SPECIFICATION FOR DISTRIBUTION NETWORK POWER TRANSFORMERS (with expansion tank)

Israel Electric Corporation Ltd. Marketing Division

National Network Unit

Edition No.: 5 Issued date: June 2011 Page No. 1 of 91

Specification NTS-103 For

Distribution Network Power Transformers (with expansion tank)

SPECIFICATION

FOR

DISTRIBUTION NETWORK POWER TRANSFORMERS (with expansion tank)






SPECIFICATION

FOR

DISTRIBUTION NETWORK POWER TRANSFORMERS (with expansion tank)

Written by: B. Vainshtein Checked by: Y. Shachak Approved by: N. Liberman Z. Segev






Table of Contents:

Clause no. Clause description Page No.

1. General 5 2. Standards 5 3. Documents Required For The Proposal 5 4. Data and Technical Requirements 7 5. Criteria for final comparison of Bidders offers 33 6. Prototype 33 7. Tests 35 8. Quality Requirements 38 9. Summary of data 39 10. Conformity with proposal documents 45

Appendix "A" Manufacturer Experience to the Purchaser’s satisfaction 46 Appendix "B" Type and special tests declaration 48 Appendix "C" Declaration regarding the guaranteed losses of the proposed

transformers 50

Appendix "D" Know – How agreement to the Purchaser’s satisfaction 52 Appendix "E" Specification no.50 dated 1/7/09 for mineral insulating oil supplied

with/within new electrical equipment 54

Appendix "F" Declaration regarding fulfillment of requirements of SI 5484 Israeli Standard

62

Appendix "G" Required schedule for prototype approval of distribution network power transformers

64

Appendix "H" Quality Requirements (Specification Q – APP – 02, Rev.4) 66 Appendix "I" Routine tests results on magnetic media in diskette form 75 Appendix "J" Criteria for final comparison of bidders offers 81 Appendix "K" Specification no. 801 – non-indicating silica gel for use as desiccant

in transformer air dehydrators 83

Appendix"M" Summary Of Prices 89






SPECIFIC PROPOSAL SUBMISSION INSTRUCTIONS

Bidders shall submit their technical offers in the following way:

1. Contents of the offer shall be given at the beginning of the offer

2. Each chapter shall be separated from the others by divider page

3. Each proposed type of transformer shall be presented in a separate chapter including:

the questionnaire (Summary of Data) filled in and signed, drawings, routine, type and

special tests reports, etc…

4. A separate chapter shall be dedicated for the insulating oil data including questionnaire

(Appendix “E”) filled in and signed

5. A separate chapter shall be dedicated for the Quality assurance and for the Quality

control including: quality manual, ISO 9001 certificates, quality plan and preliminary

inspection and test plan

6. A separate chapter shall be dedicated for the silica gel data including questionnaire

(Appendix “K”) filled in and signed

7. A separate chapter shall be dedicated for the painting data

8. A separate chapter shall be dedicated for the signed declarations

9. A separate chapter shall be dedicated for the know-how agreement






1. GENERAL

1.1. SCOPE OF SUPPLY Design, manufacture, furnish and deliver fully tested, three-phase, oil-immersed, core type, distribution network power transformers with natural (self) cooling and with expansion tank. (Breathing type). The transformers may be installed either indoors or outdoors.

2. STANDARDS

2.1. Unless otherwise stated, hermetically sealed distribution network power transformers shall

be designed, manufactured and tested in accordance with the latest published recommendations of the International Standard IEC 60076.

2.2. Standards referred to in this Specification and in Supplements to this Specification are

integral parts of this specification unless explicitly stated otherwise.

2.3. The equipment, including all appurtenances and accessories, shall be fabricated, inspected, tested and preserved in compliance with the Standards as specified herein, unless otherwise indicated.

2.4. In the event that no reference to Standard is made herein, all components and parts shall be fabricated, inspected, tested and preserved, so as to ensure their fitness for designed use and purpose.

2.5. The transformers shall fulfill the requirements of SI 5484 Israeli Standard. (Distribution transformers - Requirements for energy efficiency and labeling. In case, during the tender or during contract period the SI 5484 Israeli Standard will be changed, the Bidder or the Contractor will be required to propose their offer or to supply transformers, as applicable, which will meet the requirements of the latest published Israeli Standard regarding energy efficiency and marking.

2.6. If this Specification contains requirements which differ from those of the above mentioned Standards except the SI 5484 Israeli Standard or the latest published Israeli Standard regarding energy efficiency and marking, the requirements of this Specification shall take precedence.

3. DOCUMENTS REQUIRED FOR THE PROPOSAL

The Bidder shall submit together with his offer the following documents: 3.1. Completed filled-in questionnaire signed by the Bidder (Manufacturer)

(Summary of data) for the proposed transformers.






3.2. Quality Assurance Manual including Quality Procedures of the factory where transformers are manufactured/assembled and tested.

3.3. Manufacturer Experience data to the Purchaser’s satisfaction as required in Appendix "A"

3.4. Type and special test reports, according to paragraph 7.2 for identical or similar transformers to those proposed in the Bid, including test circuit, instruments used, test sequence and description of method.

3.5. Filled-in and signed type and special tests declaration – Appendix "B". The Bidder shall guarantee to perform (in case of award), at his own expense, type and special tests as required in paragraph 7 and submit to the Purchaser the reports, in English, of these type and special tests before shipment of the ordered transformers.

3.6. Routine tests for identical or similar transformers to those proposed in the Bid, including test circuit, instruments used, test sequence and description of method.

3.7. Filled-in and signed guaranteed losses declaration – Appendix "C".

3.8. General outline drawing with dimensions, materials, coating, weight, etc.

3.9. Installation instructions.

3.10. Maintenance instructions (including frequency, procedure and materials required).

3.11. Manufacturer's requirements for prolonged storage (2-3 years) before installation, taking into account the specific conditions under clause 4.2.

3.12. List of components to be manufactured locally (in Israel) (in case of local production).

3.13. Preliminary inspection and test plan to be performed by the manufacturer.

3.14. ISO 9001 certificate from an Accredited Recognized Certification Body (CB) that is a part of or belongs to an International Certification Network of CB's.

3.15. Know – How agreement to the Purchaser’s satisfaction (in case of Know How transfer). The agreement shall meet the requirements as specified in Appendix "D".

3.16. Required schedule for prototype approval of Distribution Network Power Transformers - Appendix “G”.

3.17. Declaration regarding fulfillment of requirements of SI 5484 Israeli Standard – Appendix "F"






3.18. Spare parts data which shall include the following information: Manufacturer name of spare part, Manufacturer number of spare part, order number of spare part (if any), description of spare part, and reference number in drawing.

3.19. Technical data of high voltage windings as required in clause 4.16 of this Specification.

3.20. Remarks: 3.20.1. All descriptive material shall be in English or Hebrew.

3.20.2. The Israel Electric Corporation (I.E.C.) reserves the right, at its discretion, to allow

a Bidder to complete such proposal and to submit such documents at a later date, as prescribed by I.E.C

3.20.3. Only after written approval by the Purchaser, of all the data and the sample submitted with the offer, the offer may be deemed to be technically and acceptable and the Bidder may be invited to submit his price Bid.

4. DATA AND TECHNICAL REQUIREMENTS

4.1. Operating Conditions 4.1.1. The rated voltages of the distribution systems are 12.6 kV, 22 kV and 33 kV.

4.1.2. The maximum operating voltages of the above mentioned distribution systems

are 13.8 kV, 24 kV and 36 kV.

4.1.3. The system rated frequency is 50 Hertz.

4.1.4. The system type is: 3 phase, 3 wire. The neutral point of the secondary winding of the transformer feeding the distribution system to which the proposed transformers shall be connected is grounded as follows: - for 12.6 kV system, solidly grounded or grounded via a resistor with a factor of earthing of 106% - for 22 kV system, resonant grounded via Peterson Coil and might be occasionally solidly grounded for short periods of time, or solidly grounded or grounded via a grounding transformer - for 33 kV system, solidly grounded or resonant grounded via Peterson coil being






occasionally solidly grounded for short periods of time It is to be noted that all the distribution systems are operated radially. Ground fault conditions when the system is resonant grounded may sustain for several hours.

4.1.5. The maximum three phase symmetrical short-circuit value at substation feeding points of: - 12.6 kV system is 350 MVA. - 22 kV system is 500 MVA. - 33 kV system is 500 MVA

4.2. Service Conditions

The service conditions shall be according to clause 4 of IEC Standard 60076-1 and clause 4.3 of IEC Standard 60076-2/1993, with the following additions and modifications: - Severe atmospheric and industrial air pollution, coal dust, salt spray; - Long dry period without any rainfall; - High atmospheric humidity as experienced in coastal areas; - Direct and continuous brilliant solar radiation for long periods; - Annual mean air temperature : +25°C; - maximum relative humidity : 95%; - average relative humidity : 70%; - Annual variation in air temperature from -10°C to +50°C; - Average ambient temperature measured over a period of 24 hours does not exceed 35°C.

4.3. The rated power shall be one of the following: 50, 100, 160, 250, 400 or 630 kVA

4.4. The rated line to line primary voltage shall be one of the following: 12.6, 22 or 33 kV. 4.5. The rated line to line and line to neutral secondary voltage shall be at no-load 400 and 231

volts accordingly.

4.6. The number of phases shall be 3.

4.7. The rated frequency shall be 50 Hertz

4.8. The vector group of connections shall be Dyn11.

4.9. The short-circuit impedance at full load shall be: (4.4 ± 0.4)%






4.10. Power Losses and No-Load Current The maximum guaranteed values of the no-load losses, load losses and no-load current shall not exceed the values given in the following table:

Rated Primary Line to Line Voltage, Un

(kV)

Rated Power

Sn (kVA)

No-load Losses

Po (W)

Load Losses PL (75oC)

(W)

No-Load Current

Io (%)

12.6 630 730 5200 2.0 50 110 875 2.8 100 180 1475 2.6 160 260 2000 2.4 250 360 2750 2.3 400 520 3850 2.1

22

630 730 5200 2.0 50 190 1250 2.0 100 230 1620 2.6 250 450 3250 2.3 400 650 4600 2.1

33

630 950 5500 2.0 4.11. Power Losses Costs and Liquidated Damages

4.11.1. The following words or combinations of words shall have the meaning

appearing next to them: (a) Guaranteed losses - no load losses and load losses (at 75°C) for each proposed transformer type (defined by voltage and power), as declared by the Bidder, at the commercial stage of the tender. (b) Actual losses - no load losses and load losses (at 75°C) measured in each transformer actually supplied to the I.E.C. (c) The original contract period – the period of the contract, entered into between the I.E.C and the contractor, not including any extensions thereof and not including the option period. (d) The option period – the period within which the I.E.C purchases any transformers from the contractor pursuant to and following the exercise of the option, granted to it under the contract. (e) The extension of the original contract period - the period by which the original contract period is extended either pursuant to the I.E.C’s right under the contract, or pursuant to the parties’s mutual consent, as applicable. (f) The extension of the option period - the period by which the option period is extended either pursuant to the I.E.C’s right






under the contract, or pursuant to the parties’s mutual consent, as applicable. (g) Group of transformers - all the transformers of the same type (defined by voltage and power), actually supplied to the I.E.C by the contractor. (h) Draw order - any order issued by the I.E.C for the supply of the transformers pursuant to the contract. (i) Contract - the frame contract or frame order, signed or entered into between the I.E.C and the contractor, at the conclusion of the tender. (j) Second best Bidder - the Bidder, whose price proposal in the tender is second best to that of the contractor (after weighting all relevant techno-economical factors, including preference for locally manufactured goods), as per the I.E.C’s applicable guidelines for techno-economical evaluations of bid proposals.

4.11.2. Bidders are required to submit their guaranteed no-load and load losses (at 75°C) for each proposed transformer type (defined by voltage and power) at the commercial stage of the tender.

4.11.3. In comparing Bidder's proposals, the guaranteed losses will be taken into consideration. The financial value attributable to guaranteed power losses will be evaluated as follows: - US$ 7950 per Kilowatt for no-load losses. - US$ 810 per Kilowatt for load losses.

4.11.4. If it turns out that the actual losses exceed the guaranteed losses, the

contractor shall pay to the I.E.C liquidated damages in accordance with the terms and conditions, set forth in the following paragraphs.

4.11.5. If the sum of the actual no-load and load losses of any group of transformers (as defined above) supplied in the original contract period, exceeds the sum of the losses guaranteed by the Contractor by more than 5%, the Contractor will pay liquidated damages according to the rates stipulated in paragraph 4.11.3 above. The above liquidated damages will be paid by the Contractor as to each transformer where the sum of actual losses exceeds the sum of guaranteed losses by more than 5%. In respect of those transformers where the sum of the actual losses is equal or lower than 1.05 times the sum of guaranteed losses, no liquidated damages will be imposed.






The liquidated damages, payable by the Contractor will be calculated according to the following formula (as to for each relevant transformer separately):

C=CO(∆POM-1.05∆POG)+CL(∆PLM-1.05∆PLG) where: - C, value of liquidated damages (in US$) - CO, cost of no-load losses (in US$ per Kilowatt). The value of CO shall

be taken according to above paragraph 4.11.3, only if (∆POM-1.05∆POG)>0, otherwise CO = 0.

- CL, cost of load losses (in US$ per Kilowatt). The value of CL shall be taken according to above paragraph 4.11.3, only if (∆PLM-1.05∆PLG)>0, otherwise CL = 0.

- ∆POM, actual no-load losses (in Kilowatts) - ∆POG, guaranteed no-load losses (in Kilowatts) - ∆PLM, actual load losses (in Kilowatts) - ∆PLG, guaranteed load losses (in Kilowatts)

4.11.6. At the conclusion of the original contract period, the I.E.C shall re-evaluate the actual cost to it of each group of the transformers, supplied by the Contractor during said period. In re-evaluating such cost, the I.E.C shall substitute the guaranteed losses of such group by the actual losses. The result of such re-evaluation shall then be compared to the cost of said group of transformers pursuant to the offer of the second best Bidder, based, among others, on the tender price and guaranteed losses, declared by said Bidder. If it turns out, based on such comparison, that the Contractor would not have won the award for said group of transformers, had he declared the actual losses (rather than the guaranteed losses), then the Contractor shall pay to the I.E.C additional liquidated damages, equal to the difference, if any, between the total cost to the I.E.C of the relevant group of transformers under the Contractor ’s offer (calculated on the basis of the actual losses) and the total cost of the same group of transformers under the offer of the second best Bidder, plus ten (10%) percent of the total contract price of such group of transformers, adjusted to the date of the re-evaluation. It is clarified, that the liquidated damages, payable under this paragraph shall be in addition to the liquidated damages, if any, payable under the provision of the previous paragraphs, above.

4.11.7. The provision of the previous paragraphs 4.11.5 and 4.11.6 shall also apply as to each group of transformers, supplied during the option period, the extension of the original contract period and the extension of the option period (as such combination words are defined above), if applicable, subject






only to the following modification: anywhere, in the previous paragraph, where the words “original contract period” appear, they shall be substituted by words “option period”, or “the extension of the original contract period”, or “the extension of the option period”, as applicable.

4.11.8. If the actual losses of any transformer exceed the guaranteed losses plus tolerances (the tolerances are specified in Standard IEC 60076) or exceed the losses given in Table 1 and Table 2 of Standard SI 5484, the transformer will be rejected and the contractor shall be charged with any applicable liquidated damages for the delay, if any, in the delivery of such transformer. In the event that the quantity of rejected transformers in any given period of six months (beginning on the date of the first supply pursuant to the first draw order and every period of six months thereafter) exceed four (4%) percent of the total number of transformers, supplied during such period, the contractor shall be in a substantial breach of contract, entitling the I.E.C to pursue any legal remedy, available, under the law, for such a breach.

4.12. Temperature Rise

The temperature rise of the top layer of the oil shall not exceed 60 degrees Celsius. The temperature rise of the windings (measured from the resistance change) shall not exceed 65 degrees Celsius.

4.13. Insulation Levels The requirements concerning insulation are summarized in the following table:

Rated Line to Line Voltage, Un

(kV)

System Highest Line to Line Voltage, Um

(kV)

Basic Insulation Level

BIL (1.2/50µs) (kV peak)

One Minute Withstand Voltage (r.m.s.)

at frequency of 50Hz (kV r.m.s.)

12.6 22 33

13.8 24 36

95 125 170

38 50 70

0.4 - - 3

4.14. Noise Level The maximum noise level (A-weighted surface sound pressure level) shall not exceed the values given in the following table and measured at a distance of one meter from the transformer. The noise level test shall be performed according to Standard IEC 60076-10 using noise level meter periodically calibrated according to IEC 61672-3. Additionally the technical specification of the noise level meter shall state that noise level meter meets the






requirements of the IEC 61672. All relevant documents shall be presented to the I.E.C before performing noise level tests.

Rated Power, Sn

(kVA)

A-Weighted Surface Sound Pressure Level

LpA (dB(A), 1m)

50

100

160

250

400

630

45

46

47

48

50

52

4.15. Dimensions The maximum dimensions of the transformers shall not exceed the values given in the following table:

Rated Power, Sn

(kVA)

Rated Line to Line Voltage Un

(kV)

I.E.C Catologue Number

Height

(mm)

Width

(mm)

Length

(mm)

630 12.6 635813 1845 960 1570 50 100 160 250 400 630

22

635888 635904 635912 635938 635979 635995

1375 1485 1535 1600 1670 1845

680 710 720 760 840 1070

1020 1100 1190 1280 1470 1570

50 100 250 400 630

33

5215970 636050 636076 636084 636092

1860 1860 1850 1950 2030

950 950 1000 1010 1070

1220 1220 1280 1450 1730

In case the Bidder can not meet the maximum dimensions requirements in transformers up to 400kVA. The Bidder may offer greater dimensions subject to I.E.C approval during technical stage of the tender.

4.16. Windings

• The winding materials shall be: - copper wire (for high voltage (12.6,22,33 kV) windings);






- copper foil (for low voltage (0.4 kV) windings).

• The 3 (three) High Voltage windings of the transformer shall be identical in order to allow interchangeability.

• The High Voltage windings shall be covered with insulation paper. Technical data of the High Voltage windings (dimensions, number of turns, thickness and type of wire, etc..) shall be supplied to Purchaser for purposes of windings repair, in Purchaser's workshops. The data shall be submitted to I.E.C together with the offer, or when submitting documents to I.E.C for prototype approval.

4.17. Core The transformer shall be of the core type and not the shell type.

4.18. Tap Changer

Every transformer shall be equipped with an off-load tap changer on the high voltage side permitting adjustment to voltages of: • -5%, 0%, +5% of the rated voltage for 22 and 33 kV transformers • -5%, -2.5%, 0%, +2.5%, +5% of the rated voltage for 12.6 kV transformers • The Bidder may offer additional taps within range of ±5%

The tap changer shall be operable manually from outside the transformer when the transformer has no input voltage applied. The tap changer shall be of a type approved by the Israel Electric Corporation. Presently, type ASP (Appareils Scientifiques de Precision - France). The head of the tap-changer on the transformer lid shall be of cast aluminium or steel.

4.19. High Voltage Bushings

Three bushings shall be installed on the high voltage side and shall comply with DIN standards and data given in the following table. The creepage distances of the bushings shall not be less than those given in the following table.

Rated Line to Line

Porcelain Type Current

Creepage Distance

Distance between Bushings Centers

Minimum Distance






Voltage

(KV)

(A)

(Tolerance included)

(mm)

(mm)

between Live Parts

(mm)

12.6 22 33

20NF DIN 42531 30NF DIN 42532

52/1000, DIN 42534

250 630 630

450 630 810

400 ± 5% 400 ± 5% 500 ± 5%

300 300 420

The connection of the conductor to the stem of the High Voltage bushings shall be welded. All exposed metal parts of bushings shall be electrotinned. The Bidder shall submit to the Purchaser Type tests reports of high voltage bushings, for approval of the bushings in the proposed transformers. The type tests shall be performed according to the latest published International Standard IEC 60137 and shall include the following type tests: - Wet power-frequency voltage withstand test (8.1) - Dry lightning impulse voltage withstand test (8.2) - Temperature-rise test (8.5) - Verification of thermal short-time current withstand test (8.6) - Cantilever load withstand test (8.7) - Verification of dimensions (8.11) In addition to the above type test reports, the Supplier shall submit to I.E.C routine and sample test report of the hollow insulators of the high voltage bushings according to the requirements specified in IEC 62155 standard and routine test reports according to the requirements specified in IEC 60137 standard.






The following high voltage bushings are already approved by I.E.C:

Rated line to line

voltage

Bushing Type Approved according to

certificate no.

Porcelain Metallic parts including

stem 12.6 kV 20NF DIN 42531 250A E/NWN/54/94 ZAPEL COMEM

980525-01, 97063255-A

NALDA CED 22 kV

DT 30NF 630 DIN 42532 E/NWN/72/92 ZAPEL COMEM 52 kV 630A with 52kV/1000A porcelain

FORNASARI DOCUMENT 4.3.94

NALDA FORNASARI

DT 45F/1000 DIN 42534 (1954)

E/NWN/62/92 ZAPEL ELCO 33 kV

45 kV/630A with 52kV/1000A porcelain DIN 42534 (1983)

1. NWN/52/94 2. E/NWN/53/94

ZAPEL COMEM

The Bidder who offers the above mentioned approved high voltage bushings (which were approved according to the above test certificates) does not have to submit type tests reports of these bushings.

4.20. Low Voltage Bushings and Low Voltage Connection Clamps

Four bushings shall be installed on the low voltage side and shall comply with Standard EN50386:2002 as follows: - For 50-400 kVA transformers Ir 630 A, Type 3; - For 630 kVA transformers Ir 1250 A, Type 4; All exposed metal parts of bushings shall be electrotinned. The minimum tin coat thickness shall be 20 µm. The connection clamps to be supplied by the Contractor shall be according to the following drawings 1 and 2. for 50- 250 kVA transformers according to the following Drawing 1, for 400kVA and 630 kVA transformers according to the following Drawing 2,

The connection clamps shall be electrotinned.






Voltage

(kV)

Power

(kVA)

Current

(A)

12.6, 22, 33/0.4 50 - 250 630 DRAWING no.1: LOW VOLTAGE CONNECTION CLAMP FOR 50 - 250 kVA TRANSFORMERS






Voltage

(kV)

Power

(kVA)

Current

(A)

Thread D

(mm)

400 630 M20 12.6, 22, 33/0.4

630 1250 M30 x 2

DRAWING 2: LOW VOLTAGE CONNECTION CLAMP FOR 400 AND 630 kVA TRANSFORMERS






4.21. Method of Cooling The cooling method of the transformers shall be: ONAN.

4.22. Grounding Screws

A M12 threaded grounding screw shall be welded on the skid, near the drain tap. A second grounding screw shall be welded on the transformer lid at the low voltage side.

4.23. Nameplates The transformer shall be fitted with a nameplate in Hebrew which contains all the items requested by Standard IEC-60076/1. In addition to the above requirements, the nameplate shall contain the actual value of the noise level (A-weighted surface sound pressure) of the transformer measured in dB(A) at a distance of one meter from the transformer. In all other transformers which the noise level (A-weighted surface sound pressure) was not measured the result value from the type test measurement shall be written in the nameplate. The diagram of connections between High Voltage windings, tap changer and High Voltage bushings shall also be marked on the nameplate. See drawings no. 3 and its translation in English, drawing no 4. The energy efficiency of the transformer shall be marked according to the requirements of the Israeli Standard no. SI 5484. I.E.C catalogue number and the number of this specification shall also appear in the nameplate. The nameplate itself shall be made of anodized sheet aluminium. The nameplate shall be installed on the low voltage connections side. The nameplate shall be approved by I.E.C.






η

* Note: To be used in 12.6 kV transformers

DRAWING NO. 3: RATING PLATE in HEBREW






η

* Note: To be used in 12.6 kV transformers

DRAWING NO. 4: RATING PLATE in HEBREW with translation into ENGLISH






4.24. Marking

4.24.1.1. The phase to be connected to each bushing shall be marked next to it in the following manner: A;B;C on the primary voltage side a;b;c;n on the secondary voltage side next to the grounding screw The above marking shall be stamped and red color painted on tin plates which shall be fastened with glue on the transformer lid. The marking next to grounded screws shall not be painted.

4.24.1.2. The Serial number, power (in kVA) and voltage (in kV) of the transformer shall be marked on the outside on both sides of the expansion tank in white letters, 4 cm high. The format of the markings shall be: first line: AA/YY/XXXXXX/XXXX, where AA - Manufacturer code (will be given by the Purchaser after notification of the award), two (2) letters, YY - year of manufacture, two (2) digits, XXXXXX - series, six (6) digits, XXXX - serial number of the transformer, four (4) digits, second line: PPPP/VVV, where PPPP - rated power of the transformer in kVA, up to four (4) digits, VVV - rated line to line primary voltage of the transformer in kV, up to three (3) digits for example: AA/09/012345/0001 630/22

4.24.1.3. The location of the marking shall be approved by I.E.C. during prototype

approval.

4.24.1.4. An identification plate with the transformer stamped serial number shall be installed on the transformer core in order to allow identification of the transformer parts taken for repair.






4.25. Expansion tank

The expansion tank shall be cylindric and shall be equipped with a spherical drain tap and a closable opening for oil filling. Two oil level indicators shall be installed on both sides of the tank. The oil level indicators shall indicate the oil level at ambient temperatures of O°C, 20°C, 40°C. The oil level shall be clearly seen from the ground when the transformer is pole mounted. For this reason, the diameter of the oil level indicator window shall not be less than 70mm. The diameter of the opening for oil filling on the top of the expansion tank shall be at least 2". An emptying tap directed downwards shall be installed at the bottom of the expansion tank. The expansion tank shall be connected to the transformer lid by means of two (2) cylindric legs. The diameter of the leg shall be shown in a relevant drawing. The expansion tank shall be detachable from the transformer by the use of tools (including the oil tube connection)

4.26. Dehydrating Breather

4.26.1. The breather shall comply with Standard DIN 42567, Part 2 for breathers, with upper part modified (as shown in drawing no. 5 and in sketch A) in order to allow connection of the breather to the tube leaving the expansion tank. The connection shall be by means of R½" threaded coupling in the center of the breather.

4.26.2. Fifty (50) mm from the transformer lid, an additional R½" threaded coupling shall be installed on the tube connecting the breather to the expansion tank (see sketch A). This arrangement is to allow optional installation of the breather at this point.

4.26.3. The breather tube shall be fastened to the transformer structure so that the

breather and its fasteners do not loosen even during transportation.

4.26.4. Teflon tape shall be inserted between the above couplings and the tube to prevent water penetration.

4.26.5. The breather shall be supplied dry, full of silica gel, and with oil in the oil bottom cup. The silica gel shall meet the requirements stated in Specification no. 801 “Non-indicating silica gel for use as desiccant in transformer air dehydrators” Appendix "K" of this Specification. (Data required in this Specification no. 801 shall be submitted to the Purchaser with the offer).






4.26.6. The construction of the tube connecting between expansion tank and breather shall prevent penetration of oil to breather even during transportation.

4.26.7. The breather shall be installed above the emptying tap. The distance between the upper part of the breather and the lower part of the transformer base shall not exceed 60cm.

4.26.8. The minimum distance between the breather and the transformer fins shall be 25 mm.

DRAWING no.5: DEHYDRATING BREATHER – MODIFIED UPPER PART






Sketch A: INSTALATION OF DEHYDRATING BREATHER






4.27. Preparation for Lightning Arresters (L.A.) and fuses

The transformer shall be equipped with galvanized steel plates for installing (L.A.) and fuses, but (L.A.) and fuses shall not be mounted. The arrangement for installing (L.A.) and fuses is shown in sketch B. The above plates shall be welded on the transformer lid, the location of connection area between the (L.A.) and the plates shall not be painted. Transformers with plates welded under the lid will be rejected.

4.28. Painting

The painting of transformer tank, lid, expansion tank and all other steel parts shall be performed in accordance with Manufacturer's Standard procedure and approved by Purchaser.

The color of the top-coat shall be medium grey (RAL 7023 or BS 694). The minimum requirements for approval are the following:

a. Cleaning by sandblasting to "near white" SA 2½ according to ISO 8501-1:1988.

b. Painting with one coat of anticorrosive primer, zinc-chromate alkyd based;

minimum dry film thickness shall be 30 micrometers. c. Painting with one coat of intermediate paint, red iron oxide alkyd based;

minimum dry film thickness shall be 30 micrometers.

d. Painting with medium grey top-coat alkyd based; minimum dry film thickness 30 micrometers.

Remarks: - The minimum total dry film thickness of the paint system except for the lid shall be

90 micrometers.

- With respect to the lid, the first and second coats shall be of double thickness so that the minimum total dry film paint thickness of the lid shall be 150 micrometers.

4.29. Lifting Lugs

Two (2) lifting lugs shall be welded on the transformer lid and shall be of at least 5 cm internal diameter.






Sketch B: ARRANGEMENT FOR INSTALLING (L.A.) AND FUSES






4.30. Type of Oil

The insulating oil filled in transformer shall meet the requirements stated in Purchaser "Specification For Mineral Insulating Oil Supplied With/Within New Electrical Equipment" no.50 dated 1/7/09 - Appendix "E" of this specification. (Data required in this Specification no. 50 shall be submitted to the Purchaser).

4.31. Air Outlet Device Openings shall be provided at suitable places for the escape of air when the oil is added. Their location shall be indicated in the relevant drawings. The screw head in the upper part of the high voltage bushings shall be hexagonal.

4.32. Drainage of the Transformer Tank There shall be an opening at the bottom of the transformer tank for removing oil, in the form of a 1" spherical tap, of high quality (emptying tap). The bottom of the transformer tank and the oil drain opening shall be designed so that the drainage of the bottom of the transformer tank is complete. The tap shall be located at the bottom of the transformer tank on the low voltage bushing side underneath the dehydrating breather.

4.33. Overpressure Relief Device

The transformer shall be equipped with an overpressure relief device of a type approved by the Israel Electric Corporation. The overpressure relief device shall be covered with a suitable "cover" to protect persons in the vicinity of the transformer against the spurting of hot oil in the event of an internal fault of the transformer. The cover (window of the cover) shall be directed toward high voltage side of the transformer. The "cover" shall be of a type approved by the Israel Electric Corporation Ltd.

4.34. Thermometer Pocket The transformer shall be equipped at the top with a cylindric pocket (internal depth: 150mm, 3/4" Gas inner threaded diameter) for a thermometer to measure the oil temperature.

The transformer shall be supplied with the thermometer pocket filled with oil and capped. The transformer pocket shall be welded on the transformer lid. See drawing no. 6.






DRAWING NO. 6: THERMOMETER POCKET






4.35. Transformer base and wheels

Transformer base shall be suitable for pole mounted transformers. The base specification for transformers with rated line to line voltage of 12.6kV and 22kV is given in drawing 7. The base specification for transformers with rated line to line voltage of 33kV is given in drawing 8. Transformers shall be supplied with bases on which wheels can be mounted. The wheels themselves and their mounting shall be in accordance with a special order.

4.36. Tie-Downs

The four top corners of the transformer shall be fitted with steel tie-downs for slings (the tie-down slings) to be used during transportation. The steel tie-down shall be half ring of 50mm internal diameter. The cross section of the ring shall be circular of 10mm diameter.

Tie-downs arrangement on transformer lid is given in following sketch: 4.37. Transformer weight

The maximum transformer weight (including oil) shall not exceed 4000 kg.

Tie-down

Transformer lid

Transformer






DRAWING NO. 7: BASE FOR TRANSFORMERS WITH RATED LINE TO LINE VOLTAGE OF 12.6 kV AND 22 kV

I H G E D C B A kVA 42 130 65 440 320 366 450 860 50 42 130 65 480 380 406 490 860 100 42 130 65 500 420 426 510 970 160 42 130 65 535 460 461 545 1060 250 45 145 80 535 505 455 545 1180 400 45 145 80 570 550 490 580 1200 630






I H G E D C B A KVA

42 130 65 530 425 456 540 960 50&100 45 145 80 590 500 510 600 1150 250 45 145 80 630 530 550 640 1250 400 45 145 80 670 595 590 680 1370 630

DRAWING NO. 8: BASE FOR TRANSFORMERS WITH RATED LINE TO LINE VOLTAGE OF 33 kV






5. Criteria for final comparison of Bidders offers see Appendix "J"

6. PROTOTYPE

6.1. The successful Bidder (henceforth referred to as "the Contractor") shall manufacture one transformer prototype of each ordered type (defined by voltage and power) for Purchaser's approval. The Contractor shall submit to the Purchaser one set of drawings of the prototypes for Purchaser's approval. The drawings shall show the overall outside dimensions, mounting dimensions, and gross weight for the prototype, as well as details of base, cooling fins, tap changer, terminals, primary and secondary bushings, H.V. and L.V. connection schemes, nameplate, expansion tank, dehydrating breather, overpressure relief device and its cover, tank, lid, steel plates for installation of arcing horns abd fuses, oil type. In addition, data of the windings, transformer core and structure shall be shown in a separate drawing.

6.2. The following items shall be approved during the prototype approval: - High Voltage and Low Voltage Bushings - Tap changer - Overpressure relief device - Cover for Overpressure Relief Device - Type of oil - Expansion tank - Oil level indicator - Emptying tap - Groundings screws - Nameplate - Painting - Marking - Transformer base - Lifting lugs - Tie-Downs - Thermometer pocket - Dehydrating breather - Galvanized steel plates (for installation of lightning arresters and fuses) After approval of the above items no changes will be allowed without written approval of the National Network Unit. This approval will be given only in Special cases where severe problems should arise with Subsuppliers of Contractor.






6.3. In addition to the routine tests which shall be performed in any case on each transformer,

the Contractor shall perform the type and special tests on the prototype. The above tests shall be performed according to this Specification and according to IEC 60076 Standard. The above type and special tests shall be performed only after Purchaser's visual inspection and preliminary approval of the prototype.

6.4. The Contractor shall supply the Purchaser 3 (three) copies, in English, of the reports of the

above routine, type and special tests for Purchaser's approval and for Purchaser's final approval of the prototypes.

6.5. After Purchaser's final approval of the prototypes, as soon as possible after tests, but before

delivery of the rest of the transformers, the Contractor shall submit to the Purchaser 2 (two) copies of each routine test report. In addition, the routine test reports shall be submitted to IEC on magnetic media, in diskette form. The format of the results shall be done according to Appendix "I".

6.6. The Purchaser is entitled to cancel the order for the supply of transformers if the prototypes

are not approved by the Purchaser.

6.7. In any case, the Contractor shall not manufacture the rest of the transformers ordered before receiving the Purchaser's final approval of the prototype.

6.8. Any submitted data, report, drawing or descriptive material not written in English or

Hebrew will not be accepted. All dimensions shall be stated in metric units.

6.9. The Contractor shall supply to the Purchaser, if required, and by a particular order at any time during a period of 25 years from last Purchaser's order, spare parts (coils, etc..) for the previously ordered transformers, in the quantities that are needed by the Purchaser for repair of damaged transformers of Contractor's manufacture. The Contractor shall supply to the Purchaser together with the ordered transformers the spare parts in quantities given in the following table:






The spare parts shall be supplied together with spare part list which includes the information stated in paragraph 3.18. In the event the Bidder is of the opinion that the Purchaser should buy other recommended spare parts, such spares should be specified in the Technical proposal. Any submitted data, report, drawing or descriptive material not written in English or Hebrew will not be accepted.

7. TESTS

7.1. General requirements for tests

The tests shall be performed in accordance with the latest published recommendations of the International Standard IEC 60076 and this Specification by and at the expense of the Manufacturer. For High voltage bushings tests please refer to clause 4.18.

Spare Part

Number

Name of Spare Part Quantity of Spare Parts (in per cent of ordered quantity of

transformers in the tender)

1. High Voltage Coil 2%

2. Low Voltage Coil 2%

3. Tap-Changer 4%

4. High Voltage Bushing 3%

5. Low Voltage Bushing 3%

6. Stem of Low Voltage Bushing 4%

7. Low Voltage Connection Clamp 5%

8. Overpressure Relief Device 0.5%

9. Oil Level Indicator 2%

10. Dehydrating Breather 2%

11. Emptying Tap of Transformer Tank 0.5%

12. Emptying Tap of Expansion Tank 0.5%

13. Expansion Tank 2%

14. Transformer Tank 1%






7.2. Type and Special Tests 7.2.1. The following type tests and special tests shall be performed on only one

transformer prototype of the ordered type (defined by voltage and power): - Lightning impulse test on line terminals. - Temperature rise test - Noise level(on not less than three transformers of each ordered type of transformer: first test at prototype approval stage, second test at 30% of the supply scope and third test at 60% of the supply scope) - Short-circuit test

7.2.2. The sum of the measured no-load and load losses of the transformer, on which type and special tests will be performed, shall be equal or less than the sum of its guaranteed no-load and load losses.

7.2.3. Type and Special Test Reports The type and special test reports shall state according to which standard the tests were performed. The test reports shall specify the conditions of the test and the actual values received during the type tests. It shall state the names and have the signatures of those who performed the type tests, those who approved the type tests reports and those who witnessed the tests.

7.2.4. The type and special test reports shall contain a detailed drawing of the tested equipment, photos of the equipment prior to and after the test.

7.2.5. In successful type test the following words must be written in the test report: "The transformer passed the test successfully according to IEC 600076-X Standard (X – relevant standard)".

7.2.6. The type and special test reports of this Specification shall be submitted to Purchaser.

7.3. Type and special tests laboratories: 7.3.1. Type and special tests shall be performed in one of the following international

laboratories: • F.G.H (Germany) • I.P.H (Germany) • CESI (Italy)

• KEMA (Netherlands) • VEIKI-VNL (Hungary)






In order to perform the type and special tests in other laboratories a prior written approval by I.E.C National Network Unit is required at the technical stage of the Bid.

The Contractor shall perform those type and special tests in well-known authorized laboratories (ISO/IEC 17025 or EN 45011 approved). I.E.C reserves the right to approve laboratories (situated in Israel and without ISO/IEC 17025 or EN 45011 certification) to perform those tests, after successful audit by the I.E.C Electrical R&D Laboratory.

7.3.2. The Contractor shall submit to the I.E.C National Network Unit, forty five (45) days before performing those type and special tests, the names of the laboratories and the programs of those type and special tests for I.E.C approval.

7.3.3. I.E.C reserves the right to participate in those type and special tests.

7.4. Routine Tests 7.4.1. A routine test shall be performed by the Contractor for each ordered transformer

7.4.2. Duly certified routine tests are obligatory. Such tests shall be performed at the

Manufacturer’s laboratory.

7.4.3. Each supplied transformer shall be tested in accordance with IEC 60076-1 Standard.

7.4.4. I.E.C reserves the right to participate in those routine tests. The Contractor shall notify I.E.C one month before those tests performance, in order to allow I.E.C staff to participate in those tests.

7.4.5. Energy efficiency value shall be stated in the Routine Test Report.

7.4.6. In addition, one transformer (at least) of each series of transformers which were filled with oil in the same day and from the same tank of oil, shall be tested for withstanding oil breakdown voltage only - in accordance with Appendix "E". The results shall be reported to I.E.C. Quality Control staff.

7.5. Routine Test Report • Every transformer shall be tested in accordance with, and shall withstand, the tests

specified in the IEC-60076 Standard as "Routine Tests". • The routine test report shall state according to which standard and clause the test was

performed. • The Routine Test Report shall contain the transformer rated data, serial number and the

results of the tests, the required values and the values obtained during the test. • The routine tests reports shall be submitted to Purchaser up to one month prior to

delivery of the first batch of the offered transformers.






• In addition, the routine test reports shall be submitted to IEC on magnetic media, in diskette form. The format of the results shall be done according to Appendix "I".

• Energy efficiency shall be written in the routine Test report. • The results of the No-load losses, Load losses derived from the routine tests shall be

send to the Quality Control of the I.E.C and to the National Network Unit by E-mail by Microsoft Excel files as follows: Frame order number, date of supply, transformer serial number, no-load losses, load losses.

8. Quality Requirements

8.1. Quality Assurance The Quality Assurance requirements are according to the attached documents of the supply and storage division.

8.2. Quality control The quality control measures applied during the production of the transformers shall conform to the requirements specified in Appendix "H". In addition to the requirements of Appendix "H" (Q-APP-02, Rev. 4) the bidder shall submit with his proposal a preliminary Quality Plan and Inspection and test Plan (as defined in clauses 2.2 and 2.3 of Q-APP-02). Representatives of the Israel Electrical Corporation shall be authorized to visit the Manufacturer's plant, witness tests and obtain full details of each phase of the transformer's production. After product approval by the contractor’s personnel, the purchaser quality control representative will inspect a sample according to International Standard ISO 2859 – 1 “sampling procedures for inspection by attributes”. Inspection level II, acceptance number 0 and rejection number 1.






9. SUMMARY OF DATA (to be filled separately for each proposed type of transformers)

Summary Of Data For Distribution Network Power Transformers

Name of Bidder: ________ Rated Primary Line to Line voltage: ___________ kV Rated Power: ____________ kVA

Signature of Bidder _____________________

(Insert all data in this column)

9.1. DRAWINGS, INSTRUCTIONS AND WEIGHT

9.1.1 Drawings of the transformer (including overall dimensions) …...........................(attached/not attached)

9.1.2 Mounting instructions (including ventilation instructions) ……………………….....................(attached/not attached)

9.1.3 Drawing of the nameplate ...........(attached/not attached)

9.1.4 Drawings of the tank and oil level indicators (and connection to the dehydrating breather).

Drawings …………………........... (attached/not attached)

9.1.5 Drawing of the primary voltage connectors

..............................................................(attached/not attached)

9.1.6 Drawing of the secondary voltage connectors

......................................................(attached/not attached)

9.1.7 Weight of the transformer (including oil) ................ (kg)

9.1.8 Amount of oil in the transformer............................(litres)

9.1.9 Painting specification ...................(attached/not attached)

9.2 OVERALL DIMENSIONS (including all accessories and appurtenances )

9.2.1 Height .................................................................... (mm)

9.2.2 Width ..................................................................... (mm)

9.2.3 Length .................................................................... (mm)

9.3 GENERAL DATA

9.3.1 What is the type number of the proposed transformer?






Name of Bidder: _______________________



9.3.2 Rated primary line to line voltage ........................ (kV)

9.3.4 Rated secondary line to line voltage..................... (kV)

9.3.5 Rated frequency .................................................. (Hz)

9.3.6 Number of phases ...............................................

9.3.7 Identification symbol cooling method (method of cooling)

9.3.8 Group of connection

9.3.9 Rated power ...................................................... (kVA)

9.3.10 Short-circuit impedance at rated current ..............(%)

9.3.11 Rated insulation level at the primary voltage side

9.3.11.1 BIL (1.2/50µsec) ............................... (KV peak)

9.3.11.2 at a frequency of 50 Hz, for one minute …………………………………………….(kV r.m.s.)

9.3.12 Rated insulation level on the secondary voltage side at a frequency of 50 Hz, for one minute ……………………………………………….(kV r.m.s.)

9.3.13 Is the customers list with quantities of transformers attached? ..................................................... (Yes/No)

9.3.14 Does the oil comply with the Specification given in Appendix "E" of this Specification? ............. (Yes/No)

9.3.15 Temperature rise of the top layer of oil ................ (K)

9.3.16 Temperature rise of the windings ........................ (K)

9.3.17 Noise level (A-weighted surface sound pressure level [LpA]) measured at a distance of one meter) ....(dB(A))

9.3.18 Is this transformer suitable for outdoor installation? …………………………………………….(Yes/No)

9.3.19 Is the Manufacturer's Quality Control Manual included in the Bidder's proposal ? ................................... (Yes/No)






Name of Bidder: _______________________



9.4 STRUCTURE AND ACCESSORIES

9.4.2 Windings shape and material (eg. foil, round, square, Al, Cu, etc)

Primary voltage side

Secondary voltage side

9.4.2.1 Material of the windings................................

9.4.2.2 Shape of the windings...................................

9.4.2.6 Average windings temperature rise limits at rated current ……………………............. (K)

9.4.2.7 Manufacturer name of the windings

9.4.5.9 Is the primary voltage bushings catalogue attached? ...................................... (Yes/No)

9.4.5.9 Is the secondary voltage bushings catalogue attached? ...................................... (Yes/No)

9.4.5.12 What is the minimal distance between live and earthed metal parts ……………....... (mm)

9.4.3 Are the 3 (three) high voltage windings of the transformer identical in order to allow interchangeability?.... (Yes/No)

9.4.4 High voltage bushings

9.4.4.1 Number of high voltage bushings ........................

9.4.4.2 Rated voltage of the high voltage bushings ..(kV)

9.4.4.3 Rated current of the high voltage bushing ......(A)

9.4.4.4 Creepage distance of the high voltage bushings? .................................................................. (mm)

9.4.4.5 High voltage bushings complying with Standard ..

9.4.4.6 Name of the high voltage bushings manufacturer and its type ....................................................... Name of stem manufacturer …………………… Name of porcelain manufacturer …….…………

9.4.4.7 Distance between centers of the high voltage bushings ................................................... (mm)






Name of Bidder: _______________________



9.4.4.8 Minimum distance between live parts the high voltage bushings.......................................(mm)

9.4.4.9 Minimum distance between high voltage live parts and metallically grounded parts.................(mm)

9.4.5 Low Voltage Bushings

9.4.5.1 Number of low voltage bushings .......................

9.4.5.2 Rated voltage of the low voltage bushings .. (kV)

9.4.5.3 Creepage distance of the low voltage bushing ...................................................................(mm)

9.4.5.4 Rated current of the low voltage bushing ..... (A)

9.4.5.5 Low voltage bushings complying with Standard ..

9.4.5.6 Name of the low voltage bushings manufacturer and its type ................................................

9.4.5.7 Is the neutral low voltage bushing the same as the phase low voltage bushing ? ................(Yes/No)

If not, note the rated voltage, creepage distance, rated current name and number of Standard and name of manufacturer ..........................

9.4.5.8 Distance between centers of the low voltage bushings ...............................................(mm)

9.4.5.9 Distance between live parts of the low voltage bushings .............................................(mm)

9.4.5.10 Minimum distance between low voltage live parts and metallically grounded parts ......(mm)

9.4.5.11 Is the low voltage bushings catalogue attached ? .........................................................(Yes/No)

9.4.6 Type and manufacturer of overpressure relief device. Please add technical data of the device.

Data ........................................... (attached/not attached)

Drawings ....................................(attached/not attached)






Name of Bidder: _______________________



9.4.7 What kind of dehydrating breather is the transformer equipped with?

(Note: Standard, drawings, dimensions, volume or weight of silica gel) .................................................

9.4.8 Ratings of the tap changer ………………………..(%) 9.4.8.1 Tap changer type ………………………. 9.4.8.2 Tap changer manufacturer name ………. 9.4.8.3 Number of taps …………………………

9.4.9 Are the proposed transformers of the core type? ……………………………………………….(Yes/No)

9.4.10 Is the overpressure relief device covered with a "cover" to protect persons in the vicinity of the transformer against the spurting of hot oil in the event of an internal fault? ........................................................................(Yes/No)

Please attach relevant drawings of the "cover". Drawings .................................(attached/not attached)

9.4.11 Oil Tests

9.4.11.1 According to which Standards the oil test is carried out ? ………………………………..

9.4.11.2 Does the oil comply with the requirements for oil given in Appendix "E" of this Specification ? ..................................................... (Yes/No)

9.4.11.3 If not, to which Standards ? ...............................

9.4.11.4 Is the oil data (as requested in Appendix "E" of this Specification) included in the Bidder's proposal? ..................................... (Yes/No)

9.5. HIGH VOLTAGE BUSHINGS TYPE TESTS

9.5.1 Are the high voltage bushings type tests reports as required in clause 4.19 of this specification attached to the Bidder's proposal? ................. ………………………..(attached/not attached)






Name of Bidder: _______________________

Signature of Bidder _____________________ (Insert all data in this column)

9.6 ROUTINE TESTS

9.6.1 Are the routine tests carried out according to the IEC 60076-1 Publications ? ..................... (Yes/No)

9.7. TYPE TESTS AND SPECIAL TESTS

9.7.1 Tests of temperature rise

9.7.1.1 Are the temperature rise tests carried out according to the latest IEC 60076-2 Publication? ……………………………. (Yes/No)

9.7.1.2 Is the temperature rise test report included in the Bidder's proposal ? .................................. (Yes/No)

9.7.2 Tests of the insulation levels and dielectric tests.

9.7.2.1 Are the insulation levels and dielectric tests carried out according to the latest IEC 60076-1 and IEC 60076-3 Publications? ............................. (Yes/No)

9.7.2.2 Are the insulation level and dielectric test reports included in the Bidder's proposal ? .......... (Yes/No)

9.7.3 Ability to withstand short-circuit tests

9.7.3.1 Is the short-circuit withstand test carried out according to latest IEC 60076-5 Publication? ………………………….. (Yes/No)

9.7.3.2 Is the ability to withstand short-circuit tests report included in the Bidder's proposal? ............(Yes/No)

9.7.4 Noise level test

9.7.4.1 Is the noise level test carried out according to latest IEC 60076-10 Publication? ………….. (Yes/No)

9.7.4.2 Is the noise level test report included in the Bidder's proposal? ..............................................(Yes/No)

9.8 Do the transformers fulfill the requirements of the SI 5484 standard ? (Distribution transformers - Requirements for energy efficiency and labeling) ..............................................(Yes/No)






10 - CONFORMITY WITH PROPOSAL DOCUMENTS Supplier hereby certifies that he agrees to all provisions of the Proposal Documents unless exceptions are specifically and clearly listed in the proposal and identified as exceptions. Supplier's printed terms and conditions are not considered specific exceptions. Any exceptions which Supplier has taken are listed on Page . Supplier hereby certifies that he agrees to all conditions of the Cover Letter of The Israel Electric Corporation Limited which accompanied the Proposal Documents.

Signature of Supplier Date of Proposal






APPENDIX "A"

Manufacturer Experience to the Purchaser’s satisfaction






Manufacturer Experience

1. The Manufacturer shall have at least 5 (five) years experience in manufacturing the offered equipment.

2. In case the Manufacturer does not have at least 5 (five) years experience in manufacturing the

offered equipment the Manufacturer shall have a Know-How agreement with a company which has at least 5 (five) years experience in manufacturing the offered equipment, and both companies shall have a Quality Management System (QMS) which meets the requirements of ISO Standard 9001:2000.

3. The experience described in paragraph 1 or 2, as applicable, shall be proven by a declaration (including a customer list) certified by an attorney, or notary, as applicable, which shall be submitted by the Manufacturer together with his offer to the Purchaser. The customer list shall include type of equipment, name and telephone number of customer, quantities and supplies dates. The customer list shall reflect at least 3000 Distribution Network Power Transformers supplied by Manufacturer or by Know-How Supplier.






APPENDIX "B"

Type and special tests declaration






Declaration To be returned signed and stamped by Supplier

We hereby declare, that in case of award we will perform at our own expense and responsibility, type and special tests as required in paragraph 7 of Specification NTS-103 and submit to the Purchaser the reports, in English, of these type and special tests at least one month before shipment of the ordered transformers.

Name of Supplier: Signature and stamp of Supplier: Date:

Tender No. _______________






APPENDIX "C"

Declaration regarding the guaranteed losses of the proposed transformers






Declaration To be returned signed and stamped by Supplier

We hereby declare, that in case of award the No-load and Load losses of the proposed transformers will not exceed the values given in paragraph 4.10 of Specification NTS-103. Name of Supplier: Signature and stamp of Supplier: Date:






APPENDIX "D"

Know – How agreement to the Purchaser’s satisfaction






Know – How Agreement Where a "know-how" agreement is required under the tender/inquiry documents, or under the specifications, such "know-how" agreement must include the following commitments, or substantially similar commitments, on part of the provider of the know-how: 1. To transfer to the know-how recipient, all the technical documents and drawings, necessary for

the manufacturing, fabrication, testing, proper packing, operating and maintaining of the proposed equipment;

2. To adequately instruct and provide technical support to the know how recipient in the field of manufacture/fabrication, design, quality control, testing and repair of the proposed equipment;

3. To conduct an inspection of the manufacturing line of the know-how recipient and to approve its adequacy to manufacture the proposed equipment up to the standards of the know-how provider;

4. To participate in type tests of the proposed equipment (of the know how recipient's manufacture) and to instruct/support the know-how recipient in undertaking corrective act/procedure, if required or approved by the I.E.C;

5. To provide technical support/instructions to the know-how recipient during the first two years following the start of manufacturing by the know-how recipient.

The I.E.C waives any and all claims it may have against the know-how provider, for any conduct, act or omission, on part of the know-how provider, or any of its employees, agents, or representatives, directly or indirectly related to the transfer of know-how, the know-how agreement, or any action, or omission thereunder. This waiver of claims shall insure to the benefit of the know-how provider and to the benefit of any of its employees, agents or representatives. Nothing said herein shall release the know-how recipient from any duties or commitments, undertaken by it, as part of its proposal to the I.E.C, or in connection with any failures or omissions to carry out such duties, or commitments.






APPENDIX "E"

SPECIFICATION no.50

FOR MINERAL INSULATING OIL

SUPPLIED WITH/WITHIN NEW ELECTRICAL EQUIPMENT

July 2009


National Network Unit Edition No.: 5 Issued date: June 2011 Page No. 55 of 91































APPENDIX "F"

Declaration regarding fulfillment of requirements of SI 5484 Israeli Standard





Declaration

To be returned signed and stamped by Supplier

We hereby declare, that the proposed transformers shall fulfill the requirements of the SI 5484 Israeli Standard (Distribution transformers – Requirements for the efficiency and labeling). We hereby declare, that after notification of award, at the prototype approval stage, if we will be the successful Bidder, we shall submit to the National Network Unit of I.E.C written approval issued by the Standards Institution of Israel that, each awarded prototype meets the requirements of the published Israeli Standard regarding energy efficiency and marking.

Name of Supplier: Signature and stamp of Supplier: Date:





APPENDIX "G"

Required schedule for prototype approval of

Distribution Network Power Transformers





Required schedule for prototype approval of Distribution Network Power Transformers - I.E.C. Inquiry no.

Weeks STAGE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22

1 Starting date (*) 2 Submission of drawings and technical data for

the transformer and its accessories to I.E.C. for approval

3 Drawings approval by I.E.C. including clarifications.

4 Submission of date, laboratory name and plan for type tests (for I.E.C approval)

5 Manufacture of the prototypes 6 Visual inspection of the prototypes 7 Routine tests performance 8 Type tests performance and submission of

preliminary type tests reports

9 Submission of the final type test reports for approval

10 Submission of the approval of meeting the requirements of the latest published official S.I regarding energy efficiency and marking

11 Type tests report approval 12 Prototypes approval Bidder name and title: Bidder signature (*)- the date on which contractual obligation has been created between the parties, as specified in the invitation to submit proposals in the Tender/RFP.






APPENDIX "H"

QUALITY REQUIREMENTS

(SPECIFICATION Q - APP – 02, Rev 4)






APPENDIX "I"

Routine Tests Results

on

Magnetic Media In Diskette Form

Israel Electric Corp. Ltd. Information Systems and Communication Division Dept. of Technical Information Systems

March 1999

Subject: Routine Tests on I.E.C. Distribution Transformers -

Method of forwarding results to I.E.C.

I Preface I.E.C. is required to computerize the results of the routine distribution transformer tests carried out by the manufacturers. This will be facilitated by forwarding the results to I.E.C. in diskette form, in accordance with the following format and conditions.

II Packaging A. The packaging will be such as to prevent heat and mechanical damage to the diskettes.

B. Two identical copies of the results will be sent (in order to guarantee the information).

III Support documentation Each diskette will be forwarded with a document containing the following information:

A. List of distribution transformers on the diskette (serial numbers).

B. Total number of distribution transformers in the whole shipment.

C. Total number of enclosed diskettes.

D. Relevant details regarding the format of the data (ASCII/ANSI, Windows/Dos).

IV Diskettes A. The information will be forwarded to I.E.C. on 3.5” floppy diskettes of 1.44 Mb capacity.

B. The diskettes will be formatted by a procedure compatible with Microsoft’s DOS/windows format procedure as follows: Formatting command: FORMAT A:/F:1.44.

C. Before sending, the diskettes will be tested and checked to guarantee them to be virus-free.

D. When sent, the diskettes will be write protected (by closing the write- protect switch on the diskette).

V. The Data

A. The forwarded data will be in ASCII, 8 Bit (ANSI/ WINDOWS OR ASCII/ DOS) format.

B. The records will be built as follows:

(1) The structure of the records must conform with the specifications below and the specifications in the appendix.

(2) There are 6 types of records. Records of type 1 to 4 will be placed at the beginning of the file, followed by all records of type 5 and than all records of type 6. Each record of type 5 and type 6 describe one transformer test (and must be in correlating order).

(3) The length of record type 5 is 309 characters.

(4) The length of record type 6 is 274 characters.

(5) All numeric fields should be aligned to the left.

(6) All fields are mandatory, except the fourth and the fifth entry of the vector “Voltage ratio and phase displacement check” and the field “Oil breakdown withstanding voltage”, which may be left empty. Fields of “Voltage ratio and phase displacement check” may contain negative values.

VI. All these specifications must be respected and provided by each manufacturer required to supply this product.

Yair Baron

Department Manager

Enc.:

Specification of format of records for Transformer routine Tests.

Specification of format of records for

Transformer Routine Tests

Rec.

Description Num./A-N

Field Length

(Total/ Integer.

frac)

Units Format/ Options/ Comments

1. (text/heading) α/Ν 13 - Must contain: ‘MANUFACTURER:’

2. Manufacturer α/Ν 60 - Actual name of manufacturer.

3. (text/heading) α/Ν 28 - Must contain: ‘CUSTOMER:ISRAEL ELECTRIC Co.’

4. (text/heading) α/Ν 30 - Must contain: ‘TRANSFORMERS ON THIS SHIPMENT:’

5. Actual number of transformers in shipment

Ν 2 - The maximum number of transformers may not exceed 20 !

6. (empty/insignificant record)

- - - Blanks

7. Three Phase Transformer α/Ν 60 - Oil immersed with

conservator Oil immersed - Sealed Cast – Resin

8. Delivery date α/Ν 10 Dd/mm/yyyy; MANDATORY! The Delivery date should be the latest date between : Manufacture date, Test date.

9. Manufacture date α/Ν 10 Dd/mm/yyyy;

MANDATORY! 10. Test Date α/Ν 10 Dd/mm/yyyy;

MANDATORY! 11. Customer’s

Spec. No. α/Ν 10

12. Order no. α/Ν 15

13. Serial no. α/Ν 17 AA/YY/XXXXXX/ZZZZ, Where: AA – Manufacturer code, YY – Year, XXXXXX – Serial No./ manufacturing, ZZZZ - Sequence number.

Rec.


Field Length

(Total/ Integer.

frac)


14. Type α/Ν 25

15. Rated Power N 4.0 KVA

16. Frequency N 2.0 Hz Value: 50

17. Vector Group α/Ν 5 DYn11

18. Primary Rated Voltage Ν 2.1 KV Allowed values:

12.6, 22, 33

19. Secondary Rated Voltage Ν 3.0 V

20. Primary Rated Current Ν 2.2 A

21. Secondary Rated Current Ν 4.2 A

22. Insulation Class α/Ν 1

23. Cooling α/Ν 4

24. Short Circuit Current

N 1.3 KA

25. Short Circuit Duration- Max

N 1.0 sec

26. Total Weight N 1.3 t

27. Oil Weight N 3.0 Kg

28. Winding Resistances (This is not a field! This describes the following fields).

29. Principle Tap Voltage

N 5.0 V

30. At Temperature N 2.1 °C

31. Winding Resistance A-B

N 2.3 Ohm

32. Winding Resistance B-C

N 2.3 Ohm

33. Winding Resistance C-A

N 2.3 Ohm

34. Winding Resistance a-b

N 2.3 mOhm

35. Winding Resistance b-c

N 2.3 mOhm

36. Winding Resistance c-a

N 2.3 mOhm

Rec.


Field Length

(Total/ Integer.

frac)


37. Voltage Ratio and Phase Displacement Check

(This is not a field! This describes the following fields).

38. Tap Voltage 1 N 5.2 V

39. Voltage Ratio AB/an

N 3.3 Negative value allowed.

40. Voltage Ratio BC/bn


41. Voltage Ratio CA/cn






























58. Vector Group α/Ν 5 Dyn11

59. Short Circuit Impedance and Load Loss


60. Tap N 1.0 61. Mean

Temperature N 2.1 °C

62. VA-B N 3.2 V

63. VB-C N 3.2 V

64. VC-A N 3.2 V

65. Average Voltage N 3.2 V

66. IA-B N 2.3 A

67. IB-C N 2.3 A

Rec.


Field Length

(Total/ Integer.

frac)


68. IC-A N 2.3 A

69. Average Current N 2.3 A

70. Total Losses N 5.1 W

71. Losses at Temperature According to Standard

(This is not a field! This describes the following fields). Oil Immersed at 75˚ C Cast Resin at 120˚ C

72. Padd N 4.0 W

73. I ² RH .V. + I 2 RL.V.

N 5.1 W

74. Ptot N 5.1 W

75. Vz% N 1.2 %

76. Vr% N 1.2 %

77. Vx% N 1.2 %

78. No Load Loss and Current


79. Tap. Ν 1.0 80. Va-b N 3.2 V

81. Vb-c N 3.2 V

82. Vc-a N 3.2 V

83. Ia N 1.2 A

84. Ib N 1.2 A

85. Ic N 1.2 A

86. Average Current N 1.2 A

87. No Load Losses N 4.1 W

88. Dielectric Test (This is not a field! This describes the following fields).

89. Voltage Frequency

N 2.0 Hz The value 50.

90. H.V. Withstand Voltage

N 2.2 K.V. R.M.S

91. Application Duration

N 2.0 sec

92. L.V. Withstand Voltage.

N 1.2 K.V. R.M.S

93. Application Duration

N 2.0 sec

94. Induced Over Voltage (This is not a field! This describes the following fields).

95. Applied Voltage N 3.1 K.V. R.M.S

Rec.


Field Length

(Total/ Integer.

frac)


96. Frequency N 3.0 Hz Usually the value 125.

97. Duration N 2.1 sec

98. Oil Test (This is not a field! This describes the following fields).

99. Oil Type α/Ν 20 100 Oil Breakdown

Withstand Voltage

N 2.1 K.V. (may be left empty)






APPENDIX "J"

CRITERIA FOR FINAL COMPARISON OF BIDDERS OFFERS (which have fulfilled all tender requirements)






Criteria for final comparison of Bidders offers (which have fulfilled all tender requirements) for Oil-Immersed Distribution Network Power Transformers

For selection of the offer which provides the maximum benefit to the Purchaser, the following benefits (parameters) will be taken into account in the techno-economical comparison of Bidders offers:

Parameter Weight

(in %) 1. Experience in Utilities with at least 3000 Transformers of Supplier's Manufacture (10) Largest number of transformers supplied - 10; Smallest number of transformers supplied - 7; Other - proportional

10

2. Number of taps of tap changer (10) Number of taps according to requirements of the specification - 7; Larger number of taps - 10

10

3. Product Quality (shall be checked during sample inspection) (80)

3.1 Maintainability (40) 3.1.1 Low and High voltage windings Combined – 7; Not combined – 10 3.1.2 Connections method Welding and Pressing – 10; Welding - 8; Pressing – 7 3.1.3 Connections of the High voltage windings Identical - 10; Not identical – 7 3.1.4 Sealing type of tank Rubber – 10; Others – 7

10

10

10

10

3.2 Finish (10) 4.2.1 Paint Quality Homogenous - 5; Not Homogenous – 3.5 4.2.2 Rust traces No traces found – 5; Traces found– 3.5

5 5

3.3 Structure (30) 3.3.1 Circular/ Oval windings Circular - 10; Oval - 7 3.3.2 Metal/Wood structure supporting active part Metal - 10; Wood - 7 3.3.3 Circular/square High voltage wire Circular - 10; Square - 7

10

10

10

Minimum grade of the technical evaluation of the proposal which fulfils I.E.C technical requirements will be 70.






APPENDIX "K"

SPECIFICATION no.801

NON-INDICATING SILICA GEL FOR USE AS DESICCANT

IN TRANSFORMER AIR DEHYDRATORS






APPENDIX "M"

SUMMARY OF PRICES (to be filled separately for each proposed type of transformers)






SUMMARY OF PRICES (to be filled separately for each proposed type of transformers)

TRANSFORMER RATING

Name of Bidder: ________ ______________________

Rated Primary Line to Line voltage: ___________ kV Signature of Bidder: ______________________

Rated Power: ___________ kVA Origin of Manufacturer (Insert prices and data in this

column) Non Israeli

Currency NIS

1 PRICES 1.1 Firm price for one (1) transformer including oil with the above

mentioned rating, complete with all accessories and appurtenances as specified in Specification NTS-103. The above mentioned firm price shall include the price for the routine. The price for the type and special tests shall not be included in the above mentioned firm price and shall be given separately in following paragraph1.2.

1.2 Prices for the following type and special tests as

specified in clause 7.2 of this specification:

1.2.1 Lightning impulse test on line terminals 1.2.2 Temperature rise test 1.2.3 Short-circuit test (Special test) 1.2.4 Noise level test (on three transformers)

(Special test)

2. POWER LOSSES AND NO-LOAD CURRENT 2.1 No-load current …………………………………….. % 2.2 No-load losses ………………………………….... Watts 2.3 Load losses (75º C) ………………………………. Watts






TRANSFORMER RATING Name of Bidder: _________________________

Rated Primary Line to Line voltage: kV Rated Power: kVA Origin of Manufacturer:

Signature of Bidder _________________________ _________________________

(Insert prices and data in this column)

Non Israeli Currency

NIS

3 Prices for following spare parts according to quantities given in paragraph 5.8 of this Specification:

3.1 One (1) High Voltage Coil ................................

3.2 One (1) Low Voltage Coil .................................

3.3 One (1) Tap-Changer ........................................

3.4 One (1) High Voltage Bushing .........................

3.5 One (1) Low Voltage Bushing ..........................

3.6 One (1) Stem of Low Voltage Bushing ............

3.7 One (1) Low Voltage Connection Clamp .........

3.8 One (1) Overpressure Relief Device .................

3.9 One (1) Oil Level Indicator ..............................

3.10 One (1) Dehydrating Breather .........................

3.11 One (1) Emptying Tap of Transformer Tank ..

3.12 One (1) Emptying Tap of Expansion Tank .....

3.13 One (1) Transformer Tank ...............................

3.14 One (1) Expansion Tank ..................................

____________ ___________ Signature of Bidder Date of Bid