Providing and fixing of 01 No. 11KV, 630A on-load isolator at Kathara Basti, Transformer Site under Kathara Colliery.

Providing of 11KV, 630A onload isolator

Supplying and laying 25 mm X 5 mm G.l strip at 0,50 metre below ground as strip earth electrode, Including connection/terminating with G.l. nut, bolt, spring, washer etc. as required. (Jointing shall be done by overlapping and with 2 sets of G.l. nut bolt & spring washer spaced at 50mm)

Earthing with copper earth plate 600 mm X 600 mm X 3 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 of copper made Lightning conductor/Rod having single prong at top

Erection of RCC/ PCC pole of following length in brick ballast and ramming the foundation, finishing with 150mm thick cement concrete (1:3:6) layer on top with including excavation and refilling etc as required. Above 8.0 metre and upto 11.0 metre

Supplying of two lengths of channel iron 75 mm X 40 mm X 6 mm (7.14 kg per metre) double pole cross arm for three wire 11KV over head line conductors complete with through bolts and nuts for clamping to the poles, 50 mm X 6 mm M.S. flats welded on one side to the channel iron and with bolts and nuts on the other side for tying the cross arms together, including drilling holes for insulator pins/ fittings, bolts, nuts and washers etc (as per drawing) and painting with primer and finish paint as required.

Supplying and erection of a set of cross bracing FRLSame work for 11 KV over head line double pole structure having four members fabricated out of 50 mm X 50 mm X 6 mm angle iron to form a rectangle of minimum size 1400 mm width X 2500 mm height, complete with 50 mm X 6mm M.S. flat iron clamps, bolts and nuts including drilling holes for insulator pins, bolts and nuts etc (as per drawing) and painting with primer and finish paint as required.

Erection of double pole 3 wire cross arm for 11KV/ |22KV/ 33 KV over head lines as required.

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

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