Supply, installation, testing, commissioning, repair and Maintenance of HT Gang Operated Air Break Switches and overhead line maintenance works at Block-B Project.

Amount

Supply of complete set 11KV grade, 1250 Amp offload isolator (GOAB switch) for mounting on poles (1 set= 3 limbs including fix moving blades, contact, horozental and vertical GI pipesfor operation etc for each phase)

Installation, testing and commisssioning of 11 KV grade, 1250 Amp isolator(GOAB switch) on ploes in mine

Supply of MS/GI/Brass nuts, bolts and washer of different sizes as per requirment.

Replacement of isolators, overhauling, alignment of GO switches and contact gap adjustment etc including fixing of connectors (All material supplied by contractor)

Replacement of moving contact for isolator blade 11KV 800/1250 Amp (All material supplied by contractor)

Replacement of fix contact for isolator blade 11KV 800/1250 Amp (All material supplied by contractor)

Replacement of Aluminium isolator pad clamp 75 mm x 8 mm for 11 KV 800/1250 amp (All material supplied by the contactor)

Fabrication and erection of steel of different size for base channel, isolating handle etc, bracket, clamp (as per EIC)

Erection of channel/flat/Angle on pole including supply of nut bolt per pole

Supply of 33KV pin insulator with hardware

Replacement of damaged 11 KV grade pin insulator with pin (All material supplied by the contactor)

Supply of 11 KV grade disc insulator for 11 KV overhead lines with galvanised insulator fittings, ball and socket type and complete with galvanised strain etc as required.

Supply of Bimetallic connectors/terminals (friction welded) of 70 sq mm size (Copper to Aluminium)

Supply of Bimetallic connectors/terminals (friction welded) of 50 sq mm size (Aluminium to Copper)

Painting of electric pole of different size 11/13/16 meter including brackets, clamp, bracings and barbed wire etc. After removal of dust and rest with one coat of red oxide and two coat of aluminium paint. All the material should be supplied by contractor.

Painting with synthetic enamel paint of approved brand and manufacture to give an even shade (Base Yellow Colour): Two or more coat on new work 0.06967 Sq. Mtr. Per pole X 25 Pole= 1.75 Sq.Mtr. All the material should be supplied by contractor.

Lettering on pole with black japan paint of approved brand and manufacturer Total lettering on each pole= 17 Nos. Size of letter= 04 CM Total LCM height in each pole= 68 Length Centimeter For 25 Nos pole= 1700 LCM

Color code of HT & LT line by primer coat of one layer with red oxide and after that the two layer paint of required colour including all the labor and material charge after cleaning the rough surface 0.6383 Sq. Mtr. Per pole 0.6383 x 25 Nos. of Poles= 15.96 Sq.Mtr.

Supply and Erection of GI earth wire 7/16 SWG ( 0.177 Kg/Mtr. X 2000 Mtr. = 354 Kg)

Limit switch for interlocking of isolator.

Making and erection of steel enclosure as per site requirment with lock arrangement.

Wiring of limit switch, indicating lamps with ferrule, lugs and numbering inside isolator panel box.

Supply and laying of 4x2.5 Sq.mm armoured copper cable in trench.

Installation, testing and commissioning charges of limit switch with interlocking for the isolator.

Total impact of GST for the purpose of CTC