Repair Maint and Servicing of Voltage Stabelizer Isolation Transformer Battery Bank and allied works at 6 Wing AF Kanchrapara LOS Dum Dum Jaffarpore and Barasat area under GE AF Barrackpore

Amount

Repair / Maint and overhauling of Servo Voltage stabilizer of capacity 30 KVA from existing position after disconecting the LT conections, open the outer cover, taking out coil, overhauling the complete unit by cleaning with suitable cleaning materials and replacement of minor spares such as fuse, diode, carbon brushs, holder, internal electrical wiring and electronic accessories and insulated properly by varnishing, greasing, CRC spraying complete all as specified and directed by Engineer-in-Charge. Note: Spare parts to be measured and paid separately under respective items here-in-after.

Supply and fix servo controller motor for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F Cummutatior plug of existing size for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F Brush Arm of existing size for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F Slip ring of existing size for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F PCV Card for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F Relay for 30 KVA Servo Voltage Stabilizer, complete all as specified and directed.

S&F Power contactor of 80 Amps, 3 Pole with 2 NO & 2 NC auxilary contacts of coil rating 415 Volt, 50 Hz, Including taking out old unserviceable one, complete all as directed by engr-in-charge. (Make : L&T/SCHNEIDER/SIEMENS/C&S ELECTRIC LTD

M&L for open the top cover of Isolation transformer of capacity 50 KVA to 75 KVA, after disconnecting cable connection, drain out of transformer oil and preserve it in container, replacement of all gasket for prevention of leaking, replacement of broken LT bushes complete as per existing size all as directed, refixing all connection and testing on load.(Note : Cost of LT bushes to be paid separately).

Supply only LT Bushing complete as per existing model.

M&L of new transformer oil for topping up all as directed. Make : Power oil.

M&L for dehydrartion of transformer oil all as required and directed.

Supply and fixing Rubber mat of 1 mtr x 2 mtr x 10 mm.

Supply & fixing indicator lamp LED type, 220 volt AC (RED/YELLOW/BLUE as per site) for each Phase, including taking down old unserviceable one, complete all as specefied and as directed. (Make: L&T/BCH/SIEMENS)

M&L for Earthing complete with GI earth plate electrode of size 600x600x6 mm thick buried directly in ground with earth pit not less than 2.25 meter deep below ground level with top edge of plate not less than 1.5 meter below normal ground level connected to GI earth strip of size 32 x 6 mm earth lead by means of nuts, bolts, check nuts, washers of galvanised iron as steel, protected by galvanized iron pipe 40mm bore (Medium grade) all as directed including cement concrete (1:3:6) type C-1 earth pit with precast RCC (1:1.5:3) type A-1 cover slab of size 42 x 42 x10cm thick reinforced with 8mm dia TMT bars @ 15 cm c/c both ways with 10mm dia mild steel round bar of 30 cm long, bent to shape as lifting handle, funnel, wire mesh, 20 mm bore galvanized iron pipe (medium grade) for watering, charcoal or coke and salt in alternate layers with necessary earth work in soft/loose soil complete all as shown in electrical plate No 3 of SSR Part I including testing on completion all complete as specified and directed after taking down old earthing.( GI strip upto 7.5m including testing consider in this item).

Supply and Fix Vacuum Interrupter with TC suitable for 6.6 KV VCB Panel (Make : Kirloskar) as per existing, complete all as specified and directed.

BOSE ENTERPRISE INDEX NO.E 106 2010 BKP

Das and Brothers

Oenix and associates

CHANDRA CONSTRUCTION AND CO

ZENITH CONSTRUCTION

SITARAM CONSTRUCTION