specification for hermetically sealed distribution network power transformers

Israel Electric Corporation Ltd.

Marketing Division

National Network Unit

Specification NTS-104

For

Hermetically Sealed

Distribution Network Power Transformers

Edition No.: 5

Issued date: March 2017

Page No. 1 of 90

SPECIFICATION

FOR

HERMETICALLY SEALED

DISTRIBUTION NETWORK POWER TRANSFORMERS


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SPECIFICATION

FOR

HERMETICALLY SEALED

DISTRIBUTION NETWORK POWER TRANSFORMERS

Written by: B. Vainshtein Checked by: Y. Shachak Approved by: O. Hayon

E. Sharaby


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Table of Contents:

Clause no. Clause description Page No.

1. Purchaser 4

2. Name of item & project 4

3. Location of item & project 4

4. Scope of work 4

5. Terminal points & terminal connection 5

6. Cyber & information security 5

7. Quality assurance & quality control 5

8. Standards & codes 6

9. Technical documentation 6

10. Data and technical requirements 11

11. Tests & inspections 32

12. Packaging & delivery 34

13. Storage & handling 34

14. Nameplate/marking 35

15. Notes 41

16. Special requirements 41

17. Revisions 42

18. Summary of data 43

19. Conformity with proposal documents 49

Appendix "A" Manufacturer Experience to the Purchaser’s satisfaction 50

Appendix "B" Type and special tests declaration 53

Appendix "C" Declaration regarding the guaranteed losses of the

proposed transformers

55

Appendix "D" Know – How agreement to the Purchaser’s satisfaction 57

Appendix "E" Specification no.50 dated 1/7/09 for mineral insulating oil

supplied with/within new electrical equipment

59

Appendix "F" Declaration regarding fulfillment of requirements of SI

50464 Part 1 Israeli Standard

67

Appendix "G" Required schedule for prototype approval of hermetically

sealed distribution network power transformers

69

Appendix "H" Quality Requirements (Specification Q – APP – 02, Rev.4) 71

Appendix "I" Routine tests results on magnetic media in diskette form 78

Appendix "J" Criteria for final comparison of bidders offers 86

Appendix"K" Summary Of Prices 88


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1 PURCHASER

The Israel Electric Corporation Limited (I.E.Co.).

2 NAME OF ITEM & PROJECT

This specification covers following equipment: THREE PHASE POWER OIL-IMMERSED HERMETICALLY SEALED TRANSFORMERS WITH NATURAL (SELF) COOLING FOR DISTRIBUTION NETWORK MEDIUM VOLTAGE

3 LOCATION OF ITEM & PROJECT The transformers shall be installed in indoor transformer stations of the medium voltage distribution network.

4 SCOPE OF WORK

This specification covers requirements for the design, develop, manufacture, preserve, pack, furnish and deliver fully tested (with export packing if applicable) three-phase, oil-immersed, core type, hermetically sealed distribution network power transformers with natural (self) cooling. Transformers shall be complete with accessories, as specified hereinafter.

4.1 PROJECT DESCRIPTION

Manufacture, furnish and deliver fully tested Hermetically Sealed Distribution Network Oil – Immersed Power Transformers.

4.2 SCOPE OF SUPPLY The following transformers are required:

Rated Power, Sn

(kVA) Rated Line to Line Voltage Un (kV)

I.E.C catalogue number

630

1000 12.6

2078046

2691681

250

400

630

1000

22

4102380

4102398

2078079

2691699

250

400

630

1000

33

4102406

4102414

2078103

3702891


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4.3 SCOPE OF SERVICE

N/A

5 TERMINAL POINTS & TERMINAL CONNECTION

N/A

6 CYBER&INFORMATION SECURITY

N/A

7 QUALITY ASSURANCE & QUALITY CONTROL

7.1 QUALITY ASSURANCE

7.1.1 The Manufacturer shall have a Quality Management System (QMS) certified to ISO 9001 requirements, with the following scope of certification: design and production of transformers.

7.1.2 In case of Knowhow transfer both companies the knowhow supplier and the knowhow recipient shall have a Quality Management System (QMS) which meets the requirements of ISO Standard 9001. Manufacturer operating under a Knowhow agreement, the scope of his certification shall include production of type of equipment as described in this specification. Furthermore the Knowhow supplier scope of certification shall include: design, production of transformers. The Purchaser reserves the right, to allow a Manufacturer, who receives the Knowhow, to submit the above mentioned certificate during the prototype approval stage, if the production line does not exist at the proposal submission stage.

7.1.3 The Manufacturer’s main suppliers shall also have a Quality Management System (QMS) certified to ISO 9001requirements, with scope of certification corresponding to the scope of supply indicated in the Manufacturer’s order and the requirements of this specification.

7.1.4 ISO 9001certification requirements – certificate, demonstrating compliance with the above mentioned requirements, respectively, granted each by a Certification Body (CB) which is a part of or belong to an International Certification Network of CB's, should be submitted to Purchaser with the proposal. The CB should be accredited by an Accreditation Body which is a member of the International Accreditation Forum Multilateral Arrangement (IAF MLA). The certificate should bare the marks of: the CB, the above indicated Certification Network of CB's and of its Accreditation Body.


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7.2 QUALITY CONTROL

The quality control measures applied during the production of the transformers shall conform to the requirements specified in Appendix "H". In addition to the requirements of Appendix "H" (Q-APP-02, Rev. 4) the bidder shall submit with his proposal a preliminary Quality Plan and Inspection and test Plan (as defined in clauses 2.2 and 2.3 of Q-APP-02). Representatives of the Israel Electrical Corporation shall be authorized to visit the Manufacturer's plant, witness tests and obtain full details of each phase of the transformer's production.

8 STANDARDS & CODES

8.1 Unless otherwise stated, distribution network power transformers shall be designed, manufactured and tested in accordance with the latest published recommendations of the International Standard IEC 60076.

8.2 The transformers shall fulfill the requirements of SI 50464 Part 1 Israeli Standard. (Distribution transformers - Requirements for energy efficiency and marking).

8.3 Standards referred to in this Specification and in Supplements to this Specification are integral parts of this specification unless explicitly stated otherwise.

8.4 The equipment, including all appurtenances and accessories, shall be fabricated, inspected, tested

and preserved in compliance with the Standards as specified herein, unless otherwise indicated.

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

8.6 If this Specification contains requirements which differ from those of the above mentioned Standards except the SI 50464 Part 1 Israeli Standard the requirements of this Specification shall take precedence.

9 TECHNICAL DOCUMENTATION

9.1 GENERAL Bidders shall submit their technical offers in the following way: - Contents of the offer shall be given at the beginning of the offer. - Each chapter shall be separated from the others by divider page. - Each proposed type of transformer shall be presented in a separate chapter including: the questionnaire (Summary of Data) filled in and signed, drawings, routine, type and special tests reports, etc… - A separate chapter shall be dedicated for the insulating oil data including questionnaire filled in and signed, see Appendix “E” - Specification no.50 dated 1/7/09 for mineral insulating oil supplied with/within new electrical equipment.


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- A separate chapter shall be dedicated for the Quality assurance and for the Quality control including: quality manual, ISO 9001 certificates, quality plan and preliminary inspection and test plan - A separate chapter shall be dedicated for the painting data - A separate chapter shall be dedicated for the signed declarations - A separate chapter shall be dedicated for the know-how agreement - All the mentioned documents shall be in English or Hebrew.

9.2 TECHNICAL DOCUMENTS AND SAMPLES TO ACCOMPANY THE PROPOSAL

The Bidder shall submit together with his offer the following documents from the manufacturer: 9.2.1 Completed filled-in questionnaire signed by the Bidder (Manufacturer)

(Summary of data) for each proposed transformers.

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

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

9.2.4 Type and special test reports, according to paragraph 11 for identical or similar (distribution network power transformers with rated medium voltage between 10 kV till 36 kV and rated power between 400 kVA till 1250 kVA) transformers to those proposed in the Bid, including test circuit, instruments used, test sequence and description of method.

9.2.5 Filled-in and signed type and special tests declaration – Appendix "B". The Bidder shall guarantee to perform (in case of award), at his own expense, type and special tests as required in paragraph 11 and submit to the Purchaser the reports, in English, of these type and special tests before shipment of the ordered transformers.

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

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

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

9.2.9 Installation instructions.

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

9.2.11 Manufacturer's requirements for prolonged storage (2-3 years) before installation, taking into account the specific conditions under clause 10.1.1.


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

9.2.13 Preliminary inspection and test plan (ITP) to be performed by the manufacturer.

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

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

9.2.16 Declaration regarding fulfillment of requirements of SI 50464 Part 1 Israeli Standard – Appendix "F"

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

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

9.2.19 Technical data of medium voltage windings as required in clause 10.4.14 of this Specification.

9.3 TECHNICAL DOCUMENTS AND SAMPLES AFTER NOTIFICATION OF AWARD

9.3.1 The successful Bidder (henceforth referred to as "the Contractor") shall manufacture one transformer prototype of each ordered type (defined by voltage and power) for Purchaser's approval.

9.3.2 The Contractor shall submit to the Purchaser one set of drawings of the prototypes for Purchaser's approval.

9.3.3 The drawings shall show the overall outside dimensions, mounting dimensions, and gross weight for the prototype, as well as details of base, cooling fins, tap changer, terminals, primary and secondary bushings, M.V. and L.V. connection schemes, nameplate, warning plates, overpressure relief device and its cover, tank, lid, steel plates for installation of protection nets, oil type. In addition, data of the windings, transformer core and structure shall be shown in separate drawings.

9.3.4 The following items shall be approved during the prototype approval: - High Voltage and Low Voltage Bushings - Tap changer - Overpressure relief device - Cover for Overpressure Relief Device - Type of oil - Oil level indicator - Emptying tap - Groundings screws


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- Nameplate - Painting - Marking - Transformer base - Lifting lugs - Tie-Downs - Thermometer pocket - Warning plates - Wheels - Steel plates for installation of protection nets After approval of the above items no changes will be allowed without written approval of the National Network Unit. This approval will be given only in Special cases where severe problems should arise with Subsuppliers of Contractor.

9.3.5 In addition to the routine tests which shall be performed in any case on each transformer, the Contractor shall perform the type and special tests on the prototype. The above tests shall be performed according to this Specification and according to IEC 60076 Standard. The above type and special tests shall be performed only after Purchaser's visual inspection and preliminary approval of the prototype.

9.3.6 The Contractor shall supply the Purchaser 3 (three) copies, in English, of the reports of the above routine, type and special tests for Purchaser's approval and for Purchaser's final approval of the prototypes.

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

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

9.3.8 The Purchaser is entitled to cancel the order for the supply of transformers if the prototypes are not approved by the Purchaser.

9.3.9 In any case, the Contractor shall not manufacture the rest of the transformers ordered before

receiving the Purchaser's final approval of the prototype.

9.3.10 Any submitted data, report, drawing or descriptive material not written in English or Hebrew will not be accepted. All dimensions shall be stated in metric units.

9.3.11 The Contractor shall supply to the Purchaser, if required, and by a particular order at any time

during a period of 25 years from last Purchaser's order, spare parts (coils, etc..) for the previously ordered transformers, in the quantities that are needed by the Purchaser for repair of damaged transformers of Contractor's manufacture.


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The Contractor shall supply to the Purchaser together with the ordered transformers the spare parts in quantities given in the following table:

Spare

Part

Number

Name of Spare Part Quantity of Spare Parts

(in per cent of ordered quantity of

transformers in the tender)

1. Medium Voltage Coil 2%

2. Low Voltage Coil 2%

3. Tap-Changer 4%

4. Medium Voltage Bushing 3%

5. Low Voltage Bushing 3%

6. Stem of Low Voltage Bushing 4%

7. Low Voltage Connection Clamp 5%

8. Overpressure Relief Device 0.5%

9. Oil Level Indicator 2%

10. Emptying Tap of Transformer Tank 0.5%

11. Transformer Tank 1%

The spare parts shall be supplied together with spare part list which includes the information stated in paragraph 9.2.18. In the event the Bidder is of the opinion that the Purchaser should buy other recommended spare parts, such spares should be specified in the Technical proposal. Any submitted data, report, drawing or descriptive material not written in English or Hebrew will not be accepted.

9.4 SCHEDULE UP TO DELIVERY APPROVAL

Please see APPENDIX "G" – "Required schedule for prototype approval of hermetically sealed distribution network power transformers".


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10 DATA AND TECHNICAL REQUIREMENTS

10.1 ENVIROMENTAL CONSIDERATIONS & SERVICE CONDITION

10.1.1 THE SERVICE CONDITIONS shall be according to clause 4 of IEC Standard 60076-1/2011 and clause 5.1 of IEC Standard 60076-2, with the following additions and modifications:

- Severe atmospheric and industrial air pollution, coal dust, salt spray; - Long dry period without any rainfall; - High atmospheric humidity as experienced in coastal areas; - Direct and continuous brilliant solar radiation for long periods; - maximum relative humidity : 90%; - average relative humidity : 70%;

- maximum ambient temperature : 55°C;

- daily average temperature : 35°C.

Remark: Some of the Equipment may be installed at altitudes greater than 1000 m above sea level (maximum 2000m) and at altitudes under sea level (minimum – 400m). The Bidder shall specify the required operations to be performed in order to install the Equipment in the above altitudes for proper operation.

10.1.2 SYSTEM DATA

10.1.2.1 The rated voltages of the distribution systems are 12.6 kV, 22 kV and 33 kV.

10.1.2.2 The maximum operating voltages of the above mentioned distribution systems

are 13.8 kV, 24 kV and 36 kV.

10.1.2.3 The system rated frequency is 50 Hertz.

10.1.2.4 The system type is: 3 phase, 3 wire. The neutral point of the secondary winding of the transformer feeding the distribution

system to which the proposed transformers shall be connected is grounded as follows: - for 12.6 kV system, solidly grounded or grounded via a resistor with a factor of earthing of 106% - for 22 kV system, resonant grounded via Peterson Coil and might be occasionally solidly grounded for short periods of time, or solidly grounded or grounded via a grounding transformer - for 33 kV system, solidly grounded or resonant grounded via Peterson coil being occasionally solidly grounded for short periods of time


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

10.1.2.5 The maximum three phase symmetrical short-circuit value at substation feeding points of:

- 12.6 kV system is 350 MVA. - 22 kV system is 500 MVA. - 33 kV system is 500 MVA

10.2 RELIABILITY, AVAILABILITY, MAINTAINABILITY

N/A

10.3 FUNCTIONAL REQUIREMENTS

General Requirements:

10.3.1 The transformers will be installed on I.E.Co 12.6kV, 22kV and 33kV distribution systems in indoor transformers stations.

10.3.2 The transformers shall be three-phase, hermetically sealed, oil-immersed, core type, with natural (self) cooling.

10.4 PROPERTIES

10.4.1 The rated power shall be one of the following: 250, 400, 630 or 1000 kVA

10.4.2 The rated line to line primary voltage shall be one of the following: 12.6, 22 or 33 kV.

10.4.3 The rated line to line and line to neutral secondary voltage shall be at no-load 400 and 231

volts accordingly.

10.4.4 The number of phases shall be 3.

10.4.5 The rated frequency shall be 50 Hertz

10.4.6 The vector group of connections shall be Dyn11

10.4.7 The short-circuit impedance at full load shall be:

- (4.4 ± 0.4)%, for 250, 400 and 630 kVA transformers

- (6 ± 0.6)%, for 1000 kVA transformers


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

Rated Primary

Line to Line

Voltage, Un

(kV)

Rated

Power

Sn

(kVA)

No-load

Losses

Po

(W)

Load Losses

PL (75oC)

(W)

No-Load

Current

Io

(%)

12.6 630 730 5200 2.0

1000 940 9000 2.0

22

250 360 2750 2.3

400 520 3850 2.1

630 730 5200 2.0

1000 940 9000 2.0

33

250 450 3250 2.3

400 650 4600 2.1

630 950 5500 2.0

1000 1000 9000 2.0

10.4.9 Power Losses Costs and Liquidated Damages

10.4.9.1 The following words or combinations of words shall have the meaning appearing next to them:

(a) Guaranteed losses - no load losses and load losses (at 75°C) for each proposed transformer type (defined by voltage and power), as declared by the Bidder, at the commercial stage of the tender.

(b) Actual losses - no load losses and load losses (at 75°C) measured in each transformer actually supplied to the I.E.Co. (c) The original contract period – the period of the contract, entered into between the I.E.Co and the contractor, not including any extensions thereof and not including the option period. (d) The option period – the period within which the I.E.Co purchases any transformers from the contractor pursuant to and following the exercise of the option, granted to it under the contract. (e) The extension of the original contract period - the period by which the original contract period is extended either pursuant to the I.E.Co’s right under the contract, or pursuant to the parties’s mutual consent, as applicable. (f) The extension of the option period - the period by which the option period is extended either pursuant to the I.E.Co’s right under the contract, or pursuant to the parties’s mutual consent, as applicable. (g) Group of transformers - all the transformers of the same type (defined by voltage and power), actually supplied to the I.E.Co by the contractor. (h) Draw order - any order issued by the I.E.Co for the supply of the transformers pursuant to the contract.


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(i) Contract - the frame contract or frame order, signed or entered into between the I.E.Co and the contractor, at the conclusion of the tender. (j) Second best Bidder - the Bidder, whose price proposal in the tender is second best to that of the contractor (after weighting all relevant techno-economical factors, including preference for locally manufactured goods), as per the I.E.Co’s applicable guidelines for techno-economical evaluations of bid proposals.

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

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

10.4.9.4 If it turns out that the actual losses exceed the guaranteed losses, the contractor shall pay to the I.E.Co liquidated damages in accordance with the terms and conditions, set forth in the following paragraphs.

10.4.9.5 If the sum of the actual no-load and load losses of any group of transformers (as defined above) supplied in the original contract period, exceeds the sum of the losses guaranteed by the Contractor by more than 5%, the Contractor will pay liquidated damages according to the rates stipulated in paragraph 10.4.9.3 above. The above liquidated damages will be paid by the Contractor as to each transformer where the sum of actual losses exceeds the sum of guaranteed losses by more than 5%. In respect of those transformers where the sum of the actual losses is equal or lower than 1.05 times the sum of guaranteed losses, no liquidated damages will be imposed. The liquidated damages, payable by the Contractor will be calculated according to the following formula (as to for each relevant transformer separately):

C=CO(∆POM-1.05∆POG)+CL(∆PLM-1.05∆PLG) where: - C, value of liquidated damages (in US$)

- CO, cost of no-load losses (in US$ per Kilowatt). The value of CO shall be taken according to

above paragraph 10.4.9.3, only if (∆POM-1.05∆POG)>0, otherwise CO = 0.

- CL, cost of load losses (in US$ per Kilowatt). The value of CL shall be taken according to

above paragraph 10.4.9.3, only if (∆PLM-1.05∆PLG)>0, otherwise CL = 0.


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- ∆POM, actual no-load losses (in Kilowatts)

- ∆POG, guaranteed no-load losses (in Kilowatts)

- ∆PLM, actual load losses (in Kilowatts)

- ∆PLG, guaranteed load losses (in Kilowatts)

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

10.4.9.7 The provision of the previous paragraphs 10.4.9.5 and 10.4.9.6 shall also apply as to each group of transformers, supplied during the option period, the extension of the original contract period and the extension of the option period (as such combination words are defined above), if applicable, subject only to the following modification: anywhere, in the previous paragraph, where the words “original contract period” appear, they shall be substituted by words “option period”, or “the extension of the original contract period”, or “the extension of the option period”, as applicable.

10.4.9.8 If the actual losses of any transformer exceed the guaranteed losses plus tolerances (the tolerances are specified in Standard IEC 60076) or exceed the losses given in of Standard SI 50464, Part 1 the transformer will be rejected and the contractor shall be charged with any applicable liquidated damages for the delay, if any, in the delivery of such transformer. In the event that the quantity of rejected transformers in any given period of six months (beginning on the date of the first supply pursuant to the first draw order and every period of six months thereafter) exceed four (4%) percent of the total number of transformers, supplied during such period, the contractor shall be in a substantial breach of contract, entitling the I.E.Co to pursue any legal remedy, available, under the law, for such a breach.


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10.4.10 Temperature Rise The temperature rise of the top layer of the oil shall not exceed 45 degrees Celsius. The temperature rise of the windings (measured from the resistance change) shall not exceed 50 degrees Celsius.

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

Rated

Line to Line

Voltage, Un

(kV)

System Highest

Line to Line

Voltage, Um

(kV)

Basic Insulation

Level

BIL (1.2/50µµµµs)

(kV peak)

One Minute Withstand

Voltage (r.m.s.)

at frequency of 50Hz

(kV r.m.s.)

12.6 22 33

13.8 24 36

95 125 170

38 50 70

0.4 - - 3

10.4.12 Noise Level

The maximum noise level (A-weighted surface sound pressure level) shall not exceed the values given in the following table and measured at a distance of one meter from the transformer. The noise level test shall be performed according to Standard IEC 60076-10 using noise level meter periodically calibrated according to IEC 61672-3. Additionally the technical specification of the noise level meter shall state that noise level meter meets the requirements of the IEC 61672. All relevant documents shall be presented to the I.E.C before performing noise level tests.

Rated Power, Sn

(kVA)

A-Weighted Surface

Sound Pressure Level

LpA

(dB(A), 1m)

250

400

630

1000

48

50

52

54


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

Rated Power, Sn

(kVA) Rated Line to Line Voltage Un (kV)

I.E.C catalogue number

Height (mm)

Width (mm)

Length (mm)

630

1000 12.6

2078046

2691681 1845 960 1570

250

400

630

1000

22

4102380

4102398

2078079

2691699

1600

1670

1845

1845

760

840

1070

1070

1280

1470

1570

1570

250

400

630

1000

33

4102406

4102414

2078103

3702891

1850

1950

2030

2030

1000

1010

1070

1070

1280

1450

1730

1730

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

10.4.14 Windings

• The winding materials shall be: - copper wire (for medium voltage (12.6,22,33 kV) windings); - copper foil (for low voltage (0.4 kV) windings).

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

• The Medium Voltage windings shall be covered with insulation paper.

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

10.4.15 Core

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


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10.4.16 Tap Changer

Every transformer shall be equipped with an off-load tap changer on the medium voltage side permitting adjustment to voltages of:

• -5%, -2.5%, 0%, +2.5%, +5% of the rated voltage for 12.6 kV, 22kV and 33 kV transformers The tap changer shall be operable manually from outside the transformer when the transformer has no input voltage applied. The tap changer shall be of a type approved by the Israel Electric Corporation. Presently, type ASP (Appareils Scientifiques de Precision - France). The head of the tap-changer on the transformer lid shall be of cast aluminium or steel.

10.4.17 Medium Voltage Bushings

Three plug-in bushings shall be installed on the high voltage side of each transformer.

Distance between centers of the high voltage bushings shall be: 400 ± 5% (mm) The bushings shall be in accordance with requirements of Standard EN 50181, interface type C with M16 bolted thread, 630A, 36 kV. These bushings shall allow connection of cables to the transformer (one cable per phase) by means of a "cable connector" ("Tee connector") suitable for nominal current of 630A. The "Tee connectors" shall be supplied by the Israel Electric Corporation (presently Cellpack, TE Connectivity, NKT, EUROMOLD) while the Manufacturer shall supply the suitable bushings installed as high voltage connections of the transformer. The bushings shall have an M16 thread. The Bidder shall submit to the Purchaser together with his offer type tests reports of the proposed high voltage plug-in bushings for approval. The type tests shall be performed according to Standard IEC 60137. The following high voltage plug-in bushings are already approved by I.E.Co: - ELASTIMOLD, type M 400 AR-3/J - COMEM, type PPS 36/400 The Bidder who offers the above mentioned approved high voltage bushings does not have to submit type tests reports of these bushings.


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The plug-in bushings and their base shall be well protected against dust accumulation and water penetration until transformer installation with rigid plastic covers.

10.4.18 Low Voltage Bushings and Low Voltage Connection Clamps

Four bushings shall be installed on the low voltage side and shall comply with Standard EN50386:2002 as follows: - For 250-400 kVA transformers Ir 630 A, Type 3; - For 630 kVA transformers Ir 1250 A, Type 4; - For 1000 kVA transformers Ir 2000 A, Type 5 All exposed metal parts of bushings shall be electrotinned. The minimum tin coat

thickness shall be 20 µm. The connection clamps to be supplied by the Contractor shall be according to the following drawings: for 250 kVA transformers according to the following Drawing 1, for 400 and 630 kVA transformers according to the following Drawing 2, for 1000 kVA transformers according to the following Drawing 3. The connection clamps shall be electrotinned.


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Voltage

(kV)

Power

(kVA)

Current

(A)

22, 33/0.4 250 630

DRAWING no.1: LOW VOLTAGE CONNECTION CLAMP FOR 250 kVA TRANSFORMERS


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Voltage

(kV)

Power

(kVA)

Current

(A)

Thread D

(mm)

22, 33/0.4 400 630 M20

12.6, 22, 33/0.4 630 1250 M30 x 2

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


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Voltage (kV) Power (kVA) Current (A) Thread D (mm)

12.6, 22, 33/0.4 1000 2000 M42 x 3

DRAWING 3: LOW VOLTAGE CONNECTION CLAMP FOR 1000 kVA TRANSFORMERS


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10.4.19 Method of Cooling

The cooling method of the transformers shall be: ONAN.

10.4.20 Grounding Screws

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

10.4.21 Painting

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

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

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

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

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

minimum dry film thickness shall be 30 micrometers.

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

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

90 micrometers.

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

10.4.22 Plates for installation of the protection nets

Steel plates 5 mm thick shall be welded on the transformer lid for installing of protection nets (against any accidental touch). The protection nets will be supplied and installed by IEC. The

arrangement of the welded steel plates is shown in drawing no. 4 (for transformers 250 ÷630 kVA) and in drawing no. 5 (for 1000kKVA transformers)


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10.4.23 Lifting Lugs

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

10.4.24 Type of Oil

The insulating oil filled in transformer shall meet the requirements stated in Purchaser "Specification For Mineral Insulating Oil Supplied With/Within New Electrical Equipment" no.50 dated 1/7/09 - Appendix "E" of this specification. (Data required in this Specification no. 50 shall be submitted to the Purchaser). The amount of oil in the transformer shall not exceed 1000 litters.

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

10.4.26 Overpressure Relief Device

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

10.4.27 Thermometer Pocket The transformer shall be equipped at the top with a cylindric pocket (internal depth: 150 mm, 3/4" Gas inner threaded diameter) for a thermometer to measure the oil temperature. The transformer shall be supplied with the thermometer pocket filled with oil and capped. The transformer pocket shall be welded on the transformer lid. See drawing no. 6.


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DRAWING NO. 4: ARRANGEMENT OF THE STEEL PLATES FOR INSTALLATION OF

PROTECTION NETS IN 250 ÷ 630 kVA SEALED TYPE TRANSFORMERS


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DRAWING NO. 5: ARRANGEMENT OF THE STEEL PLATES FOR INSTALLATION OF PROTECTION NETS IN 1000 kVA SEALED TYPE TRANSFORMERS


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DRAWING NO. 6: THERMOMETER POCKET


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10.4.28 Oil level indicator

The transformer shall be equipped with a magnetic oil level indicator, mounted on the transformer lid. The window of the oil level indicator shall be directed towards the low voltage side of the transformer.

10.4.29 Transformer Filling Opening The transformer shall be equipped with an oil filling opening (2" diameter minimum) covered by a suitable threaded cap.

10.4.30 Transformer base and wheels

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

10.4.31 Tie-Downs

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

Tie-downs arrangement on transformer lid is given in following sketch:

10.4.32 Transformer weight

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

Tie-down

Transformer lid

Transformer


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I H G E D C B A kVA

42 130 65 535 460 461 545 1060 250

45 145 80 535 505 455 545 1180 400

45 145 80 570 550 490 580 1200 630

45 145 80 570 550 490 580 1570 1000 DRAWING NO. 7: BASE FOR TRANSFORMERS WITH RATED LINE TO LINE VOLTAGE OF 12.6 kV AND 22 kV


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I H G E D C B A kVA

45 145 80 590 500 510 600 1150 250

45 145 80 630 530 550 640 1250 400

45 145 80 670 595 590 680 1370 630

45 145 80 670 595 590 680 1570 1000

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


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10.5 COMMISSIONING

N/A

10.6 OPERATION & MAINTENANCE

General

10.6.1 The Contractor shall submit Installation instructions for approval.

10.6.2 The Contractor shall submit Maintenance instructions (including frequency, procedure and materials if required).

10.7 SAFETY

The Bidder shall submit Safety instructions for the equipment.

10.8 TRAINING N/A

10.9 CONFIGURATION MANAGEMENT

N/A

10.10 ERGONOMICS, HUMAN ENGINEERING

N/A

10.11 METHODS

N/A

10.12 MAINTENANCE

10.12.1 The recommendations for maintenance of the offered transformers shall be clearly

stated in the offer documents.


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11 TESTS & INSPECTIONS

11.1 General requirements for tests

The tests shall be performed in accordance with the latest published recommendations of the International Standard IEC 60076 and this Specification by and at the expense of the Manufacturer. For Medium voltage bushings tests, please refer to clause 10.4.17

11.2 Type and Special Tests

11.2.1 The following type tests and special tests shall be performed on only one transformer prototype of the

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

11.2.2 The sum of the measured no-load and load losses of the transformer, on which type and special tests

will be performed, shall be equal or less than the sum of its guaranteed no-load and load losses.

11.2.3 Type and Special Test Reports

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

11.2.4 The type and special test reports shall contain a detailed drawing of the tested equipment, photos of the

equipment prior to and after the test.

11.2.5 In successful type test the following words must be written in the test report:

"The transformer passed the test successfully according to IEC 600076-X Standard (X – relevant standard)".

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


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11.3 Type and special tests laboratories:

11.3.1 Type and special tests shall be performed in one of the following international laboratories:

• F.G.H (Germany)

• I.P.H (Germany)

• CESI (Italy)

• KEMA (Netherlands)

• VEIKI-VNL (Hungary)

• Technalia Reserch & Innovation (Spain)

In order to perform the type and special tests in other laboratories a

prior written approval by I.E.Co National Network Unit is required at

the technical stage of the Bid.

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

11.3.2 The Contractor shall submit to the I.E.Co National Network Unit, forty five (45) days before

performing those type and special tests, the names of the laboratories and the programs of those type and special tests for I.E.Co approval.

11.3.3 I.E.Co reserves the right to participate in those type and special tests.

11.4 Routine Tests

11.4.1 A routine test shall be performed by the Contractor for each ordered transformer

11.4.2 Duly certified routine tests are obligatory. Such tests shall be performed at the Manufacturer’s laboratory.

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

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

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

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


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11.5 Routine Test Report

• Every transformer shall be tested in accordance with, and shall withstand, the tests specified in the IEC-60076 Standard as "Routine Tests".

• The routine test report shall state according to which standard and clause the test was performed.

• The Routine Test Report shall contain the transformer rated data, serial number and the results of the tests, the required values and the values obtained during the test.

• The routine tests reports shall be submitted to Purchaser up to one month prior to delivery of the first batch of the offered transformers.

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

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

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

12 PACKAGING & DELIVERY

Each packaging shall be clearly marked in print (large letters) with the following:

• Trade mark.

• Israel Electric Corp. Catalogue Number.

• Contract and/or Order Number.

• Serial Number.

• Weight

• Instructions for unloading with a mobile crane and with a fork-lift truck, checking of the correctly balanced during the transportation.

• Lifting and tying points.

13 STORAGE & HANDLING

Manufacturer's shall supply requirements for prolonged storage (2-3 years) before erection, taking into account the specific conditions under clause 10.1.


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14 NAMEPLATE/MARKING

14.1 Nameplates

The transformer shall be fitted with a nameplate in Hebrew which contains all the items requested by Standard IEC-60076/1. In addition to the above requirements, the nameplate shall contain the actual value of the noise level (A-weighted surface sound pressure) of the transformer measured in dB(A) at a distance of one meter from the transformer. In all other transformers which the noise level (A-weighted surface sound pressure) was not measured the result value from the type test measurement shall be written in the nameplate. The diagram of connections between Medium Voltage windings, tap changer and Medium Voltage bushings shall also be marked on the nameplate. See drawings no. 9 and its translation in English, drawing no 10. The actual no load losses and load losses (at reference temperature) of the transformer shall be marked according to the requirements of the Israeli Standard no. SI 50464 Part 1. I.E.Co catalogue number and the number of this specification shall also appear in the nameplate. The nameplate itself shall be made of anodized sheet aluminium. The nameplate shall be installed on the low voltage connections side. The nameplate shall be approved by I.E.Co.


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DRAWING NO. 9: RATING PLATE in HEBREW


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DRAWING NO. 10: RATING PLATE in HEBREW with translation into ENGLISH


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14.2 Marking

14.2.1 The phase to be connected to each bushing shall be marked next to it in the following manner: A;B;C on the primary voltage side a;b;c;n on the secondary voltage side

next to the grounding screw The above marking shall be stamped and red color painted on tin plates which shall be fastened with glue on the transformer lid. The marking next to grounded screws shall not be painted.

14.2.2 The Serial number, power (in kVA) and voltage (in kV) of the transformer shall be marked on the transformer lid in white letters, 4 cm high. The format of the markings shall be: first line: AA/YY/XXXXXX/XXXX, where AA - Manufacturer code (will be given by the Purchaser after notification of the award), two (2) letters, YY - year of manufacture, two (2) digits, XXXXXX - series, six (6) digits, XXXX - serial number of the transformer, four (4) digits, second line: PPPP/VVV, where

PPPP - rated power of the transformer in kVA, up to four (4) digits, VVV - rated line to line primary voltage of the transformer in kV, up to three (3) digits for example: AA/09/012345/0001 630/22

14.2.3 The location of the marking shall be approved by I.E.Co during prototype approval.

14.2.4 An identification plate with the transformer stamped serial number shall be installed on the transformer

core in order to allow identification of the transformer parts taken for repair.


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14.3 Warning Plates

14.3.1 On the upper side of each transformer, the Manufacturer shall install a warning plate with the

following content:

14.3.2 Near the emptying tap of each transformer, the Manufacturer shall install a warning plate with the following content:

אזהרה

"אין לקחת דגימת שמן משנאי זה ".

14.3.3 The warning plates shall be of an approved type by Israel Electric Corporation Ltd. The plates shall be

made of anodized sheet aluminium. For more details of the warning plates see drawing no. 11

אזהרה

"אסור לחבר מתח לשנאי כאשר התקע אינו מחובר לשקע."


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DRAWING NO. 11: WARNING PLATES


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15 NOTES

N/A

16 SPECIAL REQUIREMENTS

16.1 Repair

The Bidder shall submit to I.E.Co at the technical stage of the Tender together with the proposal documents, all required data for the coils repair in I.E.Co workshops. This data shall include all the required materials.

16.2 Technical Services and Repairing of Faulty Equipment During the Warranty Period (Without Extra Costs to I.E.Co)

16.2.1 The Supplier shall provide services for faulty equipment during the warranty period. The services shall be given by one of the following ways:

16.2.1.1 In case the Manufacturer's plant is located in Israel the manufacturer representatives shall check the equipment together with I.E.Co representatives within 24 hours after receiving written notification of malfunction of the equipment. The equipment shall be repaired or replaced by new one within one month after checking of the equipment.

16.2.1.2 In case the Manufacturer's plant is not located in Israel those services may be given via a Service Company in Israel (Local Service Company for medium voltage equipment maintenance). The Service Company shall check the equipment together with I.E.Co representatives within 24 hours after receiving written notification of malfunction of the equipment. The equipment shall be repaired or replaced by new one within one month after checking of the equipment.

16.2.1.3 In case the Manufacturer's plant is not located in Israel and the Supplier chose not to have Local Service Company for medium voltage equipment maintenance in Israel, then the manufacturer representative shall come to Israel within 72 hours after receiving written notification and shall check the equipment with I.E.Co representatives within 24 hours after arriving to Israel. The equipment shall be repaired or replaced by new one within one month after checking of the equipment.

16.2.2 In case the equipment will not be repaired or replaced within time period as stated above, the contractor shall pay to the I.E.Co liquidated damages of 2500$ for delay of each week up to the total cost of each faulty equipment.


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16.2.3 The Service Company in Israel shall have a written authorization from transformer's manufacturer or from "know-how" provider for providing services for faulty transformers to I.E.Co during warranty period.

16.2.4 The I.E.Co shall have the rights to check the Service agreement in order to assure the following:

16.2.4.1 Transfer of all the technical documents, drawings, technical directives and etc. necessary for the testing, repairing, operating, maintaining and packing of the proposed equipment to the Service company;

16.2.4.2 Transfer all the instruction for testing and repairing of the proposed equipment for defined list of malfunctions to the Service company;

16.2.4.3 Proper skills and experience of the Service company workers.

16.2.4.4 Proper equipment and tools required to perform the technical service.

16.2.5 The Service Company in Israel shall be approved by I.E.Co subject to withstand the requirement described in clause 16.2.4 above during the prototype approval by I.E.Co, see Appendix "G".

16.3 Technical Services and Repairing Faulty Equipment after the Warranty Period

16.3.1 The Supplier shall provide spare parts for equipment after the warranty period for a period of 25 years from last Purchaser's order. Those spare parts shall be purchased by I.E.Co per request.

17 REVISIONS

N/A


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

Summary Of Data For Distribution Network Power Transformers

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

Signature of Bidder _____________________

(Insert all data in this column)

18.1. DRAWINGS, INSTRUCTIONS AND WEIGHT

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

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

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

18.1.4 Drawings of warning plates ........(attached/not attached)

18.1.5 Drawing of the primary voltage connectors

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

18.1.6 Drawing of the secondary voltage connectors

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

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

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

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

18.2 OVERALL DIMENSIONS (including all accessories

and appurtenances )

18.2.1 Height .................................................................... (mm)

18.2.2 Width ..................................................................... (mm)

18.2.3 Length .................................................................... (mm)

18.3 GENERAL DATA

18.3.1 What is the type number of the proposed transformer?


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Name of Bidder: _______________________



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

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

18.3.5 Rated frequency .................................................. (Hz)

18.3.6 Number of phases ...............................................

18.3.7 Identification symbol cooling method (method of cooling)

18.3.8 Group of connection

18.3.9 Rated power ...................................................... (kVA)

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

18.3.11 Rated insulation level at the primary voltage side

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

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

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

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

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

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

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

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

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


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Name of Bidder: _______________________



18.4 STRUCTURE AND ACCESSORIES

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

Primary voltage side

Secondary voltage side

18.4.2.1 Material of the windings................................

18.4.2.2 Shape of the windings...................................

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

18.4.2.4 Manufacturer name of the windings

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

18.4.4 Medium voltage bushings

18.4.4.1 Number of medium voltage bushings ........................

18.4.4.2 Rated voltage of the medium voltage bushings ……………………………………....(kV)

18.4.4.3 Rated current of the medium voltage bushing ............................................................(A)

18.4.4.4 Are the high voltage bushings of identical type to this described in Standard DIN 47636 Part 1 type ATL 36-400? ........................... (Yes/No)

18.4.4.5 Medium voltage bushings complying with Standard ……………………………

18.4.4.6 Name of the medium voltage bushings manufacturer and its type ...................................

18.4.4.7 Distance between centers of the medium voltage bushings ................................................... (mm)


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Name of Bidder: _______________________



18.4.4.8 Do the high voltage bushings have a M16 thread? ..............................................(Yes/No)

18.4.4.9 Do the proposed plug-in high voltage bushings allow connection of ELASTIMOLD TEE K400TB and M400TB type connectors? ...........................................................(Yes/No)

18.4.5 Low Voltage Bushings

18.4.5.1 Number of low voltage bushings .......................

18.4.5.2 Rated voltage of the low voltage bushings (kV)

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

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

18.4.5.5 Low voltage bushings complying with Standard

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

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

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

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

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

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

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


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Name of Bidder: _______________________



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

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

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

18.4.7 Ratings of the tap changer ………………………..(%) 18.4.7.1 Tap changer type ………………………. 18.4.7.2 Tap changer manufacturer name ………. 18.4.7.3 Number of taps …………………………

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

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

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

18.4.10 Oil Tests

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

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

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

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

18.5. MEDIUM VOLTAGE BUSHINGS TYPE TESTS

18.5.1 Are the medium voltage bushings type tests reports as required in clause 10.4.16 of this specification attached to the Bidder's proposal? ................ …………..(attached/not attached)

Name of Bidder: _______________________


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

18.6 ROUTINE TESTS

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

18.7. TYPE TESTS AND SPECIAL TESTS

18.7.1 Tests of temperature rise

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

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

18.7.2 Tests of the insulation levels and dielectric tests.

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

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

18.7.3 Ability to withstand short-circuit tests

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

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

18.7.4 Noise level test

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

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

18.8 Do the transformers fulfill the requirements of the SI 50464, Part 1 standard ? (Distribution transformers - Requirements for energy efficiency and marking) ................................(Yes/No)


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

Signature of Supplier Date of Proposal


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APPENDIX "A"

Manufacturer Experience to the Purchaser’s satisfaction


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Manufacturer Experience 1. The Manufacturer shall have at least 5 (five) years accumulated experience in manufacturing

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

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

3. The experience shall reflect at least 3000 Distribution Network Power Transformers supplied by Manufacturer or by Know-How Supplier.

4. The experience described in paragraph 1 or 2, as applicable, shall be proven by a statement of manufacturing experience (see below) which shall be submitted by the Manufacturer together with his offer to the Purchaser.


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STATEMENT OF MANUFACTURING EXPERIENCE

I, ________________ (enter name), hereby state the following:

1. I_______________ (enter name) , am authorized to sign this statement on behalf of____________

("the Manufacturer")

2. I hold the position of ____________________ ____________________________ (enter job title and

description, i.e. partner, production manager, sales manager, etc.) at the Manufacturer.

3. I have been in this position since __________ (enter date).

4. I am providing this statement with regards to I.E.Co's tender number ____________ ("the Tender").

5. The facts/details given in this statement have been checked and verified by me.

6. _________________ (the Manufacturer) has experience in production distribution power transformers for

at least 5 years, prior to tender submission. The experience shall reflect at least 3000 distribution network

power transformers supplied by Manufacturer.

7. I hereby undertake to provide, upon IECo's request and at its sole discretion, any other documents (reference

list, quantity ,dates of supply, letter of recommendations etc. ) or other Information requested for this Tender

for purposes of proving said experience.

_______________

Signature

_______________

Date


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APPENDIX "B"

Type and special tests declaration


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Declaration To be returned signed and stamped by Supplier

We hereby declare, that in case of award we will perform at our own expense and responsibility, type and special tests as required in paragraph 11.2 of Specification NTS-104 and submit to the Purchaser the reports, in English, of these type and special tests at least one month before shipment of the ordered transformers.

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

Tender No. _______________


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APPENDIX "C"

Declaration regarding the guaranteed losses of the proposed transformers


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We hereby declare, that in case of award the No-load and Load losses of the proposed transformers will not exceed the values given in paragraph 10.4.8 of Specification NTS-104. Name of Supplier: Signature and stamp of Supplier: Date:


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APPENDIX "D"

Know – How agreement to the Purchaser’s satisfaction


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

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

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

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

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

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

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


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APPENDIX "E"

SPECIFICATION no.50

FOR MINERAL INSULATING OIL

SUPPLIED WITH/WITHIN NEW ELECTRICAL EQUIPMENT

July 2009


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APPENDIX "F"

Declaration regarding fulfillment of

requirements of SI 50464, Part 1 Israeli Standard


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We hereby declare, that the proposed transformers shall fulfill the requirements of the SI 50464, Part 1 Israeli Standard (Distribution transformers – Requirements for the energy efficiency and marking). We hereby declare, that after notification of award, at the prototype approval stage, if we will be the successful Bidder, we shall submit to the National Network Unit of I.E.Co written approval issued by the Standards Institution of Israel that, each awarded prototype meets the requirements of the published Israeli Standard regarding energy efficiency and marking.

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


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APPENDIX "G"

Required schedule for prototype approval of

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

Weeks

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

1 Starting date (*)

2 Submission of drawings and technical data for the transformer and its accessories to I.E.C. for approval

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

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

5 Manufacture of the prototypes

6 Visual inspection of the prototypes

7 Routine tests performance

8 Type tests performance and submission of preliminary type tests reports

9 Submission of the final type test reports for approval

10 Submission of the approval of meeting the requirements of the latest published official S.I 50464 regarding energy efficiency and marking

11 Type tests report approval

12 Submission agreement with Service company(**)

13 Approval of the Service company

14 Prototypes approval

Bidder name and title: Bidder signature

(*)- the date on which contractual obligation has been created between the parties, as specified in the invitation to submit proposals in the Tender/RFP. (**)-Regarding clause 16.2.1.2


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APPENDIX "H"

QUALITY REQUIREMENTS

(SPECIFICATION Q - APP – 02, Rev 4)


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APPENDIX "I"

Routine Tests Results

on

Magnetic Media In Diskette Form

Israel Electric Corp. Ltd.

Information Systems and Communication Division Dept. of Technical Information Systems

March 1999

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

Method of forwarding results to I.E.C.

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

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

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

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

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

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

C. Total number of enclosed diskettes.

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

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

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

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

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

V. The Data

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

B. The records will be built as follows:

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

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

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

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

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

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

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

Yair Baron

Department Manager

Enc.:

Specification of format of records for Transformer routine Tests.

Specification of format of records for

Transformer Routine Tests

Rec.

Description

Num./

A-N Field

Length

(Total/

Integer.

frac)

Units Format/ Options/

Comments

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

‘MANUFACTURER:’

2. Manufacturer α/Ν 60 - Actual name of

manufacturer.


‘CUSTOMER:ISRAEL

ELECTRIC Co.’


‘TRANSFORMERS ON

THIS SHIPMENT:’

5. Actual number

of transformers

in shipment

Ν 2 - The maximum number

of transformers

may not exceed

20 !

6. (empty/insignif

icant record)

- - - Blanks

7. Three Phase

Transformer α/Ν 60 - Oil immersed with

conservator

Oil immersed -

Sealed

Cast – Resin

8. Delivery date α/Ν 10 Dd/mm/yyyy;

MANDATORY!

The Delivery date

should be the

latest date

between :

Manufacture date,

Test date.

9. Manufacture

date α/Ν 10 Dd/mm/yyyy;

MANDATORY!

10. Test Date α/Ν 10 Dd/mm/yyyy;

MANDATORY!

11. Customer’s Spec. No.

α/Ν 10

12. Order no. α/Ν 15

Rec.

Description

Num./

A-N Field

Length

(Total/

Integer.

frac)


Comments

13. Serial no. α/Ν 17 AA/YY/XXXXXX/ZZZZ,

Where:

AA – Manufacturer

code,

YY – Year,

XXXXXX – Serial

No./

manufacturing,

ZZZZ - Sequence

number.

14. Type α/Ν 25

15. Rated Power N 4.0 KVA

16. Frequency N 2.0 Hz Value: 50

17. Vector Group α/Ν 5 DYn11

18. Primary Rated Voltage

Ν 2.1 KV Allowed values:

12.6, 22, 33

19. Secondary Rated Voltage

Ν 3.0 V

20. Primary Rated Current

Ν 2.2 A

21. Secondary Rated Current

Ν 4.2 A

22. Insulation Class

α/Ν 1

23. Cooling α/Ν 4

24. Short Circuit Current

N 1.3 KA

25. Short Circuit Duration- Max

N 1.0 sec

26. Total Weight N 1.3 t

27. Oil Weight N 3.0 Kg

28. Winding Resistances (This is not a

field! This

describes the

following fields).

29. Principle Tap Voltage

N 5.0 V

30. At Temperature N 2.1 °C

31. Winding Resistance A-B

N 2.3 Ohm

Rec.

Description

Num./

A-N Field

Length

(Total/

Integer.

frac)


Comments

32. Winding Resistance B-C

N 2.3 Ohm

33. Winding Resistance C-A

N 2.3 Ohm

34. Winding Resistance a-b

N 2.3 mOhm

35. Winding Resistance b-c

N 2.3 mOhm

36. Winding Resistance c-a

N 2.3 mOhm

37. Voltage Ratio and Phase

Displacement

Check

(This is not a

field! This

describes the

following fields).

38. Tap Voltage 1 N 5.2 V

39. Voltage Ratio AB/an

N 3.3 Negative value

allowed.

40. Voltage Ratio BC/bn


allowed.

41. Voltage Ratio CA/cn


allowed.




allowed.



allowed.



allowed.




allowed.



allowed.



allowed.




allowed.



allowed.



allowed.




allowed.



allowed.



allowed.

Rec.

Description

Num./

A-N Field

Length

(Total/

Integer.

frac)


Comments

58. Vector Group α/Ν 5 Dyn11

59. Short Circuit Impedance and

Load Loss

(This is not a

field! This

describes the

following fields).

60. Tap N 1.0

61. Mean Temperature

N 2.1 °C

62. VA-B N 3.2 V

63. VB-C N 3.2 V

64. VC-A N 3.2 V

65. Average Voltage N 3.2 V

66. IA-B N 2.3 A

67. IB-C N 2.3 A

68. IC-A N 2.3 A

69. Average Current N 2.3 A

70. Total Losses N 5.1 W

71. Losses at Temperature

According to

Standard

(This is not a

field! This

describes the

following fields).

Oil Immersed at

75˚ C

Cast Resin at 120˚

C

72. Padd N 4.0 W

73. I ² RH .V. + I 2 RL.V.

N 5.1 W

74. Ptot N 5.1 W

75. Vz% N 1.2 %

76. Vr% N 1.2 %

77. Vx% N 1.2 %

78. No Load Loss and Current

(This is not a

field! This

describes the

following fields).

79. Tap. Ν 1.0

80. Va-b N 3.2 V

81. Vb-c N 3.2 V

82. Vc-a N 3.2 V

83. Ia N 1.2 A

84. Ib N 1.2 A

85. Ic N 1.2 A

86. Average Current N 1.2 A

87. No Load Losses N 4.1 W

Rec.

Description

Num./

A-N Field

Length

(Total/

Integer.

frac)


Comments

88. Dielectric Test (This is not a

field! This

describes the

following fields).

89. Voltage Frequency

N 2.0 Hz The value 50.

90. H.V. Withstand Voltage

N 2.2 K.V.

R.M.S

91. Application Duration

N 2.0 sec

92. L.V. Withstand Voltage.

N 1.2 K.V.

R.M.S

93. Application Duration

N 2.0 sec

94. Induced Over Voltage (This is not a

field! This

describes the

following fields).

95. Applied Voltage N 3.1 K.V.

R.M.S

96. Frequency N 3.0 Hz Usually the value

125.

97. Duration N 2.1 sec

98. Oil Test (This is not a

field! This

describes the

following fields).

99. Oil Type α/Ν 20

100 Oil Breakdown

Withstand

Voltage

N 2.1 K.V. (may be left

empty)


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APPENDIX "J"

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


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

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

Parameter Weight

(in %) 1. Sound Noise level (20)

Sound noise level required by this specification - 14; Smallest sound noise level - 20; Other - proportional Sound Noise level shall be proven during type tests.

20

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

2.1 Maintainability (40) 2.1.1 Low and Medium voltage windings Combined – 7; Not combined – 10 2.1.2 Connections method Welding and Pressing – 10; Welding - 8; Pressing – 7 2.1.3 Connections of the Medium voltage windings Identical - 10; Not identical – 7 2.1.4 Sealing type of tank Rubber – 10; Others – 7

10

10

10

10

2.2 Finish (10) 2.2.1 Paint Quality Homogenous - 5; Not Homogenous – 3.5 2.2.2 Rust traces No traces found – 5; Traces found– 3.5

5 5

2.3 Structure (30) 2.3.1 Circular/ Oval windings Circular - 10; Oval - 7 2.3.2 Metal/Wood structure supporting active part Metal - 10; Wood - 7 2.3.3 Circular/square Medium voltage wire Circular - 10; Square - 7

10

10

10

Minimum grade of the technical evaluation of the proposal which fulfills I.E.Co technical requirements will be 70.


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APPENDIX "K"

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


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

TRANSFORMER RATING

Name of Bidder: ________ ______________________

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

Rated Power: ___________ kVA Origin of Manufacturer

(Insert prices and data in this column)

Non Israeli Currency

NIS

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

mentioned rating, complete with all accessories and appurtenances as specified in Specification NTS-104. The above mentioned firm price shall include the price for the routine. The price for the type and special tests shall not be included in the above mentioned firm price and shall be given separately in following paragraph1.2.

1.2 Prices for the following type and special tests as

specified in clause 11.2 of this specification:

1.2.1 Lightning impulse test on line terminals

1.2.2 Temperature rise test

1.2.3 Short-circuit test (Special test)

1.2.4 Noise level test (on three transformers)

(Special test)

2. POWER LOSSES AND NO-LOAD CURRENT 2.1 No-load current …………………………………….. %

2.2 No-load losses ………………………………….... Watts

2.3 Load losses (75º C) ………………………………. Watts


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TRANSFORMER RATING Name of Bidder: _________________________

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

Signature of Bidder _________________________ _________________________

(Insert prices and data in this column)

Non Israeli Currency

NIS

3 Prices for following spare parts according to quantities given in paragraph 9.3.11 of this Specification:

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

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

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

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

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

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

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

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

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

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

3.11 One (1) Transformer Tank ...............................

____________ ___________ Signature of Bidder Date of Bid