Replacement of Rusted and damaged MS chanels and associated rectification of 25 KVA transformer substation DP structure at Old USOF BTS site at Rangiagada and Badabali under Cuttack BA.

Amount

Dismantling of following structual items after taking power shutdown from supply company, Taking proper precautional measure & using required tools & plant by ensuring not to damage the dismantled Transformer, AB switches, DO fuses etc for further installation complete as required.

a) 25KVA Aluminium wound transformer with accessories

Dismantling of all existing old/damaged MS chanels, MS angle , MS Flat all structural items other than PSC pole by removing all MS bolts & fixing hard wares , using cutting machine/gas cutter for non wherever required , Keeping aside the recovered items for further disposal as required.

Supplying and fixing of following sizes Hot dipped Galvanised iron channel / angle /flat /V-cross arms with nuts , bolts and washers, etc. on DP structure / PSC pole Including cutting, welding, drilling holes, fabricating etc. as required. (Note:- The rate has been derived after deducting the scrap value of old MS channel/angles etc )

a) 100mm x 50mm x 6mm channel

b) 75mm x 40mm x 4.8mm channel

c) 50mm x 50mm x 6mm angle

d) 50mm x 6mm flat

Installation of transformer on DP structure , Making necessary electrical connection, checking testing complete as required.

Replacement of damaged and unserviceable AB switch by new one of 11 KV, off load, single break, triple pole, horizontal type, gang operated air break switch having 2 nos. 11 KV post type insulator per phase complete with galvanized channel iron base, arcing horns, 25 mm dia. 6mtr. long GI pipe, tinned copper wire braided flexible earthing wire & operating handle with locking arrangement etc. complete as required.

Replacement of damaged and unserviceable DO/HG fuse units by new one of 3 phase, 11 KV outdoor type Horn Gap Fuse unit having 2 nos. 11 KV post type insulator per phase complete with channel, cu-wire etc. as required. (one set comprising 3 units).

Replacement of faulty Lightening arrestors by new ones of nonlinear resistor type lightning arrestor suitable for 3 wire, 11 KV overhead lines with rated voltage 9 KV (rms) with a nominal discharge current rating of 5 KA and complete with galvanized clamping arrangement, G.I. bolts, nuts, washers etc. as required, comprising of 3nos per set.

Supply, installation and testing of 11 KV, 70 KN disc insulator (B & S type) with galvanised insulator hard ware fittings, ball and socket type and complete with all hard wares i.e. galvanised strain clamps, bolts, nuts, washers etc. complete as required.

Supply, installation and testing of 11 KV, porcelain pin insulator complete with large steel head G.I. pin, nuts, washers etc. as required.

Rewiring of the DP structure of Transformer Sub Station with 55sqmm AAA /50sqmm insulated Al.conductor stranded cable with al. Lugs/sockets, binding with post insulators etc. complete as required.

Earthing with G.I. earth plate 600 mm x 600 mm x 6 mm thick including accessories, and providing RCC ring of 300 mm dia and 450 mm depth enclosure with RCC cover plate having lifting arrangement and watering pipe of 2.7 metre long etc. with charcoal/coke and salt as required.

Supply and fixing 25 mm x 5 mm G.I. strip in 40 mm dia G.I. pipe from earth electrode including connection with G.I. nut, bolt, spring, washer excavation and re-filling etc. as required.

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

Supply and fixing of earth bus of 50 mm x 5 mm GI strip on surface above suitable size insulators, drilling holes for connections etc. complete as required.

Supply and fixing 6 SWG dia G.I. wire on surface or in recess for loop earthing as required.

Supply and fixing of 40 mm dia PVC pipe along with DP structure for insulating the earth strips of lightning arrestor etc. complete as required.

Supply & fixing danger plates made of mild steel at least 2mm thick & vitreous enameled white on both sides & with inscriptions in signal red colour on front side as reqd.

a) High Voltage size 250mm x 200mm

b) Medium Voltage size 200mm x 150mm

Liaison with different units of the supply authority i.e. Field units, MRT units, Division office etc. for obtaining shut down of 11KV line, breaking of meter seal if required to carry out the major repairing and maintenance works of the Transformer substation/replacement of channels/angles/LA/AB Swich/DO Fuse etc re-energisation, testing and re-commissioning etc. as required. Note : Statutory charges pertaining to S/stn work shall be paid by BSNL or will be reimbursed on production of original receipts.