SPECIFICATION FOR HERMETICALLY SEALED DISTRIBUTION NETWORK .
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 1 of 85Specification NTS-104ForHermetically SealedDistribution Network Power TransformersSPECIFICATIONFORHERMETICALLY SEALEDDISTRIBUTION NETWORK POWER TRANSFORMERS
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitSpecification NTS-104ForHermetically SealedDistribution Network Power TransformersEdition No.: 4Issued date: June 2011Page No. 2 of 85SPECIFICATIONFORHERMETICALLY SEALEDDISTRIBUTION NETWORK POWER TRANSFORMERSWritten by:B. VainshteinChecked by:Y. ShachakApproved by: N. LibermanZ. Segev
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 3 of 85Specification NTS-104ForHermetically SealedDistribution Network Power TransformersTable of Contents:Clause no.Clause description1.2.3.4.5.6.7.8.9.10.Appendix "A"Appendix "B"Appendix "C"GeneralStandardsDocuments Required For The ProposalData and Technical RequirementsCriteria for final comparison of Bidders offersPrototypeTestsQuality RequirementsSummary of dataConformity with proposal documentsManufacturer Experience to the Purchaser’s satisfactionType and special tests declarationDeclaration regarding the guaranteed losses of the proposedtransformersKnow – How agreement to the Purchaser’s satisfactionSpecification no.50 dated 1/7/09 for mineral insulating oil suppliedwith/within new electrical equipmentDeclaration regarding fulfillment of requirements of SI 5484Israeli StandardRequired schedule for prototype approval of hermetically sealeddistribution network power transformersQuality Requirements (Specification Q – APP – 02, Rev.4)Routine tests results on magnetic media in diskette formCriteria for final comparison of bidders offersSummary Of PricesAppendix "D"Appendix "E"Appendix "F"Appendix "G"Appendix "H"Appendix "I"Appendix "J"Appendix "K"PageNo.55573434373940464749515355636567758385
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 4 of 85Specification NTS-104ForHermetically SealedDistribution Network Power TransformersSPECIFIC PROPOSAL SUBMISSION INSTRUCTIONSBidders shall submit their technical offers in the following way:1. Contents of the offer shall be given at the beginning of the offer2. Each chapter shall be separated from the other by divider page3. 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 andspecial tests reports, etc 4. A separate chapter shall be dedicated for the insulating oil data includingquestionnaire (Appendix “D”) filled in and signed5. A separate chapter shall be dedicated for the Quality assurance and for the Qualitycontrol including: quality manual, ISO 9001 certificates, quality plan and preliminaryinspection and test plan6. A separate chapter shall be dedicated for the painting data7. A separate chapter shall be dedicated for the signed declarations8. A separate chapter shall be dedicated for the know-how agreement
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 5 of 85Specification NTS-104ForHermetically SealedDistribution Network Power Transformers1. GENERAL1.1.SCOPE OF SUPPLYDesign, manufacture, furnish and deliver fully tested, three-phase, oil-immersed, core type,hermetically sealed distribution network power transformers with natural (self) cooling.The transformers shall be installed in indoor transformer stations.2. STANDARDS3.2.1.Unless otherwise stated, hermetically sealed distribution network power transformers shallbe designed, manufactured and tested in accordance with the latest publishedrecommendations of the International Standard IEC 60076.2.2.Standards referred to in this Specification and in Supplements to this Specification areintegral parts of this specification unless explicitly stated otherwise.2.3.The equipment, including all appurtenances and accessories, shall be fabricated, inspected,tested and preserved in compliance with the Standards as specified herein, unless otherwiseindicated.2.4.In the event that no reference to Standard is made herein, all components and parts shall befabricated, inspected, tested and preserved, so as to ensure their fitness for designed use andpurpose.2.5.The transformers shall fulfill the requirements of SI 5484 Israeli Standard. (Distributiontransformers - Requirements for energy efficiency and labeling.In case, during the tender or during contract period the SI 5484 Israeli Standard will bechanged, the Bidder or the Contractor will be required to propose their offer or to supplytransformers, as applicable, which will meet the requirements of the latest published IsraeliStandard regarding energy efficiency and marking.2.6.If this Specification contains requirements which differ from those of the above mentionedStandards except the SI 5484 Israeli Standard or the latest published Israeli Standardregarding energy efficiency and marking, the requirements of this Specification shall takeprecedence.DOCUMENTS REQUIRED FOR THE PROPOSALThe Bidder shall submit together with his offer the following documents:3.1.Completed filled-in questionnaire signed by the Bidder (Manufacturer)(Summary of data) for the proposed transformers.
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 6 of 85Specification NTS-104ForHermetically SealedDistribution Network Power Transformers3.2.Quality Assurance Manual including Quality Procedures of the factory where transformersare manufactured/assembled and tested.3.3.Manufacturer Experience data to the Purchaser’s satisfaction as required in Appendix "A"3.4.Type and special test reports, according to paragraph 7.2 for identical or similartransformers to those proposed in the Bid, including test circuit, instruments used, testsequence and description of method.3.5.Filled-in and signed type and special tests declaration – Appendix "B".The Bidder shall guarantee to perform (in case of award), at his own expense, type andspecial tests as required in paragraph 7 and submit to the Purchaser the reports, in English,of these type and special tests before shipment of the ordered transformers.3.6.Routine tests for identical or similar transformers to those proposed in the Bid, includingtest circuit, instruments used, test sequence and description of method.3.7.Filled-in and signed guaranteed losses declaration – Appendix "C".3.8.General outline drawing with dimensions, materials, coating, weight, etc.3.9.Installation instructions.3.10. Maintenance instructions (including frequency, procedure and materials required).3.11. Manufacturer's requirements for prolonged storage (2-3 years) before installation,taking into account the specific conditions under clause 4.2.3.12. List of components to be manufactured locally (in Israel) (in case of local production).3.13. Preliminary inspection and test plan to be performed by the manufacturer.3.14. ISO 9001 certificate from an Accredited Recognized Certification Body (CB) that is a partof or belongs to an International Certification Network of CB's.3.15. Know – How agreement to the Purchaser’s satisfaction (in case of Know How transfer).The agreement shall meet the requirements as specified in Appendix "D".3.16. Required schedule for prototype approval of Hermetically Sealed Distribution NetworkPower Transformers - Appendix “G”.3.17. Declaration regarding fulfillment of requirements of SI 5484 IsraeliStandard – Appendix "F".
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitSpecification NTS-104ForHermetically SealedDistribution Network Power TransformersEdition No.: 4Issued date: June 2011Page No. 7 of 853.18. Spare parts data which shall include the following information: Manufacturer name of sparepart, Manufacturer number of spare part, order number of spare part (if any), description ofspare part, and reference number in drawing.3.19. Technical data of high voltage windings as required in clause 4.16 of this Specification.3.20. Remarks:3.20.1. All descriptive material shall be in English or Hebrew.3.20.2. The Israel Electric Corporation (I.E.C.) reserves the right, at its discretion, to allowa Bidder to complete such proposal and to submit such documents at a later date,as prescribed by I.E.C3.20.3. Only after written approval by the Purchaser, of all the data and the samplesubmitted with the offer, the offer may be deemed to be technically acceptable andthe Bidder may be invited to submit his price Bid.4.DATA AND TECHNICAL REQUIREMENTS4.1.Operating Conditions4.1.1.The rated voltages of the distribution systems are 12.6 kV, 22 kV and 33 kV.4.1.2.The maximum operating voltages of the above mentioned distribution systemsare 13.8 KV, 24 kV and 36 KV.4.1.3.The system rated frequency is 50 Hertz.4.1.4. The system type is: 3 phase, 3 wire.The neutral point of the secondary winding of the transformer feeding thedistribution system to which the proposed transformers shall be connected isgrounded as follows:- for 12.6 kV system, solidly grounded or grounded via a resistor with a factor ofearthing of 106%- for 22 kV system, resonant grounded via Peterson Coil and might be occasionallysolidly grounded for short periods of time, or solidly grounded or grounded via agrounding transformer- for 33 kV system, solidly grounded or resonant grounded via Peterson coil beingoccasionally solidly grounded for short periods of time
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitSpecification NTS-104ForHermetically SealedDistribution Network Power TransformersEdition No.: 4Issued date: June 2011Page No. 8 of 85It is to be noted that all the distribution systems are operated radially. Ground faultconditions when the system is resonant grounded may sustain for several hours.4.1.5. The maximum three phase symmetrical short-circuit value at substation feedingpoints of:- 12.6 kV system is 350 MVA.- 22 kV system is 500 MVA.- 33 kV system is 500 MVA4.2.Service ConditionsThe service conditions shall be according to clause 4 of IEC Standard 60076-1 andclause 4.3 of IEC Standard 60076-2/1993, with the following additions and modifications:- Severe atmospheric and industrial air pollution, coal dust, salt spray;- Long dry period without any rainfall;- High atmospheric humidity as experienced in coastal areas;- Direct and continuous brilliant solar radiation for long periods;4.3.- maximum relative humidity : 90%;- average relative humidity : 70%;- maximum ambient temperature : 55 C;- daily average temperature : 35 C.The rated power shall be one of the following: 250, 400, 630 or 1000 kVA4.4.The rated line to line primary voltage shall be one of the following: 12.6, 22 or 33 kV.4.5.The rated line to line and line to neutral secondary voltage shall be at no-load 400 and 231volts accordingly.4.6.The number of phases shall be 3.4.7.The rated frequency shall be 50 Hertz4.8.The vector group of connections shall be Dyn11.4.9.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
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitSpecification NTS-104ForHermetically SealedDistribution Network Power TransformersEdition No.: 4Issued date: June 2011Page No. 9 of 854.10. Power Losses and No-Load CurrentThe maximum guaranteed values of the no-load losses, load losses and no-loadcurrent shall not exceed the values given in the following table:Rated PrimaryLine to LineVoltage, 4506509501000Load LossesPL 11. Power Losses Costs and Liquidated Damages4.11.1.The following words or combinations of words shall have the meaningappearing next to them:(a)(b)(c)(d)(e)(f)Guaranteed losses - no load losses and load losses (at 75 C) foreach proposed transformer type (defined by voltage and power),as declared by the Bidder, at the commercial stage of the tender.Actual losses - no load losses and load losses (at 75 C) measuredin each transformer actually supplied to the I.E.C.The original contract period – the period of the contract, enteredinto between the I.E.C and the contractor, not including anyextensions thereof and not including the option period.The option period – the period within which the I.E.C purchasesany transformers from the contractor pursuant to and followingthe exercise of the option, granted to it under the contract.The extension of the original contract period - the period bywhich the original contract period is extended either pursuant tothe I.E.C’s right under the contract, or pursuant to the parties’smutual consent, as applicable.The extension of the option period - the period by which theoption period is extended either pursuant to the I.E.C’s rightunder the contract, or pursuant to the parties’s mutual consent, asapplicable.
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 10 of 85Specification NTS-104ForHermetically SealedDistribution Network Power Transformers(g) Group of transformers - all the transformers of the same type(defined by voltage and power), actually supplied to the I.E.C bythe contractor.(h) Draw order - any order issued by the I.E.C for the supply of thetransformers pursuant to the contract.(i) Contract - the frame contract or frame order, signed or enteredinto between the I.E.C and the contractor, at the conclusion of thetender.(j) Second best Bidder - the Bidder, whose price proposal in thetender is second best to that of the contractor (after weighting allrelevant techno-economical factors, including preference forlocally manufactured goods), as per the I.E.C’s applicableguidelines for techno-economical evaluations of bid proposals.4.11.2.Bidders are required to submit their guaranteed no-load and load losses (at75 C) for each proposed transformer type (defined by voltage and power) atthe commercial stage of the tender.4.11.3.In comparing Bidder's proposals, the guaranteed losses will be taken intoconsideration. The financial value attributable to guaranteed power losseswill be evaluated as follows:- US 7950 per Kilowatt for no-load losses.- US 810 per Kilowatt for load losses.4.11.4.If it turns out that the actual losses exceed the guaranteed losses, thecontractor shall pay to the I.E.C liquidated damages in accordance with theterms and conditions, set forth in the following paragraphs.4.11.5.If the sum of the actual no-load and load losses of any group of transformers(as defined above) supplied in the original contract period, exceeds the sumof the losses guaranteed by the Contractor by more than 5%, the Contractorwill pay liquidated damages according to the rates stipulated in paragraph4.11.3 above.The above liquidated damages will be paid by the Contractor as to eachtransformer where the sum of actual losses exceeds the sum of guaranteedlosses by more than 5%.In respect of those transformers where the sum of the actual losses is equal orlower than 1.05 times the sum of guaranteed losses, no liquidated damageswill be imposed.
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitEdition No.: 4Issued date: June 2011Page No. 11 of 85Specification NTS-104ForHermetically SealedDistribution Network Power TransformersThe liquidated damages, payable by the Contractor will be calculatedaccording to the following formula (as to for each relevant transformerseparately):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 shallbe taken according to above paragraph 4.11.3, only if( POM-1.05 POG) 0, otherwise CO 0.- CL, cost of load losses (in US per Kilowatt). The value of CL shall betaken according to above paragraph 4.11.3, only if ( PLM-1.05 PLG) 0,otherwise CL 0.- POM, actual no-load losses (in Kilowatts)- POG, guaranteed no-load losses (in Kilowatts)- PLM, actual load losses (in Kilowatts)- PLG, guaranteed load losses (in Kilowatts)4.11.6.At the conclusion of the original contract period, the I.E.C shallre-evaluate the actual cost to it of each group of the transformers, supplied bythe Contractor during said period. In re-evaluating such cost, the I.E.C shallsubstitute the guaranteed losses of such group by the actual losses. The resultof such re-evaluation shall then be compared to the cost of said group oftransformers pursuant to the offer of the second best Bidder, based, amongothers, on the tender price and guaranteed losses, declared by said Bidder.If it turns out, based on such comparison, that the Contractor would not havewon the award for said group of transformers, had he declared the actuallosses (rather than the guaranteed losses), then the Contractor shall pay to theI.E.C additional liquidated damages, equal to the difference, if any, betweenthe total cost to the I.E.C of the relevant group of transformers under theContractor ’s offer (calculated on the basis of the actual losses) and the totalcost of the same group of transformers under the offer of the second bestBidder, plus ten (10%) percent of the total contract price of such group oftransformers, adjusted to the date of the re-evaluation. It is clarified, that theliquidated damages, payable under this paragraph shall be in addition to theliquidated damages, if any, payable under the provision of the previousparagraphs, above.4.11.7.The provision of the previous paragraphs 4.11.5 and 4.11.6 shall also applyas to each group of transformers, supplied during the option period, theextension of the original contract period and the extension of the optionperiod (as such combination words are defined above), if applicable, subjectonly to the following modification: anywhere, in the previous paragraph,where the words “original contract period” appear, they shall be substituted
Israel Electric Corporation Ltd.Marketing DivisionNational Network UnitSpecification NTS-104ForHermetically SealedDistribution Network Power TransformersEdition No.: 4Issued date: June 2011Page No. 12 of 85by words “option period”, or “the extension of the original contract period”,or “the extension of the option period”, as applicable.4.11.8.If the actual losses of any transformer exceed the guaranteed losses plustolerances (the tolerances are specified in Standard IEC 60076) or exceed thelosses given in Table 1 and Table 2 of Standard SI 5484, the transformer willbe rejected and the contractor shall be charged with any applicable liquidateddamages for the delay, if any, in the delivery of such transformer. In theevent that the quantity of rejected transformers in any given period of sixmonths (beginning on the date of the first supply pursuant to the first draworder and every period of six months thereafter) exceed four (4%) percent ofthe total number of transformers, supplied during such period, the contractorshall be in a substantial breach of contract, entitling the I.E.C to pursue anylegal remedy, available, under the law, for such a breach.4.12. Temperature RiseThe temperature rise of the top layer of the oil shall not exceed 60 degrees Celsius.The temperature rise of the windings (measured from the resistance change)shall not exceed 65 degrees Celsius.4.13. Insulation LevelsThe requirements concerning insulation are summarized in the following table:RatedLine to LineVoltage, Un(kV)12.622330.44.14. Noise LevelSystem HighestLine to LineVoltage, Um(kV)13.82436-Basic InsulationLevelBIL (1.2/50µs)(kV peak)95125170-One Minute WithstandVoltage (r.m.s.)at frequency of 50Hz(kV r.m.s.)3850703
Israel Electric Corpor
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