ASSAM POWER DISTRIBUTION COMPANY LTD.
(CAR)
OFFICE OF THE CHIEF EXECUTIVE OFFICER, TEZPUR ELECTRICAL CIRCLE,
TEZPUR
BIDDING DOCUMENT
FOR
CONSTRUCTION OF 11 KV DEDICATED FEEDER TO
JUDICIAL COMPLEX (TEZPUR)
&
CONSTRUCTION OF 11 KV LINE & 11/0.4KV S/S
INCLUDING AGUMENTATION OF 33/11 KV SUB-STATION
ACCESSORIES (B.CHARIALI)
ON
“TURNKEY” BASIS
SCHEME:
NIT REFERENCE: Short Tender Notice No
CEO/TEC/APDCL/CAR/2013/PS(J)/T&B/112Dtd. 14/11/2013
INDEX
Section – 1 Notice Inviting Tender Page- 1-2
Tender Inviting Proposal Page- 3-8
Tender Proforma – Part –I (Techno Commercial Bid) Page- 9-10
Tender Proforma-Part-II (Price Bid)
BOQ of Diff Packages Page- 11-14
Basic Requirements Page- 15-18
Section – 2 Technical Specifications Page- 19-69
Section – 3 Guaranteed Technical Particulars Page- 70-84
SECTION -1
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page 1
Tender Inviting Proposal TEC/ APDCL(CAR)
ASSAM POWER DISTRIBUTION CO. LTD (CAR)
OFFICE OF THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE,
NOTICE INVITING TENDER NIT No. CEO/TEC/APDCL/CAR/2013/PS(J)/T&B/112 Dtd. 14-11-2013
Sealed two parts Re-Tenders are invited from experienced & financially sound EMPANELLED
Electrical Contractor(s) (individual or joint venture)/Firm(s) of APDCL, having valid electrical license issued by
the competent authority of the Govt. of Assam for below mentioned works under Tezpur Electrical Circle,
APDCL,Tezpur.
Name of the work: As per table below.
Source of fund: Annual Plan 2013-14
Eligibility Criteria: 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.
Cost of Tender Paper for the Package: Rs.3000/-(Rupees Three Thousand) only for Package 1 & Rs.3000/-
(Rupees Three Thousand) Only for Package 2, in the form of ‘A/C Payee Demand Draft/Banker’s Cheque
(non-refundable) duly pledged in favour of “A.M (A/C) O/O THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE,APDCL, CAR, TEZPUR”. Tender paper can be purchased on all
working days w.e.f. 14/11/13 to 21/11/13 from the office of THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE, APDCL, CAR, TEZPUR.
Date of submission of Tenders: Up to 13-00 Hrs. of 30/11/13
Date of opening of Bid: Techno commercial bids will be opened at 13-30 Hrs. of 5/12/13 at the O/O the
CEO, TEC,APDCL, CAR, Tezpur and the price bid will be opened at the o/o the CGM(D), APDCL,
CAR, Bijulee Bhawan, Paltan Bazar, Guwahati-01, on a date to be notified later on.
Package Description of work Completion
period
Earnest
Money
(in Rs.)
Turn over
requirement
(in Lacs)
PS(J)/T/01 CONSTRUCTION OF 11 KV DEDICATED FEEDER
TO JUDICIAL COMPLEX (TEZPUR)
Within
31st March
2014
100000.00 50.00
PS(J)/B/02
CONSTRUCTION OF 11 KV LINE & 11/0.4KV S/S
INCLUDING AGUMENTATION OF 33/11 KV SUB-
STATION ACCESSORIES (B.CHARIALI)
Within
31st March
2014
100000.00 50.00
Earnest money: As shown in the table below. However, in case of SC/ST/OBC bidders, the amount will be
50% of the shown value subject to the condition of submission of cast certificate.
N.B: 11/0.4KV DTR’s, Breakers and Control & Relay Panels will be procured centrally from CGM(D),
APDCL, CAR, Bijulee Bhawan, Paltan Bazar, Guwahati-01. Erection of the same will be executed by the
contractor.
Memo No. CEO/TEC/APDCL/CAR/2013/PS(J)/T&B/112/ Dated 14/11/2013
Copy to :-
1. The P.S to CMD, APDCL, Bijulee Bhawan Paltan Bazar Ghy-1 for favour of information.
2. The Chief General Manager (HQ) APDCL, Bijulee Bhawan Paltan Bazar Ghy-1 for favour of information.
3. The Chief General Manager (D) APDCL, CAR Bijulee Bhawan Paltan Bazar Ghy-1 for favour of information.
4. The Chief General Manager (PP&D) APDCL, Bijulee Bhawan Paltan Bazar Ghy-1 for favour of information.
5. The General Manager, NAZ, APDCL, CAR, Tezpur for favour of information.
6. The AGM (Law), APDCL, Bijulee Bhawan, for information
7. The All AGM’S Under Tezpur Electrical Circle, for information.
Chief Executive Officer
Tezpur Electrical Circle,
APDCL, CAR, TEZPUR
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page 2
Tender Inviting Proposal TEC/ APDCL(CAR)
Note:
1. The work should be carried out as per latest APDCL/REC specification and construction
standard.
2. The tenderers may submit tender(s) against one package or multiple packages.
3. Bids must be submitted in two parts as Techno Commercial and Price bid in two
separate envelope super scribing (a) Tender No. (b) Name of the bidder with full address (c)
Name of the package against which the bid is offered.
4. The bid against each package should be submitted separately in one envelope.
5. Earnest money as stipulated should be submitted with the Techno Commercial bid in
the form of Bank guarantee from any Nationalized or scheduled Bank of India
/NSC/KVP/Term Deposit/FD pledged in favour of “THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE, APDCL, CAR, TEZPUR”. Any tender without
earnest money will be rejected outright.
6. Part-I of the Bid shall consists of information as required and all Technical Bidding
Schedules (GTP), all Price Bidding Schedules with all quantities filled up but without
any Price, etc and Part-II shall consists of Price Bidding Schedules with all quantities
and prices filled up. Details are available in General Instruction to Bidder in Section-2,
Volume-1 of the Bid Document
7. Quoted rate should be inclusive of all taxes and duties and firm. Taxes should be shown
separately
8. Quote rate must valid for minimum 180 days.
9. The tender should be addressed and submitted in the office of THE CHIEF EXECUTIVE
OFFICER, TEZPUR ELECTRICAL CIRCLE, APDCL, CAR, and TEZPUR and will be
opened on the scheduled date & time in presence of the intending tenderers.
10. Only those bidders whose Part-I Bid ie. Techno Commercial bid (Qualification) is found
acceptable shall be considered for opening of Price Bid. The date and time of opening of Part-
II Bid (Price) shall be communicated to those bidders whose bids are qualified for opening.
11. The Company reserves the right to accept or reject any tender in part or in full or spilt the
work of any package without showing any reason thereof.
12. The bidding documents are not transferable and cost of bidding document is not refundable
under any circumstances.
13. The bidders who already participated in the NIT No.
CEO/TEC/APDCL/CAR/2013/PS(J)/T&B/111 Dtd. 04-10-13 need not apply.
Chief Executive Officer
Tezpur Electrical Circle,
APDCL, CAR, TEZPUR
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page 3
Tender Inviting Proposal TEC/ APDCL(CAR)
ASSAM POWER DISTRIBUTION COMPANY LTD. (CAR)
OFFICE OF THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE,
TENDER INVITING PROPOSALS WITH TERMS & CONDITIONS
FOR CONSTRUCTION OF 11 KV LINE & 11/0.4 KV Sub- Station including Augmentation of
33/11 KV Sub- Stations, ON TURNKEY BASIS 1. Intent of the Tender Enquiry
The intent of the Tender Enquiry is to invite proposals from the prospective and relevantly
experienced and financially sound contractor(s) (individual or joint venture)/firms to carry out the
work of CONSTRUCTION OF 11 KV LINE & 11/0.4 KV Sub- Station including Augmentation of
33/11 KV Sub- Stations as per the scope of work described in the following.
2. Scope of Work
The various activities under the scope of work shall among other related aspects cover the following.
i. Procurement and supply of all materials required for the work.
ii. Site unloading, storage and handling of all materials supplied including watch and ward for
safe custody.
iii. Site fabrication work as per requirement.
iv. Submission of implementation schedule from the date of award of contract for: -
Route survey for laying new lines/ R & M/Construction of 11 KV Line & 11/0.4KV
S/S/Augmentation of 33/11 KV S/S
Erection, testing and commissioning of all materials/equipment supplied/system installed.
v. Project management and site organization.
vi. Obtaining clearance from statutory Agencies, Government Departments, Village Panchayats
etc.
vii. Submission of specification/Test Certificate/Drawings etc. of all materials supplied.
viii. A list of various items normally involved in proposed type of work is provided in this
document. This, however, is not to be considered as limiting but only typical. Vendors’ scope
will include all other items and materials as may be required to effectively complete the work.
ix. Return of dismantled materials of dismantled lines to the concerned divisional store.
x. Required Jungle cutting.
Above all, the scope of work of the vendor/contractor will include all items and facilities as may be
necessary to complete the electrification work on turnkey basis and as binding requirement.
3. Basic specification of the various equipment/ works to be supplied carried out.
i. All equipment supplied shall conform to the requirement of relevant ISS (BIS) as approved
by Company and that of REC specification and construction standards.
ii. For ready reference, the basic specification of major items, namely- Transformer, conductor,
GI angle for cross bracing, Disc insulator 33KV/11KV, disc attachment for
raccoon/rabbit/weasel conductor, 11 KV pin insulator & G.I. pin, Polymer Insulators (Disc &
Pin), GI/MS channel, HT stay set, guy insulator, stay wire, CI earth pipe, GI wire 6/8 SWG,
nuts & bolts, washer, steel tubular pole, PSC pole, H/W fittings, Suspension/tension clamps,
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page 4
Tender Inviting Proposal TEC/ APDCL(CAR)
danger plate, pole clamps, boulder for PSC pole grouting, PCC for steel tubular pole
grouting, XLPE power cable, are provided in the Technical Specification Section. Based on
this, the vendor shall draw total specification for procurement after approval of Company.
iii. All materials supplied shall be erected, protected as per approved standard practice for
proposed type of electrical work so as to supply electricity to the consumers most effectively
and in an intrinsically safe manner.
iv. All equipment supplied and installed shall provide easy and effective:
Maintainability
Reliability
Availability
Long life
All equipment supplied and installed shall be provided stable and adequate weather
protection, system earthing etc.
v. All items, which may require frequent opening up/ dismantling for maintenance, shall be
adequately sealed against any tampering/ theft etc.
vi. All supporting structures shall be of steel as per IS 2602 appropriate grad.
vii. Generally supply and erection of materials and system shall meet the requirement laid down
by REC for rural electrification works.
4. Submission of bid
The bid shall be submitted in a sealed envelope as follows:
i. Techno-commercial bid
Under this will be included and defined vendors scope of work, responsibilities, guarantees,
specification of equipment, commercial terms and conditions, vendor’s company credentials,
experience of similar assignments, registration details, etc. as per requirement. Tender proforma
for techno-commercial Bid is enclosed as Annexure-I.
ii. Price Bid
Under this will include rates of supply and erection of different items for electrification. The
tender proforma for price Bid is enclosed as Annexure-II.
5. Estimation of material requirement:
The total quantity of materials required in each package is indicated in the Package wise BOQ in
Section 1
6. Award of work:
i) 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.
ii) Company reserves the right not to order/ award the job to the price-wise lowest party if the
party during evaluation is found technically non responsive.
iii) Work should be started within fifteen (15) days from the date of issue of the work order, failing
which order will be cancelled without further correspondence.
iv) The line/Sub-station after completion should be under custody of the contractor till the date of
commissioning and charging. The properties will be taken over by APDCL after satisfactory
commissioning and charging.
7. Period of completion:
Within 31St
March 2014.
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page 5
APDCL
8. Implementation schedule:
CONSTRUCTION OF 11 KV DEDICATED FEEDER TO JUDICIAL COMPLEX (TEZPUR)
&
CONSTRUCTION OF 11 KV LINE & 11/0.4KV S/S INCLUDING AGUMENTATION OF 33/11 KV SUB-STATION
ACCESSORIES (B.CHARIALI) (TURNKEY)
S.
N
. Description
APPROVAL PERIOD EXECUTION PERIOD
5 days 3 days. 15 days 5 days
7 d
ays
25
day
s
25
day
s
15
day
s
15
day
s
15
day
s
15
day
s
1. Preparation & submission
of bid document
2. Approval of Bid Document
3. Floating of Bid and Bidding
period
4. Opening of Bid, evaluation
& approval
5. Issue of Award, agreement
6. Manufacture & supply of
materials
7. Erection of equipments
8. Testing & commissioning
9 Cash Flow in percentage of
total sanctioned amount 2% 98%
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 6
Notice Inviting Tender APDCL
9. Termination of work order:
Company reserves the right to terminate the work order at any stage in accordance with the Company’s
General Condition of Supply and Erection.
10.1 Terms of Payment:
Payment will be made from the O/O the CGM (PP&D), APDCL, Bijule Bhawan, Paltan bazar,
Guwahati-01, Bills subject to testing and commissioning & fulfillment of clause-14(d).
10.2 Earnest Money Deposit (EMD):
The Tender must be accompanied with earnest money as mentioned in the NIT against each package
to be deposited in the form of Bank guaranty from any nationalized /Schedule bank of
India/NSC/KVP/Term Deposit/FD pledged in favour of “THE CHIEF EXECUTIVE OFFICER,
TEZPUR ELECTRICAL CIRCLE, APDCL, CAR, TEZPUR”. The earnest money to the unsuccessful
bidders will be released on finalization of the tenders. The EMD to the successful bidder will be
released on submission of Security Deposit at the time of execution of the agreement.
10.3 Security deposit and agreement:
The successful bidders shall have to deposit security money in the form of Bank Guarantee issued by
any Nationalized Bank/Scheduled Bank in Company’s standard proforma on non-judicial stamp of
appropriate value for an amount equal to 2.5% of the contract value at the time of execution of
agreement. The security deposit is liable to be forfeited in case of non-execution of contract/ work
order. The security deposit will be released on successful commissioning and testing of the materials
ordered and after depositing performance B/G as per clause 14(d).
11. Basic qualifying requirement:
The prospective bidder must fulfill the following pre-bid qualifying requirement
a. The bidder must have valid electrical Contractor’s and Supervisor’s License (HT) issued by the
Licensing Authority of Govt. Of Assam. .
b. The bidder must have adequate experience of doing similar job on turnkey basis.
c. Average annual turnover of the bidder for last three consecutive financial years should be at least
as per the requirement shown in the table against particular package or packages and the annual
turnover should be certified by a registered Chartered Accountant with balance sheet.
d. The tenderer shall furnish latest Income Tax clearance certificate and sales tax registration and
valid Labour License and WCT registration Certificate.
12. Other requirements:
The Tenderer
i) Should be acquainted himself or his associate with relevant conditions of the local geography
and socio economic setup of the different location of the State and being capable accordingly
to mobilize, organize and expedite the activities.
ii) Should have adequate working personnel comprising of Electrical/ Mechanical engineers,
electrical supervisor, skilled and unskilled labour to be deputed to the proposed assignment.
iii) Should be conversant with the code/ standards applicable to proposed type of work. ISS, REC
guidelines.
13. Project Management and site Organizations:
In Consideration of the tight schedule of the project, the successful bidder(s) /Contractor(s) shall
exercise systematic closely controlled project management system with the aid of commonly used
soft tools. Following are the major activities/deliverables to be organized /generated for submission
to the Board.
(I) Liaison/Construction offices will be established in each Circle of APDCL.
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 7
Notice Inviting Tender APDCL
(II) Work Progress Report:
Progress monitoring by the contractor as per implementation schedule and approved
milestones.
Fortnightly progress report will be submitted to the concern Deputy General Manager,
Senior Manager & Sub-Divisional Engineers.
The progress report will highlight the points like, work completion vis-à-vis planned, plan
for next working period, delay analysis vis-à-vis committed schedule with reasons and
remedies etc.
(III) Site Organization.
The vendor at each working site shall establish the following.
Store house
Site fabrication facilities
Construction supervision office
All offices shall be adequately furnished and staffed so as to take all site decisions independently
without frequent references to head Work’s/offices.
14. Guarantees and Penalties
a) Liquidated Damages (LD)
The proposed work is on top priority of Government of Assam and therefore has to be completed
within stipulated/agreed schedule. Any delay beyond that will attract penalty as per Company’s
general condition of supply and erection.
b) Equipment and system installed shall be guaranteed individually for integrated operations for a
period of 18 (Eighteen) months from date of commissioning of a system. In case of detection of any
defect in individual equipment or system as a whole, the same shall be replaced by the vendor free of
cost within 15 days of intimation by the Company’s representative.
c) Warranty from the manufacturer shall be produced along with manufacturer’s test certificate for the
following items
All Types of Insulators with Hardware fittings.
Stay set
All other equipment usually covered under Manufacturer’s warranty.
d) A performance Bank Guarantee from a Nationalized Bank/Scheduled Bank in Board’s standard
proforma on Non judicial stamp paper of appropriate value with a validity of 18 (eighteen) months
@ 10% of total value of work executed shall have to be furnished by the Contractor before final
payment.
15. Approvals/Clearances:
1. APDCL’s Engineer shall approve all drawings and documents prepared by the contractor for
construction of the Lines & Sub-Station.
2. The contractor shall obtain all statutory approvals and clearances from the statutory authorities
before charging the system.
16. Environmental Considerations:
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 8
Notice Inviting Tender APDCL
While carrying out the assignment, no damage to environment /forests will be caused by the
contractor. If so done, the contractor will have to compensate the same to the satisfaction of the
concerned Authority.
17. Submission of documents.
a) With bids.
i) Detail list of makes and materials offered with catalogues, technical specification etc.
ii) Certificates and testimonials in support of credentials of the bidder’s organization.
iii) Details past experience.
iv) Brief write-up on methodology to carry out the assignment, if awarded.
v) Details of manpower to be engaged for the assignments.
vi) Any other information, the vendor may feel facilitative in evaluating the bid.
vii) Copies of contractor and supervisor’s license, income Tax clearance certificate, turnover, etc.
viii) Photo copy of the PAN card.
ix) Empanelment Certificate of Tezpur Electrical Circle.
x) Copy of Labour License.
xi) Copy of Provident Fund Certificate.
b) During project execution
i) All documents for approval shall be submitted in 2 copies.
ii) All final documents to be submitted to statutory organizations will be furnished as per requirement of
the authority.
18. Funding of the project.
The proposed work is to be done under
19. Disclaimer:
While the Company will make every endeavor to extend necessary facilitation in expediting the
work, the contractor shall be responsible to organize and arrange all necessary inputs right from
mobilization activities up to completion of the project. Company will not entertain any failure / delay
on such accounts. Also, Company will not be responsible for any compensation, replenishment,
damage, theft etc. as may be caused due to negligent working, insufficient coordination with
Government / non Government / Local Authority by the contractor and/ or his personnel deputed for
work. The contractor shall take necessary coverage under LIC/GIC etc. for his working personnel
and the goods in store as well as in transit. The contractor will be deemed to have made him
acquainted with the local working conditions at site(s) and fully provide for into the bid submitted.
20. Terms and conditions, which are not specified, herein above will be governed by the Company’s
General Terms and Conditions of supply and erection.
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 9
Notice Inviting Tender APDCL
Annexure - I
Tender Proforma part – I (Techno-commercial Bid)
NIT No. CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/……………….. Due date of Tender: 19.10.13
1. Name and full address of the :
Tenderer.
2. Particulars of payment made for :
purpose of tender documents money
receipt No: and Date.
3. Amount of earnest money paid with :
Money receipt No and date/ Bank Call
Deposit No: and Date.
4. Whether Sales Tax and Income Tax : Yes / No
clearance certificate submitted
5. Sales Tax Registration No: :
6. WCT registration certificate with validity :
7. Acceptance of guarantee clause of :
Materials /equipment and system
Installed individually and for integrated
Operation.
8. Acceptance of penalty clause :
9. Acceptance of terms of payment :
10. Certificate/ documents regarding works :
Done with value with last three years if any
11. Certificate/ documents regarding adequate :
Experience of doing similar job of rural
Electrification or similar electrification work
12. Acceptance for carrying out electrification :
Work of at least one (one) similar work
13. Details of manpower and T&Ps including :
Vehicles available with the firm to be
Enclosed separately.
14. List of documents enclosed :
.
Signature with full name
and designation of the Bidder
(Authorized person)
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 10
Notice Inviting Tender APDCL
Annexure- I(B)
Sl No. Qualification Requirement
Furnished
at
Annexure
Page Remark
A LEGAL
1 Document in support of legal status of firm
2 Memorandum of Association &Registered/Notarized Joint venture Agreement if JV
3 Registered/Notarized power of attorney of the signatory of the Bidder to
participate in the Bid.
4 Board resolution of the company to authorizing the signatory
5 Information regarding any litigation, current or during the last five years, in
which the Bidder is involved, the parties concerned, and disputed amount
6 Valid Electrical Contractor's License
7 Valid Electrical & Supervisory License
8 VAT/CST/WCT/Service Tax/Labour registration certificate
9 Provident Fund Registration Certificate
B Financial
1 Audited Balance sheet, Profit & Loss account, Auditor’s report for last
three year
2 CA Certified Turnover of bidder during the last 3(three) years.
3 Evidence of adequacy of working capital for this contract (access to line (s) of credit and availability of other financial resources)
4 Authority to seek references from the Bidder's Bankers
5 Income Tax return for last 3(three) years
6 Value of similar work performed by the bidder in each of the last five years – Statement
7 Proposals for subcontracting components of the Works amounting to more
than 10 percent of the Contract Price
8 Details of the EMD (BG/KVP/TD/Bank Call Deposit)
C Technical ability and experience
1 Experience in works of a similar nature and volume for each of the last 5(five) years and details of works under way or contractually committed
including full address of client for communication- Statement
2
Certificates issued by an Engineer not below the Cadre of Deputy General
Manager/SE along with supporting photo-copies of agreements for the works executed in any one year (12 months)
3
Detailed activity plan and methodology supported with layout and necessary
drawings and calculations (detailed) to allow the employer to review their
proposals.
4 Quality Assurance plan with Bar Chart
5 List of technical personnel and their qualification and experience with
organization chart
6 Proof of availability of the tools, tackles, spare parts, etc. for carrying out
the works.
D Technical particulars of equipments and Materials offered in the Bill of
Material and their GTPs
Annexure - II
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 11
Notice Inviting Tender APDCL
Tender Proforma part-II (Price Bid)
NIT No. CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/…111…………….. Submission date of Tender: 19.10.13
Package for which tendered: PS(J)/T/01 :-Construction of 11 KV Dedicated Feeder to Judicial complex
(Tezpur)
Name and full address of the Tenderer:
Sl.
No
Items QTY Unit Unit
Rate ( Rs.)
Max
Amount
Payable (Rs.)
1. Supply, Erection of MS Tubular pole SP-66 ,12 Mtr l length perpendicular
to the ground including excavation of earth pit with depth of 1/5th
of the
length of the pole including grouting of pole above two feet ground level
63 Nos.
2. Supply, fitting and fixing of 11 KV Channel Cross Arm (
75X40x6X2200mm) MS
160 Nos.
3. Supply, fitting and fixing of HT Stay Set including grouting 20 Sets
4. Supply, fitting and fixing of HT Guy Insulator 20 Nos.
5. Supply, fitting and fixing of HT Stay Wire 140 Kg
6. Supply, fitting and fixing of 11KV Disc Insulator,45 KN 258 Nos.
7. Supply, fitting and fixing of Hardware Fittings for Disc Insulator 129 Sets
8. Supply, fitting and fixing of 11 KV Pin Insulator with GI pin 162 Nos.
9. Supply ,fitting & fixing of AAA Raccoon Conductor 8.5 Km
10. Supply ,fitting & fixing of the Pole Clamp 210 Nos.
11. ,Erection ,testing ,charging & Commissioning of 11/0.4, 1x100KVA
Transformer
1 No.
12. Supply, fitting and fixing of Gang Operated Switch,400 A 2 Sets
13. Supply ,fitting & fixing of DO Fuse Set,150 Amps 2 Set
14. Supply, fitting & fixing of C I. Earth Pipe by digging of earth pit using
standard earth pipe and finely broken charcoal surrounding the pipe and
connecting Wires.
24 Nos.
15. Supply , fitting & fixing of GI Wire,8 SWG including guarding and
earthing
1000 Kg
16. Supply fitting & fixing of Aluminum lug (Assorted) 60 Nos
17. Supply, fitting & fixing of the Danger Plates 63 Nos.
18. Supply, fitting & fixing of the PVC Cable,1-core Cable 95 Sqmm 40 Mtr.
19. Supply, fitting and fixing of 11KV LA, 9 KA line type including connection
of earthing wire to the earthing electrode with nuts –bolts, washer etc.
2 Set
20. Supply, fitting & fixing of the Security Fencing 15 Sq.Mtr
21. Supply , fitting & fixing of MS Nuts & Bolts with washer 183 Kg
22. Supply , fitting & fixing of LT angle cross Arm 150 No
23 Supply, fitting and fixing of MS angle(50X50x6X5000mm) 30 Nos
24 Supply, fitting and fixing of Shackle Insulator With fittings 300 Set
25 Fitting and fixing of 11 KV CT-PT Set 1 Set
26 Supply, fitting and fixing of indoor Cable Kit (185 Sqmm) 1 No
27 Supply, fitting and fixing of outdoor cable kit(185Sqmm) 1 No
28 Supply, fitting and fixing of 11KV3-core XLPE Cable 185 Sqmm 96 Mtr
N.B: 1) Rate including supply, erection, testing and commissioning but in case of SL. No.-11 &
26 only, erection, testing and commissioning rate to be quoted.
Signature with full name
and designation of the Bidder (Authorized person)
CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/111Dtd. 04-10-2013 Page No 12
Notice Inviting Tender APDCL
Annexure-I (A)
BOQ for Package No- PS(J)/T/01
For CONSTRUCTION OF 11 KV DEDICATED FEEDER TO JUDICIAL COMPLEX (TEZPUR)
1
Steel Tubular Pole SP-66 12 Mtr Length coated with two coats
of primer and aluminium paint No. 63
2 MS Angle 50x50x6x5000mm No. 30
3 MS- Channel X Arm (75x40x6x2200 mm) No. 160
4 11KV GOAB 400A Set. 2
5 11 D.O Fuse Set 2
6 11 KV L.A 9 KA Line Type Set 2
7 11 KV Disc Insulator Porcelain 45 KN No. 258
8 Hardware Fitting for Disc No. 129
9 11 KV Pin Insulator With GI Pin Set 162
10 11/0.43 KV 100 KVA Transformer (ONLY INSTALATION) No. 1
11 AAAC Raccoon Conductor KM 8.5
12 CI Earth Pipe No. 24
13 GI Wire 8 SWG Kg 1000
14 LT Cross Arm No. 150
15 Pole Clamp LT No. 210
16 Security Fencing Mtr 15
17 Shackle Insulator with fittings No. 300
18 M/S Nuts & Bolts & Washer Kg. 183
19 11 KV Danger Plate No. 63
20 Outdoor Cable Kit 185 Sqmm 3 Core Set 1
21 Indoor Cable Kit 185 Sqmm 3 Core Set 1
22 11 KVXLPE Cable 3 Core 185 Sqmm 11 KV Mtr. 96
23 PVC S/C Cable 95 Sqmm Mtr 40
24 HT Stay Set Set 20
25 HT Guy Insulator No. 20
26 Stay Wire7/10 SWG Kg 140
27 Aluminium Lugs (Assorted) No. 60
28 Grouting of SP-66 Steel Tubular Pole/Stay Set No. 83
29 11 KV C.T.P.T Set (INSTALLATION ONLY) No. 1
N.B: 11/0.4KV DTR’s, C.T.P.T, Breakers and Control & Relay Panels will be procured centrally from CGM (D),
APDCL, CAR, Bijulee Bhawan, Paltan Bazar, Guwahati-01. Erection of the same will be executed by the
contractor.
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Notice Inviting Tender APDCL
Tender Proforma part-II (Price Bid)
NIT No. CEO/TEC/APDCL/CAR/2011/PS(J)/T&B/…111…………….. Submission date of Tender: 19.10.13
Package for which tendered: PS(J)/B/02 :-Construction of 11 KV line & 11/0.4 KV S/S including
Augmentation of Sub-Station Accessories at Biswanath Chariali ,
Name and full address of the Tenderer:
Sl.
No
Items QT
Y Unit Unit Rate
(Rs.) Max Amount
Payable (Rs.)
1 Supply, Erection of 8.5 metres PSC pole perpendicular to the ground
including excavation of earth pit with depth of 1/5th
of the length of the
pole including earth filling, boulder packing & ramming up to the ground
level
17 Nos.
2 Supply, fitting and fixing of 11 KV Channel Cross Arm
(10X50x6X2200mm) MS
24 Nos.
3 Supply, fitting and fixing of HT Stay Set 5 Sets
4 Supply, fitting and fixing of HT Guy Insulator 5 Nos.
5 Supply, fitting and fixing of HT Stay Wire 50 Kg
6 Supply, fitting and fixing of 11KV Disc Insulator,
70 KN polymer
24 Nos.
7 Supply, fitting and fixing of Hardware Fittings for Disc Insulator 24 Sets
8 Supply, fitting and fixing of 11 KV Pin Insulator with GI pin polymer 18 Nos.
9 Supply ,fitting & fixing of AAA Raccon Conductor 0.8 Km
10 Grouting of Isolator structure supplying all materials. 1 Set
11 Erection ,testing ,charging & Commissioning of 11/0.4, 1x63KVA
Transformer
1 No.
12 Supply, fitting and fixing of Gang Operated Switch,400 A 3 Sets
13 Supply ,fitting & fixing of DO Fuse Set,150 Amps 3 Set
14 Supply, fitting & fixing of C I. Earth Pipe by digging of earth pit using
standard earth pipe and finely broken charcoal surrounding the pipe and
connecting Wires.
8 Nos.
15 Supply , fitting & fixing of GI Wire,6 SWG including guarding 100 Kg
16 Supply fitting & fixing of Aluminium lug (Assorted) 24 Nos
17 Supply, fitting & fixing of the Danger Plates 10 Nos.
18 Supply, fitting & fixing of pilfer proof meter cabinet 1 No
19 Supply, fitting and fixing of 11KV LA, 9 KA station type including
connection of earthing wire to the earthing electrode with nuts –bolts,
washer etc.
3 Set
20 Fitting & fixing of 11 KV Autorecloser 1 Set
21 Supply , fitting & fixing of MS Nuts & Bolts with washer 25 Kg
22 Supply , fitting & fixing of 11 KV isolator with earth switch & G.I
mounting structure. 1 Set
23 Supply, fitting and fixing of T cross arm 5 Nos
24 Supply of gravel 40 mm size for switchyard including Spreading 92 Cum
25 Supply, fitting and fixing of 10 core 2.5mm copper cable 7 Set
26 Fitting and fixing of 11 KV CT-PT Set 1 Set
27 Supply, fitting and fixing of CFL light 40 W with accessories 10 Set
28 Supply, fitting and fixing of out door cable kit(300Sqmm) 2 No
29 Supply, fitting and fixing of 11 KV, 3-core XLPE Cable 300 Sqmm 200 Mtr
30 Supplying fitting & fixing of Tension clamp for Raccoon 24 No
31 Supplying fitting & fixing of barbed wire 25 Kg
N.B: 1) Rate including supply, erection, testing and commissioning but in case of SL. No.-11,20
& 26 only , erection, testing and commissioning rate to be quoted .
Signature with full name
and designation of the Bidder (Authorized person)
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Notice Inviting Tender APDCL
Annexure-I (B)
BOQ for Package No- PS(J)/B/02
CONSTRUCTION OF 11 KV LINE & 11/0.4KV S/S INCLUDING AGUMENTATION OF 33/11 KV
SUB-STATION ACCESSORIES (B.CHARIALI)
1. PSC Pole 8.5 Mtr Nos. 17
2. MS Channel X Arm (100x50x6x2200mm) Nos. 24
3. HT Stay Set Set 5
4. Guy Insulator Nos. 5
5. Stay Wire 7/10 SWG Kg 50
6. Disc Insulator 70 KN Polymer Nso. 24
7. Hardware fittings for Disc Nos 24
8. 11 KV ,3 Core XLPE Cable 11 KV 300 Sqmm Mtr 200
9. T Cross Arm Nos. 5
10. 11 KV Pin Insulator With GI Pin polymer Set 18
11. 11 KV Isolator With earth switch & G.I mounting structure Set. 1
12. AAAC Raccoon Conductor Km. 0.8
13. Tension Clamp For Racoon Set 24
14. 11/0.433KV 63 KVA Transformer (INSTALLATION ONLY) No. 1
15. 11 KV GOAB Switch 400 A Set 3
16. 11 KV D.O Fuse 150 amp Set 3
17. C.I Earth Pipe Nos. 8
18. GI Wire 6 SWG Kg. 100
19. Metering Cabinet No. 1
20. Danger Plate 11 KV Nos. 10
21. 10 Core Cable 2.5 Sqmm Cu. Mtr 7
22. 11 KV 9 KA Line Type Station Arrestor Set 3
23. 11 KV Outdoor Cable Kit 300 Sqmm 3 Core Set 2
24. Nuts & Bolts with washer Kg 25
25. 11 KV Autorecloser (INSTALLATION ONLY) Set 1
26. 11 KV C.T.P.T Set (INSTALLATION ONLY) Set 1
27. Switchyard gravelling Cum 92
28. Barbed wire Kg 25
29. Switchyard Lighting (Should be Sufficient for Lighting of the Sub-Station)
(10 Nos of CFL LIGHTING FIXTURE INCLUDING CFL (40 Watt) WITH
WIRING ETC ON EXISTING & NEW STEEL STRUCTURE)
Set 10
30. Grouting of isolator structure No 1
31. Aluminum lug assorted No 24
N.B: 11/0.4KV DTR’s, C.T.P.T, Breakers and Control & Relay Panels will be procured centrally from CGM (D),
APDCL, CAR, Bijulee Bhawan, Paltan Bazar, Guwahati-01. Erection of the same will be executed by the
contractor.
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GENERAL REQUIREMENTS
The bidder shall comply with the following general requirements along with other specifications.
1.0 QUALITY ASSURANCE PLAN
1.1 The bidder shall invariably furnish the following information along with his offer failing which the
offer shall be liable for rejection. Information shall be separately given for individual type of
equipment offered.
i) The structure of organization
ii) The duties and responsibilities assigned to staff ensuring quality of work
iii) The system of purchasing, taking delivery and verification of materials
iv) The system for ensuring quality of workmanship
v) The quality assurance arrangements shall confirm to the relevant requirement of ISO 9001 on
ISO 9002 as applicable.
vi) Statement giving list of important raw materials, names of sub-supplies for the raw materials,
list of standards according to which the raw material are tested, list of tests normally carried
out on raw material in the presence of suppliers representative, copies of test certificates.
vii) Information and copies of test certificates as on (i) above in respect of bought out items
viii) List of manufacturing facilities available
ix) Level of automation achieved and list of areas where manual processing exists. x) List of areas in manufacturing process, where stage inspections are normally carried out for
quality control and details of such test and inspection. xi) List of testing equipment available with the bidder for final testing of equipment specified and
test plant limitation, if any vis-à-vis the type. Special acceptance and routine tests specified in
the relevant standards. These limitations shall be very clearly brought out in "Schedule of
Deviations" from the specified test requirement.
1.2 The contractor shall within 30 days of placement of order, submit the following information to the
purchaser.
i) List of the raw material as well as bought out accessories and the names of sub-suppliers
selected from those furnished along with the offer.
ii) Type test certificated of the raw material and bought out accessories if required by the
purchaser.
iii) Quality Assurance Plant (QAP) with hold points for purchasers inspection. QAP and
purchasers hold points shall be discussed between the purchaser and contractor before the
QAP is finalized.
The contractor shall submit the routine test certificates of bought out accessories and central excise
asses for raw material at the time of routine testing if required by the purchaser and ensure that the
quality assurance requirements of specification are followed by the sub-contractor.
1.3 The Quality Assurance Programme shall give a description of the Quality System and Quality Plans
with the following details.
i) Quality System
The structure of the organization.
The duties and responsibilities assigned to staff ensuring quality of work.
The system of purchasing, taking delivery of verification of materials
The system of ensuring of quality workmanship.
The system of control of documentation.
The system of retention of records.
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The arrangement of contractor internal auditing .
A list of administrator and work procedures required to achieve contractors quality
requirements. These procedures shall be made readily available to the purchaser for
inspection on request.
ii) Quality Plans
An outline of the proposed work and program sequence .
The structure of contractor’s organizations for the contract.
The duties and responsibilities ensuring quality of work.
Hold and notification points.
Submission of engineering documents required by this specification.
The inspection of the materials and components on request.
Reference to contractors work procedures appropriate to each activity.
Inspection during fabrication /construction.
Final inspection and test.
2.0 Training of Personnel
The contractor shall provide necessary facilities for training personnel at their works/principals
works relating to design, manufacture, assembly and testing and operation maintenance for six
personnel free of cost. However, travel and incidental charges of the personnel will be borne by the
purchaser.
3.0 Inspection
3.1 The Owner's representative or third party nominee shall at all times be entitled to have access to
the works and all places of manufacture, where insulator, and its component parts shall be
manufactured and the representatives shall have full facilities for unrestricted inspection of the
Contractor's and sub-Contractor's works, raw materials, manufacture of the material and for
conducting necessary test as detailed herein.
3.2 The material for final inspection shall be offered by the Contractor only under packed condition
as detailed in the specification. The Owner shall select samples at random from the packed lot
for carrying out acceptance tests. Insulators shall normally be offered for inspection in lots not
exceeding 5000 nos. the lot should be homogeneous and should contain insulators
manufactured in the span of not more than 3-4 consecutive weeks.
3.3 The Contractor shall keep the Owner informed in advance of the time of starting and the
progress of manufacture of material in their various stages so that arrangements could be made
for inspection.
3.4 No material shall be dispatched from its point of manufacture before it has been satisfactorily
inspected and tested unless the inspection is waived off by the Owner in writing. In the latter
case also the material shall be dispatched only after satisfactory testing for all tests specified
herein have been completed.
3.5 The acceptance of any quantity of material shall be no way relieve the Contractor of his
responsibility for meeting all the requirements of the specification and shall not prevent
subsequent rejection, if such material are later found to be defective.
4.0 Additional Tests
4.1 The Owner reserves the right of having at his own expense any other test(s) of reasonable
nature carried out at Contractor's premises, at site, or in any other place in addition to the type,
acceptance and routine tests specified in these bidding documents against any equipments to
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Notice Inviting Tender APDCL
satisfy himself that the material comply with the Specifications.
4.2 The Owner also reserves the right to conduct all the tests mentioned in this specification at his
own expense on the samples drawn from the site at Contractor's premises or at any other test
center. In case of evidence of noncompliance, it shall be binding on the part of the Contractor to
prove the compliance of the items to the technical specifications by repeat tests or correction of
deficiencies, or replacement of defective items, all without any extra cost to the Owner.
5.0 Test Reports
5.1 Copies of type test reports shall be furnished in at least six (6) copies along with one original.
One copy shall be returned duly certified by the Owner only after which the commercial
production of the concerned materials shall start.
5.2 Copies of acceptance test reports shall be furnished in at least six (6) copies. One copy shall be
returned duly certified by the Owner, only after which the material shall be despatched.
5.3 Record of routine test reports shall be maintained by the Contractor at his works for periodic
inspection by the Owner's representative.
5.4 Test certificates of test during manufacture shall be maintained by the Contractor. These shall be
produced for verification as and when desired by the Owner.
6.0 List of Drawings and Documents:
6.1 The bidder shall furnish the following along with bid.
i) Two sets of drawings showing clearly the general arrangements, fitting details, electrical
connections etc.
ii) Technical leaflets (users manual) giving operating instructions.
iii) Three copies of dimensional drawings of the box for each quoted item.
The manufacturing of the equipment shall be strictly in accordance with the approved drawings and
no deviation shall be permitted without the written approval of the purchaser. All manufacturing and
fabrication work in connection with the equipment prior to the approval of the drawing shall be at the
supplier's risk.
Approval of drawings/work by purchaser shall not relieve the supplier of his responsibility and
liability for ensuring correctness and correct interpretation of the drawings for meeting the
specification.
6.2 The requirements of the latest revision of application standards, rules and codes of practices. The
equipment shall conform in all respects to high standards of engineering, design, workmanship and
latest revisions of relevant standards at the time of ordering and purchaser shall have the power to
reject any work or materials which, in his judgment is not in full accordance therewith.
6.3 The successful Bidder shall within 2 weeks of notification of award of contract submit three sets of
final versions of all the drawings as stipulated in the purchase order for purchaser's approval. The
purchaser shall communicate his comments/approval on the drawings to the supplier within two
weeks. The supplier shall, if necessary, modify the drawings and resubmit three copies of the
modified drawings for their approval. The supplier shall within two weeks. Submit 30 prints and two
good quality report copies of the approved drawings for purchaser's use.
6.4 Eight sets of operating manuals/technical leaflets shall be supplied to each consignee for the first
instance of supply.
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6.4.1 One set of routine test certificates shall accompany each dispatch consignment.
6.4.2 The acceptance test certificates in case pre-dispatch inspection or routine test certificates in cases
where inspection is' waived shall be got approved by the purchasers.
7.0 Any Item specification if not available in this document Contractor shall supply and execute the
items meeting the relevant IS specification with the approval of the purchaser
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SECTION -2
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1.0 TECHNICAL SPECIFICATION FOR EXECUTION OF WORK
(FOR 33KV/11KV & LT LINES)
1.0 SCOPE : ERECTION OF 11 KV LINES & LT LINES WITH STP-SP66 & 9.75
M, 8.5 M AND 7.5 M PSC POLES
The scope covers the survey of the proposed route, tree clearance wherever necessary transport
of materials to the locations, erection of the line testing of the line and handing over to the
APDCL(CAR) as per specification. Materials such as steel, cement, PSCC Poles, top cleats,
clamps, washers, earth wires, HBG metal, sand, water, cost of bolts and nuts etc., as given in
Annexure-1 are to be procured by the contractor cost of which shall be included in the bid.
2.0 General :
The Contractor should be well acquainted with the IE Rules 1956 as amended
from time to time and with the Indian Telegraph Act 1889 so that necessary
provisions therein may be followed.
3.0 SURVEY OF THE RUTE
The Tentative route map of the line to be erected will be furnished by the APDCL(CAR) to the
Contractor along with the copy of the concluded agreement.
The Contractor is required to carry out the detailed survey of the route of the line and fix up the
locations at the average span indicated in the schedule and mark the locations and submit a
detailed route map to the Engineer in charge of the work within 30 days for approval. In the
course of surveying by the contractor, any conspicuous variations in the change and physical
feature to those indicated in the route map and as actually existing are noticed, the deviations
must be brought to the notice of the APDCL(CAZ) Engineer. The APDCL(CAZ) Engineer if
considered necessary shall make alterations, which shall be carried out accordingly and the
APDCL(CAZ) after inspecting the surveyed route and the revised route map shall be given for
final approval in writing. The contractor shall not commence the work until the final approval
of the route map is given by the Engineer in charge in writing to the contractor.
4.0 WAY LEAVES AND TREE CUTTINGS
Proposals for way leaves and right of way shall be submitted by the contractor. Permission will
be obtained by the APDCL(CAZ) within reasonable time for which due notice shall be given
by the Contractor. The Contractor shall arrange for tree cutting or tree branches cutting also.
The widths of tree clearance to be adopted for lines of various voltages are as detailed below:
a) 11 KV Line and LT (Normal Line)
All growth within 4.572 M (15 ft) on both side from center line of support and all trees that
may fall and foul the line.
b) 11 KV / 33 KV LINE (Trunk Line)
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All growth within 6.096 M (20 ft) from the center line of support and all trees which may
fall and foul the line.
The Contractor shall take all possible steps to see that standing crops, etc. are not damaged
while attending to tree cutting. When such damage is inevitable the compensation will be
borne by the APDCL(CAZ) provided the damage is with the prior concurrence of the
Engineer. The Contractor shall bear the compensation for damage caused by the gangs
without prior concurrence of the Engineer concerned.
No trees shall be cut until the APDCL(CAZ) has made necessary arrangement with the
authorities concerned and permission is given to the Contractor to fell such trees. The
contractor shall arrange to remove the obstacles as soon as possible.
At such times, when it may not possible for APDCL(CAZ) to arrange right-of-way for
excavation of pole pits or erecting the poles of stringing the line, then at all such times, the
contractor shall shift his gangs to other areas. The rates quoted shall cover all such
contingencies and no extra payments shall be claimed for such contingencies.
5.0 EXCAVATION OF POLE PITS, STAY PITS AND D.P. PITS
5.1 After the final survey of the line and after marking the pole locations with pegs, excavation
work has to be commenced in accordance to the approved route map. Excavation is generally
done by pick axes, crow V-bars and showers although some times earth augers are used.
Excavation of pole pits in very hard or rocky soil or in rock beds, may involve blasting with
suitable explosives. The pits for the supports are excavated in the direction of the line as this
will facilitate the erection of support are excavated in the direction of the line as this will
facilitate the erection of support, in addition to giving greater lateral stability, the depth of the
foundation to be excavated for poles shall be in accordance with relevant sketch for the
erection of pole or stay of D.P. etc.
6.0 ERECTION OF SUPPORTS
After the excavation of pits is completed the supports to be erected may be brought to the pits
location. Then the pole may be erected inside the pit. Wooden support may be utilized to
facilitate lifting of the pole at the pit locations.
Before the pole is put into pit, RCC padding may be laid below the pole to increase the surface
contact between the pole and the soil. The padding will distribute the weight of the pole
uniformly on the soil.
Having lifted the pole, the same should be kept in a vertical position with the help of manila
rope of 25 mm dia using the rope as a temporary anchor.
As the poles are being erected say from the pole already erected to the next location where the
pole is being erected, the alignment of the poles are to be checked and set right by visual check.
The verticality’s of the poles are to be checked with a spirit level on both transverse and
longitudinal directions.
Having satisfied that the verticality and alignment are all right, earth filling or concreting is to
be done.
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In swampy and special locations, however, before earth filing, the poles are to be concreted up
to ground level of the pit.
After the poles have been set the temporary anchors are to be removed. The supports shall be
buried to a depth as per sketch enclosed.
7.0 ERECTION OF D.P. STRUCTURES FOR ANGLE LOCATIONS (FOR 33/11
KV LINES):
Generally, for angles of deviation more than 20° double pole structures of spacing 1.2 mts (4.0
ft) may be erected. The pits are to be excavated as per bisection of the angle of deviation.
After the poles are erected, the horizontal / cross bracing should be fitted and the supports held
in a vertical position with the help of temporary guys of manila rope of at least 25 mm dia.
Ensuring that the poles are held in a vertical position (this can be checked with a spirit level)
the concreting of the poles with cement, granite chips of size 20/30 mm mesh and sand in the
ratio M400 conforming to ISS is to be done from the bottom of the support to the ground level.
Before lifting the pole in the pit, concrete padding of not less than 75 mm thickness may be put
for the distribution of the load of the support on the soil.
After the concreting is done, the pit may be filled with earth after curing of the concrete is
completed.
Four stays along the line, two in each direction and two stays along the bisection of angle of
deviation are to be provided.
Stay concreting may be done with M 400 concrete mixture.
The D.P. shall be erected as per the sketch enclosed.
8.0 ANCHORING AND PROVIDING GUYS FOR SUPPORTS
Guys are to be provided to the supports at the following places (i) Angle locations, (ii) Dead
end locations, (iii) Tee-off points, (iv) Steep gradient locations to avoid uplifted on the poles.
The installation of guy will involve the following works:
i) Excavation of pit and fixing of stay rod.
ii) Fastening guy wire to the support.
iii) Tightening guy wire and fastening to the anchor
The marking of the guy pit for excavation, the excavation of pits and setting of the anchor rod
must be carefully carried out. The stay rod should be placed in the position such that the angle
of inclination of the rod with the vertical face of the point is 30°/45° as the case may be. The
concreting of the stay at the bottom should then be carried out. The back filling and ramming
must be well done thereafter, and allowed to set for at least 7 days. The free end of the guy wire
is passed through the eye of the anchor rod, bent back parallel to the main portion of the guy
and bound after inserting the G.I. Thimble. The loop is protected by the G.I. Thimble, where it
bears on the anchor rod. Where the existence of guy wire proves hazardous, it should be
protected with suitable asbestos pipe, filled with concrete of about 2 mts length above the
ground level, duly painted with white and black stripe so that it may be visible at night. The
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turn buckle shall be mounted at the pole end of the stay and guy wire so fixed that the eye bolt
turn buckle is half way in the working position, thus giving the maximum movement for
tightening or loosening.
Guy insulators are placed to prevent the lower part of the guy from becoming electrically
energized by a contact of the guy when the conductors snap and fall on them of due leakage.
No guy insulator shall be located less than 2.6 mts. from the ground.
The anchoring and providing guys for supports (Single guy Bow guy fly guy) shall be done as
per sketch enclosed. Bow guy and fly guy shall be provided as per field conditions.
9.0 FIXING OF CROSS ARMS INSULATORS
After the erection of supports and providing guys, the next step would be to mount the cross
arms on the support erected. The lineman should climb the support having requisite tools with
him and the cross arm is then tied to a hand line and pulled up by the ground man and should
station himself well to one side so that if any material drops from the top of the pole it may not
strike him. All the materials required should be lifted or lowered by means of the hand line. In
no case, the materials of the tools should be dropped or thrown from the pole top.
The fixing of 33 KV, 11 KV and LT Cross arms shall be in accordance to spacing detailed in
Sketch. G.I. bolts and nuts and spring washers of good quality only shall be used which will
have to be procured by the contractor.
9.1 Back Clamps
The back clamps for fixing of the seating channels, “V” cross arms, horizontal cross
arms and top cleats will have to be procured by the contractor and shall be in
accordance with sketch enclosed and the clamp shall be fabricated with 75 X 8 mm
M.S. Flat for 33 KV and 50 X 8 mm M.S Flat for 11 KV and LT.
9.2 Top Cleats
The top cleats shall be got fabricated with M.S. Channel of size 75 X 40 mm for 33 KV
and 11 KV and shall be in accordance with sketch enclosed..
10.0 INSULATORS
The pins for insulators shall be fixed in the holes provided in the cross arms and the pole top
brackets. The insulators shall be mounted in their places over pins and tightened. In the case
of strain or angles supports, where strain fittings are provided for this purpose, one strap of
the strain fitting is placed over the cross arm before placing the bolts in the hole of the cross
arms. The nut of the strap is so tightened that the strap can move freely in horizontal
direction, as this is necessary to fix the strain insulator.
The insulator shall be cleaned and examined for defects before fixing, it shall be ensured
that all the current carrying parts are smooth and without dirt, cracks or chips.
11.0 STRINGING OF THE LINE CONDUCTORS
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11.1 For the guidance of the contractor certain do’s and don’ts are given below before the
workmen actually commence the stringing work.
11.2 Do’s and Don’ts
DO’s
i. Use proper equipment for handling aluminum conductors at all times.
ii. Use skids, or similar method for lowering reels or coils from transport or
ground.
iii. Examine reel before unreeling for presence of nails or any other object,
which might damage the conductor.
iv. Rotate the reel or coil while unwinding conductor.
v. Grip all strands while pulling out the conductor.
vi. Control the unreeling speed with suitable braking arrangement.
vii. Use wooden guards of suitable braking arrangement.
viii. Use long straight, parallel jaw grip with suitable liners when pulling
conductor thus avoiding nicking or kinking of the conductor.
ix. Use free running sleeves or blocks with adequate grooves for drawing/paving
conductors.
x. Use proper sag charts.
xi. Mark conductors with crayons or adhesive tape of such (other) material,
which will not damage the strand.
xii. Make all splicing with the proper tools.
xiii. Use a twisting wrench for twisting the joints.
xiv. Chromite or graphite conducting oxide-inhibiting grease should be used
before cleaning with wire brush.
DON’Ts
i. Do not handle conductors without proper tools at any stage.
ii. Do not pull conductors without ensuring that there are no obstructions on the
ground.
iii. Do not pull out excess quantity of conductor than is required.
iv. Do not make jumper connections on dirty or weathered conductor.
v. Do not handle aluminum conductors in a rough fashion but handle it with
care it deserves.
11.3 CONDUCTOR ERECTIONS
The erection of overhead line conductor is a very important phase in construction. The
erection of conductors can be sub-divided into 4 separate parts as follows:
i. Transport of conductors to work site.
ii. Paving and stringing of conductors.
iii. Tensioning and sagging of conductors.
iv. Joining of conductors.
At the important crossing of roads, canals, navigable rivers, railways etc., flagmen should be
in attendance to ensure that normal services are not unduly interrupted. These crossing
should only be carried out in conjunction with and with the approval of the proper
authorities concerned.
The conductor drums shall be transported to the tension point without injuring the
conductor, if, it is necessary to roll the drum on the ground for a small distance, it should be
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slowly rolled in the direction of the marked on the drum. The drum should be so supported
that it can be rotated freely. For this purpose the drum should either be mounted on the cable
drum supports of jacks or hung by means of chain pulley of suitable capacity, suspended
from a tripod. In case if it is not possible to raise the conductor drum by any of the above
method, a trench of suitable depth slightly bigger than the conductor drum may be dug, so as
to facilitate free rotation of the cable drum when it is suspended in the trench by means of
M.S. Shaft. While paving, care should be taken to see that conductor does not rub against
any metallic fitting of the pole or on the bad/rocky ground. Wooden trusses should be used
for this purpose to support the conductor. The conductor should be passed over the poles on
wooden or aluminum snatch pulley blocks provided with low friction bearings. While
conductor is being paved out slowly, some braking arrangement should be made so that the
rotation of the drum may be stopped in emergency.
In case the length of one piece of the conductor is less than the length of the section in
which conductor paving is being done, it is easy to stretch one length of all phases from one
end the remaining length from another end of the section any part of the conductor shall be
left at a height of less than that of 5 meters, above the ground by rough sagging.
11.4 Mid Span Jointing of Conductors
The mid span jointing of conductors can be carried by twisting the joint at the ends and the
wire should project a few centimeter, beyond the end of the sleeves. The projected wires are
given a sharp bend to keep them from slipping out of the sleeve. The end of the sleeves are
then held tightly by twisting wrenches and then 4 to 5 turns in one direction generally anti-
clock wise direction. Crimping Tools are preferably to be used for joints and jumpers.
11.5 SAGGING AND TENSIONING
On the completion of the paving of the conductors and making mid span joints if any,
tensioning operations will commence. Temporary guys will have to be provided for both the
anchoring supports in the section where the stringing has to be done. At the tensioning end,
one of the conductors is pulled manually up to a certain point and then come along clamp is
fixed to the conductor to be tensioned. The grip to the come along clamp is attached to
double sleeve pulley block or the pulley lift machine and gradually tensioned.
The conductor should then be sagged in accordance with the sag temperature chart for the
particular conductor and span. The sag should then be adjusted in the middle span of the
section. The sag chart is to be provided. The stretch of the conductor has to be taken out
before stringing in order to avoid the gradual increase in sag due to the setting down of the
individual wires. There are ways of accomplishing this:
a) Pre-stressing
In this method the conductor is pulled up to tension considerably above the correct figures,
but never exceeding 50% of breaking load for a short period of say twenty minutes. As this
method requires more time and involves the use of stronger tackle to secure the higher
tension the other method of over tensioning is commonly adopted.
b) Over-tensioning
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This method consists of pulling up the conductor to a tension a little above the theoretical
tension for prevailing temperature and fixed it up at that tension with correspondingly
reduced sag. After a certain time the conductor will settle down to the correct sag and
tension. A tension of five to eight percent more than the theoretical value has been found to
be suitable for the sizes of ACSR and AAAC conductors standardized by REC. The ambient
temperature during sagging may be recorded correctly.
Conductors can be sagged correctly only when the tension is the same in each span
throughout the entire length of section. Use of snatch blocks reduces the friction and
chances of inequality of tension in various spans.
Sagging can be accomplished by several different methods but most commonly used method
is “Slighting”. The slighting sag method of measuring sag is by the use of targets placed on
the supports below the cross arms. The targets may be light strip of wood clamped to the
pole at a distance equal to the sag below the conductor when the conductor is placed in
snatch block. The lineman sees the sag from the next pole. The tension of the conductor is
then reduced or increased, until the lowest part of the conductor in the span coincides with
the lineman’s line of sight.
When sagging is completed, the tension clamps shall be fixed. The clamp can be fitted on
the conductor without releasing the tension. A mark is made on the conductor at a distance
from the cross-arm equal to the length of complete strain insulator. Before the insulator set
is raised to position, all nuts should be free. Come along clamp is placed on the conductor
beyond the conductor clamp and attached to the pulling unit. The conductor is pulled in
sufficiently to allow the insulator assembly to be fitted to the clamp. After the conductor is
clamped to insulator, assembly unit may be released gradually.
If the tension is released with a jerk, an abnormal stress may be transferred to conductor and
support, which may result in the failure of the cross arm, stay or pole in some cases. After
the stringing is completed, all poles, cross arms, insulators, fittings etc. are checked upto
ensure that there have been no deformities etc.
The next step is to place the conductor on the top of the pin insulator from the snatch block
and removing snatch blocks. Conductors are then fastened to insulator by the use of
aluminum wires. The following points should be observed:
i) Proper size of the tie binding wire which can be readily handled and with adequate
strength is to be used.
ii) The length of tie wire should be sufficiently long for making complete tie including
the end allowances for gripping with ends.
iii) A good tie should provide a secure binding between the line conductor and insulator
and should reinforce the conductor on either side of the insulator.
iv) The use of cutting pliers for binding the tie wire should be avoided.
v) The tie wire which has been used previously should be reused
Before tying the conductor to the insulator two layers of Aluminum tapes should be wrapped
over the conductor in the portion where it touches the insulator. The width and thickness of
aluminum tape to be used for a specific size of conductors has been specified in hand books
of aluminum conductor manufacturers and the same be referred to. The Aluminum tapes
should also be used at the tension clamp and for proper grip.
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Normally in straight runs of line, the conductors are run on the top of insulators. When there
is small of deviation the conductor is placed inside groove and bound. Accordingly, there
are two methods of tying the conductors to insulators. The binding wire/tie wire has to be
procured by the contractor and the bid price shall include the cost of this.
11.6 The contractor shall be entirely responsible for any damage to the supports, other
accessories and conductor. He shall also be responsible for proper distribution of the
conductor drums to keep number and lengths of cut pieces of the conductor to a minimum.
11.7 CONDUCTOR DAMAGE AND REPAIR
If the conductor is damaged for whatever reasons, and damage is not repaired by aluminum
sleeves, etc., it shall be brought to the notice of the Engineer and shall not be used without
his approval. Even repairing of conductor surfaces shall be done only in case of minor
damages, scuff marks etc., which are safe from both electrical and mechanical points of
view. The final; conductor surface shall be clean, smooth, without any projection sharp
points, cut or abrasion etc. giving satisfactory corona and R.I. performance.
11.8 No joints or splice be made in span’s crossing over main roads, railways, small rivers or
intension spans. Not more than one joint per conductor shall be allowed in one span. The
strength of the joint shall conform to IE Rule 75.
11.9 STRINGING.
Whatever necessary ground clearances have to be measured to ensure obtaining adequate line
clearance as per IE Rule 77 (i)
12.0 EARTHING
12.1 Pipe Earthing
At D.P Locations, Pits are to be excavated the steel and metal parts are to be earthed by pipe
earthing as per the drawing or sketch enclosed to this specification. Duly filling the pits with
finely broken coke having granule sizes not more than 25 mm thick. The coke shall be
maintained up to a distance of 300 mm for the pipe on all sides. The top edge of the pipe
shall be at least 200 mm below the ground level. The CI strips shall be fixed not less than
300 mm deep from the ground level.
The tenders shall quote the charges for earthing inclusive of the cost of coke, excavation and
back filling.
12.2 Pole Earthing: Supports shall be properly earthed.
13.0 CONCRETING
13.1 The cement concrete used for the foundations shall be of M 400 grade.
13.2 The full concreting for the poles if erected in excavated act shall be done so
that the complete block will be of dimensions( 0.6 X 0.6 X 1.6) + 0.2 X 0.2
Mtr. (0.6 X 0.6 X 1/35) + 0.2 X 0.2 X 0.2 Mtrs. so as to maintain as exposed
portion for 0.2 Mtrs height above the ground level.
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13.3 If augur is used for making pole pits, ramming shall be done after erection of
pole.
14.0 WORKMANSHIP
The contractor shall entirely be responsible for correct erection of all support as per the
approved drawings, and their correct setting and alignment, as approved by the engineer. If
the supports and D.P. structures after the erection are found to differ from approved route
maps and drawings or to be out of alignment, the contractor shall dismantle and re-erect
them correctly at his own cost without extension of time. The supports must be truly vertical
and in plumb after erection and no straining will be permitted to bring them to vertical
position. Verticality of each support shall be measured by the contractor and furnished to the
Engineer.
15.0. Location numbers for each pole shall be painted on the pole.
Anti-climbing devices, and danger boards are to be provided at all railway crossings and
road crossings. No extra charges shall be admissible even though separate gangs may have
to be sent by the contractor for fitting these accessories and attachments on the support at the
appropriate time.
16.0. FINAL CHECKING, TESTING AND COMMISSIONING
After the completion of the work final patrolling and checking of the line shall be done by
the contractor to ensure that all foundations work, pole erection and stringing have been
done as approved by the Engineer, and also to ensure that they are completed in all respects.
Contractor shall prepare pole schedules and hand it over to the Engineer. All works shall be
thoroughly inspected keeping in view of the following main points.
i) Sufficient back filled earth is lying over each foundation pit and it is adequately
compacted.
ii) Concreting and coping of poles are in good and finally shaped conditions.
iii) All the accessories and insulators are strictly as per drawings and are free from any
defects or damages, what-so-ever.
iv) All the bolts and nuts should be of G.I material and as per contractual provisions.
v) The stringing on the conductor has been done as per approved sag and desired
clearances are available.
vi) No damage, minor or major to the conductor, earth wire, accessories and insulator
strings still unattended are noticed.
vii) For all points double jumpers shall be provided to each phase. The jumpers provided
at the cut points are connected rigidly to the tension hardware utilizing all the
jointing bolts provided for the purpose.
The contractor shall submit a report to the above effect to the Engineer. In case, it is noticed
later that some or any of the above are not fulfilled the Engineer will get such items rectified
through other agencies and recover the cost of such works from the bills payable to the
contractor against that contract or any other contract executed by him for APDCL(CAZ).
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After final checking, the lines shall be tested for insulation in accordance with tests
prescribed by the Engineer. All arrangements for such testing or any other tests desired by
the Engineer shall be done by the Contractor and necessary labour, transport and equipment
shall be provided by him. Any defects found out as a result of such tests, shall be rectified
by the Contractor, forthwith, without any extra charges to APDCL(CAZ).
In addition to the above, the Contractor shall be responsible for testing and ensuring that the
total and relative sags of the conductors are within the specified tolerance. Such tests shall
be carried out at selected points along the route as required by the Engineer and the
Contractor shall provide all necessary equipment and labour to enable the tests to be carried
out.
The APDCL(CAR) will arrange statutory inspection of the line and indicate the defects
noticed. The Contractor has to rectify all such defects and intimate to APDCL(CAR)
Engineer.
After satisfactory tests on the line and an approval by the Engineer the line shall be
energized at full operating voltage before handing over.
17.0. SUPPLY OF CONSTRUCTION MATERIALS BY THE CONTRACTOR
The Contractor has to make his own arrangements for procurement, supply and use of
construction materials like cement, M.S. rounds, HBG metal and sand.
17.1. CEMENT
The contractor has to make his own arrangements for the procurement of cement to require
specifications required for the work subjected to the follows:
a) The contractor shall procure cement, required for the works only from reputed cement
factories (Man producer) acceptable to the Engineer-in-Charge. The contractor shall be
required to be furnished to the Engineer-in –Charge bills of payment and test certificates
issued by the manufacturers to authenticate procurement of quality cement from the
approved cement factory. The contractor shall make his own arrangement for adequate
storage of cement.
b) The contractor shall procure cement in standard packing of all 50 kg per bag from the
authorized manufactures. The contactor shall make necessary arrangement at his own cost to
the satisfaction of Engineer-in-Charge for actual weighment of random sample from the
available stock and shall conform to the specification laid down by the Indian Standard
Institution or other standard foreign institutions as the case may be. Cement shall be got
tested for all the tests as directed by Engineer-in-Charge at least one month in advance
before the use of cement hags brought and kept on site Godown. Cement bags required for
testing shall be supplied by the contractor free of cost. However, the testing charges for
cement will be borne by the APDCL(CAR). If the tests prove unsatisfactorily, then the
charges for cement will be borne by the contractor.
c) The contractor should store the cement of 60 days requirement at least one month in
advance to ensure the quality of cement so brought to site and shall not remove the same
without the written permission of the Engineer-in-Charge.
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The contractor shall forthwith remove from the works area any cement that the Engineer-in-
Charge may disallow for use, an account of failure to meet with required quality and
standard.
d) The contractor shall further, at all times satisfy the Engineer-in-Charge on demand, by
production of records and books or by submission of returns and other proofs as directed,
that the cement is being used as rested and approved by Engineer-in-Charge for the purpose
and the contractor shall at all times, keep his records upto date to enable the Engineer-in-
Charge to apply such checks as he may desire.
e) Cement which has been unduly long in storage with the contractor or alternatively has
deteriorated due to inadequate storage and thus become unfit for use in the works will be
rejected by the department and no claim will be entertained. The contractor shall forthwith
remove from the work area, any cement the Engineer-in-Charge may disallow for use on
work and replace it by cement complying with the relevant Indian Standards.
17.2. STEEL
The contractor shall procure mild steel reinforcement bars, high yield strength
deformed(HYSD) bars, rods and structural steel etc. required for the works only from the
main or secondary producers manufacturing steel to the prescribed specifications of Bureau
of Indian Standards or equivalent and licensed to affix ISI or other equivalent certification
marks and acceptable to the Engineer-in-Charge. Necessary ISI list certificates are to be
produced to Engineer-in-Charge before use on works. The unit weight and dimensions shall
be as prescribed in the relevant Indian Standard specification for steel.
18.0. INFORMATION AND DATA
a) The information furnished is the best available however, the APDCL(CAR) does not
guarantee the correctness of interpretations, deductions or conclusions which are given
as supplementary information in the Bid Documents or in any reports, maps, drawings,
diagrams or in other reference information available to the bidder from APDCL(CAR)
of or otherwise.
The information has been produced as found, communicated to ascertained or
otherwise/learned by the APDCL(CAR).
b) it will be the Bidder’s responsibility to satisfy himself from the “Reference Information”
supplied and or inspection of the site that sufficient quantities of construction materials
required for the works shall exist in the designated borrow areas or quarry sites.
The APDCL(CAR) does not accept any responsibility either in handing over the quarries
or procuring the materials or any other facilities. The Tenderer will not be entitled for
any extra rate or claim for the misjudgment on his part for the quantity and quality of
materials available in the quarries.
Failure by the Bidder to have done all the timings which is in accordance with this
condition he is deemed to have done shall not relieve the successful Bidder of the
responsibility for satisfactorily completing the work as required at the rates quoted by
him.
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2.0 TECHNICAL SPECIFICATION FOR POLES OF : 33 KV, 11 KV, AND L T
OVERHEAD POWER LINES
1.0 SCOPE
This covers supply of poles, insurance, storage, erection and commissioning of poles.
1.1 STEEL TUBULAR POLE
SP-76, 14.50 metre length seamless straight( Sweged type) tubular pole manufacturing out
form the electrically welded pipe in three sections having base plate of size 400mm x 400
mm x 10mm at the bottom of the pole and pole cap at the top of the pole. The inner side and
outer underground portion of the pole is to be painted black bituminous paint. The balance
outer portion of the pole(i.e. 12.00 mtr) is to be painted with 2 coats of metal primer and 2
coats of aluminium paint.
The pole is erected in 1:2:4 RCC foundation of size 2.50m x50 cm x50 cm having a PCC base
foundation of size 15 cm x 60 cm x 60 cm including edge brick soling and plastering above
G.L. portion complete with excavation of trances, handling of surplus soil, debris etc. to the
proper place and refilling etc. as specified and directed by the department.
COMPRISING OF FOLLOWING SPECIFICATION OF POLE
Specification:
a) IS-2713( Part-II) 1980 or amended from time to time .
b) Type-410 SP-76.
c) Size of section.
d) Weight of pole with base plate and arim= 380 Kg( Approx.)
e) Planting depth= 2.00 mtr.
Dia Thickness Length of Section
219.10 mm 5.90 mm 6.50 mtr( bottom)
193.70 mm 4.85 mm 4.00 mtr( Middle)
165.10 mm 4.50 mm 4.00 mtr( Top)
f) Type-410 SP-66.
g) Size of section.
h) Weight of pole with base plate and arim= 322 Kg( Approx.)
i) Planting depth= 2.00 mtr.
Dia Thickness Length of Section
219.10 mm 5.90 mm 5.8 mtr( bottom)
193.70 mm 4.85 mm 3.10 mtr( Middle)
165.10 mm 4.50 mm 3.10 mtr( Top)
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Pole Clamp
The pole clamp is to made from MS Flat of size 40mm x 6 mm with necessary drilling of
holes and painting with primer and anti-corrosive aluminium paint suitable for steel tubular
pole of Size SP-76 & SP-66.
Nuts & Bolts & Ring washer
The MS Nuts and Bolts and washer should be of different sizes as require in site.
PCC POLES
2.1 SCOPE
This covers design manufacturing, testing at works, transport to site, insurance, storage, erection and
commissioning of PCC poles shall be of solid rectangular and Virendeel type with an overall length
of 7.5M, 8.50M, 9.75M and suitable for use in overhead 33KV and11 KV lines, L T lines and
double pole structures for 11/0.433 kV substations.
2.2 Applicable Standards
Except when they conflict with specific requirements in this Specific ht: 8nm, the psc poles shall
comply with the relevant provisions mentioned' in the' following Indian Standards or the latest
versions thereof.
a) IS: 1678, Specification for pre-stressed concrete poles for overhead power, traction and
telecommunication lines.
b) IS: 2905, Method of test for concrete poles for overhead power and telecommunication lines.
c) IS: 7321, Code of Practice for selection, handling and erection of concrete poles for overhead power
and telecommunication lines.
2.3 Terminology
.3.1. For the purpose of this specification, following definitions shall apply:
.3.1.1. Average Permanent Load
That fraction of the working load which may be considered of long duration over a period of one
year.
.3.1.2. Load Factor
The ratio of ultimate transverse load to the transverse load at first crack.
.3.1.3. Transverse
The direction of the line bisecting the angle contained by the conductor at the pole. In the case
of a straight run, this will be normal to the run of the line.
.3.1.4. Transverse Load at First Crack
For design, the transverse load at first crack shall be taken as not less than the value of the
working load.
.3.1.5. Working Load
The maximum load in the transverse direction, that is ever likely to occur, including the wind
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pressure on the pole. This load is assumed to act at a point· 600 mm below the top with the butt
end of the pole planted to the required depth as intended in the design.
.3.1.6. Ultimate Failure
The condition existing when the pole ceases to sustain a load incrementowing to either crushing
of concrete, or snapping of the pre-stressing tendon or permanent stretching of the steel in any
part of the pole.
.3.1.7. Ultimate Transverse Load
The load at which failure occurs, when it is applied at a point 600 mm below the top and
perpendicular to the axis of the pole along the transverse direction with the butt end of the pole
planted to the required depth as intended in the design.
2.4 Application
2.4.1 7.5 M and 8.50 M Poles
These poles shall be used at tangent locations for L T lines in wind pressure zones of 50 kg/M2, 75
kg/M2 and 100 kg/M
2 in accordance with REC Construction Standards referred to in the following
table:
Pole Length Line Description Reference to REC
Construction Standard
7.5 M LT lines, Horizontal formation A-4, B-5
8.0 M LT lines, Vertical formation A-5, B-6
The maximum permissible spans shall be as per REC Construction Standard B 8 (for L T lines).
2.4.2 9.75 M
These poles shall be used for 33 kV lines, and for special locations in 11 kV lines, such as road
crossings, etc.
2.4.3 For use in cyclone affected Coastal areas, or in areas with higher wind pressures than indicated in
Clause 2.4.2, special designs of poles would have to be evolved for such areas.
2.5 Material
2.5.1 Cement
The cement used in the manufacture of pre-stressed concrete poles shall be ordinary or rapid
hardening Portland cement conforming to IS: 269 (Specification for ordinary and low heat Portland
cement) or IS: 8041 E (Specification for rapid hardening Portland cement), or high strength ordinary
Portland cement conforming to IS: 8112 (Specification of high strength ordinary Portland cement).
2.5.2 Aggregates
Aggregates used for the manufacture of pre-stressed concrete poles shall confirm to IS: 383
(Specification for coarse and fine aggregates from natural sources for concrete). The nominal
maximum size of aggregates shall in no case exceed 10 mm (for poles above 9.0 M) and 12 mm (for
7.5 and 8.0 M poles).
2.5.3 Water
Water should be free from chlorides, sulphates, other salts and organic matter, Potable water will be
generally suitable.
2.5.4 Admixture
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Admixture should not contain Calcium Chloride or other chlorides and salts which are likely to
promote corrosion of pre-stressing steel.
2.5.5 Pre-stressing Steel
,
The pre-stressing steel wires including those used as un-tensioned wires (See
Annexure. I, II & III), should conform to IS: 1785 (part-I) (Specification for plain hard-drawn steel
wire for pre-stressed concrete. Part-I cold drawn stress relieved wire), IS: 1785 (part-II)
(Specification for plain hard-drawn steel wire) or IS: 6003 (Specification for indented wire for pre-
stressed concrete). The type designs given in Annexure-I, II and III are for plain wires of 4 mm
diameter with a guaranteed ultimate strength of 175 kg/mm2.
2.5.6 The concrete mix shall be designed to the requirements laid down for controlled concrete (also called
design mix concrete) in IS: 1343 (Code of practice for pre-stressed concrete) and IS: 456 (Code of
practice for plain and reinforced concrete), subject to the following special conditions:
a) Maximum works cube strength at 28 days should be at least 400 kg/cm2 (for poles above 9.0 M) and
420 kg/cm2 (for 7.5 and 8.0 M poles).
b) The concrete strength at transfer should be at least 200 kg/cm2 (for poles above 9.0 M) ·and 210 kg/cm
2
(for 7.5 and 8.0 M poles).
c) The mix should' contain at least 380 kg of cement per cubic meter of concrete.
d) The mix should contain as Iowa water content as is consistent with adequate workability. If it
becomes necessary to add water to increase the workability, the cement content also should be raised
in such a way that the original value of water cement ratio is maintained.
2.6 DESIGN REQUIREMENTS
The poles shall be designed for the following requirements:
a) The poles shall be planted directly in the ground with a planting depth as per IS: 1678.
b) The working load on the poles should correspond to those that are likely to come on the pole
during their service life. Designs given in Annexure I,ll and III are for 140 kg, 200 kg, 300 kg,
and 400 kg., applied at 0.6 M from top.
c) The factor of safety for all poles above 9.0 M shall not be less than 2.0. For 7.5 M and 8.5 M
poles, the factor of safety shall not be less than 2.5.
d) The average permanent load shall be 40% of the working load.
e) The F.O.S. against first load shall be 1.0.
f) At average permanent load, permissible tensile stress in concrete shall be 30 kg/cm2.
g) At the design value of first crack load, the modulus of rupture shall not exceed 53.0 kg/cm2 for
M-400 concrete and 55.2 kg/cm2 for M-420 concrete.
h) At the design value of first crack load, the modulus of rupture shall not exceed 53.0 kg/cm2 for
M-400 concrete.
i) The ultimate moment capacity in the longitudinal direction should be at least one fourth of that il1
the transverse direction.
j) The maximum compressive stress in concrete at the time of transfer of pre-stress should not exceed
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0.8 times the cube strength.
k) The concrete strength at transfer shall not be less than half the 28 days strength ensured in the
design, i.e., 400 x 0.5 = 200 kg/cm2 or 420 x 0.5 = 210 kg/cm
2.
2.6.1 Service Conditions
PSCC poles have to be designed to suit the following climatic conditions:
a) Maximum temperature of air in shade 40°C
b) Minimum temperature of air in shade 2°C
c) Maximum temperature of air in sun 45°C
d) Maximum humidity 93%
e) Average number of thunder storm days per 45 Days
annum
f) Maximum rainfall per annum 3500 mm
g) Average rainfall per annum 2200 mm
h) Wind pressure 97.8 Kg/m2
i) Altitude above MSL 100 M to 1000 M
2.6.2 Dimensions and Reinforcements
The cross-sectional dimensions and the details of pre-stressing wires should conform to the
particulars given in Annexure-I, II and III.
The provisions of holes for fixing cross-arms and other fixtures should conform to the REC
standards referred to in clause 3.3 of this specification.
2.0.3 Manufacture
2.0.3.1 Attire--stressing wires and reinforcements shall be accurately fixed as shown in drawings and
maintained in position during manufacture. The un-tensioned reinforcement, as indicated in the
drawings, should be held in position by the use of stirrups which should go round all the wires.
2.6.3.2 AII wires shall be accurately stretched with uniform pre-stress in each wire. Each wire or a group of
wires shall be anchored positively during casing. Care should be taken to see that the anchorages do
not yield before the concrete attains the necessary strength.
2.6.4. Cover
The cover of concretE1 measured from the outside of pre-stressing tendon shall be normally 20 Nm.
2.6.5. Welding and Lapping of Steel
The high tensile steel wire shall be continuous over the entire length of the tendon. Welding shall not
be allowed in any case. However, jointing or coupling may be permitted provided the strength of the
joint or coupling is not less than the strength of each individual wire.
2.6.6. Compacting
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Concrete shall be compacted by spinning, vibrating, shocking or other suitable mechanical means.
Hand compaction shall not be permitted.
2.6.7. Curing
The concrete shall be covered with a layer of sacking, canvass, Hessian or similar absorbent
material and kept constantly wet up to the time when the strength of concrete is at least equal to the
minimum strength of concrete at transfer of pre-stress. Thereafter, the pole may be removed from
the mould and watered at intervals to prevent surface cracking of the unit, the interval should
depend on the atmospheric humidity and temperature.
The pre-stressing wires shall be detensioned only after the concrete has attained the specified
strength at transfer (i.e., 200 or 210 kg/cm2 as applicable). The cubes cast for the purpose of
determining the strength at transfer should be cured, as far as possible, under conditions similar to
those under which the poles are cured. The transfer stage shall be determined based on the daily
tests carried out on concrete cubes till the specified strength indicated above is reached. Thereafter
the test on concrete shall be carried out as detailed in IS: 1343 (Code of pr3ctice for pre-stressed
concrete). The manufacturer shall supply, when required by the owner or his representative, result of
compressive test conducted in accordance with IS: 456 (Code of practice for plain and reinforced
concrete) on concrete cubes made from the concrete used for the poles. If the owner so desired, the
manufacturer shall supply cubes for test purposes and such cubes shall be tested in accordance with
IS: 456 (Code of practice for plain and reinforced concrete).
The detensioning shall be done by slowly releasing the wires, without imparting shock or sudden
load to the poles. The rate of detensioning may be controlled by any suitable means either
mechanical (screw type) or hydraulic.
The poles shall not be detensioned or released by cutting the pre-stressing wires using flames or bar
croppers while the wires are still under tension.
2.6.8. Separate eye-hooks or holes shall be provided for handling the transport, one each at a distance
of 0.15 times the overall length, from either end of the pole. Eye-hooks, if provided, should be
properly anchored and should be on the face that has the shorter dimension of the cross-section.
Holes, if provided for lifting purposes, should be perpendicular to the broad face of the pole.
Stacking should be done in such a manner that the broad side of the pole is vertical. Each tier in
the stack should be supported on timber sleeper located as 0.15 times the overall length,
measured from the end. The timber supported in the stack should be aligned in a vertical line.
Poles should be transported with their broad faces placed vertically and, in such a manner that
the shocks are avoided. Supports should be so arranged that they are located approximately at a
distance equal to 0.15 times the overall length from the ends. The erection of the pole should be
carried out in such a way that the erection loads are applied so as to cause moment with respect
to the major axis, i.e., the rope used for hoisting the pole should be parallel to the broader face
of the pole.
2.6.9. Earthing
2.6.9.1 Earthing shall be provided by having length of 8 SWG GI wire embedded in concrete during
manufacture and the ends of the wires left projecting from the pole to a length of 100 mm at 250
mm from top and 150 mm below ground level.
2.6.9.2 Earth wire shall not be allowed to come in contract with the pre-stressing wires.
2.7 Tests
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2.7.1 Transverse Strength Test
2.7.1.1 Poles made from ordinary Portland cement shall be tested only on the completion of 28 days
and poles made from rapid hardening cement only on the completion of 14 days, after the day of
manufacture.
2.7.1.2 The poles may be tested in either horizontal or vertical position. If tested in horizontal position,
provisions shall be made to compensate for the overhanging weight of the pole, for this
purposed, the overhanging portion of the pole may be supported on a movable trolley or similar
device.
2.7.1.3 The pole shall be rigidly supported at the butt end for a distance equal to the agreed depth of
planting. 2.7.1.4 Load shall be applied at a point 600 mm from the top of the pole and shall be steadily and gradually
increased to the design value of the transverse load at first crack. The deflection at this load shall be
measured.
A pre-stressed concrete pole shall be deemed not to have passed the test if visible cracks appear at a
stage prior to the application of the design transverse load for the first crack.
The load then be reduced to zero and increased gradually to a load equal to the first crack load plus
10% of the minimum ultimate transverse load, and held up for 2 minutes. This procedure shall be
repeated until the load reaches the value of 80 per cent of the minimum ultimate transverse load and
thereafter increased by 5 per cent of the minimum ultimate transverse load until failure occurs. Each
time the load is applied, it shall be held for 2 minutes. The load applied to pre-stressed concrete pole
at the point of failure shall be measured to the nearest five Kilograms.
The pole shall be deemed not to have passed the test if the observed ultimate transverse load is less
than the design ultimate transverse load.
2.7.1.5 Measurement of Cover
After completion of the transverse strength test, the sample pole shall be taken and checked for
cover. The cover of the pole shall be measured at 3 points, one within 1.8 meter from the butt end of
the pole. the ·second within 0.6 meters from the top and the third at an intermediate point and the
mean value compared with the specified value.
The mean value of the measured cover should not differ by more than (±) 1 mrn from the specified
cover. The individual values should ;Jot jiffer by more than (±) 3 mm from the specified value.
If these requirements are not met, the workmanship with reference to aligning of the end plates and
pre-stressing wires and assembly of moulds should be improved and inspection at pre-production
stage tightened suitably.
3.0 MARKING
The pole shall be clearly and indelibly marked with the following particulars either during or after
manufacture but before testing at a position so as to be easily read after erection in position.
a) Month and year of manufacture
b)Transverse strength of pole in Kg
4.0 INSPECTION
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Notice Inviting Tender APDCL
Inspection may be carried out by the purchaser or third party nominee at any stage of
manufacture. The supplier shall grant free access to the purchaser's representative or third party
nominee at a reasonable time when the work is in progress. Inspection and acceptance of any
equipment under this specification by the purchaser shall not relieve the supplier of his
obligation of furnishing equipment in accordance with the specification and shall not prevent
subsequent rejection if the equipment is found defective.
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Notice Inviting Tender APDCL
ECONOMICAL DESIGN FOR VIRENDEEL TYPE PRESTRESSED CONCRETE POLES
Factor of safety = 2.5 Diameter of Prestressing Wires = 4 mm
Cost Ratio = 11 With a Minimum Ultimate Tensile Strength of 175 Kg/mm Sq.
Concrete Grade = M-420
Length
of Pole
Load Bottom
Depth
Breadth Top
Depth
No. of
Tensioned
Wires per
Pole
No. of
Untensioned
Wires per
Pole
Length of
each
Untensioned
Wire
Concrete
Quantity
Concrete
Quantity
Steel
Quantity
(L) (P) (dt) (B) (lc) Cubic M Kg/Pole
M Kg Cm
I 2 3 4 5 6 7 8 9 10
7.5 140 25.5 10.5 8.5 8 2 4.55 0.115 6.81
200 27.5 14.5 8.5 12 2 3.75 0.134 9.61
8.0 140 27.5 10.5 9 8 2 4.7 0.137 7.24
200 29 14.5 9.0 12 2 3.95 0.157 10.25
9.0 140 27 10.5 10 10 2 4.5 0.169 9.76
200 31.5 11.5 10.5 12 2 4.45 0.203 11.54
Note: 1. Untensioned wires of the given length should be placed at the bottom of the pole
Cost of one MT of pre-stressing steel
2.Cost ration =
Cost of one cubic m of concrete
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Notice Inviting Tender APDCL
ECONOMICAL DESIGN FOR VIRENDEEL TYPE PRESTRESSED CONCRETE POLES
Factor of safety = 2.0 Nos. of Windows = 4
Cost Ratio = 11
Concrete Grade = M-400
Sl.No
Overall
Length
of Pole
Bottom
Depth
Top
Depth Breadth
Thicknes
s
Thickn
ess
Diamete
r of Pre-
stressing
wires
No. of
Tensione
d Wires
per Pole
No. of
Untensio
ned
Wires
per Pole
Length
of Each
Untensi
oned
Wires
Concrete
Quantity
Steel
Quantity
Weight
Kg/Pole
M Kg Cm Cm Cm Cm M M/Pole Kg/Pole Kg/Pole
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 9.75 300 39.5 11.0 12.5 7.0 5 8 2 5.62 0.205 12.82 490
2 9.75 400 48.0 11.0 14.5 7.0 5 ,8 2 6.45 0.255 13.06 610
3 9.5 200 37.5 10.5 12.5 6.5 5 8 2 6.53 0.208 8.78 500
4 9.5 300 41.0 11.0 12.5 7.0 5 8 2 6.14 0.225 13.60 540
5 9.5 400 50.0 11.0 15.0 7.0 5 8 2 6.96 0.291 13.85 700
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Notice Inviting Tender APDCL
ECONOMICAL DESIGN FOR SOLID RECTEANGULAR TYPE PRESTRESSED CONCRETE POLES
Factor of safety = 2.0
Cost Ratio = 11
Concrete Grade = M-400
Sl.No
Overall
Length
of Pole
Bottom
Depth
Top
Depth Breadth Thickness
Diameter of
Pre-stressing
wires
No. of
Tensione
d Wires
per Pole
Concrete
Quantity
Steel
Quantity
Weight
Kg/Pole
M Kg Cm Cm Cm M/Pole Kg/Pole Kg/Pole
1 2 3 4 5 6 7 8 9 10 11
1 9.0 200 31.5 14.5 8.5 4 12 0.176 10.65 425
2 9.0 300 35.5 18.5 10.0 4 16 0.243 14.20 585
3 9.0 400 39.5 22.5 10.0 4 20 0.279 17.76 670
4 9.5 200 31.5 14.5 10.0 4 12 0.218 11.25 525
5 9.5 300 36.5 18.5 10.0 4 16 0.261 14.99 625
6 9.5 400 40.5 22.5 10.0 4 20 0.299 18.74 720
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3.0 TECHNICAL SPECIFICATION FOR 33 KV & 11 KV PIN
INSULATORS
1.0 SCOPE
This specification covers the design, manufacture, testing at manufacturer's works,
transport to site, insurance, storage, erection and commissioning of insulators required
for 33 kV & 11 kV lines.
1.0 STANDARD
The pin insulators shall comply with the Indian Standard specification IS : 731/1971 as amended
from time to time having mechanical failing load of 10 K.N for 33 kV insulator and 5 kN for 11
kV insulator.
Insulators conforming to any other internationally accreted standards which ensure equal or
higher quality than the standard mentioned would also be acceptable.
Where the material is offered according to the inter-national standard a copy of the specification
shall be attached with the tender.
2.1 General requirement: The porcelain should be sound, free from defects, thoroughly vitrified and
smoothly glazed.
2.2 Unless otherwise specified, the glaze shall be brown colour. The glaze shall cover all the
porcelain parts of the insulators except those areas which serve as support during firing or are left
unglazed for purpose of assembly.
2.3 The design of the insulator shall be such that stress due to expansion and contraction in any part of
the insulator shall not lead to deterioration. The porcelain shall not engage directly with hard
metal.
2.4 Cement used in the construction of insulator shall not cause fracture by expansion or loosening by
contraction and proper care shall be taken to locate the individual parts correctly during
cementing. The cement shall not give rise to chemical reaction with metal fitting and its thickness
shall be as uniform as possible.
2.5 The insulator shall be multi-petty-coat type.
2.3 CLIMATIC CONDTIONS
a) Maximum temperature of air in shade 40° C
b) Minimum temperature of air in shade 2° C
c) Maximum humidity 93%
d) Average annual rainfall 2280 mm
e) Average number of rainy days per annum 150
f) Basic wind pressure 150 Kg/M2
g) Isoceraumic level 60
h) Altitude above MSL 100 M to 1000 M
2.0 BASIC INSULATION LEVEL
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Notice Inviting Tender APDCL
The test voltage (minimum requirement) of the insulator shall be as follows:
33 KV 11 KV
1. Highest system voltage (rms) 36 KV 12 KV
2. Wet one minute power frequency test(rms) 76 KV 35 KV
3. Power frequency puncture withstand (rms) 180 KV 105 KV
4. Impulse voltage withstand test(Peak) 170 KV 75 KV
5. Dry one minute power frequency test (rms) 95 KV -
6. Power frequency flush and voltage
a) Dry 95 KV -
b) Wet 80 KV -
3.0 MECHANICAL LEADS
The minimum failing load of the insulators shall be 10 KN for 33 kV & 5 kN for 11
kV and the load shall be applied in transverse direction.
4.0 CREEPAGE DISTANCE
The minimum total creepage distance for insulators shall be 580 mm for 33 kV and
320 mm for 11 kV insulators.
5.0 MARKING
Each insulator shall be legibly and indelibly marked to show the following:
1.0 Name or trade mark of the manufacturer
2.0 Month and year of manufacture
3.0 Minimum failing load in KN
4.0 Country of manufacture
5.0 ISI certificate mark, if any
6.0 Name of the Project under .
The marking on porcelain shall be printed and shall be applied before firing.
6.0 Type Tests
\
The following type tests shall be conducted on 'a suitable number of individual
insulator unit, components, materials or complete strings:
a) Verification of dimensions
b) Thermal mechanical performance test
c) Power frequency voltage withstand and flashover test (i) dry (ii) wet
d) Impulse voltage withstand and flashover test (dry)
e) Visible discharge test (dry)
f) RIV test (dry)
g) Mechanical failing Load Test (for pin insulator only)
h) 24 hrs. mechanical strength test (for strain / string insulator only)
7.4 Acceptance Test
i. Visual examination
ii. Verification of dimension
iii. Temperature cycle test
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Notice Inviting Tender APDCL
iv. Galvanizing test
v. Mechanical performance test
vi. Test on locking device for ball and socket coupling
vii. Eccentricity test
viii. Metallurgical test
a) Grain test
b) Inclusion rating For metal fittings only (in black
condition)
c) Chemical analysis
d) Microstructure.
ix. Mechanical failing load test (for Pin Insulator only)
x. Electro-mechanical strength test (for strain insulator only)
xi. Porosity test
xii. Puncture test(for Strain Insulator only)
7.5 ROUTINE TEST
a) Visual Inspection
b) Mechanical routine test (for Strain Insulator only)
c) Electrical routine test (for Strain Insulator only)
7.6 Tests During Manufacture
On all components as applicable
a) Chemical analysis of zinc used for galvanizing
b) Chemical analysis, mechanical, metallographic test and magnetic particle inspection
for malleable castings.
c) Chemical analysis hardness tests and magnetic particle inspection for forgings
d) Hydraulic Internal Pressure tests On disc insulator shells
7.7 SCHEDULE OF TESTING AND ADDITIONAL TESTS 7.7.1 The Bidder has to indicate the schedule of following activities in
their bids: a) Submission of drawings for approval
b) Submission of Quality Assurance Programme for approval
c) Offering of material for sample selection for type tests
d) Type testing.
7.7.2 Additional Tests
7.7.2.1 The Owner reserves the right of having at his own expense any other test(s) or reasonable
nature carried out at Contractor's premises, at site, or in any other place in addition to the
aforesaid type, acceptance and routine tests to satisfy himself that the material comply with
the Specifications.
7.7.2.2 The Owner also reserves the right to conduct all the tests mentioned in this specification at
his own expense on the samples drawn from the site at Contractor's premises or at any other
test center. In case of evidence of noncompliance, it shall be bindirg on the part of the
Contractor to prove the compliance of the items to, the technical specifications by repeat tests
or correction of deficiencies, or replacement of defective items, all without any extra cost to
the Owner.
7.7.3 Co-ordination for Testing
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Notice Inviting Tender APDCL
The Contractor shall have to co-ordinate testing of insulators with hardware fittings to be
supplied by other Contractor and shall have to also guarantee overall satisfactory
performance of the insulators with the hardware fitting.
7.7.4 Test Reports
7.7.4.1 Copies of type test reports shall be furnished in at least six (6) copies along with one
original. One copy shall be returned duly certified by the Owner only after which the
commercial production of the concerned materials shall start.
7.7.4.2 Copies of acceptance test reports shall be furnished in at least six (6) copies. One copy
shall be returned duly certified by the Owner, only after which the material shall be
despatch.
7.7.4.3 Record of routine test reports shall be maintained by the Contractor at his works for
periodic inspection by the Owner's representative.
7.7.4.4 Test certificates of test during manufacture shall be maintained by the Contractor. These
shall be produced for verification as and when desired by the Owner.
7.7.5 Inspection
7.7.5.1 The Owner's representative or third party nominee shall at all times be entitled to have
access to the works and all places of manufacture, where. insulator, and its component
parts shall be manufactured and the representatives shall have full facilities for
unrestricted inspection of the Contractor's and ;1ub-Contractor's works, raw materials,
manufacture of th::; material and for conducting necessary test as detailed herein.
7.7.5.2 The material for final inspection shall be offered by the Contractor only under packed
condition as detailed in the specification. The Owner shall select samples at random
from the packed lot for carrying out acceptance tests. Insulators shall normally be
offered for inspection in lots not exceeding 5000 nos. the lot should be homogeneous
and should contain insulators manufactured in the span of not more than 3-4
consecutive weeks.
7.7.5.3 The Contractor shall keep the Owner informed in advance of the time of starting and
the progress of manufacture of material in their various stages so that arrangements
could be made for inspection.
7.7.5.4 No material shall be dispatched from its point of manufacture before it has been
satisfactorily inspected and tested unless the inspection is waived off by the Owner in
writing. In the latter case also the material shall be dispatched only after satisfactory
testing for all tests specified herein have been completed.
7.7.5.5 The acceptance of any quantity of material shall be no way relieve the Contractor of his
responsibility for meeting all the requirements of the specification and shall not prevent
subsequent rejection, if such material are later found to be defective.
7.0 BID DRAWING
8.0 The Bidder shall furnish full description and illustration of the material offered.
8.1 The Bidder shall furnish along with the bid the outline drawing (6 copies) of each
insulator unit including a cross sectional view of the insulator shell. The drawing shall
include but not limited to the following information:
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Notice Inviting Tender APDCL
a) Dimensions with manufacturing tolerances
b) Minimum creepage distance with positive tolerance
c) Protected creepage distance
d) Eccentricity of the disc
i. Axial run out
ii. Radial run out
e) Unit mechanical and electrical characteristics
f) Size and weight of Pin Ball Shank / ball and socket parts
g) Weight of unit insulator disc
h) Materials
i) Identification mark
j) Manufacturer's catalogue number
8.2 After placement of award, the Contractor shall submit fully dimensioned insulator
drawings containing all the details, in four (4) 'copies to Owner for approval. After
getting approval from Owner and successful completion of all the type tests, the
Contractor shall submit 20 more copies of the same drawing to the Owner for further
distribution and field use at Owner's end.
9.0 Guaranteed Technical Particulars
The guaranteed technical particulars in respect of the Pin Insulators offered shall be
submitted along with the tender.
4.0 TECHNICAL SPECIFICATION FOR 11 KV DISC. INSULATORS (T&C) 45 KN
1.0 SCOPE
This specification cover the design, manufactures, testing at
manufacturer's works, transport to site, insurance, storage, erection and
commissioning of strain insulators required for 11 KV line.
2.0 STANDARD
Strain insulators Tongue and Clevis type suitable for 11 KV lines shall be
conforming to IS : 731/1971 with its latest amendments and revision and
having mechanical failing load of 45 K.N.
Insulators conforming to any other internationally accepted standards which
ensure equal or higher quality than the standard mentioned would also be
acceptable.
Where the material is offered according to the inter-national accepted
standard a copy of the specification shall be attached with the tender.
2.1 GENERAL REQUIREMENT:
The porcelain should be sound, free from defects, thoroughly verified and
smoothly glazed. Unless otherwise specified, the glaze shall be brown colour.
The glaze shall cover all the porcelain parts of the insulators except these areas
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Notice Inviting Tender APDCL
which serve as support during firing or are left unglazed for purpose of .
assembly.
2.2 The design of the insulator shall be such that stress due to expansion and
contraction in any part of the insulator shall not lead to deterioration. The
porcelain shall not engage directly with hard metal.
2.3 The cement use in the construction of insulator shall not cause fracture by
expansion or loosening by contraction and proper care shall be taken to locate
the individual parts correctly during commencing. The cement shall not give
rise to chemical reaction with metal fitting and its thickness shall be as
uniform as possible.
2.4 The insulator shall be multi-petty-coat type.
2.5 The insulator shall be in one piece.
2.6 CLIMATIC CONDITIONS.:
(i) Maximum ambient temperature in shade : 40°C
(ii) Minimum daily average ambient air temperature : 35°C
(iii) Maximum yearly average ambient air temperature : 30°C
(iv) Maximum ambient temperature : 2°C
(v) Maximum relative humidity : 93%
(vi) Average number of thunder storms days per annum : 45 days
(vii) Average number of rainy days per annum : 150 days
(viii) Average annual rainfall : 2280 mm
(ix) Number of months of tropical monsoon conditions : 5 months
(x) Maximum wind pressure : 150 Kg/sq.m
(xi) Altitude not exceeding : 1000 M
4.0 BASIC INSULATION LEVEL
The test voltage (minimum requirement) of the insulator shall be as follows:
a) Highest system voltage : 12 KV(rms)
b) Wet one minute power frequency test : 35 KV(rms)
c) Power frequency puncture withstand test : 1.3 times the actual dry flashover
voltage
d) Impulse voltage withstand test : 75 KV (rms)
5.0 MECHANICAL LOADS
The minimum failing load of the insulators shall be 45 KN and the load shall be applied
transverse.
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Notice Inviting Tender APDCL
6.0 CREEP AGE DISTANCE:
The minimum total creepage distance for insulators shall be suitable for heavily polluted
and humidity atmospheric conditions and shall be 320 mm.
7.0 MARKING
Each insulator shall be legibly and indelibly marked to show the following:
a) Name or trade mark of the manufacturer
b) Month and year of manufacture
c) Minimum failing load in KN
d) Country of manufacture
e) ISI certificate mark and name of the project under "CM."
The marking on porcelain shall be printed and shall be applied before suitably.
8.0 TEST
8.1 Type test
The following type tests shall be conducted on a suitable number of individual insulator
unit, components, materials or complete strings:
1.0 Verification of dimensions
2.0 Thermal mechanical performance test
3.0 Power frequency voltage withstand and flashover test (i) dry (ii) wet
4.0 Impulse voltage withstand and flashover test (dry)
5.0 Visible discharge test (dry)
6.0 RIV test (dry)
7.0 Mechanical failing Load Test (for pin insulator only)
8.0 24 hrs. mechanical strength test (for strain I string insulator only)
8.2 Acceptance Tests
a) Visual examination
b) Verification of dimensions
c) Temperature cycle test
d) Galvanizing test
e) Mechanical performance test
f) Test on locking device for ball and socket coupling
g) Eccentricity test
h) Metallurgical test
(i) Grain size
(ii) Inclusion rating
(iii) Chemical analysis
(iv) Microstructure
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Notice Inviting Tender APDCL
i) Mechanical failing load test (for Pjn Insulator only)
j) Electro-mechanical strength test (for Strain insulator only)
k) Porosity test
l) Puncture test (for strain Insulator only)
8.3 Routine Tests
a. Visual Inspection
b. Mechanical routine test for Strain Insulator only)
c. Electrical routine test (for Strain Insulator only)
7.4 Tests During Manufacture
On all components as applicable
a) Chemical analysis of zinc used for galvanizing
b) Chemical analysis, mechanical, metallographic test and magnetic particle inspection for
malleable castings.
c) Chemical analysis hardness tests and magnetic particle inspection for forgings
d) Hydraulic Internal Pressure tests On disc insulator shells
8.0 SCHEDULE OF TESTING AND ADDITIONAL TESTS
8.1 The Bidder has to indicate the schedule of following activities in their bids:
a. Submission of drawings for approval
b. Submission of Quality Assurance Programme for approval
c. Offering of material for sample selection for type tests
d. Type testing.
8.2 Additional Tests
8.2.1 The Owner reserves the right of having at his own expense any other test(s) or
reasonable nature carried out at Contractor's premises, at site, or in any other place in
addition to the aforesaid type, acceptance and routine tests to satisfy himself that the
material comply with the Specifications.
8.2.2 The Owner also reserves the right to conduct all the tests mentioned in this specification at his
own expense on the samples drawn from the site at Contractor's premises or at any other test
center. In case of evidence of noncompliance, it shall be binding on the part of the Contractor
to prove the compliance of the items to the technical specifications by repeat tests or
correction of deficiencies, or replacement of defective items, all without any extra cost to the
Owner.
8.3 Co-ordination for Testing
The Contractor shall have to co-ordinate testing of insulators with hardware fittings to be
supplied by other Contractor and shall have to also guarantee overall satisfactory
performance of the insulators with the hardware fitting.
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Notice Inviting Tender APDCL
8.4 Test Reports
8.4.1 Copies of type test reports shall be furnished in at least six (6)' copies along with one original.
One copy shall be returned duly certified by the Owner only after which the commercial
production of the concerned materials shall start.
8.4.2 Copies of acceptance test reports shall be furnished in at least six (6) copies. One copy shall
be returned duly certified by the Owner, only after which the material shall be despatch.
8.4.3 Record of routine test reports shall be maintained by the Contractor at his works for periodic
inspection by the Owner's representative.
8.4.4 Test certificates of test during manufacture shall be maintained by the Contractor.These shall
be produced for verification as and 'When desired by the Owner.
9.0 INSPECTION
9.1 The Owner's representative or third party nominee shall at all times be entitled to have access
to the works and all places of manufacture, where insulator, and its component parts shall be
manufactured and the representatives shall have full facilities for unrestricted inspection of the
Contractor's and sub Contractor's works, raw materials, manufacture of the material and for
conducting necessary test as detailed herein.
9.2 The material for final inspection shall be offered by the Contractor only under packed
condition as detailed in the specification. The Owner shall select samples at random from
the packed lot for carrying out acceptance tests. Insulators shall normally be offered for
inspection in lots not exceeding 5000 nos. the lot should be homogeneous and should
contain insulators manufactured in the span of not more than 3-4 consecutive weeks.
9.3 The Contractor shall keep the Owner informed in advance of the time of starting and the
progress of manufacture of material in their various stages so that arrangements could be
made for inspection.
9.4 No material shall be dispatched from. its point of manufacture before it has been
satisfactorily inspected and tested unless the inspection is waived off by the Owner in
writing. In the latter case also the material shall be dispatched only after satisfactory
testing for all tests specified herein have been completed.
9.5 The acceptance of any quantity of material shall be no way relieve the Contractor of his
responsibility for meeting all the requirements of the specification and shall not prevent
subsequent rejection, if such material are later found to be defective.
10.0 DRAWING
9.1 The Bidder shall furnish full description and illustration of the material offered.
9.2 The Bidder shall furnish along with the bid the outline drawing (6 copies) of each
insulator unit including a cross sectional view of the insulator shell. The drawing shall
include but not limited to the following information:
a. Dimensions with manufacturing tolerances
b. Minimum creepage distance with positive tolerance
c. Protected creepage distance
d. Eccentricity of the disc
(i) Axial run out
(ii) Radial run out
e. Unit mechanical and electrical characteristics
f. Size and weight of Pin Ball Shank I ball and socket parts
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g. Weight of unit insulator disc
h. Materials
i. Identification mark
j. Manufacturer's catalogue number
9.3 After placement of award, the Contractor shall submit fully dimensioned insulator
drawings containing all the details, in four (4) copies to Owner for approval. After getting
approval from Owner and successful completion of all the type tests, the Contractor shall
submit 20 more copies of the same drawing to the Owner for further distribution and field
use at Owner's end.
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5.0 TECHNICAL SPECIFICATION OF L T & HT GUY INSULATOR
1.0 Scope
This specification covers design, manufacture, testing, transport to site, insurance,
storage, erection and commissioning of the strain type porcelain Guy Insulator
used in distribution overhead power lines.
1.0 Standard
This insulators shall comply with Indian Standard specification IS: 5500/1969 and as
amended from time to time except where they conflict with the requirements in this
specification.
Offers conforming to any other internationally accepted standard which ensure equal or higher
quality than the standard mentioned will be acceptable.
2.0 Service Conditions
The service conditions at which Insulator has to be designed is as follows:
i) Maximum ambient temperature in shade : 40°C
ii) Minimum daily average ambient air temperature : 35°C
iii) Maximum yearly average ambient air temperature : 30°C
iv) Maximum ambient temperature : 2°C
v) Maximum relative humidity : 93%
vi) Average number of thunder storms days per annum : 45 days
vii) Average number of rainy days per annum : 150 days
viii) Average annual rainfall : 2280 mm
ix) Number of months of tropical monsoon conditions : 5 months
x) Maximum wind pressure : 150 Kg/sq.m
xi) Altitude not exceeding : 1000 M
3.0 General Requirements
This porcelain shall be sound, free from defects, thoroughly vitrified and smooth glazed.
The design of the insulator shall be such that stresses to expansion and contraction at any
part of the insulator shall not load to its deterioration.
The glaze, unless otherwise specified, shall be brown in colour. The glaze shall cover the
entire porcelain surface parts except those areas that serves as supports during firing or area
otherwise required to be left unglazed.
4.0 Insulator Characteristics
The Guy Strain Insulators shall have the electrical and mechanical characteristics as shown
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below:
L.T. Strain Type Porcelain Guy Insulator 1) Length
2) Diameter
3) Cable hole dia'
4) Minimum failing load
5) Creepage distance
6) Dry one minute power frequency withstand voltage
7) Wet one minute power frequency withstand voltage
The dimensions are shown in Figure
H.T. Strain Type Porcelain Guy Insulator (11 KV)
1) Length 140 mm
2) Diameter 85 mm
3) Cable hole dia 25 mm + 1.5
4) Minimum failing load 88 KN
5) Creepage distance 48 mm
6) Dry one minute power frequency withstand 27 KV (rms) voltage
7) Wet one minute power frequency withstand 13 KV (rms) voltage
All other dimensions are shown in the Figure
5.0 Test
All insulators shall comply the following test as per IS : 5300
A) Routine test:
The following shall be carried out as., routine test.
a) Visual Examination
Every insulators shall be visually examined. The insulators shall be free from physical
distortion of shape and defects, and thoroughly verified and smoothly glazed. They
should be free from cracks or any other defects likely to be prejudicial to the
satisfactory performance in service.
b) Type test:
The following shall constitute the type test and those shall be conducted in the order
given below:
i. Visual examination
ii. Verification of dimensions
iii. Temperature cycle test
iv. Dry one minute power frequency voltage withstand test
v. Wet one minute power frequency voltage withstand test
vi. Mechanical strength test
vii. Porosity test.
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The number of samples for type test are to be agreed to between the purchaser and the
supplier.
c) Acceptance Test (to be conducted in the following order)
i. Verification of Dimensions
ii. Temperature cycle test
iii. Mechanical strength test
iv. Porosity test
The number of samples for acceptance test shall be in accordance to IS: 5300.
d) Type test certificate fro National Test House/ Govt. recognized institutions/ Govt.
recognized public Testing Laboratories are also to be submitted along with the
offer, failing which the offer is liable for rejection.
6.0 Marking
Each insulator shall be legibly and indelibly marked to shown the following:
a. Name of trade mark of the manufacturer
b. Year of manufacture and name of project .
Marking on porcelain shall be printed and shall be applied before firing. Insulators may
also be marked with the ISI certification mark.
7.0 Inspection
All tests and inspections shall be carried out at the place of manufacturer unless otherwise
agreed by the purchaser and the manufacturer at the time of purchase. The manufacturer
shall afford the inspector representing the purchaser or the third party nominee, all
reasonable facilities, without charge, to satisfy that materials are being furnished in
accordance with the specification. The purchaser reserves the right to have the test carried
out at his own cost by an independent agency whenever there is dispute regarding the
quality of materials supplied.
8.0 Drawing
Drawing specifically showing all dimensions is to be submitted along with technical bid.
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6.0 TECHNICAL SPECIFICATION FOR L T SHACKLE INSULATOR
1.0 Scope
This specification covers design, manufacture, testing at works, transport to site,
insurance, storage, erection and commissioning of the porcelain shackle insulators for use
on 415/240 volts over-head power lines.
4.0 Standard
The insulators shall comply with the Indian Standard specification IS:14451977 and as
amended from time to time, except for any specific-requirements stated in this
specification.
Offers, conforming to other internationally accepted standard which ensure equal or
higher quality than the standard mentioned will be acceptable.
3.0 Atmospheric Conditions
The climatic conditions under which the insulators are required to operate is given as
below:
(i) Maximum ambient temperature in shade : 40°C
(ii) Minimum daily average ambient air temperature : 35°C
(iii) Maximum yearly average ambient air temperature : 30°C
(iv) Maximum ambient temperature : 2°C
(v) Maximum relative humidity : 93%
(vi) Average number of thunder storms days per annum : 45 days
(vii) Average number of rainy days per annum : 150 days
(viii) Average annual rainfall : 2280 mm
(ix) Number of months of tropical monsoon conditions : 5 months
(x) Maximum wind pressure : 150 Kg/sq.m
(xi) Altitude not exceeding : 1000 M
Reference atmospheric conditions at which insulator characteristics shall be expressed for
the purpose of comparison shall be given as follows:
a. Ambient temperature : 20°C
b. Barometric pressure : 1013 mili bars
c. Absolute humidity : 11 gm to water per cubic mtr.
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Test for the purpose of this standard shall preferably be carried out under
conditions of temperature and humidity specified in IS: 196-1966 (That is a
temperature of 27 C.±. 2°C and relative humidity of 65 .±2 percent) and at the
prevailing atmospheric pressure. When this is not possible test may be carried
out under conditions naturally obtaining at the time of test. The Barometric
pressure, Air temperature and humidity shall be recorded for the purpose of
corrections.
4.0 General Requirements
The porcelain shall be found free from defects, thoroughly verified and
smoothly glazed.
The glaze unless otherwise specified shall' be brown in colour. Except for the --'/-
screw threads and the parts on which the porcelain is supported during firing,
which may be left unglazed, all other surface of the insulator shall be effectively
glazed.
The design of the insulator shall be such that stress due to expansion and
contraction in any parts of the insulator shall not lead to it deterioration.
The insulator shall be in one piece and shall have dimensions as shown below
and as per drawing.
a. Outer Diameter of porcelain disc Upper : 115mm
b. Outer diameter of porcelain disc Bottom : 100mm
c. Upper glazed porcelain dia : 50mm
d. Bottom unglazed porcelain dia : 55mm
e. Hollow diameter : 20mm
f. Height of the insulator : 100mm
g. Conductor supporting grove : 13mm. Radius &
diameter 65mm
h. Top curvature of upper porcelain disc : 22 mm radius
5.0 Type Of Insulators
Shackle insulator is an insulator consisting of one porcelain part and intended to be
mounted vertically or horizontally between and in contact with two ends of a 'U' straps or
a pair of straps with its axis vertical and intended to secure a line conductor in tension.
6.0 Insulator Characteristics
The insulators shall have the electrical and mechanical characteristics as shown below:
a. Dry power frequency withstand test voltage 23 KV(rms)
b. Wet power frequency withstand test voltage 10 KV(rms)
c. Power frequency puncture withstand test 1.3 X the actual dry flashover voltage
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d. Minimum failing load 16 KN
7.0 Tests
7.1 Type test
The following type tests shall be conducted on a suitable number of individual insulator
unit, components, materials or complete strings:
a) Verification of dimensions
b) Thermal mechanical performance test
c) Power frequency voltage withstand and flashover test (i) dry (ii) wet
d) Impulse voltage withstand and flashover test (dry)
e) Visible discharge test (dry)
f) RIV test (dry)
g) Mechanical failing Load Test (for pin insulator only)
h) 24 hrs. mechanical strength test (for strain / string insulator only)
7.2 Acceptance Tests
a) Visual examination
b) Verification of dimensions
c) Temperature cycle' test
d) Galvanizing test
e) Mechanical performance test
f) Test on locking device for ball and socket coupling
g) Eccentricity test
Metallurgical test
a. Grain size
b. Inclusion rating – For metal fittings only (in black condition)
c. Chemical analysis
d. microstructure
Mechanical failing load test (for Pin Insulator only)
Electro-mechanical strength test (for Strain Insulator only)
Porosity test
Puncture test (for Strain Insulator only)
7.3 Routine Tests
a) Visual Inspection
b) Mechanical routine test for Strain Insulator only)
c) Electrical routine test (for Strain Insulator only)
7.4 Tests During Manufacture
On all components as applicable
a) Chemical analysis of zinc used for galvanizing
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b) Chemical analysis, mechanical, metallographic test and magnetic particle
inspection for malleable castings.
c) Chemical analysis hardness tests and magnetic particle inspection for forgings
d) Hydraulic Internal Pressure tests on disc insulator shells
7.5 Schedule Of Testing And Additional Tests
7.5.1 The Bidder has to indicate the schedule of following activities in their bids:
a) Submission of drawings for approval
b) Submission of Quality Assurance Programme for approval
c) Offering of material for sample selection for type tests
d) Type testing.
7.5.2 Additional Tests
The Owner reserves the right of having at his own expense any other test(s) or reasonable
nature carried out at Contractor's premises, at site, or in any other place in addition to the
aforesaid type, acceptance and routine tests to satisfy himself that the material comply
with the Specifications.
7.5.2.1 The Owner also reserves the right to conduct all the tests mentioned in this
specification at his own expense on the samples drawn from the site at Contractor's
premises or at any other test center. In case of evidence of noncompliance, it shall be
binding on the part of the Contractor to prove the compliance of the items to the technical
specifications by repeat tests or correction of deficiencies, or replacement of defective
items, all without any extra cost to the Owner.
7.5.3 Co-ordination for Testing
The Contractor shall have to co-ordinate testing of insulators with hardware fittings to be
supplied by other Contractor and shall have to also guarantee overall satisfactory
performance of the insulators with the hardware fitting.
7.5.4 Test Reports
7.5.4.1 Copies of type test reports shall be furnished in at least six (6) copies along with one
original. One copy shall be returned duly certified by the Owner only after which the
commercial production of the concerned materials shall start.
7.5.4.2 Copies of acceptance test reports shall be furnished in at least six (6) copies. One
copy shall be returned duly certified by the Owner, only after which the material shall
be despatch.
7.5.4.3 Record of routine test reports shall be maintained by the Contractor at his works for
periodic inspection by the Owner's representative.
7.5.4.4 Test certificates of test during manufacture shall be maintained by the Contractor.
These shall be produced for verification as and when desired by the Owner.
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8.0 Inspection 8.1 The Owner's representative or third party nominee shall at all times be entitled to have access to
the works and all places of manufacture, where insulator, and its component parts shall be
manufactured and the representatives shall have full facilities for unrestricted inspection of the
Contractor's and subContractor's works, raw materials, manufacture of the material and for
conducting necessary test as detailed herein.
8.2 The material for final inspection shall be offered by the Contractor only under packed condition as
detailed in the specification. The Owner shall select samples at random from the packed lot for
carrying out acceptance tests. Insulators shall normally be offered for inspection in lots not
exceeding 5000 nos. the lot should 'be homogeneous and should contain insulators manufactured
in the span of not more than 3-4 consecutive weeks.
8.3 The Contractor shall keep the Owner informed in advance of the time of starting and the progress
of manufacture of material in their various stages so that arrangements could be made for
inspection.
8.4 No material shall be dispatched from its point of manufacture before it has been satisfactorily
inspected and tested unless the inspection is waived off by the Owner in writing. In the latter case
also the material shall be dispatched only after satisfactory testing for all tests specified herein
have been completed.
8.5 The acceptance of any quantity of material shall be no way relieve the Contractor of his
responsibility for meeting all the requirements of the specification and shall not prevent
subsequent rejection, if such material are later found to be defective.
9.0 Marking
Each insulator shall be legibly and indelibly marked to show the following a. Name or trade-mark of the manufacturer
b. Year of manufacture
c. ISI marking.
Marking on porcelain shall be printed and shall be applied before fixing.
10.0 Drawing
10.1 The Bidder shall furnish full description and illustration of the material offered.
10.2 The Bidder shall furnish along with the bid the outline drawing (6 copies) of each
insulator unit including a cross sectional view of the insulator shell. The drawing shall
include but not limited to the following information:
a. Dimensions with manufacturing tolerances
b. Minimum creepage distance with positive tolerance
c. Protected creepage distance
d. Eccentricity of the disc i) Axial run out
ii) Radial run out
e. Unit mechanical and electrical characteristics
f. Size and weight of Pin Ball Shank / ball and socket parts
g. Weight of unit insulator disc
h. Materials
i. Identification mark
j. Manufacturer's catalogue number
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7.0 TECHNICAL SPECIFICATION FOR STAY SET (HT & LT)
1.0 Scope:
This specification covers the design, manufacture testing at manufacturer's works,
transport to site, insurance, storage, erection and commissioning of the Stay Sets (L
T/HT) required from the distribution lines at designated locations.
2.0 Standard: All the materials of stay sets shall comply in all respects with the
requirements of the latest edition of the relevant Indian or British Standard
specification except in so far as they are modified this specification.
3.0 Design Consideration: Stay Rods shall be Galvanised and shall be of circular Cross-section with
bow, thimble, nuts and bolts. The Rods shall be threaded at one end up to a minimum of 30 cm
length and shall be complete with Galvanised M.S. Anchor Plates with all necessary accessories.
All parts shall be heavily galvanised.
4.0 Climatic Conditions
(ii) Maximum ambient temperature in shade : 40°C
(iii) Minimum daily average ambient air temperature : 35°C
(iv) Maximum yearly average ambient air temperature : 30°C
(v) Maximum ambient temperature : 2°C
(vi) Maximum relative humidity : 93%
(vii) Average number of thunder storms days per annum : 45 days
(viii) Average number of rainy days per annum : 150 days
(ix) Average annual rainfall : 2280 mm
(x) Number of months of tropical monsoon conditions : 5 months
(xi) Maximum wind pressure : 150 Kg/sq.m
(xii) Altitude not exceeding : 1000 M
5.0 Testing: Type and Routine Tests should be carried on different components of each stay sets as
per relevant Indian Standard specification and certified copies of the above should be submitted
along with the tender.
6.0 Schedule Requirement·: Stay sets complete with Thimble bow stay
Rod/Anchor plate with nuts etc. and made of Rolled mild Steel Rod and plates as per detailed
given below:
A) Anchor Plate:
II) Thickness not below 5 mm.
III) Size not below 230 mmX230 mm with smooth edges (for L T)
IV) Size not below 300 mmX300 mm with smooth edges (for HT)
V) Well galvanised
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VI) Materials M.S. Rolled plate
VII) About 20 mm square hole at centre for locking the plate with the Anchor Rod
(for HT) & 19 mm (for L T)
B) Anchor Rod:
2.1 Length 1800 mm or above
2.2 Threaded length 30 cm or above
2.3 Diameter 18 mm or above (for HT)
2.4 Anchor plate and head: square size 30mm X 30mm with thickness 25 mm
having matching square size shank for locking the Anchor plate.
2.5 One ratched lock nuts, grooves must match the grooves at bow flange
2.6 One check nut.
2.7 Materials H.S.
2.8 Component well galvanised with extra care for the threaded portion.
2.9 Both lock and check nuts should be matching to the Anchor Rod thread such
that punching of thread after assembly at site safeguards them against removal.
C) Thimble: The match bow diameter and bend should be well galvanised.
D) Bow: Rod diameter 12mm/16mm or above overall length 35cm/40cm or above. Flange
with well formed locking grooves matching the locking nut, bow ends will be riveted
securely with the flange. All items to be galvanised.
7.0 Inspection: All tests and inspections shall be carried out at the place of manufacturer
unless otherwise agreed by the purchaser and the manufacturers at the time of
purchase. A manufacturer shall afford the inspector representing the purchaser or
third party nominee, all reasonable facilities, without charge to satisfy that the
materials are being purchased as per specification. The purchaser reserves the right
to have the test carried out at his cost by an independent agency, whenever there is
dispute regarding the quality of the materials supplied.
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8.0 TECHNICAL SPECIFICATION FOR G.I. STAY WIRE
1.0 Scope
The specification covers design, manufacturing and testing, transporting to site,
insurance, storage, erection and commissioning of G.I. Stay Wire 7/10SWG and 7/14SWG.
2.0 Materials.
The wire shall be manufactured from steel, made by any suitable process and shall not contain
sulphur and phosphorus exceeding 0.065 percent each.
The wires shall be coated with Zinc Grade Zn 98 of IS:209-1966
The general requirements for the supply of Galvanized stay strand shall be in accordance with
IS:1387-1967
3.0 Construction
3.1 Grades: The wire shall be of Grade-I and tensile strength range 45 up to and including
Kg/mm
3.2 The Galvanized stay strand shall be of 7/2 mm and 7/3.15 mm. the lay of the strands shall be
of the length of 7/2 mm and Tables-I of IS: 2141-1963. the wires shall be so stranded together
that when and evenly distributed pull is applied at the end of the completed strand each wire
will take equal share of the pull.
3.3 The length of the strand which may be supplied without joints in the individual wires
comprising it, depend on the length of wire which may be carried by the bobbin in a normal
stranding machine. The normal lengths of strand which shall be supplied without joints in the
individual wires, excluding welds made in the rod before drawing shall be as given below.
The lengths may be exceeded by agreement between the manufacturer and the purchaser.
Diameter of wire in strand Normal length without joints of weld
3.15 mm 1000 M
2.0 mm 3000 M
3.4 In cases where joints are permitted, they shall be made by welding of brazing joints in the
same wire shall be separated by a length of not less than that shown in 3.3 and joints in
different wires in a strand shall not be less than 20 M apart.
4.0 Freedom from Defects :
4.1 Each coil shall be warranted to contain no weld joint or splice other than in the rod before it is
drawn and those permitted in 3.4. The wire shall be circular and shall be free scale,
irregularities imperfections flaws splits and other defects. The Zinc coating shall be smooth,
even the bright.
5.0 Tests:
5.1 Chemical Analysis: Unless otherwise agreed to between the purchaser and the supplier, the
chemical analysis be carried out.
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5.2 Tensile Test: The wire when tested in accordance with IS: 1521-1960, on gauge length of 100
mm shall have the minimum tensile strength specified in Tables 1 of IS : 2141/1968
according to the grade of the wire.
5.2.1 The tensile strength of the finalised strand shall be not less tI~an 93 percent of the aggregate
of the single wires.
5.3 Delivery test: The wire shall be subjected to the wrapping test in accordance with IS :
1755/1961. When wrapped eight times round its own diameter and on being subsequently
strengthened the wire shall not break or split.
5.3.1 Coating test: The uniformity of Zinc coating shall be tested by the method specified in IS :
2633/1964. The wire shall withstand the number or dips as specified in IS : 4826-1968.
6.0 Marking:
6.1 Each coil shall be provided with a label, fixed firmly on the inneJ part of the coil, bearing 'the
following information.
a. Manufacturer's name or trade mark
b. Lot number and coil number
c. A brief description and quality of the materials.
d. Weight and
e. Any other particulars specified by the purchaser
.
6.2 The label may also be marked with the ISI certification mark.
7.0 Inspection: The test should be carried out in presence of the inspecting officer deputed by
purchaser or third party nominee and the test should be in conformity with relevant IS
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9.0 TECHNICAL SPECIFICATION FOR CROSS ARM
1.0 Scope
This covers manufacturing, transport to site, insurance, storage, erection and
commissioning of different types of Cross Arms suitable for 33 kV, 11 kV and L T lines.
2.0 Climatic Conditions
The cross arms should be suitable for the climatic condition mentioned below:
a) Maximum temperature of air in shade 40°C
b) Minimum temperature of air in shade 2°C
c) Maximum temperature of air in Sun 40°C
d) Maximum Humidity 93%
e) Average number of thunderstorm days 45
f) Average numbers of dust storms per annum 10
g) Maximum rainfall/annum 3500 mm
h) Average rainfall 2280 mm
i) Wind Pressure 97.8 Kg/Sq.mm
j) Altitude above MSL 100 m to 1000 m
3.0 Standards
A. For 11 KV’ Cross-Arm
Cross Arms shall be made as per the drawings enclosed.
The Cross Arms shall be made out of 75 X 40 X 6 mm MS Channel and MS
Flat 50 X 6 mm
Cross Arms shall be hot dip galvanized generally conforming to IS-2633/1972
Cross Arms should not be welded/joined at any place except as specified.
The clamps for the Cross Arms shall be made of 50 X 6 MS Flat and shall be
hot dipped galvanized.
The clamps shall be designed to fit for the specified STP/PSC poles.
The rolling and cutting tolerance for steel products conforming to IS-226 shall
be those specified in IS-1852/1973 or latest version.
B. Cross Arm for 33 KV Lines.
The Cross Arms shall be made as per the drawings.
The Cross Arms shall be made out of 100 X 50x6mm MS Channel
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and MS Flat 75 X 8 mm
The Cross Arm shall be hot dipped galvanized generally conforming
to the IS-2633/1972
The Clamps for the Cross Arms shall be made out of 75 X 8 mm MS
Flat and shall be hot dipped galvanized conforming to IS-2633/1972
The Clamps shall be designed to fit for STP/PSC Poles.
The rolling and cutting tolerance for steel products conforming to IS-
226 shall be those specified in IS-1852/1972 or latest version.
C. Horizontal Type Cross Arm for 11 KV / 33 KV
It shall comprise of 100 X 50x6 mm, 3.2 M long MS Channel for 33
KV and 2.2 mt. long for 11 KV to be provided on STP/ PSCC Poles
The rolling and cutting tolerance for steel products conforming to IS-
226 shall be those specified in IS-1852/1972 or latest version.
The Cross Arm shall be hot dipped galvanized generally conforming
to the IS-2633/1972
The clamps for the Cross Arms shall be made of 50 X 6 MS Flat and
shall be hot dipped galvanized.
The Cross Arm should not have any welded joints.
D. Cross Arm for LT Lines
The Cross Arms shall comprise of 40 X 40 X 6 mm, 0.51 Mt. long MS
Channel to be provided on PSCC Poles.
The rolling and cutting tolerance for steel products conforming to IS-
226 shall be those specified in IS-1852/1972 or latest version.
The Cross Arm shall be hot dipped galvanized generally conforming
to the IS-2633/1972
The Cross Arm should not have any welded joints.
The clamps shall be manufactured with MS Flat 50 X 6 mm suitable
for PSCC poles and shall be hot dipped galvanized.
E. LT MS Angle Cross Arm size 75 X 40 X 6 X 1020 mm
The Cross Arm should not have any welded joints.
All the Cross Arms shall be properly brushed to make free from rust
and then coated with two coatings of red oxide chromate paint as per
IS-5660/1970.
The sample Cross Arm and supplied made hereafter should bear
identification mark by way of punching or painting.
One copy of the drawing for each size of the cross arm tendered for
should be given to the purchaser.
The rolling and cutting tolerance for steel products conforming to IS-
226 shall be those specified in IS-1852/1972 or latest version.
4.0 INSPECTION
Inspection may be carried out by the purchaser or third party nominee at any stage of
manufacture. The supplier shall grant free access to the purchaser's representative or
third party nominee at a reasonable time when the work is in progress. Inspection and
acceptance of any equipment under this specification by the purchaser shall not relieve
the supplier of his obligation of furnishing equipment in accordance with the
specification and shall not prevent subsequent rejection if the equipment is found
defective.
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10.0 TECHNICAL SPECIFICATION FOR G.I. WIRE
1.0 Scope
This specification covers the manufacturing, testing at works, transport to site,
insurance, storage, erection and commissioning of Galvanised Iron Wire of sizes 4 mm
and 5 mm diameter.
2.0 General requirements
2.1 It relating to the supply of mild steel wire shall be as per IS: 1387/1967 and the wire
shall be drawn from the wire rods conforming to IS: 7887/1975.
2.2 The requirements for chemical composition for the wires shall conform to
IS:7887/1975.
2.3 Mild steel wire for General Engineering purpose shall be of following sizes:
I) 4mm - diameter (8 SWG)
II) 5mm - diameter (6 SWG)
2.4 Tolerance permitted on the diameter of wire shall be as per Table -1 of IS:280/1978.
3.0 Climatic Conditions
The cross arms should be suitable for the climatic condition mentioned In these
bidding documents:
4.0 Mechanical Properties
2.10 Tensile Test: Tensile strength of wire when tested in accordance with IS:
1521-1972, shall be within the limits given in Table-2 of IS: 280/1978.
2.11 Wrapping Test: Wires shall be subjected wrapping test in accordance with IS:
1755-1961. The wire shall withstand without breaking or splitting. being wrapped eight
times round its own diameter and subsequently straightened.
5.0 Surface finish
5.1 The wire shall have galvanized finishes. The galvanized coating of steel wire shall conform
to the requirements for anyone of the types of coatings given in IS: 4826-1968 as per
agreement with the purchaser.
5.2 The coating test for finishes other than galvanized, copper coated or tinned shall be subject
to between the purchaser and the manufacturer.
5.3 Unless otherwise agreed to the method of drawing representative samples of the material and
the criteria for conforming shall be as prescribed in Appendix (A) of IS: 280/1978.
5.4 All finished wires shall be well and cleanly drawn to the dimensions specified. The wire
shall be sound, free from splits, surface flaws, rough jagged and imperfect edges and other
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harmful surface defects.
5.5 Each coil of wire shall be suitably bound and fastened compactly and shall be protected by
suitably wrapped.
6.0 INSPECTION
Inspection may be carried out by the purchaser or third party nominee at any
stage of manufacture. The supplier shall grant free access to the purchaser's
representative or third party nominee at a reasonable time when the work is in
progress. Inspection and acceptance of any equipment under this specification
by the purchaser shall not relieve the supplier of his obligation of furnishing
equipment in accordance with the specification and shall not prevent subsequent
rejection if the equipment is found defective.
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11.0 TECHNICAL SPECIFICATION FOR P.G CLAMP FOR AAA
CONDUCTOR
1.0 Scope:
The scope covers design, manufacturing, testing at work, transport at
site, insurance, storage, erection and commissioning of P.G. Clamp
suitable for Conductor size Wolf/RacoonlWeasel/3 Bolt Type strictly
conforming to IS : 2121 and Galvanising conforming to IS : 2633 as per
the following:
2.0 Standards:
P.G. Clamps suitable for conductor size, wolf/raccoon/weasel 3 bolt types strictly
conforming to IS : 2121 and galvanizing conforming to IS: 2633 as per the
following:
P.G. clamp body to be made from aluminium alloy
Clamps nuts and bolt and washer should be made of hot deep galvanized steel
Spring washer be made of electro-galvanize special steel.
Style
No.
Maximum
conductor
diameter in
mm
Dimensions
No of
Bolts
Approx.
Weight
Kg. A
mm
B
mm
C
mm
D
mm
E
mm
A-80 10.11 79 48 22 ½ 2 2 0.17
A-81 14.45 95 57 30 ½ 2 2 0.18
A-83 20.78 140 76 42 5/8 1 3 0.51
5.0 Climatic Conditions.
a) Maximum temperature of air in shade 40°C
b) Minimum temperature of air in shade 2°C
c) Maximum temperature of air in Sun 40°C
d) Maximum Humidity 93%
e) Average number of thunderstorm days 45
f) Average numbers of dust storms per annum 10
g) Maximum rainfall/annum 3500 mm
h) Average rainfall 2280 mm
i) Wind Pressure 97.8 Kg/Sq.mm
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j) Altitude above MSL 100 m to 1000 m
6.0 INSPECTION
Inspection may be carried out by the purchaser or third party nominee at any stage of
manufacture. The supplier shall grant free access to the purchaser's representative or third
party nominee at a reasonable time when the work is in progress. Inspection and
acceptance of any equipment under this specification by the purchaser shall not relieve
the supplier of his obligation of furnishing equipment in accordance with the specification
and shall not prevent subsequent rejection if the equipment is found defective.
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SECTION -4
GUARANTEED TECHNICAL
PARTICULARS
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GUARANTEED TECHNICAL PARTICULARS OF ALL ALUMINUM ALLOY CONDUCTOR
(AAAC)
(To be filled in by the Tenderer)
Sl.No. Description Unit Particulars
1.0 Maker’s name & Address
2.0 Conductor size and Code
3.0 IS Standard applicable
4.0 Wire diameter in mm mm
5.0 Diameter of complete conductor in mm mm
6.0 Number of strands Nos.
7.0 Sectional area of alloy Aluminum mm²
8.0 Total sectional area mm²
9.0 Particulars of Raw Materials
9.1 Aluminum
a) Minimum Purity of Aluminum %
9.2 Zinc %
a) Minimum Purity of Zinc
9.3.0 Aluminum Strands after stranding
9.3.1 Diameter
a) Nominal Mm
b) Maximum Mm
c) Minimum Mm
9.3.2 Minimum breaking Load Strand kN
9.3.3 Maximum Resistance of 1 M length Ohm
10.0 Galvanizing
a) Minimum weight of zinc coating per uncoated wire
surface gm/m²
b) Minimum number of one minute dips galvanized strand
can withstand in the test Nos.
c)
Minimum number of twists in a gauge length times dia
of wire which the strand can withstand in the torsion
test (after stranding)
Nos.
11.0 AAAC stranded conductor
11.1 UTS of conductor kN
11.2 Lay ratio of conductor Max
a) 1st layer
b) 2nd
layer
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11.3 D.C resistance of conductor at 20°C Ohm/Km
11.4 Standard length of conductor M
11.5 Continuous current rating at 75°C (Enclose supporting
calculations)
11.6 Final modulus of elasticity
11.7 Co-efficient of Linear Expansion
11.8 Strand
a) Standard diameter mm
b) Minimum
c) Maximum
d) Cross-Sectional area of Nominal diameter wire mm²Nos.
e) Weight in Kg/KM
f) Minimum breaking load
Before Stranding
After stranding
Kg/kN
g) Coefficient of linear expansion
11.9 Joints in strands
a) Aluminum Alloy
b) Method of making joint
c) Ultimate tensile Strength of Joint
12.0 Maximum single length of conductor that can be
manufactured if required for single stretch Meter
13.0 Tolerance of standard length of conductor %
14.0 Direction of lay for outside layer
14.1 Linear mass of the conductor
a) Standard Kg/KM
b) Minimum Kg/KM
c) Maximum Kg/KM
15.0 No. of cold pressure butt welding available at works
16.0 Standard according to which the conductor will be
manufactured and tested
a) Certification mark if any
b) Test Certificate enclosed Yes/No
17.0 Initial & Final sag and tension charts furnished
18.0 Stress/Strain data corresponding to different tensions
temperatures furnished
19.0 Curves/tables of creep compensation corresponding to
different tension temperatures furnished
20.0 PERFORMANCE GUARANTEE
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GUARANTEED TECHNICAL PARTICULARS FOR 11 KV SURGE/LIGHTENING ARRESTORS
(To be filled in by the Tenderer)
Sl. No. Description Particulars
1 Name & Address of Supplier & Manufacturer
Surge Arrestor
Line Disconnector
Metal Oxide Block
Terminal Clamp
2 Name & address of collaborator, if an
3 Standard to which surge arrestors conforms
4.0 Surge Arrestor
4.1 Voltage rating (KV rms)
4.2 Continuous Operating Voltage (KV rms)
a) Continuous Operating Voltage (KV rms)
b) Leakage current at continuous operation voltage
c) Permitted leakage current of arrestor beyond which arrestor is
faulty.
5 Frequency (Hz.)
6 Nominal discharge current (wave shape – 8/20 micro second) (KA)
7 Pressure relief rated current (KA rms)
8. Steep current protection level at 10 KA
a) Lightning impulse protection level with 40 X 80 mico-sec. Wave
at 500/1000 A
9 Long duration current impulse withstand capacity and virtual
duration
10 Line discharge class
11 Thermal runway limit arrestor
12 Energy capability (kj/KV)
13 Pressure relief rating
14 Dry arcing distance
15 Reference current and reference voltage
16 Arrestor Housing
16.1 Power frequency one minute wet withstand voltage (kV rms)
16.2 Lightning impulse dry withstand voltage (kVP)
16.3 Creepage distance
a) Protected
b) Total
16.4 Short Circuit withstand capacity
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16.5 Bending moment (mm)
17 Dis-connector
a) Constructional Details
b) Other information as applicable to surge arrestor
18 Surge Monitor
a) Constructional Details
b) Degree of protection
19 Suitable for hot line washing
20 Dimension and Weight
21
G.A Drawing indicating height of complete unit from base to line,
minimum recommended center to center spacing, clearance from
ground equipment at various height of Arrestor, earthing arrestor,
earthing arrangement on earthed side of arrestor etc.
22 Details of Packing
23 License number and date for using ISI certification mark if any
24 Ammeter for discharge current
a) Type & Make
b) Accuracy
c) Range (mA)
25 Residual voltage
26 Follow Current
27 PERFORMANCE GUARANTEE
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GUUAARRAANNTTEEEEDD TTEECCHHNNIICCAALL PPAARRTTIICCUULLAARRSS OOFF 1111 kkVV PPIINN IINNSSUULLAATTOORR
(To be filled in by Tenderer)
S.N
O.
Description Particulars
1 Manufacturer’s Name & Address
2 Type of insulator offered
3 Drawing Numbers
4 Over all Dimensions (mm)
a) Height
b) Out Diameter
5 Nominal System Voltage (kV)
6 Highest System Voltage (kV)
7 Minimum Failing Load (kN)
8 Dry Power Frequency Flashover Voltage (kV)
9 Wet Power Frequency Flashover Voltage (kV)
10 Puncture Withstand Voltage (Power Frequency) (kN)
11 Min. Creepage Distance (mm)
12 Impulse Flashover Voltage : (kV)
a) 1.2/50 Micro Sec. Wage of Positive Polarity
b) 1.2/50 Micro Sec. Wage of Negative Polarity
13 Impulse Withstand Voltage : (kV)
a) 1.2/50 Micro Sec. Wave of Positive Polarity
b) 1.2/50 Micro Sec. Wave of Negative Polarity
14 Dry Power Frequency 1 Min. Withstand Voltage (kN)
15 Wet Power Frequency 1 Min. Withstand Voltage (kN)
16 Minimum Visible Discharge Test Voltage
17 Net Weight (Approx.) (Kg)
18 Standard According to which Porcelain Insulators be Manufactured
and Tested
19 Tolerance in Dimensions, if any (as per ISS)
20 Temperature Cycle Test (as per ISS)
21 Porosity Test (as per ISS)
22 Performance guarantee
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GGUUAARRAANNTTEEEEDD TTEECCHHNNIICCAALL PPAARRTTIICCUULLAARRSS OOFF GGII PPIINN FFOORR 1111 KKVV PPIINN IINNSSUULLAATTOORR
(To be filled in by the tenderer)
1. Name & address of the manufacturer
2. Physical dimensions
a. Stalk length in mm
b. Shank length in mm
c. Thickness of collar in mm
d. Diameter of collar in mm
e. Diameter of shank in mm
f. Threaded length of shank in mm
g. Dia of stalk head in mm
h. Threaded length of stalk in mm.
4. Gross weight in kg.
5. Weight of zinc coating in gms
6. Mechanical failing load in KN
7. Other particulars
8. Performance guarantee
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GUARANTEED TECHNICAL PARTICULARS FOR 11 KV GOAB SWITCH
A. Isolating Switches
Name of Manufacturer of Isolating Switches
Particulars for Isolating Switches
a. MVA Ratings
b. Number of Poles
c. Voltage Rating
d. Current rating (Amps)
i. Normal
ii. Maximum
iii. Short Time
e. Temperature rise of the following at the full rated current
in Degree °C over in ambient 50°C
i. Terminals
ii. Contacts
iii. Metal parts
f. Thickness in mm of Silver Plating / Tin Plating
g. Voltage drop across:
i. Each Contact
ii. Terminals
h. Frequency
i. Short Time Current and duration
j. Type of Materials used in Contacts
k. Materials used in Contacts
l. Type & Materials of the Terminal connectors provided
m. Diameter and length of the channels of GI Operating Pipe
n. Size & Length of the channels provided for mounting
three phases
o. Minimum clearance between phases.
(i.e. the centre distance between the insulating of the
adjacent phases in the assembled position of the Switches
p. Minimum clearance in air
i. Between the poles
ii. Between live parts & earth
q. Type & Detail of operating Mechanism
i. Rotating Insulator Stack
ii. Operating Shaft
r. Whether the switch is complete with the necessary
universal joints Guides locking arrangements with padlock
and key and stops etc.
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s. Type of monitoring
t. Number of Breaks per phase
u. Number of breaks
v. Materials of the rotating parts
w. Weight of insulators & mechanism
x. Dimensions of the flexible cords
i. Thickness
ii. Length
iii. Weight
xi. Materials used in flexible cord, its terminal place and
the terminal block
2.1 Impulse withstand voltage with 1/50 micro-seconds wave positive
and negative polarity
i. Across Isolating distance
ii. To earth & between poles
2.2 One minute power frequency withstand voltage
i. Across Isolating distance
ii. To earth & between Poles
3.0 Does the equipments conform to ISS:1818/1961
B. Insulators
1.0 Particulars for Insulators
1.1 Type of Insulator
1.2 Name of the Manufacturer of the Insulator
1.3 Height of Insulator
1.4 Diameter of the Largest Shed
1.5 Number of units per stack
2.0 Electrical Characteristics (for one Insulator)
2.1 Flashover voltage
a. Dry Power Frequency
b. Wet Power Frequency
c. Impulse voltage of 1/50 micro-secs. (+ve)
d. Impulse voltage of 1/50 micro-secs. (-ve)
2.2 Withstand Voltage
a. Dry Voltage
b. Wet voltage
c. Impulse voltage of 1/50 micro-secs. (+ve)
d. Impulse voltage of 1/50 micro-secs. (-ve)
2.3 Power frequency puncture withstand of unit
2.4 Mechanical characteristics
a. Cantilever strength upright
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b. Cantilever strength under hand
c. Torsional strength
d. Tensile strength
e. Compression strength
2.5 General characteristics
a. Minimum creepage distance
b. Weight of complete unit
c. Weight of non-ferrous parts (total)
d. Weight of ferrous parts (total)
2.6 Standard to which insulator conforms
Note: Value for Insulators should be given in metric units and should be for one insulator only
3.0 PERFORMANCE GUARANTEE
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GUARANTEED TECHNICAL PARTICULARS FOR 11 KV DISC INSULATOR 45 KN(T&C)
(To be filled in by the Tenderer)
Sl.No Description Particulars
1 Manufacturer’s Name & Address
2 Type of Insulator offered
3 Drawing Numbers
4 Overall Dimensions (mm)
a) Height
b) Outer Diameter
5 Nominal System Voltage (kV)
6 Highest System Voltage (kV)
7 Minimum Failing Load (kN)
8 Dry Power Frequency Flashover Voltage(kV)
9 Wet Power Frequency Flashover Voltage(kV)
10 Puncture withstand Voltage (Power Frequency) (kN)
Minimum Creepage Distance (mm)
11 Minimum Creepage Distance (mm)
12 Impulse Flashover Voltage (kV)
a) 1.2/50 Micro-Sec. Wave Positive Polarity
b) 1.2/50 Micro-Sec. Wave Negative Polarity
13 Impulse Withstand Voltage (kV)
a) 1.2/50 Micro-Sec. Wave Positive Polarity
b) 1.2/50 Micro-Sec. Wave Negative Polarity
14 Dry Power Frequency 1 Min. Withstand Voltage (kN)
15 Wet Power Frequency 1 Min. Withstand Voltage (kN)
16 Minimum Visible Discharge test Voltage
17 Net Weight (approx.) (Kg.)
18 Standard According to which Porcelain Insulators to be Manufactured
and tested
19 Tolerance in Dimensions, if any (as per ISS)
20 Temperature Cycle Test (as per ISS)
21 Porosity Test (as per ISS)
22 PERFORMANCE GUARANTEE
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GGUUAARRAANNTTEEEEDD TTEECCHHNNIICCAALL PPAARRTTIICCUULLAARRSS OOFF HH..TT.. && LLTT GGUUYY IINNSSUULLAATTOORR
S.NO. PARAMETER GUARANTEED VALUE
1 Manufacturer’s Name & Address
2 Type of insulator
3 Standards to which insulator will conform
4 Dimensions
5 Hole diameter (mm)
6 Color of glaze
7 Dry Power Frequency withstand Voltage (kV)
8 Wet Power Frequency withstand Voltage (kV)
9 Minimum failing load (Newton)
10 Minimum Creepage distance (mm)
11 Weight per piece (Kg)
12 Temperature cycle test (as per ISS)
13 Porosity test (as per ISS)
14 Tolerance, if any (as per ISS)
15 Performance guarantee
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GUARANTEED TECHNICAL PARTICULARS OF L.T. SHACKLE INSULATOR
(To be filled in by the Tenderer)
Sl.No. Description Particulars
1 Manufacturer’s Name & Address
2 Type of Insulator
3 Standards to which insulator will conform
4 Dimensions
5 Hole diameter (mm)
6 Color glaze
7 Dry power Frequency Withstand Voltage (kV)
8 Wet power Frequency Withstand Voltage (kV)
9 Dry power Frequency Flashover Voltage (kV)
10 Wet power Frequency Flashover Voltage (kV)
11 Power Frequency Puncture Withstand Voltage (kV)
12 Minimum failing load (kN)
13 Minimum Creepage Distance (mm)
14 Weight per piece (Kg)
15 Temperature cycle test (as per ISS)
16 Porosity test (as per ISS)
17 Tolerance, if any (as per ISS)
18 PERFORMANCE GUARNATEE
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GGUUAARRAANNTTEEEEDD TTEECCHHNNIICCAALL PPAARRTTIICCUULLAARRSS FFOORR GG..II.. WWIIRREE
((TTOO BBEE FFUURRNNIISSHHEEDD BBYY BBIIDDDDEERR))
A. G.I.Wire (4 mm dia) :
1. Size of Wire :
2. Tolerance in size of wire :
3. Tensile strength :
4. Wrapping list :
5. Galvanising conforming to IS : 4826
– 1968 :
6. Guarantee :
B. G.I.Wire (5 mm dia) :
1. Size of Wire :
2. Tolerance in size of wire :
3. Tensile strength :
4. Wrapping list :
5. Galvanising conforming to IS : 4826
– 1968 :
6. Performance guarantee :
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GGUUAARRAANNTTEEEEDD TTEECCHHNNIICCAALL PPAARRTTIICCUULLAARRSS FFOORR CC..II.. PPIIPPEE ((EEAARRTTHH))
((TTOO BBEE FFUURRNNIISSHHEEDD BBYY BBIIDDDDEERR))
Sl. G.I.Wire (4 mm dia) :
1. Length of Pipe :
2. Diameter of Pipe :
3. External Dia of Pipe :
4. Thickness of Pipe :
5. Internal Dia of Socket :
6. Thickness of Socket :
7. Internal Depth of Socket :
8. Internal Radius of Socket :
9. Width of Grooves of Socket :
10. External Dia of Grooves Socket
11. Weight of Pipe :
12. Hydraulic Test :
13. Guarantee :