Repairing and maintenance of i) 33KV Overhead Line (Ray Colliery feeder) from 33KV Central Switching Station to 10 MVA 33/11 KV Ray Colliery substation and (ii) 33 KV double circuit Overhead Line from 132/33 KV DVC Substation to 33KV CSS

Amount

Supplying and erection of galvanised stay set for 33 KV over head lines complete with 19/ 20 mm dia X 1.8 metres long stay rod, anchor plate of size 45 cm X 45 cm X 7.5 mm thick, thimble, stay clamps, turn buckle ( 20 mm X 600 mm ), 7/ 4.00 mm dia G.I. stay wire and 33 KV strain insulator etc in cement concrete 1:3:6 (1 cement : 3 coarse sand : 6 graded stone aggregate 40 mm nominal size ) foundation including excavation and refilling etc. as required.

Supplying and erection of 33 KV pin insulator complete with large steel head G.I. pin, nuts, washers etc. as required.

Supplying and erection of a set of three 11 KV disc insulator for 33 KV over head lines with galvanised insulator fittings, ball and socket type and complete with galvanised strain clamps, bolts, nuts, washers etc. as required.

Earthing with G.I. earth plate 600 mm X 600 mm X 6 mm thick including accessories, and providing masonry enclosure with cover plate having locking arrangement and watering pipe of 2.7 metre long etc. with charcoal/ coke and salt as required.

Providing and fixing 25 mm X 5 mm G.I. strip on surface or in recess for connections etc. as required.

Erection of all aluminium conductor of 7/1.96 mm to 7/3.10 mm diameter including binding etc. as required. (02 Span X 60 Mtr./span X 3 Wire X 1.05 X 0.214 Kg/Mtr. = 80.892 Kg).

Providing and laying in position cement concrete of specified grade excluding the cost of centering and shuttering - All work up to plinth level : 1:2:4 (1 cement : 2 coarse sand (zone-III) derived from natural sources : 4 graded stone aggregate 20 mm nominal size derived from natural sources). For making steel tubular pole collar in the existing poles. (30 Nos. X 0.80 mtr. X 0.60 mtr. X 0.60 mtr. = 8.64 Cum).

Clearing jungle including uprooting of rank vegetation, grass, brush wood, trees and saplings of girth up to 30 cm measured at a height of 1 m above ground level and removal of rubbish up to a distance of 50 m outside the periphery of the area cleared. (30 Span X 60 Mtr. X 3 Mtr. = 5400 Sqr.Mtr.).

Supplying and erection of 50 mm X 50 mm X 6 mm angle iron (4.46 kg/mtr) as required. (Total Length = 8 Nos. X 2.5 Mtr. = 20.0 Mtr.) (Total weight = 20.0 mtr. X 4.46 kg/mtr. = 89.20 Kg).

Supplying and erection of 50 mm X 6 mm flat iron (2.36 kg/mtr) as required. (Total Length = 16 Nos. X 0.5 Mtr. = 8.0 Mtr.) (Total weight = 8.0 mtr. X 2.36 kg/mtr. = 18.88 Kg).

Supply and erection of 6 SWG G.I wire for Cradling and Earth Continuity. Total No. of Spans for Cradling = 04 Nos. Length of GI Wire Required for cradling = (04 Spans X 60 Mtr. X 2 Lengths + 04 Spans X 40 rings X 2 Mtr.) X 1.05 = 840 Meter Total No. of Spans for Earth Continuity = 06 Nos. Length of GI Wire for Earth Continuity = 06 Spans X 60 Mtr. X 1.05 = 378 Meter Total weight = (840 + 378) mtr. X 0.147 kg/mtr. = 179.046 Kg

Supplying and erection of 16 mm X 125 mm bolts and nuts with washers.

Total impact of GST for the purpose of CTC