“GROUP B, C, D, E, F, G, H - North Eastern Electricity ... · PDF fileBack Clamp for 33 KV ‘V’ Cross arm: Back clamp for 33 KV‘V‘ cross arm made out of 50x8 mm MS Flat. After

TECHNICAL SPECIFICATION

. OF ELECTRICAL MATERIALS

“GROUP – B, C, D, E, F, G, H” Details of require Materials:

Sl No Item Description Unit Quantity

1 11 KV "V" Cross-Arms No 2500

2 33 KV. "V' Cross Arms. No. 600

3 11 KV Pole Top Bracket No. 1250

4 33 KV. Pole Top Bracket. No. 600

5 Back Clamp for 33KV V Cross Arm No. 600

6 Back Clamp for 11KV V No 1471

7 HT Stay Clamps Pair 1107

8 LT Stay Clamp Pair 11321

9 J&L Bolt & Nut for 90lb Rail pair 100

10 33 KV. "V' Cross Arms (GI) No. 600

11 33 KV. G.I. Pin. No. 1100

12 33kv Hardware Fittings(B&S) Set 300

13 11 KV "V" Cross-Arms(G.I) No 3971

14 11 kv Hardware Fittings(T&C) Set 7540

15 11kv Hardware Fittings(B&S) Set 1250

16 11 KV G.I. Pin. No. 7488

17 11 KV Pole Top Bracket(G.I) No 3706

18 40mm G.I. Earthing Device No. 3666

19 20 mm H.T. Stay Set. Set 3607

20 16 mm L.T. Stay Set. Set 12571

21 L.T. G.I. Pin No 1250

22 16mm MS Nut Bolts with Washer

(i) M16x75 Nuts & Bolts Kg 5050

(ii) M16x100 Nuts & Bolts Kg 5750

(iii) M16x125 Nuts & Bolts Kg 8950

(iv) M16x150 Nuts & Bolts Kg 8057

(v) M16x175 Nuts & Bolts Kg 5600

(vi) M16x200MS Nuts & Bolts Kg 5000

(vii) M16 Washer Kg 160

23 Distribution Box for 25KVA No 109



26 11Mtr long RS Joist Pole(150X150) No 100





31 7/10 SWG G.I. Stay Wire Kg 36072

32 7/12 SWG G.I. Stay Wire Kg 97624

33 Piercing connector No. 1250

34 Suspension Clamp No. 23569

35 Dead end Clamp No. 16546

36 Pole Clamp with Eye Hook No 35115

NB: 1. Bidders should put their authorized signature with office seal on each page of

the documents.

2. Bidders should put their offer in the Guaranteed particulars column furnished

in the tender documents.

3. Purchaser may ask to the bidder who will qualify in Techno- Commercial

evaluation of the tenders for submission of Samples for verification , if

required.

4. Purchaser reserves the right to increase or decrease the above quantities

during placement of purchase order or may cancel any item/items without

assigning any reason thereof . Dy. General Manager (C&P) NESCO, Balasore, Odisha

TECHNICAL SPECIFICATION

11 KV V Cross Arm (MS) :

11 KV ‗V‗ Cross arm made out of 75x40x5 mm 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 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.

11 KV V Cross Arm (GI) :

The Cross arm is to be made out of ISMC 75x40 with 50mmx6mm flat packing on top & bottom flange

of the channel where the insulator pin is to be mounted conforming to REC construction standard &

drawing . Galvanized the V cross arm as per IS-2633/1972.(Latest Amendment) , IS :2629/1985 (1st

.

Revision).

Guaranteed Technical Particulars of 11KV 'V' Cross Arm

Sl. No.

Description

Specified

Bidders Offer

1 Type of Cross Arm ISMC 75x40

2 Channel Weight

7.14 Kg/mtr

3 Grade of Steel

FY 250

4

Steel Standard

IS:2062-1992

5

Fabrication Standard

IS:802 (part - 2) - 1978

6 Dimension

(75x40x4.8)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 (with tolerance per meter + 4%)

11.2 Kg (approx.)

33KV ‘V’ Cross arm (MS)

33 KV ‗V‗ cross arm made out of 100x50x6 mm M.S Channel as per REC Standard M-1. The cross arm

shall be fabricated out of 100x50x6 mm size channel having 7.9Kg/mtr. After fabrication the cross arm

shall be painted with two coats of Red Oxide primer, conforming to REC construction standard &

drawing

33KV ‘V’ Cross arm (GI)

33 KV ‗V‘ cross arm made out of 100x50x6 mm M.S Channel as per REC Standard M-1. The cross arm

shall be fabricated out of 100x50x6 mm size channel having 9.2 Kg/Mtr. After fabrication the cross arm

shall be Galvanized as per IS-2633/1972.(Latest Amendment) , IS :2629/1985 (1st

. Revision)conforming

to REC construction standard & drawing.

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

9.2 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.)

Back Clamp for 11 KV ‘V’ Cross arm: Back clamp for 11 KV‘V‘ cross arm made out of 50x8 mm MS Flat suitable for 9mx300 Kg PSC poles

After fabrication the cross arm shall be painted with two coats of Red Oxide primer, conforming to REC

construction standard & drawing

Back Clamp for 33 KV ‘V’ Cross arm: Back clamp for 33 KV‘V‘ cross arm made out of 50x8 mm MS Flat. After fabrication the cross arm

shall be painted with two coats of Red Oxide primer, conforming to REC construction standard &

drawing

11 KV F Clamp/ Pole top Bracket (MS) :

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

11 KV F Clamp/ Pole top Bracket (GI) :

11 KV line pole top bracket made out of 50x8 mm M.S Flat & galvanize as per IS-2633/1972.(Latest

Amendment) , confirming to REC Construction Standard.A-7 & drawing .

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

33 KV F Clamp/ Pole top Bracket : 33 KV line pole top bracket made out of 50x8 mm M.S Flat. After fabrication the cross arm shall be

painted with two coats of Red Oxide primer, confirming to REC Construction Standard.A-7 & drawing .

33 KV GI Pin ) :

33 KV GI Pin conforming to IS 2486 (part –II)/74 and suitable for 33 KV Pin Insulator having stalk

length of 300 mm & shank length 150 mm with minimum failing load of 10 KN & provision of double

nuts & a spring washer. The threading shall good finish & with standard galvanization.

GUARANTEED TECHNICAL PARTICULARS FOR 33KV G.I PIN

Slno. Description Specified Bidder’s

Offer

1 Manufacture Name & Address

2 Standard applicable specification IS 2486

3 Minimum failing load 10KN

4 Dimensions

(mm)

a) Length 450mm

b) Shank length 150mm

c) Stalk length 300mm

5 Type of

Threads

6

Threads per inch 8-9 threads per

inch

7 Type of galvanization of pin & nuts Hot Dip

8 Mass of Zinc (minimum) 690 gm/m2

9 Applicable specification IS 2633

10

No. of Nuts with each pin & its size To be submitted

by the bidder

11

No. of spring washer with each pin & its size To be submitted

by the bidder

12 Packing

Details

a) Type of

packing Heasian Bag

b)

Weight of each pin approx.(with nut & washers)

c)

No. of pins in each packing (Kg)

15 Pcs

13

Tolerance in weight

±3%

14

I.S.I Certificate License number

16

Manufacture's Trade mark with each GI Pins

17

Drawing &

Sample

To be submitted

by bidder

11 KV GI Pin ) :

11 KV hot-dipped galvanizing Pin suitable for 11 KV pin insulator , confirming to REC Construction

Standard. C- 1 and confirming to IS: 2486/Part-I/1971 & Part-II/1989, IS: 1363/1984, IS: 3063/1972,

IS:2633/1972.


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

LT GI Pin ) :

LT hot-dipped galvanizing Pin suitable for LT pin insulator , confirming to REC Construction Standard.

D-2 and confirming to IS: 2486/Part-I/1971 & Part-II/1989, IS: 1363/1984, IS: 3063/1972, IS:2633/1972.



1 Manufacturer Name & Address To be specified by

Bidder

2 Type of Pin LT

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 260 mm

14 Shank Length 125 mm

15 Stalk Length 135 mm

16 Type of Thread As per ISS

17 Thread Length As per ISS

18 Drawing enclosed

11KV H.W fittings (T&C Type) :

11 KV Hard Ware fittings Tongue & Clevis type ,confirming to REC Construction Standard C-2 and as

per drawing.

11KV H.W fittings (B&S Type) : 11 KV Hard Ware fittings Ball and socket type ,confirming to IS: 2486 (Part-II) latest amendment and as

per drawing.

33KV H.W fittings (B&S Type) : 33 KV Hard Ware fittings Ball and socket type ,confirming to IS: 2486 (Part-II) latest amendment and as

per drawing.

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 flaws

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.

(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 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.

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.

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.

20mm HT GI Stay Set :

16mm LT Stay Set:

TECHNICAL SPECIFICATION OF

LT AND HT STAY SET

SCOPE:This specification covers design, manufacture, testing and dispatch of LT Stay Sets of 16 mm and HT

stay sets 20 mm dia.

GENERAL REQUIREMENTS

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

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

Anchor Rod with one washer and Nut

Overall length of rod should be 1800 mm to be made out of 16 mm dia GI Rod, one end threaded up to

40 mm length with a pitch of 5 threads per cm and provided with one square GI washer of size

40X40x1.6mm and one GI hexagonal nut conforming to IS:1367:1967 & IS:1363:1967. Both washer and

nut to suit threaded 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.

Anchor Plate Size 200 x 200 x6 mm

To be made out of GI plate of 6 mm thickness. The anchor plate should have at its centre 18 mm dia hole.

Turn Buckle & Eye Bolt with 2 Nuts

To be made of 16 mm dia GI 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 GI 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.

Bow with Welded Angle

To be made out of 16mm dia GI 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 GI angle 180 mm long having a dimension of 50x50x6mm. The angle

shall have 3 holes of 18 mm dia each.

Thimble

To be made on 1.5 mm thick GI 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)

20 mm Dia Stays Sets for 33 Kv,11 KV Lines (Galvanized) HT Stay Set The Stay Set (Line Guy Set) will

consist of the following components: Anchor Rod with one Washer and Nut

Overall length of Rod should be 1800mm to be made out of 20 mm dia GI rod one end threaded up

to 40 mm length with a pitch of threads per cm. And provided with one square G.I Washer of Size

50x50x1.6mm and one GI Hexagonal nut conforming to IS: 1363:1967 & IS:1367:1967. Both washer and nut

to suit the threaded rod of 20mm. The other end of the rod to be made into a round eye having an inner dia of

40mm with best quality of welding. Dimensional and other details are indicated and submitted by bidders for

owner‟s approval before start of manufacturing.

Anchor Plate Size 300 x 300 x 8 mm

To be made out of G.S. Plate of 8 mm thickness. The anchor plate to have at its centre 22mm

dia hole.

Turn Buckle, Eye Bolt with 2 Nuts.

To be made of 20 mm dia G.I Rod having an overall length of 450 mm. One end of the rod to be threaded

up to 300 mm length with a pitch of 4 threads per cm. The 20 mm dia bolt so made shall be provided with two

G.I Hexagonal nuts of suitable size conforming to IS: 1363:1967 & IS: 1367:1967.The other end of the rod

shall be rounded into a circular eye of 40mm inner dia with proper and good quality of welding. Welding

details are to be indicated by the bidder separately for approval.

Bow with Welded Channel:

To be made out of 16mm dia G.I Rod. The finished bow shall have and overall length of 995 mm ad height

of 450 mm. The apex or top of the bow shall be bent at an angle of 10R. he other end shall be welded with

proper and good quality welding to a G.I Channel 200 mm long having a dimension of 100x50x4.7 mm.

The Channel shall have 2 holes of 18 mm dia and 22 dia hole at its centre as per drawing No.3 enclosed

herewith.

Thimble 2 Nos.

To be made of 1.5 mm thick G.Isheet into a size of 75x22x40mm and shape as per standard.

Galvanizing

The complete assembly shall be hot dip galvanized.

Welding

The minimum strength of welding provided on various components of 16mm and 20 mm dia stay sets shall be

3100 kg & 4900 kg respectively. 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.

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.Average weight of finished 20 mm Stays Set: 14.523 Kg.(Min) (Excluding Nuts Thimble & Washer)

:15.569 Kg.(Max.)

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/4900Kg. applied for one minute on the welding and

maintained for one minute for 16 mm and 20mm dia stay sets respectively.

IDENTIFICATION MARK

All stay sets should carry the identification mark of the Purchaser (NESCO) 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.

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 (To be submitted along with Offer)

Sl

No.

Item

Description

Specified Parameters

Section

Tolerances

Fabrication

Tolerances

Material

1

Anchor

Plate

6mm thick +2.5%- 5%

8mm thick +2.5%-5%

200x200mm+1%

300x300mm+1%

GI Plate 6 mm thick

GI Plate 8 mm thick

LT Stay Set

HT Stay Set

2

Anchor Rod

16mm dia

+5%-3%

20mm dia

+3%- 2%

Length

1800mm+0.5%

Rounded Eye

40 mm inside dia +

3%

Threading

40mm+11%-5%

Length

1800mm+0.5%

Round Eye

40mm inside dia

+3%.

Threading

40mm+11%-5%

GI Round

16mm dia

GI Round

16mm dia

GI Round

20mm dai

GI Round

20mm dia

LT Stay Set

HT Stay Set

3

Turn Buckle

Bow

16mm dia

+5%-3%

Length

995mm+1%

16mm dia

Length180mm+1%

50x50x6mm

GI Round

16mm dia.

GI Angle

G I Channel

100x50x4.7m m

LT Stay Set

HT Stay Set

Channel length

200mm + 1%

4

Eye Bolt

Rod

16mm dia

+5%-3%

20mm dia

+3% - 2%

Length 450mm

+ 1%

Threading

300mm+1%

Round Eye

40mm inside dia

+3%

Length450mm

+1%

Threading

300mm+1%

Round Eye

40mm inside dia

+3%

GI Round

16 mm dia

GI Round

20mm dia.

LT Stay Set

HT Stay Set

5 Galvanisation

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.

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

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

7/10 GI Stay Wire :

7/12 GI Stay Wire :

TECHNICAL SPECIFICATIONS 7/10 SWG and 7/12 SWG

STAY WIRE)

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 7/10 SWG( 7/3.15 mm for 11KV lines) and 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.

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

7 (6/1) 3.15 5.46 34.00

7 (6/1) 4.0 8.80 54.90

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.

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.

GURANTEED TECHNICAL PARTICULARS STAY WIRE (7/10 SWG)

Sl.

No.

Description Specified Bidder’s

offer

1. Manufacturer‘s name & address To be specified by

the Bidder

2 Nominal diameter of wire in mm 3.15

3 Tolerance in diameter in mm + 2.5%

4 Minimum breaking load in Kg 3697.50

5 Tensile strength Kgf/mm² 71.40

6 Overall diameter of stranded wire in mm 9.45

7 Sectional Area (in mm².) 70.16

8 Coating Test

a Type of zinc coating whether heavy or light Heavy

b Weight of coating in g/m² 476

9 a Length of wire in each coil in mtr. 193

b Tolerance + 5%

10 No. of dips the coating is able to withstand

as 18 ± 20ºC

3 dip in min.

11 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 -

12 Bend Test

a Angle - do -

b Dia round a format to be bent - do -

13 Freedom from defect - do -

14 Chemical composition the MS Wire used

shall not exceed

a Sulphur 0.060% - do -

b Phosphorous 0.065% - do -

15 a Weight of each coil in Kg 70 to 100

b Tolerance + 5%

16 a Weight of wire in Kg/Km 465

b Tolerance + 5%

17 Standard according to which the solid wire is manufactured

and tested

ISS: 2141/1992 &

ISS: 4826/1979

GURANTEED TECHNICAL PARTICULARS STAY WIRE (7/12 SWG)

Sl.

No.

Description Specified Bidder’s

offer

1. Manufacturer‘s name & address To be specified by

the Bidder

2 Nominal diameter of wire in mm 2.50

3 Tolerance in diameter in mm + 2.5%

4 Minimum breaking load in Kg 2331.07

5 Tensile strength Kgf/mm² 71.40

6 Overall diameter of stranded wire in mm 7.50

7 Sectional Area (in mm².) 44.19

8 Coating Test

a Type of zinc coating whether heavy or light Heavy

b Weight of coating in g/m² 476

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

b Tolerance + 5%

10 No. of dips the coating is able to withstand

as 18 ± 20ºC

3 dip in min.

11 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 -

12 Bend Test

a Angle - do -

b Dia round a format to be bent - do -

13 Freedom from defect - do -

14 Chemical composition the MS Wire used

shall not exceed

a Sulphur 0.060% - do -

b Phosphorous 0.065% - do -

15 a Weight of each coil in Kg 70 to 100

b Tolerance + 5%

16 a Weight of wire in Kg/Km 310

b Tolerance + 5%

17 Standard according to which the solid wire is manufactured

and tested

ISS: 2141/1992 &

ISS: 4826/1979

GI Clamp for HT Stay set :

HT stay clamp suitable for PSC poles made out of 50x8 mm MS Flat, confirming to latest IS Specification.

GI Clamp for LT Stay set :

LT stay clamp suitable for PSC poles made out of 50x6 mm MS Flat, confirming to latest IS Specification.

40mm dia GI Earthing Device:

Technical Specifications 1. Scope :-

This specification provides for design, manufacturing, testing before dispatch, supply & delivery of Earthing

Device (Heavy Duty) (for use in Sub-station earthing).

2. APPLICABLE STANDARDS :-

The Earthing Device must be made out of 40 mm nominal Bore & 3.2 mm (Medium Gauge- No minus Tolerance allowed) wall thickness Hot Dip G.I. Pipe (as per IS ;- 1239,m Part-1, 1990 & REC construction

Standard –J-2) , ISI marked of reputed Make & 2.5 mtrs length tapered finished smooth at one end for a length

of 75 mm

& Clamp at the other end.

Staggered drills hole of 12 mm Dia of interval of 150mm shall be made before galvanization.

The GI Earthing Clamp/ Strip (C- Clamp Type) is to be of 50mm width, 6mm thickness & flange length of

65 mm in each side. This should be suitable for termination of 4 nos of GI Flat earth electrodes. The Clamp/

Strip & Earthing pipe after fabrication will be hot dip galvanized confirming to IS: 2629/85 with latest

amendments. The clamp shall have two holes in both sides suitable for 5/8 x 2‖ Bolt & provided with two GI

bolts& Nuts in each side of 5/8 x 2‖ long half threaded with spring washer as per IS: 3043/1982.The

galvanization tests are to be conducted as per IS: 2633/72 & IS: 6745/72 &

its latest amendments.

Guaranteed Technical Particulars of Earthing Device (To be submitted along with Offer)

Sl. No.

Particulars

Bidder’s Offer

1. Location of Factory or Place of Manufacture

2. Maker’s Name, Address & Country

3. Size of

a Pipe

b Earthing Strips

4. Length

5. Thickness of Pipe

6. Galvanization Process

7. Galvanization thickness

a For Earthing device

b For Connecting Flat

8. Galavanization tests to be conducted as per ISS

9. Any other Particulars ( like details of Clamp/ G.I. Bolts)

10. Details of Drawings submitted

Piercing Connector

Suspension Clamp

Dead End Clamp

Pole Clamp with Eye Hook

TECHINICAL SPECIFICATIONS FOR AB CABLE ACCESSORIES

Technical specification for insulation piercing connectors , Dead End Clamp (Anchor), Suspension Clamp , Neutral Connector & Eye hook for Arial Bunch Cables for working voltage upto and including 1100 Volts.

INSULATION PIERCING CONNRCTOR (IPC)

1.0 Scope

This specification covers the design, manufacture, assembly, testing and supply of Insulation Piercing Connectors

(IPC) making connections to Bare Messenger L.T XLPE insulated Aerial Bunched Cables rated up to1100 volts to L.T

XLPE insulated Aerial Bunched Cables / Service cable ( Twin core double insulated flat PVC Aluminium wire of

different sizes)

2.0 Standard

The design, performance and test requirements shall confirm to this specification and the following standards.

However in case of any conflict, the requirements of this specification shall prevail.

1) REC Specification 83/2010 ( Insulation Piercing Connectors)

2) NFC 33-020 ( Insulation Piercing Connectors)

3) IS 7098 part 1 XLPE insulated Cables

4) IS 398 Part IV : aluminum alloy conductors

The devices shall also be compatible with the cables of sizes & dimensions as defined in the cable

Specifications for the cables with which they are intended to be used.

3.0 Cable Data

AB Cable The standard sizes and characteristics of the phase and street lighting conductors, bare messenger wires shall be

as specified in IS: 14255-1995 and REC Specification 32/1984 of following sizes

a) 3x95 (Insulated Phase)+1x70(Bare Messenger)+1x16(Insulated street lighting) sq.mm

b) 3x50 (Insulated Phase)+1x35(Bare Messenger)+1x16(Insulated street lighting) sq.mm

c) 3x50 (Insulated Phase)+1x35(Bare Messenger)

d) 2x50 (Insulated Phase)+1x35(Bare Messenger ) sq.mm

e) SERVICE CABLE

Twin core double insulated single strand flat PVC Aluminium wire of size 2.5/4/6/10 sq mm.

4.0 Types Of Insulation Piercing Connectors(IPC)

Insulation Piercing Connectors (IPC) is used for making Tee/Tap-off/Service connectors to an ABC Line. Insulation

Piercing Connectors are designed to make a connection between the uncut main conductor and a branch cable conductor

without having to strip either cable to expose the conductor. Instead, the tightening action of the IPC will first pierce the

Insulation, and then make good electrical contact between the main end and branch conductor while simultaneously

insulating and sealing the connection.

The standard size ranges for various applications are given below:

Requirement Main Cable Size

range

Branch Cable Size

range

Insulation Piercing Connectors for

Tap off phase & Street Lighting

core

16-95 sq mm

(AB Cable)

16-95 sq mm

(AB Cable)

Insulation Piercing Connectors for

service connections

16-95 sq mm

(AB Cable)

2.5 -10 sq mm

(PVC Al service

Cable)

4.1 Marking and Embossing

The Connector shall be indelibly marked with the following information: Name or

Logo of manufacturer

Name Purchaser, Model Number

Sizes of ―Max and Min‖ Main and Branch cables for which it is suitable. The

permanence of the marking shall be permanent.

5. CONSTRUCTIONAL FEATURES OF INSULATION PIERCING CONNECTORS

The following features of Insulation piercing bare connectors are to be met for the qualification criteria

1. The connector bodies shall be made entirely of mechanical and weather resistant plastic insulation

material made of weather & UV resistant reinforced polymer and no metallic part outside the housing is

acceptable except for the tightening bolt or nuts.

2. Any metallic part that is exposed must not be capable of carrying a potential during or after connector

installation.

3. Screws or nuts assigned for fitting with IPC must be fitted with torque limiting shear heads to prevent over

tightening or under tightening While the min & max torque values are to be specified by Manufacturer,

these should not exceed 20 N mtr for IPC for main conductor < 95 sq mm and 30 N mtr for main conductor >95

but < 150 sq mm.

4. The IPC must perform piercing of Tap insulated conductor connection on Main cable simultaneously

using single bolt for tightening as multiple bolts do not ensure even tightening. Design of connector needs to

avoid the stripping of insulated tap conductor and make the connection by piercing the insulation.

5. The shear bolt/nut shall be suitable for tightening with a hexagonal spanner of 13 mm.

6. The contract blade of the connector is made of tinned copper/aluminum alloy.

7. The IPC shall be water proof and the water proof and the water tightness shall be ensured by appropriate

elastomer materials and not by grease gel or paste alone. Grease can be applied to protect the contact blade

alone and shall not be visible of the outer surface of the connector. Connector should not be dipped in grease.

8. Each IPBC should be provided with a cap to seal the cut end of the insulated Branch cable. It should be of a

design that once the connector id fitted, it shall not be possible to remove the cap without dismantling the

connector.

9. Design of IPBC should be such as to not cause damage to insulation of adjacent conductors due to vibration and

relative movement during service.

10. All the metallic parts of the connector should be corrosion resistant and there should not be any appreciable

change in contact resistance & temperature after overloads & load cycling and should be confirm to the

long duration tests specified in this standard.

6. TESTING REQUIREMENTS OF INSULATION PIERCING CONNECTORS

The following tests are intended to intended to establish performance characteristics of insulation piercing

connectors and categorized as follows:

Sr No.

Test

Type

Test

Acceptance

Test

Routine

Test

1 visual X X

2 Dimensional X X

3

Mechanical

Electrical Continuity and

Shear head & mechanical

behavior

Effect of tightening the

mechanical strength of

main core

Checking mechanical

strength of tap core

X

X

X

X

X

X

X

X

X

4

Dielectric & Water

tightness test

X

X

X

5 Climate Ageing Test X

6 Corrosion Test X

7 Electrical ageing test X

7.0 General Test Condition

Connectors to be tested shall be identified using the following elements

• Minimum marking details requested in this specification.

• The minimum and maximum operating torque of shear off head.

• Nominal torques of the re-usable tightening screws.

• Min-Max conductor range suitable for Main and Tap.

8.0 SAMPLING PLAN FOR ACCEPTANCE TESTS

Sampling Plan for acceptance tests on IPCs are as per ISO 2895-1 as mentioned below.

a) For Visual and Dimensional

Sampling Level: General Inspection Level 1

SL NO LOT SIZE SAMPLE SIZE

1 51 to 90 5

2 91 to 150 8

3 151 to 280 13

4 281 to 500 20

5 501 to 1200 32

6 1201 to 3200 50

7 3201 to 10000 80

8 10001 to 35000 125

9 35001 to 150000 200

10 150001 to 500000 315

11 500001 & over 500

b) For Mechanical and Voltage Tests

Sampling Level: Special Inspection Level S-2

SL NO LOT SIZE SAMPLE SIZE

1 51 to 90 3

2 91 to 150 3

3 151 to 280 5

4 281 to 500 5

5 501 to 1200 5

6 1201 to 3200 8

7 3201 to 10000 8

8 10001 to 35000 13

9 35001 to 150000 13

10 150001 to 500000 13

11 500001 & over 13

8.3 Type Test

For IPCs, the Type Test Report should be submitted from an Independent NABL Accredited Laboratory like

CPRI ,ERDA e.t.c / International Laboratory Accreditation Corporation, Mutual Recgnitions arrangement

(ILAC,MRA) signatory Laboratory like COFRAC The installation of the connectors shall be done in the laboratory following instructions provided by the

manufacturer.

The Test report shall include the Model Number, Applicable size Range, and GA Drawing showing the

principal parts and dimensions of the connector

The following shall constitute Type Tests for Insulation Piercing Connectors.

a) Electrical Ageing Test

b) Dielectric and Water Tightness Test

c) Mechanical Tightening Test & Shear – head behavior d) Effect

of tightening on main core

e) Effect of tightening on branch core

f) Climatic test in accordance with NFC20-540

g) Corrosion Test in accordance with NFC 33-003

8.4. Acceptance Tests

The Acceptance Tests are to be conducted as per clause no.‘6‘ above & REC Spec. 83/ 2010 and as per relevant IS

Specifications.

9.0 Drawings & Samples:

GA drawings, GTP and other particulars along with samples are to be submitted along with offer.

10.0 SUSPENSION CLAMPS

Scope

This specification covers the design, manufacture, assembly, testing and supply of Accessories for suspending

Aerial Bunched Cables rated 1100 volts and insulated with cross-linked polyethylene and

aluminum alloy bare messenger.

Description Application

a)

Suspension Clamp (as per REC

Construction standard E-34)

suitable for bare messenger AB

cable (35-70 sq mm)

For supporting a length of ABC at an

intermediate pole in a length, with

small angle of deviation.

10.1 Cable Data

The standard sizes and characteristics of the phase and street lighting conductors, bare messenger wires shall be






10.2. GENERAL REQUIREMENTS

1. Suspension clamp shall be made of aluminum alloy of designation 4635 (IS : 617-

1975) of tensile strength greater than 200 N/mm2

(20.5 kgf/ mm2

) and shall be

capable of holding aluminum alloy messenger wire of 35 sq mm or 70 sq mm compacted

AAA Conductor. The eye hooks shall be made of forged steel (IS: 2004) or mils steel (IS: 1570).

2. The clamp shall be provided with black weather-resistant plastic coating of at least 1mm thickness to

prevent the insulation of the phase conductors from chafing due to rubbing against the clamp.

3. Suspension clamp assembly shall provide sufficient flexibility to allow free movement of the clamp at both

straight runs and angle locations.

4. The suspension clamp and hardware shall have good finish and shall be free from all flaws, sharp radii of

curvature and the edges shall be suitably rounded off.

5. All ferrous fittings, eye hooks, bolts, nuts and washers shall be galvanized with Zinc conforming to grade Zn 98

of IS: 209-1966. The spring washers and nuts etc. may be electro-galvanized. Nuts shall be made of material

conforming to property Class 4.8 of IS:1367-1967 for its mechanical properties.

TEST REQUIREMENTS

1. Slip strength shall not be less than 25% of the tensile strength of the messenger wires of 25mm2

and 35mm2

sizes having tensile strengths of 7.4 KN and 10.3 KN respectively (tests to be made separately for the two

sizes).

2. Mechanical test – Tensile strength at right angle to the direction of messenger wire shall not be less than 15

KN.

TESTS

The suspension clamp shall be subjected to the following tests in accordance with the latest version of

IS:2486 (Part-I). Sampling plan as per clause no 8.0 above.

Type Tests Acceptance Tests Routine Tests

1. Slip strength test 1. Verification of dimensions

2. Mechanical test 2. Galvanising test 1.Visual examination test

3. Verification of dimensions 3. Mechanical test

4. Galvanising test

5. Visual examination test

NOTES :

I. Permissible tolerance shall be ± 5% on the indicated dimensions.

II. The supplier of the clamps shall provide necessary facilities at his works for the

acceptance tests.

10.3 Marking / Embossing

Anchoring Clamp, Suspension clamp should bear

- Manufacturers trade mark and logo

- Purchaser, NESCO

- Product Code or Reference

- Traceability Code/Batch Number


GA drawing and other particulars along with samples are to be submitted along with offer.

ANCHOR (DEAD END CLAMP)

11.0 Scope

This specification covers the design, manufacture, assembly, testing and supply of Accessories for anchoring

Aerial Bunched Cables rated 1100 volts and insulated with cross-linked

polyethylene and aluminum alloy bare messenger.

Description Application

a)

Dead end Clamp ( as per REC

Construction standard E-35)

suitable for bare messenger AB

cable (35-70 sq mm)

For fitting onto a pole for anchoring

the end of a length of ABC, or for a

major change in direction.

11.1 Cable Data

The standard sizes and characteristics of the phase and street lighting conductors, bare messenger wires shall be






11.2. GENERAL REQUIREMENTS

1. The Dead End clamp shall be made of high strength Aluminium Alloy of designation 2280 (IS:617-1975) of

tensile strength not less than 250 N/mm2

(27 kgf/mm2

). The U-bar shall be made of hot dip galvanised steel. The

eye-hooks shall be made of forged steel (IS:2004) or mild steel (IS:1570).

2. The clamp shall be suitable for holding both 35mm2

and 70mm2

messenger wire sizes of compacted

diameters of 7.62mm and 10.8 mm.

3. The clamp shall have a cone for holding the messenger wire and it shall automatically grip the messenger

wire due to tension of the wire.

4. The clamp shall be free from all flaws, irregularities and sharp radii of curvature.

5. All ferrous fittings, eye hooks, bolts, nuts and washers shall be galvanised with Zinc conforming to grade Zn 98 of IS:209-1966. The spring washers and nuts etc, may be electro-galvanised. Nuts shall be made of

material conforming to property class 4.8 of IS:1367 for its mechanical properties.

TEST REQUIREMENTS

1. Slip strength shall not be less than 90% of the tensile strength of the messenger wires of 35mm² and 70mm²

sizes having tensile strengths of 7.4 KN and 10.3 KN respectively (tests to be made separately for the two

sizes).

2. The mechanical strength of the Dead End clamp shall not be less than 2000 Kg. The test shall be made

separately for the clamp and the eye hook.

TESTS

The Dead End clamp shall be subjected to the following tests in accordance with the latest version of

IS:2486(part-10. Sampling plan shall be as per clause no.08.

Type Tests Acceptance Tests Routine Tests

a. Slip strength test a. Verification of dimensions a.Visual examination test

b. Mechanical test b. Galvanising test

c. Electrical resistance test c. Mechanical test

d. Heating cycle test

e. Verification of dimensions

f. Galvanising test

g. Visual examination test

NOTES

I. Permissible tolerance shall be ± 5% on the dimensions indicated.

II. The supplier of dead-end clamps shall provide necessary facilities at his works for the acceptance tests.

11.3 Marking / Embossing

Anchoring Clamp, Suspension clamp should bear

- Manufacturers trade mark and logo

- Purchaser, NESCO

- Product Code or Reference

- Traceability Code/Batch Number


GA drawing and other particulars along with samples are to be submitted along with offer.

12.0 EYE HOOKS

a) Eye hooks shall be of Hot dip GI as per REC construction standard E-35 (Type – A)

b) It should be made of forged hot dip galvanized steel as per IS-1570

c) The clamp corrosion resistance should conform to standards IS 2629 & IS 2633.

d) Minimum breaking Load should be 20 KN.

12.1 Type Test

a) Mechanical strength

b) Galvanizing test

12.2 Acceptance Tests

a) Verification of dimensions. b)

Galvanizing test

c) Minimum breaking load (KN)

The Acceptance Tests are to be conducted as per REC Spec. and as per relevant IS Specifications &

sampling plan as per clause no.08 above.


GA drawing, GTP and other particulars along with samples are to be submitted along with offer.

GUARANTEED TECHNICAL PARTICULARS FOR INSULATION PIERCING

CONNECTOR

Sl. No.

Description Guaranteed particulars to be submitted by

the Bidder along with offer

1 Name and address of the Manufacturer

2

Is Manufacturer of accessories as ISO 9001-2000

a) Copies of certificate enclosed b) Are

GA drawing enclosed

c) Are Samples are submitted

3 Applicable standard

4 Type of connectors

5 Application

6

Is any metallic part carrying potential

in operation exposed during

installation

7

Are end caps of branch cable a)

Slide on type

b) Rigid type

8 Are torque limiting shear head

provided to tightening bolts

9

Range of cable sizes accommodated

for main and branch

10 Min and Max torque defined

11

Torque for establishing connection

between main and branch

12

Material used for teeth

13 Surface finish of teeth

14

Maximum tensile load for no

breakdown of main conductor(cross

section)

15 Max. tensile load on branch conductor

for no break/slippage

16 Voltage withstand under water

emersion

17 No. of cycles

18 Max temp at each cycle

19 Marking and embossing on the

connector

GUARANTEED TECHNICAL PARTICULARS FOR SUSPENSION CLAMP FOR BARE

MESSENGER WIRE

Sl. No.

Description

Guaranteed particulars to be submitted by

the Bidder along with offer

1

Name and address of the manufacturer

2

Applicable standard

3

Type of clamp

4

Type of design

5

Voltage Grade(kV)

6 Type & grade (metallic/non-metallic material)

8 Type of hot dip galvanizing & thickness

of Zinc coating

9

Marking

10

Colour of non-metallic parts

11

Dimensions

12

Approximate weight

13

Minimum Breaking Load (KN)

14

Maximum allowable load(KN)

15 Max. angle of deviation of conductor

(degrees)

16

Method of casting

17

Are GA drawing & samples enclosed

GUARANTEED TECHNICAL PARTICULARS FOR DEAD END CLAMP FOR BARE

MESSENGER WIRE

Sl..

Description

Guaranteed particulars to be submitted by

the Bidders

1

Name and address of the manufacturer

2

Applicable standard

3

Type of clamp

4

Type of design

5

Voltage Grade(kV)

6 Type & grade (metallic/non-metallic

material)

7 Type of hot dip galvanizing & thickness of Zinc coating

8

Marking

9

Colour of non-metallic parts

10

Dimensions

11

Approximate weight

12

Ultimate tensile strength(KN)

13

Maximum allowable load(KN)

14

Slip Strength (KN)

15

Method of casting

16

Operating temperature (deg.cent)

a) Continuous Operation

b) Short circuit condition

17

Are GA drawing & samples enclosed

Guaranteed Technical Particulars of Eye Hook

Sl. No.

Description

Guaranteed Technical Particulars submitted by the

bidder

1

Name and Address of the Manufacturer

2 Type of Hooks

3 Type of Hot Dip Galvanizing Thickness of Zinc Coating

4 Dimensions in mm

5 Net Weight in Kg

6 Ultimate tensile strength

7 Are GA drawing & samples enclosed

16 mm dia. Hexagonal Bolts & Nuts and Washer (M.S)

16 mm diameter MS Nuts and Bolts black hexagonal As per IS: 1387 (Part-II) Gr.-4/4.6 of following size.

M16x75 Nuts & Bolts

i) M16x100 Nuts & Bolts

ii) M16x125 Nuts & Bolts

iii) M16x150 Nuts & Bolts

iv) M16x175 Nuts & Bolts

v) M16x200MS Nuts & Bolts

vi) M16 GI Washer

Washers shall be round of thickness 1.5 mm suitable for 16 mm dia. bolts.

Specification finished products:

1. The bolts & Nuts shall be ISI Marked Mild Steel 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) 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.

ACCEPTANCE TESTS:

The bidder should furnish test certificate from recognized Govt. Laboratory ( NABL accredited) 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.

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 Gunny Bags for

proper identification.

J&L Bolt & Nut for 90lb Rail

Bidder should offer J&L Bolt & Nut of specified quantity suitable for 90lb Rail, conforming latest IS Specification.

J BOLT

J Bolt shall be supplied with one full Nut & round Washer. The material of the bolts shall be steel to ISO

272,885,888,4759/1 and shall meet the requirements for mechanical properties detailed in ISO 272,885,888,4759/1.

Associated Nut shall confirm with ISO 272,885,888,4759/1.

L BOLT

L Bolt shall confirm with BS 1494, except that the bolts shall be 100mm long and they shall be supplied with M16 threads

to ISO:68,261,262,724,965/1,965/2, coarse pitch, free fit, class 7H/8g, Each bolt shall be supplied with one full Nut.

TECHNICAL SPECIFICATION OF R.S Joist Pole

Applicable Standards:

This specification covers design, manufacture, testing and supply of following R.S Joists

Slno. Item Description Unit Quantity

1 11Mtr long (150x150)mm RS Joist (34.6Kg/Mtr) No. 100





2.0 Standards:

The R.S Joists shall comply with the requirements of latest issue of IS – 2062 Gr – A except where specified

otherwise.

3.0 Climatic Conditions :

The climatic conditions at site under which the store shall operate satisfactory, are as follows

Maximum temperature of air in shade 45º c

Maximum temperature of air in shade 0 c


Maximum rain fall per annum 2000mm


Maximum ambient temperature 45º c

Maximum humidity 100%

Av. No. of thunder storm days per annum 70%

Av. No. of dust storm per annum 20

Av. Rain fall per annum 150mm

4.0 Rolled Steel Joists

The Rolled Steel joist (RSJ) support structures shall be fabricated from mild steel, grade A and in lengths

dictated by design parameters .

4.1 MECHANICAL PROPERTIES:

Tensile Test : Requirement as per IS:2062/

1999 Grade-A Yeild Stress(MPa) Min250 Tensile Strength(MPa) Min410 Lo=(5.65√So)Elongation% Min23 Bend Test Shall not Crack

4.2 CHEMICAL PROPERTIES: Chemical Composition Requirement as per IS:2062/

1999 Grade-A

Grade A

Chemical Name Fe-410W A

Carbon(%Max.) 0.23

Manganese(%Max.) 1.5

Sulphur(%Max.) 0.050

Phosphorous(%Max.) 0.050

Silicon(%Max.) 0.40

Carbon Equivalent(%Max.) 0.42

Deoxidation Mode Semi-killed or killed

Supply condition As rolled

4.3. However, In case of any discrepancy between the above data & the relevant ISS, the values indicated in the

IS shall prevail.

4.4. The Acceptance Tests shall be carried out as per Relevant ISS.

5.1 150x150mm & 116x100mm RS Joists:

RS Joists of Specific Weight 34.6kg/mtr and 23.0Kg/mtr with relevant length shall have to be supplied as

per IS:2062;2006 Grade‖A‖ , IS:808;1989/2001, IS1608:1995 & IS:12779-1989 and their latest

amendment if any complying the required Dimension, Weight, Chemical & Mechanical properties

confirming to the relevant IS, as per the Tolerance given Below.

5.2. APPLICABLE TOLLERANCES :

1. Length of each pole = + 100mm / - 0 % As per relevant IS: 12779-1989

(With proportionate change in no of Poles)

2. Specific Weight of RS Joists = ±2.5% As per relevant IS:

1852/1985

3. Weight for whole lot of supply for all categories = ±3.0% As per relevant IS: 12779-1989 for both type of

RS Joists.

GUARANTEED TECHNICAL PARTICULARS (To be submitted along with offer)

Particulars

Bidder’s Offer

(150x150)mm RS

Joist

(116x100)mm RS

Joist

Length of Joist in Mtr with +100mm/-0%

Tolerance

Weight kg/m with±2.5% Tolerance

Sectional Area (cm2)

Depth(D) of Section (mm) with +3.0mm/ -

2.0mm Tolerance as per IS 1852-1985

Width (B)of Flange (mm) with ±2.5mm

Tolerance for116 x 100 mm ISMB &

±4.0mm Tolerance for 150 x 150 mm

ISHB IS 1852-1985

Thickness of Flange (Tf) (mm)

with±1.5mm Tolerance

Thickness of Web(Tw) (mm) with±1.0mm

Tolerance

Corner Radius of fillet or root (R1) (mm)

Corner Radius of Tow (R2) (mm)

Moment of Inertia

Ixx (cm4)

Iyy (cm4)

Radius of Gyration (cm)

Rxx

Ryy

Modulus of Section

Zxx(cm3)

Zyy(cm3)

Flange Slope(α) in Degree

Tolerance in Dimension

Distinct Non-Erasable Embossings to be

made on each R.S. Joist

a)Name & Logo of the Manufacturer.

b)B.I.S Logo(ISI Mark) if applicable.

c)Size

However, In case of any discrepancy between the above data & the relevant ISS, the values indicated in the

IS shall prevail. The Acceptance Tests shall be Carried out as per Relevant ISS.

The RS Joists shall be manufactured confirming to the relevant IS with Manufacturer‘s name/logo &

B.I.S Logo if applicable embossed on it.

Documents

“GROUP B, C, D, E, F, G, H - North Eastern Electricity ... · PDF fileBack Clamp for 33 KV ‘V’ Cross arm: Back clamp for 33 KV‘V‘ cross arm made out of 50x8 mm MS Flat. After