SPECIAL REPAIR/REPLACEMENT OF BER TRANSFORMER AND CONNECTED WORKS AT AF STN BKT

Disconnecting / taking down electrically indoor/outdoor stepup/stepdown transformer of capacity upto 200 KVA from HT/LT terminals and lowering down/getting out from 2/4 pole structure/plinth or inside sub station and deposited to MES store yard complete all as specified and directed . Note:- (a) The rates quoted is deemed to be included for hydra, men power and other items required for disconnecting / transport of transformer.

Supply and installation, commissioning and testing Transformer of capacity 200 KVA, 11/0.433 KV, 3 phase, 50 HZ, ONAN cooled oil immersed copper wound, outdoor type, step down Transformer complete with first filling of IS335 ISI marked, filtered and dehydrated transformer oil and other standard fittings/ accessories and 7 position with OFF LOAD tap changer tapping range up to +5% to 10% in step of 2.5% BEE compliance level III. The transformer shall be DYN-11 vector group and confirming to latest IS 1180 all as specified and directed. The transformer shall have following accessories:- (a) Oil conservator with filling hole and drain cock.. (b ) Oil level Gauge. (c) Oil seal type transparent breather with silica gel. (d) Two numbers earthing terminals with lugs. (e) Oil drain valve /filter valve. (f) Radiators with valves. (g) Lifting lugs with fastening holes. (h) Thermometer dial type 0-120 degree C. (k) Rating & specification plate.. (l) 04 Nos cast steel bi-directional detachable rollers. (m) Explosion vent with diaphragm & sight glass. (n) Transformer must have its neutral brought out for earthing on LV side. (o) Transformer must be earthed by two independent earthing with GI strip for body and other two independent earths for neutral. Neutral earthing of transformer should be done by using GI earth plate and GI earth strip. (o)Transformer shall be installed as described in IS 10028( Part-II) and in confirming with IE rule. (q) Cable termination box with disconnecting facility for 11 KV XLPE cable at 11 KV side and LT side.

Supply and installation, commissioning and testing of Transformer, capacity 100 KVA, 11/0.433 KV, 3 phase, 50 HZ, ONAN cooled oil immersed copper wound, outdoor type, step down Transformer complete with first filling of IS335 ISI marked, filtered and dehydrated transformer oil and other standered fittings/ accessories and 7 position with OFF LOAD tap changer tapping range up to +5% to 10% in step of 2.5% BEE compliance level III. The transformer shall be DYN-11 vector group and confirming to latest IS 1180 all as specified and directed. The transformer shall have following accessories:- (a) Oil conservator with filling hole and drain cock.. (b ) Oil level Gauge. (c) Oil seal type transparent breather with silica gel. (d) Two numberes earthing terminals with lugs. (e) Oil drain valve /filter valve. (f) Radiators with valves. (g) Lifting lugs with fastening holes. (h) Thermometer dial type 0-120 degree C. (k) Rating & specification plate.. (l) 04 Nos cast steel bi-directional detachable rollers. (m) Explosion vent with diaphragm & sight glass. (n) Transformer must have its neutral brought out for earthing on LV side. (o) Transformer must be earthed by two independent earthing with GI strip for body and other two independent earths for neutral. Neutral earthing of transformer should be done by using GI earth plate and GI earth strip. (o)Transformer shall be installed as described in IS 10028( Part-II) and in confirming with IE rule. (q) Cable termination box with disconnecting facility for 11 KV XLPE cable at 11 KV side and LT side.

Supply and laying in replacement XLPE insulated, screened, PVC bedded, galvanised steel strip or wire armoured, electric power cables (heavy duty) with aluminium conductor, 11000 volts Earthed, grade cross sectional area 95 sq. mm, 3 core complete all as specified and directed.

Excavation in trenches not exc. 1.5 m wide and not exc 1.5 m deep in soft/loose soil) for laying of cables or GI pipe and getting out including levelling of bottom surface to required level complete all as specified and directed

Returning filling in, including spreading, levelling, watering and well ramming soil in layers not exceeding 25 cm thick complete all as specified and directed.

Removing excavated material (ie soil) from site to a distance n. exc 50 m away and depositing where directed at a level n. exc. 1.5 m above the starting point complete

Supply and laying Sand coarse dry as in cushioning of under ground electric cable in trenches, laid to a uniform thickness of 23 cm (15 cm under the cable & 8 cm over the cable) and gently punned down to 18 cm thickness all complete as specified and as directed.

Supply and laying un-reinforced precast concrete cable cover, class HVP, type 1 with peak, size 300mm x 180mm x 40mm for cable protection of 11 KV cables complete as specified and directed.

Supply, laying, testing and commissioning in replacement Cable jointing kit for 11 KV (Earthed) grade cable for outdoor termination heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured aluminium conductor cable of size 50 sqmm to 95 sqmm complete all as specified and directed.