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CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA Regd. Office: IDCO Towers, 2nd Floor, Bhubaneswar- 751022

TENDER SPECIFICATION NO :

CESU/ P&S/MR/279/ 2012-13

FOR

PROCUREMENT OF 33 KV OUT DOOR VACUUM

CIRCUIT BREAKERS AND 11 KV OUT DOOR VACUUM

CIRCUIT BREAKERS WITH O/D CR PANEL FOR FEEDER PROTECTION

(Under M/R Head)

DATE OF OPENING OF TENDER: Dt.06.02.2013 TIME: 15.30 Hours onwards.

PLACE: IDCO TOWERS, 2ND FLOORS, Bhubaneswar.

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CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA Regd. Office: IDCO Towers, 2nd Floor, Bhubaneswar- 751022

TENDER SPECIFICATION No:- CESU/P&S/ MR/279 / 2012-13

33 KV & 11 KV OUT DOOR VACUUM CIRCUIT BREAKERS

CONTENTS SECTION No DESCRIPTION PAGE NO.

SECTION-I INVITATION FOR BIDS (IFB) 4-7 SECTION-II INSTRUCTION TO BIDDERS (ITB) 8-16 SECTION-III GENERAL TERMS AND CONDITIONS OF

CONTRACT (GTCC)

17-26

SECTION-IV(A) TECHNICAL SPECIFICATION FOR 33 KV OUT DOOR VCB

27-52

SECTION-IV(B) TECHNICAL SPECIFICATION FOR 11 KV OUT DOOR VCB

53-77

SECTION-V LIST OF ANNEXURES (SCHEDULES & FORMATS)

78

ANEXURE-I: Abstract of GCTC 79 ANNEXURE-II: PBG Format 80-81 ANNEXURE-III: Price Schedule 82 ANNEXURE-IV(A): Technical Data Schedule For 33 KV

Out Door VCB

83-93

ANNEXURE-IV(B): Technical Data Schedule For 11 KV Out-door VCB

94-104

ANNEXURE-V(A): Technical Deviation Sheet 105 ANNEXURE-V(B): Commercial Déviation Sheet 106 ANNEXURE-VI: List of Materilas Supplied 107 ANNEXURE-VII: Self Declaration Sheet 108

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CENTRAL ELECTRICITY SUPPLY UTILITY OF ORSSA

2nd Floor, IDCO Towers, Janapath, Bhubaneswar-751022 Tel:0674- 2545681,2542895 Fax:0674-2543125

Web site: www.cescoorissa.com TENDER NOTICE

Tender Notice No.CESU-H.Qrs/P&S/MR/535/33 & 11KV VCB-/ 998 Dt.11.01.2013

For and on behalf of CESU, the undersigned invites sealed tenders in duplicate superscribing the Tender Specification No. & date of opening (as mentioned in the specifications) from reputed manufacturers only for supply of the following equipments under M/R as per the schedule below.

Sl. No.

Schedule of Materials Qty. (Nos./Sets)

Cost of Tender

Paper (Rs.)

EMD (Rs. In Lakhs.)

1 11 Kv indoor VCB include of I/C, B/C & Fdr. Panel-03 sets

(25 Nos.)- (03 sets)

Rs.10,500.00 inclusive of

5% VAT

Rs.1.00 Lakhs (Rupees One Lakhs )

Only. 2 33 KV Outdoor VCB with CR Panel for

feeder protection (50 nos) Rs.3.00 Lakhs

( Rupees Three Lakhs ) Only.

3 11 KV Outdoor VCB with CR Panel for feeder protection

( 25 nos)

Rs.10,500.00 inclusive of

5% VAT Rs.1.00 Lakhs ( Rupees One Lakhs

) Only. Time Schedules:- TIME SCHEDULE:-

Sl. No.

Description of event For Tender Specification No.CESU/P&S/MR/278/12-13(For 11 KV I/D VCB)

For Tender Specification No.CESU/P&S/MR/279/12-13(For 33 KV & 11 KV O/D VCB)

1 Last Date & Time of selling of tender papers 04.02.2013 up to 4.00PM 05.02.2013 up to 4.00PM 2 Last Date & Time for submission of Tender 05.02.2013 up to1.00 PM 06.02.2013 up to1.00 PM

3 Last Date & Time for Opening of Tender

05.02.2013, 3.30 PM onwards

06.02.2013, 3.30 PM onwards

The details about the quantity, technical specification, qualifying criteria etc. can be seen from respective tender documents available at our website www.cescoorissa.com The detailed tender papers can be had from the undersigned at the above address on payment of the amount as mentioned by Cash / Demand Draft drawn on any Nationalized/Scheduled Bank issued in favour of CESU, payble at Bhubaneswar only. The cost of tender paper is non-refundable. No Telegraphic/Courier option for collecting Tender Documents shall be entertained.

The intending bidders can also download the tender document from our website www.cescoorissa.com, However the bidder has to furnish a Bank draft for an equivalent amount towards the cost of the bid documents along with the bid failing which the bid will be rejected. In the event of any specified date for the sale, submission or opening of bids being declared a holiday for purchaser, the bids will be sold / received / opened up at the appointed time on the next working day. CESU also reserves the right to accept or reject any or all tenders without assigning any reason thereof, if the situation so warrants.

Sd/- Chief General Manager (Purchase & Stores)

,,

Memo No.999 Dt.11.01.2013 Copy forwarded to;

COO / G.M. (Finance ) / Sr.GM(Tech.)/DDO of this office for information & necessary action.

Sr. GM(IT))/D.M. ( P.R. ) of this office for information. The Tender Notice is to be displayed on the Notice Board and published in Two leading ORIYA & Two English News Paper with all India Circulation , and in CESU’s website cescoorissa.com. Sd/- Chief General Manager

(Purchase & Stores)

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SECTION-I

INVITATION FOR BIDS ( IFB)

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CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA INVITATION FOR BIDS (IFB)

FOR SUPPLY OF

33 KV & 11 KV( OUT DOOR) VACCUM CIRCUIT BREAKERS (COMPETITIVE BIDDING)

Specification No. CESU/P&S/ MR/279/ 2012-13 ,

SECTION- I

1.0 Scope of Supply: 2.0 For and on behalf of CESU, the undersigned invites bids under two part bidding system

in double sealed cover for the package, duly super-scribed with tender specification No. and date of opening from manufacturers only for design, manufacture, supply, testing, inspection, loading at factory, transportation to unloading at site/stores including guarantee obligation for Type Tested 33 KV outdoor VCB & 11 KV ( outdoor )VCB under M/R head.

2.0 Submission of the Bids: 2.1 The Bidders are required to submit a detailed and comprehensive bid, consisting of

Technical and Commercial Proposal and conditions/schedule of non-compliance, if any. The submission of the Bids shall be in the manner specified in the instruction to Bidders. The due date of submission shall be Dt.06.02.2013.

3.0 CESU will not be responsible for any cost or expenses incurred by bidders in

connection with the preparation and delivery of bids. 3.1 CESU reserves the right to cancel, postpone, withdraw the invitation for Bids without

assigning any reason thereof and shall bear no liability whatsoever consequent upon such a decision if the situation so warrants.

4.0 Bid Security & Time Schedule: Description Date &Time Sale of Tender Documents: Dt. 05.02.2013 Up to 4 .00 PM Submission of Bids; Dt. 06.02.2013 Up to 1.00 PM Opening Bids: Dt. 06.02.2013 15.30 Hrs onwards Required Quantities Equipment: As specified under clause-5 Completion of the delivery: Within 180 days from the date of issue of

purchase order as per delivery schedule. Cost of Tender Document: (Non refundable) Rs.10,500.00 ( Rupees Ten Thousand Five

Hundred Only inclusive of VAT@5% ) Payable by Cash or Bank Draft drawn from a Scheduled Bank issued in favour of “CESU” payable at Bhubaeswar.

Amount of Bid Security (EMD) payable:

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1)For 33 KV VCB:- Rs.3 Lakhs (Rupees Three lakhs ) only in shape of A/C payee Bank Draft drawn from a Scheduled Bank Bank issued in favour of CESU, payable at Bhubaneswar only. 2)For 11 KV VCB:- Rs.1 Lakhs (Rupees One lakhs ) only in shape of A/C payee Bank Draft drawn from a Nationalised/Scheduled Bank Bank issued in favour of CESU, payable at Bhubaneswar only. Note: bidders shall quote full tendered quantity of 33 KV VCB or full tendered quantity of 11 KV VCB or can quote full tender quantity for the both , but EMD/should have furnish separately for 33 KV VCB & 11 KV VCB as mentioned above.

5.0 Schedule of Requirements & Delivery:

Within 90 days of issue of Purchase Order

(Consignment - I)

Between 180 of issue of Purchase Order

(Consignment - II) Item Description

Total Quantity ( in Nos.)

CDR Store

BBSR Store

CDR Store

BBSR Store

33 KV outdoor VCB .

50 (Fifty)

12 (Twelve) 13 (Thirteen) 12 (Twelve) 13

(Thirteen)

11 KV outdoor VCB .

25 (Twenty five)

12 (Twelve) 13 (Thirteen) Nil Nil

6.0 QUALIFICATION OF BIDDERS: 6.1 Criteria for qualification 6.1.1. Techno-Commercial :

a) The bidder should be a manufacturer of 33 KV & 11 KV Vacuum Circuit Breakers for which he submits his offer or should be a manufacturer of higher rating Vacuum Circuit Breakers ( both Short Circuit and Normal current rating).

b) The bidder should have already supplied 33 KV & 11 KV Vacuum Circuit Breakers for which he submits his offer ( or higher capacity Vacuum Circuit Breakers, both normal current Amp. & short circuit rating KA) not less than the quantity tendered as per this specification within last 3 Years. Bidders should submit self-attested copies of P.Os and abstract there of to prove the quantity as supplied within last 3 years.

c) The bid shall be accompanied by user’s certificate from any distribution Company/ State Govt./ Central Govt. Or their undertaking(s) in support of satisfactory performance of their above rated VCBs, supplied earlier, for at least three years from the date of first commissioning.

d) The offered VCB(s) should have been type-tested at International reputed laboratory/ CPRI/ NABL. Approved laboratory. The bid shall accompany with type-test reports conducted at International reputed laboratory/ CPRI/ NABL. Approved laboratory for the offered VCBs conducted within five years from date of tender. Bids not accompanied with type test reports conducted within five years shall not be considered for evaluation.

e) The bidders who have earlier failed to execute the purchase order(s) of the CESU and or black listed by CESU/any of the distribution utility shall not be eligible to participate in this tender.

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f) The bidder(s) quote for full tendered quantity of 33 KV VCB or full tendered quantity of 11 KV VCB or can quote full tendered quantity of both, separately else the bid shall not be considered for evaluation.

6.1.2 Financial:

i) For 33 KV VCB the minimum average annual turnover of the intending bidder should not be less than Rs.6 Crores (Rupees Six Crores ) during past three Financial Years. ii) The minimum average annual turnover of the intending bidder should not be less than Rs.2 Crores (Rupees Two Crores ) during past three Financial Years. Note:- Bidder(s) offering/ participated in other tendered including this tender items must meet the sum of minimum turnover requirements of the items tendered participated.

6.1.3. Documentation: 6.1.3.1.

Bidder shall furnish copies of original documents defining the constitution or legal status, place of registration and principal place of business namely of Memorandum and Article of Association.

6.1.3.2.

Written power of attorney / Board Resolution of the signatory of the bid.

6.1.3.3.

Bidders shall submit audited financial reports for the past three financial years. In case the Bidder is in existence for less than three years the audited financial report/s from the date of its incorporation should be furnished. However, the bidder(s) shall meet the minimum annual average turnover requirements.

6.1.3.4.

Copies of the Purchase Order supported with Stores Receipts Vouchers/Delivery Challans, Users Performance Certificate & Type Test Certificate as required under clause-6.

6.1.3.5 Bids without the documents shall be rejected outright unless relaxed by CESU.

7.0 CESU reserves the right to relax the qualifying norms without assigning any reason thereof, if the situation so warrants.

8.0 All correspondence with regard to the above shall be made to the following address.

CHIEF GENERAL MANAGER (PURCHASE & STORES) CENTRAL ELECTRICITY SUPPLY UTILITY OF ORSSA

2nd Floor, IDCO Towers, Janapath, Bhubaneswar-751022 Tel:0674- 2545681,2542895 Fax:0674-2543125

Web site: www.cescoorissa.com ,,,

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SECTION-II

INSTRUCTION TO BIDDERS (ITB)

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SECTION-II INSTRUCTION TO BIDDERS (ITB)

1. SOURCE OF FUNDS 1.1 CESU hereinafter referred to as the “Purchaser’s Representative” is desirous of

procurement of Vacuum Circuit Breakers of different ratings for strengthening and improvement of distribution network under CESU from the funds available under M/R head.

2. SCOPE OF WORK 2.1 The scope of work in brief shall include design, manufacture, inspection, supply,

loading at factory, transportation to Stores, unloading at stores including guarantee and after sales service obligations of 33 KV & 11 KV OUT DOOR VACUUM CIRCUIT BREAKERS in conformity to the technical specification enclosed herewith in Section- IV A & IVB.

3. DISCLAIMER 3.1 This Document includes statements, which reflect various assumptions, which may

or may not be correct. Each Bidder should conduct its own estimation and analysis and should check the accuracy, reliability and completeness of the information in this document and obtain independent advice from appropriate sources in their own interest.

3.2 Neither Purchaser nor its employees will have any liability whatsoever to any Bidder

or any other person under the law or contract, the principles of restitution or unjust enrichment or otherwise for any loss, expense or damage whatsoever which may arise from or be incurred or suffered in connection with anything contained in this document, any matter deemed to form part of this document, provision of services and any other information supplied by or on behalf of Purchaser or its employees, or otherwise arising in any way from the selection process for the supply/ provision of services for the project.

3.3 Though adequate care has been taken while issuing the Bid document, the Bidder

should satisfy himself that documents are complete in all respects. Intimation of any discrepancy/ doubt shall be sent in the following address for seedy response.

CHIEF GENERAL MANAGER (PURCHASE & STORES) CENTRAL ELECTRICITY SUPPLY UTILITY OF ORSSA

2nd Floor, IDCO Towers, Janapath, Bhubaneswar-751022 Tel:0674- 2545681,2542895 Fax:0674-2543125

3.4 This document and the information contained herein are Strictly Confidential

and are for use of only the person (s) to whom it is issued. It may not be copied or distributed by the recipient to third parties (other than in confidence to the recipient’s professional advisors).

4 COST OF BIDDING 4.1 The Bidder shall bear all costs associated with the preparation and submission

of its Bid and Purchaser will in no case be responsible or liable for those costs. 5. BIDDING DOCUMENTS 5.1 The Scope of Work, Bidding Procedures and Contract Terms are described in

the Bidding Documents. In addition to the covering Letter accompanying Bidding Documents, the Bidding documents include:

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(a) Invitation For Bids (IFB) - Section –I (b) Instruction to Bidders (ITB) - Section –II (c) General Terms and Conditions of Contract

(GTCC) - Section –III

(d) Technical Specification - Section –IVA ,IVB (e) Annexures for prescribed formats. - Section –V 5.2 The Bidder is expected to examine the Bidding Documents, including all

Instructions, Forms, Terms and Specifications. Failure to furnish all information required by the Bidding Documents or submission of a Bid not substantially responsive to the Bidding Documents in every respect will / may result in the rejection of the Bid.

6. AMENDMENT OF BIDDING DOCUMENTS 6.1 At any time prior to the deadline for submission of Bids, the Purchaser may, for

any reason, whether at its own initiative or in response to a clarification requested by a prospective Bidder, modify the Bidding Documents by way of issuing an addendum.

6.2 The Amendment/ Addendum shall be part of the Bidding Documents, pursuant to Clause 6.1, and it will be binding on them.

6.3 In order to afford prospective Bidders reasonable time in which to take the Amendment into account in preparing their Bids, the Purchaser may, at its discretion, extend the deadline for the submission of Bids.

7. LANGUAGE OF BID The Bid, prepared by the Bidder, and all correspondence and documents relating

to the Bid exchanged by the Bidder and the Purchaser, shall be written in the English Language. Any printed literature furnished by the Bidder may be written in another Language, provided that this literature is accompanied by an English translation, in which case, for purposes of interpretation of the Bid, the English translation shall govern.

8. DOCUMENTS COMPRISING THE BID 8.1 The Bid prepared and submitted by the Bidder shall comprise of two parts i.e

Part-I ( Techno-Commercial Part), & Part – II ( Price Bid) as per clause 17 of this Section. (A) The Part-I ( Techno-Commercial Part ) must contain the following documents.

(a) Bid Document signed by the bidder in every page, all other Schedules / Formats enclosed in the Bid-Document ( i.e Annexure I, II, IV(A), IV(B),V(A), V(B), VI & VII duly filled in & signed by the bidder with seal. Bids containing information in formats other than our prescribed formats as above shall not be acceptable and may make the bid non-responsive.

(b) Requisite Bid Security ( EMD ) as per clause No. 4 of Section –I, IFB. In a separate envelop super scribing “Bid Security”

(c) Requisite Cost of Tender Document i.e Rs.10,500.00 inclusive of 5% VAT in shape of Bank Draft from a Public Sector Bank in favour of “CESU” Payable at Bhubaneswar if the document is downloaded from our web-site or the Original Copy of Money Receipt if the document is purchased from our Cash Counter at our Head Office.

(d) Following Documentary evidence establishing the qualifying requirements in accordance with Clause 29, ITB (SECTION-II), that the Bidder is qualified to perform the Contract if the Bid is accepted.

(i) Self Attested copies of Purchase Orders executed in last 3 Years. (ii) Self attested copies of Performance Certificates / Successful contract

Completion Certificates from above buyers preferably from Electricity

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Distribution Utilities / Government Organisations. (iii) Type Test Reports from CPRI or any Government Testing Laboratory

for the offered equipments along with the copies of drawings duly approved by the Type Testing Agency for the tests conducted not before 5 years from the date of opening of Bids.

(iv) Copies of Profit & Loss Accounts & Audited Balance Sheet indicating Turn-over for last 3 years.

(e) Power of Attorney / Board resolution indicating that the person(s) signing the

Bid have the authority to sign the Bid and as such the Bid is binding upon the Bidder during the full period of its validity, in accordance with clause 14.

(B) Part-II ( Price-Bid) : Shall contain the Price schedules ( as per prescribed format at Annexure –III ) duly filled in & signed by the bidder with seal. (This shall be submitted in a double sealed envelope separately.)

9. SUBMISSION OF BID: 9.1 The Bidder shall complete and submit the Bid Document in duplicate enclosing

all documents at clause “8” above in two sealed envelops for Original & Duplicate separately, super scribing our Tender Notice No., Tender Specification No. , Date of Opening & Description of Material Tendered.

9.2 9.2.1

BID SECURITY: The bidder shall submit bid security as a part of the bid in the prescribed format for the amount mentioned in Clause No.4 of Section –I.

9.2.2 The bid security is required to protect the Purchaser / it’s representative against the risk of bidder’s conduct, which would warrant the security’s forfeiture.

9.2.3 The bid security shall be in the following form: Bid Security in the form of a demand draft in favour of CESU issued by a

scheduled bank payable at Bhubaneswar. Unsuccessful bidder’s bid security shall be refunded back as promptly as

possible, but not later than thirty (30) days after the expiry of the period of bid validity. The successful bidder’s bid security shall be discharged upon furnishing of the performance security.

The bid security may be forfeited due to following reasons:

1) If the bidder withdraws bid during the period of bid validity specified by the bidder in the bid form.

2) In case the successful bidder fails to sign the contract in specified time and

/ or fails to submit the requisite performance Bank guarantee. 3) In case of failure to supply the equipment during the contractual delivery

period. 10. BID PRICE 10.1 Bidders have to quote for the entire quantity of equipment covered under this

specification strictly as per the enclosed format in Annexure. The total Bid Price shall also cover all the Supplier’s obligations mentioned in or reasonably to be inferred from the Bidding Documents in respect of Design, Supply, testing, inspection, Transportation to store/site, all in accordance with the requirement of Bidding Documents. The Bidder shall complete the appropriate Price Schedules included herein, stating the Unit Price for each item, all other leviable taxes & duties, transportation, insurance separately and thereby arriving at the total amount.

10.2 In case there is any increase in the number of units as compared to those mentioned in the IFB, the Contract Price shall be subject to increase

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proportionately on prorata basis. 10.3 The Price offered shall be inclusive of all costs as well as Duties, Taxes and

Levies paid or payable during implementation of the contract. If the Bidder is exempted from Excise duties, the same should be clearly mentioned with documentary evidence.

10.4 Prices quoted by the Bidder shall be “Firm” and not subject to any price adjustment during the performance of the Contract. A Bid submitted with an adjustable price clause will be treated as non-responsive and rejected outright.

11. CONTRACT PRICE 11.1 The Prices quoted for the Contract shall remain Firm as per the above

Parameters and Purchaser shall not compensate Bidder for any variations unless otherwise specifically agreed between the Purchaser and the Bidder.

11.2 In case the Purchaser, revise the scope of woks, bidders shall be compensated based on the Unit Rate agreed upon before Order placement or as per mutually acceptable rates.

12. BID CURRENCIES 12.1 Prices shall be quoted in Indian Rupees Only.

13. DOCUMENTS ESTABLISHING CONFORMITY TO THE BIDDING DOCUMENTS

13.1 The bidder shall confirm by documentary evidence of the Good’s conformity to the Bidding Documents by submitting equipment data sheets.

14. PERIOD OF VALIDITY OF BIDS 14.1 Bids shall remain valid for 180 days from the date of opening of commercial

Bids. 14.2 Notwithstanding Clause 14.1 above, the Purchaser may solicit the Bidder’s

consent to an extension of the Period of Bid Validity. The request and the responses there to shall be made in writing or by Fax.

15. ALTERNATIVE BIDS 15.1 Bidders shall submit Bids, which comply with the Bidding Documents.

Alternative bids shall not be considered for evaluation 16. FORMAT AND SIGNING OF BID

16.1 The original Bid Document and accompanying documents (as specified in Clause 9 ), clearly marked “Original Bid”, plus one copy of the Technical and un-priced Commercial Proposal must be received by the Purchaser at the date, time and place specified pursuant to Clauses 17 and 18. The Price Bid in Original should be submitted in a separate sealed envelope marked as “Price Bid”. In the event of any discrepancy between the original and the copies, the original shall govern.

16.2 The original and the duplicate copy of the Bid shall be typed or written in indelible ink and shall be signed by the Bidder or a person or persons duly authorized to sign on behalf of the Bidder. Such authorization shall be indicated by written Power-of-Attorney accompanying the Bid.

16.3 The Bid shall contain no interlineations, erasures, overwriting except as necessary to correct errors, made by the Bidder, in which case such corrections shall be initialed by the person or persons signing the Bid.

17. SEALING AND MARKING OF BIDS

17.1 Bid submission: One (1) original, one hard copy of all the Bid Documents shall be sealed and submitted to the Purchaser before the closing time for submission of the bid.

17.2 The Bid proposal should be divided into two parts and should be submitted in two separate sealed envelopes, addressed to Purchaser. All the envelopes should bear the Name and Address of the Bidder and marking for the Original

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and the duplicate copy. The envelopes should be super-scribed with the title of its contents, as follows: i) TECHNO COMMERCIAL BID ENVELOPE: Shall contain the Bid

Security, Cost of Tender Document, The Bid Document signed by the bidder in every Page, Formats at Annexure I & II, Technical Data Schedules as per our prescribed format at Annexure IV(A) , IV (B) Technical & Commercial Deviations as per our prescribed formats at Annexure V (A) & V(B), and Un priced Schedule ( Annexure – III) & All Documents establishing the qualifying norm of the tender mentioned at clause 8.1 (d) above & other credibility documents. All the above prescribed formats except the Price Schedule enclosed in the Part-I (Techno-Commercial bid) must be duly filled in & Signed by the bidder with seal failing which the bid may be considered non-responsive. The Price Schedule enclosed in the Part-I Bid is to be left blank & signed.

ii) PRICE BID ENVELOPE: Shall contain the Price schedules (As per Annexure-III) duly filled in & signed by the bidder with seal. (This shall be submitted in a double sealed envelope separately.)

17.3 The inner and outer envelopes shall: a) Be addressed to the purchaser at the following address:

CHIEF GENERAL MANAGER, (PURCHASE & STORES) CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA

2nd Floor, IDCO Towers, Janpath, Bhubaneswar – 751022 b) Bear the Project name as: “Design, Manufacture, Testing, Inspection

and Supply of Vacuum Circuit Breakers of different ratings in CESU as per Schedule of Requirement in Section-I) – Specification No. CESU/P&S / MR/279/ 2012–13. Tender Notice No . & Date of Opening

In addition to the information required in sub clause (a) and (b) above, the inner envelope shall indicate the name and address of the Bidder to enable the Bid to be returned unopened in case it is declared “Late” pursuant to Clause 20.

17.4 The Bidders have the option of sending the Bids by post/ Courier services or in person. But the Bids must reach the Purchase within the dead line prescribed in the Tender Notice. Bids submitted by Telex/Telegram/Fax will not be accepted. No request from any Bidder to the Purchaser to collect the proposals from Airlines/ Cargo Agents etc. shall be entertained by the Purchaser.

18. DEADLINE FOR SUBMISSION OF BIDS 18.1 The original Bid together with required copies, must be received by the

Purchaser at the address specified in Clause 17.3 not later than 13.00 Hrs. (IST) on the due date as indicated in the invitation for bids.

18.2 The Purchaser may, at its discretion, extend the dead line for the submission of Bids by amending the Bidding Documents, in which case all rights and obligations of the Purchaser and Bidders previously subject to the deadline will thereafter be subject to the deadline as extended.

19. ONE BID PER BIDDER

19.1 Each Bidder shall submit only one Bid either by himself. 20. LATE BIDS

20.1 Any Bid received by the Purchaser after the deadline for submission of Bids prescribed by the Purchaser, pursuant to Clause 19, will be declared “Late” and rejected outright and returned unopened to the Bidder.

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21. MODIFICATION AND WITHDRAWAL OF BIDS

21.1 The Bidder may modify or withdraw his Bid after the Bid’s submission, provided that written notice of the modification or withdrawal is received by the Purchaser prior to the deadline prescribed for submission of Bids.

21.2 The Bidder’s modification or withdrawal notice shall be prepared, sealed, marked and dispatched in accordance with the provisions of Clause 17 & 18. A withdrawal notice may also be sent by fax but must be followed by an original signed confirmation copy.

21.3 No Bid may be modified subsequent to the deadline for submission of Bids. 21.4 No Bid may be withdrawn in the interval between the deadline for submission

of Bids and the expiration of the period of Bid validity specified by the Bidder on the Bid form.

22.0 EVALUATION OF BID 22.1 PROCESS TO BE CONFIDENTIAL Information relating to the examination, clarification, evaluation and comparison

of Bids and recommendations for the award of a contract shall not be disclosed to Bidders or any other persons not officially concerned with such process. Any effort by a Bidder to influence the Purchaser’s processing of Bids or award decisions may result in the rejection of the Bidder’s Bid.

23. CLARIFICATION OF BIDS To assist in the examination, evaluation and comparison of Bids, the Purchaser

may, at its discretion, ask the Bidder for a clarification of its Bid. All responses to requests for clarification shall be in writing and no change in the price or substance of the Bid shall be sought, offered or permitted.

24. PRELIMINARY EXAMINATION OF BIDS / RESPONSIVENESS

24.1 Purchaser will examine the Bids to determine whether they are complete, whether any computational error have been made , whether required sureties have been furnished, whether the documents have been properly signed, and whether the Bids are generally in order.

24.2 Arithmetical errors will be rectified on the following basis. If there is a discrepancy between the unit price and the total price per item that is obtained by multiplying the unit price and quantity, the unit price shall prevail and the total price per item will be corrected. If there is a discrepancy between the Total Amount and the sum of the total price per item, the sum of the total price per item shall prevail and the Total Amount will be corrected.

24.3 Prior to the detailed evaluation, pursuant to Clause 25, the Purchaser will determine the substantial responsiveness of each Bid to the Bidding Documents including production capability and acceptable quality of the Goods offered, pursuant to Clause 13. Substantially responsive Bid is one, which conforms to all the terms and conditions of the Bidding Documents without material deviation.

24.4 A Bid determined as not substantially responsive will be rejected by the Purchaser and will not subsequently allowed to be made responsive by the Bidder by correction of the non – conformity.

25 EVALUATION AND COMPARISON OF BIDS 25.1 The evaluation of Bids shall be done basing on the delivered cost

competitiveness basis for each item(s) (33 KV outdoor VCB & 11KV outdoor VCB) separately.

25.2 The evaluation of the Bids shall be a stage-wise procedure. The following stages are identified for evaluation purposes:

In the first stage, the Bids would be subjected to a responsiveness check as detailed in the clause 24. The Technical Proposals and the Commercial terms & conditions of the Bidders would be evaluated and discussed as per clause 26

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of this document.

Subsequently, the Financial Proposals of Bidders shall be considered for final evaluation.

25.3 The Purchaser’s evaluation of a Bid will take into account, in addition to the Bid price, the following factors, in the manner and to the extent indicated in this Clause:

25.4 Any adjustments in price, which result from the above procedures, shall be added for the purpose of comparative evaluation only to arrive at an “Evaluated Bid Price” Bid Price, quoted by Bidders shall remain unaltered.

26.0 AWARD OF CONTRACT

26.1 CONTACTING THE PURCHASER

26.1.1 From the time of Bid opening to the time of contract award, if any Bidder wishes to contact the Purchaser on any matter related to the Bid, he should do so in writing.

26.1.2 Any effort by a Bidder to influence the Purchaser and / or in the Purchaser’s decisions in respect of Bid evaluation, Bid comparison or Contract of Award, will result in the rejection of the Bidder’s Bid.

26.2 THE PURCHASER’S RIGHT TO ACCEPT ANY BID AND TO REJECT ANY OR ALL BIDS OR TO RELAX ANY TERMS AND CONDITIONS

26.2.1 The Purchaser reserves the right to accept or reject any Bid and to annul the Bidding process and reject all Bids at any time prior to award of Contract, without thereby incurring any liability to the affected Bidder or Bidders or any obligation to inform the affected Bidder or Bidders of the grounds for the Purchaser’s action.

26.2.2 In the interest of work, the Purchaser reserves the right to relax any terms and conditions without affecting the quality & price of the equipments.

26.3 The Purchaser will award the Contract to the successful Bidder whose Bid has been determined to be the lowest- evaluated responsive Bid, provided further that the Bidder has been determined to be qualified to perform the Contract satisfactorily. The Purchaser at its option/ discretion may split the total quantity to be supplied between two or more Techno- Commercially responsive Bidders in case of the bid prices are same and early delivery is required by the owner.

26.4 THE PURCHASER’S RIGHT TO VARY QUANTITIES

The Purchaser reserves the right to vary the quantity @up to 20% i.e increase or decrease the number of materials without any change in terms and conditions at the time of placing the orders or during the execution of the Contract.

26.5 LETTER OF INTENT / NOTIFICATION OF AWARD 26.5.1 The letter of intent / Notification of Award shall be issued to the successful

Bidder(s) whose bid(s) have been considered responsive, techno-commercially acceptable and evaluated to be the Lowest (L1). The successful Bidder shall be required to furnish a letter of acceptance duly signed & sealed in each pages within 7 days of issue of the Purchaser Order.

27.0 COMPOSITE BANK GUARANTEE 27.1 Within 15 days of the receipt of Notification of Award from the Purchaser, the

successful Bidder shall furnish the Composite Bank Guarantee in the form of Bank Guarantee from a Scheduled Bank in the enclosed format in favour of the Purchaser for an amount of 10% (ten percent) of the Contract Price on a non-judicial stamp paper worth of Rs. 100/-, which shall cover 09 months over and above the guaranteed obligation from the date of issue of the Purchase order i.e. 75 months from the date of issue of the purchase order.

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If the due date of delivery period has been extended/ actual date of delivery delayed, the successful bidder shall have to furnish the extended Bank guarantee to cover the entire Guarantee period. The format for required Composite Bank Guarantee is enclosed at Annexure – II to this Bidding document.

28. CORRUPT OR FRAUDULENT PRACTICE 28.1 The Purchaser requires that the Bidders observe the highest standard of ethics

during the procurement and execution of the Project. In pursuance of this policy, the Purchaser:

a) Defines, for the purposes of this provision, the terms set forth below as follows:

(i) “Corrupt practice” means behavior on the part of officials in the public or private sectors by which they improperly and unlawfully enrich themselves and/ or those close to them, or induce others to do so, by misusing the position in which they are placed, and it includes the offering, giving, receiving, or soliciting of anything of value to influence the action of any such official in the procurement process or in contract execution; and

(ii) “Fraudulent practice” means a misrepresentation of facts in order to

influence a procurement process or the execution of a contract to the detriment of the Purchaser, and includes collusive practice amount Bidders (prior to or after Bid submission ) designed to establish Bid prices at artificial non-competitive levels and to deprive the Purchaser of the benefits of free and open competition.

b) Will reject a proposal for award if it determines that the Bidder recommended for award has engaged in corrupt or fraudulent practice in competing for the contract in question.

c) Will declare a firm ineligible, either indefinitely or for a stated period of time, to be awarded an contract if he at any time determines that the firm is engaged in corrupt or fraudulent practice in competing for, or in executing, the Contract.

28.2 Further more, Bidders shall be aware of the provision sated in the General Terms and Conditions of Contract.

29.0. LITIGATION HISTORY The Bidder should provide accurate information on any litigation or arbitration resulting

on contracts completed or under execution by him over the last three (3) years. A consistent history of awards involving litigation against the Bidder or any Partner of a consortium may result in disqualification of Bid.

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SECTION –III

GENERAL TERMS AND CONDITIONS OF CONTRACT (GTCC)

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SECTION – III GENERAL TRMS AND CONDITIONS OF CONTRACT (GTCC)

1.0 General Instructions: 1.01 All the Bids shall be prepared and submitted in accordance with these

instructions. 1.02 Bidder shall bear all costs associated with the preparation and delivery of its

Bid, and the Purchaser will in no case shall be responsible or liable for these costs.

1.03 The Bid should be submitted by the Bidder in whose name the bid document has been issued and under no circumstances it shall be transferred / sold to the other party.

1.04 The Purchaser reserves the right to request for any additional information and also reserves the right to reject the proposal of any Bidder, if in the opinion of the Purchaser, the data in support of Tender requirement is incomplete.

1.05 The Bidder is expected to examine all instructions, forms, terms & conditions and specifications in the Bid Documents. Failure to furnish all information required in the Bid Documents or Submission of a Bid not substantially responsive to the Bid Documents in every respect may result in rejection of the Bid. However, the Purchaser’s decision in regard to the responsiveness and rejection of bids shall be final and binding without any obligation, financial or otherwise, on the Purchaser.

2.0 Definition of Terms: 2.01 “Purchaser /” shall mean Chief Executive Officer of Central Electricity

Supply Utility of Orissa (CESU) on whose behalf this bid enquiry is issued by its authorized representative / officers.

2.02 “Bidder / Contractor” shall mean the firm who quotes against this bid document issued by the Purchaser. “Contractor” or “Seller” shall mean the successful Bidder and / or Bidders whose bid has been accepted by the Purchaser and shall include his heirs, legal representatives, successors and permitted assigns wherever the context to admits.

2.03 “Site” shall mean the Electricity Distribution Area of CESU. 2.04 “Specification” shall mean collectively all the terms and stipulations

contained in those portions of this bid document known as Instruction to Bidder, Bid form and other forms as per Section –V, General Conditions of Contract, Specifications and the Amendments, Revisions, Deletions or Additions, as may be made by the Purchaser from time to time.

2.05 “Letter of Intent” shall mean the official notice issued by the Purchaser notifying the Contractor that his proposal has been accepted and it shall include amendments thereto, if any, issued by the Purchaser. The “Letter of Intent” issued by the Purchaser shall be binding on the “Contractor”. The date of detailed Purchase Order shall be taken as the effective date of the commencement of contract.

2.06 “Month” shall mean the calendar month and “Day” shall mean the calendar day.

2.07 “Codes and Standards” shall mean all the applicable codes and standards as indicated in the Technical Specification.

2.08 “Offer Sheet” shall mean Bidder’s firm offer submitted to Purchaser in accordance with the specification.

2.09 “Contract” shall mean the “Detailed Purchase Order” issued by the Purchaser.

2.10 “Contract Price” shall mean the price referred to in the “Detailed Purchase Order”.

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2.11 “Contract Period” shall mean the period during which the “Contract” shall be

executed as agreed between the Contractor and the Purchaser in the Contract inclusive of extended contract period for reasons beyond the control of the Contractor and / or purchaser due to force majeure.

2.12 “Goods” shall mean all items to be supplied under Purchase Order whether raw materials, processes materials, equipment, fabricated products, drawings or other documents as applicable.

2.13 “Store” shall mean the Purchaser’s store as defined elsewhere in this tender document.

2.14 “Project” / “Unit” shall mean supply of 33KV & 11KV VCB as per enclosed technical specification.

2.15 “Consignment” shall mean the total quantity of Materials/Equipments supplied within the specified days of the issue of the Purchase Order as mentioned in the Delivery Schedule.

3.0 Contract Documents & Priority : 3.01 Contract Documents : The Specification, terms and conditions of the

contract shall consist solely of these Tender conditions and offer sheet. 3.02 Priority : Should there be any discrepancy between any term hereof and any

term of the Offer Sheet, the terms of these tender document shall prevail. 4.0 Scope of Work: 4.01 The “Scope of Work” shall be on the basis of Bidder’s responsibility,

completely covering the obligations, responsibility and workmanship, provided in this Bid Enquiry whether implicit or explicit.

4.02 The Purchaser reserves the right to vary the quantity @ Up 20% i.e increase or decrease, at the time of placing order or during project execution.

4.03 All relevant drawings, data and instruction manuals and other necessary inputs shall be under the scope of contract.

5.0 General Requirements: 5.01 The seller shall supply, deliver best quality goods & conduct the testing at

their works of highest standards. 6.0 The seller shall be responsible & shall comply with the provisions of all

statutory acts i.e Electricity Act 2003, Indian Electricity Rules 1956. 7.0

Inspection & Testing:

i) The Purchaser’s representative shall be entitled at all reasonable times during manufacture to inspect examine and test on the Contractor’s premises the materials and workman-ship of all equipment to be supplied under this contract and if part of the said equipment is being manufactured else where in any Sub-Contractor’s premises, the Contractor shall obtain for the Purchaser’s representative, permission to inspect, examine and test as if the equipment were being manufactured on the Contractor’s premises. Such inspection, examination and testing shall not release the Contractor from his obligations under the contract. However, purchaser reserves the right to engage third party agent for conduct the aforesaid inspection.

ii) The Contractor shall give to the Purchaser adequate time/ notice (minimum of two weeks time) in writing for inspection of materials indicating the place at which the equipment is ready for testing and inspection and shall also furnish the Routine Test Certificates and Packing List along with offer for inspection to the Purchaser indicating the quantity which can be delivered in full truck load / Mini truck load to facilitate issue of dispatch instruction.

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iii) Where the contract provides for test on the Premises of the Contractor or of

any of his Sub-Contractors, the Contractor shall provide such assistance, labour, materials, electricity, fuel and instruments as may be required or as may be reasonably demanded by the Purchaser’s representative to carryout such tests efficiently. The Contractor is required to produce Shop Routine Test Certificates before offering their materials for inspection

iv) After completion of the tests as indicated above, the Purchaser’s representative shall forward the test results to the Purchaser. If the test results confirm to the specific standard, the Purchaser shall approve the test results and communicate the same to the Contractor in writing. The Contractor shall provide at least three copies of the test certificates to the Purchaser.

v) The Purchaser has the right to have the test carried out at his own cost by an independent agency whenever there is a dispute regarding the quality of supply. In such case the report of the independent agency shall be binding to the supplier.

vi) The Purchaser at its discretion may re-test the supplied Equipments at its own laboratory or laboratory of his choice for reconfirmation of the test results.

8.0 QUALITY ASSURANCE PLAN:

8.1 The tenderer shall invariably furnish following information along with his offer, failing which his offer shall be liable for rejection, information shall be separately given for individual type of equipment offered.

(i) Statement giving list of important raw materials names of sub-suppliers for the raw materials list of standards according to which the raw materials are tested. List of tests normally carried out on raw materials in presence of tenderer’s representative, copies of test certificates.

(ii) Information and copies of test certificates as in (i) above in respect of bought out accessories.

(iii) List of manufacturing facilities available (iv) Level of automation achieved and list of areas where manual processing exists (v) List of areas in manufacturing process, where state inspections are normally

carried out for quality control and details of such tests and inspections. (vi) Special features provided in the equipment to make it maintenance free (vii) List of testing equipments available with the tenderer for final testing of equipment

specified and test plant limitation. If any, vis-à-vis the type, special acceptance and routine tests specified in the relevant standards. These limitations shall be very clearly brought out in schedule of deviations from specified test requirements.

8.2 The successful tenderer shall within 30 days of placement of order, submit following information to the purchaser.

(i) List of raw materials as well as bought out accessories and the names of sub-suppliers selected from those furnished along with offer.

(ii) Type test certificates of the raw material and bought out accessories (iii) Quality assurance Plan (QAP) with hold points for purchaser’s inspection. The

quality assurance plan and purchasers hold points shall be discussed between the Purchaser and Supplier before the QAP is finalized.

8.3 The successful bidder shall submit the routine test certificates of bought out accessories and central excise passes for raw material viz oil, copper, aluminium, conductors, insulating materials, core material at the time of routine testing of the fully assembled equipment.

9.0 DOCUMENTATION : 9.1 All drawings shall conform to International Standards Organization (ISO) “ A” Series. All drawings shall be in ink and suitable for micro filming. All dimensions

and data shall be in S.I. units.

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9.2 List of drawings and documents The bidder shall furnish four sets of following drawings duly approved earlier by the

Type Testing Agency along with his offer. (a) General outline and assembly drawings of the equipment i.e. breaker,CTs, PTs etc. (b) Graphs showing the performance of equipments in regard to magnetization

characteristics ( c ) Sectional views showing (i) General Construction features (ii) The materials/gaskets/sealing used. (iii) The method of connection of the primary/secondary winding to the

primary/secondary terminals etc. (iv) Porcelain used and its dimensions along with the mechanical and electrical

characteristics (d) Arrangement of terminals and details of connection studs provided. (e) Name plate (f) Schematic drawing (g) Type test reports conforming to above design / drawings offered for supply. (h) Test Reports, literature, pamphlets of the bought out items and raw materials. 9.3 The successful tender shall, within 2 weeks of placement of order, submit three

sets of final versons of all the above said drawings for purchaser’s approval. The purchaser shall communicate his comments/ approval on the drawings to the supplier within four weeks. The supplier shall, if necessary, modify the drawings and resubmit three copies of the modified drawings for owners approval with in two weeks from the date of owner’s comments. After receipt of owner’s approval, the supplier shall within two weeks, submit 12 prints and two good quality reproducible of the approved drawings for purchasers use.

9.4 Six sets of the type tests reports, duly approved by the purchaser, shall be submitted by the supplier for distribution before commencement of supply . Adequate copies of acceptance and routine test certificate, duly approved by the purchaser shall accompany the dispatch consignment.

9.5 The manufacturing of the equipments shall be strictly in accordance with the approved drawings and no deviation shall be permitted without the written approval of the purchaser. All manufacturing and fabrication work in connection with the equipment prior to the approval of the drawing shall be at the supplier’s risk.

9.6 16 sets of nicely printed and bound volumes of operation, maintenance and

erection manuals in English language, for each type and rating of equipment supplied shall be submitted by the supplier for distribution, prior to the dispatch of the equipment. The manual shall contain all the drawings and information required for erection, operation and maintenance of the circuit breaker. The manual shall also contain a set of all the approved drawings, type test reports etc.

9.7 Approval of drawings/ work by purchaser shall not relieve the supplier of his responsibility and liability for ensuring correctness and correct interpretation of the drawings for meeting the requirement of the latest revision of applicable standards, rules and codes of practices. The equipment shall conform in all respects to high standards of engineering, design, workmanship and latest revisions of relevant standards at the time of ordering and purchaser shall have the power to reject any work or materials which, in his judgment is not in full accordance therewith.

10.0 PACKING AND FORWARDING: The equipment shall be packed in crates suitable for vertical/ horizontal transport

as the case may be, and suitable to withstand handling during transport and outdoor storage during transit. The supplier shall be responsible for any damage to the equipment during transit, due to improper and inadequate packing. The easily damageable material shall be carefully packed and marked with the appropriate caution symbol. Wherever necessary, proper arrangement for lifting, such as lifting hooks etc. shall be provided. Any material found short inside the packing cases shall be supplier by supplier without any extra cost.

Each consignment shall be accompanied with a detailed packing list containing

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the following information. (a) Name of the consignee (b) Details of consignment ( c ) Destination (d) Total weight of consignment (e) Sign showing upper/ lower side of the crate (f) Handling and unpacking instructions (g) Bill of materials indicating contents of each package 10.3 The supplier shall ensure that the packing list and bill of material are approved by

the purchaser before dispatch. 11.0 Training Facilities : The Contractor shall provide all possible facilities for training of Purchaser’s

Technical personnel, when deputed by the Purchaser for acquiring first hand knowledge in assembly of the equipment and for it’s proper operation and maintenance in service.

12.0 Rejection of Materials: In the event, any of the materials / equipment supplied by the Contractor is found

defective due to faulty design, bad workmanship, bad materials used or otherwise not in conformity with the requirements of the Specification, the Purchaser shall either reject the materials / equipment or ask the Contractor in writing to rectify the same. The Contractor on receipt of such notification shall either rectify or replace the defective equipment free of cost to the Purchaser. If the Contractor fails to do so, the Purchaser may :

a)

b)

c)

At its option replace or rectify such defective equipment and recover the extra costs so involved from the Contractor plus fifteen percent and / or. Terminate the contract for balance work / supplies with enforcement of penalty Clause as per contract for the un-delivered goods and with forfeiture of Performance Guarantee/ Composite Bank Guarantee. Acquire the defective equipment / materials at reduced price considered equitable under the circumstances.

13.0 Experience of Bidders : The bidders should furnish information regarding experience particularly on the

following points : i) Name of the manufacturer :

ii) Standing of the firm and manufacture of equipment quoted : iii) Description of equipment similar to the quoted, supplied and installed during

the last 3 (three) years with the name (s) of the party (s) to whom supplies were made.

iv) Details as to where installed etc. v) Testing facilities at manufacturer’s work with copies of calibrated certificates

of the major testing equipment. vi) If the manufacturer is having collaboration with other firm(s), details

regarding the same: vii) A list of Purchase orders, executed during the last three years along with

user’s certificate and copies of purchase orders.

Bids may not be considered if the past manufacturing experience is found to be un-satisfactory or is of less than 3 years as on the date of opening of the bid.

14.0 Language and Measures : All documents pertaining to the contract including Specifications, Schedule, Notice,

Correspondence, Operating & Maintenance instructions, Drawings or any other writing shall be written in English language. The metric system of measurement shall be used exclusively in this contract.

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15.0 Deviation from Specification: It is in the interest of the Tenderers to study the Specification, drawing, commercial

terms etc. specified in the tender schedule thoroughly before tendering so that, if any deviations are made by the Tenderers, the same are to be prominently brought out in the Non- Compliance Schedule Format enclosed in this document at Annexure – V(A) & V(B). Unless deviations in scope, technical and commercial stipulations are specifically mentioned in the prescribed Non-complaince Schedule, it shall be presumed that the Tenderer has accepted all the conditions, stipulated in the tender Specification without any deviation, notwithstanding anything mentioned at any other document.

16.0 Price Basis: 16.01

(a) Bidder shall quote “FIRM” price with detail breakup of the total offered price.

The breakup of prices shall indicate all types of taxes, Duties and other Levies of whatsoever nature indicated separately and clearly, packing & forwarding, transportation to store including transit insurances and entry tax. The rates of taxes & duties shall also be clearly mentioned in the price bid. Any column left blank/nil shall be treated as included in the unit landing price and the cost of the same shall be borne by the bidder(s). Exemption from any duties/taxes, if any, shall be supported with relevant documentary evidence.

(b) The above Prices shall also include loading at factory site & unloading at Purchaser’s Stores. Price evaluation will be based on total landing cost, taking into account all taxes and duties.

17.0 Terms of Payment: 100 % value of each consignment will be paid within 30 days of receipt of

materials in good conditions at stores and verification there of subject to approval of the Guarantee certificates & Test Certificates and submission & acceptance of Performance Bank Guarantee equivalent to 10 % of Total Contract Price on non-judicial stamp paper worth Rs.100 in the prescribed format from a Scheduled Bank encashable at Bhubaneswar only. Or else an equivalent amount of 10 % of the Total Contract Price shall be deducted from the invoice of the first consignment & the same shall be refunded after submission and approval of the required Performance Bank Guarantee or expiry of Guarantee Period which ever is earlier.

18.0 Price Validity: 18.01 All bids submitted shall remain valid, firm and subject to unconditional

acceptance by Purchaser for 180 days post bid-date. For award of Contract, the prices shall remain valid and firm till contract completion.

19.0 Guarantee: 19.01 The bidder shall guarantee for satisfactory performance of the

equipments/materials for a minimum period of 60 months from the date of Commissioning or 66 months from the date of receipt of last consignment whichever is earlier. In the event of any defect in the equipment/ materials arising out of faulty design, inferior quality of raw material used or bad workmanship within the guarantee period, the Seller shall guarantee to replace/ repair to the satisfaction of the Purchaser the defective equipments free of cost. Should however, the manufacturer fails to do so within a reasonable time, the Purchaser reserves the right to recover the amount from the seller either from the bills pending or may recover from the Performance Guarantee submitted by the firm. Seller shall give a Performance Bank Guarantee in favour of the Purchaser for 10% of the order value valid for 270 days over and above the guarantee obligation.

19.02 If during the defect liability period any services performed found to be defective, these shall be promptly rectified by seller at its own cost (including

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the cost of dismantling and reinstallation) on the instruction of Purchaser. 20.0 Release: The seller’s Performance Bank Guarantees / Assignable Bank Guarantee

will be released without interest within thirty (30) days from the last date up to which the Performance Bank Guarantee has to be kept valid (as defined in Clause 16.01 ).

21.0

TECHNICAL INFORMATION / DATA

The Purchaser and the Contractor, to the extent of their respective rights permitting to do so, shall exchange such technical information and data as is reasonably required by each party to perform its obligations and responsibilities. The Purchaser and the Contractor agree to keep each other in confidence and to use the same degree of care as he uses with respect to his own proprietary data to prevent its disclosure to third parties of all technical and confidential information. The technical information, drawings, records and other document shall not be copied, transferred, traced or divulged and / or disclosed to third party in full / part nor misused in any other form. This technical information, drawing etc. shall be returned to the Purchaser with all approved copies and duplicates. In the event of any breach of this Contract, the Contractor shall indemnify the Purchaser against any loss, cost of damages of claim by any party in respect of such breach.

22.0 Effective Date of Commencement of Contract : 22.01 The date of the issue of the detailed Purchase order shall be treated as the

effective date of the commencement of Contract. 22.02 The bidder shall quote the basic price as well as all taxes & duties as per the

enclosed format for bid prices. 23.0 Penalty: 23.01 If supply of items / equipments is delayed beyond the supply schedule as

stipulated in purchase order, then the seller shall be liable to pay to the Purchaser as penalty for delay, a sum of 0.5% (half percent) of the contract price for every week delay or part thereof.

23.02 The total amount of penalty for delay under the contract will be subject to a maximum of five percent (5%) of the contract price.

23.03 The Purchaser may, without prejudice to any method of recovery, deduct the amount for such damages from any amount due or which may become due to the seller or from the Performance Bank Guarantee or file a claim against the seller.

24.

VALIDITY OF THE ORDER: The Purchase Contract is valid for 10 weeks beyond the schedule date of last Consignment mentioned in the Delivery Schedule , unless otherwise extended by the Competent Authority. The Purchase Contract shall stand cancelled automatically beyond the validity period without any correspondences and liabilities to the CESU.

25. PACKING :

The materials / equipments shall be packed by the seller suitably as per the standard procedure for safe transport to the site / store. The cases shall be clearly marked showing distinctly the name and address of the consignee. In case of special instructions, such as “this end up”, “fragile”, “handles with care” etc., the same shall be clearly displayed on the cases.

26. Commissioning spares : The sellers shall replace, free of cost, any spares which may be found

defective by the buyer during commissioning. 27.0 The Laws and Jurisdiction of Contract : 27.01 The laws applicable to this Contract shall be the Laws in force in India.

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27.02 All disputes arising in connection with the present Contract shall be settled amicably by mutual consultation, failing which shall be finally settled as per the rules of Arbitration and Conciliation Act, 1996 at the discretion of Purchaser. The jurisdiction of arbitration shall be at Bhubaneswar , Orissa, India only.

28.0 Events of Default : 28.1 Events of Default. Each of the following events or occurrences shall

constitute an event of default (“Event of Default”) under the Contract : (a) Seller fails to accept the Purchase Order within the stipulated provision

of the tender specification. (b) Seller fails or refuses to pay any amount due under the Contracts. (c) Seller fails or refuses to deliver Commodities conforming to his Bid

document/ specifications, or fails to deliver Commodities and, or execute the works assigned to them within the period specified in P.O or any extension thereof.

(d) Seller becomes insolvent or unable to pay its debts when due, or commits any act of bankruptcy, such as filing any petition in any bankruptcy, winding-up or reorganization proceeding, or acknowledges in writing its insolvency or inability to pay its debts; or the Seller’s creditors file any petition relating to bankruptcy of Seller;

(e) Seller otherwise fails or refuses to perform or observe any term or condition of the Contract and such failure is not remediable or, if remediable, continues for a period of 30 days after receipt by the Seller of notice of such failure from Purchaser.

29.0 Consequences of Default: (a) If an Event of Default occurs and would be continuing, Purchaser may forthwith

terminate the Contract by written notice. In the Event of Default, Purchaser may, without prejudice to any other right granted to it by law, or the Contract, take any or all of the following actions;

i)

ii)

present for payment, to the relevant bank the Contract Performance Bank Guarantee. Recover any losses and / or additional expenses from the pending bill, Purchaser may incur as a result of Seller’s default.

30.0

Force Majeure :

30.01 The term “Force Majeure” as employed herein include, acts of God or force of nature, landslide, earthquake, flood, fire, lightning, explosion, major storm (hurricane, typhoon, cyclone etc. ) or major storm warning, tidal wave, shipwreck and perils of navigation, act of war (declared or undeclared ) or public enemy, strike (excluding employee strikes, lockouts or other industrial disputes or action solely among employee of Contractor or its subcontractors ) act or omission of Sovereign States or those purporting to represent Sovereign States, blockade, embargo, quarantine, public disorder, sabotage, accident or similar events beyond the control of the parties or either of them.

Force Majeure shall not include occurrences as follows : 1. Late delivery of materials caused by congestion of Seller’s facilities or elsewhere,

and oversold condition of the market, inefficiencies, or similar occurrences. 2. Late performance by Seller and / or Sub-Seller caused by unavailability of raw

materials, supervisors or labour, inefficiencies of similar occurrences. 3. Mechanical breakdown of any item of Seller’s or its Sub-Seller’s equipment, plant

or machinery. 4. Delays due to ordinary storm or inclement weather or

5. Non-conformance by Sub-Seller. Unless the delay arises out of a Force Majeure occurrence and is beyond both

Seller’s and Sub-Seller’s or Seller’s control and an alternate acceptable source of services, equipment or material is unavailable . Additionally, Force Majeure shall not include financial distress of Seller or any Sub-Seller.

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,,

30.02 In the event of either party being rendered unable by Force Majeure to perform any obligation required to be performed by them under the Contract, the relative obligation of the party affected by such Force Majeure shall be suspended for the period during which such cause lasts. Time for performance of the relative obligation suspended by Force Majeure shall then stand extended by the period for which the cause lasts.

30.03 Upon the occurrence of any Force Majeure event, the party so affected in the discharge of its obligation shall promptly, but no later than seven (7) days give written notice of such even to the other party. The affected party shall make every reasonable effort to remove or remedy the cause of such Force majeure or mitigate its effect as quickly as possible. If such occurrence results in the suspension of all or part of the work for a continuous period of more than 10( ten) days, the parties shall meet and determine the measures to be taken.

30.04 Any delay or failure in performance by either party hereto shall not give rise to any claims for damages or loss of anticipated profits if and to the extent, such delay or failure is caused by Force Majeure.

31.0 EMBOSSING / PUNCHING / CASTING: 31.1 The all equipments and materials supplied shall bear distinct mark of “Name of the

CESU, PO Order No. & Date” by a way of embossing / punching / casting etc. This should be clearly visible to naked eye.

32.0 NON COMPLIANCE SCHEDULES: On this schedule the bidder shall provide a list of non compliance with reference to this specification in prescribed Formats enclosed at Annexure- V (A) & V (B). Where there are no deviation from specifications, the bidder shall so indicate by stating “ No Deviations” in these Formats. Unless deviations in scope, technical and commercial stipulations are specifically mentioned in the prescribed format enclosed at Annexure V(A ) & V (B), it shall be presumed that the Tenderer has accepted all the conditions, stipulated in the tender Specification without any deviation, notwithstanding anything mentioned at any part of the Tender document. 33.0 TEST CERTIFICATES SCHEDULE: On this schedule a list of the test certificates included with the bid shall be provided. This list should include type test certificates and samples routine test reports. Each certificate listed shall be referred to the relevant specification clause and item of equipment to which the test applies.

Clause No. Type Test Certificate or Routine Test Report

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SECTION- IV A

TECHNICAL SPECIFICATION FOR

33KV OUTDOOR VACCUM CIRCUIT BREAKERS FOR FEEDER PROTECTION

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SECTION- IV (A) TECHNICAL SPECIFICATION FOR 33KV OUTDOOR VACUUM CIRCUIT BREAKERS for

FEEDER PROTECTION

1. SCOPE 1.1 This specification covers design, engineering, manufacture, testing, inspection

before dispatch packing, forwarding, transportation, insurance during transit, delivery to site/ stores of 33KV Outdoor Vacuum Circuit Breakers including CT, PT, Out door CR panel & G.I. structure for use the 33/11KV primary substations under the distribution networks of CESU.

1.2 All vacuum circuit breakers must be manufactured by ISO 9000 certified

Organization and shall have been type tested at International reputed laboratory/ CPRI/NABL approved laboratory within five years as on the date of bid opening.

1.3 The scope of supply includes the provision of type tests wherever required. Rates

for type tests shall be given in the appropriate price schedule of the bid document and will be considered for evaluation. The purchaser reserves the right to waive type tests.

1.4 The scope also includes the circuit breaker and current and potential transformers,

supporting structures, operating mechanism, local/ remote control cabinet, relay control panel, foundation bolts, all the accessories and auxiliary equipment mandatory spares and special tools for satisfactory installation and operation.

1.5 The circuit breakers shall confirm in all respects to the highest standards of

engineering, design, workmanship, this specification and the latest revisions of relevant standards at the time of offer and the purchaser shall have the power to reject any work or materials, which, in his judgement, is not in full accordance therewith.

2. STANDARDS Expect where modified by this specification, the circuit breakers and the

accessories shall be designed, manufactured and tested in accordance with latest editions of the following standards.

IEC/ISO/BS IS Subject IEC:56 IS : 13118 High voltage alternating current circuit breakers general

requirement. IEC:694 IS : 12729 Common clauses of high voltage switch-gear and control

gear standards (for voltage exceeding 1000 V). IEC:60 IS : 9135 High Voltage testing techniques. IEC:427 IS:13516 Method of synthetic testing of HV .A.C circuit breakers. IEC: 1233 HV. AC. Circuit breakers- inductive load switching. IEC: 17A/CD:474 HV. AC. Circuit breakers- capacitive switching. IEC:529 IS: 13947 Degree of protection provided by enclosure.

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IEC:137 IS: 2099 Insulating bushing for A.C. voltages above 1000V IEC:233 IS : 5621 Hollow insulators for use in electrical equipment &

testing. IEC:273 IS: 5350 Characteristics of indoor and outdoor post insulators for

systems with nominal voltages greater than 1000V. IEC:815 IS: 13134 Guide for selection of insulators in respect of polluted

conditions. IEC: 34 IS : 996 A.C motors ISO:1460 BS:729 IS:2629 Hot dip galvanizing IS:2633 Method of testing uniformity of zinc coated articles. IS: 5 Colour for ready missed paints and enamels IS: 6005 Code of practice for phosphating or iron and steel. IEC: 227 IS:1554 P.V.C Insulated cables for voltages up to and including

1100 Volt. IEC:269 IS:13703 Low voltage fuses for voltages not exceeding 1000volt. ISO:800 IS:1300 Phenolic moulding materials. IS:13118 Guide for uniform marking and identification of

conductors and apparatus terminals. IEC: 185 IS: 2705 Current transformers. IEC: 296 IS: 335 Specification for unused insulating oil for transformer and

switchgear. IEC:186 IS: 3156 Potential transformers. CBIP Technical Report No. 88 revised July, 1996 read with amendment issued (April, 99, September, 99 and also any other amendment thereafter)

Specification for AC Static Electrical Energy Meter.

This list is not to be considered exhaustive and reference to a particular standard

or recommendation in this specification does not relieve the Supplier of the necessity of providing the goods and services complying with other relevant standards or recommendations.

3. REQUIREMENTS The circuit breakers to be supplied against this specification shall be required to

control the 33 KV feeder of 33/11 KV sub-stations (incoming 33KV feeders) or Bus coupler or the outgoing feeders in these sub-stations. The circuit breakers shall be suitable for 3 phase 50Hz solidly grounded neutral system and shall have normal current carrying capacity and symmetrical short circuit current breaking capability as mentioned hereunder.

The required 33KV Vacuum Circuit Breakers suitable for outdoor installations are

to be quoted by Manufacturers only with a valid ISO 9000 certification.

3.1 BASIC TECHNICAL REQUIREMENTS: The vacuum circuit breakers are required to meet the following basic technical

requirements. (Reference standards IEC:56, IS:13118 and associated standards listed in this specification.

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Basic Technical Requirements

Sl. No

Particulars Requirements

1 Service type Outdoor 2 No. of Poles 3 3 Nominal system voltage 33KV 4 Highest system voltage 36KV 5 Rated normal current at 500C i) For Bus-bar of Circuit Breaker 1600A ii) For Interrupter 2000A iii) For Outgoing Feeders - 6 Rated short circuit breaking current (rms) 25KA 7 Rated short circuit making current (peak) 62.5KA 8 Rated short time current withstand capability for 3 sec. 25KA (Interrupter) 9. Rated insulation level: i) One minute power frequency withstand voltage to earth

(wet and dry) rms 70KV

ii) Impulse withstand voltage to earth with 1.2/50sec, wave of +ve and –ve polarity (Peak)

170KV

10 First – pole – to clear factor 1.5 11 Rated operating sequence (for auto reclosing) O-0.3 Sec- CO-3 min-

CO 12 Maximum break time 3 cycles 13 Rated out of phase breaking current 25% of the

symmetrical short circuit breaking current

14 Maximum pole scatter 10 milli seconds 15 Rated Auxiliary supply for spring charge motor, lamp &

heater circuit. 230V A.C

16 Rated supply voltage for trip/close coil 24V D.C 17 Minimum creepage distance (mm) As Per IS 18 Minimum protected creepage distance (mm) As Per IS

4. SERVICE CONDITIONS: The service conditions shall be as follows: Maximum altitude above sea level 1,000m Maximum ambient air temperature 500C Maximum daily average ambient air temperature 350C Minimum ambient air temperature 50C Maximum temperature attainable by an object exposed to the

sun 600C

Maximum yearly wet average ambient temperature 320C Maximum relative humidity 100%

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Average number of thunderstorm days per annum

(isokeraunic level) 70

Average number of rainy days per annum 120 Average annual rainfall 1500mm Maximum wind pressure 260Kg/m2 5. 33 KV VACUUM CIRCUIT BREAKERS 5.1 General The circuit breakers shall be structure mounted open type with vacuum as

interrupting media incorporating separate interrupters of 2000 A rating for each phase mounted on single frame. There shall be a common drive mechanism actuating the interrupters, which must work in synchronism. These breakers shall be provided with suitable local control while provision shall be made for remote control.

The circuit breakers shall be fitted with spring mechanism. The inherent design of

these circuit breakers shall be such that they shall satisfactorily perform all test duties and interrupt out-of-phase current and produce very low over voltage (<2.0p.u.) on all switching circuits, capacitive and inductive to IEC:56, IS:13118 and other associated standards mentioned in the clause of this specification.

The terminal pads shall have Bimetallic / alluminium alloy cast. The design of the

circuit breakers shall be such that inspection and replacement of contracts, coils, vacuum bottles and any worn or damaged components can be carried out quickly and this ease. The contract gaps shall be adjustable to allow for wear.

The mechanism and the connected interrupters shall satisfy the mechanical

endurance requirements of IEC:56, IS:13118 and all additional requirements specified herein.

5.2 Porcelain Insulator External parts of the circuit breakers, which are under continuous electrical stress,

shall be of hollow porcelain. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC:815 or IS: 13134 and shall be suitable for the worst environmental conditions specified in this specification. The creepage distance across the interrupting chambers shall suite the outdoor service conditions mentioned in the relevant standards for heavily polluted atmosphere and shall be not less than 900 mm with protected creepage distance 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed. The insulators shall comply with IS:5621 and tested in accordance with IEC:233.

All porcelain whether, used on the interrupting chamber or on the support insulator

shall have the following properties:

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Higher strength, homogeneity, uniform glaze, free from cavities and other flaws and high quality uniform finish porcelain components and shall withstand the maximum expected static and dynamic loads to which the circuit breakers may be subjected during their service life.

5.3 Interrupting media 5.3.1 Vacuum: In vacuum circuit breakers, facilities shall be provided for monitoring the contract

erosion and any change in contact gap. The vacuum bottles shall be easily replaceable on site and the mechanism shall be conveniently adjustable to permit resetting the contact gap.

The vacuum circuit breaker poles shall be sealed to prevent contamination of the

spaces surrounding the interrupters. The Bidder shall demonstrate how this is achieved by supplying technical details with the bid.

5.4 Auxiliary contracts 12 auxiliary contacts (6N.O.+6N.C.) of 24 Volt D.C grade and 10 amps DC rating

shall be provided in each circuit breaker. 5.5 Indication A mechanically operated circuit breaker position indicator of non corroding

material shall be provided in a location visible from the operating side of the breaker without the necessity to open the mechanism door. The word ‘OFF’ in white letter on green background shall be used to indicate that the breaker is in the opening position and the word ‘ON’ in white letters on a red background to indicate that the breaker is in the closed position. The drive for the device shall be positive in both directions and provision shall be made for local and remote electrical indication.

Indication of spring charging condition shall be provided as mentioned in this

specification. Mechanical counters to record the number of closing operations shall be provided for each circuit breaker mechanism.

5.7 Operation and controls The breaker shall normally be operated by remote electrical control with electrical

tripping by 2 nos shunt trip coil. Provision shall be made for local electrical operation and mechanical operation.

The following facilities shall be provided in the circuit breaker local control cabinet: LOCAL/ REMOTE selector switch of stay put type. The selection of ‘local’

operation shall inhibit the operation of the breaker from any remote source. ON/NEUTRAL/ OFF control switch or ON and OFF push buttons. The push

buttons shall be momentary contract type with rear terminal connections. The close push button shall be of green colour and the open push button red colour.

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MECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation

in the event of failure of electrical supplies. The device shall be accessible without opening any access doors and distinctly labeled. It shall be shrouded and protected against inadvertent operation.

Means shall be provided for manual operation of these circuit breakers

during failure of auxiliary power in addition to electrical operation. Means shall be provided to prevent the mechanism from responding to a

close signal when the trip coil is energized or to reclosing from a sustained close signal either opening due to a trip signal or failure to hold in the closed position.

The circuit breaker shall be able to perform 10,000 operating cycles at no load in

accordance with IEC:17A/474/CD for circuit breakers for auto reclosing duties. 6. CURRENT TRANSFORMERS Current transformers, three per circuit breaker, shall be of outdoor, single phase

oil immersed dead tank type and shall comply with IEC:185 and IS:2705, suitable for operation in hot and humid atmospheric conditions described in service condition. They shall be mounted on the bracket. The CT tank should be Hot Dip galvanized as per relevant ISS to prevent corrosion of all exposed metal parts.

6.1 Core High grade non- ageing cold rolled grain oriented (CRGO M4 or better grade)

silicon steel of low hysteresis loss and permeability shall be used for the core so as to ensure specified accuracy at both normal and over currents. The flux density shall be limited to ensure that there is no saturation during normal service.

The instrument security factor of the core shall be low enough so as not to cause

damage to the instruments in the event of maximum short circuit current. 6.2 Windings The secondary windings shall be made of electrolytic copper with suitable

insulation. The conductor shall be of adequate cross- section so as to limit the temperature rise even during short circuit conditions. The insulation of windings and connections shall be free from composition liable to soften, coze, shrink or collapse during service.

Polarity shall be indelibly marked on each current transformer and at the lead and

termination at associated terminal blocks. CTs with multi ratio winding shall be clearly tabulated to show the connections required for different ratios. Similar numbers shall be marked on terminal block arrangement and wiring diagram. Apart from the above marking and those to be provided as per IEC 185 or IS 2705, other markings shall be provided in consultation with owner.

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The continuous current rating of the primary winding shall be one hundred and fifty percent of the normal rated current. Secondary windings of current transformers shall be used for metering, instrumentation and protection and shall be rated for continuous current of one hundred and fifty percent of normal rated current of primary winding.

6.3 Construction The current transformer enclosures shall be made of high quality steel and shall

be hot dip galvanized and shall be able to withstand and stresses occurring during transportation and the terminal and mechanical stresses resulting from maximum short circuit current in service. The primary winding and terminals shall be in a tank and supported by a hollow porcelain insulator. The secondary connection shall be conduited through the hollow insulator and terminated in a terminal box mounted on the base plate.

6.4 Hermetic sealing Each current transformer shall be supplied filled with insulating oil complying with

IEC:296 or IS:335 and shall be hermetically sealed to prevent atmosphere coming in contact with oil, avoiding frequent filtration and change of oil. Nitrogen or any oil inert gas above the oil level shall be provided to permit expansion and contraction of oil without any contract with the atmosphere.

The current transformers shall have provision for draining and re-filling insulation

oil after drying. 6.5 Insulating oil The current transformer shall be complete with new insulating oil. The quantity of

insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated in the bid. The oil shall conform to the requirements of latest issue of IEC:296 or IS:335.

6.6 Fittings and accessories Fittings and accessories listed below shall be supplied with each current

transformer: Oil level gauge; Oil filling hole and cap; Pressure relief device; HV terminal connectors; Two earthing terminals and strips with necessary nut, bolts and washers; Name and rating plate; Terminal box with LV terminal connections; Mounting nuts, bolts and washers; Any other fittings deemed essential by the Supplier shall also be supplied with

each current transformer. The oil level gauge shall be mounted in such a way that the oil level can be clearly

seen from ground level.

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A dust, vermin and weather proof terminal box shall be provided at the lower end of the current transformer for terminating the secondary windings. The box shall have a bolted cover plate complete with gaskets. The terminal box shall have terminal blocks, cable gland plate and cable glands with shrouds suitable for different sizes of PVC insulated control cables 650/1100V grade as per IEC:227 or IS:1554. The terminal blocks shall have covering of moulded insulation materials complete with brass studs, washers, nuts and lock nuts suitable for termination of 2X2.5 sqmm wires. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends.

The terminal box enclosure shall have protection as per class IP 55 as defined in

IEC:529 or IS:13947. 6.7 CT Junction Box/Console Box Each set of 3 current transformers for three phase shall be provided with a

common junction box mounted on the circuit breaker supporting structure at a convenient position to accommodate the secondary wire of CT and other control cables of Purchaser. Separate terminals for testing the relays and instruments and short circuiting of each current transformer secondary wires shall be provided in it. The junction box enclosure shall have the same protection features as for the terminal box. It shall be provided with terminal blocks, gland plates and glands suitable for different sizes of cables. Facilities shall be provided for earthing the CT secondary wires in the junction box.

6.8 Hollow porcelain insulators The insulators of the current transformers shall conform to latest edition of IS:5621

and shall be subjected to and successfully pass the tests listed in this standard and in IEC:233. The hollow porcelain insulators shall be brown glazed and shall meet the requirements indicated in this specification. The insulators shall be cemented with Portland cement to the flanges resulting in high mechanical, tensile and breaking strength.

6.9 Insulation level The current transformers shall be designed to withstand impulse test voltages and

power frequency test voltages as specified in this specification. 6.10 Terminal connections The CTs shall be provided with bi-metallic solderless clamp and rigid type terminal

connectors on the top tank for connection to the HV terminals. The other requirements shall be same as for the terminal connectors of the circuit breaker described in this specification. They shall be universal type suitable for both horizontal and vertical connections.

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Two earthing terminals complete with necessary hardware shall be provided on each CT for connecting to earth continuity conductor to be provided. The earthing terminals shall be identified by means of appropriate symbol marked in a legible and indelible manner adjacent to the terminals. The terminals shall be adequately sized to meet the full earth fault current envisaged.

6.11 Basic technical requirement Ratings: The CTs shall conform to the following ratings and other particulars of the

circuit breakers:

Technical Requirements

Sl. No

Particulars Requirements

1 Function To control the 33KV feeder (Incoming as well as Outgoing feeders)

2 Requirement Core-1:Instrumentation and Metering Core-2:Combined over current and earth fault protection

3 Transformation Ratio 400-200/1-1 A 4 Rated Burden (VA) Core:1:15 VA

Core:2:PS 5 Class of Accuracy Core- 1:0.5

Core- 2:PS 6 Instrument Security Factor < 10 7 Accuracy Limit Factor Core-2 : PS 8 Rated Voltage/HSV 33/36 KV 9 Short Time Rating 25KA rms for 3 seconds

10 Creepage distance Protected creepage distance

As Per IS

11 Insulation Level: -Impulse Voltage1.2/50s wave withstand level -Power frequency 1 min voltage withstand level

170KV

70KV

6.12 Tests and inspection The CTs shall be tested in accordance with the requirements of the type tests and

routine tests as per the latest issues IEC:185 or IS:2705. The tests to be conducted shall include: 6.12.1 Type Tests: Lightning impulse voltage: Power frequency wet withstand voltage; Temperature rise; Short time current; Composite error;

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Accuracy test (for measuring core); Instrument security current (for measuring core); Current error and phase displacement (for protection core) 6.12.2 Routine tests Verification of terminal marking and polarity; Power frequency dry withstand test on primary windings; Power frequency dry withstand test on secondary windings; Power frequency dry withstand test between sections; Over voltage inter-turn test; Composite error; Turn ratio; Accuracy test (for measuring core); Current error and phase displacement (for protection core); Knee point voltage and magnetizing current test (for PS class); Secondary winding resistance (for PS class). Insulation Resistance Test. 7 POTENTIAL TRANSFORMER 7.1 BASIC TECHNICAL REQIREMENTS The 33KV outdoor voltage transformers are required to meet the following basic

technical requirements (Reference standards: IEC:186, IS:3156 and associated standards listed in the specification):

Sl. No

Particulars Requirements

1 Type Single phase 2 Nominal system voltage, phase to phase 33KV 3 Application Instrumentation, Metering and

Protection 4 Number of secondary windings 1 5 Rated normal burden* 100VA 6 Rated primary voltage 33KV/ 3 7 Rated secondary voltage 110V/ 3 8 Class of accuracy 0.5 9 Rated insulation level: (Primary winding)

(Phase to earth)

i) One minute power frequency withstand 70KV

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voltage to earth (wet and dry) rms ii) Impulse withstand voltage to earth with

1.2/50 sec wave of +ve and –ve polarity (peak)

170KV

10 One minute power frequency withstand voltage of secondary winding (rms)

i) Between phase to earth 3KV ii) Between sections 3KV 11 Rated voltage factor i) Continuous 1.2 ii) For 30 seconds 1.5 12 Creepage distance to earth in mm per KV

of highest phase to phase system voltage 25

* The burden indicated is the minimum acceptable to the Employer. The Contractor shall ensure that the rated output of the voltage transformers are adequate to meet at least 120 percent of the connected load (burden).

7.2 GENERAL The voltage transformers to be supplied under this specification shall be of

outdoor, single phase dead tank double wound, oil immersed type, complying with IEC:185 and IS:3156 suitable for operation in hot and humid atmospheric conditions described in this document. To prevent corrosion of the exposed surfaces, the tank should be not dip galvanized. They shall have separate HV and LV windings and shall be suitable for use as bus VTs in 33/11KV primary substations.

7.3 Duty requirement 33KV Voltage transformer for all the indicating instruments and measuring meters

in the primary substation on 33KV side. 7.4 Porcelain Insulator External parts of the voltage transformers which are under continuous electrical

stress shall be of hollow porcelain insulators complying with latest edition of IS:6521 tested as per IEC:233. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC:815 or IS:13134 and shall be suitable for the worst environmental conditions for heavily polluted atmosphere and shall be not less than 25mm per KV of highest phase to phase system voltage with protected creepage distance minimum 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed.

The insulators shall be cemented with Portland cement to the flanges resulting in

high mechanical, tensile and breaking strength.

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All porcelain used on the voltage transformers shall have the following properties high strength, homogeneity, uniform glaze, free from cavities and other flaws and a high quality uniform finish porcelain components shall withstand the maximum expected static and dynamic loads to which the voltage transformers may be subjected during their service life.

The insulation of the hollow porcelain insulators shall be coordinated with that of

the voltage transformers to ensure that any flash over occurs only externally. 7.5 Core High grade non-ageing cold rolled grain oriented silicone steel of low hysteresis

loss and permeability shall be used for core so as to ensure accuracy at both normal and or over Voltages. The flux density shall be limited to 1.6 Tesla at normal voltage and frequency. There shall be no saturation at any stage during operation.

The instrument security factor of the core shall be low enough so as not to cause

damage to the instruments in the event of maximum short circuit current or over voltages.

7.6 Windings The primary and secondary windings shall be electrolytic copper of high purity

and conductivity and covered with double paper insulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even during maximum over voltages.

The insulation of windings and connections shall be free from composition liable

to soften, ooze, shrink or collapse during service. The current rating of the primary winding shall be one hundred and fifty percent of

the normal rated burden and the windings shall be suitable to withstand continuously the maximum system voltage.

The secondary windings of the voltage transformers shall also be suitable for

continuous over voltage corresponding to the maximum system voltage at the primary winding. The winding supports shall be suitably reinforced to withstand normal handling and the thermal and dynamic stresses during operation without damage.

The voltage transformer secondary circuits will be taken out to form the star point

and earthed at one point outside the voltage transformers. Both primary and secondary winding terminals shall be clearly and indelibly

marked to show polarity in accordance with IEC:186. The connections required for different secondary windings in case of multi-winding voltage transformers shall be clearly indicated in terminal blocks and the wiring diagrams.

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7.7 Tank Both expansion chamber and tank of the voltage transformers shall be made of

high quality steel and shall be hot dip galvanized and shall be able to withstand the stress occurring during transit and all thermal and mechanical stresses resulting from maximum short circuit current during operation.

7.8 Insulating Oil The voltage transformers shall be supplied filled with new insulating oil. The oil

shall conform to the requirements of latest issue of IEC:296 of IS:335. The quantity of insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated in the bid.

7.9 Hermetic Sealing The voltage transformers shall be supplied filled with insulating oil and shall be

hermetically sealed to prevent atmosphere coming in contact with oil, avoiding filtration and change of oil. Nitrogen or other inert gas shall be provided above the oil surface to permit expansion and contraction of oil. Provision shall be made for draining and re-filling the insulating oil.

7.10 Fitting and Accessories Fittings and accessories listed below shall be supplied with each voltage

transformer: Oil level gauge. Oil drain, sampling and filling hole with cap; Pressure relief device; HV terminals; Two earthing terminals with necessary nuts, bolts and washers; Name and rating plate; Secondary terminal box with LV terminal connections; Mounting nuts, bolts and washers; L.V HRC cartridge fuses for the protection of secondary winding; Any other fitting deemed essential by the contractor shall also be supplied along

with each voltage transformer: The oil level gauge shall be mounted in such a way that the oil level can be clearly

seen from the ground level. The name and rating plate shall contain all the particulars as provided in IEC:186

and also the name of the employer and year of manufacture. They shall comply with the clause termed label in this specification.

7.11 SECONDARY TERMINAL BOX A dust, vermin and weather proof terminal box shall be provided at the lower end

of each voltage transformer for terminating the secondary windings. The box shall have a bolted removable cover plate complete with gaskets. The terminal box shall have cable gland plate and cable glands with shrouds suitable for entry of 4 core x2.5mm2 PVC insulated control cables as per IEC:227 or IS:1554.

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For 33KV Voltage Transformer one 4 core 2.5mm2 The terminal box enclosure shall have protection of class IP 55 as defined in

IEC:529 or IS:13947 and shall be painted or galvanized in accordance with specification of Surface Treatment.

7.12 Terminal blocks Terminal blocks of brass studs rated for 10 Amps continuous current, 650 Volt

grade enclosed in moulded insulating materials shall be provided with adequate electrical clearance for terminating the secondary wiring and outgoing connections. The terminal blocks shall be suitable for termination of 2.5mm2 wires. The termination shall be made by crimping Jugs or bare wire with insulating sleeves at ends. All terminals must be marked with numbers and wire termination provided with numbered ferrules for identification.

7.13 Fuse protection The secondary windings shall be protected by HRC cartridge fuses in fuse holder

consisting of carriers and bases. The carriers and bases shall be of high grade flame retarding and non hygroscopic moulded insulating materials with hard glass surface. Each fuse shall be identified with engraved plastic label.

7.14 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of the

terminal box cover. Labels shall be provided inside the cover to describe the functions of various items of equipments.

7.15 TERMINATION The equipment shall be supplied with HV electrical connection terminals of a size

and rating appropriate for all the duties, including overload duty specified for the equipment. The terminals shall be of the bi-metallic type, suitable for connection of all aluminium alloy conductor (AAAC) or aluminium conductor steel reinforced (ACSR). In general connections using palm type solderless sockets shall be preferred. Where the terminals are of the clamp type, they shall be suitable for taking a range of conductors appropriate to the rating of the equipment.

All nuts, bolts, washers and spring washers required to complete the connection

shall be supplied with the equipment. 7.16 EARTHING TERMINAL Two earthing terminals complete with necessary hardware shall be provided on

each voltage transformer for connecting to earth continuity conductors of the Employer. They shall be of electroplated brass and of adequate size to carry the earth fault current.

The earthing terminals shall be identified by means of appropriate symbol marked

in a legible and indelible manner adjacent to the terminals.

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7.17 TEST AND INSPECTIONS The voltage transformers shall be tested in accordance with the requirements of

the type tests and routine tests as provided in the latest issues of IEC:186 or IS:3516.

The tests to be conducted shall include; 7.17.1 Type tests: Lightning impulse voltage test; High voltage power frequency wet withstand voltage; Temperature rise test; Short circuit withstand capability test; Determination of limits of voltage error and phase displacement. 7.17.2 Routine tests: Verification of terminal marking and polarity; Power frequency withstand tests on primary winding; Power frequency dry withstand tests on secondary winding; Power frequency withstand tests between sections; Determination of limits of voltage errors and phase displacement; Partial discharge measurement. Insulating Resistance measurement. 7.18 TEMPERATURE RISE The temperature rise of any part of the voltage transformer under continuous

operating and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in IEC publication 186 or IS:3156. These shall not be exceeded when corrected for the difference between the ambinent temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the bid.

8 PROTECTIVE RELAY & CONTROL PANEL Outdoor control panels with protective relay and meter shall be provided by the

supplier suitable for above breakers. The equipment shall have protection scheme with the following relays:

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(i) Triple pole IDMTL type combined over current (2Nos) & Earth fault (1No), Draw out type, 24V DC Relays having Numerical Communicable relay suitable for both 1A & 5A CT secondary( site selectable) with IEC-60870 protocol and of make as AREVA/Schneider,JVS,ER,Megawin.

Plug setting range of the over current and earth fault relays shall be 5% to 250%. (ii) Master trip relay for inter tripping. (iii) One alarm bell scheme with bell (24V DC). N.B:- Communicable type NUMERCIAL RELAY suitable for both 1A & 5A CT

secondary( site selectable) with IEC-60870 protocol and of make as AREVA/Schneider, JVS, ER, Megawin.

9. METERS: The following meters shall be provided. i) Ammeter:- 0-200-400 A-1No Analogue/ Preferable Make IMP/ AE/DIP/RISHAV

make. ii) Volt meter:- 1 No., 0- 40 KV (size :96mm x 96mm) Analogue/ Preferable Make

IMP/ AE/DIP/RISHAV make iii) Ammeter selector switch- 1 No. Make – Kaycee or any other reputed make. iv) Volt meter selector switch- 1No. Make- Kaycee or any other reputed make. v) 40 watt lamp with switch- 1 No. vi) Plug & Socket- 1 No. vii) Fuses & Links- 1 No. viii) Test terminal Blocks- Test terminal Block need be provided for testing

relays & ammeter. Ix) Space for fixing of energy meter is to be provided on Control panel (energy

meter is in CESU scope) ix) Indication Lamp- Red- Breaker ‘ON’ (24V DC LED type) Green Breaker ‘OFF’ Amber- Breaker ’AUTO TRIP’ Blue- Spring charge indication. White-Healthy Trip illuminated push bottom switch 10. OTHER EQUIPMENTS 10.1 Out Door Control- Relay Panel

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10.1.1 General The electrical controls, relays, instruments, meters, annunciation scheme shall

be provided in a sheet steel enclosure conforming to IEC:298 or IS:3427 mounted on support base on the floor. The panel shall be free standing, dust, moisture and rodent and vermin proof suitable for outdoor installation. The panel shall have a high degree of protection for outdoor installation with relevant standard.

Each panel shall comprise of rigid welded structure frame enclosed completely

by metal sheet of thickness not less than 2mm. The sheets shall be cold rolled with smooth finish leveled and free from flaws. The structural frame and all load bearing members of the enclosure shall have minimum thickness of 2.5mm.

The enclosure shall have hinged door at the front and back for access to the

low voltage wiring. All door panels and removable covers shall be gasketed all round with neoprene bonded gasket. Ventilating louvers shall be provided to limit the temperature rise as provided in IEC:694 and 298 or IS:12729 and 3427. They shall be provided with filters encased in fine wire screens for non-ferrous metal or stainless steel unaffected by moisture and rain water. A 230V AC heater with auto temperature control shall be provided in the cabinet to prevent moisture condensation.

The housing shall be surface treated and painted in accordance with the clause

on Surface Treatment of this specification. 10.1.2 Panel wiring and accessories. 10.1.3 Wiring Each panel shall be supplied with all internal wiring complete. Panel wiring shall be suitably bunched and clamped for neat appearance. The

conductors used for wiring puspose shall be PVE insulated 650/1100 volt grade semi-flexible heat resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC:227, 502 or IS:1554. The wiring shall be securely supported and taken though PVC through PVC troughs. Each wire shall be continuous from end to end without any joint in between. All panel wiring shall be capable of withstanding a voltage of 2KV AC 50Hz for one minute.

Cable and wire for connections within the switchgear and between the

switchgear and terminal blocks shall have a minimum temperature rating of 90 degree Celsius. The size of the conductors for panel wiring shall be not less than 2.5mm2. For CT secondary wiring, two such wires shall be used in parallel.

10.1.4 Panel wiring protection The panels shall be equipped with links and HRC cartridge fuses conforming to

IEC:269 or IS:13703 in 650 Volt grade phenolic moulded fuse holder consisting of fuse carrier and base or miniature circuit breakers conforming to IEC:947-2 or IS:13947-2 at appropriate locations. The carriers and bases shall be made of high grade flame retardant and non hygroscopic phenolic moulded material with hard glass surface. Each fuse or MCB shall be identified with engraved plastic label.

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In general, fuses and MCBs shall be limited to the minimum required for safety.

The protection scheme shall include fuses for VT secondary circuits and DC supply to each panel and fuses for MCB for spring charging motor and incoming AC supply.

10.1.5 Terminal blocks Terminal blocks of brass studs rated for 10 amps continuous current, 650 volt

DC grade covered by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare conductor with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with numbered ferrules for identification. All numbering and marking including those in wiring diagram shall follow the guidelines provided in IS:11353. All circuit breaker auxiliary contracts including spare contacts shall be wired to the terminal blocks. Ten percent spare terminals shall be provided.

10.1.6 Colour and numbering The wiring used for 230V AC supply for illumination lamp, panel heater and

other devices shall be coloured red for phase wire and black for the neutral. The colour of wires connecting directly to Earth shall be black. All other panel wires shall be of one colour to be approved.

Engraved core identification plastic ferrules marked to correspond with the

panel wiring diagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire and shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and 9, if used shall be under scored to enable differentiation.

10.1.7 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of

the door of the switchgear compartment. Labels shall be provided inside the compartment to describe the functions of the various items of equipment.

The scope of the supply shall include the panel mounting base plate and all

special equipment, bolts, nuts and washers necessary for making the supporting.

10.2 Supporting Structure The supply of the material shall be complete with mounting structures of mild

steel sections conforming to IS:226 or equivalent ISO. The supporting structure shall be designed and constructed to withstand the maximum combined effects of the circuit breaker dead weight, its maximum dynamic load and maximum effect of wind loading. The supporting structure shall be hot dip galvanized as per clause on surface treatment of this specification.

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10.3 CT and PT mounting bracket The supporting structure shall be fitted with a bracket for supporting the three oil

filled 33KV single phase current transformers and 3 nos. 33KV(1 Phase)PTs. The support bracket shall be provided opposite the circuit breaker poles and shall ensure adequate clearance between the breaker poles and the CTs as well as between the CTs and PTs. The CTs & PTs shall be supplied by the Supplier as per specification above and is included in the scope. The drawings of the structure with bracket shall be subject to Purchaser’s approval before fabrication.

The CT and PT mounting bracket shall be hot dip galvanized as per clause on

surface treatment of this specification. 10.4 Local control cabinet The operating mechanism, local controls and monitoring shall be provided in a

metal clad control cabinet fitted to the same structure supporting the breaker and mounted at a convenient height for safe operation from ground level or from platform to be supplied under the contract.

The cabinet shall be made of minimum 2.00mm sheet steel and shall be

constructed as a dust, weather and vermin proof outdoor housing with protection of IP-54 class as defined in IEC:529 or IS:13947. It shall have single door and transparent windows for reading the circuit breaker ON or OFF position and spring charge position without opening the door. The door and any removable covers shall be gasketed all round with neoprene bonded gaskets. A ventilating louver shall be provided with fine wire non-ferrous metal or stainless steel screen and filter. A 230V AC heather with auto temperature control shall be provided in the cabinet to prevent moisture condensation and also a 230 volt lamp for internal illumination with door operated switch.

The local control cabinet shall be subjected to surface treatment and painting as

per clause on surface treatment of this specification. 10.5 Panel wiring and accessories Panel wiring shall be suitably bunched and clamped for neat appearance. The

conductor used for wiring purpose shall be PVC insulated 650 volt/ 1100V grade semi-flexible copper cable conforming to IEC:227 or IS:1554, heat resistant, flame, vermin and rodent proof. The wiring shall be securely supported and taken through PVC troughs. All panel wiring shall be capable of withstanding a voltage of 2KV AC 50Hz for 1 minute. Each wire shall be continuous from end to end without any joint in between.

The sizes of the control cable for wiring in the cabinet shall be not less than

2.5mm2. CT secondary wiring shall be though two such wires in parallel.

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10.5.1 Fuse protection The cabinet shall be equipped with links and HRC cartridge fuses in 650 volt

grade fuse holders consisting of fuse carrier and base. The holders shall be made of high grade, flame retardant and non hygroscopic phenolic moulded material of dark brown colour with hard glass surface. Each fuse shall be identified with engragved plastic labels.

10.5.2 Terminal blocks Terminal blocks rated for 10 amps continuous current, 650 volt grade covered

by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with numbered ferrule for identification. All numbering and marking include those in wiring diagram shall follow the guidelines provided in IS:11353. Ten percent spare terminals shall be provided.

10.5.3 Colours The wiring used for AC supply for illumination lamp and heater shall be

differently coloured from control wiring so that these can be distinguished from each other. The colour of all earth wire shall be black.

10.6 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of

the control cabinet. Labels shall be provided inside the cabinet to describe the functions of the various items of equipment.

10.7 Cable Entry A removable gland plate shall be provided at the bottom of the cabinet for entry

of Purchaser’s control and auxiliary power cables in the cabinet. Required number of electroplated brass cable glands of appropriate sizes with shrouds shall be provided in consultation with the Purchaser in the gland plate for the control and power cables. Provision shall be make for earthing of the cable armours in the gland.

11 OPERATING MECHANISM 11.1 General The operating mechanism of the circuit breaker shall be magnetic actuator /

motor wound spring charged type. It shall be electrically and mechanically trip free with anti pumping device (as per IEC:694 definition). All working parts in the mechanism shall be of corrosion resistant material. Self lubricating, wearing resistant bearings shall be provided in the mechanism.

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The mechanism shall fully close the circuit breaker and sustain it in the closed position against the forces of the rated making current and shall fully open the circuit breaker without undue contact bounce at a speed commensurate with that shown by tests to be necessary to achieve the rated breaking capacity in accordance with IEC:56 or IS:13118. The mechanism shall be capable of being locked in either the open or closed position. The mechanism shall be capable of fully closing and opening again after the auto-reclose time interval specified as 0.3 second in this specification.

11.2 Spring mechanism The spring operating mechanism shall be with spring charging motor, opening

and closing springs with limit switches and all accessories necessary for automatic charging. In normal operation, recharging of the operating springs shall commence immediately and automatically upon completion of the closing operation so that a complete sequence of closing and opening operation should be possible.

It shall be possible to hand charge the operating spring with the circuit breaker

in either the open or closed position conveniently from the ground level. Closure whilst a spring charging operation is in progress shall be prevented and release of the springs shall not be possible until they are fully charged.

The state of charge of the operating springs shall be indicated by a mechanical

device showing ‘SPRING CHARGED’ when closing spring is fully charged and operation is permissible and ‘SPRING FREE’ when closing spring is not fully charged and the operation is not possible. Provision shall be made for remote electrical indication of ‘Spring Charged’ and ‘Spring Free’ conditions.

The operating mechanism shall be such that the failure of any auxiliary spring

shall not cause tripping or closing the circuit breaker but shall not prevent tripping against trip command.

Closing action of the circuit breaker shall charge the opening spring ready for

tripping. From the close position with spring charged, one open-close-open operation shall be possible without recharging the spring.

11.3 Motor The motor for spring charging shall be single phase 230 Volt A. C motor.

Continuous motor rating shall be at least ten percent above the maximum load demand of the driven equipment. It shall remain within its rated capacity at all operating points that will arise in service. It shall be protected by H.R.C cartridge fuses or MCB. The motor shall comply with IEC:34 or IS:996.

12. AUXILIARY POWER SUPPLY The operating mechanism shall be suitable to operate with the following

auxiliary power supplies. a) 230V,50Hz Single phase

A.C- For spring charging motor

b) DC supply 24 Volts- For close and open coils, indication & Alarm

(Power pack input supply:230V & 110V AC and Output:24V DC) with Battery Back up.

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The DC supply shall be from a Power Pack. The Input to Power Pack is 110V

from PT and 230V from main supply. The power pack should be capable for minimum 3 Tripping even if input to power pack is failed.

The mechanism shall be designed to operate satisfactorily despite fluctuations

of auxiliary power supplies as under: AC supply: Voltage From 115% to 85% of normal voltage Frequency From 105% to 95% of normal frequency Combined voltage

and frequency variation

From 115% to 85% of normal

DC supply: Voltage From 120% to 70% of normal voltage 13. INTERLOCKS The circuit breaker shall be capable of being mechanically and electrically

interlocked with the associated line isolator so that the isolator cannot be operated with the breaker in the closed position.

All doors or shutters which give access to live parts shall be interlocked in such

a way that these cannot be opened unless the circuit breaker is in the open position.

Other interlocks shall be provided as deemed necessary for safety. 14. PROTECTION AND METERING The circuit breaker shall be particularly suitable for the following protection

schemes: Inter-tripping for simultaneous tripping other circuit breaker. 15. TERMINAL CONNECTOR Suitable terminal connectors of bi-metallic type suitable for both horizontal and

vertical connection shall be provided on the terminal pad both on the incoming and the outgoing side for connection of jumpers of ACSR or AAAC conductor. The size of the conductor may vary between 100mm2 and 232mm2 depending upon the location of the circuit breaker. The terminal connection drawing and details are to be approved by the Purchaser before fabrication. The terminal connectors shall be bi-metallic type to avoid bi-metallic corrosion.

16. INSULATION AND CLEARANCE a) The insulation to ground, the insulation between open contacts and insulation

between phases of the circuit breaker shall be capable of satisfactorily withstanding dielectric test voltages.

b) The minimum clearance in open air shall be as follows:

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Between poles - As Per IS Phase to earth - As Per IS Ground clearance for live

part - As Per IS

17. TEMPERATURE RISE The temperature rise and the maximum temperature of any part of the circuit

breaker under continuous load condition and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in Table V of IEC publication 694 or table 4 of IS:12729. These limits shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the tender.

18. TESTS 18.1 Type and routine tests The circuit breakers shall be subjected to routine and type tests in accordance

with the standards listed in this specification including the following IEC and IS standards with the latest amendments: First the bidder shall manufacture One Proto type Model of ordered VCB as per approved drawing and GTP, match to the Type Test report and drawing as submitted earlier in the bid and as per following standards for successful Inspection and Testing during routine test before clearance for mass production.

Circuit breaker IEC:56 and IS:13118 and relevant other

standards Porcelain insulator IEC:233 and IS:5621 and relevant other

standards The tests shall include but not limited to the following: 18.2 Short circuit tests The circuit breaker shall satisfactorily perform the out of phase and short circuit

duties specified in IEC:56, IEC:17A(Sectt.) and IEC:17A/CD/474, IS-13118 and IS:13516.

The circuit breaker shall be capable of performing at least twenty five (25) open

operations at the rated short circuit current before maintenance or inspection is required.

18.3 Capacitive current switching Capacitive switching tests shall be performed in accordance with IEC:56 or

IS:13118 and IEC:17A/CD/474 at 1.3U preferably by direct test method or alternatively using synthetic method to IEC:427 or IS:13516. The test circuits shall simulate the most onerous site conditions.

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18.4 Reactor Switching In addition to the capacitive current switching tests to IEC:56 or IS:13118 and

IEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching in accordance with IEC:1233, Examination of the interrupter after the tests shall not show any evidence of surface tracking or erosion of contracts.

18.5 Dielectric tests At zero gauge loss of vacuum inside the interrupter chamber, the open

contracts shall withstand continuously, the rated phase to ground voltage and it shall be possible to break normal current in these conditions. During the dielectric type tests, no flashover external or internal shall be acceptable.

The circuit breakers shall be subjected to a power frequency AC voltage test for

one minute in dry and wet conditions and there shall be no external flash over to earth.

18.6 Mechanical endurance In addition to the requirements of IEC:56, an extended mechanical endurance

test is required to show that the circuit breaker is capable of at least 10,000 operations at no load in accordance with IEC:17A/474/CD. Between the specified test series in IEC:17A/474/CD, some maintenance such as lubrication and mechanical adjustment is allowed and shall be performed in accordance with manufacturer’s instructions. Change of contracts is not permitted.

18.7 Low current switching The circuit breakers shall produce very low over voltage (<2.0 pu) on all

switching circuits inductive current including reactor switching to IEC-1233 and capacitive current switching to IEC:17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breaker shall be re-ignition or re-strike free for all duties.

18.8 Duty requirement tests Apart from auto-reclosing and the other duties mentioned above, the breakers

shall be able to perform the following duties for which type tests are to be conducted as per IEC:56 or IS:13118.

1. Breaking the steady and the transient magnetising current of the transformer. 2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS. 3. Cable charging breaking current. 4. Back-to-back capacitor bank breaking current. 5. Single capacitor bank breaking current. 6. Capacitor bank in rush making current. Test for the resistance of the main circuit shall also be conducted. 18.9 Temperature rise test Temperature rise test is to be conducted on the circuit breaker and the

accessories in accordance with IEC:56 or IS:13118. The temperature rise shall be limited as per this specification.

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19. PERFORMANCE REQUIREMENTS The supplier shall declare the circuit breaker opening and closing times at 120

percent, 100 percent and 70 per cent of the rated voltage of the opening and closing devices when measured at the terminals of the trip and closing coils. The minimum make break time at rated voltage and total break time of the CB shall be stated. The total break time must not exceed 60m. sec.

20. EARTHING All metal parts not intended for carrying current or not alive shall be connected

to duplicate earthing system and suitable electroplated brass earthing terminals shall be provided on each circuit breaker in conformity with IEC:56 or IS:13118. Suitable identification mark for the earth terminals shall be provided adjacent to the terminal.

Earth continuity conductors shall be provided down to the ground level for earth

connection to purchaser’s earthing grid. It shall have sufficient cross sectional area to afford a low resistance path for the full fault current envisaged. Such conductor shall also be provided for the CTs up to the ground level.

The size of the earth continuity conductor shall be large enough to reduce the

potential rise of the metal frame of the breaker in the even of fault to minimum but in any case not more than 10V. The size of the conductor shall also be adequate to restrict the temperature rise without causing any damage to the earth connection in the case of fault. No riveted joints in the earth conducting path shall be permissible and only bolted joints of adequate size shall be provided with nuts, bolts and plain and spring washers. The surfaces to be jointed shall be perfectly flat without any unevenness to ensure that there is no contact resistance.

An earth busbar of copper strip shall be provided inside the local control cabinet

to which all earthing connections must be made. The earth busbar shall be terminated into two electroplated brass earthing terminals of adequate size with nuts, bolts and washers for connecting to earth continuity conductor mentioned above.

21.0 Mandatory Spare Parts for full Tendered quantity of 33KV Outdoor VCB. The supplier should provide the mandatory spares as follows , free of

cost without any extra price for these spares parts. l. No. Description Requirement (Nos)

1 Vacuum Interrupter 5 2 Bottom Porcelain Housing 10 3 Top Porcelain Housing 3 4 Tripping Coil 10 5 Closing Coil 10 6 IDMTL 2O/C+1E/F Relay 5 7 Spring Charge Motor 5 8 Ammeter 5 9 Voltmeter 5 10 TNC 5

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SECTION- IV B

TECHNICAL SPECIFICATION FOR

11KV OUTDOOR VACCUM CIRCUIT BREAKERS FOR FEEDER PROTECTION

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SECTION- IV (B)

TECHNICAL SPECIFICATION FOR 11KV OUTDOOR VACUUM CIRCUIT BREAKER FOR FEEDER PROTECTION

1. SCOPE 1.1 This specification covers design, engineering, manufacture, testing, inspection

before dispatch, packing, forwarding, transportation, insurance during transit, delivery to site/ stores of 11KV outdoor Vacuum circuit Breaker including CT, PT, CRP & GI structure for use in the 33/11KV primary substations under the distribution networks of CESU.

1.2 All vacuum circuit breakers must be manufactured by ISO 9000 certified

Organization and shall have been type tested at International reputed laboratory/ CPRI/NABL approved laboratory within five years as on the date of bid opening.

1.3 The scope of supply includes the provision of type tests wherever required. Rates

for type tests shall be given in the appropriate price schedule of the bid document and will be considered for evaluation. The purchaser reserves the right to waive type tests.

1.4 The scope also includes the circuit breaker and current and potential transformers,

supporting structures, operating mechanism, local/ remote control cabinet, relay control panel, foundation bolts, all the accessories and auxiliary equipment mandatory spares and special tools for satisfactory installation and operation.

1.5 The circuit breakers shall conform in all respects to the highest standards of

engineering, design, workmanship, this specification and the latest revisions of relevant standards at the time of offer and the purchaser shall have the power to reject any work or materials, which, in his judgment, is not in full accordance therewith.

2. STANDARDS Expect where modified by this specification, the circuit breakers and the

accessories shall be designed, manufactured and tested in accordance with latest editions of the following standards as specified in Clause No-2, Technical Specifications for 33KV outdoor vacuum circuit breakers, section-IV(A).

3. REQUIREMENTS The circuit breakers to be supplied against this specification shall be required to

control the outgoing 11 KV feeders in 33/11KV sub-stations. The circuit breakers shall be suitable for 3 phase 50Hz solidly grounded neutral system and shall have normal current carrying capacity and symmetrical short circuit current breaking capability as mentioned hereunder.

The required 11KV Vacuum Circuit Breaker suitable for outdoor installations are to

be quoted by Manufacturers only with a valid ISO 900 certification. 3.1 BASIC TECHNICAL REQUIREMENTS: The vacuum circuit breakers are required to meet the following basic technical

requirements. (Reference standards IEC:56, IS:13118 and associated standards listed in this specification.

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Basic Technical Requirements

Sl. No

Particulars Requirements

1 Service type Outdoor 2 No. of Poles 3 3 Nominal system voltage 11KV 4 Highest system voltage 12KV 5 Rated normal current at 500C i) For Bus-bar of Circuit Breaker 1250A ii) For Interrupter 2000A 6 Rated short circuit breaking current (rms) 25KA 7 Rated short circuit making current (peak) 62.5KA 8 Rated short time current withstand capability for 3 sec. 25KA (Interrupter) 9. Rated insulation level: i) One minute power frequency withstand voltage to earth

(wet and dry) rms 28KV

ii) Impulse withstand voltage to earth with 1.2/50sec, wave of +ve and –ve polarity (Peak)

70KV

10 First – pole – to clear factor 1.5 11 Rated operating sequence (for auto reclosing) O-0.3 Sec- CO-3 min-

CO 12 Maximum break time 3 cycles 13 Rated out of phase breaking current 25% of the

symmetrical short circuit breaking current

14 Maximum pole scatter 10 milli seconds 15 Rated Auxiliary supply for spring charge motor, lamp &

heater circuit. 230V A.C

16 Rated supply voltage for trip/close coil 24V D.C 17 Minimum creepage distance (mm) As Per IS 18 Minimum protected creepage distance (mm) As Per IS

4. SERVICE CONDITIONS: The breakers are to be suitable for operation under the service conditions as

specified in Clause No.4, Technical Specifications for 33KV outdoor vacuum circuit Breakers, Section-IV(A).

5.1 General The circuit breakers shall be structure mounted open type with vacuum as

interrupting media incorporating separate interrupters of 2000 A rating for each phase mounted on single frame. There shall be a common drive mechanism actuating the interrupters, which must work in synchronism. These breakers shall be provided with suitable local control while provision shall be made for remote control.

The circuit breakers shall be fitted with spring mechanism. The inherent design of

these circuit breakers shall be such that they shall satisfactorily perform all test duties and interrupt out-of-phase current and produce very low over voltage (<2.0p.u.) on all switching circuits, capacitive and inductive to IEC:56, IS:13118 and other associated standards mentioned in the clause of this specification.

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The terminal pads shall have Bimetallic / alluminium alloy cast. The design of the circuit breakers shall be such that inspection and replacement of contracts, coils, vacuum bottles and any worn or damaged components can be carried out quickly and this ease. The contract gaps shall be adjustable to allow for wear.

The mechanism and the connected interrupters shall satisfy the mechanical

endurance requirements of IEC:56, IS:13118 and all additional requirements specified herein.

5.2 Porcelain Insulator External parts of the circuit breakers, which are under continuous electrical stress,

shall be of hollow porcelain. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC:815 or IS: 13134 and shall be suitable for the worst environmental conditions specified in this specification. The creepage distance across the interrupting chambers shall suite the outdoor service conditions mentioned in the relevant standards for heavily polluted atmosphere and shall be not less than 900 mm with protected creepage distance 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed. The insulators shall comply with IS:5621 and tested in accordance with IEC:233.

All porcelain whether, used on the interrupting chamber or on the support insulator

shall have the following properties: Higher strength, homogeneity, uniform glaze, free from cavities and other flaws

and high quality uniform finish porcelain components and shall withstand the maximum expected static and dynamic loads to which the circuit breakers may be subjected during their service life.

5.3 Interrupting media 5.3.1 Vacuum: In vacuum circuit breakers, facilities shall be provided for monitoring the contract

erosion and any change in contact gap. The vacuum bottles shall be easily replaceable on site and the mechanism shall be conveniently adjustable to permit resetting the contact gap.

The vacuum circuit breaker poles shall be sealed to prevent contamination of the

spaces surrounding the interrupters. The Bidder shall demonstrate how this is achieved by supplying technical details with the bid.

5.4 Auxiliary contracts 12 auxiliary contacts (6N.O.+6N.C.) of 24 Volt D.C grade and 10 amps DC rating

shall be provided in each circuit breaker.

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5.5 Indication A mechanically operated circuit breaker position indicator of non corroding

material shall be provided in a location visible from the operating side of the breaker without the necessity to open the mechanism door. The word ‘OFF’ in white letter on green background shall be used to indicate that the breaker is in the opening position and the word ‘ON’ in white letters on a red background to indicate that the breaker is in the closed position. The drive for the device shall be positive in both directions and provision shall be made for local and remote electrical indication.

Indication of spring charging condition shall be provided as mentioned in this

specification. Mechanical counters to record the number of closing operations shall be provided for each circuit breaker mechanism.

5.7 Operation and controls The breaker shall normally be operated by remote electrical control with electrical

tripping by shunt trip coil. Provision shall be made for local electrical operation and mechanical operation.

The following facilities shall be provided in the circuit breaker local control cabinet: LOCAL/ REMOTE selector switch of stay put type. The selection of ‘local’

operation shall inhibit the operation of the breaker from any remote source. ON/NEUTRAL/ OFF control switch or ON and OFF push buttons. The push

buttons shall be momentary contract type with rear terminal connections. The close push button shall be of green colour and the open push button red colour.

MECHANICAL EMERGENCY TRIP DEVICE: suitable for manual operation

in the event of failure of electrical supplies. The device shall be accessible without opening any access doors and distinctly labeled. It shall be shrouded and protected against inadvertent operation.

Means shall be provided for manual operation of these circuit breakers

during failure of auxiliary power in addition to electrical operation. Means shall be provided to prevent the mechanism from responding to a

close signal when the trip coil is energized or to reclosing from a sustained close signal either opening due to a trip signal or failure to hold in the closed position.

The circuit breaker shall be able to perform 10,000 operating cycles at no load in

accordance with IEC:17A/474/CD for circuit breakers for auto reclosing duties.

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6. CURRENT TRANSFORMERS Current transformers, three per circuit breaker, shall be of outdoor, single phase

oil immersed dead tank type and shall comply with IEC:185 and IS:2705, suitable for operation in hot and humid atmospheric conditions described in service condition. They shall be mounted on the bracket. The CT tank should be Hot Dip galvanized as per relevant ISS to prevent corrosion of all exposed metal parts.

6.1 Core High grade non- ageing cold rolled grain oriented (CRGO M4 or better grade)

silicon steel of low hysteresis loss and permeability shall be used for the core so as to ensure specified accuracy at both normal and over currents. The flux density shall be limited to ensure that there is no saturation during normal service.

The instrument security factor of the core shall be low enough so as not to cause

damage to the instruments in the event of maximum short circuit current. 6.2 Windings The secondary windings shall be made of electrolytic copper with suitable

insulation. The conductor shall be of adequate cross- section so as to limit the temperature rise even during short circuit conditions. The insulation of windings and connections shall be free from composition liable to soften, coze, shrink or collapse during service.

Polarity shall be indelibly marked on each current transformer and at the lead and

termination at associated terminal blocks. CTs with multi ratio winding shall be clearly tabulated to show the connections required for different ratios. Similar numbers shall be marked on terminal block arrangement and wiring diagram. Apart from the above marking and those to be provided as per IEC 185 or IS 2705, other markings shall be provided in consultation with owner.

The continuous current rating of the primary winding shall be one hundred and fifty

percent of the normal rated current. Secondary windings of current transformers shall be used for metering, instrumentation and protection and shall be rated for continuous current of one hundred and fifty percent of normal rated current of primary winding.

6.3 Construction The current transformer enclosures shall be made of high quality steel and shall

be hot dip galvanized and shall be able to withstand and stresses occurring during transportation and the terminal and mechanical stresses resulting from maximum short circuit current in service. The primary winding and terminals shall be in a tank and supported by a hollow porcelain insulator. The secondary connection shall be conduited through the hollow insulator and terminated in a terminal box mounted on the base plate.

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6.4 Hermetic sealing Each current transformer shall be supplied filled with insulating oil complying with

IEC:296 or IS:335 and shall be hermetically sealed to prevent atmosphere coming in contact with oil, avoiding frequent filtration and change of oil. Nitrogen or any oil inert gas above the oil level shall be provided to permit expansion and contraction of oil without any contract with the atmosphere.

The current transformers shall have provision for draining and re-filling insulation

oil after drying. 6.5 Insulating oil The current transformer shall be complete with new insulating oil. The quantity of

insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated in the bid. The oil shall conform to the requirements of latest issue of IEC:296 or IS:335.

6.6 Fittings and accessories Fittings and accessories listed below shall be supplied with each current

transformer: Oil level gauge; Oil filling hole and cap; Pressure relief device; HV terminal connectors; Two earthing terminals and strips with necessary nut, bolts and washers; Name and rating plate; Terminal box with LV terminal connections; Mounting nuts, bolts and washers; Any other fittings deemed essential by the Supplier shall also be supplied with

each current transformer. The oil level gauge shall be mounted in such a way that the oil level can be clearly

seen from ground level. A dust, vermin and weather proof terminal box shall be provided at the lower end

of the current transformer for terminating the secondary windings. The box shall have a bolted cover plate complete with gaskets. The terminal box shall have terminal blocks, cable gland plate and cable glands with shrouds suitable for different sizes of PVC insulated control cables 650/1100V grade as per IEC:227 or IS:1554. The terminal blocks shall have covering of moulded insulation materials complete with brass studs, washers, nuts and lock nuts suitable for termination of 2X2.5 sqmm wires. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends.

The terminal box enclosure shall have protection as per class IP 55 as defined in

IEC:529 or IS:13947.

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6.7 CT Junction Box/Console Box Each set of 3 current transformers for three phase shall be provided with a

common junction box mounted on the circuit breaker supporting structure at a convenient position to accommodate the secondary wire of CT and other control cables of Purchaser. Separate terminals for testing the relays and instruments and short circuiting of each current transformer secondary wires shall be provided in it. The junction box enclosure shall have the same protection features as for the terminal box. It shall be provided with terminal blocks, gland plates and glands suitable for different sizes of cables. Facilities shall be provided for earthing the CT secondary wires in the junction box.

6.8 Hollow porcelain insulators The insulators of the current transformers shall conform to latest edition of IS:5621

and shall be subjected to and successfully pass the tests listed in this standard and in IEC:233. The hollow porcelain insulators shall be brown glazed and shall meet the requirements indicated in this specification. The insulators shall be cemented with Portland cement to the flanges resulting in high mechanical, tensile and breaking strength.

6.9 Insulation level The current transformers shall be designed to withstand impulse test voltages and

power frequency test voltages as specified in this specification. 6.10 Terminal connections The CTs shall be provided with bi-metallic solderless clamp and rigid type terminal

connectors on the top tank for connection to the HV terminals. The other requirements shall be same as for the terminal connectors of the circuit breaker described in this specification. They shall be universal type suitable for both horizontal and vertical connections.

Two earthing terminals complete with necessary hardware shall be provided on

each CT for connecting to earth continuity conductor to be provided. The earthing terminals shall be identified by means of appropriate symbol marked in a legible and indelible manner adjacent to the terminals. The terminals shall be adequately sized to meet the full earth fault current envisaged.

6.11 Basic technical requirement Ratings: The CTs shall conform to the following ratings and other particulars of the

circuit breakers:

Technical Requirements Sl. No

Particulars Requirements

1 Function To control the 11KV Transformer protection 2 Requirement Core-1:Instrumentation and Metering

Core-2:Combined over current and earth fault protection 3 Transformation Ratio 400-200/1-1 A 4 Rated Burden (VA) Core:1:15 VA

Core:2: PS 5 Class of Accuracy Core- 1:0.5

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Core- 2: PS 6 Instrument Security Factor < 10 7 Accuracy Limit Factor Core-2 : PS 8 Rated Voltage/HSV 11/12 KV 9 Short Time Rating 25KA rms for 3 seconds

10 Creepage distance Protected creepage distance

As Per IS

11 Insulation Level: -Impulse Voltage1.2/50s wave withstand level -Power frequency 1 min voltage withstand level

70KV

28KV

6.12

Tests and inspection

The CTs shall be tested in accordance with the requirements of the type tests and

routine tests as per the latest issues IEC:185 or IS:2705. The tests to be conducted shall include: 6.12.1 Type Tests: Lightning impulse voltage: Power frequency wet withstand voltage; Temperature rise; Short time current; Composite error; Accuracy test (for measuring core); Instrument security current (for measuring core); Current error and phase displacement (for protection core) 6.12.2 Routine tests Verification of terminal marking and polarity; Power frequency dry withstand test on primary windings; Power frequency dry withstand test on secondary windings; Power frequency dry withstand test between sections; Over voltage inter-turn test; Composite error; Turn ratio;

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Accuracy test (for measuring core); Current error and phase displacement (for protection core); Knee point voltage and magnetizing current test (for PS class); Secondary winding resistance (for PS class). Insulation Resistance Test. 7 POTENTIAL TRANSFORMER 7.1 BASIC TECHNICAL REQIREMENTS The 11KV outdoor voltage transformers are required to meet the following basic

technical requirements (Reference standards: IEC:186, IS:3156 and associated standards listed in the specification):

Sl. No

Particulars Requirements

1 Type Single phase 2 Nominal system voltage, phase to phase 11KV 3 Application Instrumentation, Metering and

Protection 4 Number of secondary windings 1 5 Rated normal burden* 100VA 6 Rated primary voltage 11KV/ 3 7 Rated secondary voltage 110V/ 3 8 Class of accuracy 0.5 9 Rated insulation level: (Primary winding)

(Phase to earth)

i) One minute power frequency withstand voltage to earth (wet and dry) rms

28KV

ii) Impulse withstand voltage to earth with 1.2/50 sec wave of +ve and –ve polarity (peak)

70KV

10 One minute power frequency withstand voltage of secondary winding (rms)

i) Between phase to earth 3KV ii) Between sections 3KV 11 Rated voltage factor i) Continuous 1.2 ii) For 30 seconds 1.5 12 Creepage distance to earth in mm per KV

of highest phase to phase system voltage 25

* The burden indicated is the minimum acceptable to the Employer. The Contractor shall ensure that the rated output of the voltage transformers are adequate to meet at least 120 percent of the connected load (burden).

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7.2 GENERAL The voltage transformers to be supplied under this specification shall be of

outdoor, single phase dead tank double wound, oil immersed type, complying with IEC:185 and IS:3156 suitable for operation in hot and humid atmospheric conditions described in this document. To prevent corrosion of the exposed surfaces, the tank should be not dip galvanized. They shall have separate HV and LV windings and shall be suitable for use as bus VTs in 33/11KV primary substations.

7.3 Duty requirement 11KV Voltage transformer for all the indicating instruments and measuring meters

in the primary substation on 11KV side. 7.4 Porcelain Insulator External parts of the voltage transformers which are under continuous electrical

stress shall be of hollow porcelain insulators complying with latest edition of IS:6521 tested as per IEC:233. The creepage and flashover distance of the insulators shall be dimensioned and the type and profile designed in accordance with IEC:815 or IS:13134 and shall be suitable for the worst environmental conditions for heavily polluted atmosphere and shall be not less than 25mm per KV of highest phase to phase system voltage with protected creepage distance minimum 50 percent of the total. Internal surfaces of hollow insulators shall also be glazed.

The insulators shall be cemented with Portland cement to the flanges resulting in

high mechanical, tensile and breaking strength. All porcelain used on the voltage transformers shall have the following properties

high strength, homogeneity, uniform glaze, free from cavities and other flaws and a high quality uniform finish porcelain components shall withstand the maximum expected static and dynamic loads to which the voltage transformers may be subjected during their service life.

The insulation of the hollow porcelain insulators shall be coordinated with that of

the voltage transformers to ensure that any flash over occurs only externally. 7.5 Core High grade non-ageing cold rolled grain oriented silicone steel of low hysteresis

loss and permeability shall be used for core so as to ensure accuracy at both normal and or over Voltages. The flux density shall be limited to 1.6 Tesla at normal voltage and frequency. There shall be no saturation at any stage during operation.

The instrument security factor of the core shall be low enough so as not to cause

damage to the instruments in the event of maximum short circuit current or over voltages.

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7.6 Windings The primary and secondary windings shall be electrolytic copper of high purity

and conductivity and covered with double paper insulation. The conductor shall be of adequate cross-section so as to limit the temperature rise even during maximum over voltages.

The insulation of windings and connections shall be free from composition liable

to soften, ooze, shrink or collapse during service. The current rating of the primary winding shall be one hundred and fifty percent of

the normal rated burden and the windings shall be suitable to withstand continuously the maximum system voltage.

The secondary windings of the voltage transformers shall also be suitable for

continuous over voltage corresponding to the maximum system voltage at the primary winding. The winding supports shall be suitably reinforced to withstand normal handling and the thermal and dynamic stresses during operation without damage.

The voltage transformer secondary circuits will be taken out to form the star point

and earthed at one point outside the voltage transformers. Both primary and secondary winding terminals shall be clearly and indelibly

marked to show polarity in accordance with IEC:186. The connections required for different secondary windings in case of multi-winding voltage transformers shall be clearly indicated in terminal blocks and the wiring diagrams.

7.7 Tank Both expansion chamber and tank of the voltage transformers shall be made of

high quality steel and shall be hot dip galvanized and shall be able to withstand the stress occurring during transit and all thermal and mechanical stresses resulting from maximum short circuit current during operation.

7.8 Insulating Oil The voltage transformers shall be supplied filled with new insulating oil. The oil

shall conform to the requirements of latest issue of IEC:296 of IS:335. The quantity of insulating oil for first filling of the equipment and complete specification of oil proposed to be used shall be stated in the bid.

7.9 Hermetic Sealing The voltage transformers shall be supplied filled with insulating oil and shall be

hermetically sealed to prevent atmosphere coming in contact with oil, avoiding filtration and change of oil. Nitrogen or other inert gas shall be provided above the oil surface to permit expansion and contraction of oil. Provision shall be made for draining and re-filling the insulating oil.

7.10 Fitting and Accessories Fittings and accessories listed below shall be supplied with each voltage

transformer:

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Oil level gauge. Oil drain, sampling and filling hole with cap; Pressure relief device; HV terminals; Two earthling terminals with necessary nuts, bolts and washers; Name and rating plate; Secondary terminal box with LV terminal connections; Mounting nuts, bolts and washers; L.V HRC cartridge fuses for the protection of secondary winding; Any other fitting deemed essential by the contractor shall also be supplied along

with each voltage transformer: The oil level gauge shall be mounted in such a way that the oil level can be clearly

seen from the ground level. The name and rating plate shall contain all the particulars as provided in IEC:186

and also the name of the employer and year of manufacture. They shall comply with the clause termed label in this specification.

7.11 SECONDARY TERMINAL BOX A dust, vermin and weather proof terminal box shall be provided at the lower end

of each voltage transformer for terminating the secondary windings. The box shall have a bolted removable cover plate complete with gaskets. The terminal box shall have cable gland plate and cable glands with shrouds suitable for entry of 4 core x2.5mm2 PVC insulated control cables as per IEC:227 or IS:1554.

For 33KV Voltage Transformer one 4 core 2.5mm2 The terminal box enclosure shall have protection of class IP 55 as defined in

IEC:529 or IS:13947 and shall be painted or galvanized in accordance with specification of Surface Treatment.

7.12 Terminal blocks Terminal blocks of brass studs rated for 10 Amps continuous current, 650 Volt

grade enclosed in moulded insulating materials shall be provided with adequate electrical clearance for terminating the secondary wiring and outgoing connections. The terminal blocks shall be suitable for termination of 2.5mm2 wires. The termination shall be made by crimping Jugs or bare wire with insulating sleeves at ends. All terminals must be marked with numbers and wire termination provided with numbered ferrules for identification.

7.13 Fuse protection The secondary windings shall be protected by HRC cartridge fuses in fuse holder

consisting of carriers and bases. The carriers and bases shall be of high grade flame retarding and non hygroscopic moulded insulating materials with hard glass surface. Each fuse shall be identified with engraved plastic label.

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7.14 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of the

terminal box cover. Labels shall be provided inside the cover to describe the functions of various items of equipments.

7.15 TERMINATION The equipment shall be supplied with HV electrical connection terminals of a size

and rating appropriate for all the duties, including overload duty specified for the equipment. The terminals shall be of the bi-metallic type, suitable for connection of all aluminium alloy conductor (AAAC) or aluminium conductor steel reinforced (ACSR). In general connections using palm type solderless sockets shall be preferred. Where the terminals are of the clamp type, they shall be suitable for taking a range of conductors appropriate to the rating of the equipment.

All nuts, bolts, washers and spring washers required to complete the connection

shall be supplied with the equipment. 7.16 EARTHING TERMINAL Two earthing terminals complete with necessary hardware shall be provided on

each voltage transformer for connecting to earth continuity conductors of the Employer. They shall be of electroplated brass and of adequate size to carry the earth fault current.

The earthing terminals shall be identified by means of appropriate symbol marked

in a legible and indelible manner adjacent to the terminals. 7.17 TEST AND INSPECTIONS The voltage transformers shall be tested in accordance with the requirements of

the type tests and routine tests as provided in the latest issues of IEC:186 or IS:3516.

The tests to be conducted shall include; 7.17.1 Type tests: Lightning impulse voltage test; High voltage power frequency wet withstand voltage; Temperature rise test; Short circuit withstand capability test; Determination of limits of voltage error and phase displacement. 7.17.2 Routine tests: Verification of terminal marking and polarity; Power frequency withstand tests on primary winding;

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Power frequency dry withstand tests on secondary winding; Power frequency withstand tests between sections; Determination of limits of voltage errors and phase displacement; Partial discharge measurement. Insulating Resistance measurement. 7.18 TEMPERATURE RISE The temperature rise of any part of the voltage transformer under continuous

operating and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in IEC publication 186 or IS:3156. These shall not be exceeded when corrected for the difference between the ambinent temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the bid.

8 PROTECTIVE RELAY & CONTROL PANEL a Outdoor control panels with protective relay and meter shall be provided by the

supplier suitable for above breakers. The equipment shall have protection scheme with the following relays:

(i) Triple pole IDMTL type combined over current (2Nos) & Earth fault (1No), Draw

out type, 24V DC Relays having Numerical Communicable relay suitable for both 1A & 5A CT secondary( site selectable) with IEC-60870 protocol and of make as AREVA/Schneider,JVS,ER,Megawin.

Plug setting range of the over current and earth fault relays shall be 5% to 250%. (ii) Master trip relay for inter tripping. (iii) One alarm bell scheme with bell (24V DC). N.B:-

1)The Master trip & Voltage relays should be Electro-mechanical type . 2) Communicable type NUMERCIAL RELAY suitable for both 1A & 5A CT

secondary( site selectable) with IEC-60870 protocol and of make as AREVA/Schneider,JVS,ER,Megawin.

9. METERS: The following meters shall be provided. i) Ammeter:- 0-200-400 A-1No Analogue/ Preferable Make IMP/ AE/DIP/RISHAV

make. ii) Volt meter:- 0- 15 KV – 1No Analogue/ Preferable Make IMP/ AE/DIP/RISHAV

make (for Transformer panels only). iii) Ammeter selector switch- 1 No. preferable Make- Kaycee or any other reputed

make.

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iv) Volt meter selector switch- 1No. preferable Make- Kaycee or any other reputed make.

v) 40 watt lamp with switch- 1 No. vi) Plug & Socket- 1 No. vii) Fuses & Links- 1 No. viii) Test terminal Blocks- Test terminal Block need be provided for testing

relays & ammeter. Ix) Space for fixing of energy meter is to be provided on Control panel (energy

meter is in CESU scope) ix) Indication Lamp- Red- Breaker ‘ON’ (24V DC LED type) Green Breaker ‘OFF’ Amber- Breaker ’AUTO TRIP’ Blue- Spring charge indication. White-Healthy Trip illuminated push bottom switch 10. OTHER EQUIPMENTS 10.1 Out Door Control- Relay Panel 10.1.1 General The electrical controls, relays, instruments, meters, annunciation scheme shall

be provided in a sheet steel enclosure conforming to IEC:298 or IS:3427 mounted on support base on the floor. The panel shall be free standing, dust, moisture and rodent and vermin proof suitable for outdoor installation. The panel shall have a high degree of protection for outdoor installation with relevant standard.

Each panel shall comprise of rigid welded structure frame enclosed completely

by metal sheet of thickness not less than 2mm. The sheets shall be cold rolled with smooth finish leveled and free from flaws. The structural frame and all load bearing members of the enclosure shall have minimum thickness of 2.5mm.

The enclosure shall have hinged door at the front and back for access to the

low voltage wiring. All door panels and removable covers shall be gasketed all round with neoprene bonded gasket. Ventilating louvers shall be provided to limit the temperature rise as provided in IEC:694 and 298 or IS:12729 and 3427. They shall be provided with filters encased in fine wire screens for non-ferrous metal or stainless steel unaffected by moisture and rain water. A 230V AC heater with auto temperature control shall be provided in the cabinet to prevent moisture condensation.

The housing shall be surface treated and painted in accordance with the clause

on Surface Treatment of this specification. 10.1.2 Panel wiring and accessories. 10.1.3 Wiring Each panel shall be supplied with all internal wiring complete.

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Panel wiring shall be suitably bunched and clamped for neat appearance. The conductors used for wiring purpose shall be PVE insulated 650/1100 volt grade semi-flexible heat resistant, flame retardant and vermin proof electrolytic copper cable conforming to IEC:227, 502 or IS:1554. The wiring shall be securely supported and taken though PVC through PVC troughs. Each wire shall be continuous from end to end without any joint in between. All panel wiring shall be capable of withstanding a voltage of 2KV AC 50Hz for one minute.

Cable and wire for connections within the switchgear and between the

switchgear and terminal blocks shall have a minimum temperature rating of 90 degree Celsius. The size of the conductors for panel wiring shall be not less than 2.5mm2. For CT secondary wiring, two such wires shall be used in parallel.

10.1.4 Panel wiring protection The panels shall be equipped with links and HRC cartridge fuses conforming to

IEC:269 or IS:13703 in 650 Volt grade phenolic moulded fuse holder consisting of fuse carrier and base or miniature circuit breakers conforming to IEC:947-2 or IS:13947-2 at appropriate locations. The carriers and bases shall be made of high grade flame retardant and non hygroscopic phenolic moulded material with hard glass surface. Each fuse or MCB shall be identified with engraved plastic label.

In general, fuses and MCBs shall be limited to the minimum required for safety.

The protection scheme shall include fuses for VT secondary circuits and DC supply to each panel and fuses for MCB for spring charging motor and incoming AC supply.

10.1.5 Terminal blocks Terminal blocks of brass studs rated for 10 amps continuous current, 650 volt

DC grade covered by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare conductor with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with numbered ferrules for identification. All numbering and marking including those in wiring diagram shall follow the guidelines provided in IS:11353. All circuit breaker auxiliary contracts including spare contacts shall be wired to the terminal blocks. Ten percent spare terminals shall be provided.

10.1.6 Colour and numbering The wiring used for 230V AC supply for illumination lamp, panel heater and

other devices shall be coloured red for phase wire and black for the neutral. The colour of wires connecting directly to Earth shall be black. All other panel wires shall be of one colour to be approved.

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Engraved core identification plastic ferrules marked to correspond with the panel wiring diagram shall be fixed at both ends of each wire. Ferrules shall fit tightly on the wire and shall not fall off when the wire is disconnected from the terminal block. Numbers 6 and 9, if used shall be under scored to enable differentiation.

10.1.7 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of

the door of the switchgear compartment. Labels shall be provided inside the compartment to describe the functions of the various items of equipment.

The scope of the supply shall include the panel mounting base plate and all

special equipment, bolts, nuts and washers necessary for making the supporting.

10.2 Supporting Structure The supply of the material shall be complete with mounting structures of mild

steel sections conforming to IS:226 or equivalent ISO. The supporting structure shall be designed and constructed to withstand the maximum combined effects of the circuit breaker dead weight, its maximum dynamic load and maximum effect of wind loading. The supporting structure shall be hot dip galvanized as per clause on surface treatment of this specification.

10.3 CT and PT mounting bracket The supporting structure shall be fitted with a bracket for supporting the three oil

filled 11KV single phase current transformers and 3 nos. 11KV(1 Phase)PTs. The support bracket shall be provided opposite the circuit breaker poles and shall ensure adequate clearance between the breaker poles and the CTs as well as between the CTs and PTs. The CTs & PTs shall be supplied by the Supplier as per specification above and is included in the scope. The drawings of the structure with bracket shall be subject to Purchaser’s approval before fabrication.

The CT and PT mounting bracket shall be hot dip galvanized as per clause on

surface treatment of this specification. 10.4 Local control cabinet The operating mechanism, local controls and monitoring shall be provided in a

metal clad control cabinet fitted to the same structure supporting the breaker and mounted at a convenient height for safe operation from ground level or from platform to be supplied under the contract.

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The cabinet shall be made of minimum 2.00mm sheet steel and shall be constructed as a dust, weather and vermin proof outdoor housing with protection of IP-54 class as defined in IEC:529 or IS:13947. It shall have single door and transparent windows for reading the circuit breaker ON or OFF position and spring charge position without opening the door. The door and any removable covers shall be gasketed all round with neoprene bonded gaskets. A ventilating louver shall be provided with fine wire non-ferrous metal or stainless steel screen and filter. A 230V AC heather with auto temperature control shall be provided in the cabinet to prevent moisture condensation and also a 230 volt lamp for internal illumination with door operated switch.

The local control cabinet shall be subjected to surface treatment and painting as

per clause on surface treatment of this specification. 10.5 Panel wiring and accessories Panel wiring shall be suitably bunched and clamped for neat appearance. The

conductor used for wiring purpose shall be PVC insulated 650 volt/ 1100V grade semi-flexible copper cable conforming to IEC:227 or IS:1554, heat resistant, flame, vermin and rodent proof. The wiring shall be securely supported and taken through PVC troughs. All panel wiring shall be capable of withstanding a voltage of 2KV AC 50Hz for 1 minute. Each wire shall be continuous from end to end without any joint in between.

The sizes of the control cable for wiring in the cabinet shall be not less than

2.5mm2. CT secondary wiring shall be though two such wires in parallel. 10.5.1 Fuse protection The cabinet shall be equipped with links and HRC cartridge fuses in 650 volt

grade fuse holders consisting of fuse carrier and base. The holders shall be made of high grade, flame retardant and non hygroscopic phenolic moulded material of dark brown colour with hard glass surface. Each fuse shall be identified with engraved plastic labels.

10.5.2 Terminal blocks Terminal blocks rated for 10 amps continuous current, 650 volt grade covered

by moulded insulating materials with adequate electrical clearances shall be provided for terminating the panel wiring and outgoing connections. The termination shall be made by crimping lugs or bare wire with insulating sleeves at ends. The arrangement can be horizontal or vertical as per standard practice adopted by the manufacturer. All terminals must be numbered and wire termination provided with numbered ferrule for identification. All numbering and marking include those in wiring diagram shall follow the guidelines provided in IS:11353. Ten percent spare terminals shall be provided.

10.5.3 Colours The wiring used for AC supply for illumination lamp and heater shall be

differently coloured from control wiring so that these can be distinguished from each other. The colour of all earth wire shall be black.

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10.6 Circuit diagram A durable copy of the circuit wiring diagram shall be affixed to the inner side of

the control cabinet. Labels shall be provided inside the cabinet to describe the functions of the various items of equipment.

10.7 Cable Entry A removable gland plate shall be provided at the bottom of the cabinet for entry

of Purchaser’s control and auxiliary power cables in the cabinet. Required number of electroplated brass cable glands of appropriate sizes with shrouds shall be provided in consultation with the Purchaser in the gland plate for the control and power cables. Provision shall be make for earthing of the cable armours in the gland.

11

OPERATING MECHANISM

11.1 General The operating mechanism of the circuit breaker shall be magnetic actuator /

motor wound spring charged type. It shall be electrically and mechanically trip free with anti pumping device (as per IEC:694 definition). All working parts in the mechanism shall be of corrosion resistant material. Self lubricating, wearing resistant bearings shall be provided in the mechanism.

The mechanism shall fully close the circuit breaker and sustain it in the closed

position against the forces of the rated making current and shall fully open the circuit breaker without undue contact bounce at a speed commensurate with that shown by tests to be necessary to achieve the rated breaking capacity in accordance with IEC:56 or IS:13118. The mechanism shall be capable of being locked in either the open or closed position. The mechanism shall be capable of fully closing and opening again after the auto-reclose time interval specified as 0.3 second in this specification.

11.2 Spring mechanism The spring operating mechanism shall be with spring charging motor, opening

and closing springs with limit switches and all accessories necessary for automatic charging. In normal operation, recharging of the operating springs shall commence immediately and automatically upon completion of the closing operation so that a complete sequence of closing and opening operation should be possible.

It shall be possible to hand charge the operating spring with the circuit breaker

in either the open or closed position conveniently from the ground level. Closure whilst a spring charging operation is in progress shall be prevented and release of the springs shall not be possible until they are fully charged.

The state of charge of the operating springs shall be indicated by a mechanical

device showing ‘SPRING CHARGED’ when closing spring is fully charged and operation is permissible and ‘SPRING FREE’ when closing spring is not fully charged and the operation is not possible. Provision shall be made for remote electrical indication of ‘Spring Charged’ and ‘Spring Free’ conditions.

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The operating mechanism shall be such that the failure of any auxiliary spring shall not cause tripping or closing the circuit breaker but shall not prevent tripping against trip command.

Closing action of the circuit breaker shall charge the opening spring ready for

tripping. From the close position with spring charged, one open-close-open operation shall be possible without recharging the spring.

11.3 Motor The motor for spring charging shall be single phase 230 Volt A. C motor.

Continuous motor rating shall be at least ten percent above the maximum load demand of the driven equipment. It shall remain within its rated capacity at all operating points that will arise in service. It shall be protected by H.R.C cartridge fuses or MCB. The motor shall comply with IEC:34 or IS:996.

12. AUXILIARY POWER SUPPLY The operating mechanism shall be suitable to operate with the following

auxiliary power supplies. a) 230V,50Hz Single phase

A.C- For spring charging motor

b) DC supply 24 Volts- For close and open coils, indication & Alarm

(Power pack input supply:230V & 110V AC and Output:24V DC with Battery Back up)

The DC supply shall be from a Power Pack. The Input to Power Pack is 110V

from PT and 230V from main supply. The power pack should be capable for minimum 3 Trippings even if input to power pack is failed.

The mechanism shall be designed to operate satisfactorily despite fluctuations

of auxiliary power supplies as under: AC supply: Voltage From 115% to 85% of normal voltage Frequency From 105% to 95% of normal frequency Combined voltage

and frequency variation

From 115% to 85% of normal

DC supply: Voltage From 120% to 70% of normal voltage 13. INTERLOCKS The circuit breaker shall be capable of being mechanically and electrically

interlocked with the associated line isolator so that the isolator cannot be operated with the breaker in the closed position.

All doors or shutters which give access to live parts shall be interlocked in such

a way that these cannot be opened unless the circuit breaker is in the open position.

Other interlocks shall be provided as deemed necessary for safety.

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14. PROTECTION AND METERING The circuit breaker shall be particularly suitable for the following protection

schemes: Inter-tripping for simultaneous tripping other circuit breaker. 15. TERMINAL CONNECTOR Suitable terminal connectors of bi-metallic type suitable for both horizontal and

vertical connection shall be provided on the terminal pad both on the incoming and the outgoing side for connection of jumpers of ACSR or AAAC conductor. The size of the conductor may vary between 100mm2 and 232mm2 depending upon the location of the circuit breaker. The terminal connection drawing and details are to be approved by the Purchaser before fabrication. The terminal connectors shall be bi-metallic type to avoid bi-metallic corrosion.

16. INSULATION AND CLEARANCE a) The insulation to ground, the insulation between open contacts and insulation

between phases of the circuit breaker shall be capable of satisfactorily withstanding dielectric test voltages.

b) The minimum clearance in open air shall be as follows: Between poles - As Per IS Phase to earth - As Per IS Ground clearance for live

part - As Per IS

17. TEMPERATURE RISE The temperature rise and the maximum temperature of any part of the circuit

breaker under continuous load condition and exposed in the direct rays of the sun shall not exceed the permissible limits as provided in Table V of IEC publication 694 or table 4 of IS:12729. These limits shall not be exceeded when corrected for the difference between the ambient temperature at site and the ambient temperature specified in the standard. The correction proposed shall be stated in the tender.

18. TESTS 18.1 Type and routine tests The circuit breakers shall be subjected to routine and type tests in accordance

with the standards listed in this specification including the following IEC and IS standards with the latest amendments:

Circuit breaker IEC:56 and IS:13118 and relevant other

standards Porcelain insulator IEC:233 and IS:5621 and relevant other

standards

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The tests shall include but not limited to the following: 18.2 Short circuit tests The circuit breakers shall be subjected to routine tests in accordance with the

standards listed in this specification including the following IEC and IS standards with the latest amendments: First the bidder shall manufacture One Proto type Model of ordered VCB as per approved drawing and GTP, match to the Type Test report and drawing as submitted earlier in the bid and as per following standards for successful Inspection and Testing during routine test before clearance for mass production.

The circuit breaker shall be capable of performing at least twenty five (25) open

operations at the rated short circuit current before maintenance or inspection is required.

18.3 Capacitive current switching Capacitive switching tests shall be performed in accordance with IEC:56 or

IS:13118 and IEC:17A/CD/474 at 1.3U preferably by direct test method or alternatively using synthetic method to IEC:427 or IS:13516. The test circuits shall simulate the most onerous site conditions.

18.4 Reactor Switching In addition to the capacitive current switching tests to IEC:56 or IS:13118 and

IEC:17A/CD/474, the circuit breakers shall be tested for shunt reactor switching in accordance with IEC:1233, Examination of the interrupter after the tests shall not show any evidence of surface tracking or erosion of contracts.

18.5 Dielectric tests At zero gauge loss of vacuum inside the interrupter chamber, the open

contracts shall withstand continuously, the rated phase to ground voltage and it shall be possible to break normal current in these conditions. During the dielectric type tests, no flashover external or internal shall be acceptable.

The circuit breakers shall be subjected to a power frequency AC voltage test for

one minute in dry and wet conditions and there shall be no external flash over to earth.

18.6 Mechanical endurance In addition to the requirements of IEC:56, an extended mechanical endurance

test is required to show that the circuit breaker is capable of at least 10,000 operations at no load in accordance with IEC:17A/474/CD. Between the specified test series in IEC:17A/474/CD, some maintenance such as lubrication and mechanical adjustment is allowed and shall be performed in accordance with manufacturer’s instructions. Change of contracts is not permitted.

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18.7 Low current switching The circuit breakers shall produce very low over voltage (<2.0 pu) on all

switching circuits inductive current including reactor switching to IEC-1233 and capacitive current switching to IEC:17A (Secretariat) 438 and IEC 17A/CD/474 the circuit breaker shall be re-ignition or re-strike free for all duties.

18.8 Duty requirement tests Apart from auto-reclosing and the other duties mentioned above, the breakers

shall be able to perform the following duties for which type tests are to be conducted as per IEC:56 or IS:13118.

1. Breaking the steady and the transient magnetising current of the transformer. 2. Breaking 25% of rated fault current at twice the rated voltage as per IEC/IS. 3. Cable charging breaking current. 4. Back-to-back capacitor bank breaking current. 5. Single capacitor bank breaking current. 6. Capacitor bank in rush making current. Test for the resistance of the main circuit shall also be conducted. 18.9 Temperature rise test Temperature rise test is to be conducted on the circuit breaker and the

accessories in accordance with IEC:56 or IS:13118. The temperature rise shall be limited as per this specification.

19. PERFORMANCE REQUIREMENTS The supplier shall declare the circuit breaker opening and closing times at 120

percent, 100 percent and 70 per cent of the rated voltage of the opening and closing devices when measured at the terminals of the trip and closing coils. The minimum make break time at rated voltage and total break time of the CB shall be stated. The total break time must not exceed 60m. sec.

20. EARTHING All metal parts not intended for carrying current or not alive shall be connected

to duplicate earthing system and suitable electroplated brass earthing terminals shall be provided on each circuit breaker in conformity with IEC:56 or IS:13118. Suitable identification mark for the earth terminals shall be provided adjacent to the terminal.

Earth continuity conductors shall be provided down to the ground level for earth

connection to purchaser’s earthing grid. It shall have sufficient cross sectional area to afford a low resistance path for the full fault current envisaged. Such conductor shall also be provided for the CTs up to the ground level.

The size of the earth continuity conductor shall be large enough to reduce the

potential rise of the metal frame of the breaker in the even of fault to minimum but in any case not more than 10V. The size of the conductor shall also be adequate to restrict the temperature rise without causing any damage to the earth connection in the case of fault. No riveted joints in the earth conducting path shall be permissible and only bolted joints of adequate size shall be provided with nuts, bolts and plain and spring washers. The surfaces to be jointed shall be perfectly flat without any unevenness to ensure that there is no contact resistance.

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An earth busbar of copper strip shall be provided inside the local control cabinet to which all earthing connections must be made. The earth busbar shall be terminated into two electroplated brass earthing terminals of adequate size with nuts, bolts and washers for connecting to earth continuity conductor mentioned above.

21.0 Mandatory Spare Parts for full Tendered quantity of 11 KV Outdoor VCB. The supplier should provide the mandatory spares as follows , free of

cost without any extra price for these spares parts. l. No. Description Requirement (Nos)

1 Vacuum Interrupter 5 2 Bottom Porcelain Housing 5 3 Top Porcelain Housing 3 4 Tripping Coil 5 5 Closing Coil 5 6 IDMTL 2O/C+1E/F Relay 5 7 Spring Charge Motor 3 8 Ammeter 3 9 Voltmeter 3 10 TNC 3

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SECTION - V

LIST OF ANNEXURES

(SCHEDULES AND FORMATS)

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Annexure-I

CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA

IDCO TOWERS (2nd Floor) Jana Path Bhubaneswar-751022 Phone:2545681, 2542895 Fax: 0674-2543125

ABSTRACT OF GENERAL TERMS AND CONDITIONS

For supply of 33KV & 11KV( O/D ) Vacuum Circuit Breakers

1. Whether the bidder is a Manufacturer & furnished relevant documents ( Factory Registration Documents ): Yes / No 2. Required Cost of Tender Furnished ( M.R / Bank Draft Details) -------------------------------------------------

3. Required Earnest Money Furnished:- Bank Draft Details to be furnished) --------------------------------------------------------------------------------------------------------------------------------------------------------------------------

4. Whether CPRI Type test certificates & Approved Drawings conducted within last 5 years enclosed with the bid: Yes / No 5. Manufacturer’s past supply experience

including user’s certificate furnished or not: - Yes / No

6. Audited annual reports along with Profit & Loss Accounts for the last 3 years furnished or not: Yes / No 7. Deviation to the specification , if any furnished

as per format at Annexure VI ( A) & VI (B) ):- Yes / No

8. Whether agreed to CESU’s Delivery schedule: Yes / No If agreed,

a) Date of commencement b) Rate of delivery per month

9. Whether agreed to CESU’s Guarantee clause 16 of Section III :- Yes / No 10. Whether agreed for 180 days’ validity period of Prices Yes / No 11. Whether the Prices are FIRM? Yes / No

12. Whether agreed to furnish security deposit in shape of

B.G. encashable at Bhubaneswar in case his tender is successful Yes / No

13. Whether agreed to stipulated penalty for delayed delivery: - Yes / No

14. Whether agreed to CESU’s standard terms of payment Yes / No

15. Valid ITCC & STCC furnished or not: Yes / No

Signature of the bidder With seal of company

This form is to be duly filled up & ink signed by the Bidder along with seal & submitted along with the Part-I of tender.

- 80 -

ANNEXURE – II

PROFORMA FOR COMPOSITE BANK GUARANTEE FOR SECURITY DEPOSIT, PAYMENT AND PERFORMANCE

This Guarantee Bond is executed this ____ day of ___________________________ 2008 by us the _____________________________________________________ Bank at ___________________ P.O.__________ P.S. ____________Dist ________________ State __________ Whereas ( indicate designation of purchaser ) the CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA , Head Office - IDCO Towers (2nd Floor ) , Bhubaneswar – 751 022 a Body corporate , constituted under the Electricity Act, 2003 (here in after called “the CESU”) has placed Purchase Order No._________ Dt.___________ (hereinafter called “the Agreement”) with M/s_________________ _________________________ (hereinafter called “the Contractor”) for supply of ________________ (name of the material) and whereas CESU has agreed (1) to exempt the Contractor from making payment of security deposit, (2) to release 100% payment of the cost of materials as per the said agreement and (3) to exempt from performance guarantee on furnishing by the Contractor to the CESU a composite Bank Guarantee of the value of 10% (ten percent) of the Contract price of the said Agreement. 1. Now, therefore, in consideration of the CESU having agreed (1) to exempt the Contractor for making payment of security deposit, (2) to release 100% payment to the Contractor and (3) to exempt from furnishing performance guarantee in terms of the said Agreement as aforesaid, we the ____________________ Bank, Address ____________________________ (code No. ________) (hereinafter referred to as “the Bank”) do hereby undertake to pay to the CESU an amount not exceeding Rs._____________ (Rupees _______________________________ ) only against any loss or damage caused to or suffered by the CESU by reason of any breach by the said Contractor(s) of any of the terms or conditions contained in the said Agreement. 2. We, the ______________________ Bank do hereby undertake to pay the amounts due and payable under the guarantee without any demur, merely on a demand from the CESU stating that the amount claimed is due by way of loss or damage caused to or suffered by CESU by reason of any breach by the said Contractor(s) of any of the terms or conditions contained in the said Agreement or by the reason of any breach by the said Contractor’s failure to perform the said Agreement. Any such demand made on the Bank shall be conclusive as regards the amount due and payable by the Bank under this Guarantee. However, our liability under this guarantee shall be restricted to an amount not exceeding Rs.___________ (Rupees _________________________________________ ) only. 3. We, the ________________________ Bank also undertake to pay to the CESU any money so demanded not withstanding any dispute or dispute raised by the Contractor(s) in any suit or proceeding instituted/ pending before any court or Tribunal relating thereto our liability under this Agreement being absolute and unrevocable. The payment so made by us under this bond shall be valid discharge of our liability for payment there under and the Contractor(s) shall have no claim against us for making such payment. 4. We, the _________________________ Bank further agree that the guarantee herein contain shall remain in full force and affect during the period that would be taken for the performance of the said Agreement and it shall continue to remain in force endorsable till all the dues of the CESU under by virtue of the said Agreement have been fully paid and its claim satisfied or discharged or till CENTRAL ELECTRICITY SUPPLY UTILITY OF ORISSA certifies that the terms and conditions of the said Agreement have been fully and properly carried out by the said Contractor(s) and accordingly discharge this guarantee and will not be revoked by us during the validity of the guarantee period. Unless a demand or claim under this guarantee is made on us or with_____________ ____________________________________ (Local Bank Name, address and code No.) _________________________________________________, Bhubaneswar in writing on or before __________________ (date) we shall be discharged from all liability under this guarantee thereafter.

Contd : - P/ 2

- 81 -

- P/ 2 -

5. We, the _________________________ Bank further agree that the CESU shall have the fullest liberty without our consent and without affecting in any manner our obligations hereunder to vary any of the terms and conditions of the said Agreement or to extend time of performance by the said Contractor(s) and we shall not be relieved from our liability by reason of any such variation or extension being granted to the said Contractor(s) or for any forbearance act or omission on part of the CESU or any indulgence by the CESU to the said Contractor(s) or by any such matter or thing whatsoever which under the law relating to sureties would but for this provisions have effect of so relieving us. 6. The Guarantee will not be discharged due to change in the name, style and constitution of the Bank and or Contractor(s). 7. We, the _________________________ Bank lastly undertake not to revoke this Guarantee during its currency except with the previous consent of the CESU in writing. Dated ___________ the __________ day of Two thousand _________ . Not withstanding anything contained herein above. Our liability under this Bank Guarantee shall not exceed Rs.______________ (Rupees _______ ____________________________________________________________________ ) only. The Bank Guarantee shall be valid up to _____________________ only. We or our Bank at Bhubaneswar (Name & Address of the Local Bank) are liable to pay the guaranteed amount depending on the filing of claim and any part thereof under this Bank Guarantee only and only if you serve upon us or our local Bank at Bhubaneswar a written claim or demand and received by us or by Local Branch at Bhubaneswar on or before Dt.__________ otherwise bank shall be discharged of all liabilities under this guarantee thereafter.

For _____________________________________ ( indicate the name of the Bank ) N.B.: (1) Name of the Contractor: (2) No. & date of the purchase order / agreement: (3) Amount of P.O.: (4) Name of Materials: (5) Name of the Bank: (6) Amount of the Bank Guarantee: (7) Name, Address and Code No. of the Local Branch: (8) Validity period or date up to which the agreement is valid: (9) Signature of the Constituent Authority of the Bank with seal: (10) Name & addresses of the Witnesses with signature: (11) The Bank Guarantee shall be accepted only after getting confirmation from the respective Banks.

- 82 -

Annexure- III ( PRICE SCHEDULE)

Price Schedule for Goods Offered as per specification No………………………. Name of Bidder_________________________ Page_______________________ of ___________.

5 6 7 1 2 3 4

Price for each unit

Unit Ex-Works Price

in Rs.

Unit Packing & Forwarding Charges in

Rs.

Unit Excise

Duty with cess in

Rs.

Unit Sales

Tax/ VAT in Rs.

Unit freight & insurance and costs

incidental to delivery in

Rs.

Unit Entry Tax, if any

in Rs.

Total Unit landing

Price in Rs.

Total Landing

Price in Rs. Tender

Specification No

Item Description Unit Qty

(a) (b) (c ) (d) (e) (f) a+b+c+ d+e+f

(col 4X6)

33KV Outdoor Vacuum Circuit Breaker

Nos 50 CESU/MR/

279/2012-2013 11KV Outdoor Vacuum Circuit Breaker

Nos 25

*( Rupees .............................................................................................................................................................)

Signature of Bidder With company seal______________________________________ Note:-1. In case of discrepancy between unit price and total, the unit price shall prevail. 2. Any column left blank shall be considered as included in the Unit Landing Price & the cost of the same shall be borne by the bidder. 3. The bidder(s) shall quote the applicable rates of taxes & duties in the price schedule. 4. The bidder(s) shall quote the unit price per no basis. Alternate offers shall be rejected outright. 6. Bidders shall quote for the 100% of the Tender quantities 33KV /11KV /both as mentioned in the above price schedule.

- 83 -

ANNEXURE- (IV) A

TECHINICAL DATA SCHEDULE FOR 33 KV OUTDOOR VACUUM CIRCUIT BREAKER

SL NO DESCRIPTION UNITS BIDDERS OFFER

1 GENERAL - Name of manufacturer

- Manufacturer’s type designation

- Governing standards

- No. of poles of circuit breaker no.

- No. of breaks per phase no.

- Total length of break per phase mm

Type – Vacuum Yes/No

2. NOMINAL VOLTAGE

- Rated voltage KV

Maximum(continuous)service rated voltage KV

3. RATED NORMAL CURRENT

- Under normal condition at 500C Amps

- Under site condition at 500C Amps

4. SHORT CIRCUIT PERFORMANCES

- Rated short circuit breaking current:

Symmetrical, rms KA Asymmetrical including DC

component KA - Rated short circuit making

current; peak KA - Short time current withstand

capability: Peak value KA Rms value KA Duration Sec 5.

MAX. TEMP. RISE OVER AMBIENT OF 500C

- At normal continuous current 0C

- After performing the operating sequence 0C

6 Make & Break Times

Total break times

- 84 -

At 10% rupturing capacity milli-sec

At rated rupturing capacity milli-sec

Arcing time at rated breaking current milli-sec

Make time from giving close command milli-sec

- Minimum reclose time at full rated interrupting Capacity from trip coil energisation sec

- Minimum dead time for 3 phase reclosing mill-sec

- Circuit breaker opening time:

at 125% of rated voltage of opening device milli-sec

at 100% of rated voltage of opening device milli-sec

at 70% of rated voltage of opening device milli-sec

- Circuit breaker closing time:

- Max. break time At 10% rupturing capacity milli-sec

at 125% of rated voltage of closing device milli-sec

at 100% of rated voltage of closing device milli-sec

at 70% of rated voltage of closing device milli-sec

7 RESTRIKING VOLTAGES FOR 100% RATED CAPACITY

- Amplitude factor KV

- Phase factor

- Natural frequency Hz

- Rate of rise of recovery voltage kv/µs

RATED INSULATION LEVEL

- Dry and wet power frequency withstand test voltage (rms) for 1 minute

Between live terminals and grounded objects KV

Between terminals with breaker contacts open KV

8

- 1.2/50 µsec full wave impulse withstand voltage +ve and - ve polarity (peak)

- 85 -

Between live terminals and grounded object KV

Between terminals with breaker contacts open KV

One mimute power frequency voltage of auxiliary wiring KV

9 OPERATING PERFORMANCE

- Rated transient recovery voltage KV/µs

Rated cable charging breaking current Amps.

Rated single capacitor bank breaking current Amps.

Rated back-to-back capacitor bank breaking current Amps

Rated capacitor bank in-rush making current KA

Rated small inductive breaking current KA

First pole-to-clear factor

Rated operating sequence

Rated out-of-phase breaking current KAmp

Re-ignition and Re-strike free Yes/ No

NUMBER OF OPERATION POSSIBLE WITHOUT MAINTENANCE

at full rated interrupting current no.

at 50% of rated interrupting current no

at 100% of full load current no

10

at no load no

MINIMUM CLRARANCE IN AIR

- Between phases mm

- Live parts to earth mm

11

- Live parts to ground level mm

WEIGHTS AND DIMENSIONS

Total weight of one complete breaker, including mounting structure kg

Mounting structure weight kg

12

Control cabinet weight kg

- 86 -

Dimensions: Height mm

Width mm

Depth mm

Drawings must be provided

13 HOLLOW INSULATOR HOUSING

Type and make of insulators.

Power frequency withstand test voltage for one minute:

- Dry KV

- Wet KV

Flash over value

- Dry KV

- Wet KV

1.2/50 impulse voltage withstand capability

- positive polarity KV

- negative polarity KV

Creepage distance total mm

Creepage distance protected mm

Weight of assembled housing kg

Corona shield provided or not

SUPPORT INSULATOR

Type and make of insulators

Power frequency withstand test voltage for one minute:

- Dry KV

- Wet KV

Flash over value

- Dry KV

- Wet KV

1.2/50 impulse voltage withstand capability

- positive polarity KVp

- negative polarity KVp

Creepage distance, total mm

Creepage distance, protected mm

Weight of assembled housing kg

14

Corona shield provided or not

15 CONTACTS

Type of main contacts

Type of auxiliary contacts

Material of auxiliary contacts

- 87 -

Type of plating, if any

Thickness of plating micron

Contact pressure gm/sq.mm

No of auxiliary contacts provided:

Those closed when breaker is closed no

Those open when breaker is closed no

Those adjustable no

OPERATING MECHANISM

Opening type

Closing type

Force applied by charged spring for closing kg

Time taken by motor for charging the spring form fully discharged to fully charged position sec

Full sequence of operation

Whether limit switches are provided with spring yes/no

Whether spring limit switches start & stop the motor yes/no

Type and material of spring employed

Whether trip free

16

Whether anti pumping device provided

17 AUXILIARY AND CONTROL POWER SUPPLY

Normal auxiliary A.C supply voltage Volts

Voltage limits for proper operation Volts

Maximum Volts

Minimum Volts

Frequency limits for proper operation

Maximum Hz

Minimum Hz

for circuit breakers : Volts

Normal DC control circuit voltage Volts

- 88 -

Voltage limits for proper operation

Maximum Volts

Minimum Volts

Power required for trip

coil Watts

Power required for

closing coil Watts LOCAL CONTROL PANEL

- Material

- Degree of protection

- Vermin proof provisions Yes/no

- Weather proof provision Yes/no

- Dust proof provision Yes/no

- Ventilation provision Yes/no

- Thickness of sheet materials used mm

- Overall dimensions mm

- Total weight kg

18

- Mounting arrangement

19 TERMINAL CONNECTOR

- Material

- Bi-metallic or not

- Weight kg

- Dimensions mm

- Size and type of conductor it can accommodate sq mm

- Terminal pads

silver plated or not

- Thickness of

silver plating microns

CORROSION PREVENTION SYSTEM FOR CIRCUIT BREAKER AND CONTROL CABINET

- Surface preparation

- Rust inhibition

- Zinc thickness/paint thickness microns

20

- Treatment of fasteners

- 89 -

CORROSION PREVENTION SYSTEM FOR SUPPORT STRUCTURE

Surface preparation

Rust inhibition

Zinc thickness microns

21

Treatment of fasteners.

VACUUM CIRCUIT BREAKER SEALING Degree of protection of circuit breaker pole enclosure. (IEC 529, IS 13947)

22

Method of sealing the circuit breaker pole enclosure.

23 33 KV CURRENT TRANSFORMER

Make of Manufacturer for

transformer protection

- Make and type of

transformer

- Ratio 400-200/ 1- 1A

Core1. VA Burden VA

Accuracy class

Saturation factor

Instrument security factor

Accuracy limit factor

Knee point voltage Volts

Magnetizing current at Vk/2

Milli amps.

Secondary resistance Rct ohms

Core 2. VA burden VA

Accuracy class

Saturation factor

Instrument security factor

Accuracy limit factor

Core 3. VA burden

Accuracy class

Saturation factor

Accuracy limit factor

Instrument security factor

Knee point voltage Volts

Magnetizing current

- 90 -

at Vk/2

Secondary resistance Rct Ohms

Short time current rating : Current KA

time Sec.

Impulse voltage withstand level KV

Power frequency voltage withstand level

Primary winding KV

Secondary winding KV

Specification of oil

Quantity of oil Liters

Creepage distance mm

Protected creepage distance mm

Weight of CT complete with oil kg

Corrosion Prevention System for CTs

Surface preparation

Rust in inhibition

Paint thickness micron

Treatment of fasteners

24

Oil resistance varnish

25 33 KV VOLTAGE TRANSFORMER

a. GENERAL.

Make

Type of transformer

Rated normal voltage KV

Rated maximum voltage KV

Rated primary voltage KV

Rated secondary voltage Volts

V A burden VA

Accuracy class

Ratio error Minute

Phase displacement positive or negative

- Saturation factor

- Instrument security factor

- Short time current rating

Rms value KV

Period Sec

Peak value KA

- 91 -

- Impulse voltage withstand level KV

One minute power frequency voltage withstand level of primary winding KV

- Specification of oil

- Weight of oil Kg

Weight of core and winding Kg

- Total weight Kg

Overall dimensions mm

Rated voltage factor

Continuous

For 30 seconds

- Temperature rise above the ambient of 500C 0C

- Correction factor

- Partial discharge level pC

TANK

- Composition of metal

b.

- Thickness mm

CORE

Material composition

Flux density at normal voltage and frequency Telsa

c.

Lamination thickness mm d. WINDINGS

Purity of copper used Percent

Type of insulation

Power frequency withstand level

Secondary winding to earth KV

Between sections KV

SECONDARY TERMINAL BOX

Degree of protection

Vermin proof provision Yes/no

Weather proof provision Yes/no

Dust proof provision Yes/no

Thickness of metal used mm

Overall dimensions mm

e.

Mounting arrangement

H V TERMINAL

- Material

- Bi-metallic or not Yes/no

f.

- Dimensions, mm

- 92 -

Size and type of conductor it can accommodate Sq. mm

CORROSION PREVENTION SYSTEM

(To be furnished as per clause on Surface Treatment)

Surface preparation

Rust in inhibition

Treatment of fasteners

g.

Oil resistance varnish

26 A.

INSTRUMENTS & METERS (Ammeter & Voltmeter)

1 Type & make of instruments & meter

2 Size mm

3 Whether magnetically shielded or not

4 Limits or error in the effective range

5 Scale length KV

6 Whether Tropicalised

7 Short time overload rating

8 V A Burden:

Current coil

Potential coil

9 Power consumption of current & potential coil

B. BACK UP RELAYS

1 Type of relay

Make

2 Current coil rating Amp

3 Tap range 4 VA Burden Highest tap &

lowest tap VA

5 Power consumption at highest tap & lowest tap Watts

6 Time of operation at maximum time dial seting at

i) 5 times tap setting current Second ii) 10 times tap setting current Second 7 Type of characteristic 8 Whether draw out type or not.

9 Trip contact ratings Amps.

Amp 10 Whether seal In contacts

provided or not 11 No. of contacts

- 93 -

12 Flag

C. High speed Tripping Relay

Type & make of the Relay

Voltage coil rating Volts

Contact(Hand reset)

Flag

D. POWER PACKS (2 X 12 V inbuilt Battery)

1 Rated AC voltage. (Input 230 V & 110 V AC) Volt

2 Single phase or three phase. 3 Capacity(VA)

4 Power factor

5 Type of transformer used, if any, to supply input to the rectifier

6 Transformation ratio

7 Type of rectification employed, full wave or half wave

8 Type of rectifier connection 9 Ripple factor

10 Type of filter employed

11 Ratings of capacitor

12 Time of retention of charge by capacitor

13 Value of DC constant.

14 Out put voltage(DC) Volt

15 Capacity (Watt-sec)

16 No of closing & tripping taken by this pack.

- 94 -

ANNEXURE- IV(B) TECHINICAL DATA SCHEDULE FOR 11 KV OUTDOOR VACUUM CIRCUIT

BREAKER for FEEDER PROTECTION

SL NO DESCRIPTION UNITS

BIDDERS OFFER

1 GENERAL

- Name of manufacturer

- Manufacturer’s type designation

- Governing standards

- No. of poles of circuit breaker

no.

- No. of breaks per phase no.

- Total length of break per phase

mm

Type – Vacuum

2. NOMINAL VOLTAGES

- Rated voltage KV

- Maximum(continuous)service rated voltage

KV

3. RATED NORMAL CURRENT

- Under normal condition Amps

- Under site condition Amps

4. SHORT CIRCUIT PERFORMANCES

- Rated short circuit breaking current:

- Symmetrical, rms KA

- Asymmetrical including DC component

KA

- Rated short circuit making current; peak

KA

- Short time current withstand capability:

Peak value KA

Rms value KA

Duration Sec

5 MAX. TEMP. RISE OVER AMBIENT OF 500C

- 95 -

- At normal continuous current

0C

- After performing the operating sequence

0C

6. MAKE AND BREAK TIMES

Total break times

- At 10% rupturing capacity milli-sec

- At rated rupturing capacity milli-sec

- Arcing time at rated breaking current

milli-sec

- Make time from giving close command

milli-sec

- Minimum re-closing time at full rated interrupting Capacity from trip coil energisation

milli-sec

- Minimum dead time for 3 phase reclosing

milli-sec

- Circuit breaker opening time:

at 125% of rated voltage of opening device

milli-sec

at 100% of rated voltage of opening device

milli-sec

at 70% of rated voltage of opening device

milli-sec

7 RESTRIKING VOLTAGES FOR 100% RATED CAPACITY

- Amplitude factor

- Phase factor - Natural frequency Hz

- Rate of rise of recovery voltage

Kv/µs

8 RATED INSULATION LEVEL

- Dry and wet power frequency withstand test voltage for one minute, rms:

- Between live terminals and grounded objects

KV

- Between terminals with breaker contacts open

KV

- 1.2/50 µs full wave impulse withstand voltage +ve and – ve polarity, peak

- 96 -

- Between live terminals and grounded object

KVp

- Between terminals with breaker contacts open

KVp

- One mimute power frequency voltage of auxiliary wiring

KV

9 OPERATING PERFORMANCE

- Rated transient recovery voltage

KVp

- Rated cable charging breaking current

Amps.

- Rated single capacitor bank breaking current

Amps

- Rated back-to-back capacitor bank breaking current

Amps

- Rated capacitor bank in-rush making current

KA

- Rated small inductive breaking current

KA

- First pole-to-clear factor

- Rated operating sequence

- Rated out-of-phase breaking current

KA

- Re-ignition and Re-strike free

10 NUMBER OF OPERATION POSSIBLE WITHOUT MAINTENANCE

- at full rated interrupting current

no.

- at 50% of rated interrupting current

no

- at 100% of full load current

no

- at no load no

11 MINIMUM CLRARANCE IN AIR

- Between phases mm

- Live parts to earth mm

- Live parts to ground level

mm

12 WEIGHTS AND DIMENSIONS

Total weight of one complete breaker, including mounting structure

Kg

- 97 -

Mounting structure weight Kg

Control cabinet weight Kg

Dimensions: Height mm

Width, mm

Depth mm

Drawings must be provided

13 HOLLOW INSULATOR HOUSING

Type and make of insulators.

Power frequency withstand test voltage for one minute:

- Dry KV

- Wet KV

Flash over value

- Dry KVp

- Wet KVp

1.2/50 impulse voltage withstand capability

- positive polarity KVp

- negative polarity KVp

Creepage distance total mm

Creepage distance protected mm

Weight of assembled housing Kg

14 SUPPORT INSULATOR

Type and make of insulators

Power frequency withstand test voltage for one minute:

- Dry KV

- Wet KV

Flash over value

- Dry KV

- Wet KV

1.2/50 impulse voltage withstand capability

- positive polarity KVp

- negative polarity KVp

Creepage distance, total mm

Creepage distance, protected mm

Weight of assembled housing Kg

Corona shield provided or not

15 CONTACTS

- Type of main contacts

- Type of auxiliary contacts

- Material of auxiliary contacts

- 98 -

- Type of plating, if any

- Thickness of plating

Micron

- Contact pressure gm/ sq.mm

No of auxiliary contacts provided:

Those closed when breaker is closed

no

Those open when breaker is closed

no

Those adjustable no

16 OPERATING MECHANISM

Opening type Closing type

Force applied by charged spring for closing

Kg / N

Time taken by motor for charging the spring form fully Discharged to fully charged position

sec

Full sequence of operation

Whether limit switches are provided with spring

Whether spring limit switches start stop the motor

Type and material of spring employed

Whether trip free

Whether anti pumping device provided

17 AUXILIARY AND CONTROL POWER SUPPLY

- Normal auxiliary A.C supply voltage

Volts

- Voltage limits for proper operation

Maximum Volts

Minimum Volts - Frequency limits for

proper operation

Maximum Hz

Minimum Hz

- 99 -

- Normal control circuit voltage

Volts

- DC Voltage limits for proper operation

Maximum Volts

Maximum Volts

- Power required for trip coil

Watts

- Power required for closing coil

Watts

18 LOCAL CONTROL PANEL

- Material

- Degree of protection

- Vermin proof provisions

- Weather proof provision

- Dust proof provision

- Ventilation provision

- Thickness of sheet materials used

mm

- Overall dimensions mm

- Total weight Kg

- Mounting arrangement

19 TERMINAL CONNECTOR

- Material

- Bi-metallic or not

- Weight Kg

- Dimensions mm

- Size and type of conductor it can accommodate

sq mm

- Terminal pads silver plated or not

- Thickness of silver plating

microns

20 CORROSION PREVENTION SYSTEM FOR CIRCUIT BREAKER AND CONTROL CABINET

- Surface preparation

- Rust inhibition

- Zinc thickness/paint thickness

Microns

,

- 100 -

- Treatment of fasteners

21 CORROSION PREVENTION SYSTEM FOR SUPPORT STRUCTURE

Surface preparation

Rust inhibition

Zinc thickness

Treatment of fasteners. Microns

22 VACUUM CIRCUIT BREAKER SEALING

Degree of protection of circuit breaker pole enclosure (IEC 529, IS 13947).

Method of sealing the circuit breaker pole enclosure.

23 CURRENT TRANSFORMER

1 Ratio: 400-200 / 1--1A

Make and type of transformer

Ratio

Core1. VA burden VA

Accuracy class

Saturation factor

Instrument security factor

Accuracy limit factor

Core 2. VA burden VA

Accuracy class

Saturation factor Accuracy limit factor

Short time current rating, time

KA / Sec.

Impulse voltage withstand level

KV

Power frequency voltage withstand level

Primary winding KV

Secondary winding KV

Weight of CT complete Kg

24 11 KV VOLTAGE TRANSFORMER (CAST RESIN TYPE)

a. GENERAL.

- 101 -

- Make

- Type of transformer

- Rated normal voltage

KV

- Rated maximum voltage

KV

- Rated primary voltage

KV

- Rated secondary voltage

Volts

- V A burden VA

- Accuracy class

- Ratio error

- Phase displacement positive or negative

Min

- Saturation factor

- Instrument security factor

- Short time current rating

Rms value KA

Period Sec

Peak value KA

- Impulse voltage withstand level

KVp

- One minute power frequency voltage withstand level of primary winding

KV

- Weight of core and winding

Kg

- Total weight Kg

- Overall dimensions Mm

- Rated voltage factor

Continuous

For 30 seconds

- Temperature rise above the ambient of 500C

0C

- Correction factor

- Partial discharge level pC

b. CORE

- Material composition (CRGO-M4 or better)

- Flux density at normal voltage and frequency

Telsa

- Lamination thickness

mm

c. WINDINGS

- Purity of copper used

Percent

- 102 -

- Type of insulation

- Power frequency withstand level

Secondary winding to earth

KV

Primary winding to earth

KV

d. SECONDARY TERMINAL BOX

- Degree of protection

- Vermin proof provision

- Weather proof provision

- Dust proof provision

- Thickness of metal used

- Overall dimensions

- Mounting arrangement

e. H V TERMINAL

- Material

- Bi-metallic or not

- Dimensions,

- Size and type of conductor it can accommodate

25 INSTRUMENTS & METERS (Ammeter , Volt Meter & Energy Meter)

A. 1. Type & make of Ammeter & voltmeter

2. Size

3. Whether magnetically shielded or not

4. Limits or error in the effective range

5. Scale length

6. Whether Tropicalised

7. Short time overload rating

8. V A Burden.

i) Current coil

ii) Potential coil

9. Power consumption current & potential coil

- 103 -

B. BACK UP RELAYS

1 Type of relay

Make

2 Current coil rating Amp

3 Tap range

4 V A Burden Highest tap & lowest tap

5 Power consumption Highest tap & lowest tap

Watt

6 Time of operation at maximum time dial setting at

7 5 times tap setting current

Sec

8 10 times tap setting current

Sec

9 Type of characteristic

10 Whether draw out type or not

11 Trip contact ratings Amps.

Amp

12 Whether seal in contacts provided or not

13 No. of contacts

14 Flag/LED C. High speed Tripping Relay

Type & make of the Relay

Voltage coil rating Volts

Contact(Hand reset)

Flag

D. POWER PACKS (2 X 12 V inbuilt Battery)

1. Rated AC voltage.(Input 230 V AC or 110 V. AC ).

Volt

2. Single phase or three phase.

3. Capacity(VA)

4. Power factor

5. Type of transformer used, if any, to supply input to the rectifier

6. Transformation ratio

7. Type of rectification employed, full wave or half wave

8. Type of rectifier connection

9. Ripple factor

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10. Type of filter employed

11. Ratings of capacitor

12. Time of retention of charge by capacitor

13. Value of DC constant.

14. Out put voltage(DC) Volt 15. Capacity (Watt-sec)

16. No of closing & tripping taken by this pack.

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ANNEXURE V (A)

(TECHNICAL DEVIATION FORMAT)

Clause

No Prescribed as per Tender

Specification Deviation in the bidder's Offer

Bidder’s Signature with Seal. N.B : The bidder has to mention all technical deviations in his offer which differs from the Technical Requirement of this Tender in above format. Deviations not mentioned in above format but mentioned in any other format or in any other part of the offer document shall not be considered as deviation and the bidder shall be deemed to have accepted our technical requirement without deviation.

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ANNEXURE V (B) (COMMERCIAL DEVIATION FORMAT)

Clause

No Prescribed as per Tender

Specification Provided in the bidder's Offer

Bidder’s Signature with Seal. N.B : The bidder has to mention all commercial deviations in his offer which differs from the Commercial Requirement of this Tender in above format. Deviations not mentioned in this format but mentioned in any other format or in any other part of the offer document shall not be considered as deviation and the bidder shall be deemed to have accepted our commercial requirement without deviation.

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ANNEXURE VI (PERFORMANCE OF MATERIALS SUPPLIED)

SCHEDULE OF PURCHASE ORDERS ALREADY EXECUTED TO ELECTRICITY

DISTRIBUTION UTILITIES / PSUs IN THE LAST 3 YEARS SPECIFICATION No CESU /P&S/MR/ 279. /2012-13

In this schedule details of purchase orders executed for tendered items during last 3 years shall be provided.

Bid No.__________ Date of Opening________ Name of the Firm__________________________________________

Date of Completion of Delivery Sl. No. Order placed by

(full address of purchaser)

Order No. and Date

Description and quantity of

ordered materials. As per Contract Actual

N.B : Attach copies of successful performance certificate / successful contract completion report / inspection report / Store Receipt Vouchers of the buyers with reference to above Purchase Orders.

Signature of the Bidder _______________________ ________________________ ________________________

Signature in ink of the bidder with company Seal (This form is to be duly filled up by the bidder & submit along with the Tender)

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(ANNEXURE-.VII)

SELF DECLARATION FORM

Name of the Purchaser:------------------------- Tender Specification No:-----------------------------

Sir, 1. I/we, the undersigned do hereby declare that, I/we have never ever been

blacklisted and / or there were no debarring actions against us for any default in supply of material / equipments or in the performance of the contract entrusted to us in any of the Electricity Utilities of India.

2. In the event of any such information pertaining to the aforesaid matter found at any given point of time either during the course of the contract or at the bidding stage, my bid/contract shall be liable for truncation / cancellation / termination without any notice at the sole discretion of the purchaser.

Yours faithfully,

Place- Date-

Signature of the bidder With seal

(This form shall be duly filled-up and signed by the bidder & submitted along with the original copy of the Bid.)