SPECIFICATION SR-138

THE ISRAEL ELECTRIC CORPORATION LTD. PLANNING DEVELOPMENT & TECHNOLOGY DIVISION

RELIABILITY & H.V. EQUIPMENT DEPARTMENT

SEPTEMBER 2015

SR-138 SR-138

SPECIFICATION

SR-138 FOR

24 kV , 250 and 450 A for 1 hour

EARTHING TRANSFORMER

THE ISRAEL ELECTRIC CORPORATION LTD. PLANNING DEVELOPMENT & TECHNOLOGY DIVISION

RELIABILITY & H.V. EQUIPMENT DEPARTMENT

DATE SIGNATURE

PREPARED

T. MADAR

12.08.2015

M CHEAUSU

CHECKED DR. H. BEN HAIM 25.08.2015

APPROVED D. AMDUR 06.09.2015

SEPTEMBER 2015

SPECIFICATION

SR-138 FOR

24 kV , 250 and 450 A for 1 hour


ANNEXURE “B” AND SUMMARY OF DATA SPECIFICATION SR-138

I

This document contains proprietary information of Israel Electric Corporation (IECo.) and is to be used for the Project and for the sole purpose for which it is furnished. The recipient or anyone on its behalf shall not be entitled to use the document, or any part thereof, for any other purpose without the prior written approval of IECo. The recipient shall keep this document in strict confidence and shall not transfer, disclose or divulge it to any other person without the prior written approval of IECo. IECo. Is the sole owner of all intellectual property rights associated with this document and any future work product thereof.


II

TABLE OF CONTENTS

1. PURCHASER: .................................................................................................... 1

2. NAME OF PROJECT .......................................................................................... 1

3. SCOPE OF WORK ............................................................................................. 1

3.1. SCOPE OF SUPPLY ................................................................................... 1

3.2. TERMS AND CONDITIONS FOR TRANSFORMER PURCHASING. ......... 2

4. STANDARDS ...................................................................................................... 2

5. DEFINITIONS ..................................................................................................... 4

6. INTERCHANGEABILITY .................................................................................... 5

7. QUALITY MANAGEMENT SYSTEM AND QUALITY CONTROL ....................... 5

8. PROGRESS REPORTS ..................................................................................... 6

9. SYSTEM DATA AND SPECIAL REQUIREMENTS FOR ENVIRONMENTAL PROTECTION ................................................................................................... 6

10. EVALUATION OF BIDDER’S TECHNICAL PROPOSAL .................................. 8

11. MANUFACTURER .......................................................................................... 10

12. SERVICE CONDITIONS ................................................................................. 11

12.1. CLIMATIC CONDITIONS ........................................................................ 11

12.2. ENVIRONMENTAL CONDITIONS .......................................................... 11

12.3. SEISMICITY ON THE SITE AND SEISMIC QUALIFICATION LEVEL .... 12

12.4. ELECTROMAGNETIC ENVIRONMENT ................................................. 12

12.5. ACCELERATION DURING TRANSPORTATION .................................... 13

12.6. OTHER REQUIREMENTS ...................................................................... 13

13. ELECTRICAL RATING DATA ......................................................................... 14

14. TESTS - GENERAL ........................................................................................ 22

14.1. TESTS - GENERAL ................................................................................. 22

14.2. ROUTINE TESTS .................................................................................... 23

14.3. TYPE TESTS ........................................................................................... 29

14.4. SPECIAL TESTS ..................................................................................... 30

14.5. EQUIPMENT QUALIFICATION TO PROVE SEISMIC WITHSTAND ...... 32

14.6. TESTS AFTER ERECTION ON SITE ...................................................... 34


III

15. DESIGN AND CONSTRUCTION .................................................................... 35

15.1. MAGNETIC CIRCUIT .............................................................................. 35

15.2. WINDING ................................................................................................. 36

15.3. EARTHING TRANSFORMER TANK ....................................................... 38

15.4. SKIDS ...................................................................................................... 41

15.5. GASKETS ................................................................................................ 42

15.6. OIL AND OIL PRESERVATION SYSTEM ............................................... 42

15.7. COOLING SYSTEM ................................................................................ 44

15.8. CONTROL BOX ....................................................................................... 46

15.9. WIRING ................................................................................................... 47

15.10. ACCESSORIES ..................................................................................... 48

15.11. BUSHINGS ............................................................................................ 53

15.12. BUSHING CT’S ..................................................................................... 61

15.13. EARTHING ............................................................................................ 63

15.14. NAMEPLATE ......................................................................................... 64

15.15. DIMENSIONS AND WEIGHTS .............................................................. 65

16. DELIVERY, PACKING, SHIPMENT AND STORAGE ..................................... 66

17. COMMISSIONING .......................................................................................... 69

18. QUALITY CONTROL, RELIABILITY, MAINTENANCE AND INSPECTION ... 72

18.1. QUALITY CONTROL ............................................................................... 72

18.2. RELIABILITY, MAINTAINABILITY AND SAFETY (RMS) ..................... 72

18.3. MAINTENANCE AND INSPECTION ....................................................... 73

19. TECHNICAL DOCUMENTS TO ACCOMPANY THE PROPOSAL ................ 76

20. TECHNICAL DOCUMENTS AFTER NOTIFICATION OF AWARD ................ 81

21. COMMENTS BY MANUFACTURER ON ANNEXURE “B” AND SUMMARY OF DATA ............................................................................................................... 87

22. FOLLOW-ON ENGINEERING AND SUPPORT AFTER PURCHASE ............ 88

23. DEVIATIONS FROM REQUIREMENTS ......................................................... 89

24. CONFORMITY WITH PROPOSAL DOCUMENTS ......................................... 90


IV

DRAWINGS:

BUSHINGS ........................................................................................................ 145

BUSHINGS FLANGE ......................................................................................... 149

BUSHING LOCATION AND ARRANGEMENT .................................................. 150


V

APPENDICES:

No. 1 : TESTS AFTER ERECTION ON SITE

No. 2 : SPECIFICATION NO. 50/2013 FOR MINERAL INSULATING OIL

SUPPLIED FOR/WITHIN NEW ELECTRICAL EQUIPMENT

No. 3 : SPECIFICATION EPD-A.03 FOR CONTROL CUBICLES –

ELECTRICAL WIRING REQUIREMENTS

No. 4 : RELIABILITY, MAINTAINABILITY, SAFETY (RMS) AND

UNRELIABILITY DEMONSTRATION PROCEDURE

No. 5 : SPECIFICATION 2009-217-141707 - TRANSFORMER PAINTING

No. 6 : REPORT OF SOUND PRESSURE/INTENSITY LEVEL

MEASUREMENT AND SOUND POWER CALCULATION

No. 7 : SPECIFICATION NO. 804 FOR SELF INDICATING ORANGE-WHITE

SILICA GEL COBALT FREE FOR USE AS DESICCANT IN

TRANSFORMER AIR DEHYDRATORS

No. 8 : CONTRACTOR’S TECHNICAL PERFORMANCE GUARANTEES

No. 9 : PROCEDURE FOR HANDLING NON-CONFORMANCE

No. 10 : DESIGN REVIEW FOR TRANSFORMER ENGINEERING

No. 11 : SPECIFICATION Q - APP – 02: QUALITY REQUIREMENTS


B - 1

SPECIFICATION

FOR

24 kV, 250 and 450 A for 1 hour


1. PURCHASER:

THE ISRAEL ELECTRIC CORPORATION LIMITED (I.E.Co.)

2. NAME OF PROJECT

EARTHING TRANSFORMERS FOR 24 kV SYSTEM

3. SCOPE OF WORK

Design, develop, manufacture, test, preserve, export pack for overseas shipment and furnish the following Earthing Transformers in accordance with this Specification as detailed hereunder.

3.1. SCOPE OF SUPPLY

Manufacturer shall supply the following items:

3.1.1. ITEM 1A: 24 kV, 250 A for 1 hour, three phases, single winding, oil immersed ONAN cooling, EARTHING TRANSFORMER for indoor and outdoor installation.

3.1.2. ITEM 1B: 24 kV, 450 A for 1 hour, three phases, single winding, oil immersed ONAN cooling, EARTHING TRANSFORMER for indoor and outdoor installation.

3.1.3. ITEM 2: RECOMMENDED SPECIAL MAINTENANCE TOOLS: Contractor is required to submit a detailed list of recommended test equipment (including hardware and software for setting) and maintenance tools including manufacturer catalog numbers.

3.1.4. ITEM 3: RECOMMENDED SPARE PARTS: Contractor is required to submit a detailed list of recommended Spare Parts and Renewal Materials including manufacturer catalog numbers.

3.1.5. ITEM 4: TRAINING COURSE (OPTIONAL): Training course which to be held in IECo facilities in order to attain satisfactorily IECo's staff proficiency at maintenance actions. The training course shall include schedule and issues.

3.1.6. ITEM 5: ERECTION AND COMMISSIONING SUPERVISION (OPTIONAL): Erection and Commissioning Supervision to be held in IECo facilities. The duration of the Commissioning Program shall attain satisfactorily IECo staff, proficiency at erection and commissioning actions.


B - 2

The Earthing Transformers shall be delivered factory tested according to the requirements in paragraph Tests (clause ‎14) and equipped with all accessories, as specified under paragraph "Design and Construction" (Clause ‎15).

3.2. TERMS AND CONDITIONS FOR TRANSFORMER PURCHASING.

3.2.1 All commercial terms and conditions, such as “Special conditions", "flexible framework conditions" and quantities to be supplied, are detailed in the relevant Tender's commercial annexures.

4. STANDARDS

Unless otherwise specified, all equipment shall be designed, constructed and tested in accordance with the requirements of the latest relevant published Recommendations of the International Electrotechnical Commission (IEC), as amended up to date. All aspects, tests, etc. not covered by IEC Recommendations shall be executed according to the latest published issue of official or otherwise approved standards of Manufacturer's country. Contractor shall state all relevant standards. In case the requirements in this Specification differ from those in IEC Publications in any respect, the equipment shall conform to requirements in this Specification concerning that Item. If after issuing this specification some of the mentioned standards are updated, amended, withdrawn or replaced with another ones, the impact of those changes on the Specification and on the final product will be subjected to agreements between the Contractor and the Purchaser. The following standards are applicable in the relevant parts to the individual components of the earthing transformer:

API 650/2011 Welded Steel Tanks for Oil Storage

ASTM A 153/2009 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A 876/2012 Standard Specification for Flat-Rolled, Grain-Oriented, Silicon-Iron, Electrical Steel, Fully Processed Types

ASTM B 579-73 /2009 Standard Specification for Electrodeposited Coatings of Tin-Lead Alloy (Solder Plate)

ASTM B 580-79/2009 Standard Specification for Anodic Oxide Coatings on Aluminum

ASTM D 520 – 00/2011 Standard Specification for Zinc Dust Pigment

ASTM F 1135/2004 Standard Specification for Cadmium or Zinc Chromate Organic Corrosion Protective Coating Fasteners

BS EN 10025:2004 Hot rolled products of structural steels

DIN 16203/2010 Thermometer

DIN EN ISO 2409/2007 Paints and varnishes - Cross-cut test


B - 3

DIN EN ISO 12944/1998 Paints and varnishes - Corrosion protection of steel structures by protective paint systems: Classification of environments Cross-cut test

DS/EN 50216-4/2015 Power transformer and reactor fittings – PART 4: Basic accessories (earthing terminal, drain and filling devices, thermometer pocket, wheel assembly)

IEC 60076-1/2011 Power transformers - Part 1: General

IEC 60076-2/2011 Power transformers - Part 2: Temperature rise for liquid – immersed Transformers

IEC 60076-3/2013 Power transformers - Part 3: Insulation levels, dielectric tests and external clearances in air

IEC 60076-4/2002 Power transformers - Part 4: Guide to the lightning impulse and switching impulse testing - Power transformers and reactors

IEC 60076-5/2006 Power transformers - Part 5: Ability to withstand short circuit

IEC 60076-6/2007 Power Transformers-Part 6: Reactors

IEC 60076-7/2005 Power transformers - Part 7: Loading guide for oil-immersed power transformers

IEC 60076-10/2005 Power transformers - Part 10: Determination of sound levels

IEC 60085/2007 Electrical insulation – Thermal evaluation designation

IEC 60137/2008 Insulating bushings for alternating voltages above 1000 V

IEC 60255-26 ed. 3.0/2013

Measuring relays and protection equipment

IEC 60296/2012 Specification for unused mineral insulating oils for transformers and switchgear

IEC 60317/2013 Specifications for particular types of winding wires - Enamelled round and rectangular copper wire

IEC 60404-8-7/2008 Specifications for individual materials - Cold-rolled grain-oriented electrical steel strip and sheet delivered in the fully-processed state

IEC 60529/2013 Degrees of protection provided by enclosures (IP code)

IEC 60554/2001 Specification for cellulosic papers for electrical purposes

IEC 60567/2011 Oil-filled electrical equipment – Sampling of gases and of oil for analyses of free and dissolved gases - Guidance

IEC 60641/2008 Pressboard and presspaper for electrical purposes


B - 4

IEC 60721-3-4/1996 Classification of environmental conditions

IEC 60815-1/2008 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 1: Definitions, information and general principles

IEC 60815-2/2008 Selection and dimensioning of high-voltage insulators intended for use in polluted conditions - Part 2: Ceramic and glass insulators for a.c. systems

IEC 60851/2013 Winding wires-Tests methods

IEC 61083-1/2001 Instruments and software used for measurement in high-voltage impulse tests - Part 1: Requirements for instruments

IEC 61083-2/2013 Digital recorders for measurements in high-voltage impulse tests - Part 2: Evaluation of software used for the determination of the parameters of impulse waveforms

IEC 61181/2012 Impregnated insulating materials - Application of dissolved gas analysis (DGA) to factory tests on electrical equipment

IEC 61439/2014 Low-voltage switchgear and control gear assemblies

IEC 61869-2/2012 Instrument transformers - Part 2: Additional requirements for Current transformers

IEC 62155/2003 Hollow pressurized and unpressurized ceramic and glass insulators for use in electrical equipment with rated voltages greater than 1000 V

IEEE C57.109/2008 Guide for Liquid-Immersed Transformer Through-Fault-Current Duration

IEEE C57.12.90/2010 Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEEE 693/2005 Recommended Practice for Seismic Design of Substations

ISO 9001:2008 Quality management systems Requirements

ISO 14001:2004 Environmental Management Systems

ISO 14025:2006 Environmental labels and declarations -- Type III environmental declarations -- Principles and procedures

5. DEFINITIONS

For the purpose of this Specification, the definitions listed in IEC 60076-6 (IEV) and other IEC standards have been used.


B - 5

6. INTERCHANGEABILITY

All Earthing Transformer components of the same type and rating shall be respectively interchangeable both electrically and mechanically with each other, and when so interchanged shall perform their function equally well in every respect. All dismountable parts, of the same type and rating, shall be also interchangeable for all Earthing Transformer components and, when so interchanged, shall perform their function equally well in every respect.

7. QUALITY MANAGEMENT SYSTEM AND QUALITY CONTROL

7.1 The Contractor shall be responsible for assuring that his subcontractor’s Quality Assurance/Quality Control Programs, including their organizations, procedures, personnel qualification etc., are approved and are consistent with the specific requirements imposed by the Purchaser in the Specification.

7.2 Definitions:

7.2.1 Certification Body (CB) – An independent external body authorized to confirm that tended/supplier's Management System conforms with the requirements specified in the standard, by issuing a certificate. The Certification Body should be qualified to certify by an Accreditation Body.

7.2.2 Accreditation Body (AB) – An independent body, being a member of the International Accreditation Forum Multilateral Arrangement – IAF MLA, having authority to formally approve the competence of a certification body providing certification services.

7.3 The Contractor shall comply with the requirements stated in the "Procedure for handling non-conformance" attached as APPENDIX No. 9.

7.4 Quality Control. The quality control requirements shall be according to specification "Q-App-02 Rev.4" (see APPENDIX No. 11).

7.5 The selection of Contractor's subcontractors (for the contract) shall be subjected to Purchaser's approval.

7.6 The Purchaser shall have the right to audit and comment on Contractor’s Quality Assurance System regardless of whether it was previously audited by a certifying agency or any other body.


B - 6

7.7 The tender/supplier shall have a Quality Management System (QMS) having a certificate evidencing compliance with the requirements of the valid revision of ISO 9001 or any other Management System standard specifically indicating that it implements the requirements of ISO 9001 Which are valid on the date that specified for submission of the proposal.

7.8 Approval of conformance with the ISO 9001 requirements, as indicated in clause ‎7.7

above, shall be in a form of a certificate issued by a Certification Body (CB) which is a qualified by an Accreditation Body [(AB), see ‎7.2.2)].

7.9 The certificate should bare the logo of the CB and of its Accreditation Body and/or the logo of the IAF MLA.

7.10 The certificate shall be valid on the date set for submission of the proposal.

7.11 The certificate shall be valid for the scope of activities requested in the request for proposal.

7.12 The scope of activities indicated in the certificate of the QMS, shall specifically cover the scope of work required by the tender/spec. (i.e. earthing Transformer design, testing and manufacturing).

7.13 Further to the Contractor's QMS certification by any certification body, the Purchaser shall have the right to audit and comment about its QMS.

7.14 It is the Contractor's responsibility to assure that its subcontractors and suppliers QMS and scope of supply meet Purchaser's quality requirements as imposed by the Purchaser in the Specification.

8. PROGRESS REPORTS

Progress Reports shall be submitted in accordance with the relevant Tender's commercial annexures.

9. SYSTEM DATA AND SPECIAL REQUIREMENTS FOR ENVIRONMENTAL PROTECTION

9.1. The system has the following characteristics:

9.1.1 Rated system voltage (line to line) (kV) ........................ 22

9.1.2 Highest system voltage (line to line) (kV) ...................... 24

9.1.3 Symmetrical short-circuit current (kA r.m.s.) ................. 12

9.1.4 System neutral .............................................................. solidly earthed through Earthing Transformer /or

earthed through Arc Suppression Coil/

resistor connected to earthing transformer


B - 7

9.1.5 Fault duration ................................................................ 2 sec. / 1 h for single-phase fault

9.1.6 Earth fault factor:

9.1.6.1 For 2 sec. ............................................................... 1.85

9.1.6.2 For 1 h ................................................................... 1.8

9.1.7 Rated frequency ( Hz ) .................................................. 50

9.1.8 Range of frequency variation (Hz) ................................ 50.5-47.2

9.1.9 Line auto re-closing policy ............................................ Three phase two shots

9.1.10 For calculation of the short circuit current at Earthing Transformer terminals the short circuit power of the 24 kV systems shall be assumed to be 500 MVA.

9.1.11 The Earthing Transformers are to be connected to the 24 kV busbars of substation fed by 50 MVA (vector group YNd11, Usc=20%) or 75 MVA (vector group YNd11, Usc=15%), 161/24 kV power transformers which are delta connected on 24 kV side. Earthing Transformers will provide an artificial neutral point for:

9.1.11.1 Direct earthing.

9.1.11.2 Earthing through an Arc Suppression Coil (Petersen coil).

9.2. Special Requirements for Environmental Protection:

9.2.1. Due to the severe environmental conditions to which the equipment may be subjected during its service life, the following requirements for its protection form an integral part of the Specification and are in addition to the standard design and protective measures which the manufacturer would normally invoke for these conditions:

9.2.2. Bolts, nuts and washers greater than 1/2" shall be hot dip galvanized according to ASTM-A-153/2009 or equivalent. Hot dipped as well as electrolytically galvanized nuts, bolts and washers shall be passivated according to ASTM F 1135/2004 Grade 3 Olive Drab color, or equivalent standard and finish.

9.2.3. Components such as springs, pins and those for which a tight maintained dimensional tolerance is required shall be made of stainless steel. The preferred stainless steel is an austenitic grade; however, if physical requirements are overriding, other stainless steel grades will be acceptable. Austenitic grades will be subject to a solution quench. Prior to being placed into service all stainless steel components will be cleaned and passivated.

9.2.4. All aluminum components shall be fabricated from grades of aluminum that show resistance to salt spray and moist conditions; e.g., Al-Mg base alloys. Al-Cu alloys are not acceptable. After fabrication, all aluminum components shall be anodized to ASTM B 580-1979 (Reproved 2009) Type A, or equivalent.


B - 8

9.2.5. All copper or copper alloy components shall be electrolytically tinned to ASTM B 579/1973 (Reproved 2009) Service Condition SC4 or equivalent.

9.2.6. Components such as sleeves or bushings which may be fabricated having an inner face of one metal and a supporting outer face of another, or conductors which are used with connectors of a dissimilar metal are to have their exposed interfaces protected against moisture.

9.2.7. All bearings shall be sealed type. The seal shall be guaranteed to be protective against sand, salt spray and moisture for a minimum period of 10 years.

9.2.8. All grease packed bearing shall be shipped lubricated.

9.2.9. All exposed metal surfaces of the Earthing Transformers shall be coated

according to APPENDIX No. 5.

9.2.10. Metal spraying and painting may be used for protecting metal surfaces only after approval by Purchaser.

9.2.11. The paint's system shall be compatible to Corrosive Environment "C5-M very high (marin)", according to DIN EN ISO 12944-2, item 5, classification of Environmental Conditions.

9.2.12. All Earthing Transformers components shall successfully withstand in operation the climatic and environmental conditions as defined. Under clause ‎12.

9.2.13. Manufacturer is requested to describe or indicate deviations (see Clause ‎23, Annexure “B”) from above requirements. In case no deviations are mentioned it will be understood that Manufacturer’s offer entirely complies with the above mentioned requirements.

10. EVALUATION OF BIDDER’S TECHNICAL PROPOSAL

10.1. In order to be evaluated, the Bidder Proposal containing the Specification “Word” format file filled in with Manufacturer answers as well as all documents intended to complete the Bid shall be submitted at the Proposal submission term, in two different formats, as required in the Tender/inquiry documents:

10.1.1. One hard copy.

10.1.2. One electronic media copy.

10.2. The Bidder is requested to fill in the offered data in the Specification “Word” format file published by I.E.Co. (Israel Electric Corporation) Supply & Stores Division. The answers shall be inserted in the questionnaire tables in the free columns of the right hand side. A definite answer (data / yes or no) or appropriate comments shall be given to all other requirements.

10.3. IECo. keeps the right to demand any clarification and/or technical documentation to demonstrate any answer of your offer.


B - 9

10.4. The Bidder's proposal will be disqualified, whether his answer on any clause marked by the symbol ©, will not comply with the IECo. Specification requirement. Furthermore IECo. (Israel Electric Corporation) keeps the right to disqualify the Bidder's proposal which will not meet other technical requirements of this specification.

10.5. Whether the Bidder has to comment/ to clarify/ to adapt any one of the clauses he has to do it either on the right free columns or in the dedicated "comments or deviation from requirements" chapters ‎21 and ‎23. Any modification of the clause may lead to Bidder's proposal disqualification.

10.6. In the relevant clauses, in which the "equivalent" equipment is offered instead of the required figure, then the offered "equivalent" equipment:

Shall be exactly indicated (manufacturer, type …),

Needs to be approved by IECo,

Will be evaluated by comparison to the mentioned requirement using the information data provided by the Bidder.

10.7. Bidder’s offered data and parameters as well as definite answers or comments will be evaluated from technical point of view according to their compliance level. Every evaluated answer will be multiplied by its technical weight by using expert evaluation computer program.

10.8. The technical weight of every subclause is stated in the Evaluation Criteria document. The Evaluation criteria document will be attached to the tender documents, and it is identical for every Bidder.

10.9. The computer program uses a pair-wise comparison technique based on statistical analysis to evaluate criteria importance and to rank proposals from technical point of view.


B - 10

11. MANUFACTURER

Name of Contractor:

REQUIRED OFFERED

11.1. Contractor’s name and address ...................................................

11.2. Manufacture’s name and address (if it is different from Contractor’s) .........................................................................................

11.3. List of all subcontractors or sub suppliers, including name, address and status of their QMS (Quality Management System) certification (e.g. ISO 9001:2008, AS 9100, TL 90001, ISO/TS 16949, etc.) ...........................................................................................

11.4. The offered types of Earthing Transformers shall be a proven design (not a prototype) with high experience in work (Manufacturer declaration) ...........................................................................................

11.5. Types of Earthing Transformers (denomination) for:

11.5.1. ITEM 1A – see subclause ‎3.1.1 ..............................................

11.5.2. ITEM 1B – see subclause ‎3.1.2 ...............................................

11.6. Contractor's offer number ............................................................

Manufacturer's offered data :[i1]הערהshallbe filled in against Purchaser's required values -as well as in the absence thereof under all relevant paragraphs in this free column. A definite answers (yes or no) or appropriate comments shall be given without any restriction in text length, although the cell dimension is increased and reformed.


B - 11

12. SERVICE CONDITIONS

Name of Contractor:

REQUIRED OFFERED

12.1. CLIMATIC CONDITIONS

12.1.1 8-9 month a year without rains with more than 100 nights with dew and high humidity in the air as experienced in coastal or desert areas in this country

12.1.2 Permissible Ambient air temperature:

12.1.2.1 Maximum (C) ............................................. + 50

12.1.2.2 Minimum (C) .............................................. - 5

12.1.2.3 Monthly average of the hottest month (°C) 27

12.1.2.4 Yearly average (C) ..................................... 22

12.1.3 Permissible humidity:

12.1.3.1 Low relative/absolute humidity (%/g//m3) ..... 4/0.9

12.1.3.2 High relative/absolute humidity (%/g//m3) .... 100/ 27

12.1.4 Rain intensity (mm/min) ................................... 15

12.1.5 Low/high air pressure (KPa) ............................ 84/106

12.1.5.1 Solar radiation: Heating effects of solar radiation (W/m2) ........................................................

1120

12.1.5.2 Maximum wind velocity measured 10 m above grade (bare area) at 3 sec duration (Considering a 50 years mean return period) (m/sec) ....................................................................

44

12.2. ENVIRONMENTAL CONDITIONS

12.2.1 Environmental parameters according to .......... IEC 60721-3-4

12.2.2 Severe atmospheric and industrial air pollution, dust, salt spray and sandstorms .................

12.2.3 Permissible altitude over the sea level (m) ...... 1000

Manufacturer's offered data :[i2]הערהshould be filled in against Purchaser's required values -as well as in the absence thereof under all relevant paragraphs in this free column. A definite answers (yes or no) or appropriate comments shall be given without any restriction in text length, although the cell dimension is increased and reformed.


B - 12


Name of Contractor:

REQUIRED OFFERED

12.2.4 Water from sources other than rain : spraying water and water jets with water velocity (m/sec) .......

15

12.2.5 Chemically active substances according to ..... Table IV 4C3

12.2.6 Mechanically active substances according to .. Table V 4S3

12.2.6.1 Sand (mg/m3) .............................................. 1000

12.2.6.2 Dust suspension rate (mg/m3) ..................... 15

12.2.6.3 Dust sedimentation rate (mg/m3.h) .............. 40

12.3. SEISMICITY ON THE SITE AND SEISMIC QUALIFICATION LEVEL

12.3.1 The seismic design of earthing transformers installed on his foundation shall be based on the seismic qualification requirements stated in IEEE Std. 693/2005 The required seismic qualification level for transformers shall be ....................................

Moderate level

12.4. ELECTROMAGNETIC ENVIRONMENT

12.4.1 The electronic devices delivered with the earthing transformers shall withstand an electromagnetic environment having the following maximum severity levels according to:

IEC 60255-26

12.4.1.1 Severity level for electrostatic discharge (kV) ....................................................................

4

12.4.1.2 Severity level for radio frequency interference (V/m) .....................................................

10

12.4.1.3 Severity level for electrical 1 MHz burst disturbance (kV) ........................................................

2.5

12.4.1.4 Severity level for fast transients according to (kV) ....................................................................

2


B - 13


Name of Contractor:

REQUIRED OFFERED

12.5. ACCELERATION DURING TRANSPORTATION

12.5.1 Vibration and shocks (non-stationary vibrations including shocks). The expected accelerations on the equipment transported on roads, to be considered:

12.5.1.1 Longitudinal (m/sec2) ................................ 2 g

12.5.1.2 Transversal (m/sec2) ................................ 1.2 g

12.5.1.3 Vertical (m/sec2) ....................................... 1.2 g

12.6. OTHER REQUIREMENTS

12.6.1 The earthing transformers shall be vermin proof ........................................................................

12.6.2 Specify if special measures (air ventilation) shall be taken for indoor mounting .............................


B - 14

13. ELECTRICAL RATING DATA1

Name of Contractor:

REQUIRED OFFERED

13.1 Ratings of the transformers shall be based on the ambient air temperature stated on subclause ‎12 and on the following temperature conditions ..............

13.2 Number of phases ............................................ 3

13.3 Rated frequency (Hz) ....................................... 50

13.4 Rated voltage according to .............................. (line-to-line voltage) (kV) ............................................

IEC 60076-6

scl. 10.4.1

24

13.5 Rated neutral current:

13.5.1 At rated frequency which earthing transformers shall carry continuously according to ...

(A) ...............................................................................

IEC 60076-6

scl. 10.4.4

120

13.5.2 At rated frequency which earthing transformers shall carry for 1 hour:

13.5.2.1 ITEM 1A (A) ............................................... 250

13.5.2.2 ITEM 1B (A) ............................................... 450

13.5.3 At rated frequency which earthing transformers shall carry according to ........................ for 5 seconds (short-time) for:

IEC 60076-6

scl. 10.4.5

13.5.3.1 ITEM 1A (A) ............................................... 4100

13.5.3.2 ITEM 1B (A) ............................................... 5300

13.5.4 Dynamic ability to withstand short circuit :

1 The terms used here are in general according to the Standards listed in clause ‎4

Manufacturer's offered :[i3]הערהdata should be filled in against

Purchaser's required values -as well as

in the absence thereof under all relevant paragraphs in this free

column. A definite answers (yes or

no) or appropriate comments shall be

given without any restriction in text

length, although the cell dimension is

increased and reformed.


B - 15


Name of Contractor:

REQUIRED OFFERED

13.5.4.1 For ITEM 1A (kA peak) ..............................

13.5.4.2 For ITEM 1B (kA peak) ..............................

13.6 Rated zero-sequence impedance according to

( / phase) .................................................................

IEC 60076-6

scl. 10.4.3

5.6

13.7 Tolerance on zero-sequence impedance measured at rated neutral current (%) ....................... according to ...............................................................

0 to 10

IEC 60076-6

scl. 10.10 table 2

13.7.1.1 In addition for 2 or more units of the same order the differences of the similar zero-sequence impedance between each two transformers shall not exceed (%).........................................................

10

13.8 Temperature rise (calculated temperatures shall be introduced) according to:

IEC 60076-6 scl. 10.6

13.8.1 Design ambient temperature according to ....

(C) ..........................................................................

Subclause ‎12.1.2 and

IEC 60076-7

subclause. 3.16

13.8.2 Temperature rise at rated continuous neutral current (subcl. ‎13.5.1.) according to.........................

Shall not exceed:

IEC 60076-6

scl. 10.6.1

13.8.2.1 For average winding temperature rise (measured by resistance method) (K) ......................

65

13.8.2.1.1 ITEM 1A (K) ........................................


B - 16


Name of Contractor:

REQUIRED OFFERED

13.8.2.1.2 ITEM 1B (K) ........................................

13.8.2.2 For top oil temperature rise (measured by thermometer) (K) .....................................................

60

13.8.2.2.1 ITEM 1A (K) ........................................

13.8.2.2.2 ITEM 1B (K) ........................................

13.8.2.3 For hot-spot temperature rise (K) ............. 78

13.8.2.3.1 ITEM 1A (K) ........................................

13.8.2.3.2 ITEM 1B (K) ........................................

13.8.3 Maximum permissible temperature rise at rated short-time current and temperature of the winding acc. to .........................................................

Shall not exceed:

IEC 60076-6

scl. 10.6.2

13.8.3.1 After 1 hour loading at rated neutral current (subclause ‎13.5.2&‎13.5.3)

13.8.3.1.1 For average winding temperature rise (measured by resistance method) (K) ...................

13.8.3.1.1.1 ITEM 1A (K) ....................................

13.8.3.1.1.2 ITEM 1B (K) ....................................

13.8.3.1.2 For top oil temperature rise (measured by thermometer) (K) ..............................................

13.8.3.1.2.1 ITEM 1A (K) ....................................

13.8.3.1.2.2 ITEM 1B (K) ....................................

13.8.3.1.3 For hot-spot temperature rise (K) ........ 98

13.8.3.1.3.1 ITEM 1A (K) ....................................

13.8.3.1.3.2 ITEM 1B (K) ....................................


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Name of Contractor:

REQUIRED OFFERED

13.8.3.2 After short-time (5 seconds) rated neutral current (subclause‎13.5.3):

13.8.3.2.1 For average winding temperature rise (measured by resistance method) (K) ...................

13.8.3.2.1.1 ITEM 1A (K) ....................................

13.8.3.2.1.2 ITEM 1B (K) ....................................

13.8.3.2.2 For top oil temperature rise (measured by thermometer) (K) ............................

13.8.3.2.2.1 ITEM 1A (K) ....................................

13.8.3.2.2.2 ITEM 1B (K) ....................................

13.8.3.2.3 For hot-spot temperature rise (K) ........ 118

13.8.3.2.3.1 ITEM 1A (K) ....................................

13.8.3.2.3.2 ITEM 1B (K) ....................................

13.9 Temperature rise for 1 hour acc. to ..................

for:

IEC 60076-6

scl. 10.6.2

13.9.1 ITEM 1A – loading by 250 A:

13.9.1.1 Average winding temperature rise (K) ...... 100

13.9.1.2 Top oil temperature rise (K) ......................

13.9.1.3 Calculated hot spot temperature at 40C

ambient temperature (C) ........................................

13.9.2 ITEM 1B – loading by 450 A:

13.9.2.1 Average winding temperature rise (K) ...... 100

13.9.2.2 Top oil temperature rise (K) ......................


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Name of Contractor:

REQUIRED OFFERED

13.9.2.3 Calculated hot spot temperature at 40C

ambient temperature (C) ........................................

13.9.3 The temperature of the winding after short-time current loading (subcl.‎13.8.3) during 5 seconds according to .............................................................

Shall not exceed (C) ..............................................

IEC

60076-5

250

13.10 The average temperature difference (gradient) winding to oil at:

13.10.1 Rated continuous neutral current 120 A (K) ..................................................................

13.10.2 Rated 1 hour neutral current:

13.10.2.1 ITEM 1A – 250 A (K) ................................

13.10.2.2 ITEM 1B – 450 A (K) ................................

13.11 Thermal time constant as defined in IEC 60076-2 and IEC 60076-7 for (2):

13.11.1 Oil (min.) ......................................................

13.11.2 Average winding (min.) ................................

13.12 Rated insulation level: ©

13.12.1 Insulation level for the line terminals and neutral terminal according to ....................................

IEC 60076-6 scl. 10.7

13.12.2 Rated short duration power frequency withstand voltage (kV r.m.s.) ....................................

70

13.12.3 Rated lightning impulse withstand voltage (kV peak) .................................................................

200

2 Estimated values shall be indicated. Exact values will be submitted after performing the temperature rise test.


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Name of Contractor:

REQUIRED OFFERED

13.13 Earthing Transformer connection symbol ......... ZN

13.14 Type of cooling method .................................... ONAN

13.15 Losses: © (with respect to

tolerances)

13.15.1 Losses prices/kW, which will be considered in the commercial evaluation of the proposal:

13.15.1.1 No load (excitation) losses ($/kW) ........... 6850

13.15.2 The losses values will be submitted only in the commercial stage of the proposal evaluation of this tender (Calculated losses values shall be introduced. Final measured values shall be within tolerances) ...............................................................

13.15.3 In the first stage of proposal only tolerances values shall be submitted .........................................

13.15.4 The tolerances for losses are according to .. IEEE C57.12.00

13.15.5 No load losses (excitation losses) at:

13.15.5.1 50 Hz and 22kV voltage applied (guaranteed) for:

13.15.5.1.1 ITEM 1A (kW + tolerance %) ...........

13.15.5.1.2 ITEM 1B (kW + tolerance %) ...........

+10%

+10%

13.15.5.2 50 Hz and 24kV voltage applied (guaranteed) FOR:



+10%

+10%


B - 20


Name of Contractor:

REQUIRED OFFERED

13.15.6 Load losses at 75C and:

13.15.6.1 Rated neutral current 120 A for:



+10%

+10%

13.15.6.2 Rated 1 hour neutral current for:



+10%

+10%

13.15.7 In case that transformer losses exceed the declared values, IECo reserves the right to reject the transformer, or to accept it with compensation according to APPENDIX No. 8 ................................

13.16 Guaranteed excitation current (referred to rated current) at:

13.16.1 100% voltage applied for:

13.16.1.1 ITEM 1A (%) .............................................

13.16.1.2 ITEM 1B (%) .............................................

13.16.2 105% voltage applied for:

13.16.2.1 ITEM 1A (%) .............................................

13.16.2.2 ITEM 1B (%) .............................................

13.17 Maximum inrush r.m.s. magnetizing current with no residual magnetism at 24 kV (pu based on rated continuous current) ...........................................


B - 21


Name of Contractor:

REQUIRED OFFERED

13.18 The total sound power level at rated voltage, rated one hour neutral current and rated frequency, calculated according to ..............................................

shall not exceed [dB(A)] ...........................................

Precise your offered value for:

ITEM 1A [dB(A)] .......................................................

ITEM 1B [dB(A)] .......................................................

IEC

60076-10

67 ©


B - 22

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.1. TESTS - GENERAL ©

14.1.1 Contractor shall perform Production Tests to check the quality and uniformity of the workmanship and materials used in the manufacture of the Earthing transformer .................................................

14.1.2 The Contractor shall prepare and submit an acceptance test plan (type, routine, and special) acc. to the requirements of this Specification at least (eight) 8 weeks before the testing .............................

14.1.3 Eight (8) weeks prior to the execution of the routine tests (also type and special test) the Contractor shall notify the Purchaser of the exact date of performing the tests ......................................

14.1.4 Tests shall be carried out according to requirements further specified ..................................

14.1.5 The tests shall be carried out in the presence of the Purchaser representatives ..............................

14.1.6 During dielectric tests the Earthing Transformer shall be equipped with the bushings that will be in permanent operation ...........................

14.1.7 All external components and fittings that are likely to affect the performance of the transformer during the tests shall be in place ...............................

14.1.8 Contractor shall also submit, test data to prove that the design has the capability to meet all the ratings as specified in Annexure “B” as well as relevant test reports ..................................................

14.1.9 Contractor shall indicate permissible tolerance for each tests value ...................................

14.1.10 Contractor shall submit with the tests reports a list of all measuring instruments including their accuracy class and type, test equipment , test circuits and calibration certificates ............................



B - 23

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.1.11 Routine, type and special test reports as well as the tests for the components (bushings, PRD, CT, etc.) of each erthing transformer shall be submitted to IECo for approval, one month before delivery, in 4 (four) hard copies and 1 (one) electronic media copy ...............................................

14.1.12 Contractor shall submit a list of all tests to be performed on site, after mounting of the Earthing Transformers and during operation ...........................

14.1.13 Contractor shall submit type, routine and special test reports to purchaser for approval prior to delivery .....................................................................

14.1.14 The equipment can be delivered only after approval of the relevant routine, type and special test reports ................................................................

14.1.15 After approval 1 (one) hard copy and one electronic media copy of the relevant final test reports of the equipment shall be submitted to purchaser ..................................................................

14.2. ROUTINE TESTS

14.2.1 Contractor shall perform all routine tests for each Earthing Transformer according to IEC recommendations, except where indicated otherwise and submit all test reports .........................

14.2.2 One month prior to delivery, the contractor shall submit to purchaser for approval, 4 (four) hard copies and 1 (one) electronic media copy of the routine test reports ....................................................

14.2.3 The Routine Tests Reports shall include:

14.2.3.1 Measuring of winding resistance (performed before no-load test), according to ..........

IEC 60076-1 scl. 11.2


B - 24

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.2 Measurement of zero-sequence impedance according to ...........................................

IEC 60076-6

scl. 10.9.5

And IEC 60076-1 scl. 11.6

14.2.3.2.1 In addition, for 2 or more units of the same order the differences of the similar impedance between each two transformers shall not exceed (%): ......................................................

10

14.2.3.3 Measuring of no-load losses and exciting current, at 100% of rated voltage according to ........

IEC 60076-6

scl.10.9.2

14.2.3.4 Lightning impulse on the line and neutral terminals according to .............................................. In the following order:

IEC 60076-3

clause 13 and IEC 60076-4

clause 11

14.2.3.4.1 Reduced voltage full wave (kVpeak) ..............................................................

One application

14.2.3.4.2 Full voltage wave .................................

(kV peak) .............................................................

Three applications

200

14.2.3.4.3 A neutral current measurement shall follow each reduced and full voltage wave application if current records are not obtained simultaneously with voltage records .......................

14.2.3.4.4 The impulse tests shall be performed with impulse testing equipment which complies with the requirements of .........................................

IEC

61083-1&2


B - 25

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.5 One minute power frequency separate source AC withstand voltage test, according to .......

at (kV r.m.s.) ............................................................

IEC 60076-3

cl. 10

70

14.2.3.6 Short-duration induced AC withstand voltage test for each transformer (LTAC) according to .................................................................

IEC 60076-3

cl. 12

14.2.3.6.1 With tests voltage not less than ........... Urx2

14.2.3.6.2 Frequency (Hz) ....................................

14.2.3.6.3 Time (sec) ............................................

14.2.3.7 Measurement of the dielectric dissipation

factor (tan) and the capacitance, on each transformer, according to .........................................

and in the following additional conditions:

IEEE Std

C.57.12.90

14.2.3.7.1 Measurement of the dielectric dissipation factor shall be made on fully assembled Earthing Transformer and with the tank connected to earth ..................................................

14.2.3.7.1.1 The measurement shall be performed at (kV) .................................................

10

14.2.3.7.2 The winding capacitance and dielectric dissipation factor shall be recorded for each voltage steps on both increasing and reducing voltage .............................................................

14.2.3.7.3 In the test report both the measured test temperature and the reference temperature shall be indicated ....................................................

14.2.3.7.4 The value of tan at 20C shall not exceed (%) .............................................................

1


B - 26

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.7.5 The report shall contain a table with the temperature correction factor in steps of 5°C up to the maximum temperature rise of the transformer, For the first delivered transformer exact measurements shall be performed during transformer cooling after temperature rise test completion .............................................................

14.2.3.8 Measurement of the windings insulation resistance and of the polarization index:

14.2.3.8.1 Measurement of the winding insulation resistance and of the polarization index (the ratio of apparent insulation resistance after 10 min. to that after 1 min, after the application of testing voltage) shall be performed on each transformer, at (kV DC) .............................................................

5

14.2.3.8.2 The tank shall be connected to ground during all measurements ........................................

14.2.3.8.3 The measurement shall be made between:

14.2.3.8.3.1 Winding and the tank according to ... IEC60076-1

cl. 11.1.4 (h)

14.2.3.8.4 Test Report for the polarization index measurement as well as variation of apparent winding insulation resistance with time shall be provided .............................................................

14.2.3.8.5 The value of the polarization index shall be higher than ................................................

1.5

14.2.3.8.6 In the test report, the temperature shall be indicated. The reference temperature shall also be indicated ............................................................


B - 27

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.9 Measurement of the insulation resistance between Core and/or frame and Tank during 1 min. shall be performed according to .......................

as follows:

IEC60076-1

cl. 11.12

14.2.3.9.1 When the core and the frame earth connections are not accessible (inside tank connection), the measurement shall be performed before the active part is installed in the tank, at (kV DC) .............................................................

0.5

14.2.3.9.2 When the core and the frame earth connections are accessible (outside tank connection) the measurement shall be performed on the fully assembled transformer at (kV DC) ......

2.5

14.2.3.10 In addition measurement of the insulation resistance between winding and core, before the active part is installed in the tank, at (kV DC) ..........

0.5

14.2.3.11 Determination of capacitances windings-to-earth, and between windings, according to .........

IEC 60076-1 scl.

11.1.2.2.a

14.2.3.12 Testing of current transformer according to .................................................................

IEC 61869-2

14.2.3.12.1 Magnetization curves shall be performed for the CT core ......................................

14.2.3.12.2 Check of the ratio and polarity of the CT .............................................................

14.2.3.12.3 Additional to the CT tests performed by the CT Manufacturer, the following tests shall be performed at the CT secondary winding terminals block, after assembling the current transformer:

14.2.3.12.3.1 Insulation resistance measurement at (kV r.m.s.) .........................................................

2.5

14.2.3.12.3.2 Winding resistance measurement ....


B - 28

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.13 Voltage tests for secondary circuits for 1 min. according to:

60076-3 scl. 9

14.2.3.13.1 For the auxiliary and control circuits at (kV r.m.s.) .............................................................

2

14.2.3.13.2 For the CT control circuits at (kV r.m.s.) .............................................................

2.5

14.2.3.14 Functional tests of auxiliary devices .........

14.2.3.15 Verification of the correct wiring ...............

14.2.3.16 Testing of the bushings according to ........ IEC 60137

14.2.3.17 Mechanical test:

14.2.3.17.1 Oil leak test: the tank, cover, oil-filled compartments and vital pipe works shall be tested for oil tightness according to Manufacturer’s Standards at a pressure of minimum (barg) ........... The Manufacturer shall describe in the proposal how the oil-leak test is to be performed

0.5

14.2.3.17.1.1 The Manufacturer shall describe in the proposal how the oil leak test is to be performed .........................................................

14.2.3.17.2 Vacuum withstand test:

14.2.3.17.2.1 Main tank without oil (KPa) ..............

14.2.3.17.2.2 Conservator (KPa) ...........................

14.2.3.17.2.3 Permanent enclosure deflection after the oil leakage test and vacuum test shall be recorded and mentioned in the test reports ...........

14.2.3.17.3 Functional tests shall be made on earthing transformer tank, oil level gauge, valves, etc. to prove proper operation.................................

14.2.3.17.4 Pressure test for radiators ....................


B - 29

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.2.3.18 Oil test for each oil quantity existing in the different transformer compartments, or deliverd in separate containers (if any), according to APPENDIX NO. 2 and .............................................

IEC 60296

14.2.3.19 Routine and sample tests for the hollow insulators performed by insulators manufacturer acc. to .................................................................

IEC 62155

14.2.3.20 Routine tests for all accessories (bushing, grounding bushing, CT’s, etc.) according to the relevant standards, shall be submitted ....................

14.3. TYPE TESTS

14.3.1 Besides the routine tests contractor shall perform all type tests for on the first delivered Earthing Transformer according to .............................

and submit all test reports ..........................................

IEC 60076-6

scl. 10.9.3.

14.3.2 The type test reports shall include:

14.3.2.1 Temperature-rise tests according to (only for the first new design of the earthing transformer)..

IEC 60076-2 cl. 6&7

14.3.2.2 The temperature rise test report shall include:

14.3.2.2.1 Winding temperatures, oil temperatures and hot spot temperatures at:

14.3.2.2.1.1 Rated continuous neutral current 120 A ...........................................................

14.3.2.2.1.2 Rated 1 hour neutral current:

14.3.2.2.1.2.1 For ITEM 1 A 250 A ........................

14.3.2.2.1.2.2 For ITEM 1 B 450 A ........................


B - 30

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.3.2.2.2 Chromatographic analysis of dissolved gases in the oil shall be performed before and after the temperature rise test according to ............

IEC 60076-2

Annex D.4 and IEC 61181

14.3.2.3 The external Infrared Thermograph of the tank shall be performed in order to check the effectiveness of the cooling system during the temperature rise test .................................................

14.3.2.4 Dielectric tests, according to ....................... IEC 60076-3

14.3.2.5 Determination of transformer sound level (only for the first delivered Earthing transformer ) according to ..............................................................

The measurement shall include:

IEC

60076-10

14.3.2.5.1 Measurement of sound pressure level of Earthing transformer under no-load and excited at rated voltage and rated frequency, at 0.3 m distance from the principal radiating surface ...........

14.3.2.5.2 Measurement of sound pressure level neutral of the Earthing transformer at rated continuous current 120 A and rated frequency, at 0.3 m distance from the principal radiating surface ..

14.3.2.5.3 In addition Manufacturer is requested to fill in all data in the enclosed APPENDIX No. 6 .......

14.3.2.6 Type tests for all accessories (bushing, grounding bushing, CT’s, etc.) according to the relevant standards, shall be submitted ......................

14.4. SPECIAL TESTS

14.4.1 In addition to the tests mentioned above, manufacturer shall perform the following special tests and supply the test report accordingly:


B - 31

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.4.1.1 Short-circuit test on the first delivered Earthing Transformer (ability to withstand short-circuit) according to .................................................. to demonstrate the following parameters:

IEC 60076-6

scl. 10.9.8 and IEC 60076-5

14.4.1.1.1 Maximum winding withstand symmetrical short-circuit current for:

14.4.1.1.1.1 ITEM 1A (kA r.m.s.) .......................... 4100

14.4.1.1.1.2 ITEM 1B (kA r.m.s.) .......................... 5300

14.4.1.1.2 Permissible duration for the symmetrical short-circuit current (sec) ........................................

5

14.4.1.1.3 Maximum permissible value of average temperature of the winding after short-circuit (Cº) ......................................................

250

14.4.1.1.4 Dynamic ability to withstand short circuit (kA peak) ...............................................................

14.4.1.1.5 The Earthing Transformer shall be designed and constructed to withstand without damage the thermal and dynamic effects of external short-circuits .............................................

14.4.1.1.6 For calculation of the short-circuit current at Earthing Transformer terminals the short-circuit power of the 24 kV system shall be assumed to be 500 MVA ........................................

14.4.1.2 Manufacturer shall guarantee the earthing transformer ability to withstand short-circuit as specified above and shall send all calculations connected to these requirements .............................

14.4.1.3 Additional to subcluase ‎14.2.3.3 , measurement of load and no load losses for each earthing transformer in the following conditions:


B - 32

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.4.1.3.1 No load losses at 24 kV according to: IEC 60076-6

scl. 10.9.4

14.4.1.3.2 Load losses at 75C for both ITEM 1A & ITEM 1B and:

14.4.1.3.2.1 Rated neutral current 120 A .............

14.4.1.3.2.2 Rated 1 hour neutral current .............

14.4.1.4 For each earthing transformer painting tests of all components, according to ....................... Level "1" is a minimal requirement ...........................

DIN EN ISO 2409

14.4.1.5 The cross-hatch painting test certificates shall include at least :

14.4.1.5.1 Identification number of the equipment ...

14.4.1.5.2 Testing code ...........................................

14.4.1.5.3 Prime and intermediate coat (description) and type of paint ................................

14.4.1.5.4 Spacing between cuts ............................

14.4.1.5.5 Thickness of coat and measuring instruments .............................................................

14.4.1.5.6 Test results .............................................

14.4.1.6 In case additional special tests are performed by Manufacturer, please indicate ............

14.4.1.7 Unreliability Demonstration Procedure as defined in APPENDIX NO. 4 ....................................

14.5. EQUIPMENT QUALIFICATION TO PROVE SEISMIC WITHSTAND

©

14.5.1 Earthing Transformer shall be tested or analyzed to prove the seismic design. The transformer shall be qualified according to ...............

IEEE Std

693


B - 33

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.5.2 The Earthing transformer shall be qualified taking into account the service configuration ............

14.5.3 Required seismic qualification level ............... Moderate level

14.5.4 The Earthing transformer performance level is defined according to ..............................................

IEEE Std 693/clause 8.3.2 and Fig A.2.

14.5.5 The Earthing transformer shall be tested or analyzing for the Required Response Spectrum according to ..............................................................

IEEE Std 693/clause A.1.2.2.1. and Figure

A.2

14.5.6 Required qualification method for different kind of equipment:

IEEE Std 693

14.5.6.1 Seismic withstand capability for the earthing transformer shall be demonstrated according to .............................................................

Annex D.3, A1.4

inherently acceptable

14.5.6.2 Seismic withstand capability for ceramic material and insulators shall be demonstrated by ....

Annex D.3, A1.4

inherently acceptable

14.5.6.3 Seismic withstand capability for terminal boxes shall be demonstrated by ..............................

Annex L.4.2,

A1.3.1 at 1.5g

14.5.6.4 After performing the tests or analysis the Contractor is requested to submit for approval the following documents:

14.5.6.4.1 Seismic analysis qualification report according to ............................................................

IEEE Std 693/Annex

S


B - 34

14. TESTS - GENERAL

Name of Contractor:

REQUIRED OFFERED

14.5.6.4.2 Seismic test qualification report according to ............................................................

IEEE Std 693/Annex

T

14.6. TESTS AFTER ERECTION ON SITE

14.6.1 Manufacturer may suggest alternatives for tests on site however the final test program shall be agreed between Purchaser and Manufacturer ..........

14.6.2 The field tests will be performed by the Purchaser in the presence (if required) and under responsibility of Contractor’s delegate according to APPENDIX NO. 1 .....................................................

14.6.3 The site tests shall include also a SFRA test to compare its results with the Fingerprint test carried out ................................................................

14.6.4 In case additional tests are required by Manufacturer please indicate ....................................


B - 35

15. DESIGN AND CONSTRUCTION

Name of Contractor:

REQUIRED OFFERED

15.1. MAGNETIC CIRCUIT

15.1.1 The core shall be manufactured of high quality cold-rolled grain oriented, low-loss, non-aging sheet steel lamination, according to .............................

ASTM A876 and/or IEC 60404-8-7

15.1.2 Type ...................................................................

15.1.3 Manufacturer ......................................................

15.1.4 Manufacturer’s designation and catalogue number .........................................................................

15.1.5 Type of sheet .....................................................

15.1.6 Material of the sheet ..........................................

15.1.7 Thickness of the sheet (mm)..............................

15.1.8 The sheets shall be insulated Please indicate the Manufacturer and type of insulation ........................

15.1.9 The sheets shall be pressed by means of glass tapes and suitable tension screw ........................

15.1.10 Indicate whether step lapped core method is used in construction of magnetic circuit ........................

15.1.11 Indicate if magnetic shunts/screens are required ........................................................................

15.1.11.1 Send details ................................................

15.1.11.2 The shunts/screens operating efficiency shall be proved during transformers short-circuit test, by measuring the electric field quantity which is passed through ....................................................................


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15.1.12 In order to provide external removable core grounding and frame connections, on the lower part of the transformer, the magnetic circuit earthing links shall be brought outside the transformer tank as follows:

15.1.12.1 The earthing connection between magnetic circuit and tank shall be provided ................................ in case of internal connection, earthing pad shall be accessible after partial draining of oil. Indicate oil drained quantity (t) .......................................................

15.2. WINDING

15.2.1 Type of winding (disk, layer, interleaved, etc.):

15.2.1.1 In order to protect the coil copper wire against sulfur corrosion phenomena, the copper wire used for windings production shall be enameled according to ..

IEC 60317

15.2.2 Material, type, standard or specification and catalogue number of insulation for:

15.2.2.1 Winding ..........................................................

15.2.2.2 Tapping Connections .....................................

15.2.2.3 Side plates .....................................................

15.2.2.4 Thermally upgraded paper or equivalent shall be used for winding insulation .....................................

15.2.2.5 Manufacturer's upgraded paper .....................

15.2.2.6 Catalogue number .........................................

15.2.3 Conforming standards ....................................... IEC 60554 IEC

60641-3-1

15.2.4 Thermal class of winding insulation according to IEC 60085 (°C) .............................................................

120 (E)


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15.2.5 Winding capacitance to earth (per phase) (pF) .

15.2.6 Series capacitance (pF) ...................................

15.2.7 Resistance of winding at 75 °C (per phase) ..... :

15.2.7.1 Winding () ..................................................

15.2.7.2 Joint of wire:

15.2.7.2.1 The joints shall be tin plated .......................

15.2.7.2.2 Joint of wire into winding:

15.2.7.2.2.1 The winding design shall care for a minimum number of joints of wire into the same winding, then the actual performed joints shall not exceed the designed number ....................................

15.2.7.2.2.2 Type of technology (welding, soldering)

15.2.7.2.2.3 Test of samples according to ................ IEC 60851

15.2.7.2.3 Joint between ends of winding and leads ...

15.2.7.2.4 Joint between leads of winding and bolts of bushings:

15.2.7.2.4.1 The connections of the bushings shall be performed at bushings superior part, in order to permit easy connection removal and assembly ...................

15.2.7.2.4.2 Type of joint ..........................................

15.2.7.2.5 The flexible connections inside the tank shall be performed of thin copper tapes instead of copper fibers ...................................................................


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15.3. EARTHING TRANSFORMER TANK

15.3.1 Tank Manufacturer .............................................

15.3.2 The Earthing Transformer tank shall be of welded steel plate construction, reinforced in order to withstand the conditions of operation, and transport and vacuum treatment .........................................................

15.3.3 The steel grade shall be .................................... BS EN 10025 grade S235 JR or equivalent (indicate)

15.3.4 Other steel grades will be subjected to Purchaser approval ........................................................................

15.3.5 All welding shall be according to the standard for “Welded steel tanks for oil storage” ..............................

API 650 standard or European equivalent standards (DIN, EN)

15.3.6 Details of welding: Tanks and their structural attachments shall be welded by the SMAW with basic E70 covered electrodes conform to AWS A5.1, GTAW, SAW, FCAW with E71T-5 electrode conform to AWS A5.20. Use of any other process shall be by agreement between the Contractor and the Purchaser. Welding shall be performed in a manner that ensure full penetration and complete fusion in the vertical and horizontal butt welds .....................................................

15.3.7 Welders qualification: The Contractor shall conduct tests for all welders assigned to manual and semiautomatic welding and all operators assigned to automatic welding to demonstrate the welders and operators ability to make acceptable welds ..................

15.3.8 Inspection of welds:


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15.3.8.1 Butt welds: Inspection for the quality of the welds shall be made using visual method ..................

15.3.8.2 Fillet welds: Inspection for the quality of the welds shall be made using the visual method ............

15.3.9 The Earthing transformer tank shall be absolutely water and hot-oil tight and provided with heat exchangers and oil tight cover ......................................

15.3.10 The mechanical design of the tank shall prevent water accumulation on the Earthing transformer cover in order to avoid corrosion appearance ............................

15.3.11 The tank, oil-filled components and vital pipe works shall withstand the maximum static weight of oil in service plus an additional over pressure of minimum (barg) .........................................................................

A routine test shall be performed to prove the above requirement ..................................................................

0.5

15.3.12 The tank shall be designed to withstand the vacuum produced by the oil treatment equipment ........

15.3.13 The construction of the tank shall enable easy installation or removal of bushings, and other accessories without disturbing the leads, untanking the Earthing transformer or removing the cover .................

15.3.14 The joints between the tank and the cover and between various sections shall be provided with suitable flanges and properly spaced bolts and gaskets to make joints oil-tight .................................................................

15.3.15 Three pockets shall be provided on Earthing transformer cover:


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15.3.15.1 Pocket for oil thermometer ..........................

15.3.15.2 Pocket for resistance bridge controller ........

15.3.15.3 Reserve pocket ...........................................

15.3.16 The Earthing transformer cover shall be designed with provisions for bushings, and pressure relief device...................................................................

15.3.17 Lifting eyes for Earthing transformer cover, conservator and lugs for lifting completely assembled Earthing transformer shall be provided .........................

15.3.18 Four (4) jacking points shall be provided at height not less than 350 mm to transformer base and shall be sufficient wide to permit a tolerance from the center line of 150 mm ................................................... Please indicate location and relevant dimensions ........

15.3.19 The zinc spraying and painting of the tank shall enable withstanding the service conditions specified under clause ‎12 and shall be carried out according to APPENDIX No. 5 Indicate coat thickness for:

15.3.19.1 Zinc spraying (m) ..................................... 150

15.3.19.2 Epoxy Painting Coat (m) ........................... 70

15.3.19.3 Polyurethane Topcoat (m)......................... 50

15.3.19.4 Interior coat (if applicable) (m) .................

15.3.20 All the metal parts, exclusive of those energized, shall be grounded........................................

15.3.21 Each grounding pads shall withstand the system short-circuit current level (kA/sec) ....................

12/1

15.3.22 The tank shall also be provided with:


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15.3.22.1 1" oil drain and filtering valve, at the bottom of the tank, type .......................................................... ....................................................................

15.3.22.2 3/8" minimum, oil sampling valve placed on the drain side of the drain valve, type .........................

15.3.22.3 All other necessary valves for vacuum and filling, draining and filtration of oil shall be provided ...

15.3.22.4 Two (2) grounding pads with tapped holes shall be provided. Location shall be indicated in relevant drawing .........................................................

Indicate material of grounding pads ..........................

15.3.23 The tank shall be fitted with a pressure-relief device to protect against high pressures inside the oil tank .........................................................................

15.4. SKIDS

15.4.1 The bottom of the Earthing transformer shall be provided with a steel skid base, suitable for skidding in directions parallel to both center lines of the tank .........

15.4.2 Pulling eyes at base of Earthing transformer for moving the transformer parallel to either center line of transformer shall be provided .......................................

15.4.3 The Earthing transformer shall be fixed firmly to its foundation to avoid transformer moving in any direction in case of a seismic event as defined under subclause ‎12.3 .............................................................. The anchoring shall be according to .............................

IEEE 693


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15.4.4 Provisions for blocking the Earthing transformer after its installation shall be provided. The Earthing Transformer shall be fixed firmly through the blocking system to the foundations. This blocking shall avoid transformer moving in any direction in case of a seismic event as defined under subclause ‎12.3 ........................

15.5. GASKETS

15.5.1 The necessary gaskets shall be tight under all conditions especially against the hot oil. Means shall be provided to prevent over compression of the gaskets ...

15.5.2 Material of gaskets shall be synthetic rubber which shall not deteriorate under the action of hot oil ...

15.5.3 The materials used in gaskets production shall be corrosive sulfur free .................................................

15.5.4 Gaskets between metal surfaces shall be set in grooves so that all parts are bolted metal to metal .......

15.5.5 A full spare set of gaskets for Earthing Transformer bushings, radiators, conservator and all valves shall be provided with instruction and drawings for location, storage and identification (part number) ....

15.6. OIL AND OIL PRESERVATION SYSTEM

15.6.1 The Earthing transformer oil shall meet the requirements indicated in IECo. Laboratory “Specification for inhibited mineral insulating oil, supplied with new equipment” No. 52/6.90/93 No. 50/2013 (see APPENDIX NO. 2) ..................................

15.6.2 The Earthing transformer oil certificate shall be approved by Purchaser before delivery ........................

15.6.3 Oil manufacturer and type , according to I.E.Co Oil Specification No. 50/2013 (see APPENDIX NO. 2) .

©


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15.6.4 The Earthing transformer oil shall be corrosive sulfur free ......................................................................

15.6.5 Oil preservation system shall be provided for protecting the oil against atmospheric moisture and oxygen ..........................................................................

15.6.6 Oil preservation system shall be Manufacturer’s standard, excluding any system that permits direct contact between oil and air. All necessary accessories shall be supplied by Manufacturer ................................

15.6.7 Type of oil preservation equipment ....................

15.6.8 The anti-vibration supports shall be provided between conservator and its support:

15.6.8.1 Type ...............................................................

15.6.8.2 Manufacturer ..................................................

15.6.8.3 Number ..........................................................

15.6.8.4 Rated load (Kg) ..............................................

15.6.8.5 Standard or Specification shall be attached ...

15.6.9 The conservator shall be provided with synthetic membrane and all necessary drain cocks, plugs for oil filling, connection to tank, etc. .......................................

15.6.10 The conservator shall enable to withstanding all the conditions as specified under clause ‎12 .................

15.6.11 The conservator shall be provided also with an oil level gauge ...............................................................

15.6.12 The conservator shall be provided with a cobalt free silica gel air drier complying with APPENDIX No. 7 requirements:


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15.6.12.1 Type .............................................................

15.6.12.2 Manufacturer ................................................

15.6.12.3 Standard or Specification shall be attached .

15.6.12.4 In addition Manufacturer is requested to fill in all data in the enclosed APPENDIX No. 7 ...................

15.6.12.5 Additional to requirements of Specification no. 804 for silica gel, from APPENDIX No. 7, proposal based on cobalt free silica gel will be also accepted ...

15.6.13 The silica gel shall be clearly visible through a glass and shall be mounted at 1.5 m approximately above ground level .......................................................

15.6.14 IECo shall be allowed to mount the silica gel air dryer 2 m away from the Earthing Transformer if it is required by the substation layout ..................................

15.6.15 The paint, insulation materials and all other materials in contact with transformer oil shall not contain any substance that may, to any extent, influence its dielectric properties or result in chemical reactions with the oil, or in any way lead to a deterioration of oil quality

15.6.16 Recommended vacuum for site oil filling (KPa)

15.6.17 First filling of oil shall be provided by Manufacturer .................................................................

15.7. COOLING SYSTEM

15.7.1 The cooling system shall consist of the necessary heat exchanger required to maintain the specified temperature rise in subcl. ‎13.8 and in the

service conditions from subcl. ‎12 ................................


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15.7.2 Heat exchanger:

15.7.2.1 The heat exchanger shall be divided in coolers (radiators). Indicate number.........................................

15.7.2.2 Manufacturer’s radiator .................................. Menk (preferred)

or equivalent according to subclause

‎10.6

15.7.2.3 All radiators of the heat exchanger shall be equipped with valves to permit the removal of any radiator without draining the oil from the cooling system .......................................................................

15.7.2.4 Vent holes with plugs shall be provided in the top and drain holes with plugs in the bottom of each radiator or heat exchanger...........................................

15.7.2.5 The studs, as well as their threaded holes, used in various subassemblies in contact with the atmosphere shall be silicone greased before fastening

15.7.2.6 The finish and painting of the radiators shall enable withstanding the service conditions specified under clause ‎12 (see also requirements on subcl.

‎9.2.1) and shall be carried out according to APPENDIX No. 5 Indicate coat thickness for:

15.7.2.6.1 Hot dip galvanizing (m) ........................... 60

15.7.2.6.2 Painting coat (m) ..................................... 50

15.7.2.6.3 Top coat color gray RAL 7038 (m) ..........

50

15.7.2.7 All corners and problematic places will be strip coated


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15.8. CONTROL BOX

15.8.1 The control box, mounted on transformer tank, shall be provided with a door for front access, handles, locking facilities (key locks), barrier type terminals and all equipment required for local operation .....................

15.8.2 All necessary protective devices, switches, etc. shall be assembled in dust proof and weatherproof hot dip galvanized metal or aluminum box arranged for mounting on the tank ....................................................

15.8.3 Conforming standards ....................................... IEC 61439 – 1&2

15.8.4 A 25 W, 230V AC lamp with a switch shall be provided inside the control box .....................................

15.8.5 One (1) 220 VAC, 15 A electric outlet shall be provided for service purposes .......................................

15.8.6 The control box shall be provided with environmental protection of type at least ...................... according to ..................................................................

IP 55

IEC 60529

15.8.7 Material of the control box ................................

15.8.8 Thickness of the control box .............................

15.8.9 The control box shall be provided for terminating the conduits and wiring for Purchaser’s connection ....................................................................

15.8.10 Glands on the bottom of control box shall be provided. Indicate number ............................................

15.8.11 Drain holes shall be provided at low points of box and conduits ...........................................................


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15.8.12 The control box shall be accessible from ground level for operation by a man. The bottom of the control box shall be located higher than 800 mm above transformer base ...........................................................

15.8.13 The control box shall be supported by suitable vibration damping device ..............................................

15.9. WIRING

15.9.1 Wiring shall be designed according to enclosed EPD-A.03/99 2004 Standard, Revision F (APPENDIX NO. 3) unless otherwise required in this Specification ..

©

15.9.2 The Purchaser can furnish the following power supply voltages:

15.9.2.1 Power circuits (V AC supply circuits , single - phase) .......................................................................

230

15.9.2.2 Alarm circuits (V DC) ..................................... 220

15.9.2.3 Control circuits (V AC) ................................... 230

15.9.3 All small wiring for accessory equipment shall be installed in standard galvanized rigid steel conduits, or electrical metallic tubing or ducts, with water tight joints (indicate type) ...............................................................

15.9.4 Wiring shall be carried out with flexible conductors with a preferred cross-section as follows:

15.9.4.1 Control circuits (mm2) .................................... 1.5

15.9.4.2 Secondary circuits of bushing current transformer (mm2)........................................................

4

15.9.5 All small wiring enclosures shall be grounded ...

15.9.6 The terminal blocks in the control boxes shall be as follows:


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15.9.6.1 Current circuits ............................................... Phoenix UGSK/S +

GS

15.9.6.2 Control circuits ............................................... Phoenix UK6N

15.9.7 All control and instrument wiring, alarm leads and instrument transformer secondary's for connection to Purchaser’s cables shall be terminated at terminal blocks

15.9.8 The blocks shall be spaced to allow 1½” (inch) clearance on all sides. Liberal space shall be provided for training and crossing Purchaser’s incoming leads ...

15.9.9 The size of Purchaser’s incoming conduits will be 2” or larger ....................................................................

15.9.10 Ten (10) percent free terminals shall be left at Purchaser’s disposal in each terminal block .................

15.9.11 The assembled control equipment and wiring connections shall be subjected at the factory after fabrication and complete assembly to an one minute power frequency test of (kV AC) ..................................

2

15.10. ACCESSORIES3

The following accessories shall be provided for the protection and control of the earthing transformer:

15.10.1 Twin-float Buchholz relay:

3 The requirements written in Italic font style belongs to the preffered option.


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15.10.1.1 Manufacturer ................................................ EMB or equivalent

according to subclause

‎10.6

15.10.1.2 Manufacturer's designation .......................... DR 25

15.10.1.3 Type ............................................................. XB-0278-01

15.10.1.4 Vent valve for taking gas sample shall be provided .....................................................................

15.10.1.5 Number and type of contacts ....................... 2 changeover

15.10.1.6 The contacts shall be aired to barrier type terminals accommodated in a control box mounted direct on transformer tank ............................................

15.10.1.7 Make/break current for 220V DC and time constant 40 msec (A/A) ...............................................

2/2

15.10.1.8 Switching capacity of the contacts (W) .........

15.10.1.9 Test voltage to ground 50 Hz, 1 min (kV r.m.s.) .....................................................................

2

15.10.1.10 The relay shall be tested for leaks at:

15.10.1.10.1 Pressure (bar) .........................................

15.10.1.10.2 Time (min) ..............................................

15.10.1.11 Shock and vibration proof up to (m/sec2) ...

In frequency range .......................................................

15.10.1.12 Degree of protection .................................. IP55

15.10.1.13 Manufacturer recommendation for alarm/trip ...................................................................


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15.10.1.13.1 Oil level above pipe center (mm±) ..........

15.10.1.13.2 Gas accumulation or oil loss (cm3±) .......

15.10.1.13.3 Oil flow velocity referred to nominal pipe size (cm/s±%) ..............................................................

15.10.2 Oil level gauge mounted on conservator:

15.10.2.1 Manufacturer ................................................ Qualitrol or equivalent


‎10.6

15.10.2.2 Manufacturer’s designation (order No.) ........

15.10.2.3 Type ............................................................. magnetic

15.10.2.4 Scale diameter (mm) ....................................

15.10.2.5 Oil-level indicator shall be provided with one low level alarm contact ................................................

15.10.2.6 The scale shall be divided ,in appropriate temperature values, in order to allow a proper oil filling procedure, in any environmental conditions ................

15.10.2.7 Number and type of contacts (normally-open, normally closed, changeover) ......................................

1 NO + 1 NC

15.10.2.8 The contacts shall be wired to barrier type terminals accommodated in a control box mounted direct on transformer tank ............................................

15.10.2.9 Make/break current of the alarm contact for 220 V DC and time constant of 4 mSec (A/A) ..............

15.10.2.10 Switching capacity of the alarm contact (W) ...................................................................


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15.10.2.11 Test voltage to ground 50 Hz, 1 min (kV r.m.s.) ...................................................................

2

15.10.2.12 Shock and vibration proof up to (m/sec2) in frequency range (Hz to Hz) ..........................................

15.10.2.13 Degree of protection .................................. IP 55

15.10.3 Pressure relief valve mounted on the cover, to safeguard the tank against abnormal internal overpressures:

15.10.3.1 Manufacturer.............................................. Qualitrol or equivalent


‎10.6

15.10.3.2 Manufacturer’s designation (order No.) .....

15.10.3.3 Type ........................................................... spring load

15.10.3.4 Automatic or manual reset .........................

15.10.3.5 Operating response pressure (bar) ............

15.10.3.6 Number and type of the trip contacts ........

1 changeover

15.10.3.7 Make/break current of the trip contacts, for 60V DC and time constant 40 msec (A/A) ...................

15.10.3.8 Switching capacity of the trip contacts (W)

15.10.3.9 Test voltage to ground 50 Hz, 1 min (kV r.m.s.) ...................................................................

2

15.10.3.10 Shock and vibration proof up to (m/s2) ....... in frequency range (Hz to Hz) ......................................


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15.10.3.11 Degree of protection .................................. IP 55

15.10.4 Pointer thermometer for local measuring of oil temperature:

©

15.10.4.1 Manufacturer.............................................. MESSKO or equivalent


‎10.6

15.10.4.2 Manufacturer’s designation (order No.) .....

TRASY 2 MT-ST 160F

15.10.4.3 Catalogue number ..................................... 635082

15.10.4.4 Type ........................................................... dial

15.10.4.5 The pointer thermometer shall include:

15.10.4.6 Thermo well Part No. ................................. 174800

15.10.4.7 Thermometer case welded into transformer according to .................................................................

DS/EN 50216-4

15.10.4.8 Measuring range (C) ................................ -20 to +140

15.10.4.9 Tolerance of indication ............................... class 1 DIN 16203

15.10.4.10 The oil temperature indicator shall have appropriate contacts for alarms and tripping the CB’s of transformer ..................................................................

15.10.4.11 Number / type of adjustable alarm contacts (normally-open, normally-closed, changeover) ............

4

15.10.4.12 Switching capacity of the contacts ............. 5A 220V AC 0.1A

250V DC

15.10.4.13 Capillary (length/type) ................................ 6m/23


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15.10.4.14 Number of cable glands/ type .................... 4/2

15.10.4.15 Test voltage to ground 50Hz, 1 min (kV r.m.s.) ...................................................................

2

15.10.4.16 Shock and vibration proof up to (m/s2) ....... in frequency range (Hz to Hz) ......................................

2g

5 - 15

15.10.4.17 Degree of protection .................................. IP 55 IEC 60529

15.10.4.18 Manufacturer recommendations for temperature values setting (at 250 A):

on off

15.10.4.19 Alarm (C) ..................................................

15.10.4.20 Trip (C) .....................................................

15.10.5 Resistance bridge controller Mounted in pocket of the cover tank:

15.10.5.1 Manufacturer..............................................

15.10.5.2 Manufacturer’s designation ........................

15.10.5.3 Type ...........................................................

15.10.5.4 Resistance of the temperature sensor () .

15.10.5.5 The resistance bridge controller shall be wired to barrier type terminals accommodated in a terminal box mounted direct on transformer tank ........

15.11. BUSHINGS

15.11.1 The connections between transformer, voltage system and neutral point, will be achieved by bushings

15.11.2 The bushings shall be designed for the service conditions stated in clause ‎12 of this Specification and tested according to .......................................................

IEC 60137


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15.11.3 The external bushings insulator (envelope) must fulfill the requirements for outdoor heavy duty, high grade, high creepage path type, suitable for the climatic, environmental and atmospheric conditions as described under Clause ‎12 ...........................................

15.11.4 Insulator's Pollution levels according to Desert and Coastal-Industrial types of environments, as defined by IEC 60815-1/2008:

15.11.4.1 Environmental type of pollution ................... combination of type A

and type B, A-prevalent

15.11.4.2 Site pollution severity (SPS) class .............. e (very heavy)

15.11.5 The following types of bushings shall be provided:

15.11.5.1 Type 1 - (24 kV) line and neutral bushings for ITEM 1A ................................................................

15.11.5.2 Type 2 - (24 kV) line and neutral bushings for ITEM 1B ................................................................

15.11.5.3 Type 3 - (1.0 kV) core and frame earthing bushing

15.11.5.4 Technical requirements for the line and neutral bushings:

Type 1 Type 2 Type 1 Type 2

15.11.5.4.1 Manufacturer .......................................... Micafil

Haefely

Siemens

Reyroll

Zapel (preferred) or

equivalent

(according to subclause ‎10.6


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15.11.5.4.2 Manufacturer’s designation and catalogues:

15.11.5.4.3 Type .......................................................

15.11.5.4.4 Number .................................................. 4

15.11.5.4.5 External bushings hollow insulator (envelope):

15.11.5.4.5.1 Material .............................................. porcelain or composite

15.11.5.4.5.2 Manufacturer .....................................

15.11.5.4.6 Condenser core insulation technology ...

15.11.5.4.7 Rated voltages:

15.11.5.4.7.1 Highest phase-to-phase voltage (kV r.m.s.) ..........................................................

36

15.11.5.4.7.2 Rated phase-to-earth voltage (kV r.m.s.) ..........................................................

20.8

15.11.5.4.7.3 Maximum phase–to-earth temporary overvoltages the bushings can withstand according to (kV) ..........................................................

IEC 60137

cl. 5.1

15.11.5.4.8 Insulation levels:

15.11.5.4.8.1 Lightning impulse withstand voltage

1.2/50sec (dry) (kV peak) ........................................

170

15.11.5.4.8.2 Power frequency withstands voltage, (dry) (kV r.m.s.) .........................................................

77

15.11.5.4.8.3 Power frequency withstands voltage, (wet) (kV r.m.s.) .........................................................

70


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15.11.5.4.9 Rated currents according to ................... ...............................................................

IEC 60137 cl. 4.2 & 4.3

15.11.5.4.9.1 Rated continuously current of the bushings related to the rated current of the earthing transformer, not less than (p.u.) ................................

1.2

1.2

15.11.5.4.9.2 Rated one hour current (A) ................

250 450

15.11.5.4.9.3 Rated thermal short-time current (Ith) at 5 sec, at least (A) ..................................................

4100

5300

15.11.5.4.9.4 Dynamic short-circuit withstand current (kA peak) ..........................................................

2.5Ith

2.5Ith

15.11.5.4.10 Required minimum values of cantilever withstand load applied on the bushings as defined in

IEC 60137 clause 4.5 (level II)

15.11.5.4.10.1 Cantilever operating load not less than (N) ..........................................................

625

15.11.5.4.10.2 Cantilever test load (N) ...................... ..........................................................

1250

15.11.5.4.10.3 Recommended rope pull (N) .............

15.11.5.4.11 Partial discharge level at highest system voltage (Um) shall not exceed (pC) ............................

10

15.11.5.4.12 Before and after the dielectric routine tests, measurements of dielectric dissipation factor

(tan ) and capacitance shall be carried out on the main conductor, according to .....................................

IEC 60137 cl. 9.1

15.11.5.4.12.1 Maximum value of dielectric

dissipation factor (tan ) at ambient temperature and at shall not exceed ........................................................

1.05 Um/3 0.007


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15.11.5.4.12.2 A measurement of tan and capacitance at a voltage between 2 kV and 20 kV shall be performed as a reference value for measurements carried out later when the bushing is in operation ..........................................................

15.11.5.4.13 The bushings shall be designed for operation in the temperature conditions stipulated in clause ‎12 and according to .........................................

IEC 60137 clauses 4.8, 5.3 &10.1

15.11.5.4.14 The temperature limits of metal parts in contact with insulating material according to subclause ‎13.8(°C) ...............................................................

15.11.5.4.15 Angle of mounting from the vertical (°) ...

15.11.5.4.16 Creepage distance:

15.11.5.4.16.1 Minimum reference unified specific creepage distance (RUSCD) according to SPS class e (mm/kV) ..........................................................

53.7

15.11.5.4.16.2 Correction factor (Kad) of the reference unified specific creepage distance RUSCD, for insulator average diameter Da

4 ................................. ..........................................................

15.11.5.4.16.3 Minimum corrected unified specific creepage distance (USCD) (mm/kV) .........................

15.11.5.4.16.4 Minimum total creepage distance5 (L) of the insulator (mm) ................................................

15.11.5.4.17 Arcing distance (A) not less than (mm) ..

4 Detailed explanations on pages B-142 to B-146

5 L=

𝑈𝑚𝑎𝑥

√3∗ corrected USCD


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15.11.5.4.18 Maximum Creepage factor CF ............... 4

15.11.5.4.19 The bushings shall have permissible temporary overvoltage capabilities not lower than the transformer ...............................................................

15.11.5.4.20 Bushings shall be capable to carry maximum (not lower than) permissible overload current of earthing transformer ...................................

15.11.5.4.21 Maximum permissible overload of the bushing acc. to ...........................................................

IEC 60076-7

15.11.5.4.21.1 The bushing hottest spot temperature above the temperature of the immersion medium in

overload condition (C) ..............................................

15.11.5.4.21.2 Duration (sec.) ...................................

15.11.5.4.22 The insulators shall be of Open or Anti-fog profiles, with alternanting or non-alternating sheds arrangement (according to the enclosed drawings on pages B-145 to B-149) permitting easy access for greasing and cleaning to all surfaces .........................

15.11.5.4.23 The insulators shall be only “windformed” type, not “drop shaped edge” and not with under ribs

15.11.5.4.24 Please indicate on enclosed drawing on pages B-145 to B-149 all dimensions required ...........

15.11.5.4.25 Material of the conductor terminal ..........

copper

15.11.5.4.26 Diameter of the conductor terminal (mm)

15.11.5.4.27 Cross sectional area of the conductor terminal (mm2) ............................................................


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15.11.5.4.28 Indicate whether the protective gaps are provided for bushings ...........................................

15.11.5.4.29 The Type 1&2 (24 kV) bushings shall be of simple design such as hollow insulator and not as bushing with internal insulation ..............................

15.11.5.4.30 The connection between the windings and the Type 1&2 (24 kV) bushings terminals shall be performed in a such manner to avoid the current passing through any screwed connection...................

15.11.5.4.31 Please indicate the applied special treatments for the metallic parts corrosion protection .

15.11.5.4.32 Total weight (including flanges) (Kg) ...

15.11.5.4.33 Additional technical requirements:

15.11.5.4.33.1 Indicate whether the protective gaps are provided for bushings ..........................................

15.11.5.4.33.2 The (24 kV) bushings shall be of simple design such as hollow insulator and not as bushing with internal insulation .................................

15.11.5.4.33.3 The connection between the windings and the (24 kV) bushings terminals shall be performed in such a manner to avoid the current passing through any screwed connection .................

15.11.5.4.33.4 Please indicate the applied special treatments for the metallic parts corrosion protection

15.11.6 Technical requirements for Type 3 (1.0 kV) core earthing bushing:

15.11.6.1 Manufacturer ..............................................

15.11.6.2 Type............................................................


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15.11.6.3 Material and color ......................................

15.11.6.4 Rated voltage (kV) ..................................... 1

15.11.6.5 Rated current (In) .......................................

15.11.6.6 Dry lightning impulse withstand voltage

1.2/50sec (kV peak) ...................................................

15.11.6.7 Power frequency withstand voltage, dry and wet (kV r.m.s.) .............................................................

15.11.6.8 Rated thermal short-time current (Ith) at 10 sec (kA r.m.s.) .............................................................

1.5

15.11.6.9 Dynamic short-circuit withstand current (kA peak) ...................................................................

2.5 Ith

15.11.6.10 Maximum permissible overload of the bushing:

15.11.6.10.1 The bushing hottest spot temperature above the temperature of the immersion medium in

overload condition (C) ...............................................

15.11.6.10.2 Duration (sec.) .....................................

15.11.6.11 Minimum external creepage distance (mm)

15.11.6.12 Material of the conductor terminal ..............

15.11.6.13 Diameter of the conductor terminal (mm) ..

15.11.6.14 Cross sectional area of the conductor terminal (mm2) .............................................................

15.11.6.15 Total weight (including flanges) (Kg) ..........

15.11.7 All types of bushings shall be provided with nameplates according to ...............................................

IEC 60137 cl. 6.2


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15.11.8 The following data shall be supplied on nameplate for type 1&2:

15.11.8.1 One hour rated current(A) ..........................

15.11.8.2 Creepage distance .....................................

15.11.8.3 Cantilever withstand service load ..............

15.12. BUSHING CT’S

15.12.1 Bushing type current transformer shall be furnished on the neutral bushing ...................................

15.12.2 The bushing current transformer shall be designed and tested in accordance with .......................

IEC 61869-2

15.12.3 Manufacturer ...................................................

15.12.4 Number of cores .............................................. 1

15.12.5 Type of cores ................................................... protection

15.12.6 Rated ratio for:

15.12.6.1 ITEM 1A (A/A)............................................ 250/5

15.12.6.2 ITEM 1B (A/A)............................................ 500/5

15.12.7 Rated continuous thermal current for:

15.12.7.1 ITEM 1A (A) ............................................... 250

15.12.7.2 ITEM 1B (A) ............................................... 500

15.12.8 Rated burden (VA) ......................................... 20

15.12.9 Accuracy class ............................................... 5P

15.12.10 Accuracy limit factor (ALF) ............................. 10

15.12.11 Current error at rated primary current (%) ......

3


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15.12.12 Phase displacement at rated primary current (min) .......................................................................

60

15.12.13 Composite error at rated accuracy limit primary current (%) .......................................................

<5

15.12.14 Secondary winding resistance, Rct at 20C () .......................................................................

15.12.15 Knee point voltage for:

15.12.15.1 ITEM 1A (V) ...............................................

15.12.15.2 ITEM 1B (V) ...............................................

15.12.16 Magnetizing current at knee point voltage for:

15.12.16.1 ITEM 1A (A) ...............................................

15.12.16.2 ITEM 1B (A) ...............................................

15.12.17 Rated short-time (2 sec) thermal current (kA r.m.s.):

15.12.17.1 Rated dynamic current for:

15.12.17.1.1 ITEM 1A (kA peak) ...............................

15.12.17.1.2 ITEM 1B (kA peak) ...............................

15.12.17.2 Rated insulation level (kV peak/kV r.m.s.) .

15.12.18 Class of insulation, according to IEC 60085 and IEC 61869-2 ...........................................................

105 (A)

15.12.19 General requirements for bushing CT’s:

15.12.19.1 The secondary winding shall be wired to barrier type terminals accommodated in a control box mounted directly on transformer tank ..........................


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15.12.20 Provisions shall be made for earthing of the secondary winding inside the control box .....................

15.12.21 The bushing current transformer shall carry the markings specified in ..............................................

IEC 61869-2

15.13. EARTHING

15.13.1 The earthing shall include all the metallic parts of Earthing transformer which are normally not energized (tank, radiators, conservator, pipes, control box, etc.) .......................................................................

15.13.2 The tank must be provided with two (2) approved earth connection points on its periphery .......

15.13.3 The grounding pads shall be copper faced and marked with appropriate graphical symbols ..................

15.13.4 Rated-short time withstand current of ground pads for 1 sec. (kA r.m.s.) .............................................

4.6

15.13.5 Rated peak withstand current (kA peak) ..........

11.5

15.13.6 The maximum potential difference between any point of the equipment and the nearest ground pad or between any two points of adjacent equipment shall not exceed, for the maximum internal or external fault current (V) .....................................................................

65

15.13.7 Flanged joints provided with gaskets shall be galvanic connected .......................................................

15.13.8 All parts on the Earthing transformer cover shall be connected to the grounding terminals of the cover ......................................................................

15.13.9 The grounding of the magnetic core shall be performed according to subclause ‎15.1.12 ...................


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15.13.10 Additional grounding points shall be provided as follows:

15.13.10.1 On CT's bushing .......................................

15.13.10.2 Near to 24 KV bushings ............................

15.13.11 For grounding path continuity, grounding straps connections between cover and tank shall be provided ......................................................................

15.13.12 Manufacturer is required to supply his recommendations for earthing system and an earthing drawing ......................................................................

15.14. NAMEPLATE

15.14.1 The Earthing Transformer shall be provided with an indelibly (UV resistance) marked nameplate of suitable material including the data according to ..........

IEC

60076-6 clause 10.8

15.14.2 The nameplate shall withstand the service conditions specified under clause ‎12 and shall be durable and readable during the entire earthing transformer life duration ................................................

15.14.3 In addition the Earthing transformer Sound pressure level at no-load shall be indicated according to .........................................................................

IEC 60076-10

15.14.4 The name plate shall include also the order number and the Specification number ..........................

15.14.5 Except of the main rating plate with the information listed above, all the transformers accessories shall carry plates with identification and characteristics of the auxiliary equipment according to standards for such components (bushings, current transformer, relays, etc.) ...............................................


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15.15. DIMENSIONS AND WEIGHTS

15.15.1 Dimensions:

15.15.1.1 Height during transport (mm) ..................... ...................................................................

2800

15.15.1.2 Assembled height shall not exceed (mm) ..

2800 ©

15.15.1.3 Assembled depth (D) shall not exceed (mm) ...................................................................

2850 ©

15.15.1.4 Assembled width (W) shall not exceed (mm) ...................................................................

1450 ©

15.15.2 Shipping volume (m3) ......................................

15.15.3 Approximate weights (net):

15.15.3.1 Core (t) .......................................................

15.15.3.2 Coils (t) .......................................................

15.15.3.3 Cellulose insulation (t) ................................

15.15.3.4 Tank and fittings (t) ....................................

15.15.3.5 Oil (t) ...........................................................

15.15.3.6 Total weight shall not exceed (t) ................. 5.6 ©

15.15.3.7 Untanking weight (t) ....................................

15.15.3.8 Weight of heaviest piece to be handled (t) .

15.15.3.9 Weight during transport to site (data for loading transformer on trailer) shall not exceed (t) ......


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16. DELIVERY, PACKING, SHIPMENT AND STORAGE

Name of Contractor:

REQUIRED OFFERED

16.1 With regard to the shipment and handling of all equipment to be provided by the Contractor to the Purchaser, Contractor shall be responsible for ensuring that shipment and handling shall be wholly in conformance with the relevant Tender's commercial annexures. ......................................................................................

16.2 In addition to the provisions of the relevant Tender's commercial annexures, Contractor shall package all shipment in such manner as required to prevent any damage to the equipment during prolonged storage (2- 3 years) under the climatic and environmental conditions described under clause ‎12 .....................

16.3 Taking into account the specific climatic conditions described under clause ‎12 Manufacturer shall indicate:

16.3.1 The requirements for prolonged storage before erection ...

16.3.2 The maximum allowed storage time not energized without equipment damage (months) .........................................................

16.4 All components or accessories not included in the main shipment shall be shipped by Air Mail by Air Express or by Air Freight at Contractor’s expense. Such shipment shall be addressed as mentioned in the relevant Tender's commercial annexures. ......................................................................................

16.5 Earthing Transformer shall be shipped to Purchaser oil-filled ............................................................................................

16.6 Manufacturer shall take all necessary steps to prevent any oil leakage, both during transport to site and during operation. Such steps shall include, for example: instructions for loading transformer on trailer, instructions for ensuring protection of transformer against inertial forces in all directions during transport, instructions for unloading, etc. as well as instructions for prevention of damage during installation, instructions for prevention of damage in operation with permanent vibrations caused by working conditions, and with wind loading under dynamic conditions, etc ...................................................................

16.7 All items shall have their lifting, jacking and haulage points and safe working loads clearly marked at all stage of the delivery and the erection period. ..................................................................



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16.8 All components or accessories, shipped dismantled for field mounting or field assembly shall be suitably tagged to show identification and service. Tags shall be exceptionally durable and securely tied to items by wire or other approved methods ..............

16.9 The main shipping piece (transformer) shall be provided with shock detectors, in all directions, having an operating acceleration level of 3g ...................................................................

16.10 The spare parts and special tools shall be packed separately and a detailed packing list shall be sent ........................

16.11 Contractor shall include in the Proposal a complete schedule of parts delivered .............................................................

16.12 Contractor shall supply three (3) months before the shipment of the equipment five (5) sets of the complete Bill of Materials to enable checking and identifying of the equipment upon receipt of the same ................................................................

16.13 Contractor shall include a Bill of Materials with the shipment to enable the Purchaser to determine if all disassembled items have been received .........................................................................

16.14 Contractor shall submit detailed storage instructions for the specially designated equipment and other items, which cannot be, stored outdoors. Such information shall be available to the Purchaser in the due time to prepare the required facilities ............

16.15 Contractor shall prepare a detailed tabulation of all field mounted items with at least the following information:

16.15.1 Item number, if designated in proposal documents ..........

16.15.2 Contractor’s shop order number (if any) ..........................

16.15.3 Number of items ...............................................................

16.15.4 Manufacturer and/or supplier, if other than Contractor .....

16.15.5 Type or catalogue number, if listed .................................

16.15.6 Short description including maintenance prescriptions and full instructions for correct mounting .......................................


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16.15.7 Shipping date ...................................................................

16.15.8 Shipping details ................................................................

16.16 The Contractor will be required to undertake to arrange on behalf of the Purchaser and in consultation with and at the expense of the Purchaser for the shipment in due time of the transformer to be supplied hereunder on a vessel suitably equipped for loading the said equipment at the port of origin, for carrying the same and for unloading same at port of destination in Israel, and Contractor shall further be required to undertake to have the transformer properly stowed on the said vessel, at Contractor’s expense ......................................................................

16.17 Shipping dimensions:

16.17.1 Shipping weight of:

16.17.1.1 Heaviest piece (t) ........................................................

16.17.1.2 Dismantled parts (t) ....................................................

16.17.2 Shipping volume of:

16.17.2.1 Heaviest piece (m3) ....................................................

16.17.2.2 Dismantled parts (m3) .................................................

16.17.3 Total shipping weight (t) ...................................................

16.17.4 Total shipping volume (m3) ..............................................


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17. COMMISSIONING

Name of Contractor:

REQUIRED OFFERED

17.1 The Contractor shall be responsible for the commissioning of all equipment covered under his contract in case it will be requested by Purchaser ..................................................................

17.2 The Contractor shall prepare and submit three months prior to the start of commissioning, a Commissioning Program for approval by Purchaser ....................................................................

17.3 The Commissioning Program shall include indications for:

17.3.1 Commissioning inspection to detect faults which have occurred during transportation, storing or during assembly at its final location ...................................................................................

17.3.2 Preparation for use and procedures to describe the activities required to prepare systems for testing and operation ....

17.3.3 Checking of rated data, connection, loading, etc. of the new equipment and necessary interface with the existing equipment supplied by others ........................................................

17.3.4 Checking of indicating meters, relays, control and communications equipment and similar functions associated with the existing equipment ...................................................................

17.3.5 Checking of station auxiliaries associated with the new equipment as A.C. supply, batteries and chargers, etc..................

17.3.6 Testing as detailed in tests on site program according to APPENDIX NO. 1, including the following: - the test objective. ......................................................................... - test intent ..................................................................................... - required performance data .......................................................... - prerequisites ................................................................................ - sequence of activities .................................................................. - acceptance criteria ......................................................................

17.3.7 Putting the equipment into service ......................................

17.3.8 Final check .........................................................................

17.4 Changes and modifications to the Commissioning Program shall also be approved by Purchaser ..............................................



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17. COMMISSIONING

Name of Contractor:

REQUIRED OFFERED

17.5 Commissioning results shall be witnessed by the Purchaser and documented on forms to be agreed upon by the Contractor. The record shall include other such as omissions or unsatisfactory test results ......................................................................................

17.6 The Contractor shall maintain an up-to-date record of all inspections and tests, which shall be handed over to the Purchaser at the completion of the site testing and commissioning

17.7 The Contractor shall be responsible for making available to Purchaser a minimum of two (2) complete sets of marked-up “as built” drawing before leaving the site. Contractor shall correct and reissue the original drawings as soon as possible ..........................

17.8 The Purchaser shall be responsible for the connection and disconnection of the new equipment to and from system, including first energization of new equipment, but with the advice and technical assistance of the Contractor (if required) .........................

17.9 The Contractor shall be responsible for supplying commissioning personnel with a good knowledge in all relevant operations prior and for commissioning and will be requested to submit a list giving name, experience and proposed duration on site ..............................................................................................

17.10 The Contractor shall be responsible for safety of personnel (ours or his own) involved in commissioning and shall take all possible precautions and be fully aware of the dangers involved in testing .............................................................................................

17.11 Contractor’s personnel shall also be ensured against death and personal accident and health while in Israel and be covered by Employers Liability Insurance applicable in their country of origin ..............................................................................................

17.12 Major failure or damage to equipment will require either its return to the factory or assignment of a special crew to carry out repairs .............................................................................................

17.13 Minor failure as failures in metering, relaying control and communications equipment shall be repaired by commissioning personnel ........................................................................................


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17. COMMISSIONING

Name of Contractor:

REQUIRED OFFERED

17.14 All expensive (including transport to factory and return) in connection with damages and repairs as described above shall be paid by Contractor ......................................................................


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18. QUALITY CONTROL, RELIABILITY, MAINTENANCE AND INSPECTION

Name of Contractor:

REQUIRED OFFERED

18.1. QUALITY CONTROL

18.1.1 A mutually agreed Inspection Plan, including witness and hold points, shall be agreed between Purchaser and Contractor. Any subsequent alternation to his program shall require the Purchaser’s agreement, prior to start to any work affected by these alternations ..........................................................................

18.1.2 Test and Inspection certificates as required in the Specification and the applicable Standards, shall be submitted immediately following their generation. The certificates shall be original, signed by Contractor and contain actual measured values. The generation of certificates, including those generated by Subcontractors and sub-suppliers, shall bear no extra cost to Purchaser ......................................................................................

18.1.3 Any equipment non-conformance to drawings, Specification or other purchase order requirements shall by solved according to the terms and requirement included in APPENDIX No. 9 “PROCEDURE FOR HANDLING NON-CONFORMANCES” .......................................................................

18.1.4 All materials used in the manufacture of the equipment shall conform to the Specification, approved drawings and accepted Standards .......................................................................

18.2. RELIABILITY, MAINTAINABILITY AND SAFETY (RMS)

18.2.1 The Contractor shall submit with the proposal failure statistic for installed earthing transformer .......................................

18.2.2 The Contractor shall state the minimum guarantee MTBF including confidence level. Contractor shall indicate the methods by which the MTBF values were determined and shall submit supporting data ...............................................................................

18.2.3 Service life expectancy of the equipment and possible performance degradation with time, defined in quantitative terms ..

‎

18.2.4 The Contractor shall furnish suggested actions to prevent recurrence of component failure .....................................................



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18.2.5 Together with the Earthing Transformer offer, the Contractor is requested to submit the filled in APPENDIX NO. 4 "Reliability, Maintainability, Safety (RMS)” .....................................

18.2.6 The Contractor shall submit the correct RMS data and information about the proposed Earthing Transformer written in the RMS questionnaire ..................................................................

18.2.7 The Manufacturer shall notify the Purchaser, without any undue delay, of any defect failure, malfunction or incompatibility in the equipment, or in similar types of equipment, which shall have appeared, or discovered in the course of the period, extending from the execution of the Contract of supply until three years after the expiration of the warrantee, in as much as it affects or may affect the use, performance, qualities, lifetime, or safety of the equipment ....................................................................................... The notification shall be in writing and shall specify the nature of the defect, failure, malfunction, or incompatibility, any ramifications, stemming therefrom and any relevant corrective measures, adopted or recommended by the Manufacturer ............

18.2.8 The proposed Earthing Transformer will participate in the Reliability Field Demonstration (RFD) specified in APPENDIX NO. 4 and the Contractor will be responsible for consequences of this RFD .....................................................................................

18.2.9 The Contractor representative shall participate in Failure Review Board .................................................................................

18.3. MAINTENANCE AND INSPECTION

18.3.1 All mechanical couplings, contacts, and other mechanisms shall be pre-adjusted and tested at the factory so that no such work is necessary in the field ....................................

18.3.2 Specify which individual part shall be adjusted, regulated or tested in the field before and during assembling .......................

18.3.3 Indicate adjustment methods, tolerances, etc. for operation under subclasses ‎18.2.5 and ‎18.2.6 .............................

18.3.4 Necessary maintenance work (please indicate details) ......


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18.3.5 Number of months (operations) under normal service conditions between successive checking of:

18.3.5.1 Oil tightness .................................................................

18.3.5.2 Oil levels ......................................................................

18.3.5.3 Oil proprieties:

18.3.5.3.1 Breakdown strength .................................................

18.3.5.3.2 Dielectric losses .......................................................

18.3.5.3.3 Neutralization number ..............................................

18.3.5.3.4 Gas content in oil .....................................................

18.3.5.4 Valve position ..............................................................

18.3.5.5 Buchholz relay operation .............................................

18.3.5.6 Accessories operation..................................................

18.3.5.7 Insulation of wiring .......................................................

18.3.5.8 Dielectric dissipation factor tan. ................................

18.3.5.9 Insulation resistance and polarization index ................

18.3.5.10 Active parts ..................................................................

18.3.6 Number of months between successive cleaning, painting and rust proofing of metal parts .....................................................

18.3.7 Numbers of months between successive cleaning of bushings and apparatus cubicle ....................................................

18.3.8 Length of time under service conditions before an overhaul is required .......................................................................

18.3.9 Expected man-hours required for periodical inspection and maintenance (hours) ...............................................................

18.3.10 Manufacturer shall ensure spare parts for earthing transformer for a period of life duration ..........................................


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18.3.11 The earthing transformer shall be designed for live washing (automatic and manual) taking into account service conditions described under clause ‎12 in this Specification ............


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19. TECHNICAL DOCUMENTS TO ACCOMPANY THE PROPOSAL

Name of Contractor:

REQUIRED OFFERED

The following technical documents shall accompany the proposal:

19.1 All data and descriptive material shall be in English or Hebrew. Indicate for all requirements, number of drawing, catalogues or documents ................................................................

19.2 Description of the principles of operation of the Earthing Transformer under operating conditions .........................................

19.3 Description of arrangement of windings and core (location of windings relative to the core) ......................................................

19.4 Dimension drawings giving principal dimensions ..................

19.5 Cross section through core and windings as well as through core window with windings installed, indicating clearances between windings of different phases, to core etc. with details of insulating materials, size of insulation to core and areas with strengthened insulation ...................................................................

19.6 Description of oil preservation system ..................................

19.7 Technical data of oil and oil test report .................................

19.8 Complete description of radiators including metal coating, painting and test reports .................................................................

19.9 Wiring diagram ......................................................................

19.10 Drawing and description of air drain system .........................

19.11 Description and drawing of control box and list of all measuring control and protective relaying equipment included in control box ......................................................................................

19.12 Description of protection devices and their connection diagram ...........................................................................................

19.13 Drawings and technical data for the bushings ......................

19.14 Description, cross section, wiring diagram and drawings of bushing CT .....................................................................................



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19.15 Drawing of the nameplate .....................................................

19.16 Information about design of structures and foundation .........

19.17 Drawings of transformers anchoring for anti-seismic purposes .........................................................................................

19.18 Information about design of structures and foundation .........

19.19 List of accessories and fittings with short description, technical data and catalogues ........................................................

19.20 The Contractor shall include any other drawings, catalogues, descriptions and photographs necessary to present a clear picture of the type and class of equipment being submitted ...

19.21 Example of final factory tests report ......................................

19.22 Example of routine tests report for offered type ....................

19.23 Type test report (authority, number and date) for offered type, including test circuit, instruments used and description of method. We are interested in test values for offered type of transformer as supplied to various customers (routine and type test) ..............................................................................................

19.24 Short-circuit test reports for similar transformer delivered by the Contractor in the past ................................................................

19.25 Accessories (bushings, CT, Pressure Relief Device, etc.) type tests ........................................................................................

19.26 Manufacturer’s requirements for:

19.26.1 Prolonged storage (2-3 years) before erection, taking into account the specific conditions under clause ‎12 ............................

19.27 Transport on roads and on site .............................................

19.28 Reliability and Maintainability report .....................................


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19.29 Manufacturer is requested to fill in the enclosed APPENDIX NO. 4 "Reliability, Maintainability Safety (RMS) based on relevant information from users. Manufacturer shall describe the system of relevant data collection from users .................................................

19.30 A list of all transformers external metal parts including the base of the transformers which shall be painted and detailed painting specification and painting instructions as paint name, paint generic family (polyurethane, epoxy, etc.), compatible international standards, Manufacturer name, technical sheet, etc. .

19.31 General instruction books for erection, operating and maintenance .The instruction books shall include for all equipment supplied within the contract all technical information, drawings, diagrams and prescriptions required for:

19.31.1 Assembly on site ..............................................................

19.31.2 Commissioning and site testing ........................................

19.31.3 Operation ..........................................................................

19.31.4 Maintenance .....................................................................

19.31.5 Checking ...........................................................................

19.31.6 Overhauls, repairs ............................................................

19.31.7 Dismantling .......................................................................

19.31.8 Information for ordering renewal parts ..............................

19.31.9 Indication for storage before erection under the environmental conditions as specified in clause ‎12 .......................

19.31.10 Technical data for all the equipment supplied within the Contract ........................................................................................

19.32 Customer list for the last five years with summation for each year (number of units, technical data, date of supply, Purchaser) .

19.33 A list of all items to be shipped separately for field assembly


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Name of Contractor:

REQUIRED OFFERED

19.34 A list of recommended special tools and instruments necessary for assembling and disassembling of the Earthing Transformer ....................................................................................

19.35 A list of necessary accessories for lifting ..............................

19.36 A list of recommended spare parts (including total quantities and number of catalogue) for the amount of the Earthing Transformers indicated in this Specification ..................... The above list shall also include one bushing .................................

19.37 A list of all parts which could wear out after 5 years, 10 years and 20 years of operation according to Manufacturer or users experience.............................................................................

19.38 A list of all gaskets and sealing rings including location, dimensions, number of catalogue, resilience properties and duration of conservation in storage without loss of qualities ...........

19.39 A list of all bolts used, including dimensions, number of catalogue, material, type of thread, maximum torque for fastening

19.40 Instruction concerning disassembly and end of life procedures for different components of the equipment (composition, weight, toxicity etc) ...................................................

19.41 A valid certificate demonstrating certification to ISO 9001:2008 granted by a Certification Body (CB) as indicated in clause ‎7 ..........................................................................................

19.42 Details about environmental management system (EMS) according to ISO 14001:2004 .........................................................

19.43 An environmental product declaration (EPD) approved and certified by an accredited certification body. The calculation will take into consideration the requirements for EPD acc. to ISO 14025:2006 ..........................................................

19.44 A copy of Contractor's Quality Manual and specific QMS (Quality Management System) Procedures as required by the Purchaser .......................................................................................


B - 80


Name of Contractor:

REQUIRED OFFERED

19.45 Quality plan ...........................................................................

19.46 The Contractor shall submit with his proposal a preliminary Inspection and Test Plan (I&T Plan) ...............................................

19.47 Acceptance test procedures for material and subsystems

19.48 Inspection and test procedures .............................................

19.49 Non-conformance and corrective action procedures ............

19.50 Design Control Procedures ...................................................

19.51 Qualification of Subcontractor’s Procedure ...........................

19.52 List of qualified suppliers of the most important parts and components (as applicable) ............................................................

19.53 A list of optional items ...........................................................

19.54 Contractor's declaration that his specialists will participate in all the meetings required by the Purchaser in Israel, during the technical clarifications as well as during the transformer entire life duration ...........................................................................................

19.55 Contractor shall supply, after order, an electronic media with details about transformer, safety rules for handling, maintenance procedures, test etc. .................................................. Contractor shall ensure the training course for Israel Electric Corporation operating and erection people taking into account the above mentioned aspects ...............................................................


B - 81

20. TECHNICAL DOCUMENTS AFTER NOTIFICATION OF AWARD

Name of Contractor:

REQUIRED OFFERED

20.1 After notification of award, Contractor shall, within 30 days of the date of award, submit to the Purchaser for approval five (5) complete sets of prints of drawings and one (1) electronic media copy, covering the following information:

20.1.1 Outline drawings of Earthing Transformer complete with all accessories, including all necessary details for mounting, such as fixing holes, weight, major dimensions, permissible static and dynamic forces...............................................................................

20.1.2 Cross section of ready assembled Earthing Transformer, showing inner arrangement ...........................................................

20.1.3 Details of skid base, provisions for blocking the transformer after it’s installation, coolers, bushing terminals, anti-seismic fixations, etc ......................................................................

20.1.4 24 KV connection schemes ................................................

20.1.5 General dimensions and wiring diagram of control box ......

20.1.6 Connection diagram of protection devices ..........................

20.1.7 Wiring diagrams of all accessory equipment furnished with the transformer, including connections and software specifications .................................................................................

20.1.8 Description of size and location of ground connectors for earthing transformers and control box ...........................................

20.1.9 Nameplate ........................................................................

20.1.10 Contractor shall submit six (6) months prior to the shipment the authorization documents of the welding procedures used during manufacture in the factory and in the field, as well as the qualification documents of the personnel that has performed the welding processes in the factory ..............................................

20.1.11 Contractor shall mail before shipment of the equipment, relevant test and the shop inspections reports ..............................

20.1.12 Size and location of main terminal connections ................



B - 82


Name of Contractor:

REQUIRED OFFERED

20.1.13 Description and bushing drawing from insulator Manufacturer Test report shall be given ........................................

20.1.14 Main and secondary electrical connection schemes for all accessories and locations of conduit entrance for secondary connections. ..................................................................................

20.1.15 Drawings and test reports of all bushings and bushing insulators .......................................................................................

20.1.16 Details of base, coolers, terminals ....................................

20.1.17 A list of all gaskets and sealing rings including location, dimensions, number of catalogue, resilience properties and duration of conservation in storage without loss of qualities ..........

20.1.18 Shipping assembly drawing with overall size and weight..

20.1.19 Painting specification procedures for approval including: surface preparation procedures, application procedures, materials (paints and metal coating), technical data sheets, details about protecting of problematic places (special thickness, strip coats), quality control procedures and case history of the paint system...................................................................................

20.1.20 Final list of all subcontractors and sub-suppliers including name, address and a copy of their Quality Assurance certificates.

20.1.21 Instructions manuals, technical directives, drawings and any other relevant descriptive materials which shall contain all information required for the mounting, commissioning, operation, maintenance, periodic checking, periodic testing and repair of Earthing Transformers ...................................................................

20.2 The drawings of Earthing transformers base shall include the following information:

20.2.1 Arrangement and size of the base members ....................

20.2.2 Width and length of each bearing member .......................

20.2.3 Load on each bearing member .........................................

20.2.4 Center of gravity of loads ..................................................


B - 83


Name of Contractor:

REQUIRED OFFERED

20.2.5 Location of jacking points .................................................

20.2.6 Center line distance between piers ...................................

20.2.7 Number of piers ................................................................

20.2.8 Manufacturer is free to supply any additional information considered necessary for clarifying various aspects of Earthing transformers performance, operation, maintenance, etc ...............

20.2.9 Purchaser reserves himself the right to require all necessary additional data, descriptions, drawings, etc. that may contribute in completing information supplied by Manufacturer about the Earthing Transformers ...................................................

20.2.10 In case of Purchaser's remarks, changes or additional requirements regarding the aforementioned provided documentation, the Contractor shall make corrections per Purchaser's demands and shall resubmit required copies (as stated above) of the updated documents. The process will be continued until the completion of approval of all aforementioned documentation ...............................................................................

20.2.11 After engineering of the Earthing transformers the Manufacturer is requested to submit to Purchaser for approval, a design review according to APPENDIX No. 10 .............................

20.2.12 After approval of the above drawings, Contractor shall submit to the purchaser for approval four (4) hard copies and 1 (one) electronic media copy that includes: sets of complete instruction books as may be required for erecting, operating and maintaining the equipment .............................................................

20.2.13 The instruction books shall include:

20.2.13.1 Storage before erection and Spare Parts storage requirements.................................................................................

20.2.13.2 Technical data for all the supplied equipment .............

20.2.13.3 Assembly on site.........................................................

20.2.13.4 Commissioning and site testing ..................................

20.2.13.5 Operation and loading guide .......................................


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Name of Contractor:

REQUIRED OFFERED

20.2.13.6 Maintenance schedule ................................................

20.2.13.7 Dismantling .................................................................

20.2.13.8 Overhauls, repairs ......................................................

20.2.13.9 Software package Specifications for all accessories ..

20.2.13.10 Recommended detailed procedures for commissioning and periodic testing and all pertinent test reports.

20.2.13.11 Weight and type of insulation for DGA evaluation purposes:

20.2.13.11.1 Paper of 24KV winding (kg/type) ..........................

20.2.13.11.2 Side plates (kg/type) ............................................

20.2.13.11.3 Core plates (kg/type) ............................................

20.2.13.12 Recommendations for earthing system and an earthing drawing ...........................................................................

20.2.13.13 Such drawing lists, performance tests curves, lists of parts, etc. as may be required to give Purchaser complete information for the ordering of spare parts ....................................

20.2.13.14 After approval of the above drawings and instruction books, but not less than 2 months before delivery date, Contractor shall submit to the Purchaser the following:

20.2.13.14.1 1 (one) set of prints of all drawings and 1 (one) electronic media copy with the files of those drawings in DWG format .............................................................................

20.2.13.14.2 6 (six) hard copies and one Electronic media copy of complete instruction books as may be required for erecting, operating, and maintaining equipment ..........................

20.2.13.15 All descriptive materials (lists, instruction books, etc.) shall be numbered and dated for easy identification and reference purposes .......................................................................

20.2.13.16 All data and descriptive material in the above drawings and instruction books shall be in English or Hebrew. All dimensions shall be shown in metric units ....................................


B - 85


Name of Contractor:

REQUIRED OFFERED

20.2.13.17 In addition to the drawing requirements, Contractor shall furnish a comprehensive outline as to the extent of field fabrication required and as to all temporary wiring, disassembling, reassembling, welding, cleaning, checking, inspection, painting, testing, etc., required to be done by the Erector ....................................................................................

20.2.13.18 Contractor shall provide one (1) electronic media copy of Quality Assurance Manual including a full description of Contractor’s Quality assurance program ......................................

20.2.13.19 Contractor shall furnish the following also the Quality Control documentation 60 days after contract signing:

20.2.13.19.1 Inspection and Test Plan included in Contractor’s Quality Plan .............................................................................

20.2.13.19.2 Quality Control Procedures ..................................

20.2.13.19.3 Electrical testing Procedures as per applicable Standards .............................................................................

20.2.13.20 Non-conformance’s Procedures .................................

20.2.13.21 Routine, type and special test reports as well as the tests for components (bushings, CT, etc.) shall be submitted for approval, one month before delivery, in 4 (four) hard copies and 1 (one) electronic media copy. The shipment can not be realized before test approval ......................................................................

20.2.14 Commissioning program shall be supplied for approval in 4 (four) hard copies and 1 (one) electronic media copy, three (3) months before delivery ..................................................................

20.2.14.1 All documents and drawings shall be provided with:

20.2.14.1.1 Purchaser’s name ................................................

20.2.14.1.2 Station or project name ........................................

20.2.14.1.3 Unit number..........................................................

20.2.14.1.4 Purchaser’s order number ....................................

20.2.14.1.5 Supplier’s order number .......................................


B - 86


Name of Contractor:

REQUIRED OFFERED

20.2.14.1.6 "For Information": Design Control Procedures (as applicable) .............................................................................


B - 87

21. COMMENTS BY MANUFACTURER ON ANNEXURE “B” AND SUMMARY OF DATA

Name of Contractor:


B - 88

22. FOLLOW-ON ENGINEERING AND SUPPORT AFTER PURCHASE

Name of Contractor:

REQUIRED OFFERED

22.1 The Manufacturer shall conduct a Follow-On Support Program after the expiration of the warranty period ........................

22.2 The Program shall be defined under this paragraph and shall consist of:

22.3 Telephone and written consultation ......................................

22.4 Assistance, troubleshooting, consultation at Purchaser’s facilities ...........................................................................................

22.5 Participation in all the meetings required by the Purchaser in Israel, during the technical clarifications as well as during the Earthing transformers entire life duration ........................................

22.6 Automatic submissions of updates and corrections to manuals, drawings, catalogues, specifications, reliability data and all other documentation provided under this and subsequent contract ...........................................................................................

22.7 Repair of systematic failures, design defects and latent defects, performing retrofits and updating of relevant documentation ................................................................................

22.8 Repair services for the equipment, its subassemblies, modules and cards .........................................................................

22.9 Automatic submissions of updates and corrections to software. Update modules shall be field tested and validated by Manufacturer ..................................................................................

22.10 Notifications of new functions, applications or other software were becoming available for incorporation in Purchaser’s System. The Manufacturer shall propose such software and its integration upon Purchaser’s request ...........................................

22.11 Follow-on supports services shall be provided for the full lifetime period duration of the equipment ......................................

22.12 The Contractor shall define his Follow-On Support Program under this paragraph, and shall include terms and conditions for its performance, as well as his proposed procedures .....................


B - 89

23. DEVIATIONS FROM REQUIREMENTS

Name of Contractor:

Manufacturer is requested to describe or indicate deviations of the equipment and accessories from all requirements in this Specification. ............................................

In case no deviations are mentioned it will be understood that Manufacturer’s offer entirely complies with all requirements in this Specification. .....................................


B - 90

24. CONFORMITY WITH PROPOSAL DOCUMENTS

Name of Contractor:

Contractor 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. ............................................................................................

Contractor’s printed terms and conditions are not considered specific exceptions. Any exceptions, which Contractor has taken, are listed on page B - 87. ...................

Contractor 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 Contractor

Date of Proposal


B - 91

APPENDICES


B - 92

APPENDICES:

No. 1 : TESTS AFTER ERECTION ON SITE

No. 2 : SPECIFICATION NO. 50/2013 FOR MINERAL INSULATING OIL

SUPPLIED FOR/WITHIN NEW ELECTRICAL EQUIPMENT

No. 3 : SPECIFICATION EPD-A.03 FOR CONTROL CUBICLES –

ELECTRICAL WIRING REQUIREMENTS

No. 4 : RELIABILITY, MAINTAINABILITY, SAFETY (RMS) AND

UNRELIABILITY DEMONSTRATION PROCEDURE

No. 5 : SPECIFICATION 2009-217-141707 - TRANSFORMERS PAINTING

No. 6 : REPORT OF SOUND PRESSURE/INTENSITY LEVEL

MEASUREMENT AND SOUND POWER CALCULATION

No. 7 : SPECIFICATION NO. 804 FOR SELF INDICATING ORANGE-WHITE

SILICA GEL COBALT FREE FOR USE AS DESICCANT IN

TRANSFORMER AIR DEHYDRATORS

No. 8 : CONTRACTOR’S TECHNICAL PERFORMANCE GUARANTEES

No. 9 : PROCEDURE FOR HANDLING NON-CONFORMANCE

No. 10 : DESIGN REVIEW FOR TRANSFORMER ENGINEERING

No. 11 : SPECIFICATION Q - APP – 02: QUALITY REQUIREMENTS


B - 93

APPENDIX NO. 1

TESTS ON SITE

1. Verification of shock detectors,

2. Verification of general mounting.

3. Verification of oil tightness at a pressure of 0.2 bar,

4. Measurement of winding resistance,

5. Verification of transformer insulation resistance,

6. Verification of capacitance and dielectric dissipation factor,

7. Verification of oil dielectric breakdown voltage,

8. Verification of auxiliary circuits insulation resistance,

9. Verification of correct wiring,

10. Testing of auxiliary circuits: automatic and manual operation, alarm and tripping,

11. Adjustment of thermic and time relays,

12. Verification of thermostats (adjustment and operation),

13. Verification of protections,

14. Verification of bushing current transformer,

15. Verification of valves and flaps position,

16. Verification of oil levels and silicagel air dryers,


B - 94

APPENDIX NO. 2


B - 95


B - 96


B - 97


B - 98


B - 99


B - 100

B - 101

APPENDIX NO. 3

B - 102

B - 103

B - 104

B - 105

B - 106

B - 107

B - 108

B - 109

B - 110

B - 111

B - 112

B - 113

B - 114

APPENDIX NO. 4

Reliability, Maintainability and Safety (RMS) Requirements

Important Notes:

(1) For the RMS definitions please refer to Paragraph. 4 of this Appendix

(2) The Contractor is required to react on each and every one of the following

paragraphs.

(3) Please copy each paragraph of the following requirements into your

reaction document and write your reaction right after each paragraph, using a

different font.

(4) In case of a lack of information/data, please write “No information/data

available”.

B - 115

1.Requirements

I.E.Co. requires an Earthing Transformer (ET) for 161kV Substations, in Israel, as described in Annexure

“B” of Technical Specification. The following Reliability, Maintainability and Safety (RMS) requirements

shall characterize the new ET.

1.1.Reliability

The Contractor shall improve the design and manufacture to the most possible higher reliability of the ET,

to achieve a very high Mean Time Between Failures (MTBF), and Expected Operating Life (EOL).

Bidder Reaction:

1.2.Maintainability

1.2.1.Maintenance Policy

There will be 3 maintenance levels for the ET:

1.2.1.1.Level “O” (Organizational): At I.E.Co.’s site, by I.E.Co.’s technicians. At this level only removing

and replacing of a faulty part and test of the entire ET will be allowed.

Bidder Reaction:

1.2.1.2.Level “I” (Intermediate): At I.E.Co. Laboratory in Israel. In case of necessary more

complicated maintenance action than in Level “O”, the ET should be transferred to be repaired at this

level.

Bidder Reaction:

1.2.1.3.Level “D” (Depot): At Contractor’s representative Laboratory in Israel. In this level,

any maintenance action that could not be performed in level “I” should be performed here.

Bidder Reaction:

1.2.2.Contractor’s trained I.E.Co.’s technicians will perform all maintenance actions under

I.E.Co.’s responsibility using contractor’s supplied documentation, and I.E.Co.’s standard tools

and test equipment. If special tools or special test equipment will be required, the Contractor will

supply them.

Bidder Reaction:

1.2.3.Preventive Maintenance and Periodical Checks

B - 116

I.E.Co. will perform Preventive Maintenance and Periodical Checks every 2 Years in accordance with

contractor instructions.

Bidder Reaction:

1.2.4.Corrective Maintenance

1.2.4.1.Level “O”

The Mean Time To Repair (MTTR) of the installed ET at level “O”, including checks will be less then 1 day.

Bidder Reaction:

1.2.4.2.Level “I”

The MTTR of the installed ET at level “I”, including checks will be less then 2 weeks.

Bidder Reaction:

1.2.4.3.Turn Around Time

The Turn Around Time for any Maintenance Action will be in accordance with contract requirement

(See Paragraph 2.5).

Bidder Reaction:

1.3.Safety

The Contractor shall design and manufacture his ET for I.E.Co. in such a manner that it shall not endanger

in any way any human being, neither property, nor it causes any environmental damage. For achieving this

requirement, the Contractor is required to use the most advanced engineering, and Safety Standards

Bidder Reaction:

2.Information/Data

2.1.Reliability

The Contractor shall evaluate the Reliability parameters: MTBF and EOL of the ET and write them in table

1 in Paragraph. 2.4.1.

Bidder Reaction:

B - 117

2.2.Failure Reporting Analysis and Corrective Action report (FRACAS)

The Contractor will implement an effective Failure Reporting Analysis and Corrective Action System. In case of a failure the Contractor will register the failure in a Logbook, with the following details:

- Date of occurrence.

- Failure description.

- Operating time to failure.

- Failure root cause.

- Failure end effect (consequence).

- Failure classification (relevant/Non-Relevant).

- Time to repair

- Corrective action

Bidder Reaction:

2.3.Maintainability

The Contractor shall evaluate his maintainability parameters: MTTR, MTBPC, MTBPM and write them in table 1 Paragraph. 2.4.1. (See the meaning of the above mentioned terms below Table 1).

Bidder Reaction:

2.4.RMS Data

2.4.1.Contractor Declaration:

The Contractor shall declare the following RMS parameters:

Table 1: RMS Parameters

Parameter Declared Value

MTBF (Yrs.)

EOL (Yrs.)

MTTR (Hrs)

MTBPC (Yrs.)

MTBPM (Hrs.)

Safety measures and standards:

B - 118

Where:

MTBF – Mean Time Between Failures

MTTR – Mean Time To Repair

EOL – Expected Operating Life

MTBPC – Mean Time Between Periodical Checks

MTBPM – Mean Time Between Preventive Maintenance

2.4.2.Field Demonstration RMS data

In Addition to the RMS data mentioned above, Contractor shall submit also the following historical

information and data of his proposed ET. Please fill the information in the following table No. 2.

Table 2: Field Historical RMS Data for ____________________ Model ____________

Year 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Total No. of supplied ETs

Total No. of returns/ repairs due to defects/ faults/ failures/ errors

No. of Failures due to wrong design.

No. of Failures due to faulty production

No. of Failures due to bad use/handling

No. of Random failures

2.5.Spare Parts

B - 119

Contractor shall present the method he is using to identify the needed spare parts and their quantities for

his offered ET’s, and submit his recommendation list for these spare parts items.

The following parameters should be considered for each spare part.

(1) Failure rate.

(2) Quantity in the ET.

(3) Quantity of ETs in this order

(4) Cost.

(5) Turn Around Time.

(6) Required Spare Parts availability.

Bidder Reaction:

2.6.Safety

Contractor shall indicate how he assures that his ET cannot cause any safety hazards at I.E.Co. He must

clearly mention what safety measures, and standards he used during Design, production, and tests.

Contractor shall write them in Paragraph. 2.4.1.

Bidder Reaction

3.Demonstration/Tests

3.1.Purpose

The ET that will be supplied by the Contractor to the I.E.Co. will be participating in an “Unreliability Field

Demonstration” (UFD), in order to verify if they do not stand the MTBF declared by the Contractor.

I.E.Co.. will accept the ET, only after successful completion of the UFD namely when the test ended with

ACCEPT decision.

Bidder Reaction:

3.2.Principles

3.2.1.I.E.Co. will prepare the UFD Plan for the ET and implement it. The calendar UFD time will be 2

years. No relevant failures should be allowed. In case of 1 (one) or more relevant failures that occurred

during the UFD, the UFD will be ended with a REJECT decision.

Bidder Reaction:

B - 120

3.2.2.The Contractor does not have to invest any resources to the UFD, except to participate in the FRB.

However the Contractor shall assume full responsibility to the results and the consequences of the UFD.

For the purpose of the UFD, the Contractor should:

- Use suitable design to meet specifications.

- Select proper components, and parts.

- Use proper production processes.

- Apply rigorous Quality Control procedures.

Bidder Reaction:

3.2.3.Getting a “REJECT” result in the UFD will be considered as Contractor’s noncompliance with the

ET specification.

Bidder Reaction:

3.3.Penalties

If the UFD is terminated in “Reject” decision, Contractor will expend his Warranty Period for failures to a total

period of five (5) years. In such a case the Contractor will assume full responsibility for direct repair/replace

costs attributed to failures since the beginning of the Warranty Period, without any cost to I.E.Co.

whatsoever.

Bidder Reaction:

4.RMS Definitions

The following definitions are valid for all Reliability, Maintainability and Safety (RMS) purposes in the

specification for the Earthing Transformer. The RMS parameters are characteristics of the ET design and

production only, when they are properly used and maintained.

(1) Failure

A Failure is any event where an ET ceased functioning, or functions outside of its specification limits, and

requires a repair/replacement.

(2) Non Relevant Failure

A Non-Relevant failure for the purpose of the Failure Review Board (FRB) is a failure that was classified

by the FRB as such failure caused by:

- Bad handling, storage, transportation, or installation in I.E.Co.

B - 121

- Test Equipment.

- External Force like: lightning, earthquake, abnormal storm, etc.

- Sabotage, or terror.

(3) Relevant Failure

A relevant failure for the purpose of the UFD is any failure that could happen in real life, but could not be

characterized as “non-relevant”.

(4) Failure Review Board

A Failure Review Board (FRB) is the only official, and authorized body entitled to decide about failure

matters, especially about failure classification as “Relevant", or "Non Relevant”, to the UFD, The

Contractor will be represented in the FRB.

(5) Design Defect

Design Defect is a defect in an ET that results from inadequate/error in the design process. It may stay latent for some time, causing later a Systematic Failure.

(6) Failure Rate

The failure rate, of an ET is the number of failures per operating time unit.

(7) MTBF

MTBF is the mean operating time between failures of ET. In case of constant failure rate MTBF = 1/.

(8) Reliability

Reliability is a design characteristic defining the ability of an ET to perform satisfactorily. Therefore, ET

reliability is the probability that an ET will perform without failures, for a pre-defined period of time, when

used under stated conditions (in I.E.Co.’s customer site). MTBF is a reliability parameter.

(9) Life Length

The life length of an ET is the time until the accumulated repair cost sum up to the half of the price of a

new one.

(10) Maintenance

Maintenance is any action taken by technical staff to:

- Restore a faulty item to its operable condition after a failure, or:

- Preserve the operable, or safety condition of a good item, or:

- Test the operable condition of an item.

(11) Maintenance Levels (echelons)

- Level “O” (Organizational): Performed on the ET at I.E.Co. site by I.E.Co. technical staff.

- Level “I” (Intermediate): Performed on the ET at I.E.Co. shop by I.E.Co. technical staff close to the installation site of the ET.

- Level “D” (Depot): Performed on the ET at Contractor’s shop for execution of complicated repairs, or maintenance, that couldn’t be performed at “O”, or “I” Levels.

(12) Corrective Maintenance

B - 122

Corrective Maintenance (CM), or repair, is the maintenance action carried out on an item of the ET, after failure recognition, and intended to put the item back into a state in which it can perform again its required function satisfactorily, (during the UFD no failures are allowed).

(13) Preventive Maintenance

Preventive Maintenance (PM) is the maintenance actions carried out on a good item, at predetermined intervals, or in accordance with prescribed criteria, and intended to reduce the probability of a future failure, or degradation of the functioning of the item.

(14) Maintenance Policy

Maintenance Policy is a description of the interrelationship between the maintenance levels (echelons), the indenture levels of the ET, the levels of maintenance to be applied for the ET’s, and the required resources.

(15) MTTR

MTTR is the mean time required to perform a repair (including checks) or replace of an ET. The MTTR is given for the maintenance O, and I levels.

(16) Maintainability

Maintainability is a design characteristic defining the ability of an ET to be restored quickly to its operable condition after a failure. Therefore, ET maintainability is the probability that a failed ET is restored to its functioning condition, within specified period of time, under stated condition, using stated procedures (defined by the Contractor), and resources (defined by the I.E.Co.). MTTR is a maintainability parameter.

(17) I.E.Co.

Israel Electric Corporation

(18) IEC

1.1. International Electrotechnical Commission

B - 123

APPENDIX No. 5

B - 124

B - 125

B - 126

APPENDIX No. 6

Report of Sound Pressure/Intensity Level Measurement and Sound Power Calculation

Table No. 1: The Averaged Sound Pressure/Intensity Level, measured at a distance of 2 meters:

- Frequency range 1610,000Hz - The cooling system operated

Eq

uip

me

nt

Op

era

tion

Transformer operating conditions

Energized at: - Rated voltage

- No load

- Rated freq.

Energized at: - Impedance voltage

- Rated current

- Rated freq.

Not energized

Tap position

So

un

d p

ressu

re/in

ten

sity leve

ls a

t 1

/3 o

cta

ve

ba

nd f

requ

ency (

dB

/Hz)

16

20

25

31.5

40

50

63

80

100

125

160

200

250

316

400

500

630

800

1000

1250

1600

2000

2500

3150

4000

5000

6300

800

10000

Overall Sound Pressure/Intensity Level, dBA weighted

B - 127

B - 128

Table No. 2: The Averaged Sound Pressure/Intensity Level, measured at a distance of 0.3 meters:

- Frequency range 1610,000Hz - The cooling system not operated

Eq

uip

me

nt

Op

era

tion

Transformer operating conditions

Energized at: - Rated voltage

- No load

- Rated freq.

Energized at: - Impedance voltage

- Rated current

- Rated freq.

Tap position

So

un

d p

ressu

re/in

ten

sity leve

ls a

t 1

/3 o

cta

ve

ba

nd f

requ

ency (

dB

/Hz)

16

20

25

31.5

40

50

63

80

100

125

160

200

250

316

400

500

630

800

1000

1250

1600

2000

2500

3150

4000

5000

6300

800

10000

Overall Sound Pressure/Intensity Level, dBA weighted

B - 129

Table No. 3: The Calculated Sound Power Level:

- Frequency range 1610,000Hz

- The cooling system operated/not operated

Eq

uip

me

nt O

pe

ratio

n Transformer

operating conditions

Energized at:

- Rated voltage

- No load

- Rated freq.

Energized at:

- Impedance voltage

- Rated current

- Rated freq.

Energized at:

- Rated voltage

- Rated current

- Rated freq.

Not energized

Cooling system

operated Not

operated operated

Not operated

operated Not

operated operated

Tap position

So

un

d p

ow

er

leve

ls a

t 1/3

octa

ve

ba

nd f

requ

ency (

dB

/Hz)

16

20

25

31.5

40

50

63

80

100

125

160

200

250

316

400

500

630

800

1000

1250

1600

2000

2500

3150

4000

5000

6300

800

B - 130

10000

Overall Sound Power Level, dBA weighted

B - 131

APPENDIX No. 7

B - 132

B - 133

B - 134

APPENDIX No. 8

CONTRACTOR’S TECHNICAL PERFORMANCE GUARANTEES

When during testing it is shown that the no load losses exceed the guaranteed

level plus tolerances, the Contractor shall pay the IECo liquidated damages as

follows:

1. For each transformer unit that the no load losses exceed the guaranteed level

plus tolerances, the Contractor shall pay for each kW of no load losses in

excess of the declared values (sub cl. ‎13.15.5), without tolerances, liquidated

damages as prescribed hereunder:

1.1. No-load losses - US$ 6850

The liquidated damages are a genuine estimate of the direct damages foreseen

and are not to be regarded as penalty.

2. For each type of transformer delivered according to this Specification the

average tolerances of no-load losses shall not exceed zero. For each one

percent which the average tolerance exceeds the guaranteed value the

Contractor will pay the IECo a compensation of one percent of the Contract

value.

The reference temperature for no load losses considered in the calculation of the

above indicated damages shall be the standard reference temperature.

The calculation of exceeded no load losses will be performed separately for each

type of transformer.

1/1

B - 135

APPENDIX No. 9

The Israel Electric Corporation Ltd.

PROCEDURE

FOR

HANDLING OF NON-CONFORMANCES It is the obligation of the Contactor to inform Israel Electric Corp. Ltd. (I.E.Co.) about

any deviation from the contract technical specifications, which occurs on any

action/item of the contract realization, such as design, raw materials, manufacturing

testing and inspection and so on. The deviations will be classified into the following

three (3) non conformance levels:

1. NON CONFORMANCE LEVELS

1.1. Non conformance (NC) of Level 1:

1.1.1. NC which do not affect the compliance to the contract technical

specifications and the contract value.

1.1.2. NC which leads to slight modification into the contract technical

specifications, but has certainly no effects on performance, neither on the

short term nor on the long term, as well as not on the contract value.

1.2. Non-conformance of Level 2:

1.2.1. NC which do not affect the contract value but leads to modification of

one or more the contract technical specifications, which has slight effects on

secondary performances.

1.2.2. Scrapping parts with influence on the delivery time.

1.3. Non-conformance of Level 3:

1.3.1. Any other NC which is not included in the previous levels (For

instance such a NC which can affect even uncertainly mandatory

requirement or contract value).

B - 136

2. HANDLING OF NON CONFORMANCE

Contractor reporting duty according to each non conformance levels below:

2.1. Level 1: No duty of notification.

2.2. Level 2: Duty of notification.

Within one (1) week the Non Conformity Report will be

delivered to I.E.Co. Project Manager.

A Corrective Action (CA) Report is required, including the

influence on time schedule, or other relevant contract issue, if

any.

I.E.Co. has the right to send their remarks to the reports,

including discuss the NC level classification.

2.3. Level 3: Duty of notification and approval by IECo necessary.

1. The Contactor shall stop the manufacturing immediately.

2. The Contactor will deliver a NC Report to I.E.Co. Project

Manager within one (1) week.

3. When the disposition is to repair a detailed repair

procedure must be presented to I.E.Co for approval

immediately upon its issuing including a CA.

4. I.E.Co. will send its approval or rejection for the

disposition within one (1) week. Any and only

supplementary day will not be accounted as contactor

delay.

5. Only after I.E.Co.’s approval the Contractor can resume

manufacturing.

6. The NC equipment may be rejected in case of unsuitable

implementation of the repair procedure and/or the CA

taken.

7. Successful completion of the repair procedure and the CA

shallbe reported to I.E.Co.

B - 137

APPENDIX No. 10

B - 138


B - 139

APPENDIX No. 11


B - 140


B - 141


B - 142


B - 143


B - 144


B - 145

Figure-1 : Alternating sheds

Requirements for Alternating sheds type, Ceramic Insulator

designed (24 kV) bushings - TYPE 1&2

REQUIRED OFFERED

p1-p2 15 mm p1-p2 =

s/p1 > 0.65 s/p1 =

c > 30 mm c =

α = 5˚-25 ˚ α =

Da < 300 Da =

SCD = 31 mm/kV SCD =

RUSCD = 53.7 mm/kV RUSCD =

ka = 1 ka =

kad = 1, (otherwise see 60815) kad =

Corrected USCD

= According to the table, below.

Corrected USCD

=

L = L =

CF= L/A < 4 CF= L/A =

l1/d1 < 5 l1/d1 =

l2/d2 < 5 l2/d2 =


B - 146

Terms, definitions and abbreviations Parameter Description

p1-p2 shed overhang distance

s/p Spacing versus shed overhang is ratio of the vertical distance between two similar points

c is the minimum distance between adjacent sheds of the same diameter

α Shed angle

Da average diameter – Da = (Ds1+Ds2+2Dt)/4

SCD Specific creepage distance according to SPS class e

RUSCD reference unified Specific creepage distance according to SPS class e

RUSCD = SCD ∙ √3

Ka Altitude factor - Ka = 1, for altitudes up to 1000 m‎‎

Kad

Diameter factor

Kad = 1, for Da < 300 mm

Kad = 0.0005 Da + 0.85, for Da 300 mm

Corrected USCD

Corrected reference unified specific creepage distance

corrected USCD = RUSCD ∙ Ka ∙ Kad

L Total nominal creepage distance - 𝐿𝑡𝑜𝑡𝑎𝑙 = 𝑢𝑚𝑎𝑥

√3∙ 𝑐𝑜𝑟𝑟𝑒𝑐𝑡𝑒𝑑 𝑈𝑆𝐶𝐷

CF=L/A Creepage factor is a global check of the overall density of creepage distance

l/d is the highest ratio found on any section, for example on the underside of a cap and pin

insulator

A Arcing distance of the insulator

tc

The thickness of the composite material of the insulator, in the connection zones between the composite insulator envelope and the bushing upper and bottom metal parts (head and flange)


B - 147

Figure-2 : Non-Alternating sheds

Requirements for Non-Alternating sheds type, Ceramic Insulator

designed for (24 kV) bushings - TYPE 1&2

REQUIRED OFFERED

s/p > 0.65 s/p =

c > 30 mm c =

α = 5˚-25 ˚ α =

Da < 300 Da =

SCD = 31 mm/kV SCD =

RUSCD = 53.7 mm/kV RUSCD =

ka = 1 kad =

kad = 1, (otherwise see 60815) kad =

Corrected USCD

= According to the table, below.

Corrected USCD

=

L = L =

CF=L/A < 4 L/S =

l/d < 5 l/d =


B - 148

Terms, definitions and abbreviations

Parameter Description

p1-p2 shed overhang distance

s/p Spacing versus shed overhang is ratio of the vertical distance between two similar points

c is the minimum distance between adjacent sheds of the same diameter

α Shed angle

Da average diameter – Da = (Ds1+Ds2+2Dt)/4

SCD Specific creepage distance according to SPS class e

RUSCD reference unified Specific creepage distance according to SPS class e

RUSCD = SCD ∙ √3

Ka Altitude factor - Ka = 1, for altitudes up to 1000 m‎‎

Kad

Diameter factor

Kad = 1, for Da < 300 mm

Kad = 0.0005 Da + 0.85, for Da 300 mm

Corrected USCD

Corrected reference unified specific creepage distance

corrected USCD = RUSCD ∙ Ka ∙ Kad

L Total nominal creepage distance - 𝐿𝑡𝑜𝑡𝑎𝑙 = 𝑢𝑚𝑎𝑥

√3∙ 𝑐𝑜𝑟𝑟𝑒𝑐𝑡𝑒𝑑 𝑈𝑆𝐶𝐷

CF=L/A Creepage factor is a global check of the overall density of creepage distance

l/d is the highest ratio found on any section, for example on the underside of a cap and pin

insulator

A Arcing distance of the insulator

tc

The thickness of the composite material of the insulator, in the connection zones between the composite insulator envelope and the bushing upper and bottom metal parts (head and flange)


B - 149

Figure-3 : Upper and bottom bushing parts

‎

‎ ‎

‎

‎

‎

‎

‎

‎

‎

‎

‎

‎

‎

‎

Materials Details

Type - 1 Type - 2

Insulator envelope material

Bonding material

Primer

Final protective paint

Flange material

Other material

Composite envelope thickness - N.A. N.A.

- the thickness of the composite material of the insulator, in the connection zones between the composite insulator envelope and the bushing upper and bottom metal parts (head and flange)

‎

𝒕𝒄*

𝒕𝒄*


B - 150