SECTION - IV TECHNICAL SPECIFICATION OF ... EASTERN ELECTRICITY SUPPLY COMPANY OF ODISHA LIMITED...

NORTH EASTERN ELECTRICITY SUPPLY COMPANY OF ODISHA LIMITED

Specification: Gr.B

- 1 –

SECTION - IV

TECHNICAL SPECIFICATION

OF

ELECTRICAL

MATERIALS

V CROSS ARM, HARDWARE FITTINGS, FUSE WIRE ETC.

“ GROUP – B ”


Specification: Gr.B

- 2 –

1. 2.5 mm2 2 core PVC Service Cable Reputed make like Havells,Finolex,Achor,Load

King & good quality ISI marked Unarmored

PVC Cable as per IS:694(Pt-II) & IS:8130-

1976(Conductor)

Quantity

150000 Mtr

2(i) 33 Kv ‘V’ Cross arm (GI) Quantity

33 Kv ‗V‘ cross arm made out of 100x50x6 mm Galvanised

M.S Channel as per REC Standard M-1. The cross arm shall be

fabricated out of 100x50x6 mm size channel having 7.9

Kg/mtr. After fabrication the cross arm shall be painted with

two coats of Red Oxide primer, conforming to REC

construction standard & drawing.

300 Nos.

Guaranteed Technical Particulars of 33 KV 'V' Cross Arm

Sl. No.

Description

Specified

Bidders Offer

1

Type of Cross Arm

ISMC 100x50

2

Channel Weight

7.9 Kg/mtr

3

Grade of Steel

FY 250

4

Steel Standard

IS:2062-1992

5

Fabrication Standard

IS:802 (part - 2) - 1978

6

Dimension

(100x50x6)mm

7 Size of M S Flat welded at both ends

50x8mm

8

Steel Tensile Strength

1500kgf/cm²

9

Working Load

400/ 450/ 550/600Kg

10

Total Weight

19.7 Kg (approx.)


Specification: Gr.B

- 3 –

2.ii) 11 KV ‘V’ Cross arm (GI) Quantity

11 KV ‗V‘ Cross arm made out of 75x40x5 mm Galvanised M.S

Channel as per REC Standard A6. The cross arm shall be

fabricated out of 75x40x5 mm size channel having 5.7 Kg/mtr.

with 50mmx6mm flat as per drawing on top & bottom flange of

the channel where the insulator pin is to be mounted. After

fabrication the cross arm shall be painted with two coats of Red

Oxide primer, conforming to REC construction standard &

drawing.

1500 Nos.

Guaranteed Technical Particulars of 11KV 'V' Cross Arm

Sl. No.

Description

Specified

Bidders Offer

1

Type of Cross Arm

ISMC 75x40

2

Channel Weight

5.7Kg/mtr

3

Grade of Steel

FY 250

4

Steel Standard

IS:2062-1992

5

Fabrication Standard

IS:802 (part - 2) - 1978

6

Dimension

(75x40x5)mm

7 Size of M S Flat welded at both ends

50x8mm

8

Steel Tensile Strength

1500kgf/cm²

9

Working Load

200/300/350/400Kg

10

Total Weight

10.88 Kg (approx.)


Specification: Gr.B

- 4 –

3.i) Back Clamp for 33 KV ‘V’ Cross arm Quantity

Back clamp for 33 KV‘V‘ cross arm made out of 50x8 mm MS

Flat with two coat of red-oxide primer suitable for HT poles

confirming to REC Construction Standard & drawing.

200 Nos.

3.ii) Back Clamp for 11 KV ‘V’ Cross arm Quantity

Back clamp for 33 KV‘V‘ cross arm made out of 50x8 mm MS Flat

with two coat of red-oxide primer suitable for HT PSC poles

confirming to REC Construction Standard & drawing.

1600 Nos.

3.iii) J&L Bolt & Nut for 90 lb Rail Pole Quantity

300 Pairs.

3.iv) HT Stay Side Clamp Quantity

HT stay clamp suitable for PSC poles made out of 50x8 mm MS

Flat with two coat of red-oxide primer , confirming to REC

Construction Standard & drawing.

500 Pairs


Specification: Gr.B

- 5 –

4. 11KV Pole Top Bracket Quantity

11 KV line pole top bracket made out of 50x8 mm M.S Flat with

two coat of red-oxide primer , confirming to REC Construction

Standard.A-7 & drawing .

1000 Nos.

GUARANTEED TECHNICAL PARTICULARS FOR 11KV POLE TOP BRACKET

Sl.No. Constructional Features Specified Bidders

Offer

1. Material used 50x8 mm MS Flat

2. Overall height 385 mm

3. Flange Width (one welded &

one bent)

60 mm

4. Spacing between two flanges 75mm

5. Spacing of 2 nos of 18mm holes

for fixing on pole top

100mm

6. C/L Distance of 2nos of 22mm

holes on top flanges of the

bracket

25mm from edge

of the flange

7. ISS 2062

8. Drawing enclosed


Specification: Gr.B

- 6 –

5.i) 3-Ph. 4W LT spacer (Composite Type) Quantity

LT Spacer suitable for 3-phase, 4 wire LT line made of polypropylene single mould confirming to REC Construction

Standard.B-18 & drawing.

5000 Nos.

5.ii) 3-Ph. 5W LT spacer (Composite Type) Quantity

LT Spacer suitable for 3-phase, 5 wire LT line made of

polypropylene single mould confirming to REC Construction

Standard.B-18 & drawing.

4000 Nos.


Specification: Gr.B

- 7 –

6.i) 11 KV G.I Pin Quantity

11 KV hot-dipped galvanizing Pin suitable for 11 KV pin

insulator , confirming to REC Construction Standard. C- 1. 700 Nos.

GUARANTEED TECHNICAL PARTICULARS FOR 11KV G.I PIN

Sl.No. Description Specified Bidders Offer

1 Manufacturer Name & Address To be specified by Bidder

2 Type of Pin 11KV

3 Applicable International Standard IS:2486 (part-II)

4 Grade Steel HDG Steel

5 Steel Specification HDG Steel

6 Specification of Bolt & Nut As per ISS

7 Specification of Bolt Threads As per ISS

8 Mechanical falling load (MFL) 10 KN

9 Elongation at MFL As per ISS

10 Maximum deflection of Pin Top at MFL

1.5 mm

11 Galvanising Specification IS- 2633

12 Minimum weight of Steel deposited on steel surface

610 g/m²

13 Pin Length 315 mm

14 Shank Length 150 mm

15 Stalk Length 165 mm

16 Type of Thread As per ISS

17 Thread Length As per ISS

18 Drawing enclosed

.


Specification: Gr.B

- 8 –

7.i) 33 KV H/W Fittings (B&S) Quantity

33 KV Hard Ware fittings Ball and socket type ,confirming to

IS: 2486 (Part-II) latest amendment and as per drawing. 200 Sets

ii) 11 KV H/W Fittings (T&C) Quantity

11 KV Hard Ware fittings Tongue & Clevis type ,confirming

to REC Construction Standard C-2 and as per drawing. 3000 Sets

iii) 11 KV H/W Fittings (B&S) Quantity

33 KV Hard Ware fittings Ball and socket type ,confirming to

IS: 2486 (Part-II) latest amendment and as per drawing. 500 Sets

TECHNICAL SPECIFICATION

T & C and B & S Hardware Fittings

The hardware fittings for B & S and T & C Strain Disc Insulator. For use in 33 KV and 11 KV Overhead power lines shall comply IS:2486 (Part-I) 1971 and 2486 (Part-II) /

1974 and IS:2486 (Part-III) 1974 IS:12048 /1987 and REC Specification 24/84 or the

latest revision thereof. All Forging and Casting shall be good finish and free from flows

and other defects. The edges on the outside of fittings such as at the Eye, Cleaves and

Holes shall be rounded.

All parts of different fittings, which provide for Inter-connection shall be made such that

sufficient clearance is provided at the Connection Point to ensure free movement &

suspension of the Insulator string Assembly.All eye and cleaves shall be free in this

manner but care shall be taken that too much clearance between Eye & Tongs of the

cleaves is avoided.

All ferrous fittings and parts other than those of Stainless steel shall be hot dip

galvanized as per ISS: 2633 / 1964.Small fittings like Spring washer , Nuts etc. may be

Electro-galvanized as per

IS-6745 / 72.The threads of nuts and topped holes when cut after

Galvanizing shall be well cited & grassed.


Specification: Gr.B

- 9 –

(A) Ball & Socket type Hardware fittings(Conversional

/ Performed ) for B & S type Strain Insulators

The hardware fittings (Ball and Socket type) shall be suitable for fixing on 100 mmx50

mm channel cross arms and for accommodation of 55 mm² / 100 mm² Conductor.

The set shall complete with following components (i) Cross-arms straps with Bolts & Nuts, Brass split and Spring Washer.

(ii) Two numbers forged cotter pins,Brass split pins,Plain washer.

(iii) One number Ball Eye of malleable cast iron

(iv) One number of socket eye complete with security clips made of Phosphor bronze

made cut of alluminium alloys-A/6.

(v) Halically formed Dead and Conductor grip having a Pre-fabricate loop to fit into the

proved contour of the thimbles on one end and for application over the conductor at the

other end for 55 mm²/100mm² conductors.

(vi) Strain clamps shall be suitable for above ACSR / AAAC.The ultimate strength

of clamp should not be less than 4500 Kg and Slipping strength shall not be less

than 90% of these figures.

(B) Tongue & Clevics type Hardware Fittings (Conventional / ¼ Performed ) for T

& C type Strain Insulators

The Hardware fittings ( Tongue & Clevis type) shall be suitable for fixing on 75 mmx40

mm Channel Cross Arm an accommodation 34mm²/55mm²/100mm² Conductors.

The set shall comply of the following components :- (i) Cross arms straps (Dead & Straps) with Bolt (16mm) Nut and Spring Washer.

(ii) Two Nos. forged cotter pints and spring washer to suit the tongue and the clevics.

(iii) Formed helical fittings should be of suitable materials i.e all alloy aluminum steel

suitable for 34mm²/55mm²/100mm² ACSR/AAAC.

(iv) Strain clamps shall be suitable for the above ACSR

conductor or AAAC.The ultimate strength of the clamp

should not be less than 3000 Kg and slipping strength

shall not be less than 90% of this figure.The clamp

should be malleable cast iron/All alloy A-6.

Tests :

String insulator fittings shall comply with the following tests as per IS: 2486 (Part.I)

Type Tests:

a) Visual examination test

ii) Verification of dimensions

iii) Slip strength test

iv) Mechanical test

v) Electrical resistance test

vi) Heating cycle test

vii) Galvanising test.

Acceptance/ Routine Test :

i)Verification of dimensions

ii) Mechanical test


Specification: Gr.B

- 10 –

iii) Galvanising test

iv) Vidual examination test

v) Routine mechanical test.

Marking :

The caps and clamps shall have marked on them as trade mark & year of

manufacturing.

Packing :

All hardware fittings shall be packed in bags or boxes suitable for

rough handling. Packing shall be marked with the strength and KV

rating.

Guaranteed Technical Particulars :

The bidders are required to furnish the guaranteed technical particulars duly

filed in the proforma along with the bid.


Specification: Gr.B

- 11 –

GUARANTEED TECHNICAL PARTICULARS FOR 11 KV H/W FITTINGS ( T&C )


1. Manufacturer Name & Address

To be specified by Bidder

2. Standard Specification to

which Hard ware Fittings

shall confirm.

IS: 2486 (Part-I,II &II)

3 Ultimate strength 3000 Kg (min)

4. Dimensions in accordance with

IS: 2486(Part-II)

5 Type of washer thickness

a) Spring 2.5 mm

b)Flat 2.5 mm

6. Type of Clamp size Tension Clamp suitable for Squiral/Weasel/ Rabbit

7. Galvanised conform to IS 2633 , IS: 4759-1996 &

IS: 6747

8. Weight of Fittings ..

9. Tolerance in dimension if any

+ 5%

10. Manufacturer trade mark to be

embossed on the sets

Specified by the Bidder

11. Specific drawing to be enclosed.

Enclosed

NB. All ferrous fittings and the parts other than those of stainless steel , shall be galvanized.


Specification: Gr.B

- 12 –

GUARANTEED TECHNICAL PARTICULARS FOR 33 KV H/W FITTINGS ( B&S )


1. Manufacturer Name & Address

To be specified by Bidder

2. Standard Specification to

which Hard ware Fittings

shall confirm.

IS: 2486 (Part-I,II &II)

3 Ultimate strength 4500 Kg (min.)

4. Dimensions in accordance with

IS: 2486(Part-II)

5 Material used and reference to Standard:

i) Cross arm Strap G.I as per IS:1570

ii) Ball Eye Forged Steel IS:2004

iii) Socket Eye Malleable Cast Iron IS:

2108/1962

iv) Bolted type tension clamp & its keeper

Aluminium Alloy LM-6,

IS: 617

6. Galvanised conform to IS 2633 , IS: 4759-1996 &

IS: 6747

7. Weight of Fittings not less than 2.5 Kg.

8. Tolerance in dimension if any

+ 5%

9. Manufacturer trade mark to be

embossed on the sets

Specified by the Bidder

10. Specific drawing to be enclosed.

Enclosed

NB. All ferrous fittings and the parts other than those of stainless steel , shall be galvanized.


Specification: Gr.B

- 13 –

8. M16 GI Nuts & Bolts Quantity

16 mm diameter M.S. Nuts and Bolts black hexagonal As

per IS: 1387 (Part-II) Gr.-4/4.6 of following size

i) 16x40 mm ( Fully threaded) 1000 Kg

ii) 16x125 mm ( Treaded length – 70 mm) 3000 Kg

iii) 16x150 mm ( Treaded length – 70 mm) 3000 Kg

iv) 16x175 mm ( Treaded length – 70 mm) 2000 Kg

v) 16x200 mm ( Treaded length – 70 mm) 2000 Kg

vi) 16x225 mm ( Treaded length – 70 mm) 5000 Kg

vii) 16x250 mm ( Treaded length – 80 mm) 2000 Kg

SPECIFICATION OF FINISHED PRODUCTS :

1. The bolts & Nuts shall be ISI Marked Galvanized Iron of Black Grade ―B‖ and

shall be round with hexagonal head.

(i) The Bolts and Nuts shall be manufactured by Hot/Cold forging process neatly and

cleanly finished and shall have metric threads as per IS : 4218/1967 with its latest

amendments.

(ii) The dimensions of the bolts & nuts and tolerances should conform to IS: 1363 with

their latest amendments in all respect. The eccentricity and angular errors of various

elements shall be within specified limits as per IS: 1367/1967 with its latest

amendments the bolts & nuts shall be free from forging and threading defects such as

cuts, spats. burns, bulging taper eccentricity, loose fill etc. which may affect their

serviceability.

(iii) The colt heads and nuts shall be chamfered on one face only and other face shall be

machined made.

(iv) Mechanical property requirement of tester shall conform to IS: 1367 (Part-III)


Specification: Gr.B

- 14 –

1979 property class 4.6 for bolts & property class-5 for nuts as per

IS: 1367 (Part VI) —1980.

(v) The bolts & nuts shall be supplied in well-cleaned conditions and suitably protected

against corrosion in individual bags of 50 kgs.

2. ACCEPTANCE TESTS:

The bidder should furnish test certificate from his awn/recognized Govt. Laboratory giving

the results of tests as per IS: 1367 (Part-Ill) —1979 & IS: 1367 (Part-VI) 1980 The test

certificate shall be in respect of the following for all sizes of both bolts & nuts as applicable

given below:-

i) Dimensional particulars (Sampling Ifl accordance with IS: 2614 for both bolts & nuts

(tolerance as per drawing).

ii) Tensile strength test on full size (for bolts minimum 400 NI Sq.mm and for Nuts Proof

Stress test Mm 610 N/Sq. mm).

iii) Power load test on full size bolts and M-12-51400 N for 15 Sec.

iv) Head soundness tests for bolts (no fracture).

v) Brinell hardness tests or Rockwell Hardness or Vickers‘s Hardness tests for bolts min-

114 &max. 209 or mm. 67 & max. 95 or mm. 120 & max. 220 respectively. For nuts

Vickers‘s Hardness mm. 130 & max. 302.

3. PRE-DESPATCH INSPECTION AND TEST

The bidder shall arrange to carryout acceptance tests in presence of owners inspecting

officer in his own laboratory. In case testing facilities are not available at works he will

make necessary arrangements for carrying out these tests at a Govt. recognized lab at his

own expense(s) and will provide all testing arrangement for Board‘s representative to

witness the tests.

4. Markings:

On the bolt head, there shall be identification marking of the manufacturer as well as

property class ‗4.6‖. If possible property class ―5‖ shall be marked on Nuts also. Further

‗ISI‘ mark shall be marked on

Sunny Bags for proper identification.


Specification: Gr.B

- 15 –

9(i) 16 mm LT Stay Set ( Galvanized) Quantity

200 Sets

TECHNICAL SPECIFICATION OF

LT STAY SET

1. SCOPE This specification covers design, manufacture, testing of 1 6 m m GI Stay Sets .

2. GENERAL REQUIREMENTS

i) 16 MM Dia Stay sets (Galvanized) – LT Stay Set

This stay sets (Line Guy set) will consist of the following components:-

ii) Anchor Rod with one washer and Nut

Overall length of rod should be 1800 mm to be made out of 16 mm dia GS Rod,

one end threaded up to 40 mm length with a pitch of 5 threads per cm and

provided with one square GS washer of size 40X40x1.6mm and one GS

hexagonal nut conforming to IS:1367:1967 & IS:1363:1967. Both waster and nut

to suit threded rod of 16 mm dia. The other end of the rod to be made into a round

eye having an inner dia of 40mm with best quality welding.

iii) . Anchor Plate Size 200 x 200 x6 mm

To be made out of GS plate of 6 mm thickness. The anchor plate should have at

its centre 18 mm dia hole.

iv) Turn Buckle & Eye Bolt with 2 Nuts

To be made of 16 mm dia GS Rod having an overall length of 450mm, one end of

the rod to be threaded up to 300 mm length with a pitch of 5 threads per cm and

provided with two GS Hexagonal nuts of suitable size conforming toIS:1363:1967

& IS:1367:1967. The other end of rod shall be rounded into a circular eye of 40mm inner dia with proper and good quality welding.

v) Bow with Welded Angle

To be made out of 16mm dia GS rod. The finished bow shall have an over all

length of 995 mm and eight of 450 mm, the apex or top of the bow shall be bent at

an angle of 10 R. The other end shall be welded with proper and good quality

welding to a GS angle 180 mm long having a dimension of 50x50x6mm. The

angle shall have 3 holes of 18 mm dia each.

vi) Thimble


Specification: Gr.B

- 16 –

To be made on 1.5 mm thick GS sheet into a size of 75x22x40mm and shape as

per standard shall be supplied.

Average Weight of Finished 16mm Stay Sets shall be at least 7.702 KG

(Minimum) (Excluding Nuts Thimbles and Washer) 8.445 Kg. (Maximum)

3. Galvanizing

The complete assembly shall be hot dip galvanized as per ISS.

4. Welding

The minimum strength of welding provided on various components of 16mm

shall be 3100 kg . Minimum 6mm filet weld or its equivalent weld area should be

deposited in all positions of the job i.e. at any point of the weld length. The

welding shall be conforming to relevant IS:823/1964 or its latest amendment.

5. Threading

The threads on the Anchor Rods, Eye Bolts and Nuts shall be as per specification

IS; 4218:1967 (ISO Metric Screw Threads). The Nuts shall be conforming to the

requirements of IS: 1367:1967 and have dimension as per IS 1363:1967. The

mechanical property requirement of fasteners shall confirm to the properly clause

4.6 each for anchor rods and Eye bolt and property clause 4 for nuts as per IS:

1367:1967.

6. TESTS

The contractor shall be required to conduct testing of materials at

Govt./Recognized testing laboratory during pre-dispatch inspection for Tensile

Load of 3100 Kg applied for one minute on the welding and maintained for one

minute for 16 mm dia stay sets .

7. IDENTIFICATION MARK

All stay sets should carry the identification mark of the Purchaser

NESCO as applicable. This should be engraved on the body of stay rods to

ensure proper identification of the materials.

The nuts should be of a size compatible with threaded portion of rods and there

should be not play or slippage of nuts.

Welding wherever required should be perfect and should not give way after

erection.

8. TOLERANCES

The tolerances for various components of the stay sets are indicated below

subject to the condition that the average weight of finished stay sets of 16mm dia

excluding nuts, thimbles and washers shall not be less than the weight specified

above:-


GURANTEED TECHNICAL PARTICULARS OF LT STAY SETS

Sl

No.

Item

Descript

ion

Specified Parameters

Material

Section

Tolerances

Fabrication

Tolerances

Bidder’s

offer

1. Anchor Plate

6mm thick +2.5%-5%

200x200mm+1% GS Plate 6 mm thick

2. Anchor Rod

16mmdia +5%- 3%

Length1800mm+0.5% GS Round 16mm dia

Rounded Eye 40 mm inside dia +3% Threading

40mm+11%-5%

GS Round 16mm dia

3. Turn Buckle Bow

16mm dia +5%-3%

995mm+1% 16mm dia GS Round

16mm dia.

Length180mm +1%

50x50x6mm GS Angle

4. Eye Bolt Rod

16mm dia +5%-3%

Length 450mm + 1% GS Round 16 mm dia

Threading 300mm +1% Round Eye 40mm

inside dia+3%

5 Galvanisatio

n thickness

All galvanization shall be carried out in accordance with IS: 2629 . The weight of Zinc

deposited shall be in accordance with IS: 2629 and shall not less than 0.61 kg/m² with a

minimum thickness of 86 microns for items of thickness more than 5 mm, 0.46kg/m²(64

microns) for items of thickness between 2 mm & 5 mm& 0.33kg/m²(47 microns) for

items less than 2 mm thickness.

a Anchor Plate

b Anchor

Rod

c TurnBuckle

Bow

d Eye Bolt Rod

6 Thimble 2 nos. to be made of 1.5 mm thick G.S Sheet into a size 75x22x40 mm & shape as per standard.

One G.S Hexagonal Nut confirming to IS:1363 & 1367 with one square washer of size 50x50x6 mm (G.S) along with Anchor Rod.

Two G.S Hexagonal Nuts of suitable size along with Eye Bolt Rod.

Specification: TN/3722/14.3.11/ Gr.B

- 17–


Specification: Gr.B

- 18–

9(ii) 20 mm HT Stay Set ( Galvanized) Quantity

300 Sets

10(i) 7/12 SWG G.I Stay Wire Quantity

1000 Kg

TECHNICAL SPECIFICATIONS

STAY WIRE (7/12 SWG)

1. Application Standards

Except when they conflict with the specific requirements of this specification, the

G.I Stay Stranded Wires shall comply with the specific requirements of IS: 2141-

1979. IS: 4826-1979 & IS: 6594-1974 or the latest versions thereof.

2. Application and Sizes

a) The G.I. stranded wires covered in this Specification are intended for use on

the overhead power line poles, distribution transformer structures etc.

b) The G.I stranded wires shall be of 7/12 SWG 7/2.5 mm for LT lines standard

sizes.

3. Materials

The wires shall be drawn from steel made by the open hearth basic oxygen or

electric furnace process and of such quality that when drawn to the size of wire specified and coated with zinc, the finished strand and the individual wires shall be of uniform quality and have the properties and characteristics as specified in

this specification. The wires shall not contain sulphur and phosphorus exceeding 0.060% each.

3.1 Tensile Grade

The wires shall be of tensile grade 4, having minimum tensile strength of 700

N/mm² conforming to 1S:2141. 3.2 General Requirements

a) The outer wire of strands shall have a right-hand lay.

b) The lay length of wire strands shall be 12 to 19 times the strand diameter.

Specification: Gr.B

- 18–


3.3 Minimum Breaking Load & Galvanising

The minimum breaking load of the wires before and after stranding shall be as

follows:

No. of Wires & Const.

Wire Dia (mm)

Min. breaking load of the

Single wire

before

stranding (KN)

Min. breaking load

of the standard

wire (KN)

7 (6/1) 2.5 3.44 21.40

Minimum weight of

zinc coating

before

stranding

490 gm/mm2

490 gm/mm2

490 gm/mm2

Minimum weight of

zinc coating

before

stranding

475 gm/mm2

475 gm/mm2

475 gm/mm2

4. Construction

a) The galvanized stay wire shall be of 7-wire construction. The wires shall be so

stranded together that when an evenly distributed pull is applied at the ends of completed strand, each wire shall take an equal share of the pull.

b) Joints are permitted in the individual wires during stranding but such joints

shall not be less than 15 metres apart in the finished strands.

c) The wire shall be circular and free from scale, irregularities, imperfection,

flaws, splits and other defects.

5. Tolerances

A tolerance of (+) 2.5% on the diameter of wires before stranding shall be

permitted.

6. Sampling Criteria

The sampling criteria shall be in accordance with IS :2141.

Specification: Gr.B

- 18–


7. Tests on Wires before Manufacture

i) The wires shall be subjected to the following tests in accordance with IS :2141.

a) Ductility Test

b) Tolerance on Wire Diameter

ii) Tests on Completed Strand

The completed strand shall be tested for the following tests in accordance with

IS:2141.

a) Tensile and Elongation Test: The percentage elongation of the

stranded wire shall not be less than 6%.

b) Chemical analysis

c) Galvanizing Test

The Zinc Coating shall conform to "Heavy Coating" as laid down in 1S:4826

8. Marking

Each coil shall carry a metallic tag, securely attached to the inner part of the coil

bearing the following information:

a) Manufacturers name or trade mark

b) Lot number and coil number

c) Size

d) Construction

e) Tensile Designation

f) Lay

g) Coating

h) Length

i) Mass

j) ISI certification mark, if any

9. Packing

The wires shall be supplied in 75-100 Kg. coils. The packing should be done in

accordance with the provisions of IS:6594


Specification Gr.B

23

GURANTEED TECHNICAL PARTICULARS STAY

WIRE (7/12 SWG)

Sl.

No.

GENERAL TECHNICAL

PARTICULARS

Specified Bidder‘s offer

1 Nominal diameter of wire in mm 2.5

2 Tolerance in diameter in mm 2.5%

3 Minimum breaking load in Kg 2331.07

4 Tensile strength Kgf/mm² 71.40

5 Overall diameter of stranded wire in mm 7.50

6 Sectional Area (in mm².) 44.19

7 Coating Test

a Type of zinc coating whether heavy or light Heavy

b Weight of coating in g/m² 476

8a Length of wire in each coil in mtr. 298

b Tolerance + 5%

9 No. of dips the coating is able to withstand

as 18 ± 20ºC 3 dip in min.

10 Adhesion Test (Wrap Test at 1 turn per second coiling while stress not exceeding

% nominal tensile strength)

a Min. complete turn of wrap To be

specified by

bidder

b Dia of mandrel on which wrapped - do -

11 Bend Test

a Angle - do -

b Dia round a format to be bent - do -

12 Freedom from defect - do -

13 Chemical composition the MS Wire used shall not exceed

a Sulphur 0.060% - do -

b Phosphorous 0.065% - do -

14a Weight of wire in Kg/Km 310

b Tolerance + 5%


Specification Gr.B

24

Sl.

No.

Particulars Specified Bidders Offer

1. Binding Wire IEC : 1089/IS-398

2. Chemical composition of Binding Wire

Aluminium 99.5% minimum Copper, silicon and iron

0.5% maximum.

3. The surface of the wire shall be

smooth and free from all

irregularities and imperfections.

Its cross section shall closely

approximate that of a true circle.

4. Diameter of Wire (mm) Minimum

Nominal

Maximum

3.51

3.53

3.55

5. Weight of

wire kg/km

26.45

6. Breaking load (KN) 1.57

10(ii) 7/10 SWG G.I Stay Wire Quantity

800 Kg

10(iii) No-8 G.I. Wire Quantity

20500 Kg

11. Aluminium Binding Wire Quantity

EC grade hard drawn Aluminium rods of 3.53mm diameter complying with IEC : 1089/IS-398

1000 Kg.

TECHNICAL SPECIFICATION ALUMINIUM BINDING WIRE


Specification Gr.B

25

12. Tinned Copper Fuse

Wire

Quantity

in Kg.

Size of T.C

wire (dia. in

SWG /mm)

Fusing

current

(Approx.) in

Amp.

Annealed Tinned Copper Fuse Wire conforming to IS: 9926/1981 of Capacity,

diameter in SWG & mm ,approximate

fusing current in Amp. mentioned

against tabulation of the following rating

:

Specified by

Bidder

Specified by

Bidder

i) 5 Amp. 500 Kg.

ii) 10 Amp. 700 Kg.

iii) 20 Amp 700 Kg

iv) 63 Amp 700 Kg.

v) 102 Amp. 2000 Kg

vi) 200 Amp. 1000 Kg.

13. Kit-Kat Fuse Quantity

Kit Kat Fuse unit with porcelain base & carrier of

reputed brand complete with extended terminals as per

relevant ISS : 2086/1993, Amendment-I of following

ratings: Reputed make & best quality

i) 300 Amp. 1000 nos.

ii) 400 Amp. 400 nos.


Specification Gr.B

26

15

.

Polypropylene Rope Quantity

Polypropylene rope (3-strand hawser –laid and 8-stand

plaited ) confirming to IS 5175/1992, Amendment-1, 2nd

Revision with ISI mark.

i) 16 mm dia. 400 Kg

ii) 20 mm dia. 600 Kg

iii) 25 mm dia. 600 Kg

14. Aluminium Cable Socket Quantity

Cable Lugs of Aluminium tubular terminal end of any

reputed make with ISI mark for crimping to all

conductors of following sizes.

i) 120 Sq. mm 4000 nos.

ii) 150 Sq. mm 3000 nos.

iii) 185 Sq. mm 4000 nos.

iv) 240 Sq. mm 4000 nos.

v) 300 Sq. mm 5000 nos.

SECTION - IV TECHNICAL SPECIFICATION OF ... EASTERN ELECTRICITY SUPPLY COMPANY OF ODISHA LIMITED...

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