Prov permanent restoration 11 KV HT network in Jwalapur area damage due to heavy rain land slide during 2023 by interlinking 11KV Jwalapur feeder and 11KV Pandoh Rural feeder to maintain reliable supply in area in ES Bhatwari u ESD HPSEBL Nagwain

11kV HT Line :-

Equipments and switchgear:-

Supply of 11KV 400 A, 25kA G.O. switches complete with manually operated equipment and accessories required for their satisfactory operation for their use on distribution sub-station and tapping /sectionalizing points of 11 KV lines

Supply of 11KV, outdoor, open, dropout (D.O.) explusion type fuse units, complete with manually operated equipment and accessories required for their satisfactory operation for their use on distribution sub-station and tapping /sectionalizing points of 11 KV lines.

Poles & Conductor/cable :-

Supply of RCC pipe (Muff) ISI marked suitable for different sizes of steel poles. 2000 mm in length and 25 mm thick with 250 mm internal dia duly fabricated by using un-galvanized MS wires of 12 SWG rings and 6 mm MS round in vertical direction conforming to ISI 458-1988 or latest version if any.

Insulators:-

Supply of 11 KV Disc insulator B&S type conformimg to IS-731/1971 all latest version thereof for suspension & tension string ball and socket type having pin ball. The minumum and maximum creepage distance with diameter of insulator- 225 mm & having electromechanical strength 90KN. The insulator shall have W type phosphors bronze security clips for ball socket porcelain conforming IS: 2486-1971 (90KN) complete in all respect. Moderately polluted atmospheres Creepage distance 320mm

Fittings and accessories :-

Stay Sets:-

Supply of Stay Set Suitable for 11KV made of M.S. Round 1800mm in length, 18mm dia having threads up to 300mm on one end with one nut and one check nut to avoid slippage and eye of 40mm dia on other side and welded confirming to REC specification. Elbow made of MS channel iron 75x40x6mm, 250mm long and M.S. Round 18mm dia, vertical height 450mm, both ends bend after putting in two holes in channel iron taking the ends out 25mm minimum in length and welded with channel iron. One anchor of Angle Iron 65x65x6mm, 750mm in length with one hole of 20mm dia in the centre. The complete stay set shall be painted with superior quality black Japan paint.

Stay Wire:-

Supply of Galvanized Stay Strand conforming to ISS-2141/1992 Edition 2002-05 (with upto date amendments) with heavy coating Zinc hot Dip Galvanized as per ISS-4826/1979 (2001-06) (latest)of following grade and size:- Grade -4 Size 7/3.15mm (7/10SWG)

EARTHING:-

Supply of Earthing set suitable for HT line/Earthing of metering unit made of GI pipe 40 mm dia (internal dia) wall thickness 3.25 mm medium quality pipe of standard make conforming to IS: specifications 2500 mm long with GI Socket closed at top pipe shall have holes of 12 mm dia every 150 mm apart throughout the length and staggered diameterically. Full clamps of MS Flat 40x3 mm fitted at top end of the pipe along with bolts and nuts size 50x12 mm and washers for fixing the clamp on the pipe. The bottom end of the pipe shall be tapered cut at 45 degree.

2340 mm Long for 11kV X-arm

2125 mm long for x-bracing set

1800 mm for belting

450 mm for belting

2800 mm for G.O. Switch and D.O. Fuse Unit

460 mm for GO switch handle supporting

Supply of ISI marked Galvanised Mild Steel wire conforming to ISS-280/1978/2006 (with up to date amendments ) for general engineering purpose, having fine finish, hot dip galvanised, with heavy coating of Zinc as per ISS-4826/1979 (2001-06)(latest) in soft condition and of size 4.00 mm (8 SWG)

Supply of M.S. Hexagon Bolts and Nuts with washers conforming to ISI-1363-1992 off size

Supply of Galvanised steel barbed wire of 9.8 kg /100metre

Supply of Half Clamp (MS Flat 50x6mm)

Supply of Full Clamp (MS Flat 50x6mm)

Supply of Aluminium Paint for all poles and steel fitting

Erection Part:-

11kV HT Line :-

Erection of GO switch & dropout (D.O.) explusion type fuse units on tapping/Line structure

Erection of Stay Set HT (Digging of pit, fixing of stay rod, filling of pit , nozzeling & tighting)

Erection of Earthing set for HT Line (Digging of pit, fixing of GI wire to the earth system & filling of pit)