N-0312i-E

N-312 REV. E ENGLISH JAN / 2004

PROPERTY OF PETROBRAS 13 pages and Index of Revisions

LIQUID-IMMERSED POWER TRANSFORMER

Specification

This Standard replaces and cancels its previous revision.

The CONTEC - Authoring Subcommittee provides guidance on the interpretationof this Standard when questions arise regarding its contents. The Department of PETROBRAS that uses this Standard is responsible for adopting and applyingthe clauses thereof. CONTEC

Comissão de Normas Técnicas

Technical Requirement: a provision established as the most adequate and which shall be used strictly in accordance with this Standard. If a decision is taken not to follow the requirement (“non-conformity” to this Standard) it shall be based on well-founded economic and management reasons, and be approvedand registered by the Department of PETROBRAS that uses this Standard. It is characterized by the verb forms “shall,” “it is necessary...,” “is required to...,” “it isrequired that...,” “is to...,” “has to...,” “only ... is permitted,” and other equivalentexpressions having an imperative nature.

Recommended Practice: a provision that may be adopted under the conditions of this Standard, but which admits (and draws attention to) the possibility of therebeing a more adequate alternative (not written in this Standard) to the particularapplication. The alternative adopted shall be approved and registered by theDepartment of PETROBRAS that uses this Standard. It is characterized by theverbal form “should” and equivalent expressions such as “it is recommendedthat...” and “ought to...” (verbs of a nonmandatory nature). It is indicated by the expression: [Recommended Practice].

Copies of the registered “non-conformities” to this Standard that may contribute to the improvement thereof shall be submitted to the CONTEC - Authoring Subcommittee.

Proposed revisions to this Standard shall be submitted to the CONTEC -Authoring Subcommittee, indicating the alphanumeric identification and revisionof the Standard, the clause(s) to be revised, the proposed text, andtechnical/economic justification for revision. The proposals are evaluated during the work for alteration of this Standard.

SC - 06

Electricity

“The present Standard is the exclusive property of PETRÓLEO BRASILEIRO S.A. - PETROBRAS, for internal use in the Company, and any reproduction for external use or disclosure, without previous and express authorization from the owner, will imply an unlawful act pursuant to the relevant legislation through which the applicable responsibilities shall be imputed. External circulation shall be regulated by a specific clause of Secrecy and Confidentiality pursuant to the terms of intellectual and industrial property law.”

Foreword

PETROBRAS Technical Standards are prepared by Working Groups – GTs (consisting of specialists from PETROBRAS and its Subsidiaries), are commented by PETROBRAS Units and PETROBRAS Subsidiaries, are approved by the Authoring Subcommittees - SCs (consisting of specialists from the same specialty, representing the various PETROBRAS Units and PETROBRAS Subsidiaries), and ratified by the CONTEC Plenary Assembly (consisting of representatives of the PETROBRAS Units and PETROBRAS Subsidiaries). A PETROBRAS Technical Standard is subject to revision at any time by its Authoring Subcommittee and shall be reviewed every 5 years to be revalidated, revised or cancelled. PETROBRAS Technical Standards are prepared in accordance with standard PETROBRAS N-1. For complete information about PETROBRAS Technical Standards see PETROBRAS Technical Standards Catalog.

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FOREWORD This Standard is the English version (issued in DEC/2004) of Standard PETROBRAS N-312 REV. E JAN/2004. 1 SCOPE 1.1 This Standard establishes the requirements for the purchase of power transformers immersed in insulating liquid used at PETROBRAS facilities. 1.2 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, this Standard is not applicable to:

a) dry type power transformers, in which case standard PETROBRAS N-1911 shall be used;

b) dry type transformers for lighting or instrumentation systems, in which case standard PETROBRAS N-2201 shall be used;

c) grounding transformers; d) frequency converter-fed transformers; e) transformers fully dedicated to feeding loads with non-sinusoidal currents.

Note: This Standard is also applicable to transformers in which only part of the loads

have currents with non-sinusoidal characteristics, provided due care is taken with regard to the sizing of the transformer and its constructive characteristics.

1.3 This Standard is applied to works started as of its date of issuance. 1.4 This Standard contains only Technical Requirements. 2 SUPPLEMENTARY DOCUMENTS The documents listed below are mentioned in the text and contain valid requirements for the present Standard.

Regulamento Técnico DNC No 03/94 - Portaria DNC No 46; PETROBRAS N-381 - Execution of Drawing and Other General Technical

Documents; PETROBRAS N-1219 - Cores; PETROBRAS N-1559 - Transformador de Potência - Folha de Dados; PETROBRAS N-1735 - Pintura de Máquinas, Equipamentos Elétricos e

Instrumentos; PETROBRAS N-1911 - Transformadores Secos para Transmissão e

Distribuição de Energia Elétrica; PETROBRAS N-2033 - Fabrication Inspection - Personnel Qualification; PETROBRAS N-2201 - Dry Transformer for Lighting or Instrumentation

Systems; ABNT NBR 5356 - Transformador de Potência; ABNT NBR 5380 - Transformador de Potência; ABNT NBR 5458 - Transformador de Potência;



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ABNT NBR 5597 - Eletroduto Rígido de Aço-Carbono e Acessórios com

Revestimento Protetor, com Rosca ANSI/ASME B1.20.1;

ABNT NBR 6146 - Invólucros de Equipamentos Elétricos - Proteção; ABNT NBR 8667 - Comutador de Derivações em Carga; ABNT NBR 10861 - Prensa-Cabos; ANSI/ASME B 1.20.1 - Pipe Threads, General Purpose; IEEE Std. C57.110 - Recommended Practice for Establishing Transformer

Capability When Supplying Nonsinusoidal Load Currents.

Note: For documents refered is this Standard and for which only the Portuguese version

is available, the PETROBRAS department that uses this Standard should be consulted for any information required for the specific application.

3 GENERAL CONDITIONS 3.1 The transformer shall be designed and manufactured in accordance with the recommendations contained in standard ABNT NBR 5356. The terminology to be adopted in the technical documentation shall comply with standard ABNT NBR 5458. 3.2 The routine tests on the transformer, as well as type and special tests, when requested on the Data Sheet of standard PETROBRAS N-1559, shall be conducted in accordance with standard ABNT NBR 5380. 3.3 The manufacturer shall indicate, when the Data Sheet of standard PETROBRAS N-1559 is completed, other ABNT/IEC standards also applicable to the supply, in addition to those listed in Chapter 2 of this Standard. In case of conflicts, the requirements of the standards explicitly mentioned in Chapter 2 will prevail. 3.4 The transformer Data Sheet is generally partly completed and issued by PETROBRAS, with the manufacturer being responsible for filling in all remaining spaces left blank. For each transformer identification number there is a corresponding Data Sheet to which a specific identification is assigned for that application. The blank form used for the issuance of the transformer Data Sheet is standardized by standard PETROBRAS N-1559. Additional sheets, when necessary, shall follow the standards given in standard PETROBRAS N-381. 3.5 Whenever there are discrepancies between the Data Sheet of standard PETROBRAS N-1559 and this Standard, the information contained in the former shall prevail.







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4 CONSTRUCTIVE CHARACTERISTICS 4.1 General Characteristics 4.1.1 The transformer shall be resistant to corrosion resulting from installation in a petrochemical industrial environment, and shall be suitable for the other environmental characteristics specified on the Data Sheet of standard PETROBRAS N-1559. The anti-corrosive treatment to which the transformer shall be subjected shall present final results at least equivalent to those specified by standard PETROBRAS N-1735. 4.1.2 The final finish color shall be light gray (code 0065) according to standard PETROBRAS N-1219. 4.1.3 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, the three-phase transformer with primary winding connected in a delta configuration and secondary winding connected in a wye configuration shall have an angular displacement of 30°, with the wye winding voltage being delayed in relation to the voltage of the other winding (Dyn1). 4.1.4 The transformer shall be suitable for operation with natural cooling, and be capable of withstanding additional loads through the introduction of forced cooling, as specified in the standards indicated in Chapter 2 of this Standard. In case an additional power percentage, with forced cooling, exceeding the standardized value is specified on the Data Sheet of standard PETROBRAS N-1559, the transformer shall withstand it without detriment to its service life. 4.1.5 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, the transformer shall have on the high voltage winding at least 4 taps, besides the main one, corresponding to ± 2 x 2.5 %, so as to allow the rated power to be achieved. 4.1.6 In case the number or range of taps specified on the Data Sheet of standard PETROBRAS N-1559 exceeds the one indicated in item 4.1.5 of this Standard, it shall be possible to achieve the rated power on any of the specified taps. 4.1.7 Transformers having a load current with a high harmonic content require special care with regard to the determination of their rated power and constructive characteristics, and the recommendations contained in standard IEEE Std C57.110 or another equivalent standard shall be followed, provided PETROBRAS agrees with its use. Note: In accordance with standard ABNT NBR 5356, non-sinusoidal load currents with a

harmonic current factor exceeding 0.05 pu are considered special working conditions and may require special care with regard to construction and/or determination of rated values.









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4.2 Characteristics of Insulating Oil 4.2.1 For all transformers immersed in insulating mineral oil, the oil shall be classified as type A insulating mineral oil and shall fall under the specifications of DNC technical regulation No. 03/94, DNC administrative rule (“portaria”) No. 46 or the rule in force. 4.2.2 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, the mineral oil used shall be 1)LUBRAX Industrial AV-58, 2)LUBRAX Industrial AV-58-IN or a similar oil. In case the insulating mineral oil is not one of those mentioned earlier, the manufacturer shall provide the trade name of the insulating oil offered, as well as its physical and chemical characteristics. 4.2.3 If requested on the Data Sheet of standard PETROBRAS N-1559, the oil used for filling shall be supplied in separate containers containing inert gas under pressure for transportation. 4.3 Bushing Protection Boxes 4.3.1 If requested on the Data Sheet of standard PETROBRAS N-1559, protection boxes of bushings of primary, secondary or both types of windings shall be protected against moisture penetration, water splashes, dust, insects and other elements that may adversely affect the electrical components found therein. The minimum degree of protection shall be IP 54, in accordance with standard ABNT NBR 6146. 4.3.2 The seals of boxes and other covers of the transformer shall be made of gaskets of elastomers resistant to the insulating liquid, to attack by products and vapors typically found at the installation site and to exposure to sunlight. Such packing shall not be deformed due to use or during removal of the covers for access to internal parts. 4.3.3 The protection boxes of primary and secondary winding bushings shall have flanged closing covers, which are to be fitted with hinges so that they can be opened through rotation on the vertical axis. 4.3.4 In case the Data Sheet of standard PETROBRAS N-1559 indicates that the transformer shall be connected to the busbar duct, the flange of the respective protection box of the bushings shall have compatible dimensions and holes, with provision being made for its interconnection to the aforesaid duct. The hinges referred to in item 4.3.3 of this Standard shall not be used in this case.

1) LUBRAX Industrial AV-58 is the trade name of a type of naphthenic insulating oil. This information is given to facilitate the use of this Standard by users and shall not be construed as a recommendation of the aforementioned product on the part of PETROBRAS. An equivalent product may be used provided it leads to the same results. 2) LUBRAX Industrial AV-58-IN is the trade name of a type of naphthenic insulating oil containing an oxidation inhibitor. This information is given to facilitate the use of this Standard by users and shall not be construed as a recommendation of the aforementioned product on the part of PETROBRAS. An equivalent product may be used provided it leads to the same results.






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4.3.5 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, the protection box corresponding to the grounded side of the transformer shall have a 40 mm (1 1/2”) NPT coupling, in accordance with standard ANSI/ASME B 1.20.1, welded to the bottom part of the box, intended for the passage of the system’s grounding cable. In case there is a wye connection, the coupling shall be positioned beneath the neutral bushing. 4.3.6 Specific Requirements for Protection Boxes with Cable Inlet The requirements described in items 4.3.6.1 to 4.3.6.7 are applicable to the protection boxes of bushings in those cases in which the primary or secondary side or both sides of the transformer are interconnected to the electrical system by means of cables. 4.3.6.1 Whenever the Data Sheet of standard PETROBRAS N-1559 specifies that a particular side of the transformer shall be interconnected to the electrical system by means of cables and that side has an operating voltage exceeding 1 000 V, the respective protection box of the bushings shall have sufficient space for the installation of potheads or terminations for the cables. Supports and internal attachment elements occasionally needed for supporting cables shall be supplied by the transformer manufacturer. A connector for grounding the shields of the power cables shall also be provided. Such connector shall be located inside the protection box of bushings. 4.3.6.2 If specified on the Data Sheet of standard PETROBRAS N-1559, cable potheads or terminations shall be supplied by the transformer manufacturer. Such accessories shall be suitable for the type and nominal cross-section of the cables indicated on the Data Sheet. 4.3.6.3 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, power cables shall enter the protection box in one of the following manners, as explicitly indicated on the Data Sheet:

a) coupling (s) welded to a removable flange, bolted to the protection box, intended for connection of the rigid conduit (as per standard ABNT NBR 5597), flexible conduit or cable gland; the aforementioned coupling (s) shall have an NPT thread as per standard ANSI/ASME B 1.20.1;

b) split pipe, referred to as half pipe, with suitable dimensions, used to facilitate the handling of cables during the construction of potheads or terminations.

4.3.6.4 The half-pipe or coupling referred to in item 4.3.6.3 of this Standard shall be connected to the protection box of the transformer bushings through a removable flanged plate allowing removal of the transformer without the need to dismantle potheads or terminations. 4.3.6.5 Where applicable, the quantity and nominal diameter of the half pipe or coupling (s) are indicated on the Data Sheet of standard PETROBRAS N-1559. Unless otherwise specified, power cables shall enter the protection box of the bushings through the bottom part of the box. 4.3.6.6 When the Data Sheet of standard PETROBRAS N-1559 specifies the use of half pipe, it shall be installed as shown in FIGURES 1 and 2 for three-pole or single-pole cables, respectively.








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4.3.6.7 The minimum degree of protection of the half pipe shall be IP 54 or the same as that of the protection box, with the most rigid one prevailing. 4.4 Accessories 4.4.1 All accessories mounted on the transformer, such as indicating instruments with contacts, sensors, relays, current transformers, etc. shall have their respective control cables connected to a centralized terminal box located at an accessible position. At least 2 couplings 40 mm (1 1/2”) NPT shall be provided, in accordance with standard ANSI/ASME B 1.20.1, welded to the bottom part of the aforesaid box. 4.4.2 Whenever there is incompatibility between different types of signals conducted by the control cables, which may lead to noise generation, provision shall be made for more than one centralized terminal block box, where compatible signals shall be grouped together. Alternatively, a single box may be used, provided provision is made for separating and shielding elements, as well as suitable distances within the box so that there is no interference between circuits. 4.4.3 The minimum degree of protection of the terminal box and accessories supplied with the transformer shall be IP 54, in accordance with standard ABNT NBR 6146. Sealing elements shall follow the provisions in item 4.3.2 of this Standard. 4.4.4 Cables for interconnections between the transformer accessories and the centralized terminal block shall be protected against mechanical damages by means of rigid or flexible metallic conduits. 4.4.5 The terminals or bushings of the primary or secondary of the transformer shall be supplied with connectors, bolts, nuts and washers suitable for connection to the cables or busbars indicated on the Data Sheet of standard PETROBRAS N-1559. Where a busbar duct connection is specified, suitable terminals for that purpose shall be supplied, and PETROBRAS shall furnish the drawings of the ducts for the necessary adjustments to be made. 4.4.6 When provision is made on the Data Sheet of standard PETROBRAS N-1559 for forced cooling only, the transformer manufacturer shall provide hardware for attachment of motor-fan assemblies. The data requested on the Data Sheet referring to motors and fans shall be fully filled in, even if such equipment is not supplied together with the transformer. Note: In this case, the transformer shall be built to allow the future installation of forced

cooling without the need for welds or removal of the transformer from its installation point. Support hardware of the motor-fans and accessories shall be attached by means of bolts. The spaces occupied by the additional equipment shall be indicated on the manufacturer’s drawings so that provision can be made for a clear area at the installation site of the transformer.




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4.4.7 When an oil temperature gauge is specified on the Data Sheet of standard PETROBRAS N-1559, the gauge shall have a graduation from 0 °C to 120 °C and shall have a maximum temperature indicating device. There shall be at least two reversible contacts capable of being separately adjusted in the minimum range of 55 °C to 110 °C. 4.4.8 When a winding temperature indicator is specified on the Data Sheet of standard PETROBRAS N-1559, it shall have reversible contacts for control and protection capable of being separately adjusted in the minimum range of 55 °C to 120 °C. 4.4.9 When an external oil level gauge is specified on the Data Sheet of standard PETROBRAS N-1559, the gauge shall be of the magnetic indicating type, containing references for the minimum and maximum oil levels and at 25 °C. It shall have, regardless of the transformer power, at least one reversible contact adjusted to operate when the oil reaches its minimum value. 4.4.10 When a current transformer(s) is(are) specified on the Data Sheet of standard PETROBRAS N-1559, the transformers shall be of the bushing type and the terminals of the respective secondary(ies) shall be interconnected to the terminal box specified in item 4.4.1 of this Standard. If a current transformer is requested for the neutral, it shall be of the window or bushing type and its connection terminals shall also be connected to the aforesaid terminal box. The technical characteristics of the current transformers supplied shall be indicated on the Data Sheet. 4.4.11 When protection fuses on the primary side of the transformer are specified on the Data Sheet of standard PETROBRAS N-1559, these shall be installed within the respective protection box of the bushings and shall have reversible auxiliary contacts for remote alarm in case the fuse burns. The internal arrangement of the box and fuses shall allow easy removal. Fuses shall be of the “current limiting” type ad shall have test certificates issued by an official laboratory (CEPEL, “UL - Underwriter Laboratories”, etc.). 4.4.12 Unless otherwise specified on the Data Sheet of standard PETROBRAS N-1559, electrical contacts of accessories intended for alarm, signaling or disconnection shall be of the reversible type. 4.4.13 All indicating instruments installed in the transformer shall be assembled at a clearly visible and easily accessible location so as to allow a proper reading. 4.4.14 When a no load tap changer is requested on the Data Sheet of standard PETROBRAS N-1559, it shall be externally operable with the operator at floor level. The tap changer shall have external position indication and means allowing it to be locked at any position with the use of a padlock. 4.4.15 When an on-load tap changer is requested on the Data Sheet of standard PETROBRAS N-1559, it shall comply with the requirements contained in standards ABNT NBR 5356 and NBR 8667, as well as with the specifications contained in the documentation issued for the purchase of the transformer.










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4.4.16 When a pressure relief device is requested on the Data Sheet of standard PETROBRAS N-1559, this device shall be of the type which automatically recovers its original operating condition through springs, after there has been an internal overpressure in the transformers, instead of devices designed to break. Provision shall be made for at least an auxiliary contact to indicate the operation of the pressure relief device. 4.4.17 Provision shall be made for one or more connectors for grounding the metallic parts of the transformer. The connector shall be located near the bottom of the transformer and shall be suitable for bare copper cable, with the nominal cross-section defined on the Data Sheet of standard PETROBRAS N-1559. 4.4.18 Any point of connection made through a threaded inlet for conduit shall have an NPT thread as per standard ANSI/ASME B 1.20.1. 4.4.19 When cable glands for single-pole cables are requested on the Data Sheet of standard PETROBRAS N-1559, such glands shall comply with standard ABNT NBR 10861 and shall be made of non-magnetic material. The plate on which the set of cable glands belonging to the same circuit of single-pole cables is to be mounted shall also be made of non-magnetic material. 4.4.20 The identification plate of the transformer shall be made of corrosion-resistant material, in AISI 316 stainless steel, containing, besides the information required in standard ABNT NBR 5356, the following data:

a) PETRÓLEO BRASILEIRO S.A - PETROBRAS; b) name of department; c) PETROBRAS number for transformer identification; d) Material Requisition (RM) number; e) number of Material Purchase Order (“Pedido de Compra de Material” - PCM); f) number of Material Supply Authorization (“Autorização de Fornecimento de

Material” - AFM); g) as an alternative to paragraphs d) and f), the contract number, in the case of

purchases included in Turn Key, Lump Sum contracts, etc.). Note: The data contained in paragraphs a) through g) may be included in the

identification plate or in an additional plate made of the same material as the main plate.

5 INSPECTION 5.1 Unless otherwise specified by PETROBRAS, the fabrication inspection shall be performed by a professional duly qualified, in the electricity modality, as specified in standard PETROBRAS N-2033. 5.2 The inspection shall check at least the points indicated in items 5.2.1 to 5.2.8 below. 5.2.1 As to the status of the documentation presented by the manufacturer for inspection, as indicated in item 6.2. The documentation shall be certified.






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5.2.2 Compliance of the manufactured equipment with the technical documentation referring to this supply, duly certified by the manufacturer and approved by the design department of PETROBRAS (Data Sheet of standard PETROBRAS N-1559, specifications including this Standard, drawings, manuals and catalogs of accessories). 5.2.3 The gauging/calibration certificates of the instruments to be used in the tests. 5.2.4 The visual characteristics of the equipment, such as bushings, accessories and painted parts. 5.2.5 Painting tests (adhesion and thickness). 5.2.6 The dimensional characteristics of the equipment, such as internal spaces of terminal box (es) and bushing protection boxes as well as their components (insulators, terminal connectors, grounding connectors, connection terminals, current transformers, half pipes, couplings for entry of conduits, etc.). 5.2.7 The routine tests prescribed in the technical standards adopted in this supply. 5.2.8 The type and special tests established in the technical standards adopted in this supply, if specified on the Data Sheet of standard PETROBRAS N-1559. 6 TECHNICAL DOCUMENTATION 6.1 With Proposal This item covers the technical documentation to be attached to the proposal. Such documents shall contain at least the following information:

a) preliminary drawing, containing the major dimensions of the transformer and its accessories;

b) approximate mass of the complete transformer; c) data Sheet of standard PETROBRAS N-1559 duly completed and authenticated

by the supplier, as per item 3.4 of this Standard; d) transformer initial magnetization current value versus decay time curve; e) curve of primary protection fuses of transformer, if requested on the Data Sheet

of standard PETROBRAS N-1559; f) catalogs containing all information and technical characteristics of the

protection, command and signaling elements, as well as all accessories requested on the Data Sheet of standard PETROBRAS N-1559;

g) trademark of the insulating oil offered, as well as its physical and chemical characteristics and reference standard;

h) list of technical standards applicable to this supply which complement the list of Chapter 2 of this Standard;

i) paint system adopted for the transformer and accessories, as mentioned in item 4.1.1 of this Standard;

j) list of necessary spare parts according to the criterion defined in the Material Requisition (RM), with their respective unit costs;







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k) list of type and special tests, when requested on the Data Sheet of standard

PETROBRAS N-1559, with their respective individual prices indicated separately.

6.2 After the Material Supply Authorization 6.2.1 This item covers the technical documentation to be submitted for approval after the transformer is actually purchased. Note: The documents shall consider the information contained in the proposal, in

addition to the technical clarifications provided by the manufacturer, in the technical report.

6.2.2 The documents to be presented shall contain at least the following information:

a) layout drawing of transformer, containing the general dimensions, views, constructive details and list of components;

b) partial masses and mass of the complete transformer; c) location and detail of the protection boxes of bushings; d) location, specifications and drawings of terminal bushings and their connectors; e) location and installation details of accessories and auxiliary equipment; f) location and details of the terminal boxes, with internal arrangement of

terminals; g) location and details of all accessories for entry of cables, such as half pipes,

threaded couplings, etc.; h) location and dimensional and constructive details of flanges; i) location and dimensions of housing grounding terminals; j) location and details of systems used for support, hoisting and locomotion of

transformer; k) control and interconnection diagrams; l) diagrammatic and identification plates; m) transformer initial magnetization current curve; n) curves showing time x current and limitation of protection fuses if requested on

the Data Sheet of standard PETROBRAS N-1559; o) dimensional drawings, information sheet and saturation curves of current

transformers, if requested on the Data Sheet of standard PETROBRAS N-1559; p) dimensional drawings and technical characteristics of lightning arresters, if

requested on the Data Sheet of standard PETROBRAS N-1559; q) complete documentation referring to the on-load automatic tap changer and its

accessories, in case such device is required on the Data Sheet of standard PETROBRAS N-1559;

r) complete documentation referring to the other accessories of the transformer, including dimensional drawings, technical specifications, descriptions of operation, instructions for adjustments, electrical and interconnection diagrams, etc.;

s) Data Sheet of standard PETROBRAS N-1559, with all items duly filled in, as per item 3.4 of this Standard, containing the revisions resulting from the determinations of the technical report.








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6.3 Assembly, Operation and Maintenance Manual Upon final approval of all technical documents specified in the preceding item, the assembly, operation and maintenance manuals of the transformer shall be furnished, containing at least the following information:

a) Data Sheet of standard PETROBRAS N-1559, duly completed, containing the transformer data corresponding to the “as built” status;

b) all certified documents supplied and listed in item 6.2 of this Standard, as well as other supplementary documents deemed necessary by the manufacturer;

c) procedures for storage and conditioning of the transformer, accessories supplied separately, as well as spare parts;

d) assembly procedures; e) operation procedures; f) procedures for preventive and corrective maintenance of the transformer, as

well as of all requested accessories; g) detailed technical catalogs containing technical information on all supplied

accessories; h) results of all tests to which the transformer was subjected during and after the

manufacturing phase.

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IR 1/1

INDEX OF REVISIONS

REV. A, B, C and D

There is no Index of Revisions.

REV. E

Affected Parts Description of Modification

1 Revised

1.2 Included

2 Revised

3.1 to 3.5 Revised

3.6 Excluded

4.1 Revised

4.1.1 to 4.1.7 Included

4.2 Revised


4.2.4 Excluded

4.3 Revised


4.3.6.1 to 4.3.6.7 Included

FIGURE 1 Revised

FIGURE 2 Revised

4.4 Revised


4.5 to 4.17 Excluded

5.1 and 5.2 Revised


5.3 Excluded

6.1 and 6.2 Revised

6.2.1 and 6.2.2 Revised

6.3 Included

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