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ASSAM POWER DISTRIBUTION COMPANY LTD.

Project, Planning & Design

BID DOCUMENT FOR

DESIGN, MANUFACTURE, TESTING AND SUPPLY OF 33/11kV, 5 MVA & 33/11 KV, 10 MVA POWER TRANSFORMERS

SCHEME: “TRADE DEVELOPMENT FUND 2011-14” & ANNUAL PLAN:2011-12

NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14

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INDEX

Section – 1 Invitation for Bid

Section – 2 Tender Inviting Proposal-

Section – 3 Qualifying Requirement of the Bidder

Section – 4 Bid proposal sheet

Section – 5 Schedule of price and delivery --

Section – 6 Technical Specification & Guaranteed Technical Particulars

Section – 7 Forms of bid

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ASSAM POWER DISTRIBUTION CO. LTD. Bijulee Bhawan, Paltanbazar, Guwahati-781001

NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14

The Chief General Manager (PP&D), Assam Power Distribution Co. Ltd. Bijulee Bhawan,

Paltanbazar, Guwahati-1, invites tenders from reputed manufactures for design, manufacture and

testing, supply and despatch at site for 33/11kV, 5 MVA Power transformer and 33/11 KV, 10 MVA,

power transformer under TDF: 2011-14 & Annual Plan :2011-12 as per package given below.

Package No. Item Description Quantity Ernest Money

Average Annual Turnover

(last three years)

Package No.1:

TDF-2011-14/

P.TR./5MVA

Design, manufacture and

testing, supply and

despatch at site of

33/11kV, 5 MVA

90

(ninety)

nos.

₹. 25.00

Lakhs

₹.1000 .00

Lakhs

Package No.2

:TDF-2011-14

/P.TR./10MVA

Design, manufacture and

testing, supply and

despatch at site of

33/11kV, 10 MVA

8( eight)

nos.

₹.10.00

Lakhs

₹.1000.00

Lakhs

Location : Location are in jurisdiction of different circle of APDCL within State of Assam final location

will be as per field requirement.

The bidder can participate in either of the package or both the packages. Both the bids will be evaluated

separately.

Cost of Tender Paper: The tender paper, Bid documents can be obtained from the office of the

undersigned on payment of ₹ 12,000.00 (Rupees twelve thousand) only in the form of Bank

Draft/Banker’s cheque pledged in favour of “ASSAM POWER DISTRIBUTION CO. LTD.GUWAHATI-1”

on any working days from 08/07/2013. Alternatively, the Bid document can be downloaded from the

APDCL’s website: www.apdcl.gov.in for tender submission purpose. The Bidders using downloaded

document will attach an A/C Payee Demand Draft/Banker’s cheque (non refundable) of Rs.12000.00

( Rupees twelve thousand ) may be duly pledged in favour of “ASSAM POWER DISTRIBUTION

COMPANY LIMITED” with their Bids as cost of the tender papers. Bidders will ensure that documents in

full is downloaded and used.

Details may be seen in the website www.apdcl.gov.in

Chief General Manager (PP&D),

APDCL, 6th

floor, Bijulee Bhawan. Paltan bazaar, Guwahati-1

Memo No. CGM (PP&D)/ APDCL/TDF-2011-14&AP:11-12/Power Transformer/ Dated: Copy to: -

1. PS to the Chairman & Managing Director, APDCL, Bijulee Bhawan for kind appraisal of the CMD.

2. The CGM(D),LAR/UAR/CAR, APDCL, Bijulee Bhawan, Guwahati-1--- for favour of kind

information.

3. The PRO, ASEB, Bijiulee Bhawan, Paltan Bazar, Guwahati for publication of the above tender in

one issue of a “National paper” and “The Assam Tribune”.

4. The OSD to MD, APDCL, Bijiulee Bhawan, Paltan bazaar, Guwahati for publication in the official

website.

Chief General Manager (PP&D), APCDL

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SECTION 1

INVITATION FOR BID

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ASSAM POWER DISTRIBUTION CO. LTD. Bijulee Bhawan, Paltanbazar, Guwahati-781001

NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14

The Chief General Manager (PP&D), Assam Power Distribution Co. Ltd. Bijulee Bhawan,

Paltanbazar, Guwahati-1, invites tenders from reputed manufactures for design, manufacture ,

assembly testing at manufacturer’s works , supply and dispatch at store/site for 33/11kV, 5 MVA

Power transformer and 33/11 KV, 10 MVA power transformer under TDF: 2011-14 & Annual Plan

:2011-12 as per package given below.

Package No. Item Description Quantity Ernest

Money

Average Annual

Turnover

(last three years)

Package No.1:

TDF-2011-14/

P.TR./5MVA

Design, manufacture and

testing, supply and dispatch

at site of 33/11kV, 5 MVA

90 (ninety)

nos.

₹.25.00

Lakhs

₹.1000.00

Lakhs

Package No.2

:TDF-2011-14

/P.TR./10MVA

Design, manufacture and

testing, supply and dispatch

at site of 33/11kV, 10 MVA

8( eight)

nos.

₹.10.00

Lakhs

₹.1000.00

Lakhs

Location : Location are in jurisdiction of different circle of APDCL within State of Assam final

location will be as per field requirement.

The bidder can participate in either of the packages or both the packages. Both the bids will be

evaluated separately.

Cost of Tender Paper: The tender paper, Bid documents can be obtained from the office of the

undersigned on payment of ₹ 12,000.00 (Rupees twelve thousand) only (non-refundable) in the form

of Bank Draft/Banker’s cheque pledged in favour of “ASSAM POWER DISTRIBUTION CO. LTD.,

GUWAHATI-1” on any working days from 08/07/2013. Alternatively, the Bid document can be

downloaded from the APDCL’s website: www.apdcl.gov.in for tender submission purpose. The

Bidders using downloaded document will attach an A/C Payee Demand Draft/Banker’s cheque (non

refundable) of ₹.12,000.00 (Rupees twelve thousand) may be duly pledged in favour of “ASSAM

POWER DISTRIBUTION COMPANY LIMITED, Guwahati-1”” with their Bids as cost of the tender

papers. Bidders will ensure that documents in full is downloaded and used. The bidder who opted

for downloading has to intimate the authority about the downloading by e-mail at

cgmppd_aseb@hotmail.com. Any bid without payment of cost of tender for package as

above will be rejected outright; the date of purchase of said A/C payee Demand Draft/Banker

cheque should be within the date of issue of tender paper.

Details may be seen in the website www.apdcl.gov.in

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1. Source of Fund: Trade Development Fund 2011-14 & Annual Plan :2011-12

2. Average annual turnover: Average annual turnover of the bidder for last three consecutive

financial years against the package should be as per the requirements shown in the table.

3. Earnest Money Deposit (EMD) : Earnest money against each package should be as per

the requirements shown in the table

4. Delivery period: 210 (two hundred ten) days from the date of approval of GTP and

drawing. GTP and drawing should be submitted within 45 (forty five) days from the date of

issue of work order.

5. Delivery Schedule : To any place within the state of Assam ( details will be issued in due

course of time

6. Date of submission of Tenders: Up to 13-00 Hrs. of 30.07.2013

7. Bid validity: 240 (two hundred forty) days from the date of submission of Bid.

8. Pre-bid Discussion:-13-00Hrs 22.07.2013

9. Sale of Bid: Up to 11-00Hrs 30.07.2013

10. Date of submission of Tenders: Up to 13-00 Hrs. 30.07.2013

11. Date of opening of Bid:

a. Techno commercial bids will be opened at 13-30 Hrs.30.07.2013

b. The price bid on a date to be notified later on

12. Terms and condition

i) The Techno-Commercial & Price bids must be submitted in two separate sealed cover

superscripting the following on both the covers

a) Name of bidder with full address

b) Tender Notice No.

c) “ Techno-Commercial bid with earnest money” for envelope containing Techno-

commercial Bid and “ Price bid” for envelope containing the price bid.

ii) Earnest money as stipulated should be submitted with the Techno Commercial bid in the

form of Bank Call Deposit/NSC/Term Deposit/ BG of nationalized bank pledged in favour of

“ASSAM POWER DISTRIBUTION COMPANY LIMITED, Guwahati-1”. Any tender without

earnest money will be rejected outright.

iii) Price bids shall consist of price bidding schedule with quantity and prices filled up along with

relevant taxes and duties as applicable.

iv) Rates should be quoted both in figures and words legibly and no overwriting will be

accepted

v) The Company will not be responsible for any cost or expenses incurred on the preparation

or delivery of the bids.

vi) Quoted rate must be valid for a minimum of 240 days.

vii) The tender should be submitted in the office of the Chief General Manager (PP&D),

APDCL, Bijulee Bhawan, 6th floor, Paltanbazar, Guwahati-1 and will be opened on the

scheduled date & time in presence of the intending bidders.

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viii) The Company reserves the right to accept or reject any tender in part or in full or spilt the

work or cancel/withdraw the Notice inviting tender without assigning any reason thereof

whatsoever and in such case, no bidder/intending bidder shall have any claim arising out of

such action.

ix) The Company is not bound to accept the lowest quoted rate.

x) The Company reserves the right to split the quantity to be ordered amongst technically

qualified bidders

xi) The Company reserves the right to reduce the quantity or order them in full or part thereof in

phased manner and also may modify slightly the delivery schedule (destination) of

transformer at any time.

xii) The bidding documents are not transferable and cost of bidding document is not refundable

under any circumstances.

Chief General Manager (PP&D),

APDCL, 6th

floor, Bijulee Bhawan. Paltan bazaar, Guwahati-1

Memo No. CGM (PP&D)/ APDCL/TDF-2011-14/AP:11-12/Power Transformer/ Dated:

Copy to: -

1. PS to the Chairman & Managing Director, APDCL, Bijulee Bhawan for kind appraisal

of the CMD.

2. The CGM(D), LAR/UAR/CAR, APDCL, Bijulee Bhawan, Guwahati-1 for kind

information.

3. The PRO, ASEB, Bijiulee Bhawan, Paltan Bazar, Guwahati for publication of the

above tender in one issue of a “National paper” and “The Assam Tribune”.

4. The OSD to MD, APDCL, Bijiulee Bhawan, Paltan bazaar, Guwahati for publication in

the official website.

Chief General Manager (PP&D),APDCL

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SECTION 2

TENDER INVITING PROPOSAL

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ASSAM POWER DISTRIBUTION CO. LTD PROJECT, PLANNING & DESIGN

2. TENDER INVITING PROPOSALS WITH ADDITIONAL TERMS & CONDITIONS 2.1. Intent of the Tender Enquiry: The intent of the Tender Enquiry is to invite proposals from manufacturers

for design, manufacture, testing and supply of 90(ninety) nos. of 33/11kV, 5MVA, Power Transformers and

8 (eight) nos. of 33/11 KV, 10 MVA Power transformers.

2.2. Scope of Work: The scope of work involves design, engineering, manufacture, assembly, inspection, pre-

despatch , testing at manufacturer’s works, packing, supply and delivery at store/ site including insurance

during transit to store/site under different location of APDCL within the State on Assam.

2.3. Basic specification of the equipment to be supplied

Equipment to be supplied shall provide easy and effective:

Maintainability

Reliability

Availability

Long life

2.4. Submission of bid: The bidder can submit their bid in a sealed envelope as follows:

2.4.1. Techno-commercial bid: Techno-commercial bid should be submitted in a envelope Superscribing

“Techno-commercial bid” with name of bidder with full address, NIT reference etc. and under this, the

tenderer should submit

a) Earnest money deposit

b) Technical details along with type test certificate from Govt. approved test house.

c) Drawings.

d) Validity of offer

e) Terms of payment

f) Delivery schedule

g) Annual turnover

h) Order executing details

i) User’s performance Report

j) Tender proforma for techno-commercial Bid is enclosed as Annexure-I.

2.4.2. Earnest Money Deposit (EMD): The Tender must be accompanied with earnest money as mentioned

in the NIT and it is to be deposited in the form of Bank Call Deposit/NSC/Term Deposit/ BG of

nationalized bank or scheduled bank of RBI having their regional office in Assam or at least a branch

office at Guwahati ( in case of those , whose regional office is not located in the state of Assam) with a

certificate from the Bank to the effect that the verification or any confirmation in regard to the BG issued

by the bank can be taken up with the Branch office at Guwahati pledged in favour of “ASSAM POWER

DISTRIBUTION COMPANY LIMITED. Guwahati-1”. The EMD should be valid for 6 (six) months from

the date of submission of tender along with Techno- Commercial bid. The earnest money of the

unsuccessful bidders will be released on finalization of the tenders. The EMD to the successful bidders

will be released on submission of 10% Performance Security Deposit to the undersigned as per clause

2.11 of the bid document. The EMD of the successful bidder will be forfeited on non-acceptance of

Letter of Intent (LOI) within the stipulated period mentioned in LOI.

2.4.3. Price Bid

a) The price bid should be submitted in a separate envelope Superscripting “Price Bid” with

name of bidder with full address, NIT reference, etc.

b) The price bid should distinctly indicate the following components –quoted price with clear

differentiation of Ex-factory price, Freight & Insurance, Taxes and Duties

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2.4.4. The “Techno-commercial Bid” and “Price Bid” are to be submitted as mentioned above (i.e separately

under two separate sealed envelopes) and both the envelopes should be placed in a bigger envelope

superscripting name of bidder with full address, NIT reference etc. and addressed to Chief General

Manager(PP&D), APDCL, Bijulee Bhawan, 6th

Floor, Paltanbazar, Guwahati-781001.

2.4.5. Bidders should furnish order execution details of items of similar specification for a minimum of last

three years.

.

2.4.6. Each and every paper of the tender bid should be signed affixing seal by the bidder while submitting

tender/bid.

2.4.7. The Contractor shall furnish copies of test certificates of materials used for manufacture and also the

test certificates of the tests conducted on the equipment after manufacture. The contractor shall also

furnish the test certificate of bought out components for approval by the purchaser.

2.5. The bidders are to quote variable rates as per IEEMA price variation formula as on January 2012

with a sealing of ± 10%, with base date of JUNE’ 2013 in the schedule of price and delivery.

2.6. Telegraphic/ telex offer shall not be considered and tenders received after the due time even though

posted earlier shall not be accepted. The undersigned shall not be responsible for any postal delay.

2.7. Post tender revision of quoted rates and /or revision of terms and conditions having direct or indirect

impact on the quoted rate shall not be accepted and the offer could be rejected and earnest money shall

be forfeited. Withdrawal of offer within the quoted validity period shall not be accepted and if withdrawn the

offer, the earnest money shall be forfeited. Purchaser reserves the right for negotiation of rates, terms and

conditions only.

2.8. Opening of bid:

2.8.1. The techno-commercial Bid shall be opened on the due date and due time or on the next working day

in case of the due date being a holiday, in presence of the bidder or their authorized representatives.

2.8.2. The evaluation of bids will be carried out, first of techno-commercial bid and thereafter opening the

price bid of only those who qualify and meet the technical requirement.

2.8.3. The price bid of technically approved bidder will be opened on a separate date after due intimation.

2.8.4. Company reserves the right not to award the order to the price-wise lowest party if the party during

evaluation is found to be technically non responsive.

2.9. Terms of payment: 100% payment with all taxes and duties for each lot of supply will be released within

30 days from the date of receipt of materials in full and in good condition at store/ site, by the consignee.

Payment will be released by the CGM(PP&D), APDCL on receipt of the passed bill from consignee

subject to the following condition.

a) Supply should be strictly conforming to relevant technical specification

b) Bill in triplicate along with consignment note and other documents such as challan, packing, list with

revenue stamp where ever necessary should be sent to the consignee for onward transmission to this

office for payment. The challan to be submitted to the consignee for payment should have signature

with date and seal of the officer receiving the transformer.

c) Before dispatch, clearance from APDCL for each and every consignment /equipment should invariably

be obtained. Inspection report with detailed test results should be furnished along with each

consignment.

d) The supplier should intimate the undersigned the dispatch of every consignment along with supporting

documents for our record.

2.10. Insurance: You are requested to dispatch the materials duly insured to final destination against any

loss/damage in transit through your underwriter at your cost.

Please note that APDCL shall intimate you any loss, shortage, damage etc. of materials if any at

the time of taking delivery from the carrier within 30 days. Supplier shall arrange replacement of the

damage/losses/shortage etc. within 30 days of intimation without waiting for settlement of the claim from

the carrier/underwriter.

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2.11. Performance Security Deposit:

a) The successful manufacturer/ bidder shall have to deposit performance security deposit in the shape of

Bank Guarantee of nationalized bank or scheduled bank of RBI having their regional office in Assam or at

least a branch office at Guwahati ( in case of those , whose regional office is not located in the state of

Assam) with a certificate from the Bank to the effect that the verification or any confirmation in regard to the

BG issued by the bank can be taken up with the Branch office at Guwahati pledged in favour of “ASSAM

POWER DISTRIBUTION COMPANY LIMITED. Guwahati-1” as per proforma for an amount equivalent to

10% (ten percent) of the contract value of the supply order duly pledged in favour of “ASSAM POWER

DISTRIBUTION COMPANY LIMITED. Guwahati-1”. The BG should be furnished to the CGM(PP&D),

APDCL along with the acceptance of Letter of Intent (LOI). The validity of the BG should be initially for a

period of 60 (sixty) months from the date of issue of LOI with a provision for extension of the same to cover

the entire warranty period as per clause 2.12. If supplier fails or neglect to perform any of his obligation

under the contract, the APDCL shall have the right to forfeit in full or in part at its absolute discretion the

performance security deposit furnished by the supplier. No interest shall be payable on such deposits.

Detail order will be issued on receipt of acceptance of LOI and Performance security deposit.

2.12. Warranty : Warranty of the transformer will be for 60(sixty ) month the date of commissioning or 66 (sixty

six) months from the date of receipt of the materials at our store in good and acceptable condition

whichever is earlier.

2.13. Road Permit: Road permit will be arranged by the supplier on payment of entry tax which will be

reimbursed after submission of relevant document. The concerned DGM of the Circle (consignee) will

reasonably help in procuring the road permit.

2.14. The employer may ask the manufacturer to depute their engineer for supervision of commissioning work

of the transformer supplied for which the rate has been quoted by the bidder

2.15. The company reserves the right to split the quantity to be ordered amongst the technically qualified

bidders.

2.16. The Company reserves the right to reduce the quantity or order them in full or part thereof in phased

manner and also may modify the delivery destination of the transformer at any time.

2.17. Terms and conditions which are not specified herein above will be governed by APDCL’s General

Terms and Conditions of supply and erection in force which may be seen in APDCL website

www.apdcl.gov.in.

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SECTION 3 QUALIFYING REQUIREMENT

OF THE BIDDER

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QUALIFYING REQUIREMENT OF THE BIDDER

3.1. To be qualified for award of contract, the Bidder shall submit a written power of attorney authorizing the

signatory of the Bid to commit on behalf of the bidder and must compulsorily meet the following minimum

criteria.

3.1.1. The bidder should be a manufacturer of 33/11 kV Power transformers at least for a period of 5(five) years

as on date of submission of bids. He must have designed, manufactured; type tested and supplied

Power transformers and should list such works executed as Qualifying Requirement. The average

manufacture capacity during last 5(five) years must be at least 10% of the required quantity.

3.1.2. The bidder should have successfully manufactured on its own and not its financial or technical

collaborator, at least 30(Thirty) nos. of Power transformers during the last 3(three) years supported by

relevant documentary evidences.

3.1.3. The bidder must furnish performance report of Power transformers manufactured and supplied by the

bidder from at least two utilities. The report must be signed by an officer not below the rank of

Superintending Engineer/ Deputy General Manger of the utilities.

3.2. Each Technical Proposal must be accompanied by each of the following information/ documents with

sufficient details along with other documents and information mentioned elsewhere to enable the

purchaser to make an appraisal of the quality and suitability of the material and equipment offered.

3.2.1. Type test certificates of transformer of identical design from a NABL recognized laboratory, preferably at

CPRI laboratory. The Type test certificates should not be more than 5 (five) years old. The type rest

certificates should also be accompanied by the drawings of equipment tested so that the test certificates

can be directly linked to the equipments offered. In this regard following points shall also be noted:

3.2.2. Equipment which have not been type tested as above shall not be accepted. A promise or agreement by

a bidder to have the equipment tested after award of a contract is not acceptable.

3.3. Type Test reports to be acceptable must relate directly to the equipment offered. Type Test reports for a

higher class/rating of equipment are acceptable with a commitment from bidder that the type test will be

performed free of charge on the particular equipment after the award of contract without asking for

additional time of supply .. Guaranteed and Other Particulars in the formats given in Schedule - A at the

end of this Section. The bid should also be accompanied by manufacturer’s literatures and brochures

3.3.1. PERSONNEL CAPABILITY: The Bidder must have suitably qualified personnel to fill positions required

for contract implementations. The Bidder will supply information of the key personnel, design &

engineering staff, support staff, field staff giving details of experience in Power transformers

manufacturing and marketing process.

3.3.2. EQUIPMENT CAPABILITIES: The manufacturers' laboratory must be well equipped for complete range

of testing of Power transformers. They must have standard power source and standard equipment with

valid calibration certificates. The details of testing facilities available for conducting a) the routine tests

and b) the acceptance tests shall be furnished in a statement. The manufacturers' laboratory must also

have facilities for stage wise testing of parts during the manufacturing process. The details of these must

also be provided in a statement. Facilities available, if any, for conducting type test may also be

furnished. Detailed list of equipment of the factory used for manufacturing the Power transformers

including the testing equipment with make, year of manufacture, along with flow chart of the

manufacturing process is to be submitted. Bids without these details will be treated as non-responsive

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3.3.3. LITIGATION HISTORY Bidders shall submit details of all the litigation, arbitration or other claims,

whether pending, threatened or resolved in the last five years, with a cumulative impact of not more than

10 per cent of their total assets. The Purchaser may disqualify bidders in the event that the total amount

of pending or threatened litigation, arbitration or other claims represent more than 50 per cent of their

total assets.

3.4. BIDDING

3.4.1. Each Technical Proposal must be accompanied by each of the following information/ documents with

sufficient details along with other documents and information mentioned elsewhere to enable the

purchaser to make an appraisal of the quality and suitability of the material and equipment offered.

3.4.2. Guaranteed and Other Particulars in the formats given in Section – 5. The bid should also be

accompanied by manufacturer’s literatures and brochures.

3.4.3. The Bidder's offer shall include and substantiate data on qualifying requirements such as: Copies of

original documents defining the constitution or legal status, place of registration, and principal place of

business, written power of attorney of the signatory of the Bid to commit on behalf of the Bidder

3.4.4. Qualifications and experience of key site management and technical personnel proposed for the

Contract

3.5. Financial Capability : The bidder’s offer shall including the following-

3.5.1. Reports on the financial standing of the Bidder, such as profit and loss statements and auditor's reports

for the past five years.

3.5.2. Evidence of adequacy of working capital for this contract (access to line (s) of credit and availability of

other financial resources)

3.5.3. Authority to seek references from the Bidder's Bankers

3.5.4. Information regarding any litigation, current or during the last three years, in which the Bidder is

involved, the parties concerned, and disputed amount.

3.6. Bidders shall also submit proposals of work methods and schedule in sufficient detail to demonstrate the

adequacy of the bidders' proposals to meet the Purchaser's requirements and the completion time.

3.7. Even though the bidders meet the above qualifying criteria, they are subject to be disqualified if they

have:

3.7.1. Made misleading or false representations in the forms, statements and attachments submitted in proof of

the qualifying requirements,

3.7.2. Record of poor performance such as abandoning the works, not properly completing the contract,

inordinate delays in completions, litigation history, or financial failures etc.

Terms and conditions which are not specified herein above will be governed by APDCL’s General

Terms and Conditions of supply and erection in force.

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SECTION 4

BID PROPOSAL SHEETS (To be submitted by bidders)

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Annexure - I

Tender Proforma part – I (Techno-commercial Bid) NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14

1 Name and full address of the Tenderer.

2 Particulars of payment made for Purchase of tender document in

the shape of

3 Amount of earnest money paid and in the shape of

4 Whether Sales Tax clearance certificate submitted Yes / No

5 Sale Tax Registration No

6 Pan No (in case of firm must be in the name of firm

7 Acceptance of guarantee clause of Materials /equipment and

system Installed individually and for integrated operation. Yes/ No

8 Acceptance of penalty clause Yes/ No

9 Acceptance of terms of payment Yes/ No

10 Documentary evidence for manufacturing power transformer

during last five years Submitted/Not submitted

11 Type test certificate from NABL accredited laboratory Submitted/Not submitted

12 Details of manpower and T&Ps available with the firm Submitted/Not submitted

13 Performance certificate from at least two utilities Submitted/Not submitted

14 Guaranteed Technical Particulars as per Annexure II, III and IV Submitted/Not submitted

15 Reports on the financial standing of the Bidder, such as profit

and loss statements and auditor's reports for the past five years. Submitted/Not submitted

16

Evidence of adequacy of working capital submitted for this

contract (access to line (s) of credit and availability of other

financial resources)

Submitted/Not

17

Drawings Submitted With The Bid:

(i) General outline drawing

(ii) Height of centre line of HV and LV connectors of

transformers from the rail top level.

(iii) Dimensions of the largest part to be transported.

(iv) GA drawings/details of various types of bushing.

(v) Illustrative & descriptive literature of the Transformer.

Submitted/Not submitted

18 List of other documents enclosed

Power Of Attorney for signatory of bid

Signature with full name and designation of Bidder or his/her authorized representative with seal

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SECTION 5

Schedule of price and Delivery

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Price schedule ( for 33/11 KV,5MVA Power Transformer)

(To be filled by the bidder)

NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14 Package-I

Summary sheet

Total cost as per schedule-I

Total cost as per schedule -II

Grand Total

Signature of the Bidder with detail address

Particulars Tendered quantity Offered quantity

33/11kV, 5MVA power transformer

90 nos.

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Schedule-I :Price schedule for 33/11 KV,5MVA Power Transformer

Schedule-II Cost for supervision of testing and commissioning of one transformer

(5MVA) at site in ₹

Service tax(for one transformer) in ₹

Total cost for one transformer in ₹

Qty In nos.

Total cost in ₹

1 2 3=1+2 4 5=4x3

90

Bidder without showing breakup rate shall be rejected outright. Excise duty must be mentioned clearly in %. The bidders are to quote rates for all the items otherwise the bids are liable for rejection.

Signature of the Bidder with detail address

Sl no.

Item Unit QTY

Unit Ex factory price ₹

Excise duty

……..% ₹

Education cess

₹

Taxes CST/VAT

…..% ₹

F&I for any

locations ₹

Entry tax ₹

Total unit cost ₹

Total price ₹

1 2 3 4 5 6 7 8 9 10 11=(5+6+7+8

+9+10) 12=11x4

1 33/11kV 5MVA transformer No 90

2 Mandatory Spare

a Bushing a. High Voltage No 90

b Low Voltage No 90

c Neutral Bushing No 90

d Complete set of Gaskets for all opening on the Tank requiring Gasket

Set 90

e Magnetic Oil Level Gauge with low oil level Alarm Contacts

No 90

f Oil Temperature indicator with Alarm and Trip Contacts and maximum reading pointer

No 90

g Winding temperature indicator with Alarm and Trip Contacts and maximum reading pointer

No 90

h Set of all types of valves comprising one in each type Set 90

I Silicagel Breather No 90

j Buchholz Relay no 90

Total

20 | P a g e

Price schedule( for 33/11 KV,10MVA Power Transformer)

(To be filled by the bidder)

NIT No. CGM (PP&D)/ APDCL/TDF-2011-14&AP-2011-12/Power Transformer/14 Package-II

Summary sheet

Total cost as per schedule-I

Total cost as per schedule -II

Total

Signature of the Bidder with detail address

Particulars Tendered quantity Offered quantity

33/11kV, 10MVA power transformer

8 nos.

21 | P a g e

Schedule-III : Price schedule for 33/11 KV,10 MVA Power Transformer

Schedule-IV

Cost for supervision of testing and commissioning of one transformer

(5MVA) at site in ₹

Service tax(for one transformer) in ₹

Total cost for one transformer in ₹

Qty In nos.

Total cost in ₹

1 2 3=1+2 4 5=4x3

8

Bidder without showing breakup rate shall be rejected outright. Excise duty must be mentioned clearly in %. The bidders are to quote rates for all the items otherwise the bids are liable for rejection.

Signature of the Bidder with detail address

Sl no.

Item Unit QTY

Unit Ex factory price ₹

Excise duty

……..% ₹

Education cess

₹

Taxes CST/VAT

…..% ₹

F&I for any

locations ₹

Entry tax ₹

Total unit cost ₹

Total price ₹

1 2 3 4 5 6 7 8 9 10 11=(5+6+7+8

+9+10) 12=11x4

1 33/11kV 5MVA transformer No 8

2 Mandatory Spare

a Bushing a. High Voltage No 8

b Low Voltage No 8

c Neutral Bushing No 8

d Complete set of Gaskets for all opening on the Tank requiring Gasket

Set 8

e Magnetic Oil Level Gauge with low oil level Alarm Contacts

No 8

f Oil Temperature indicator with Alarm and Trip Contacts and maximum reading pointer

No 8

g Winding temperature indicator with Alarm and Trip Contacts and maximum reading pointer

No 8

h Set of all types of valves comprising one in each type Set 8

I Silicagel Breather No 8

j Buchholz Relay no 8

Total

22 | P a g e

SECTION- 6

Technical specification and Guaranteed technical particulars

(GTP)

23 | P a g e

TECHNICAL SPECIFICATIONS FOR 33/11kV POWER

TRANSFORMER

1.0 SCOPE OF SPECIFICATION:

1.1. : This specification is intended to cover design, manufacture, assembly testing at

manufacturer’s works, supply and delivery of three phase 50HZ, 33/11 KV Delta/Star, Vector

Group DYN 11, two windings copper would outdoor type, oil immersed, naturally air cooled

(ONAN) Power Transformer with off load tap changer for 10MVA , 5 MVA POWER

transformer.

1.2. The transformer offered shall be complete with all parts and accessories which are necessary

for their efficient and satisfactory operation The Transformer and all associated oil filled

Equipment shall be supplied complete with insulating new oil required for first filling including

10% extra oil for future use during commissioning. The Transformer tank shall be dispatched

completely filled with oil and the balance oil shall be supplied in non returnable sealed drums

along with the Transformers.

1.3. Such parts and accessories shall be deemed to be within the scope of this specification

whether specifically mentioned or not. Main tank body may be delivered in unpacked

condition, but delicate parts like indicating meter, radiator, conservator, Pressure Relief Valve,

equalizer pipe, buchholz relay etc. shall be packed to avoid damage due to transportation.

1.4. It may be noted that the Power Transformer must meet the following minimum criteria. Failure

to comply with the requirements may results in rejection of the BID as non-responsive:

1.5. The Manufacturer must have designed, manufactured, type tested and supplied power

transformers in at least two power utilities of similar rating which are in successful operation

for at least 5 (Five) years as on the date of bid opening. Which should be substantiated by

furnishing performance report by the official of the rank of minimum DGM/SE

1.6. The Manufacturer should have in-house Auto Clave facility

1.7. Impulse Test, Temperature Rise and Loss Measurement shall be carried out at CPRI / NABL

accredited Laboratory.

.

2.0 : CLIMATIC & ISOKERAUNIC CONDITION:

For the purpose of designing, the following condition shall be considered:

1. Maximum temperature of air in shade 40°C

2. Minimum temperature of air in shade 2°C

3. Maximum temperature of air in sun 45°C

4. Maximum humidity 100%

5. Average number of thunder storm days per 45 Days

annum

6. Maximum rainfall per annum 3500 mm

7. Average rainfall per annum 2200 mm

8. Wind pressure 97.8 Kg/m2

9. Altitude above MSL 100 to 1000 M

3.0 APPLICABLE STANDARDS

Unless otherwise stated, transformer shall be designed, constructed and tested in

accordance with provisions contained in latest revisions of following Indian standards and

Rules.

24 | P a g e

i. IS : 2026

ii. R.E.C. Manual 10/1976

iii. C.B. I.P. Manual on Transformer

iv. Technical Report 1: Section : A.D. (Revised: 1987)

v. C.B.I.P. Technical Report No. 72 (June: 1989)

vi. Indian Electricity Rules, 1956 (Amended up to date)

vii. IS : 2099 Bushing for alternating voltage above 1000 volt

viii. IS: 6600 Guide for loading of oil immersed transformer

ix. Specification for Transformer oil (IS-335 & IS-1866,1983)

x. Other applicable Indian Standards, or equivalent international

specifications

4.0 GUARANTEES

The bidder shall guarantee among other things the following:

a) Quality and strength of the material used.

b) Adequate factors of safety for all parts of equipment to withstand the mechanical

and on electrical stresses developed therein. These will be stated in the tender.

c) Suitability of the design and workmanship of the equipment for the conditions

envisaged in the specification.

d) Efficiencies, Temperature rise and other performance data on equipment which

shall be furnished in the tender.

5.0 WARRANTY

5.1. The bidder shall be responsible for replacing at site free of cost any part or parts of the

equipment that may prove faulty or fail manufacturing defects on one or more of the reasons

given in clause stated above within 60 (sixty) months from the date of commissioning or

66(sixty six) months from the date of receipt of the materials at our store in good and

acceptable condition whichever is earlier

5.2. In case of failure of the transformer, the supplier shall take back the faulty transformer from

its plinth for repair at their own cost (or replace the transformer with a new transformer) and

deliver, at their own cost, unload at the destination sub-station transformer plinth within 45

days, from the date of intimation of defects to the satisfaction of the owner, at free of cost. If

the repair/replacement will not be completed within 45 days, then the supplier shall pay

penalty @ 0.5% of the contract price for each calendar week of delay from the end of 45 days

from the date of intimation of defects. Also, the Purchaser reserves the right for forfeiture of

the total Composite Bank Guarantee and all the Securities, available with APDCL, in case the

Supplier fails to pay the penalty by one month before the expiry of the guarantee period. Also,

this will be taken as adverse in all future tenders.

5.3. The bidder shall furnish copies of test certificates of materials used for manufacture and also

the test certificates of the tests conducted on the equipment after manufacture. The contractor

shall also furnish the test certificate of bought out components for approval by the purchaser.

6.0 MISCELLANEOUS

6.1. Padlocks along with duplicate keys as asked for various valves, marshalling box etc. shall be

supplied by the contractor, wherever applicable.

25 | P a g e

6.2. Foundation bolt for wheel locking devices of Transformer shall be supplied by the bidder.

7.0 DELIVERY SCHEDULE:

The equipment shall be delivered FOR Destination as per schedule specified in the BPS

8.0 CONFLICT IN CLAUSE:

In case of any conflict between the Specific Technical Requirements and General Technical

Requirements the requirements indicated as Specific Technical Requirement shall prevail

over the General Technical Requirements

9.0 DEVIATION FROM SPECIFICATION

9.1. Normally the offer should be as per Technical Specification without any deviation. But any

deviation felt necessary to improve utility, performance and efficiency of equipment or to

secure overall economy shall be mentioned in the ‘Schedule of deviations” with full

justification, supported by documentary evidence. Such deviations, suggested, may or may

not be accepted. But deviations, not mentioned in the “Deviation Schedule” will not be

considered.

10.0 DRAWINGS INCORPORATING THE FOLLOWING PARTICULARS SHALL BE SUBMITTED WITH

THE BID:

10.1. The following drawings and details shall be furnished in triplicate along with the bid :

10.2. General Arrangement outline drawing with plan, elevation and end views showing various

dimensions of transformer and its vital component including height of the bottom most portion

of bushing from the bottom of base channel and also indicating thereon physical centre line

and position of centre of gravity.

10.3. Details of various types of bushing.

10.4. Three copies of sketches for height of crane hook above ground for lifting and untanking core,

shipping dimensions, complete lists of fittings and devices, net weights of core, winding, tank,

radiator, oil, conservator and total weight, fixing arrangement of transformer in foundation.

10.5. Illustrative & descriptive literature of the Transformer.

10.6. Maintenance and operation Instructions.

10.7. Type test certificates of similar transformers.

11.0 RATING AND GENERAL PARTICULARS:

11.1. Type: Core type, three phase, oil immersed, step down, two winding copper wound

transformer for outdoor installation.

11.2. Standard Rating:

Continuous with off circuit taps as mentioned in the schedule of requirement.

11.3. Continuous Maximum Rating and Overloads:

As regards maximum rating and temperature rise, all transformers shall comply with the appropriate

requirement of Indian Standards For the purpose of consideration of maximum temperature rise of

oil and winding, the following ambient temperatures are assumed.

i. Cooling medium : Air

ii. Maximum Ambient Air temperature: 50 °C.

iii. Maximum daily average ambient Air temperature: 40 °C.

iv. Maximum yearly weighted average temperature: 32 °C .

26 | P a g e

11.4. The transformer may be operated without danger on any particular tapping at the rated KVA

provided the voltage does not vary by more than +10% of the voltage at that tapping.

11.5. The transformer should be suitable for continuous operation with a frequency variation

of +3% from normal 50Hz. Combined voltage and frequency variation should not exceed

the rated V/f ratio by 10%

11.6. DUTY UNDER FAUALT CONDITION

11.7. It is to be assumed that normal voltage will be maintained on one side of the Transformer when

there is a short circuit between phases or to earth on the other side.

11.8. The transformer may be directly connected to an underground or overhead line and may be

switched into and out of service together with or without its associated incoming/outgoing line.

11.9. The thermal ability to withstand short circuit shall be Two seconds (2 Sec.) without injury for 3

phase dead short circuit at the terminals.

12.0 GENERAL TECHNICAL PARAMETERS

SN Particulars 33/11 KV Power Transformer

1. Rating 5MVA & 10 MVA

2. Number of Phases Three

3. Vector group Dyn-11

4. Type of installation Outdoor

5. Frequency 50HZ ( +/- )3%

6. Cooling Medium Insulating Oil

7. Type of Cooling ONAN

8. Highest continuous system Voltage

High Voltage :36kV

Low Voltage :12kV

9. Winding Connection

10. Winding Material Electrolytic Copper

11. High Voltage Winding DELTA

12. Low Voltage Winding STAR

13. Method of System Earthing Solidly grounded on LV side

14 Core Material CRGO ( M-4 / higher grade)

15 Type of Tap Changer OFF Load

16 Range of Tapping (+) 3% to (-) 9% in steps of 3%

on HV side

17 Maximum Current Density 2.5 Amp/ sqmm

18 Maximum flux density 1.6 Tesla

19 Type of Insulation and Insulation Level 33kV 11kV

a) Type of insulation Uniform Uniform

b) One minute power frequency withstand

Voltage(kV rms)

70kV 28kV

c) Lightning Impulse withstand voltage 170 75

20 Terminal Details

A 33kV Termination (i) ACSR/AAAC Wolf conductor,

Bus, (or IPs tube as applicable)

for connecting to bushing

terminals.

B 11 KV Termination Cable 300/630 mm2, 1-core Al.

Armoured XLPE Cable

21 Maximum Temperature rise over

27 | P a g e

ambient of 50° C

a) Temperature rise of top oil

40° C (measured by

Thermometer

b) Temperature rise of winding 45° C (measured by

resistance)

C) Maximum Winding temperature in Deg. C 105° C

d) Maximum Permissible value of Average

temperature of winding after 3 sec Maximum

Permissible short circuit:

250° C

12.1. Over load capacity As per IS: 6600 or equivalent international specifications

12.2. NOISE LEVEL AT RATED VOLTAGE & FREQUENCY: As per NEMA Pub TR-1.

13.0 GUARANTEED LOSSES

Sl No Particular 5 MVA 10 MVA

1. Impedance at rated MVA at 75° C

without (-) ve tolerance

7.15% 8.35 %

2. No Load Loss (at rated voltage and

rated current)

4.0KW 6 KW

3. Load Loss at 75° C (at rated voltage and

rated current)

24KW 44 KW

Tolerance of losses shall be guided by the relevant clauses of relevant IS standard. The bidder

shall state both no load loss and load loss at rated voltage and frequency and loss figures shall

be firm and guaranteed.

14.0 Evaluation of Losses:

14.1. For the purpose of comparison of bids, the capitalized cost of iron loss (KW) and load

losses (KW) shall be added to the quoted price of transformer at the following rates.

3.1.1 Iron loss per KW – ₹ 287 834.00

3.1.2 Copper loss per KW – ₹ 86,349.00

14.2. If any or all actual losses after test are found to exceed the guaranteed value, the penalty

will be imposed on the excess loss over the corresponding guaranteed loss (any or all).

The penalty shall be calculated for the excess of no load loss and for the excess of the

load losses at rates specified above. For fraction of a KW the penalty shall be applied

prorate basis. If the test figure of. losses are less than the guaranteed value, no bonus will

be allowed. Any changes in the figure assigned for transformer losses will not be permitted

after opening of bids and bid evaluation will be carried out on the basis of information

made available at the time of bid opening.

28 | P a g e

15.0 SHORT CIRCUIT CALCULATIONS

15.1. Manufacturer shall submit theoretical calculations in support of the ability to withstand

short circuit on consideration of highest value that may

16.0 PERFORMANCE CERTIFICATES

16.1. Copies of performance certificates of sImilar Equipment supplied to various utilities shall

have to be furnished along with Tender

17.0 LIST OF PAST SUPPLIES

17.1. The bidder shall furnish documents in support of Supply, Delivery of similar Equipment

indicating thereon names of the organization, quantity ordered, quantity supplied along

with tender.

18.0 DESIGN, STANDARDIZATION AND GENERAL CONSTRUCTION FEATURES

18.1. .All material used shall be best quality and of the class most suitable for working under the

conditions specified and shall withstand the variations of temperature and atmospheric

conditions without distortion or deterioration or the setting up of undue stresses which may

impair suitability of the various parts for the work which they have to perform.

18.2. Large parts, particularly removable ones, shall be interchangeable. Pipes and pipe fittings,

screws, studs, nuts and bolts used for external connections shall be as per the relevant

standards. Steel bolts and nuts exposed to atmosphere shall be of hot deep galvanized

18.3. Nuts, bolts and pins used inside the transformers and tap changer compartments shall be

provided with lock washers or locknuts. Exposed parts shall not have pockets where water

can collect.

18.4. Internal design of transformer shall ensure that air is not trapped in any location. Material

in contact with oil shall be such as not to contribute to the formation of acid in oil. Surface

in contact with oil shall not be galvanized or cadmium plated.

18.5. Labels, indelibly marked shall be provided for all identifiable accessories like relays,

switches, current transformers etc. All label plates shall be of in corrodible material.

18.6. All internal connections and fastening shall be capable of operating under overloads and

over-excitation, allowed as per specified standard without injury.

18.7. Transformers and accessories shall be designed to facilitate proper operation, inspection,

maintenance and repairs. No patching, plugging, shimming or other, such means of

overcoming defects, discrepancies or errors will be accepted.

19.0 CORES :

19.1. The Core shall preferably be boltless and step lap design and CRGO to be procured

directly from CRGO supplier or from their accredited agent supported by necessary

documentary evidence for.

19.2. Core shall have magnite coating as insulation. Successful bidder will offer the core for

inspection and/or approval by the purchaser during manufacturing stage.

19.3. Manufacturer’s call notice for the purpose should be accompanied with the following

documents as applicable as a proof towards use of prime core materials:

i) Invoice of the supplier

ii) Mill’s Test Certificate

iii) Packing Lists

iv) Bill of landing

v) Bill of entry Certificate to Customs Core materials shall be procured either from the core

manufacturer or through their accredited marketing organisation of repute. Bidder should

preferably have in-house Core cutting facility for proper monitoring and Control on quality.

The materials used for insulation shall have high inter lamination resistance and rust

inhibiting property. It shall not have any tendency to absorb moisture or to react with

insulating oil.

29 | P a g e

19.4. The assembled core shall be securely clamped on the limbs and yoke with uniform

pressure so as to minimise noise emission form it.

19.5. The top main core clamping structure shall be connected to the tank body by a copper

strap. The bottom clamping structure shall be earthed by one or more of the following

methods

1. by connection through vertical tie rods to the top structure

2. by direct metal to metal contact with the tank base by the weight of the core and

windings,

3. by a connection to the top structure on the same side of core the main earth

connection to the tank.

19.6. All parts of the cores shall be robust design capable of withstanding any shocks to which

they may by subjected during lifting, transport, installation and service.

19.7. Adequate lifting lugs shall be provided to enable the core and winding to be lifted.

19.8. Adequate provision shall be made to prevent movement of the core and winding relative to

the tank during transport and installation or while in service.

19.9. The supporting frame work of the cores shall be so designed as to avoid the presence of

pockets which would prevent complete emptying of the tank through the drain valve or

cause trapping of air during filling.

19.10. The insulation structure for the core to bolts and core to clamp plates shall be such as to

withstand a voltage of 2000 VAC at 50HZ for one minute

.

20.0 FLUX DENSITY OF CORE

20.1. The maximum flux density in any part of the core and yokes at principal (normal) tapping

and at rated frequency shall not exceed 1.6 Tesla (16000 lines per sq.cm) at normal

voltage and 1.9 Tesla (19000 lines per sq.cm) under overvoltage condition as specified in

this specification.

20.2. Prior to inspection and testing of the Transformer the supplier shall submit on request

following curves of the core manufacturer.

i) Flux density vs Core loss.

ii) Flux density vs Excitatioin

21.0 WINDING:

21.1. All windings shall be fully insulated. 12.02 Power transformer shall be designed to

withstand the impulse and power frequency test voltages specified in clause no. 9.01.

21.2. The windings shall be designed to reduce to a minimum the out of balance forces in the

transformer at all voltage ratios.

21.3. The insulation of Transformer winding and connections shall be free from insulating

material liable to soften, ooze out shrink or collapse and shall be non-catalytic and

chemically inactive to transformer oil during service.

21.4. The stacks of windings shall receive adequate shrinkage treatment before final assembly.

Adjustable device shall be provided for taking up any possible shrinkage of coils in

service.

21.5. All the insulating materials to be used in the transformer shall preferably be of class- A

insulation as specified in Indian Standards. The test certificate of the raw materials shall

be made available by the Transformer manufacturer on request during inspection and

testing.

21.6. The coil clamping arrangement and the finished dimensions of any oil ducts shall be such

that it will not impede the free circulation of oil through the ducts.

30 | P a g e

21.7. The windings and connection of transformer shall be braced to withstand shocks which

may occur during transport or due to switching short circuit and other transient conditions

during service.

21.8. Coil clamping rings, if provided shall be of steel or suitable insulating material. Axially

laminated material other than bakelised paper shall not be used.

22.0 INTERNAL EARTHING ARRANGEMENTS:

22.1. General : All metal parts of the transformer with the exception of the individual core

laminations, core bolts and associated individual clamping plates shall be maintained at

fixed potential.

22.2. Earthing of coil clamping rings : Where coil clamping rings are of metal at earth

potential, each ring shall be connected to the adjacent core clamping structure on the

same side of transformer as the main earth connection.

23.0 TANKS:

23.1. Construction : Conventional type tank shall be constructed. The Transformer tank and

cover shall be fabricated from good commercial grade low Carbon steel suitable for

welding and of adequate thickness. The tanks of all transformers shall be complete with all

accessories and shall be designed so as to allow the complete transformer in the tank and

filled with oil, to be lifted by crane or jacks, transported by rail, road without overstraining

any joint and without causing subsequent leakage of oil.

23.2. The main tank body shall be capable of withstanding vaccum gauge pressure 68.0 KN

per Sq, metres ( 500 mm. of HG).

23.3. The under carriage of the tank shall be made of channel of suitable size and design. The

base of each tank shall be so designed that it shall be possible to move the complete

transformer unit by skidding in any direction without injury when using plate or rails.

23.4. Where the base is of a channel construction, it shall be designed to prevent retention of

water. Tank stiffeners shall be designed to prevent retention of water.

23.5. Wherever possible the Transformer tank and its accessories shall be designed without

pockets wherein gas may accumulate. Where pockets cannot be avoided, pipes shall be

provided to vent the gas into the main expansion pipe.

23.6. All joints other than those which may have to be broken shall be welded when required

they shall be double welded. All bolted joints to the tank shall be fitted with suitable oil tight

gaskets which shall give satisfactory service under the operating conditions and

guaranteed temperature rise conditions. Special attention shall be given to the methods of

making hot oil tight joints between the tank and the cover as also between the cover and

bushing and all other outlets to ensure that the joints can be remade at site satisfactorily.

24.0 TANK COVER

24.1. :Each tank cover shall be of adequate strength and shall not distort when lifted. Inspection

openings shall be provided as necessary to give easy access to bushings or changing

ratio or testing the earth connection. Each inspection opening shall be of ample size for

the purpose for which it is provided. The tank cover and inspection cover shall be provided

with suitable lifting arrangement.

24.2. The tank cover shall be fitted with pockets for thermometer and for the bulbs of Oil and

Winding temperature indicators. The thermometer pocket shall be fitted with a captive

screwed top to prevent the ingress of water. Protection shall be provided, where

necessary, for each capillary tube. The pocket shall be located in the position of maximum

oil temperature and it shall be possible to remove the instrument bulbs without lowering

the oil in the tank.

24.3. Turrets should provided on tank cover to house the bushings. The turrets of both HV & LV

bushings should be connected through pipes with main tank Buchholtz Relay pipe to drive

out trapped air or should have air release plug to drive out trapped air as the case may be.

31 | P a g e

25.0 OFF LOAD TAP CHANGER.

25.1. The transformers shall be provided with voltage control equipment of the tap changing

type on the HV side for HV variation of +3% to (-) 9% in equal 5 steps of 3.0% for varying

its effective transformation ratio whilst the transformers are off-load. The tap changing

device shall be off-circuit type. The tap changing shall be carried out by means of an

externally operated tapping switch capable of being located and locked in any required

position.

25.2. The location of tap changing device shall be such that an operator can very easily change

the tap, while standing on the ground without the aid of any climbing platform. A warning

plate indicating that switch shall not be operated in “ON” position is to be provided.

25.3. The contact resistance between the contact points should be less than 20µΩ. The

manufacturer should show the resistance to the inspector at the time of inspection.

26.0 CONSERVATOR VESSELS.

26.1. Conservator vessels : The conservator should be air cell/ atmoseal type to prevent direct

contact of Transformer oil with atmospheric air for retarding oxidation contamination of oil.

The Air cell shall be made from suitable material with inner coating resistant to transformer

oil & outer coating resistant to ozone & weathering.

26.2. The conservator shall be provided with necessary valves to drive out the air in the space

between conservator wall & air cell during filling of oil, drain valves for complete draining of

oil and cut off valves etc.

26.3. The conservator complete with necessary valves shall be provided in such a position as

not to obstruct the electrical connections to the transformer from H.V & L.V SIDE.

26.4. The conservator shall be a capacity to meet the requirement of expansion of the total cold

oil volume in the Transformer & cooling equipment.

26.5. The conservator shall be designed so that it can drain oil completely by means of the drain

valve provided when mounted. One end of the conservator shall be bolted into position so

that it can be removed for cleaning purpose.

26.6. The conservator shall be provided with different valves for filling of oil manually at site.

27.0 OIL GAUGES

27.1. Normally one Magnetic type oil gage shall be provided. The oil level at 30 Deg. C. shall

be marked on the guage.

27.2. CONNECTION : The oil connection from the transformer tank to the conservator vessel

shall be arranged at a raising angle of 3 to 9 degrees to the horizontal up to the Buchholtz

Relay and shall consist of pipe with inside diameter 50 mm./80 mm. as per capacity of the

Transformer and as per IS:3639 or equivalent international specifications.

27.3. Two valves shall be provided between the conservator & Transformer main tank to cut off

the oil supply to the transformer after providing a straight run of pipe for at least a length of

five times the internal diameter of the pipe on the tank side ofthe Gas and Oil actuated

Relay and at least three times the internal diameter of the pipe on the conservator side of

the Gas and Oil actuated Relay. The valves should be fitted on both side of the Gas and

Oil Actuated Relay.

28.0 BREATHER :

28.1. Each conservator vessel shall be fitted with a glass container type breather in which

silicagel is dehydrating agent and so designed that the passage of air through the silicagel

the external atmosphere is not continuously in contact with the oil.

. The moisture absorption indicated by a change in colour of the tinted crystals can be easily

observed from the distance.

28.2. All breathers shall be mounted at approximately 1400 mm above ground level and shall

be connected to the air cell of the conservator through pipe for the purpose of breathing

during contraction or expansion of the air cell.

32 | P a g e

29.0 BUSHINGS

29.1. Bushings for HV side 36 KV ,630 Amp, Insulation level :70KV/170KV and for LV side 12

KV, 630 Amp, Insulation level :28KV/70KV) shall be of solid porcelain type. These

bushings shall be suitable for bare ACSR Wolf/ Panther conductor connections.

29.2. The bushing shall have sufficient insulation to avoid leakage to ground and shall be so

located as to provide adequate electrical clearance between bushing or various voltages

and between bushings and grounded parts. The insulation class of the high voltages

neutral bushing shall be properly co-ordinated with the insulation class of the neutral of the

high voltage winding.

29.3. Stresses due to expansion and contraction in any part of the bushing insulator shall not

lead to the development of defects. Outdoor insulators and fittings shall be unaffected by

atmospheric conditions due to weather, fuses, ozone, acids, dust and rapid changes of air

temperature. Any stress shield shall be considered as integral part of the bushing

assembly.

29.4. Porcelain shall not engage directly with hard metal and where necessary gaskets shall be

interposed between the porcelain and the fittings. All porcelain clamping surface in contact

with gasket shall be accurately grounded and free from glaze

29.5. Fixing material used shall be of suitable quality and properly applied and shall not enter

into chemical action with the metal parts or cause fracture by contraction expansion in

service. Cement thickness shall be as small and even as possible and proper care shall

be taken to centre and locate individual parts correctly during cementing. All porcelain

insulators shall be designed to facilitate clearance.

29.6. Each porcelain bushing or insulator, and paper bushing shall have marked upon it the

manufacturer’s identification mark, and such other marks as may be required to assist in

the representative selection of batches for the purpose of the sample tests.

29.7. Clamps and fittings shall be made of steel and galvanized. The bushing flanges shall not

be re-entrant type (shape) which may trap air.

29.8. Each bushing shall be so coordinated with the transformer insulation, that the flashover

will occur outside the tank.

29.9. All porcelain used in bushings shall be of wet process, homogeneous and free from

cavities or other flaws. The glazing shall be uniform in colour (brown) and free from

blisters, burns and other defects. Porcelain shall be thoroughly vitrified and shall be

impervious to moisture.

29.10. All bushing shall have puncture strength greater than dry flashover value.

29.11. Creepage distance will be kept 27 mm/KV. Bushings may be provided with weather shield.

29.12. The bidder is requested to give the guarantee withstand voltage for the above and also

furnish a calibration curve with different settings of the co-ordination gap to enable the

purchaser to decide the actual gap settings. Tenderer’s recommendations are also invited

to this respect. During spark gap flashover, the arc shall remain away from the housing

insulator.

29.13. Each terminal (including neutral) shall be distinctly marked and coloured for phase voltage

and phase rotation on the primary secondary and tertiary sides in accordance with the

diagram of connection supplied with the transformer, the system of marking shall conform

IS 2026-1962 amended upto date.

29.14. Stress due to expansion and contraction in any part of the bushing shall not lead to

deterioration.

29.15. Bushing shall be designed and tested to comply with the applicable standards.

29.16. Bushings rated for 400A and above shall have non-ferrous flanges and hardware.

29.17. Fittings made of steel or malleable iron shall be galvanized.

29.18. Bushing shall be so located on the transformer that full flashover strength will be utilized.

Minimum clearances as required for the BIL shall be realized between live parts and live

parts to earthed structures.

33 | P a g e

29.19. All applicable routine and type tests certificates of the bushings shall be furnished for

approval.

29.20. Bushings shall be supplied with bimetallic/terminal connectors/ clamp suitable for fixing to

bushing terminal and the PURCHASER’S specified conductors. The connectors/clamp

shall be rated to carry the bushing rated current without exceeding a temperature rise of

55° C over an ambient of 40° C. the connector/ clamp shall be designed to be corona free

at the maximum rated line to ground voltage.

29.21. Bushing of identical voltage rating shall be interchangeable.

29.22. Each bushing shall be so coordinated with the transformer insulation that all flashover will

occur outside tank.

30.0 FILTER AND DRAIN VALVES, SAMPLING DEVICES AND AIR RELEASE PLUGS :

30.1. Each Transformer shall be fitted with the following :

30.2. The filter and drain valves as specified.

A drain valve as below shall be fitted to each conservator. For diameter upto 650 mm :

Size of the valve 15 mm : for diameter above 650 mm : Size of the valve 25 mm.

Suitable oil sampling device shall be provided at the top and bottom of the main tank. The

sampling device shall not be fitted on the filter valves specified above.

One 15mm air release plug on the main tank of the Transformer.

30.3. All other valves opening to atmosphere shall be fitted with blank flanges.

Valves shall be of forged carbon steel upto 50 mm size and of gun metal or of cast iron

bodies with gun metal fittings for sizes above 50 mm. They shall be of full way type with

screwed ends and shall be opened by turning counter clock wise when facing the hand

wheel. There shall be no oil leakage when the valves are in closed position.

30.4. Each valve shall be provided with an indicator to show the open and closed position and

shall be provided with facility for padlocking in either open or closed position. All screwed

valves shall be furnished with pipe plugs for protection. Padlocks with duplicate keys shall

be supplied along with the valves.

30.5. All valves except screwed valves shall be provided with flanges having machined faces

drilled to suit the applicable requirements. Oil tight blanking plates shall be provided for

each connection for use when any radiator is detached and for all valves opening to

atmosphere. If any special radiator valve tools are required, the Contractor shall supply

the same.

30.6. Each transformer shall be provided with following valves on the tank so located as to

completely drain the tank.

Two filter valves on diagonally opposite corners, of 50 mm size.

Oil sampling valves not less than 8 mm at top and bottom of main tank

30.7. Valves between radiators and tank.

30.8. Valve prior to and after the Buchholz Relay.

31.0 COOLING PLANT

31.1. General :Radiators shall be so designed as to avoid pockets in which moisture may collect

and shall withstand the pressure tests.

31.2. The radiator tubes / fins shall be seamless, made of mild steel having as minimum wall

thickness of approx. 1.2mm and a clean bright internal surface free from dust and scale.

They shall be suitably braced to protect them from mechanical shocks, normally met in

transportation and to damp the modes of vibration transmitted by the active part of the

transformer in service.

31.3. Each cooler unit shall have a lifting eye.

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31.4. Radiator Valves: The butterfly or similar metal valves shall be provided for isolating

detachable radiator assembly.

31.5. One cock each at the bottom of radiator stack shall be provided for draining oil from

radiator stacks.

31.6. Air release plug each at the top of radiator stack shall be provided for release of air from

radiator stack.

31.7. Removable blanking plates shall be provided to permit the blanking off the main oil

Connection of each cooler.

31.8. Radiator fixing bands in top & bottom of radiators are to be provided to minimise the

vibration of the same.

32.0 LIFTING AND HAULAGE FACILITY :

32.1. Each tank shall be provided with Lifting lugs suitable for lifting of transformer complete

with oil.

32.2. A minimum of four jacking lugs, in accessible positions to enable the transformer complete

with oil to be raised or lowered using hydraulic or screw jacks .

32.3. The minimum height of the lugs above the base shall be as follows

(a) for transformers up to and including 10 tones weight-300mm

(b) for Transformers above 10 tones weight – 500 mm

32.4. Suitable haulage holes shall be provided.

33.0 INSULATING OIL :

33.1. The Transformer and all associated oil filled Equipment shall be supplied complete with

insulating new oil required for first filling including 10% extra oil for future use during

commissioning. The Transformer tank shall be dispatched completely filled with oil and the

balance oil shall be supplied in non returnable sealed drums along with the Transformers.

33.2. The Insulating oil shall conform to the requirement of IS:335 or equivalent international

specifications.

34.0 PRESSURE RELIEF DEVICE :

34.1. Pressure relief device shall be provided of sufficient sizes for rapid release of pressure

that may by generated within the tank, and which might result in damage to the

equipment. The device shall operate at a static pressure of less than the hydraulic test

pressure for transformer tank. Means shall be provided to prevent ingress of rain.

34.2. It shall be mounted on the cover of the main tank and shall be designed to prevent gas

accumulation.

34.3. Spring loaded setting type Pressure Relief Valve having suitable opening Port hole

according to the capacity of the transformers should be provided.

34.4. The pressure relief valve should have provision of visual indication for opening of the valve

and also Contract/Micro Switch arrangement for alarm/Tripping Function.

35.0 AXLES AND WHEELS :

35.1. The Transformer shall be provided with flanged bi-directional wheels as mentioned below :

Flanged wheel suitable for use on a 1435 mm / 1676 mm guage track.

.

35.2. The wheels shall be suitable for being turned through an angle of 90 Deg. and locked in

that position when the tank is jacked up.

35.3. All wheels shall be detachable and shall be made of Cast Iron or Steel. Suitable locking

arrangement shall be provided to prevent the accidental movement of the transformer.

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36.0 CLEANING & PAINTING

36.1. Before painting or filling with oil all galvanised parts shall be completely cleaned and free

from rust, scale and grease and all external surface cavities on castings shall be filled by

metal deposition.

36.2. The interior of all transformer tanks and other oil filled chambers and internal structural

steel work shall be thoroughly cleaned of all scale and rust by sand blasting or other

approved method. These surfaces shall be painted with hot oil resisting varnish or paint.

Unexposed welds need not be painted.

36.3. Except for nuts, bolts and washers, which may have to be removed for maintenance

purposes, all external surfaces shall receive a minimum of three coats of paint.

36.4. The primary coat shall be applied immediately after cleaning. The second coat shall be of

oil paint of weather resisting nature and preferably of a shade or colour easily

distinguishable from the primary and final coasts shall be applied after the primary coats

have been touched up where necessary.

36.5. The final coat shall be of glossy oil and weather resisting non fading paint of Dark

Admiralty Grey shade no. 632 of IS:5.

36.6. Primer paint shall be ready made zinc chrome as per IS: 104: Intermediate and final coats

of paint shall be as per IS: 2932 or equivalent international specifications.

36.7. All interior surfaces of mechanism chambers and kiosks except those which have received

anti-corrosion treatment shall receive three coats of paint applied to the thoroughly

cleaned metal surface as per procedure mentioned above. The final coat shall be of a light

coloured anti-condensation mixture.

36.8. Any damage to paint work incurred during delivery shall be made good by the

manufacturer by thoroughly cleaning the damage portion and applying the full number of

coats of paint that had been applied before the damage was caused.

37.0 EARTHING TERMINAL

37.1. Two earthing terminals capable of carrying the full amount of lower voltage short circuit

current of transformer continuously for a period of 5 Second Provision shall be made at

positions close to each of the bottom two corners of the tank for bolting the earthing

terminals to the tank structure to suit local condition.

38.0 TEMPERATURE INDICATING DEVICE:

38.1. Oil temperature indicator with two electrical contacts for alarm and trip purposes, shall

be provided with anti vibration mounting. The oil temperature indicator shall be housed in

the marshalling box.

38.2. The winding temperature indicator with two electrical contacts for alarm & trip purposes

shall be provided with anti vibration mounting. The winding temperature indicator shall be

housed in the marshalling Box.

38.3. The Oil and Winding temperature indicator should be of renowned make preferably of

“Perfect Control” or “Precimeasure”. The scale on the dial of the thermometer should be

0°C to 150°C. The angular displacement of thermometer should be 270 Deg.

38.4. The signaling contact of WTI & OTI shall be set to operate at the following temperature:

OIL : Alarm-85 °C, Trip – 95 ° C

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WINDING : Alarm-100 °C, Trip – 110 °C

38.5. The tripping contacts of indicator shall be adjustable to close the winding temperature

indicator between 60 Deg.C and 120 Deg.C. The alarm contacts of indicator shall be

adjustable to close between 50 deg.C & 100 Deg.C.

38.6. All contacts shall be adjustable on a scale and shall be accessible on removal of the

cover. The Temperature indicators shall be so designed that it shall be possible to check

the operation of contacts and associated Equipments.

38.7. For measuring winding temperature a heater coil fed from a C.T. has to be provided on

the pocket for winding temperature indicator bulb. The connection from C.T. to heater

should be through a link arrangement on the tank cover suitably housed in a weather proof

box so that C.T. current and heater coil resistance can be checked. WTI C.T. secondary

should be of 5 Amps, rating.

38.8. Accuracy class of both OTI and WTI shall be ±1% or better.

39.0 MARSHALLING BOX

39.1. A sheet steel 3.15mm thick vermin proof, well ventilated and weather proof

marshalling box of a suitable construction shall be provided for the transformer

ancillary apparatus. The box shall have domed or sloping roofs and the interior &

exterior painting shall be in accordance with painting clause specified. The degree of

protection shall be IP-55.

39.2. The marshalling box shall accommodate.

Winding and oil temperature indicator.

Terminal Blocks and gland plates for incoming and outgoing Cables.

One space heater operated by 220 V.A.C. Aux. Supply, Cubicle illuminating lamp with door

switch.

39.3. All incoming cables shall enter the kiosk from the bottom and the gland plate shall

not be less than 450 mm from the base of the box. The gland plate and associated

compartment shall be sealed in suitable manner to prevent the ingress from the

cable trench

39.4. All the above equipment shall be mounted on panels and back of panel wiring shall

be used for Interconnection. The temperature indicators shall be so mounted that the

dials are visible by standing at ground level.

39.5. Door of the compartment shall be provided with glass window of adequate size.

Ventilation louvers shall be provided.

39.6. The schematic diagram of the circuitry inside the marshalling box be prepared and

fixed inside the door

40.0 GAS AND OIL ACATUATED RELAYS

40.1. Each transformer shall be provided with gas and oil actuated Relay (Buchholtz Relay)

equipment conforming to IS:3637 or equivalent international specifications, double float type

with one set of alarm contacts, one set of trip contacts and a testing pet cock. The contacts

shall be wired with a P.V.C. armoured cable.

40.2. A machined surface shall be provided on the top of Relay to facilitate the setting of Relay

and to check the mounting angle in the pipe and cross level of the Relay.

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40.3. The pipe work shall be so arranged that all gas arising from the Transformer shall pass into

the gas and oil actuated Relay. The oil circuit through the Relay shall not form a delivery

path in parallel with any circulating oil pipe.

41.0 RATING DIAGRAM AND PROPERTY PLATES :

41.1. The following plates shall be fixed to the transformer tank at a suitable height so that the

particulars could be read by standing at ground level.

41.2. A rating plate bearing the data specified in the relevant clauses of IS:2026 including figures

of temperature rise of oil and winding and high voltage test values. that the equipment

belongs to APDCL with reference of purchase order is also to be indicated.

41.3. A diagram plate showing the internal numbering of taps, tapping switch connection of

windings and also the voltages vector relationship in accordance with IS:2026 or equivalent

international specifications and in addition a plan view of the transformer giving the correct

physical relationship of the terminals. No load voltage shall be indicated for each tap. Details

of C.T particulars w.r.o phase, Neutral &WTI CT.

42.0 CENTRE OF GRAVITY :

42.1. The centre of gravity of the assembled transformer shall be low and as near the vertical

centre line as possible. The transformer shall be stable with or without oil.

42.2. If the centre of gravity is eccentric relative to track either with or without oil, its location shall

be shown on the outline drawing.

43.0 FOUNDATION :

43.1. The tenderer shall furnish foundation plan of the transformer showing the fixing arrangement

of the transformer so that the purchase may be able to finalise the foundation drawings.

44.0 TEST AND INSPECTION :

44.1. Routine Tests :

44.2. All transformers shall be subjected to the following routine tests at the manufacturer’s

works. The tests shall be carried out in accordance with the details specified in IS:2026 or

equivalent international specifications.

i. Measurement of winding resistance.

ii. Measurement of turns ratio for all sets windings on each tap

iii. Polarity and phase vector relationship.

iv. Measurement of no load loss and no load current.

v. Measurement of impedance voltage at normal , maximum and

minmum tap

vi. Measurement of insulation resistance between windings and between windings and earth

vii. Measurement of load loss

viii. Induced over voltage withstand test

ix. Separate source voltage withstand test

x. Oil Leakage gas collection, oil surge and voltage test on gas and oil actuated relay for on

load tap changer

38 | P a g e

xi. Magnetic balance test

xii. Testing of Phase & Neutral C.T., as applicable, in accordance with provisions in the

relevant I.S

xiii. Oil leakage test of tnansformer tanks at a pressure equals to the normal pressure plus 35

KN/ sq.M measured at the base of tank

.

44.3. Type Test

44.4. In addition to routine Tests mentioned above the transformer shall be subjected to all

kinds of Type and Acceptance Test in accordance with Relevant I.S. (IS:2026) or

equivalent international specifications with latest amendment if any.

44.5. Bidder should submit Type Test report from NABL/Govt. approved Laboratories

along with their offer having identical technical parameters as that of the tendered

item failing which their offer may not be technically accepted.

44.6. However, if it is found that the bidder has submitted Type tests Report but those

have not been conducted on identical Design of equipment/material as per

specification of APDCL, the same may be accepted subject to the following

conditions: APDCL at his discretion request the successful bidders to conduct

Type Tests on identical design as per specification

44.7. . Such Type tests/special tests, if required to be carried out at NABL/Govt. approved

Laboratories in presence of APDCL engineers for which no extra cost shall be

charged to the APDCL.

44.8. However, the bidders who have not submitted such Type Test/Dynamic Short Circuit Test

report but if their offer is considered technically acceptable by the purchasers on the basis

of other credentials, they will have to carry out such tests at NABL/Govt. approved

Laboratories in presence of APDCL engineers before effecting physical delivery against

Purchase Order for which no extra cost shall be charged to the APDCL. Routine Test

have to be carried out in presence of APDCL engineers before carrying out type

test.

45.0 INSPECTION AND TESTING

(A) STAGE INSPECTION

Stage inspections of raw materials i.e. Tank, Core, Winding, Bushing, Insulating Materials etc. will

be carried out in preassembled condition and final inspection will be carried out on finished product.

Out of the whole lot of respective capacity, one

Transformer will be dissembled for verification of design parameter during final inspection.

a) Tank and Conservator

(i). Inspection of major weld.

(ii). Crack detection of major strength weld seams by dye penetration test.

(iii). Check correct dimensions between wheels, demonstrate turning of wheels, through

90o and further dimensional check

(iv). Leakage test of the conservator.

(v). Measurement of film thickness of :

Oil insoluble varnish.

Zinc chromate paint.

39 | P a g e

Finished coat.

(vi). Tank pressure test

(vii). Vacuum test

b) Core

(i). Sample testing of core materials for checking specific loss properties,

magnetisation characteristics and thickness.

(ii). Check on the quality of varnish if used on the stampings.

(iii). Check on the amount of burrs.

(iv). Visual and dimensional check during assembly stage.

(v). Check on completed core for measurement of iron loss.

(vi). Visual and dimensional checks for straightness and roundness of core, thickness of

limbs and suitability of clamps.

(vii). High voltage test (2 kV for one minute) between core and clamps.

c) Insulating Material

(i). Sample check for physical properties of materials.

(ii). Check for dielectric strength

(iii). Check for the reaction of hot oil on insulating materials.

d) Winding

(i). Sample check on winding conductor for mechanical and electrical conductivity.

(ii). Visual and dimensional checks on conductor for scratches, dentmark etc.

(iii). Sample check on insulating paper for PH value, electric strength.

(iv). Check for the bonding of the insulating paper with conductor.

(v). Check for the reaction of hot oil and insulating paper.

(vi). Check and ensure that physical condition of all materials taken for windings is

satisfactory and free of dust.

(vii). Check for brazed joints wherever applicable.

(viii). Check for absence of short circuit between parallel strands.

e) Checks Before Drying Process

(i). Check condition of insulation on the conductor and between the windings.

(ii). Check insulation distance between high voltage connections, between high voltage

connection cables and earth and other live parts.

(iii). Check insulating distances between low voltage connections and earth and other

parts.

(iv). Insulating test for core earthing.

f) Checks During Drying Process

(i). Measurement and recording of temperature and drying time during vacuum

treatment.

(ii). Check for completeness of drying.

g) Assembled Transformer

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(i). Check completed transformer against approved outline drawing, provision for all

fittings, finish level etc.

(ii). Jacking test on the assembled Transformer.

h) Oil

All standard test in accordance with IS: 335 shall be carried out on Transformer oil sample

before filling in the transformer.

i) Test Reports for bought out items

The contractor shall submit the test reports for all bought out/sub contracted items for

approval. All auxiliary equipment shall be tested as per the relevant IS & IEC. Test

certificates shall be submitted for bought out items.

(i). Bucholz relay

(ii). Winding temperature indicators.

(iii). Oil temperature indicators.

(iv). Bushings

(v). Marshalling box

(vi). Air Cell

(vii). Thermosyphon filter

(viii). Off Load Tap changer

(ix). Any other item required to complete the works.

(B) Final Inspection: During final inspection all routine tests mentioned in clause 44.2 shall be

carried out at the factory of the manufacturer in presence of the Inspecting

officer of APDCL

Temperature rise test: temperature rise test in any one of the transformer of each lot is to be

performed in presence of the Inspecting officer of APDCL

46.0 Porcelain, bushings, control devices, insulating oil and other associated equipment shall be tested by

the contractor in accordance with relevant IS. If such equipment are purchased by the contractor on a

sub-contract, he shall have them tested to comply with these requirements

46.1. Inspection and testing as already mentioned the equipment shall be subjected to routine

and other acceptance tests as per provisions in the relevant I.S.

46.2. The APDCL reserves the right to send its Engineers if so desires to witness manufacturing

process and to reject either raw materials or finished products found to be not complying

with the requirement of the specification and also shall have the right to select any/all

equipment from the lot offered for tests.

46.3. The manufacturer shall give at least (21) twenty one days’ advance notice regarding

readiness of such inspection and testing and shall submit six sets of the works test

certificates of the materials/equipment offered for inspection and testing indicating

probable date of inspection and testing.

46.4. The manufacturer shall arrange all possible facilities for such inspection and testing at any

time during the course of manufacture free of cost.

47.0 TEST CERTIFICATE

Five copies of the approved Test Certificates as mentioned above are to be furnished to

the APDCL before dispatch of the equipment.

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48.0 DRAWINGS AND MANUALS TO BE SUBMITTED BY SUCCESSFUL BIDDER

48.1. The bidder shall furnish, within fifteen days after issuing of letters Award, six copies each

of the following drawings/documents incorporating name of project and transformer rating

for approval.

i. Detailed overall general arrangement drawing showing front and side elevations and

plan of the transformer and all accessories including radiators and external features with

details of dimension, spacing of wheels in either direction of motion, net weights and

shipping weights, crane lift for untanking, size of lugs and eyes, bushing lifting

dimensions, clearances between HV and LV terminals and ground, quantity of insulating

oil etc.

ii. Foundation plan showing loading on each wheel and jacking points with respect to

centre line of transformer.

iii. GA drawing/details of bushing and terminal connectors.

iv. Name plate drawing with terminal marking and connection diagrams.

v. Wheel locking arrangement drawing.

vi. Transportation dimension drawings.

vii. Interconnection diagrams.

viii. Over fluxing withstand time characteristics of transformer.

ix. GA drawing of marshalling box.

x. Control scheme/wiring diagram of marshalling box.

xi. Technical leaflets of major components and fittings.

xii. As built drawing of schematic, wiring diagrams etc.

xiii. Setting of oil temperature indicator, winding temperature indicator.

xiv. Completed technical data sheets.

xv. HV/LV conductor bushing.

xvi. Bushing assembly.

xvii. Bi-metallic connector for connection to “Wolf”/PANTHER ACSR/AAAC conductor

xviii. Radiator type assembly.

48.2. All drawings/documents, technical data sheets and test certificates/results/calculations

shall be furnished.

48.3. Any approval given to the detailed drawings by the purchaser shall not relieve the

contractor of the responsibility for correctness of the drawing and in the manufacture

of the equipment. The approval given by the purchaser shall be general with overall

responsibility with contractor.

48.4. Installation, operation and maintenance manual of transformer, associated equipment

like buchholtz Relay, temperature indicators, oil level indicator etc. The manual shall

clearly indicate the installation method, check-ups and tests to be carried out before

and after commissioning of the transformer.

42 | P a g e

48.5. One copy of manual, set of approved drawings shall be submitted to the

CGM(PPD)/APDCL before dispatch of the Transformer.

48.6. In addition one set of approved drawing, manual for transformer shall be send to the

respective consignee officer in water proof folder at the time of delivery of the

transformer.

49.0 GUARANTEED TECHNICAL PARTICULARS

Bidder shall furnish guaranteed technical particulars of equipment offered as per Schedule ‘B’ To

be provided along with final NIT specification),

50.0 ACCESSORIES

All accessories as specified in the schedule A are to be provided. Any other part necessary for

smooth operation of the transformer if omitted it is the manufacturers responsibility to include the

same.

51.0 SPARE PARTS:

The bidder are to quote for each item of recommended spare parts for each transformer as per

price bidding schedule. However quantity of spares shall be procured as per actual requirement.

43 | P a g e

SCHEDULE – A

FITTINGS & ACCESSORIES

The following fittings and accessories shall be supplied with each Transformer :

1. Outdoor type bushing – HV-3 Nos. and LV-4 Nos.

2. Conservator with aircell and supporting bracket or structure as the case may be.

3. Isolating valve for conservator in between conservator and Buchholtz Relay and in

between Buchholtz relay and main tank..

4. Conservator valves for driving out air between air cell & wall of conservator & connection

to breather.

5. Conservator drain valve.

6. Dial type oil level indicator complete with alarm contact.

7. Silica gel breather with oil seal and connecting pipe. The breather shall be accessible for

inspection from ground.

8. Spring loaded setting type pressure relief Valve having suitable opening Port. Hole &

provision of visual indication for opening of the valve & Alarm/Trip contact arrangement.

9. Access/inspection holes with bolted cover for access to inner ends of bushing.

10. Cover lifting eyes.

11. Lifting eyes for core frame with windings.

12. Tap changing arrangement with hand wheel for Off-Load tap-

13. Air release plugs on top of cover and pressure equalizer pipe for bushing turret.

14. Upper filter valve and bottom filter valve.

15. Drain valve.

16. Top and bottom oil sampling devices. Provision for oil sample collection during process of

filtration should be made.

17. Lifting lugs.

18. Jacking pads with handling holes at four corners.

19. Transport lugs.

20. Under carriage base channel.

21. Tank earthing terminals – 2 Nos.

22. Buchholtz relay double float type with one set of alarm contacts, one set of trip contacts

and testing pet cock. The contacts should be wired with a PVC armoured cable

23. Dial thermometer for winding temperature with alarm contacts and Trip contacts.

24. Dial thermometer for oil temperature with alarm contacts and Trip Contacts.

25. An additional pocket for inserting thermometer for oil temperature indication.

26. Weather proof control cabinet for marshalling terminal connections from protective and

indicative devices. The cabinet shall be provided with incandescent filament lighting,

heater and plugs etc.

27. Rating plate, as per I.S.S

28. Diagram Plate :

29. Property label

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SCHEDULE – B

MANDATORY SPARE PARTS:

The mandatory spare parts shall include the following.

(i) Bushings:

a. High Voltage - 1 No.

b. Low Voltage - 1 No.

c. Neutral Bushing - 1 No.

(ii) Complete set of gaskets for all - 1 Set

openings on the tank requiring gasket.

(iii) Magnetic oil level gauge with low oil - 1 No.

level alarm contacts.

(iv) Oil temperature indicator with alarm - 1 No.

and trip contacts and maximum reading pointer.

(v) Winding temperature indicator with alarm and trip - 1 No.

contacts and maximum reading pointer

(vi) Set of all types of valves comprising one in each type. - 1 Set

(vii) Silicagel breather - 1 No.

(viii) Buchholz Relay - 1 No.

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Guaranteed Technical Particulars

GUARANTEED TECHNICAL PARTICULARS OF 33kV /11kV TRANSFORMER

(To be filled by bidder for 5 MVA & 10 MVA separately)

Sl.

No

Description

1 Name of the Manufacturer

2 Installation [indoor/outdoor]

3 Reference standards

4 Continuous Ratings

a) Type of cooling

b) Rating [MVA]

c Rated voltage

i HV [KV rms.]

ii LV [KV-rms.]

d Highest system voltage

i HV [KV rms.]

ii LV [KV-rms.]

e Rated frequency with ±% variation

f Number of phases

g Current at rated full load and on

principal tap

i HV [Amps]

ii LV [Amps]

5 Connections

HV

LV

6 Connection symbol and vector group

7 Temperature rise

a Temperature rise of oil above reference

peak ambient temperature i.e.50 °C [by

thermometer] [°C]

b Temperature rise of winding above reference peak ambient temperature [by resistance method][°C]

c Temperature gradients between windings & oil.

d Limit of Hot spot temperature for which the Transformer is designed [°C]

8 Type of OFF load tap changing switch

9 Tapping on windings for

i Constant flux/variable flux/combined regulation

ii Tapping provided at

iii Number of steps

iv Range of tapping for variation [+ percent to - percent]

10 i No load loss at rated voltage and frequency at principal tap [KW]

ii No load loss at the voltage corresponding to highest tap [KW]

11 Load loss at rated output, rated frequency, ONAN

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corrected for 75 °C winding temperature at:- [Copper loss ]

i Principal tap [In KW]

ii Highest tap [In KW]

iii Lowest tap [In KW]

12 Positive sequence impedance on rated MVA base at rated current and frequency at 75°Centigrade winding temperature at

i Principal tap [%]

ii Highest tap [%]

iii Lowest tap [%]

13 Zero sequence impedance at reference temperature of 75°C at principal tap [%]

14 % reactance at rated MVA base at rated current and rated frequency at

i Principal tap [%]

ii Highest tap [%]

iii Lowest tap [%]

15 % resistance at rated MVA base at rated current and rated frequency at

i Principal tap [%]

ii Highest tap [%]

iii Lowest tap [%]

16 % Impedance at rated MVA base at rated current and rated frequency at

i Principal tap [%]

ii Highest tap [%]

iii Lowest tap [%]

17 a Polarization index i.e. ratio of Megger values at 600 secs to 60 secs, (H.V. to E, L.V. to E, & H.V.to L.V.)

In Between PI

H.V – E

L.V. – E

H.V – L.V.

b Regulation at full load and 75°C winding temperature expressed as a percentage of normal voltage

i At unity power factor [%]

ii At 0.8 power factor [lagging][%]

18 Efficiency at 75°C winding temperature as derived from guaranteed loss figures and at

Unity power Factor

0.8 Power factor

a At full load [%]

b At ¾ load [%]

c At ½ load [%]

19 i Maximum efficiency [%]

ii Load at which maximum efficiency occurs[% of full load]

20 Short time thermal rating of

i HV winding in KA and duration in seconds

ii LV winding in KA and duration in seconds

21 Permissible over loading:-

a HV winding

b LV winding

22 Terminal arrangement

a High voltage [HV]

b Low voltage (LV)

c Neutral

47 | P a g e

23 Insulating and cooling medium

24 Test voltage HV LV

i Lightning impulse withstand test voltage [KVP]

ii Power frequency withstand test voltage [dry and wet][for 1 minute] [KV-rms.]

25 Noise level when energized at normal voltage, frequency without load.

26 External short circuit withstand capacity [MVA] and duration [seconds]

27 Over-fluxing withstand capability of the Transformer

28 DETAILS OF CORE

a Type of core construction

b Type of corner joints of the core

c Maximum flux density at

i Rated voltage [33/11 KV] & rated frequency 50 Hz][in Tesla]

ii Highest system voltage [36/12 KV] and lowest system frequency [48.5Hz.][in Tesla]

d No load current, no load loss and no load power factor at normal ratio and frequency [Amp/KW/p.f.]

i 10 percent of rated voltage

ii 25 percent of rated voltage

iii 50 percent of rated voltage

iv 85 percent of rated voltage

v 100 percent of rated voltage

vi 105 percent of rated voltage

vii 110 percent of rated voltage

viii 112.5 percent of rated voltage

ix 115 percent of rated voltage

x 120 percent of rated voltage

xi 121 percent of rated voltage

xii 125 percent of rated voltage

e Core laminations:-

i Material of core lamination [M4 /HIB]

ii Grade of core laminations

iii Thickness of core lamination [mm]

iv Specific loss [watt/Kg.] at rated voltage and rated frequency

v Specific loss [watt/Kg.] at highest system voltage and lowest system frequency

vi Whether specific core loss graph [flux density vs. watt/Kg. submitted

vii VA/Kg at rated voltage and rated frequency

viii VA/Kg. at highest system voltage and lowest system frequency

ix Whether VA/Kg. Vs. flux density graph Submitted

x Insulation of core laminations

f CORE ASSEMBLY:-

i Core diameter [mm]

ii Core window height [mm]

iii Core leg centre [mm]

48 | P a g e

iv Gross core cross-sectional area [m²]

v Whether details of core widths, stacks and calculation furnished as per enclosed annexure

vi Distance between centers [mm]

vii Total height of core [mm]

viii 1) Details of core belting.

2) Material, grade & type

3) Width

4) Thickness

5) Fixing method

ix Details of top end frame

x Details of Bottom end frame

xi Details of clamp plate [Material, thickness, Insulation]

xii Total core weight [kg]

xiii Core loss basing on core loss graph at operating flux density [rated voltage and rated frequency] [kw]

xiv Core stacking factor

xv Net core area Sq. m.

xvi Margin towards corner joints, cross fluxing etc [kw]

xvii Total core loss at rated voltage and rated frequency [xiii+xvii] [kw]

xviii Dielectric loss at rated voltage and rated frequency [KW]

xix No load loss at rated voltage and rated frequency [xviii+xix] [KW]

g Describe location/method of core grounding

h Details of oil ducts in core

i Peak value of magnetizing Inrush current (% of HV rated current).

29 DETAILS OF WINDINGS. HV Regulating LV

a Type of winding

b Material of the winding conductor

c Maximum current density of windings [at rated current] and conductor area

Conductor area [cm²]

Current density [A/cm²]

i HV

ii Regulating

iii L.V.

d Whether HV windings are interleaved

e Whether windings are pre-shrunk?

f Whether adjustable coil clamps are provided for H.V. and L.V. windings?

g Whether steel rings are used for the windings? If so, whether these are split?

h Whether electrostatic shields are provided to obtain uniform voltage distribution in the windings?

i Winding Insulation. Type & class Graded or Ungraded

i H.V. & Regulating

ii LV Winding

j Insulating material used for

i H.V.& Regulating winding

ii L.V Winding

49 | P a g e

iii Tapping connection

k Insulating material used between

i H.V. and L.V. winding

ii H.V. and Regulating winding

iii Core and L.V winding

iv L.V. Winding and core

v Regulating Winding and core

vi H.V. winding and core

vii H.V. to H.V. winding [between phases]

l Type of axial coil supports

i H.V. winding

ii Regulating winding

iii LV winding

m Type of radial coil supports

i H.V. winding

ii Regulating winding

ii LV winding

n Maximum allowable torque on coil clamping HV Regulating LV bolts

o Bare conductor size (mm).

p Insulated conductor size (mm).

q No. of conductors in parallel (Nos.).

r No. of turns/phase

s No. of discs/phase

t No. of turns/disc

u Gap between discs. (mm).

v Inside diameter (mm).

w Outside diameter (mm).

x Axial height after shrinkage (mm).

y D.C.RESISTANCE

i L.V winding at 75 ° C (Ohms).

ii HV winding and Regulating winding at normal tap at 75° C (Ohms).

iii HV winding and Regulating winding at highest tap at 75° C (Ohms).

iv HV winding and regulating winding at lowest tap. (Ohms).

v Total I²R losses at 75 ° C. for normal tap. (KW).

vi Total I²R losses at 75 ° C. for highest tap. (KW)

vii Total I²R losses at 75 ° C for lowest tap.(KW).

viii Stray losses including eddy current losses in winding at 75°C (KW).

a Normal tap position

b Highest tap position

c Lowest tap position.

d Any special measures taken to reduce eddy current losses and stray losses, mention in details

x Load losses at 75°C [I²R + stray].

a Normal tap position [KW].

b Highest tap position [KW].

c Lowest tap position [KW].

z Details of special arrangement provided to improve surge voltage distribution in the windings

50 | P a g e

30 BUSHINGS. HV LV Neutral

a Make and type

i Rated voltage class [KV-rms.]

ii Rated current [Amps.]

b Lightning Impulse withstand test voltage [1.2/50 micro second][KVP]

c Power frequency withstand test voltage

i Wet for 1 minute [KV-rms]

ii Dry for 1 minute [KV-rms]

d Power frequency visible corona discharge voltage [KV-rms.]

e Minimum creepage distance in mm

f Phase to earth clearance in air of live parts at the top of bushings

31

Minimum clearance [mm]

In Oil Out of Oil

Between Windings

Phase to

Ground

Between windings

Phase to

Ground

HV

LV

32 Weight [Tolerance + 5%] [Approximate value is not allowed]

a Core [Kg.]

b Core with clamping [Kg.]

c H.V. winding insulated conductor [Kg.]

d Regulating winding insulated conductor [Kg.]

e L.V.winding insulated conductor [Kg.]

f Coils with insulation [Kg.]

g Core and winding [Kg]

h Oil required for first filling [Liter/Kg.]

i Tank and fittings with accessories [Kg.]

j Untanking weight [Kg.]

k Total weight with oil and fittings [kg.]

33 DETAILS OF TANK

a Material for Transformer tank

b Type of tank

c Thickness of sheet [No approximate value to be mentioned]

i Sides [mm]

ii Bottom [mm]

iii Cover [mm]

iv Radiators [mm]

d Inside dimensions of main tank [No approximation in dimensions to be used]

i Length [mm]

ii Breadth [mm]

iii Height [mm]

e Outside dimensions of main tank [No approximation in dimensions to be used]

i Length [mm]

ii Breadth [mm]

iii Height [mm]

f Thickness of spray galvanisation of tank bottom.

g Vacuum recommended for hot oil

51 | P a g e

circulation [torr]

h Vacuum to be maintained during oil filling in Transformer tank [torr]

i Vacuum to which the tank can be subjected without distortion [torr]

j No. of bi-directional wheels provided

k Track gauge required for the wheels

i Transverse axis

ii Longitudinal axis

l Type and make of pressure relief device and minimum pressure at which it operates [Kpa]

34 CONSERVATOR

a Total volume [Liters]

b Volume between the highest and lowest visible oil levels [Litres]

c Whether flexi separator provided

35 OIL QUALITY

a Governing standard

b Density in gms/cu-cm

c Kinematics viscosity in CST

d Inter facial tension at 27°C in N/m

e Flash point in °C

f Pour point in °C

g Acidity [neutralization value] in mg of KOH/gm

h Corrosive sulfur in %

i Electric strength [breakdown voltage]

i As received [KV-rms.]

ii After treatment [KV-rms.]

j Dielectric dissipation factor [tan delta] at 90°C

k Saponification value in mg of KOH/gm

l Water content in ppm

m Specific resistance

i At 90°C [ohm-cm]

ii At 27 °C [ohm-cm]

N- dm analysis

CA%

CM%

CP%

o Oxidation stability

i Neutralization value after oxidation

ii Total sludge after oxidation

p Characteristic of oil after ageing test as per ASTMD-1934

i Specific resistance at

27°C [ohm-cms]

90°C [ohm-cms]

ii Tan delta

iii Sludge content

iv Neutralization number

v Details of oil preserving equipment offered

36 RADIATORS

a Overall dimensions lxbxh [mm]

b Total weight with oil [Kg.]

c Total weight without oil [Kg.]

52 | P a g e

d Thickness of radiator tube [mm]

e Types of mounting

f Vacuum withstand capability

g Total radiating surface in sq.m

h Type and make of material used for the radiators

i Total number of radiators for Transformer and dimensions of tubes

j Thickness of hot dip galvanization of radiators

37 GAS AND OIL OPERATED RELAY

a Make

b Type

c Size

d Whether supervisory alarm and trip contacts provided and their sizes and Nos

38 TEMPERATURE INDICATORS Oil Temp Indicator

Winding Temp Indicator

a Make and type

b Permissible setting ranges for alarm and trip

c Number of contacts

d Current rating of each contact

e Whether supervisory alarm contacts provided?

f Size [lxbxd]

g Nos.

h Ratio and type of CT used for winding temperature indicators.

39 APPROXIMATE OVERALL DIMENSIONS OF TRANSFORMER INCLUDING COOLING SYSTEM, TAP CHANGING GEAR ETC.

Length [mm]

Breadth [mm]

Height [mm]

40

a Minimum clearance height for lifting core and winding from tank [mm]

b Minimum clearance height for lifting tank cover [mm]

41 SHIPPING DETAILS

a Approximate weight of heaviest package [Kg.]

b Approximate dimensions of largest Package [Kg.]

42 Transformers will be transported with oil/gas.

43 MARSHALLING KIOSK

a Make and type

b Details of apparatus proposed to be housed in the kiosk

44 Details of anti-earthquake device provided, if any

45 Separate conservator and Buchholz relay provided

46 TAP CHANGING EQUIPMENT [These details refer to the basic rating of O.L.

53 | P a g e

T.C. as guaranteed by OLTC manufacturers]

a Make

b Type

c Power flow [Uni.-directional/bi - directional/restricted bi-directional]

d Rated voltage to earth [KV]

e Rated current [Amps.]

f Step voltage [volts]

g Number of steps

h Control - manual/local- electrical/remoteelectrical

i Voltage control [Automatic/Non -automatic]

j Line drop compensation provided/not provided

k Parallel operation

l Protective devices

m Auxiliary supply details

n Time for complete tap change [one step][Sec.]

o Diverter selector switch transient time [cycles]

p Value of maximum short circuit current [Amps]

q Maximum impulse withstand test voltage with 1.2/50 micro seconds full wave between switch assembly and ground [KVP]

r Maximum power frequency test voltage between switch assembly and earth [KV-rms]

s Maximum impulse withstand test voltage with 1.2/50 micro-seconds across the tapping range [KVP]

t Approximate overall dimensions of tap changer [WxBxD] in mm

u Approximate overall weight [Kg.]

v Approximate mass of oil [Kg.]

w Particulars of the OLTC control panel for installation in control room

47 DRIVING MECHANISM BOX

a Make and type

b Details of apparatus proposed to be housed in the box

48 Types of terminal connectors and drawing No

a HV

b LV

49 Details of painting, galvanization conforms to this Specification [Yes/No]

50 Type of oil level indicator and whether Supervisory alarm contact for low oil level provided [Yes/No]

51 Type and size of thermostat to be used

52 No. of breathers provided [Nos.]

53 Type of dehydrating agent used for breathers

54 Valve sizes and numbers

a Drain valves- mm-Nos

b Filter valves- mm-Nos

54 | P a g e

c Sampling valves- mm-Nos

d Radiator valves- mm-Nos

e Other valves- mm-Nos

55 a Type and make of PRV

b No. of each type of devices per transformer

c Min. pressure at which device operates

56 Please enclose the list of accessories and fittings, being provided on transformer. Please confirm, these are as stipulated in the tender

57 Whether the transformer, covered is fully type tested and if so, whether copies of type test certificates, enclosed with the tender

58 Please confirm that you will guarantee maximum Impedance variation between phases within the limit of 2% only

55 | P a g e

ANNEXURE-III MAXIMUM FLUX DENSITY AND CORE WEIGHTAND NO-LOAD CALCULATION

(To be filled by bidder 5 MVA & 10 MVA separately)

Rating of Transformer : 33/11kV, 5 MVA Power Transformer &

33/ 11 KV , 10 MVA Power Transformer

Name of the bidder: -

Type and Grade of Core: -

Thickness [in mm]:-

Step No Width of steps [mm] Stack thickness [mm] Gross Iron area [mm²]

1 2

3

4

5

6

7

8

9

10

11

12.

13 to ------

E= 4.44 x f x B max. X Ai x N

Where E = L.V. winding phase voltage / phase = 11000/1.732 volts. f = Rated frequency = 50 HZ. B max. = Maximum flux density in Tesla. Ai = Net iron area in sq.m = Gross iron area x stacking factor in sq.m N = Number of L.V.winding turns/phase B max. = E/4.44 x f x Ai x N

Core weight calculation:-

Core dia [in mm] =

Window height [in mm] = Limb center [in mm] =

Weight of core = [3 x window height + 4 x limb centre + 2 x max. width] x Net iron area x Density of

core

NO-LOAD LOSS CALCULATION: Core Weight (Kg) x (watt/kg)

NB: - 1. Specific loss vs. flux density graph for the type of core lamination to be used has to be furnished.

2. VA/Kg. Vs flux density graph for the core lamination to be used has to be furnished.

3. Specific loss Watt /kg curve to be furnished & handling factor to be considered for core loss in

corner limb etc.

4. Any other factor assumed for above calculation to be explained with reasons.

N.B.:- The bidder may use its own method of calculation towards determination of maximum flux

density and weight of the core. But the same shall be supported with proper explanation and

justification.

Place: Date: Signature of Tenderer

with seal of Company.

56 | P a g e

ANNEXURE-IV

DETAILS OF WINDING RESISTANCE AND LOAD LOSS CALCULATIONS (to be submitted by the Bidder for 5MVA & 10 MVA seperately)

Rating of Transformer :1)33/11kV, 5 MVA,Power Transformer

2) 33/11 KV, 10 MVA Power Transformer

1. Name of the Firm

2 Flux density at

i 36/12 KV and 48.5 Hz [Tesla]

ii 33/11 KV & 50.0Hz [Tesla]

3 i Core weight in Kg.

ii Gross core area [mm²]

iii. Stacking factor.

iv. Net core iron area [mm²] [ii x iii]

4 [a] Specific losses [W/Kg.]

i At maximum flux density corresponding to

36/12 KV and 48.5 HZ.

ii At maximum flux density corresponding to

33/11KV and 50Hz.

[b] Volt ampere/Kg

(i) At maximum flux density corresponding to

36/12 KV and 48.5 Hz.

(ii) At maximum flux density corresponding to

33/11 KV and 50 Hz.

5 Calculated/guaranteed Core loss in KW at:-

i Rated voltage and rated frequency

ii Maximum system voltage and lowest system frequency

6 Current density [A/Sq. mm] for

i HV

ii Regulating

iii LV

7 Conductor size [in mm²]

a HV winding

i Bare

ii Insulated

iii No of conductors in parallel

iv Conductor Area

b Regulating winding

i Bare

ii Insulated

iii No of conductors in parallel

iv Conductor area

c. L.V. winding

i. Bare

ii. Insulated.

iii. No. of conductors in parallel.

Iv Conductor area

8. Copper weight

i H.V. windings

ii Regulating windings

iii LV windings

iv For Tap connections, star connection and any

57 | P a g e

other [please specify]

v Total copper weight [i]+[ii]+[iii]+[iv]

9. L.V. winding resistance in ohms at 75°C/Phase.

10. H.V. winding resistance in ohms at 75°C/Phase.

a At normal tap position

b At maximum tap position

c At minimum tap position

11. Stray losses and eddy current losses [in KW] at 75°C

a At normal tap position

b At maximum tap position

c At minimum tap position

12. Resistively of copper to be used for winding

13. I²R loss at 75°C

i At normal tap position [in KW]

ii At maximum tap position [in KW]

iii At minimum tap position [in KW]

14. Calculated guaranteed Load losses [in KW] at

75°C [I²R loss + stray losses]

i At normal tap position

ii At maximum tap position

iii At minimum tap position

15. Computed/guaranteed total load loss in KW at rated

voltage and rated frequency

[Copper loss + Iron loss]

i At normal tap position

ii At maximum tap position

iii At minimum tap position

NB: - 1. Approximate values in weight and losses etc. are not allowed.

2. Tolerance of + 5% in weights may be quoted without any approximation

Place:

Date

Bidder’s name:

Signature, designation, seal

58 | P a g e

Annexure V

DECLARATION

I………………………………………………………………………… authorized representative of M/S

……………………………………………………………………………………tenderer against NIT no

…………………………………………………………..dtd …………………………issued by CGM(PP&D),

APDCL have gone through all section of the bid document of the tender and further bind myself/the said

M/S ………………………………………………………………to abide by the said terms and conditions

I also declare that the information submitted by me on behalf of the tenderer are true and correct

to the best of my knowledge and belief. It is also known to me that any deviation of facts or misleading or

false representations in the forms, statements and attachments submitted will render the bid for outright

rejection from participation in the said tender.

Signature with full name and designation of tenderer with seal

59 | P a g e

SECTION – 7

FORMS OF BID

60 | P a g e

PROFORMA OF BANK GUARANTEE FOR EARNEST MONEY (To be stamped in accordance with Stamp Act)

The non-Judicial stamp paper should be in the name of issuing bank Ref………………………….. Bank Guarantee No…………..

Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam,

In accordance with invitation to bid under your Bid No………………. M/s………………. having

its Registered/ Head Office at ……………..( hereinafter called the ‘Bidder’) wish to participate in the

said Bid or ………………… and you, as a special favour have agreed to accept an irrevocable and

unconditional Bank Guarantee for an amount of ……………….. valid upto……………………. On behalf

of Bidder in lieu of the Earnest Money deposit of the BID required to be made by the bidder, as a

condition precedent for participation in the said Bid.

We, the …………………. Bank at …………………… have our Head Office at…………..( local address)

guarantee and undertake to pay immediately on demand by Assam Power Distribution Company

Limited, the Amount of ……………………………………………

…………………………………………………..( in words & figures) without any reservation, protest,

demur and recourse. Any such demand made by said ‘Owner’ shall be conclusive and

binding on us irrespective of any dispute or difference raised by the Bidder.

The Guarantee shall be irrevocable and shall remain valid up to and including ………….

@....................... if any further extension of this guarantee is required, the same shall be extended

to such required period ( not exceeding one year) on receiving instruction from M/s ………… … ……….

on whose behalf this guarantee is issued.

In witness whereof the Bank, through its authorized office, has set its hand and stamp on this

…………… day of ………………….. 20………… at …………………………

WITNESS

……………………… ……………………. (Signature) ( Signature) …………………….. …………………… (Name) (Name) ……………………. …………………… ( Official Address) (Official Address)

@ This date shall be thirty (30) days after the last date for which the bid is valid.

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PROFORMA OF BANK GUARANTEE FOR CONTRACT PERFORMANCE (To be stamped in accordance with Stamp Act)

Ref………………………….. Bank Guarantee No…………..

Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam,

In consideration of Assam Power Distribution Company Ltd., (herein after referred to as the

‘Owner’ which expression shall unless repugnant to the context or meaning thereof include its

successors, administrators and assigns) having awarded to M/s……………

….……………………….with registered/ Head office at ……………….( hereinafter referred to as “

Contractor” which expression shall unless repugnant to the context or meaning thereof include its

successors, administrators, executors and assigns), a Contract by issue of Owner’s Letter of Intent

No…………… dated……………….. and the same having been acknowledged by the contractor,

resulting in a contract and contractor having agreed to provide a Contract Performance Guarantee for

the faithful performance of the entire Contract equivalent to 10(%) of the said value Contract to the

Owner.

We………………………………………………………………………………………….. (Name & Address)

having its Head Office at …………………( hereinafter referred to as the “ Bank” , which expression

shall, unless repugnant to the context or meaning thereof, include its successors, administrators,

executors and assigns) do hereby guarantee and undertake to pay the owner, on demand any or all

monies payable by the contractor to be extent of ₹ …………………. at any time up to

………………………..**( day/month/year) without any demur, reservation , contest , recourse or protest

and / or without any reference to this contractor. Any such demand made by the owner on the bank

shall be conclusive and binding notwithstanding any difference between the Owner the Contractor or

any dispute pending before any Court, Tribunal, Arbitrator or any other authority. The bank undertakes

not to revoke this guarantee during its currency without previous consent of the owner and further

agrees that the guarantee herein contained shall continue to be enforceable till the owner discharges

this guarantee.

The Owner shall have the fullest liberty without affecting in any way the liability of the Bank under the

guarantee, from time to time to extend the time for performance or the contract by the contractor. The

owner shall have the fullest liberty, without affecting this guarantee, to postpone from time to time the

exercise of any power vested in them or of any right which they might have against the contractor, and

to exercise the same at any time in any matter, and either to enforce or to for bear to enforce any

covenants, contained or implied, in the contract between the owner and the contractor or any other

course or remedy or security available to the owner. The Bank shall not be released to its obligations

under these presents by any exercise by the owner of its liberty with reference to the matters aforesaid

or any of them or by reason of any other act of omission or commission on the part of the owner or any

other indulgences shown by the owner or by any other matter or thing whatsoever which under law

would, but for this provision have the effect of relieving the Bank.

The bank also agrees that the owner at its option shall be entitled to enforce this guarantee against the

Bank as a principal debtor, in the first instance without proceeding against the contractor and not

62 | P a g e

withstanding any security or other guarantee the owner may have in relation to the Contractor’s

liabilities.

Notwithstanding anything contained herein above our liability under this guarantee is restricted to

……………………. And it shall remain in force up to an including …………………….. and shall be

extended from time to time for such period( not exceeding 1 year) as may be desired by

M/s………………………………………………………….on whose behalf this guarantee has been given.

Dated this……………………. Day of ……………………….. 20……………… at………… WITNESS ……………………………. ……………………… (Signature) (Signature) …………………………… …………………….. (Name) (Name) ………………………….. …………………….. (Official address) (Official address) Attorney as per power Of Attorney No………….. Date…………………….. NB: The stamp paper of appropriate value shall be purchased in the name of issuing bank.

63 | P a g e

PROFORMA OF EXTENSION OF BANK GUARANTEE Ref………………………….. Date……………………. To

The Chief General Manager (PP&D) Assam Power Distribution Company Ltd. Bijulee Bhawan, Paltanbazar Guwahati-1

Dear Sirs/ Madam, Sub: Extension of Bank Guarantee No……………….. for Rs…………………. Favouring yourselves ,

expiring on …………………. On account of M/S………………………….. in respect of contract no……………………. dated …………….. ( hereinafter called original Bank Guarantee).

At the request of M/s ……………………… we …………………… bank, branch office at ………………….. and having its Head Office at ………………………. Do hereby extend our liability under the above mentioned Bank Guarantee No………………… dated………………………for a further period of ……………………… ( Years/ Months) from………………….. to expire on………………….. expect as provided above, all other terms and conditions of the original Bank Guarantee No………………………. dated ………………. Shall remain unaltered and binding. Please treat this as an integral part of the original Bank Guarantee to which it would be attached.

Yours faithfully For……………………………… Manager/ Agent/Accountant ………………….. Power of attorney No…………………… Dated…………………………………… SEAL OF BANK

Note: The non-judicial stamp paper of appropriate value shall be purchased in the name of the Bank who has issued the Bank Guarantee.