satisfied and unsatisfied users. Some users and manufacturers presented their feed back and new development.



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11.3.2. Highlights of the further activities In 2007 activities were related to preparation of the brochures for the recommendations for the condition monitoring. The advisory group “UHV AC & DC Transformers” has been involved in the Chinese symposium and supports the A3.22working group in charge of the recommendations for substation equipment over 800 kV. In 2007, three new working groups have been created in the domain of:

• Transformer procurement process • Transformer reliability survey • Transformer thermal modeling

11.3.3. Main technical directions pursued The two strategic directions of SC A2 are: • To continue on transformer technology issues and to consider new information technologies (data, communication, web services) •To provide services to CIGRE customers (reliability and availability including impact of accessories, life management, economical issues, tutorials, etc).

11.3.4. Working group and task force reports Full progress report, scope and membership of the different groups are on the WEB site of A2 WG A2-26 - Mechanical condition assessment of windings (P. Picher) created in 2004. The CIGRE Working Group A2.26 main objective is to develop a guide on the mechanical condition assessment of transformer windings using the Frequency Response Analysis (FRA) method. The WG has delivered its final report for publication Part of its work will be proposed for publication in IEC. WG A2-27 - Recommendations for condition monitoring facilities (P. Jarman) created as TF in 2003 and as WG in 2005. The final report has been delivered for publication Part of its work will be proposed for publication in IEC. TF A2-30 - Moisture in transformer (V. Sokolov) created in 2004. This WG has delivered its final report for publication. WG A2-24 - Thermal performances (J. Declerq) created in 2003. The WG is considering: fundamentals of thermal ageing of insulation system, thermal modeling of transformers (for monitoring system) and thermal testing of transformers (contribution to measuring uncertainties at heat run tests). The final draft is under revision We expect a closing of this group in 2008. WG A2-32 - Copper sulphide in power transformer insulation (M. Dahlund) created in 2005. The test methods proposed by this working group have been adopted by IEC TC 10 for the IEC 62225. The working group will continue to find analysis method for metal passivator and



Page 122 of 155

study their stability in service. A new subject is also to work on the experience of the mitigation techniques. Work expected to be accomplished in 2009 WG A2-33 - Fire Safety (A. Petersen/AU) The aim is to prepare recommendations to minimize the risk of fires and collateral damages associated with transformer fires. The scope shall cover different parts, mainly: a) Avoidance of tank rupture, b) Precaution to fire victim and c) Precautions to fire origin WG A2-34 Guide for Transformer Maintenance (C. Rajotte/CA) The aim is to prepare a guide for transformer maintenance that will help transformer users to define and apply best practices for transformer maintenance ( transformer over 69 kV and 25MVA). The Scope shall: a) define a best practices list of periodic actions applied on line or off line, b) address condition based maintenance and c) human and material aspects of transformer maintenance, with maintenance planning, maintenance tasks tracking, maintenance resources, cost references, level of competences required for different tasks, training, on-site repair, etc. WG A2-35 Experiences in service with new liquids (R. Martin/UK) created 2007 The aim is to collate and review the in-service experience of using the new fluids in a way which is relevant and beneficial to the electrical industry. The work is split in: a) Physical and chemical and electrical properties b) Design considerations, c) Review of experiences of these new fluids and with which transformers, d) Review and relevance of existing tests e) Maintenance and retrofilling f) Reliability and longevity and interaction with solids. WG A2-36 Guide for transformer procurement process (T Brekenbridge/UK) created 2008 The aim is to carry out a full review of the existing A2 document on procurement and to prepare a new guide for assessing the manufacturer capability. WG A2-37 Transformer reliability survey (S. Tenbohlen/DE) created 2008 The aim is to prepare a brochure with international reliability survey practices. There will be no new survey, but publicly available data’s will be used. The working group will : a) Review all available national survey and study the report practices. b) Discuss the differences and identify the best practices c) compile and present available information d)make recommendation for improvement. WG A2-38 Transformer Thermal Modeling (J.Lapworth/UK) created 2008 The aim is to describe the state of the art in thermal modeling of transformers specially as far as hot spot is concerned. Example of advanced modeling tools will be included as well as direct measurement practices. JWG A2/B4 HVDC Transformers (M.Saravolac/ FR) created 2004 The activities of this WG are focused on publication of a brochure for design review of HVDC transformers.

11.3.5. Publications • State-of-the-art report on ‘Fire Avoidance in Transformer Substation’, prepared by Prof. D. Allan with the support of J. Declerq and A. Petersen —published in Electra — April 2007.



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• Technology advisory group report — “Power Transformer Technology Review and Assessment” —published in Electra – February 2008 • Final report/brochure of WG A2-27 — “Recommendations for condition monitoring facilities” —published in Electra – April 2008 • Final report/brochure of WG A2-30 — “Moisture in transformer” — to be published – first part of 2009 • Final report/brochure of WG A2-36 — “Mechanical condition Assessment of Transformer Winding” — to be published – 2008

11.3.6. next meetings 17th to 21st August 2009, the SC meeting will take place in Cape Town (ZA) with a joint colloquium SC A2/A3/B3 with the following subject : “Reliability and Availability Management”



Page 124 of 155

Revised 10 September

IEEE/PES TRANSFORMERS COMMITTEE www.transformerscommittee.org

Fall 2008 Meeting; 5-9 October 2008 Porto Palácio Congress Hotel & Spa; Porto, Portugal

Hosted by EFACEC

NOTES: The schedule of this meeting is "shifted" one hour later than previous meetings. A vertical line in the left margin indicates a noteworthy revision since last revision.

See Page 5 for a key to abbreviations. DATE/TIME

ACTIVITY

SUB- COM

ACTIVITY CHAIR

ROOM CAP/ARR/AV

MEETING ROOM (Floor)

Saturday, October 4 (no meeting registration this day) No Meeting Registration, No Meetings, No Social Events

Sunday, October 5 "Golf Event" CANCELED 9:00 am - 3:00 pm "Porto City Tour". Advance registration required. Limited attendance (limited to one bus).

-- Open to attendees and companions. Lunch "on your own" at the cafes. -- The bus will depart the Palácio Hotel at 9:00 am and return by 3:00 pm. -- Includes a visit to the Historic City Centre, Sé Cathedral, Port Wine Cellars, Cafes on the banks of the Douro River, Stock Exchange Palace, and Clerigos Church.

2:00 pm - 6:00 pm Meeting Registration Foyer, Piso 1

3:30 pm - 6:30 pm Administrative SC -- closed meeting, by invitation only

Admin. T. Prevost 24 US (w/snack buffet)

Douro, Piso 1

7:00 pm - 9:30 pm Welcome Reception -- All Attendees & Companions are Welcome! -- Appropriate dress recommended

300 Reception Porto, Piso 1

Monday, October 6 -- Monday Breaks Sponsored by Amorim Cork Composites, S.A. *** Attendee and companion breakfasts are "on your own" (generally provided by your hotel) 9:00 am - 5:00 pm Companion Tour: "Guimarães and Braga Cities". Includes lunch.

-- Advance registration required. Buses depart the Palácio Hotel at 9:00 am and return around 5:00 pm. 8:00 am - 5:00 pm Meeting Registration Foyer, Piso 1 8:00 am - 7:00 pm Internet Cafe' 10 BR Sousa, Piso 2 8:00 am - 8:50 am Newcomers Orientation Breakfast Meeting

-- Newcomers & Guests are encouraged to attend -- Arrive early! (suggest arrive at 7:45 am)

E. Smith 50 CL Le Coin Restaurant Piso -1

8:30 am - 10:15 am IEC TC-14 Technical Advisory Group (all interested individuals welcome)

++ P. Hopkinson 40 CL 3 Rios, Piso 1

9:00 am - 10:15 am WG Dry-Type Reactors C57.16 Dry R. Dudley 30 CL Corgo, Piso 2 9:00 am - 10:15 am TF Arc Furnace Transformers C57.17 Power D. Corsi 30 CL Tâmega, Piso 2 9:00 am - 10:15 am TF Electrical Partial Discharge

Measurements Guide C57.113 DiTests E. Lemke 100 CL Douro, Piso 1

9:00 am - 10:15 am Short Circuit Tests Guide C57.133 and revision to C57.12.90, Section 12

PCS M. Fortin 150 CL S3 Porto, Piso 1

10:15 am - 10:30 am Break (beverages only) Foyers, Piso 1 *** Contact Joe Watson ([email protected]) if you are interested in sponsoring coffee-breaks at a future meeting.



Page 125 of 155

DATE/TIME

ACTIVITY

SUB- COM

ACTIVITY CHAIR

ROOM CAP/ARR/AV

MEETING ROOM

Monday, October 6 (continued) 10:30 am - 11:45 am WG Sealed Dry-Type Power

Transformers C57.12.52 Dry S. Kennedy 30 CL Corgo, Piso 2

10:30 am - 11:45 am WG Liquid-immersed Secondary Network Transformers C57.12.40

UTNP B. Klaponski 30 CL Tâmega, Piso 2

10:30 am - 11:45 am TF Transf. Tank Rupture & Mitigation Power P. Zhao 40 CL 3 Rios, Piso 1 10:30 am - 11:45 am TF Furan Tests IL K. Haggerty 100 CL Douro, Piso 1 10:30 am - 11:45 am WG PCS Rev. to Test Code C57.12.90 PCS M. Perkins 150 CL S3 Porto, Piso 1 11:45 am - 12:00 pm Break (beverages only) Foyers, Piso 1 12:00 pm - 1:15 pm WG 3-ph Underground Distribution

Transformers C57.12.24 UTNP G. Termini 30 CL Corgo, Piso 2

12:00 pm - 1:15 pm SC HVDC Converter Transformers and Smoothing Reactors

HVDC R. Dudley 30 CL Tâmega, Piso 2

12:00 pm - 1:15 pm WG Control Cabinets PC57.148 Power J. Watson 40 CL 3 Rios, Piso 1 12:00 pm - 1:15 pm WG Thermal Evaluation of Power and

Distribution Transformers C57.100 IL R. Wicks 100 CL Douro, Piso 1

12:00 pm - 1:15 pm WG Revision to Low Frequency Tests DiTests B. Poulin 150 CL S3 Porto, Piso 1 1:15 pm - 2:30 pm Standards Development Review Luncheon Meeting

(Special Topic): "An Overview of IEC Transformer Standards and the New Dual Logo Process". -- Everyone is encouraged to attend. -- Advance reservation required. -- No paper tickets. Admission verified at the door.

B. Bartley and J. Sim

100 RT (8/tbl) Madruga Restaurant Piso -1

2:45 pm - 4:00 pm WG Thermal Evaluation C57.12.56/60 Dry R. Wicks 30 CL Corgo, Piso 2 2:45 pm - 4:00 pm WG Bar Coding C57.12.35 Dist G. Termini 30 CL Tâmega, Piso 2 2:45 pm - 4:00 pm WG Tap Changer Performance C57.131 Power W. Henning 40 CL 3 Rios, Piso 1 2:45 pm - 4:00 pm TF Special Dielectric Test Issues DiTests B. Forsyth 100 CL Douro, Piso 1 2:45 pm - 4:00 pm WG Frequency Response Analysis

(FRA) Guide PC57.149 PCS C. Sweetser 150 CL S3 Porto, Piso 1

4:00 pm - 4:15 pm Break (beverages and treats) Foyers, Piso 1 4:15 pm - 5:30 pm TF High Temp. Transformers (New!) IL R. Marek 30 CL Corgo, Piso 2 4:15 pm - 5:30 pm WG Transformer Paralleling Guide Power T. Jauch 30 CL Tâmega, Piso 2 4:15 pm - 5:30 pm WG Revision to Impulse Tests DiTests P. Riffon/

P. Heinzig 40 CL 3 Rios, Piso 1

4:15 pm - 5:30 pm WG PCS Revisions to C57.12.00 PCS S. Snyder 100 CL Douro, Piso 1 4:15 pm - 5:30 pm TF IEEE-IEC Cross Reference Stds J. Sim 150 CL S3 Porto, Piso 1 5:30 pm - 5:45 pm Break (beverages only) Foyers, Piso 1 5:45 pm - 7:00 pm Presentation #1: "Indoor Measurement of Transformer Noise Using

Sound Pressure and Sound Intensity Methods", by Don Chu, Ramsis Girgis, Chris Ploetner. Sponsored by ASV. **

200 CL S3 (add 50 TH seats in rear)

Porto, Piso 1

** Contact N. Kent Haggerty ([email protected]) if you are interested in making a technical presentation at a future meeting.



Page 126 of 155

DATE/TIME

ACTIVITY

SUB- COM

ACTIVITY CHAIR

ROOM CAP/ARR/AV

MEETING ROOM

Tuesday, October 7 -- Tuesday Breaks Sponsored by LDIC Group *** Attendee and companion breakfasts are "on your own" (generally provided by your hotel) 9:00 am - 5:00 pm Companion Tour: "Aveiro, The Venice of Portugal". Includes lunch.

-- Advance registration required. Buses depart the Palácio Hotel at 9:00 am and return around 5:00 pm. 8:00 am - 5:00 pm Meeting Registration Foyer, Piso 1 8:00 am - 7:00 pm Internet Cafe' 10 BR Sousa, Piso 2 9:00 am - 10:15 am WG Test Requirements for HV

Instrument Transformers C57.13.5 IT R. McTaggart/

P. Riffon 30 CL Corgo, Piso 2

9:00 am - 10:15 am WG Phase-shift Transf. Guide C57.135 Power J. Sim 30 CL Tâmega, Piso 2 9:00 am - 10:15 am (TBD) 40 CL 3 Rios, Piso 1 9:00 am - 10:15 am WG Switching Transients Induced by

Transf./Breaker Interaction PC57.142 PCS R. Degeneff 100 CL Douro, Piso 1

9:00 am - 10:15 am WG PC57.152 Field Test Guide (Rev. IEEE 62)

Stds J. Verner 150 CL S3 Porto, Piso 1

10:15 am - 10:30 am Break (beverages only) Foyers, Piso 1 10:30 am - 11:45 am WG Loss Evaluation Guide for

Distribution Transformers (New!) Dist A. Traut/

D. Duckett 30 CL Corgo, Piso 2

10:30 am - 11:45 am TF Functional Life Tests, De-energized Tap Changers (DETC)

Power P. Hopkinson 30 CL Tâmega, Piso 2

10:30 am - 11:45 am TF GSU Bushing Standardization Bush C. Hurley 40 CL 3 Rios, Piso 1 10:30 am - 11:45 am TF DGA Natural Ester Fluids IF P. Boman 100 CL Douro, Piso 1 10:30 am - 11:45 am WG Revision to Loading Guide C57.91 IL T. Raymond 150 CL S3 Porto, Piso 1 11:45 am - 12:00 pm Break (beverages only) Foyers, Piso 1 12:00 pm - 1:15 pm WG Loss Tolerance and Measurement PCS E. teNyenhuis 30 CL Corgo, Piso 2 12:00 pm - 1:15 pm TF External Dielectric Clearances DiTests E. Davis 30 CL Tâmega, Piso 2 12:00 pm - 1:15 pm TF Transformer Efficiency and

Loss Evaluation (DOE Activity) Dist P. Hopkinson 40 CL 3 Rios, Piso 1

12:00 pm - 1:15 pm WG Guide for DGA in LTCs C57.139 IF F. Jakob 100 CL Douro, Piso 1 12:00 pm - 1:15 pm WG Temperature Rise Test Procedures

in Section 11 of C57.12.90 IL P. Powell 150 CL S3 Porto, Piso 1

1:15 pm - 2:30 pm Speaker Luncheon: "Wind Power & Other Renewables", by Professor António Sá da Costa -- Advance registration is necessary. -- Paper tickets are not provided. Admission verified at the door.

150 CL (8/tbl) with elevated table for 5

Madruga Restaurant Piso -1

2:45 pm - 4:00 pm WG Revision to IEEE 638 Power C. Swinderman 30 CL Corgo, Piso 2 2:45 pm - 4:00 pm WG HVDC Bushings C57.19.03 Bush L. Recksiedler 30 CL Tâmega, Piso 2 2:45 pm - 4:00 pm WG Voltage Step Regulators C57.15 Dist Colopy/Kennedy 40 CL 3 Rios, Piso 1 2:45 pm - 4:00 pm WG Dielectric Test Tables, Liquid-filled DiTests P. Hopkinson 100 CL Douro, Piso 1 2:45 pm - 4:00 pm WG Revision to Gas Guide C57.104 IF R. Ladroga 150 CL S3 Porto, Piso 1 4:00 pm - 4:15 pm Break (beverages and treats) Foyers, Piso 1 *** Contact Joe Watson ([email protected]) if you are interested in sponsoring coffee-breaks at a future meeting.



Page 127 of 155

DATE/TIME

ACTIVITY

SUB- COM

ACTIVITY CHAIR

ROOM CAP/ARR/AV

MEETING ROOM

Tuesday, October 7 (continued) 4:15 pm - 5:30 pm WG Semiconductor Rectifier

Transformers C57.18.10 PCS S. Kennedy 30 CL Corgo, Piso 2

4:15 pm - 5:30 pm TF Moisture Estimation in Transformer Insulation (New!)

IL J. Sim 30 CL Tâmega, Piso 2

4:15 pm - 5:30 pm WG Sound Level Measurement Guide ASV J. Puri 40 CL 3 Rios, Piso 1 4:15 pm - 5:30 pm TF Field Applications of Natural

Ester Fluids IF J. Graham 100 CL Douro, Piso 1

4:15 pm - 5:30 pm WG Transportation Issues Guide Power G. Anderson 150 CL S3 Porto, Piso 1 5:30 pm - 5:45 pm Break (beverages only) Foyers, Piso 1 5:45 pm - 7:00 pm Presentation #2: "Frequency Conversion Factors of Measured

Transformer Performance Parameters", by Ramsis Girgis and Ed teNyenhuis. Sponsored by PCS. **

200 CL S3 (add 50 TH seats in rear)

Porto, Piso 1

Wednesday, October 8 -- Wednesday Breaks Sponsored by (TBD) *** No Meeting Registration, No Companion Tours, No EL&P Delegation Meeting Attendee and companion breakfasts are "on your own" (generally provided by your hotel) 8:00 am - 7:00 pm Internet Cafe' 10 BR Sousa, Piso 2 9:00 am - 10:15 am Joint WG Optical Instrument

Transformers C57.13/PSIM P1601 IT/PSIM Rahmatian/

Gilleland 30 CL 3 Rios, Piso 1

9:00 am - 10:15 am SC Audible Sound & Vibration ASV J. Puri 100 CL Douro, Piso 1 9:00 am - 10:15 am SC Insulation Life IL D. Platts 150 CL S3 Porto, Piso 1 10:15 am - 10:30 am Break (beverages only) Foyers, Piso 1 10:30 am - 11:45 am SC Instrument Transformer IT J. Smith 30 CL 3 Rios, Piso 1 10:30 am - 11:45 am SC Distribution Transformers Dist K. Hanus 100 CL Douro, Piso 1 10:30 am - 11:45 am SC Power Transformers Power T. Lundquist 150 CL S3 Porto, Piso 1 11:45 am - 12:00 pm Break (beverages only) Foyers, Piso 1 12:00 pm - 1:15 pm SC UG Transf. & Network Protectors UTNP C. Niemann 30 CL 3 Rios, Piso 1 12:00 pm - 1:15 pm SC Insulating Fluids IF R. Ladroga 100 CL Douro, Piso 1 12:00 pm - 1:15 pm SC Dielectric Tests DiTests L. Wagenaar 150 CL S3 Porto, Piso 1 1:15 pm - 2:30 pm Lunch (on your own) 2:30 pm - 3:45 pm SC Dry Type Dry C. Johnson 30 CL 3 Rios, Piso 1 2:30 pm - 3:45 pm SC Bushings Bush F. Elliott 100 CL Douro, Piso 1 2:30 pm - 3:45 pm SC Performance Characteristics PCS R. Girgis 150 CL S3 Porto, Piso 1 3:45 pm - 4:00 pm Break (beverages and treats) Foyers, Piso 1 4:00 pm - 5:15 pm SC Transformer Standards Stds B. Bartley 150 CL S3 Porto, Piso 1 7:00 pm - 11:00 pm Dinner Social: Dinner at the "Taylor's Winery". Advance registration is necessary.

-- Buses begin boarding at the Palácio Hotel at 6:30 pm. The last bus departs the hotel at 7:00 pm. All buses return to the hotel before 11:00 pm. -- Paper tickets will not be provided. Admission will be verified with a list as you board the bus. -- Appropriate dress recommended.

** Contact N. Kent Haggerty ([email protected]) if you are interested in making a technical presentation at a future meeting. *** Contact Joe Watson ([email protected]) if you are interested in sponsoring coffee-breaks at a future meeting.



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KEY Note: A PC projector will be furnished in each meeting room. Arrive early to ensure that equipment operates/syncs correctly. Overhead projectors are available in the meeting registration area. > -- activity continued into another session / from another session CL -- classroom seating (w/head table for 2) ++ -- not a Transformers Committee activity TBD = "To Be Determined" TH -- theater seating (with head table for 2) FC = flip chart; S1 = sound (see note) RT -- multiple roundtables (8/table max) S2 = stand mic in front only; S3 = one stand mic in front & stand mic(s) at mid-room US -- U-shape table BR -- boardroom arrangement DATE/TIME

ACTIVITY

SUB- COM

ACTIVITY CHAIR

ROOM CAP/ARR/AV

MEETING ROOM

Thursday, October 9 No Meeting Registration, No Companion Tours, No Internet Cafe', No EPRI Meeting Attendee and companion breakfasts are "on your own" (generally provided by your hotel) 9:00 am - 10:30 am > General Session, Transformers Committee

-- All attendees are encouraged to attend. -- See separate document for meeting agenda.

T. Prevost 200 CL S1 elevat. table for 4

Porto, Piso 1

10:30 am - 10:45 am Break (beverages only) Foyers, Piso 1 > 10:45 am - 12:30 pm General Session, Transformers Committee T. Prevost 200 CL S1 Porto, Piso 1 Lunch, "on your own" 2:00 pm - 5:00 pm Technical Tour: EFACEC Transformers Factory. All attendees and companions are welcome.

Buses will depart the Palácio Hotel at 2:00 pm and return around 5:00 pm. Eat lunch beforehand. Does NOT include dinner. The tour of the Rede Electrica Nacional (REN) electrical substation is canceled.

Friday, October 10 No Transformer Committee Meetings, No Internet Cafe', No EPRI Meeting 9:00 am - 6:30 pm Social Tour: "Tour of Douro Valley Region". Includes lunch only. Does NOT include dinner).

-- Advance registration required. Buses depart the Palácio Hotel at 9:00 am and return around 6:30 pm.



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7 Sept 2008

IEEE/PES TRANSFORMERS COMMITTEE

General Session - Fall 2008 Meeting Thursday, 9 October 2008

_____________________________________________________________________________

Chair: Thomas A. Prevost Vice Chair: J. Edward Smith Secretary: Bill Chiu _____________________________________________________________________________ 1. Chair’s Remarks and Announcements Thomas A. Prevost

2. Approval of Minutes from Spring 2008 Meeting Thomas A. Prevost

3. Administrative Subcommittee Thomas A. Prevost

4. Vice Chair’s Report J. Edward Smith

5. Transformer Standards William H. Bartley

6. Recognition and Awards Donald J. Fallon

7. New Business (continued below) Thomas A. Prevost

8. Report of Technical Subcommittees 8.1. Underground Transformers & Network Protectors Carl G. Niemann 8.2. Audible Sound and Vibration Jeewan L. Puri 8.3. Bushings Fred E. Elliott 8.4. Dry Type Transformers Charles W. Johnson 8.5. Distribution Transformers Kenneth S. Hanus 8.6. Dielectric Tests Loren B. Wagenaar 8.7. HVDC Converter Transformers & Reactors Richard F. Dudley 8.8. Instrument Transformers James E. Smith 8.9. Insulating Fluids Richard K. Ladroga 8.10. Insulation Life Donald W. Platts 8.11. Performance Characteristics Ramsis S. Girgis 8.12. Power Transformers Thomas G. Lundquist

9. Editor’s Report John C. Crouse

10. Meetings Planning Subcommittee Gregory W. Anderson

11. Reports of Liaison Representatives 11.1. Standard Coordinating Committee No. 4 Paulette Payne Powell 11.2. IEC TC-14 Technical Advisor to USNC Philip J. Hopkinson 11.3. CIGRE Jean-Christophe Riboud

12. Old Business Thomas A. Prevost

13. New Business (further discussion as needed) Thomas A. Prevost



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Page 1 of 25

IEEE / PES /TRANSFORMERS COMMITTEE

Standards Report To: Members of IEEE Transformers Committee

From: Bill Bartley, Standards Coordinator

Date: October 1, 2008

Re: Transformer Standards Activity since March, 2008

Executive Summary This report covers the Standards activity for the six-month period of March to October 1, 2008. The Transformer Committee is responsible for approximately 96 active standards, plus 45 projects for new standards and revisions. In the last six months, two New standards, five Revised standards, and five Reaffirmations were approved by REVCOM. Also, five PARs and two PAR extensions were approved by NESCOM. However, we have seven standards which may expire at the end of this year; and we have three PAR’s which may expire at the end of this year.

In this Report: I. Standards Board Activity (NESCOM & REVCOM)

A. NESCOM recommendations ........................ pg 1 B. REVCOM recommendations........................ pg 2 C. TC Stds on December 2008 Agenda .......... pg 3 D. Standards Bd 2009 Meeting Calendar........ pg 4

II. Transformer Ballot Status............................... pg 5 III. Transformer PAR’s active .............................. pg 6-7 IV. Transformer Stds Status database .................. pg 8- 23 V. Transformer Stds Org Chart ........................... pg 24-25

I. Standards Board Activity

A. NESCOM Recommendations (New Standards Committee)

1, NEW PARs approved PC57.153 Guide for Transformer Paralleling (March)

Approved new PAR until December 2012 2. PARs for the Revisions of Standards PC57.12.23 Standard for Submersible Single-Phase Transformers: 167 kVA and Smaller; High Voltage 25 000 V and Below; Low Voltage 600 V and Below (June) Approved modification of the PAR until December 2009

PC57.12.80 Standard Terminology for Power and Distribution Transformers (June ) Approved PAR for revision until December 2012

PC57.21 Standard Requirements, Terminology, and Test Code for Shunt Reactors Rated Over 500 kVA (March) (This revised standard was also approved in March 2008)

PC57.152 Guide for Diagnostic Field Testing of Fluid Filled Power Transformers, Regulators & Reactors (May) (Early consideration):

Approved PAR for the revision of the old IEEE 62 until December 2012



Page 131 of 155

Page 2 of 25

NESCOM Recommendations continued

3. PAR Extension Requests PC57.148 Standard for Control Cabinets for Power Transformers (September ) Approved request for two year extension until December 2010 PC57.149 Guide for the Application and Interpretation of Frequency Response Analysis for Oil Immersed Transformers (September ) Approved request for two year extension until December 2012 4. PARs EXPIRING Dec. 31 - 2008 PC57.12.10 Standard Requirements for Liquid-Immersed Power Transformers

(Std is already withdrawn; PAR expires 12-31-08) [Power Transformer SC]

PC57.100 Standard Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution and Power Transformers (Std and PAR expires 12-31-08) [Insulation Life SC]

PC57.150 Guide for the Transportation of Transformers and Reactors Rated 10,000 kVA or larger (new project; PAR expires 12-31-08) [Power Transformer SC]

B. REVCOM Recommendations (Standards Review Committee)

1. NEW Transformer Standards Approved PC57.18.10a Standard Practices and Requirements for Semiconductor Power Rectifier

Transformers - Amendment: Technical and Editorial Corrections (March) PC57.147 Guide for Acceptance & Maintenance of Natural Ester Fluids in Transformers (May) 2. Revisions Approved C57.12.51 Standard for Ventilated Dry-Type Power Transformers, 501 kVA and Larger, Three-

Phase, with High-Voltage 601 to 34500 Volts; Low-Voltage 208Y/120 to 4160 Volts - General Requirements (September)

C57.13 Standard Requirements for Instrument Transformers (March)

C57.21 Standard Requirements, Terminology, and Test Code for Shunt Reactors Rated Over 500 kVA (March)

C57.110 Recommended Practice for Establishing Liquid-Filled and Dry-Type Power and Distribution Transformer Capability When Supplying Nonsinusoidal Load Currents (March)

C57.104 Guide for the Interpretation of Gasses Generated in Oil-Immersed Transformers (September)

3. Reaffirmations Approved C57.12.32 Standard for Submersible Equipment - Enclosure Integrity (March)

C57.12.58 Guide for Conducting a Transient Voltage Analysis of a Dry-Type Transformer Coil (September)



Page 132 of 155

Page 3 of 25

REVCOM Recommendations - continued (Reaffirmations) C57.105 Guide for Application of Transformer Connections in Three-Phase Distribution Systems

(March)

C57.109 Guide for Liquid-Immersed Transformer Through-Fault-Current Duration (March)

C57.119 Recommended Practice for Performing Temperature Rise Tests on Oil-Immersed Power Transformers at Loads Beyond Nameplate Ratings (March)

44.. TTrraannssffoorrmmeerr SSttaannddaarrddss tthhaatt aarree EExxppiirriinngg aatt eenndd ooff 22000088

C57.12.56-1986 IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers This standard is being merged with C57.12.60; and 12.56 will be Administratively withdrawn. [Dry]

C57.12.80- Standard Terminology for Power and Distribution Transformers There is an active PAR for the Revision; work is in progress, and a ballot pool formed. [Stds]

PC57.18.10 Standard Practices and Requirements for Semiconductor Power Rectifier Transformers A Reaffirmation Ballot Invitation was opened in September 2008. [PCS]

C57.100 Standard Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-Immersed Distribution and Power Transformers (Std and PAR expires 12-31-08) Needs PAR extension NOW. [Ins Life]

C57.111 Guide for Acceptance of Silicone Insulating Fluid and Its Maintenance in Transformers There is no active PAR for Revision; and evidently no work in progress. [Ins Fluids]

C57.121-1998 IEEE Guide for Acceptance and Maintenance of Less-Flammable Hydrocarbon Fluid in Transformers This standard was balloted (Reaffirmation) in July 2008. It is currently in Comment Resolution stage. [Ins Fluids]

C57.124-1991 (R2002) IEEE Recommended Practice for the Detection of Partial Discharge and the Measurement of Apparent Charge in Dry-Type Transformers A Reaffirmation Ballot Invitation was opened in September 2008. [Dry]

C. December 2008 Agenda for REVCOM and NESCOM

As of Oct 1, the Agenda for December ’08 meeting of RevCom and NesCom has not been published. (An agenda has been released for a Standards Board Early Consideration teleconference, on 27 October 2008. But, there are no Transformer Committee standards on the Agenda.)

D. 2009 Standards Board Meeting Schedule

Standards Bd Meeting Deadline for Submissions

March 17-19 6 February 2009

June 15-17 7 May 2009

September 9-11 31 July 2009

December 7-9 19 October 2009



Page 133 of 155

Page 4 of 25

2009 Standards Board Calendar



Page 134 of 155

Page 5 of 25

II. Transformer Ballot Status as of October 1, 2008 (from myBallot™) Sub

committee PAR or

Standard # Title Ballot Status Notes

PreBallot Standards- C57.12.00 Cont. Rev of Std General

Requirements PreBallot Ballot opened Sept 30 ‘08

closes Oct 30 ‘08 UTNP C57.12.24 Standard for Submersible, 3-Phase

Transformers, < 3750 kVA PreBallot Ballot opened Sept 9 -

Closes Oct 9’ 08 Standards- C57.12.80 Standard Terminology for Power and

Distribution Transformers PreBallot Ballot Pool Invitation Issued

Standards- C57.12.90 Cont. Rev of Std Test Code PreBallot Ballot opened Sept 30 ‘08 closes Oct 30 ‘08

PCS- C57.18.10 (Reaff) Requirements for Semiconductor Power Rectifier Transformers

PreBallot Reaff Ballot Pool Invitation opened Sept 12 ‘08

Di Tests C57.113 Rec Practice for PD Measurement in Liquid-Filled Pwr Trfmers & Shunt Rx

PreBallot Copyright issues

PCS- PC57.142 Describe the Occurrence And Mitigation Of Switching Transients

PreBallot

Dry C57.124 Rec Prac for Detection of PD in Dry Tx PreBallot Reaff Ballot Pool Invitation opened Sept 19 ‘08

Comment Resolution InsFluid- C57.121 Guide for Acceptance and

Maintenance of Less-Flammable Hydrocarbon Fluid in Transformers

Comment Resolution

Reaff Ballot closed July 2 08

PCS PC57.123 Guide for Transformer Loss Measurement

Comment Resolution

Hold up due to dual Logo process

UTNP C57.12.23 Standard for Submersible Single-Phase Transformers <167 kVA

Comment Resolution

Ballot closed June 6, 08

Submitted to Revcom Dist- C57.12.32-2002 Submersible Equipment Enclosure Integrity

(Reaff) Submitted to Revcom

REVCOM Approved Mar 08

InsLife- C57.119-2001 Temperature Rise Tests at Loads Beyond Nameplate (Reaff)

Submitted to Revcom


PCS - C57.105-1978 Guide for Application of Connections in 3ph Dist Systems (Reaff)

Submitted to Revcom


PCS - C57.109-1993 Guide for Liquid-Immersed Transformer Through-Fault-Current Duration (Reaff)

Submitted to Revcom


InsFluid- PC57.147 Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers (New)

Submitted to Revcom

REVCOM Approved MAY 08

DryType- PC57.12.51 Standard for Ventilated Dry-type Power Transformers (Rev)

Submitted to Revcom

REVCOM Approved September 08

DryType- PC57.12.58 Guide for Conducting a Transient Voltage Analysis of Dry-Type Transformer Coil (Reaff)

Submitted to Revcom


Instrument- PC57.13 Standard Requirements for Instrument Transformers (Rev)

Submitted to Revcom

REVCOM Approved March 08

PCS - PC57.18.10a Amendment to -- Requirements for Semiconductor Power Rectifier Transformers

Submitted to Revcom


PCS - PC57.21 Revision - Reqs, Terminology, and Test Code for Shunt Reactors (Rev)

Submitted to Revcom


Ins Fluid- PC57.104 Guide for Interpretation of Gases (Rev) Submitted to Revcom


PCS - PC57.110 Revision - Rec Prac for Establishing Tx Capability when Supplying Nonsinusoidal Load Currents (Rev)

Submitted to Revcom




Page 135 of 155

Page 6 of 25

III.. Transformer Committee - Active PARs as of October 1, 2008

P 638 Standard for Qualification of Class 1E Transformers for Nuclear Power Generating

Stations Dec 2011

P1277 Standard General Requirements and Test Code for Dry-Type and Oil-Immersed Smoothing Reactors for DC Power Transmission

Dec 2009

PC57.12.00 Standard General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers

Dec 2011 Ballot opened Sept 30 ‘08

PC57.12.10 Standard Requirements for Liquid-Immersed Power Transformers Dec 2008

PC57.12.20 Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller Dec 2010

PC57.12.23 Standard for Submersible Single-Phase Transformers Dec 2009 Ballot closed June 6’ 08

PC57.12.24 Standard for Submersible, Three-Phase Transformers, 3750 kVA and Smaller Dec 2011 Ballot opened Sept 08

PC57.12.30 Standard for Pole-Mounted Equipment - Enclosure Integrity for Coastal Environments

Dec 2011

PC57.12.31 Standard for Pole Mounted Equipment - Enclosure Integrity Dec 2011 PC57.12.34 Standard for Requirements for Pad-Mounted, Compartmental Type, Self Cooled,

Three Phase Distribution Transformers, 5 MVA and Smaller; High Voltage, 34.5kV Nominal System Voltage and Below; Low Voltage, 15kv Nominal System Voltage and Below

Dec 2009

PC57.12.38 Standard for Padmounted Type, Self-Cooled, Single Phase Distribution Transformers; High Voltage, 34500 GrdY/19920 Volts and below, Low voltage, 240/120 Volts; 167 kVA and smaller

Dec 2009

PC57.12.40 Standard for Network, Three-Phase Transformers, 2500 kVA and Smaller; High Voltage, 34 500 GrdY/19 920 and Below; Low Voltage, 600 Volts and and Below; Subway and Vault Types (Liquid Immersed)

Dec 2011

PC57.12.51 Standard for Ventilated Dry-type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 to 34500 Volts; Low-Voltage 208Y/120 to 4160 Volts - General Requirements

Balloted and approved 9/08

PC57.12.52 Standard for Sealed Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 to 34500 Volts, Low-Voltage 208Y/120 to 4160 Volts- General Requirements

Dec 2011

PC57.12.60 Standard Test Procedure for Thermal Evaluation of Insulation Systems for Dry Type Power and Distribution Transformers, Including Open-Wound, Solid-Cast and Resin Encapsulated Transformers

Dec 2009

PC57.12.70 Standard Terminal Markings and Connections for Distribution and Power Transformers Dec 2011

PC57.12.80 Standard Terminology for Power and Distribution Transformers Dec 2012 Ballot pool formede

PC57.12.90 Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

Dec 2011 Ballot opened Sept 30 ‘08

PC57.12.91 Standard Test Code for Dry-Type Distribution and Power Transformers Dec 2010 PC57.13.5 Standard of Performance and Test Requirements for Instrument Transformers of a

Nominal System Voltage of 115 kV and Above Dec 2009

PC57.15 Standard Requirements, Terminology, and Test Code for Step-Voltage Regulators Dec 2009 PC57.16 Standard Requirements, Terminology, and Test Code for Dry-Type Air-Core

Series-Connected Reactors Dec 2010

PC57.17 Standard Requirements for Arc Furnace Transformers Dec 2011 PC57.19.03 Standard Requirements, Terminology, and Test Code for Bushings for DC

Applications Rated 110 kV BIL and Above Dec 2011

PC57.19.100 Guide for Application of Power Apparatus Bushings Dec 2010 PC57.32 Std Requirements, Terminology & Test Procedures for Neutral Grounding Devices Dec 2009



Page 136 of 155

Page 7 of 25

Active PARs - continued PC57.91 Guide for Loading Liquid Immersed Transformers and Voltage Regulators Dec 2009 PC57.98 Guide for Transformer Impulse Tests Dec 2009 PC57.100 Standard Test Procedure for Thermal Evaluation of Insulation Systems for Liquid-

Immersed Distribution and Power Transformers Dec 2008 PC57.104 Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers

Balloted and approved 9/08

PC57.113 Recommended Practice for Partial Discharge Measurement in Liquid-Filled Power Transformers and Shunt Reactors Dec 2011

PC57.123 Guide for Transformer Loss Measurement Dec 2011

Hold up due to Dual Logo

PC57.130 Trial-Use Guide for the Use of Dissolved Gas Analysis During Factory Temperature Rise Tests for the Evaluation of Oil-Immersed Transformers and Reactors Dec 2009

PC57.131 Standard Requirements for Tap Changers Dec 2009 PC57.133 Guide for Short-Circuit Testing of Distribution and Power Transformers Dec 2009 PC57.135 Guide for the Application, Specification and Testing of Phase Shifting

Transformers Dec 2011 PC57.139 Guide for Dissolved Gas Analysis in Transformer Load Tap Changers Dec 2009 PC57.142 Guide to Describe the Occurrence and Mitigation of Switching Transients Induced

by Transformer, Switching Device, and System Interaction Dec 2011 PC57.143 Guide for Application for Monitoring Equipment to Liquid-Immersed Transformers

and Components Dec 2010 PC57.148 Standard for Control Cabinets for Power Transformers

Dec 2010 Extension Granted 9/08

PC57.149 Guide for the Application and Interpretation of Frequency Response Analysis for Oil Immersed Transformers Dec 2010

Extension Granted 9/08

PC57.150 Guide for Transportation of Transformers and Reactors Rated > 10,000 kVA Dec 2008 PC57.151 Guide for Sound Level Measurement Guide for Liquid Filled and Dry Type

Transformers and Reactors Dec 2009 PC57.152 Guide for Diagnostic Field Testing of Fluid Filled Power Transformers, Regulators,

and Reactors Dec 2012 PC57.153 Guide for Paralleling Power Transformers Dec 2012

[end]



Page 137 of 155

IEEE/PES TRANSFORMERS COMMITTEEStatus Report of PE/TR Standards

October, 2008Porto, Portugal

STANDARD

PROJECTTITLE

Pub YearRev Due Date

PAR Issue Date

PAR Expiration

Standard StatusRemark

10/01/2008Working Group Chair

EmailPhone

SubCommittee AUDIBLE SOUND & VIBRATIONJ.

(704) 821-6638

[email protected] Puri

P57.151

IEEE Guide for Sound Level Measurement for Liquid Immersed Transformers and Reactors

12/07/200512/31/2010

New Project - Active PAR Std under development

IEC granted permission for use of IEC documents

Puri(704) [email protected]

J.

C57.136 IEEE Guide for Sound Level Abatement and Determination for Liquid- Immersed Power Transformers and Shunt Reactors Rated Over 500 kVA

200012/31/2010

Approved - Reaffirmed September '05

Reaffirmation approved by RevCom on 9/21/2005

Darwin44 1785 [email protected]

A.W.

SubCommittee BUSHINGF. E.

(360) 418-2269

[email protected] ElliottC57.19.00 Standard General Requirements and Test Procedure for

Power Apparatus Bushings200412/31/2009

Approved

Formally Std. IEEE 21Previous revision 1991. D6.1 approved by RevCom in Dec., 2004

Ellis(615) [email protected]

K. P.

C57.19.01 IEEE Standard Performance Characteristics and Dimensions for Outdoor Apparatus Bushings

200012/31/2010

Approved

Formally Std. IEEE 24Reaffirmed in 2005.

Singh(731) [email protected]

P.

C57.19.03

PC57.19.03

IEEE Standard Requirements, Terminology, and Test Code for Bushings for DC Applications

199612/31/2007

12/05/200712/31/2011

Approved with Corrigenda

See Corrigenda -1, Published in 2006New PAR for revision submitted 10/2007PAR approved by Nescom Dec07

Elliott(360) [email protected]

F. E.

C57.19.03-1996/ Standard Requirements, Terminology, and Test Code for Bushing for DC Applications - Corrigendum 1 12/31/2007

Approved

Published 6/6/2006

Elliott(360) [email protected]

F. E.

C57.19.100

PC57.19.100

IEEE Guide for Application of Power Apparatus Bushings

199512/31/2010

03/30/200612/31/2010

Approved - Active PAR for Revision

Revision for C57.19.101-1992New PAR requested and approved to 12/31/2010.

Spitzer(817) [email protected]

T.

Prepared by William Bartley, IEEE PE/TR Std. Coordinator Page 8 of 25



Page 138 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee DIELECTRIC TESTSL. B.

(614) 552-1759

[email protected] WagenaarC57.113

PC57.113

IEEE Guide for Partial Discharge Measurement in Liquid-Filled Power Transformers and Shunt Reactors

199112/31/2007

05/07/200712/31/2011

Active PAR for revision

New PAR approved on 5/7/2007.Ballot Pool Invitation opened Mar 7-08; closed Apr 6-08

Poulin(450) [email protected]

B.

C57.127 IEEE Guide for the Detection of Acoustic Emissions from Partial Discharges in Oil-Immersed Power Transformers

200712/31/2012

Approved - D10.0 approved - in final edit

PAR to Revise IEEE Std C57.127-2000D10.0 approved by SA Board 3/22/2007

Harley(330) [email protected]

J. W.

C57.138 IEEE Recommended Practice for Routine Impulse Test for Distribution Transformers

199812/31/2010

Approved - Reaffirmed in June '05

Reaffirmation approved by RevCom on 6/8/05.

Molden(845) [email protected]

A.

C57.98

PC57.98

IEEE Guide for Transformer Impulse Tests 199412/31/2009

09/12/200212/31/2009


PAR to Revise IEEE Std C57.98-1994PAR extension requested and approved to 12/31/2009.

Molden(845) [email protected]

A.




Page 139 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee DISTRIBUTION TRANSFORMERSK. S.

(817) 215-4444

[email protected] Hanus

PC57.12.30

Standard for Pole-Mounted Equipment - Enclosure Integrity for Coastal Environments

03/22/200712/31/2011

New Project

New project: covers conformance tests and requirements for the enclosure integrity of pole-mounted equipment in coastal locations

Olen(262) [email protected]

O.

PC57.12.33

Guide for Distribution Transformer Loss Evaluation 06/25/199812/31/2004

PAR Withdrawn - Inactive WG

Decision made at Las Vegas Meeting to discontinue project. PAR administratively withdrawn by Nescom Dec '04

Pekarek(330) [email protected]

T. J.

C57.12.20

PC57.12.20

Standard for Overhead Type Distribution Transformers, 500 kVA and Smaller, High-Voltage 34 500 Volts and Below; Low-Voltage, 7970/13 800 Y Volts and Below

200512/31/2010

09/15/200612/31/2010


New PAR requested and approved to 12/31/2010.

Wilks(731) [email protected]

A. L.

C57.12.25

PC57.12.38

Standard for Pad-Mounted, Compartmental-Type, Self-Cooled, Single-Phase Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage, 34500 GrdY/19920 Volts and Below, Low Voltage, 240/120 Volts; 167 kVA and SmallerRequirements

12/31/200908/11/200512/31/2009

Approved - Active PAR for revision

Original PAR PC57.12.25 administratively withdrawn on 12/7/04 NesCom Meeting.New PAR PC57.12.38 approved 8/11/05.PAR modified in 2006, approved to 12/31/2009.1st ballot completed 9/28/2007

Ghafourian(731) [email protected]

A. A.

C57.12.28

PC57.12.28

Standard for Pad Mounted Equipment - Enclosure Integrity

200512/31/2010

Approved

Previously NEMA/ANSI C57.12.28-1999Published 9/30/2005


O.

C57.12.29

PC57.12.29

Standard for Pad Mounted Equipment - Enclosure Integrity for Coastal Environments

200512/31/2010

Approved

Previously NEMA/ANSI C57.12.29-1991Current standards Published 10/10/2005.


O.

C57.12.31

PC57.12.31

IEEE Standard for Pole Mounted Equipment - Enclosure Integrity

200212/31/2011

03/22/200712/31/2011


Published 3/6/2003.New PAR approved 3/22/2007


O.

C57.12.32 Standard for Submersible Equipment - Enclosure Integrity

200212/31/2013

Approved

Published 3/7/2003.Reaffirmation approved 03/28/08


O.




Page 140 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee DISTRIBUTION TRANSFORMERSK. S.

(817) 215-4444

[email protected] HanusC57.12.34

PC57.12.34

Requirements for Pad-Mounted, Compartmental-Type, Self-Cooled, Three-Phase DistributionTransformers, 2500 kVA and Smaller: High-Voltage, 34 500GrdY/19 920 Volts and Below; Low Voltage, 480 Volts and Below

12/31/200903/20/200512/31/2009


Originally Std. 1447, Combined C57.22-1980 & C57.12.26-1992Approved by RevCom 9/22/2004; published 3/8/05New PAR for revision approved 3/19/2005.

Shull(417) [email protected]

S.

C57.12.35 IEEE Standard for Bar Coding for Distribution Transformers

200712/31/2012

Approved

Formerly P1265.C57.12.35-1996 reaffirmation 6/23/2004.Approved by SA Board 9/27/2007

Matthews(601) [email protected]

P

C57.12.36

PC57.12.36

Standard Requirements for Liquid-Immersed Distribution Substation Transformers

200712/31/2012

Approved

PAR extended to 12/31/2008.Approved by SA Board on 9/27/2007

Rossetti(901) [email protected]

J. R.

C57.12.37 IEEE Standard for the Electronic Reporting of Transformer Test Data

200612/31/2011

Approved

Formerly C57.132, IEEE Std 1388-2000Approved on 3/30/2006. Published 7/21/2006

Hollingsworth(601) [email protected]

R.

C57.15

PC57.15

IEEE Standard Requirements, Terminology, and Test Code for Step-Voltage Regulators

199912/31/2009

06/09/200512/31/2009


A new PAR was approved 6/9/05 due to scope changes. Original PAR withdrawn.

Colopy(262) [email protected]

C. A.




Page 141 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee DRY TYPE TRANSFORMERSC. W.

(276) 688-1512

[email protected] Johnson, Jr.C57.12.01 IEEE Standard General Requirements for Dry-Type

Distribution and Power Transformers Including Those with Solid Cast and/or Resin Encapsulated Windings

200512/31/2010

Approved

Previous 1998 version was successfully revised and approved in 2005.Published 5/19/2006

Sullivan(813) [email protected]

J. C.

C57.12.51

PC57.12.51

Ventilated Dry-Type Power Transformers, 501 kVA and Large, Three-Phase, with High-Voltage 601 to 34500 Volts; Low-Voltage 208Y/120 to 4160 Volts - General Requirements

200812/31/2013

09/15/200612/31/2010

Approved

Previously NEMA document C57.12.51, original publication by NEMA in 1981, Reaffirmed in 1998. document transferred to IEEE in Dec 2002.New PAR approved in 20060. PAR modification approved 12-05-07. Revised Standard approved 9/27/08

Powell(202) [email protected]

P. A.

C57.12.52

PC57.12.52

Standard Requirements for Sealed Dry-Type Power Transformers, 501 kVA and Larger, Three-Phase, with High-Voltage 601 to 34 500 Volts, Low-Voltage 208Y/120 to 4160 Volts

1981 05/07/200712/31/2011

Active PAR for revision

Previously ANSI C57.12.52-1981NEW PAR approved for revision to Dec 2011

Kennedy(716) [email protected]

S. P.

C57.12.56

PC57.12.60

IEEE Standard Test Procedure for Thermal Evaluation of Insulation Systems for Ventilated Dry-Type Power and Distribution Transformers

198112/31/2007

12/10/200312/31/2009

Extended to Dec 2008

Revcom recommended ADMINISTRATIVE WITHDRAWAL12.56 AND 12.60 are being MERGED

Wicks(804) [email protected]

R. C.

C57.12.58 IEEE Guide for Conducting a Transient Voltage Analysis of a Dry-Type Transformer Coil

199112/31/2013

Approved - Active

Reaffirmation approved 9/27/2008

Kline(843) [email protected]

A. D.

C57.12.59 IEEE Guide for Dry-Type Transformer Through-Fault Current Duration

200112/31/2011

Approved

Reaffirmation approved in 12/5/2006.


P. A.

C57.12.60

PC57.12.60

IEEE Guide for Test Procedures for Thermal Evaluation of Insulation Systems for Solid Cast and Resin-Encapsulated Power and Distribution Transformers

199812/31/2007

12/10/200312/31/2008


PAR to Revise IEEE Std C57.12.56-1986 and IEEE Std C57.12.60-1998PAR extended to 12-31-09


R. C.

C57.12.91

PC57.12.91

IEEE Standard Test Code for Dry-Type Distribution and Power Transformers

200112/31/2010

12/05/200612/31/2010


New PAR for Revision approved 12/5/2006PAR for Amendment withdrawn

Foster(815) [email protected]

D. R.




Page 142 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee DRY TYPE TRANSFORMERSC. W.

(276) 688-1512

[email protected] Johnson, Jr.C57.124 IEEE Recommended Practice for the Detection of

Partial Discharge and the Measurement of Apparent Charge in Dry-Type Transformers

199112/31/2007

Approved

Need to initiate reaffirmation and request extension.Expiration extended by Revcom to 12-31-08Reaff Ballot Invitation opened 9/19/08

Johnson, Jr.(276) [email protected]

C. W.

C57.134 IEEE Guide for Determination of Hottest Spot Temperature in Dry Type Transformers

200012/31/2011

Approved



P. A.

C57.16

PC57.16

IEEE Standard Requirements, Terminology, and Test Code for Dry-Type Air- Core Series-Connected Reactors

199612/31/2010

11/02/200612/31/2010

Approved

PAR for revision approved 11/2/2006.

Dudley(416) [email protected]

R. F.

C57.94 IEEE Recommended Practice for Installation, Application, Operation, and Maintenance of Dry-Type General Purpose Distribution and Power Transformers

198212/31/2010

Approved


Lewis(910) [email protected]

T. D.

C57.96 IEEE Guide for Loading Dry Type Distribution and Power Transformers

199912/31/2009

Approved - Active

Reaffirmation approved 9/22/2004Previous revision in 1994.

Prevost(802) [email protected]

T. A.

IEEE 259 IEEE Standard Test Procedure for Evaluation of Systems of Insulation for Dry-Type Specialty and General-Purpose Transformers

199912/31/2009

Approved


Simpson, Jr.(603) [email protected]

R. W.

SubCommittee HV CONVERTER TR & REACTORSR. F.

(416) 298-8108

[email protected] DudleyC57.129

PC57.129

IEEE General Requirements and Test Code for Oil Immersed HVDC Converter Transformers

200712/31/2012

Approved

Trial use std published 6/6/2000; upgraded to full use 3/2002PAR for revision approved on 6/24/2004Approved 9/27/2007


R. F.

IEEE 1277

P1277

IEEE General Requirements and Test Code for Dry-Type and Oil-Immersed Smoothing Reactors for DC Power Transmission

200012/31/2005

11/10/200512/31/2009

Approved. Active PAR for revision

Active PAR for revision.


R. F.




Page 143 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee INSTRUMENT TRANSFORMERSJ. E.

(601) 346-9104

[email protected] SmithC57.13

PC57.13

IEEE Standard Requirements for Instrument Transformers

199312/31/2013

12/10/200312/31/2007

Approved

PAR to Revise IEEE Std C57.13-1993PAR extended to 12-31-08 Revision Ballot closed 10-23-07Revision Approved 3/28/08

Nelson(301) [email protected]

T. N

C57.13.2 Conformance Test Procedure for Instrument Transformers

200512/31/2010

Approved

C57.13.2-1991 revised to harmonize with C57.13-1993Approved by RevCom on 6/8/2005Published 9/29/2005.

Khalin(859) [email protected]

V. M.

C57.13.5

PC57.13.5

Standard of Performance and Test Requirements for Instrument Transformers of a Nominal System Voltage of 115 kV and Above

200612/31/2009

12/07/200512/31/2009


Reference Std. 1400Previously C57.13.5 was a trial useUpgraded to Full Use 3/30/2006

Riffon(514) 840-3000 [email protected]

P.

C57.13.6 Standard for High Accuracy Instrument Transformers12/31/2010

Approved

Document published in 12/9/2005

Ten Haagen(603) [email protected]

C. W.




Page 144 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee INSULATING FLUIDSR. K.

(617) 393-3133

[email protected] Ladroga

PC57.130

IEEE Trial-Use Guide for the Use of Dissolved Gas Analysis During Factory Temeprature Rise Tests for the Evaluation of Oil-Immersed Transformers and Reactors

01/30/200012/31/2009

New Project - under development

currently under ballot resolution.PAR extension requested and approved to 12/31/2007.PAR extension requested and approved to 12/31/2009.

Ladroga(617) [email protected]

R. K.

PC57.139

Guide for Dissolved Gas Analysis in Transformer Load Tap Changers

12/11/200212/31/2009

New Project - under development

Orig PAR to expire 12/31/2006. Deferred PAR withdrawal to 3/2007.PAR extended to 2009

Jakob(916) [email protected]

F.

C57.104

PC57.104

IEEE Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers

199112/31/2013

06/30/200612/31/2010

Approved

Original PAR and document withdrawn in Dec. 2005. New PAR approved in June 06. Ballot closed 10/10/07 Revision approved 09/27/08


R. K.

C57.106 IEEE Guide for Acceptance and Maintenance of Insulating Oil in Equipment

200612/31/2011

Approved

D6 pproved 12/6/2006Previously version in 2002, 1991 (R1998), 1977

Thompson(605) [email protected]

J. A.

C57.111 IEEE Guide for Acceptance of Silicone Insulating Fluid and Its Maintenance in Transformers

198312/31/2008

Approved

Standard EXPIRES Dec 31 2008


R. K.

C57.121 IEEE Guide for Acceptance and Maintenance of Less-Flammable Hydrocarbon Fluid in Transformers

199812/31/2007

Approved

Was to be administratively withdrawn in Dec., 2004Reaffirmation ballot pool invitation initiated in October, 2005.Exp. Date extended to 12/31/2007 Insulating Fluids Subcommittee decided on 10/17/2007 to withdraw this standard.However in 2008 Reaffirmation ballot in July; currently in Resolution

McShane(262) [email protected]

C. P.

C57.146 Guide for Interpretation of Gasses Generated in Silicone-Immersed Transformers

200512/31/2010

Approved

D3a - approved by RevCom on 9/21/05.Published 3/10/2006

Bartley(860) [email protected]

W. H.




Page 145 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee INSULATING FLUIDSR. K.

(617) 393-3133

[email protected] LadrogaC57.147

PC57.147

Guide for Acceptance and Maintenance of Natural Ester Fluids in Transformers 12/31/2013

12/10/200312/31/2007

Approved

1st Ballot closed - 98% approval rating.Approved by Early Consideration May 14, 2008

McShane(262) [email protected]

C. P.

IEEE 637 IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use

198512/31/2012

Approved - Reaffirmed

Reaffirmation approved by SA Board 9/27/2007

Verner202 [email protected]

J. A.




Page 146 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee INSULATION LIFED. W.

(610) 774-4686

[email protected] Platts

PC57.145

Guide for the Definition of Thermal Duplicate Liquid-Immersed Distribution, Power, and Regulating Transformers

0 06/25/199812/31/2004

PAR Withdrawn

Previously P1524 Modified PAR to expire in 2004PAR administratively withdrawn in December, 2004

Beaster(601) [email protected]

B. L.

C57.100

PC57.100

IEEE Standard Test Procedure for Thermal Evaluation of Liquid-Immersed Distribution and Power Transformers

199912/31/2008

12/08/200412/31/2008


Requested PAR for revision on 10/18/2004. PAR approved 12/8/2004


R. C.

C57.119 IEEE Recommended Practice for Performing Temperature Rise Tests on Oil Immersed Power Transformers at Loads Beyond Nameplate Ratings

200112/31/2013

Approved

Previously IEEE 838. Published 3/12/2002.Reaff approved 03/28/08

Tuli(262) 547-0123 [email protected]

S. C.

C57.91

PC57.91

IEEE Guide for Loading Mineral-Oil-Immersed Transformers

199512/31/2009

05/02/200512/31/2009


Combined C57.91-1981, C57.92-1981 & C57.115-1991Reaffirmation approved 6/23/2004New PAR for revision approved 5/2/2005.Revision to include Corr. 1

Raymond(518) [email protected]

T.

C57.91-1995/Cor IEEE Guide for Loading Mineral-Oil-Immersed Transformers--Corrigendum 1

200212/31/2007


In conjunction with C57.91 - reaffirmed in 6/2004. Currently under revision

Pierce(706) [email protected]

L. W.

IEEE 1276 IEEE Guide for the Application of High-Temperature Insulation Materials in Liquid-Immersed Power Transformers

199712/31/2011

Approved

Upgrade from trial use to full use on 3/30/2000Reaffirmation approved by SA Board in 3/30/2006

Franchek(802) [email protected]

M. A.

IEEE 1538 IEEE Guide for Determination of Maximum Winding Temperature Rise in Liquid Filled Transformer

200012/31/2010

Approved

Original approval in 2000. Reaffirmed in 2005.

Platts(610) [email protected]

D. W.




Page 147 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee PERFORMANCE CHARACTERISTICSR. S.

(314) 679-4803

[email protected] Girgis

PC57.133

Guide for Short-Circuit Testing of Distribution and Power Transformers

03/04/200512/31/2009

Active PAR for revision of SC Test Guide

New PAR for revision approved on 2/22/05.

[email protected]

M.

PC57.142

A Guide To Describe The Occurrence And Mitigation Of Switching Transients Induced By Transformer-Breaker Interaction

05/07/200712/31/2011


PAR extension granted 9/23/2004 - new expiration @2006Balloted in 2005 -many negativesNew PAR approved 2007- for join sponsorship between Transformers Committee and Switchgear Committee.

Degeneff(518) [email protected]

R. C.

PC57.149

Guide for the Application and Interpretation of Frequency Response Analysis for Oil Immersed Transformers

06/24/200412/31/2010

New Project - Active PAR

PAR approved by NesCom 6/23/2004PAR Extension Request Approved Sept 08 to 12/31/2010

Sweetser(617) [email protected]

C.L.

PC57.153

Transformer Paralleling Guide 03/27/200812/31/2012

New Project - Active PAR

PAR approved 3/27/08

Jauch(727) [email protected]

E.T.

C57.105 IEEE Guide for Application of Transformer Connections in Three-Phase Distribution Systems

197812/31/2013

Approved

Was to be administratively withdrawn in Dec., 2004. Reaffirmation ballot in Februay 2008.Reaffirmation approved 03/28/08

Reitter(650) [email protected]

G. J.

C57.109 IEEE Guide for Liquid-Immersed Transformers Through-Fault-Current Duration

199312/31/2013

Approved

Reaffirmation ballot invitation opened Oct 2005.Extension approved to 12/31/2007Reaff Recirc ballot closed 2/23/08. Reaff approved 03/28/08

Patel(205) [email protected]

B. K.

C57.110

PC57.110

IEEE Recommended Practice for Establishing Transformer Capability When Supplying Nonsinusoidal Load Currents

199812/31/2013

11/18/200412/31/2008

Approved

PAR approved 11/18/2004. Balloted Sept 2007Recirc ballot closed 11-15-07 Revision approved 03/28/08 Revision published 8/15/08

Marek(804) [email protected]

R. P.




Page 148 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee PERFORMANCE CHARACTERISTICSR. S.

(314) 679-4803

[email protected] GirgisC57.123

PC57.123

IEEE Guide for Transformer Loss Measurement 200212/31/2011

02/20/200712/31/2011

Approved - Active New PAR for revision

Ref Std. IEEE 1098WG Chair record from IEEE shows R. GirgisRevision ballot pool formed. New Draft4 in ballot.Hold up due to Dual Logo process

TeNyenhuis(519) [email protected]

E.G.

C57.18.10

C57.18.10a

IEEE Standard Practices and Requirements for Semiconductor Power Rectifier Transformers

199812/31/2008

03/04/200512/31/2009

Approved

Replaced C57.18-1964 pool cathode mercury-arc rectifiers.New PAR for Amendment approved 2/22/05Amendment approved March 28/08Reaffirmation Ballot Invitation opened 09/12/08

Kennedy(716) [email protected]

S. P.

C57.21

PC57.21

IEEE Standard Requirements, Terminology, and Test Code for Shunt Reactors Rated Over 500 kVA

199012/31/2013

09/11/200312/31/2007

Approved

Reaffirmation approved on 6/23/2004.Balloted in 2007Recirc ballot closed 1/6/2008 Approved 03/21/08


R. F.

IEEE 32

PC57.32

IEEE Standard Requirements, Terminology, and Testing Procedures for Neutral Grounding Devices

197212/31/2009

12/11/200212/31/2009


Dec. 2002 - Sponsor changed from PES/SPD to PES/TRPAR to revise PC57.32 approved 2002 to expire on 12/31/2006.PAR - expiration date extended to 12/31/2009

Schappell(919) [email protected]

S. M.




Page 149 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee POWER TRANSFORMERST.

(602) 236-8617

[email protected] Lundquist

PC57.12.10

Standard Requirements for Liquid-Immersed Power Transformers

1997 06/13/200212/31/2008

New Project - Std under development

Formerly NEMA/ANSI document.PAR extension request granted by NesCom to 12/31/2008.

Arteaga(601)[email protected]

J.

PC57.143

Guide for Application for Monitoring Equipment to Liquid-Immersed Transformers and Components

03/21/200212/31/2010

New Project - Active PAR Std under developemnt

PAR extension requested approved on 12/5/2006.

Chu(212) [email protected]

D.

PC57.148

Standard for Control Cabinets for Power Transformers 02/27/200412/31/2008


PAR Extension Request granted in Sept 08, until 12/31/2010

Watson(561) [email protected]

J.D.

PC57.150

Guide for the Transportation of Large Power Transformers and Reactors

11/18/200412/31/2008

New Project - PAR approved in Nov. 2004

PAR approved by NesCom in 11/18/2004NEEDS PAR EXTENSION

Anderson(402) [email protected]

G. W.

PC57.17

Standard Requirements for Arc Furnace Transformers 03/22/200712/31/2011

NEW PAR for revision

PAR for revision of old ANSI Std apporved Mar 22/08.

Corsi(330) [email protected]

D.

C57.116 IEEE Guide for Transformers Directly Connected to Generators

198912/31/2010

Approved

Reaffirmation approved in Dec. 2005


T.

C57.117 IEEE Guide for Reporting Failure Data for Power Transformers and Shunt Reactors on Electric Utility Power Systems

198612/31/2006

Approved

Previously IEEE 786-1986, original approval date 6/19/1986Reaffirmation ballot pool formed. Need WG Chair

Binder, Jr.(724) [email protected]

W. B.

C57.120 IEEE Loss Evaluation Guide for Power Transformers and Reactors

199112/31/2011

Approved

Ref Std. 842Reaffirmation approved by RevCom 6/8/2006.

Lau(604) [email protected]

M. Y.

C57.125 IEEE Guide for Failure Investigation, Documentation, and Analysis for Power Transformers and Shunt Reactors

199112/31/2010

Approved

Std reaffirmed 5/10/2005

Binder, Jr.(724) [email protected]

W. B.




Page 150 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee POWER TRANSFORMERST.

(602) 236-8617

[email protected] LundquistC57.131

PC57.131

IEEE Standard Requirements for Load Tap Changers 199512/31/2007

05/15/200312/31/2009


PAR to Revise IEEE Std C57.131-1995PAR extension approved in 2007 until 12/31/2009

Henning(262) [email protected]

W. R.

C57.135

PC57.135

IEEE Guide for the Application, Specification and Testing of Phase- Shifting Transformers

200112/31/2011

02/20/200712/31/2011


Approved for IEEE/IEC Dual Logo Dec. 2005 - IEC 62032 Ed. 1

Sim(919) [email protected]

H. J.

C57.140 Evaluation and Reconditioning of Liquid Immersed Power Transformers

200612/31/2010

Approved

Approved by RevCom 11/16/2006

James(504) [email protected]

R.I.

C57.93

PC57.93

IEEE Guide for Installation of Liquid-Immersed Power Transformers

200812/31/2013

Approved

Rev of ASA C57.93-1958, IEEE Std C57.12.11-1980, & C57.12.12-1980Previous version IEEE Std C57.93-1995, reaffirmed in 2001.RevCom approved on 12/4/07 - published 3/31/08

Lau(604) [email protected]

M. Y.

IEEE 638

P638

IEEE Standard for Qualification of Class 1E Transformers for Nuclear Power Generating Stations

199212/31/2011

06/07/200712/31/2011

Approved - Active - with errata dated 4/7/1999

Reaffirmation approved by SA Board 3/30/2006.New PAR for revision approved 6/7/2007.

Swinderman(724) [email protected]

C.




Page 151 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee STANDARDSW. H.

(860) 722-5483

[email protected] BartleyC57.12.00

PC57.12.00

IEEE Standard General Requirements For Liquid-Immersed Distribution, Power, and Regulating Transformers

200612/31/2011

06/07/200712/31/2011

Approved - New PAR Active

Previous revision approved September, 2006.Published 2/28/2007. New PAR approved on 6/7/2007 for 2008 revision; ballot pool formed; Ballot opened Sept 30, 2008

Kim(626) [email protected]

D.

C57.12.70

PC57.12.70

IEEE Standard Terminal Markings and Connections for Distribution and Power Transformers

200012/31/2011

05/07/200712/31/2011


Reaffirmation approved by RevCom 3/30/2006.Published 3/16/2001.New PAR for revision approved by SA Board 5/7/2007

Shull(417) [email protected]

S.

C57.12.80

PC57.12.80

IEEE Standard Terminology for Power and Distribution Transformers

200212/31/2007

11/10/200512/31/2009

Approved - Active PAR

Amendment PAR approved to add thermally upgraded definitionPAR for Amendment withdrawn June 2008 PAR for Revision approved (June 2008) until December 2012


T.

C57.12.90

PC57.12.90

IEEE Standard Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

200612/31/2011

05/07/200712/31/2011

Approved - New PAR active for next revision

Previous revision approved 9/15/2006Published 2/15/2007New PAR active for 2008 revision; ballot pool formed. Ballot opened 9/30/08

Antosz(412) [email protected]

S.

C57.144 Guide for Metric Conversion of Transformer Standards 200412/31/2009

Approved

Published 10/22/2004

Olson(204) [email protected]

T.

IEEE 62

PC57.152

IEEE Guide for Diagnostic Field Testing of Power Apparatus - Part 1: Oil Filled Power Transformers, Regulators, and Reactors

199512/31/2010

05/19/200812/31/2012

Approved

Reaffirmation was approved on 3/19/05.New WG formed to revise document on a continuous basis New PAR number assigned: PC57.152PAR approved 5/19/08

Verner202 [email protected]

J. A.




Page 152 of 155

STANDARD

PROJECTTITLE


PAR Issue Date

PAR Expiration



EmailPhone

SubCommittee UNDERGROUND TR & NW PROTECTC. G.

(847) 683-2145

[email protected] NiemannC57.12.23

PC57.12.23

IEEE Standard for Underground Type, Self-Cooled, Single-Phase Distribution Transformers with Separable Insulated High-Voltage Connectors; High Voltage 25kV and Below; Low Voltage 600V and Below

200212/31/2009

03/04/200512/31/2009


Published 8/8/06.Modified PAR approved (June '08) until December 2009

Traut(859) [email protected]

A.

C57.12.24

PC57.12.24

Requirements for Transformers - Underground-Type, Three Phase Distribution Transformers: High Voltage (34 500 GrdY/19 920 V and Below) and Low Voltage (480V and Below, 2500 kVA and Smaller

200012/31/2011

02/20/200712/31/2011

Standard withdrawn in 2001

Existing standard withdrawn by IEEE on 1/15/2001. No longer endorsed by IEEE. New working group formed to address revision. PAR approved Feb 27 2007. Ballot launched Sept 9, 2008

Termini(610) [email protected]

G.

C57.12.40

PC57.12.40

Standard for Requirements for Secondary Network Transformers - Subway and Vault Types (Liquid Immersed)

200612/31/2011

03/27/200712/31/2011

Approved - New PAR for Revision Active

D4 approved by RevCom 3/30/3006.Standard Published 9/15/2006.New PAR approved 3/27/2007

Klaponski(204) [email protected]

B.

C57.12.44

PC57.12.44

IEEE Standard Requirements for Secondary Network Protectors

200512/31/2010

Approved

PC57.12.44/D2.1 approved by RevCom in December 2005. Published 6/07/2006Previous revision in 2000.

Mulkey(415) [email protected]

D. H.

C57.12.57

NONE

Requirements for Ventilated Dry-Type Network Transformers 2500 kVA and Below, Three-Phase with High Voltage 34 500 Voltas and Below, Low Voltage 216Y/125 and 480Y/125 Volts

199212/31/2000

Standard withdrawn in 2001

Existing standard withdrawn by IEEE on 1/15/2001. No longer endorsed by IEEE. New working group formed to address revision. Need new PAR.

Robinson(361) [email protected]

A. L.




Page 153 of 155

IEEE/PES Transformers Committee - Activity Organization ChartChair: Tom Prevost

Vice Chair: J. Ed Smith Secretary: Bill Chiu Std. Coordinator: Bill Bartley

INSTRUMENTJames E. Smith

HVDC Converter Xfmrs & Smoothing Reactors

Richard Dudley

DRY TYPEChuck W. Johnson

DISTRIBUTION Ken Hanus

BUSHINGFred E. Elliott

POWERTom Lundquist

UG & NW ProtectorC. G. Niemann

Gen. Req. of BushingsRev of C57.19.00

Bushing App. GuideC57.19.100

OH Dist. Xfmrs C57.12.20

Wilks/Cooper

Eqp Encl. Integrity - PadC57.12.28

Elec Rpt of Test DataIEEE 1388/C57.12.37

General Req.C57.12.01

Req. & Test Code for HVDC Con. Xfmr

C57.129

Req. & Test Code for HVDC Smoothing

ReactorsIEEE 1277

Step Volt. RegulatorC57.15

Thermal Eval.PC57.12.60

Req for Inst. XfmrsC57.13

Test Proc. For Inst. Xfmrs

C57.13.2

Test Req. for >= 115kVPC57.13.5

Req. for Elect. Rev. MeteringC57.13.6

Guide for MonitoringC57.143

Directly Connected GSU

C57.116 Reaffirmation

Req. for Liq. Imm. Power Xfmrs

C57.12.10

Std. Req. for Sec. Network Xfmrs

C57.12.40

UG 3ph Dist Xfmr< 2500KVAC57.12.24

Dry Type Air-Core ReactorsC57.16

Performance Characteristics

C57.19.01

Req. & Testing of DC BushingsC57.19.03

Req.for Vent. <=500KVAC57.12.50

Req.for Vent. >500KVAPC57.12.51

Req. for Sealed >500kVA

PC57.12.52

Thermal Eval. for Vented Dry-Type

InsulationC57.12.56

Transient AnalysisC57.12.58

Dry-Type Through Fault Current Duration

C57.12.59

Thermal Eval. For Solid-Cast& Resin Encap

InsulationC57.12.60

Test CodeC57.12.91

IEEE 683 - Class IEReaffirmation

Phase-Shift XfmrsC57.135

Eval & ReconditioningC57.140

Std for Control CabinetC57.148

Arc Furnace XfmrC57.17

Installation & Maint GuideC57.93

Vent Dry-Type Network Xfmrs <=2500KVA

C57.12.57

Encl Integrity - Pad Costal Env.C57.12.29

Encl Integrity - Pole Mtd.C57.12.31

Req. for 3ph Pad MountC57.12.34

UG Self-Cool 1-phC57.12.23

Pad-Mount 1ph Self-Cool <=2500kVA

C57.12.25 /PC57.12.38

Encl Integrity - Subm.C57.12.32

Bar CodingC57.12.35

Task Force - Draw-Leads

R. Nordmann

Transport GuidePC57.150

TF on Tank Rup. & MitigationP. Zhao

Revised by W. Bartley 10/1/08

Std. Req. for Sec. Network Protectors

C57.12.44

Req. for LTCC57.31

Dry-Type Hottest SpotC57.134

Dry Type Op & Maint. GuideC57.94

Dist. Sub. XfmrsC57.12.36

Guide for ParallelingC57.153

Page 24 of 25



Page 154 of 155

IEEE/PES Transformers Committee - Activity Organization ChartChair: Tom Prevost

Vice Chair: J. Ed Smith Secretary: Bill Chiu Std. Coordinator: Bill Bartley

Insulating Fluids Rick Ladroga

Insulation LifeDon Platts

Audible Sound & Vibration

Jeewan Puri

DIELECTRIC TESTLoren B. Wagenaar

Performance CharacteristicRamsis Girgis

StandardsWm. Bartley

Req. & Test Code for Shunt Reactors

>500kVA C57.21

Semicon Rectifier XfmrsC57.18.10

S. Kennedy

App. Guide for Xfmr Connections

C57.105 - Reaffirmation

Sound Level AbatementC57.136

Rev. to Impulse Test Guide

C57.98 & C57.138

Rev of Low Freq. TestsB. Poulin

Detection of PD -Acoustic Emission

C57.127

DGA GuideC57.104

Mineral OilC57.106

Silicone OilC57.111

DGA During Thermal Test

C57.130

Less Fammmable Hydro-Carbon Fluid

C57.121

Loading GuideC57.91

T. Raymond

TF Investigate Use of Furan Testing K. Haggerty

Max. Wdg Temp RiseIEEE 1538

Temp Rise Test Above NP RatingC57.119

Test Procedure Thermal Eval

C57.100R. Wickes

Cont Rev of C57.12.00D. Kim

Cont. Rev of C57.12.90S. Antosz

Metric Conversion of Xfmr StdsC57.144

TerminologyC57.12.80

B. Chiu

MeetingsGreg Anderson

Through-Fault Current Duration C57.109

Reaffirmation

Non-Sinusoidal Load CurrentC57.110

Xfmr Loss Measurement

C57.123

Short Circuit TestingPC57.133

Mitigation of Switching Transients CB/Xfmr

InteractionPC57.142

App. Of High Temp InsulationIEEE 1276

DGA in LTCC57.139

Natural Ester FluidC57.147

Reclamation of Insulating Oil

IEEE 637

DGA in SiliconeIEEE 1258/PC57.146

Website DevelopmentS. McNelly

Terminal Markings & Connections

S. Schull C57.12.70

Diagnostic Field Testing J. Verner

IEEE C57.152 //(62)Neutral Grounding Devices

IEEE32/PC57.32

Educational DevelopmentK. Haggerty

WG on DielectricTest Table

P. Hopkinson

Guide for Sound Level Measurement

PC57.151

TF for Ballot Comment Resolution

TF - Temp Rise Test -C57.12.90, Clause 11

P. Powell

TF - IEEE-IEC Cross Reference

J. Sim

Revised by W. Bartley 9/19/08

TF on Determination ofMoisture in Paper

J. SimFRA GuidePC57.149

PCS Rev to Test Code- 12.90

PCS Rev. to Gen Req - 12.00

S. Snyder

TF on PD MeasurementC57.113

Rev of Transient Voltage Test

P. Riffon/P. Heinzig

TF- External Dielectric Test Clearance

Eric Davis

TF- Special DielectricTest IssuesB. Forsyth

Page 25 of 25



Page 155 of 155

Documents

IEEE/PES Transformers Committeegrouper.ieee.org/groups/transformers/meetings/f... · IEEE/PES Transformers Committee Meeting Fall, 2008 Porto, Portugal October 5 - 9, 2008 Committee