COMPREHENSIVE MAINTENANCE OF TRANSFORMER VCB VOLTAGE STABILIZER AND CONNECTED ITEM AT AGE(I) R AND D MANALI

Amount

Disconnecting cable and Earthing connections of Servo voltage stabilizer of capacity 400 KVA , 3 phase to carry out overhauling of stabilizer comprising of the following:- (i) Draining out oil from chamber. (ii)Opening top cover , disconnecting winding connection from bushings and taking out carefully core assembly complete with winding. (iii) Checking compactness of core & tightening the same where required. (iv) Chemical washing of winding to remove dirt,dust & carbon particles (v) Cleaning of oil tank to remove oil sludge followed by painting of inner surface of tank with zinc chromate base paint (vi)Refixing of core & winding assembly and making connection with HT/LT bushing. (vii) Replacement of worn out gaskets & nut/bolts. (viii) Refilling of oil duly filtered/dehydrated/fresh oil. Removing of old damaged unserviceable Burnt dimmer coil and replacement new dimmer coil of 400KVA rating complete all as specified and as directed by Engineer-in-Charge. Material and labour for in replacement of carbon brush of all dimmer coils 400KVA stabilizer will be measured and paid sepretly complete all as specified and as directed by Engineer-in-Charge.

Disconnecting cable and Earthing connections of Servo voltage stabilizer of capacity 250 KVA , 3 phase to carry out overhauling of stabilizer comprising of the following:- (i) Draining out oil from chamber. (ii)Opening top cover, disconnecting winding connection from bushings and taking out carefully core assembly complete with winding. (iii) Checking compactness of core & tightening the same where required. (iv)Chemical washing of winding to remove dirt,dust & carbon particles. (v) Cleaning of oil tank to remove oil sludge followed by painting of inner surface of tank with zinc chromate base paint. (vi)Refixing of core & winding assembly and making connection with HT/LT bushing. (vii)Replacement of worn out gaskets & nut/bolts. (viii)Refilling of oil duly filtered/dehydrated/fresh oil. Removing of old damaged unserviceable Burnt dimmer coil and replacement new dimmer coil of 250 KVA rating complete all as specified and as directed by Engineer-in-Charge. Material and labour for in replacement of carbon brush of all dimmer coils 250 KVA stabilizer will be measured and paid sepretly complete all as specified and as directed by Engineer-in-Charge.

Disconnecting cable and Earthing connections of Servo voltage stabilizer of capacity 100 KVA , 3 phase to carry out overhauling of stabilizer comprising of the following:- (i) Draining out oil from chamber. (ii)Opening top cover , disconnecting winding connection from bushings and taking out carefully core assembly complete with winding. (iii) Checking compactness of core & tightening the same where required. (iv)Chemical washing of winding to remove dirt,dust & carbon particles (v)Cleaning of oil tank to remove oil sludge followed by painting of inner surface of tank with zinc chromate base paint (vi)Refixing of core & winding assembly and making connection with HT/LT bushing. (vii)Replacement of worn out gaskets & nut/bolts. (viii)Refilling of oil duly filtered/dehydrated/fresh oil. Removing of old damaged unserviceable Burnt dimmer coil and replacement new dimmer coil of 100KVA rating complete all as specified and as directed by Engineer-in-Charge. Material and labour for in replacement of carbon brush of all dimmer coils 100 KVA stabilizer will be measured and paid sepretly complete all as specified and as directed by Engineer-in-Charge.

Disconnecting cable and Earthing connections of Servo voltage stabilizer of capacity 30 KVA , 3 phase to carry out overhauling of stabilizer comprising of the following:- (i) Draining out oil from chamber. (ii) Opening top cover, disconnecting winding connection from bushings and taking out carefully core assembly complete with winding. (iii) Checking compactness of core & tightening the same where required. (iv) Chemical washing of winding to remove dirt,dust & carbon particles (v) Cleaning of oil tank to remove oil sludge followed by painting of inner surface of tank with zinc chromate base paint. (vi) Refixing of core & winding assembly and making connection with HT/LT bushing. (vii) Replacement of worn out gaskets & nut/bolts. (viii) Refilling of oil duly filtered/dehydrated/fresh oil. Removing of old damaged unserviceable Burnt dimmer coil and replacement new dimmer coil of 30KVA rating complete all as specified and as directed by Engineer-in-Charge. Material and labour for in replacement of carbon brush of all dimmer coils 30KVA stabilizer will be measured and paid sepretly complete all as specified and as directed by Engineer-in-Charge.

Removing of old damaged unserviceable Burnt dimmer coil and replacement repaired dimmer coil of 400 kVA rating complete all as specified and as directed by Engineer-in-Charge.

supply and fix new dimmer coil of 30 kva rating voltage stabilizer complete all as specified and directed by EIC.

M&L for in replacement of carbon brush of all dimmer coils 400KVA /250 kva stabilizer complete all as specified and as directed by Engineer-in-Charge.

M&L for in replacement of finger set 400/250 kva stabilizer complete all as specified and as directed by Engineer-in-Charge.

M&L for in replacement of carbon brush of all dimmer coils 30 kva stabilizer complete all as specified and as directed by Engineer-in-Charge.

M&L for in replacement of finger set 30 kva stabilizer complete all as specified and as directed by Engineer-in-Charge.

Removing of old damaged unserviceable Burnt transformer and repair the transformer winding incl all material of 400 kVA rating complete all as specified and as directed by Engineer-in-Charge.

Removing of old damaged unserviceable Burnt transformer and repair the transformer winding incl all material of 250 kVA rating complete all as specified and as directed by Engineer-in-Charge.

Removing of old damaged unserviceable Burnt transformer and repair the transformer winding incl all material of 30 kVA rating complete all as specified and as directed by Engineer-in-Charge.

M & L for Earthing complete with galvanized earth plate electrode 60 cm x 60cm x 6mm thick buried directly in ground to the depth of not less than 2.25 mtr below ground level with top edge of earth plate or a depth not less than 1.50 m below ground level connected to GI strip 32 x 6mm as earth lead by means of galvanized bolts, nuts check nuts and washers and necessary excavation and earth work PCC 1:2:4 type B-1 using 20mm graded brick aggregate for earth pit RCC cover , charcoal & common salt filled in alternate layers funnel with 20mm bore light grade watering pipe, 40mm dia GI pipe light grade for protection of GI strip, wire mesh and connected to earth point including testing on all as specified and shown in electric plate No 3 of SSR part I. complete all as specified and as directed by Engineer-in-Charge.

Strip opening of transformer of capacity 250/ 400 KVA, 11 KV /433 volts indoor /outdoor type of any make after unscrewing nuts & bolts, screws and connected accessories such as breather, conservator tank, temp gauge etc. for replacement of defective parts such as replacement of leaking gaskets, replacement of worn out/burnt out studs, checking and cleaning of contacts of tap changer and re-assembling the transformer after replacing the defective parts/repair complete all as specified and as directed by Engineer-in-Charge. Notes : (i) Payment of defective parts to be replaced shall be measured and paid for separately under respective item of this schedule. (ii) The cost for replacement of packing material such as top gasket, shall deem to be included in the unit rate quoted by the contractor against this item. (iii) The repair/strip opening of transformers shall be carried out at site of its installation without taking down/removal of transformer from the site of installation.

Supply only LT porcelain bushing and heat resistance gasket with brass/copper studs washer and rubber bush etc for Transformer of Cap up to 250 KVA/400 KVA, complete all as specified and as directed by Engineer-in-Charge.

Supply only HT 11 KV porcelain bushing with brass/copper studs and gaskets and rubber bush etc for Transformer of Cap upto 400 KVA/250 KVA, complete all as specified and as directed by Engineer-in-Charge.

Supply and filling up of fresh transformer oil as in topping up/levelling up after dehydration having dielectric strength not less than 60 KV at 2.5 mm gap conforming to IS -335/1993 complete all as specified and as directed by Engineer-in-Charge.

Material & labour for filteration of transformer oil as in topping up/levelling up after dehydration having dielectric strength not less than 60 KV at 2.5 mm gap conforming to IS -335/1993 complete all as specified and as directed by Engineer-in-Charge.

Overhauling/ servicing of HT VCB 400 to 630 Amps 11 KV of any make by carrying out following job:- (i)Taking out VCB trolly from the panel board. (ii)Removal of dirt,dust & carbon particles by air blower (iii)Cleaning of all moving & fixed contacts of VCB with dry cloth & CRC solution and greasing of moving contacts & gears. (iv)Checking and setting of VCB ON/OFF operation mechanism through TNC & push button. (v)Checking tightness of all control wires. (vi)Checking leakage in vacuum interrupter by Hi-Pot test (vii)Assembly of trolly and testing complete. Opening of VCB/Ring main unit) 11 KV of Capacity up to630 Amps for servicing, cleaning, tightening of loose mechanical mechanism, greasing,inspection of Busbar,CTs/PTs internal wiring of control panel ,indicators,measuring of IR value ,callibration of relays matching with 66 KV Grid replacement of unserviceable spare parts testing of tripping system and removing all type of dust and settled dirt by means of required T&P all as specified and directed by Engr-in-charge (spares shall be measured & paid separately) and testing complete all as specified and as directed by Engineer-in-Charge.

S&F Lightning arresters expulsion typecomplete with all fittings, transmission class, discharge capacity 11000 amp,complete all as specified and as directed by Engineer-in-Charge.

Supply and fix power bank for VCB 24 Volt including battery charger incl battery 12v 8 AH battery 04 nos complete all as specified and directed by EIC.

Supply and fix in replacement of LT XLPE insulated, armoured heavy duty electric cable with aluminium conductor, 1100 volts grade, cross-sectional area 50 sq. mm x3.5 Core, complete all as specified and as directed by Engineer-in-Charge.

M/S SUKHMANI ENGINEERS (BID ID -3171801)

M/S RUDHRAKSH TRADING CO (BID ID -3171917)