REPAIR/MAINT TO TRANSFORMERS, VCB, HT SWITCH BREAKERS AND ALLIED ITEMS AT AFMC, AIPT. ASI, OLD NDA AND OTHER UNITS UNDER GE (CENTRAL) PUNE

Amount

M&L for dehydration of transformer oil with mobile stream line transformer oil filtration plant at site with all accessories connected to transformer and carrying out filtration of oil to desired dielectric strength i.e. not less than 50 KV at 2.5 mm gap in existing position of transformer of any capacity complete at various sub stations located in scatered area at AFMC and other area under AOR of GE(C) Pune. NOTE-(i) Test certificates shall be submitted for before and after filtration for dielectric strength on the proper format. (ii) Transformer oil used for TOP UP will be measured and paid separately under relavent Item.

Supply & filling up of transformer oil conforming to IS -335 of 1993 as in topping up / replacement up to desired level of transformer oil capacity and Oil circuit brekar complete all as specified and as directed. [Note: Dielectric strength of oil should not be less than 50 KV/cm complete all as specified and directed.] (Make : GULF/POWER OIL/ SERVO or equivalent as approved by GE)

Disconnecting all in coming and outgoing cables, removing the transformer from the platform / two pole structure / floor and loading it in the vehicle carefully using crane and transporting it to the contractor's workshop, carry out the required repairs and transport the transformer back to the site , reinstall it, reconnect all the incoming and out going cables by proper crimping using lugs of suitable size taping the bushes / bus bars, using insulation tape and testing complete for 11 kV/22KV of following capacity all as directed . Note:- Gasket set, LT/HT side ceramic bushing, spindle for HT/LT side , rewinding,dehydration of oil shall be measured and paid separately in respective items.

100 to 200 KVA for 11 kV

250 to 750 KVA for 11 kV

100 to 250 KVA for 22 kV

315 to 500 KVA for 22 kV

Draining out all the transformer oil ,dismantling and inspection of transformer core and winding including taking out burnt out winding/insulation of LV / HV strips/coils , Reassembling of core and winding, drying out in vacuum chamber till specified IR values are obtained and providing new insulation materials, gasket, nuts , bolts, checking of leakages and rectifying the same by welding etc and replacement of silica gel for transofomer 11 kV of capacity for the following:- Note: (i) All materials required such as winding, LV/HV bushes, Silica gel breather etc will be measured and paid for separately (ii) Cost of trnasormer oil for cleanaing by hosing down shall be deemed include in the rate Quoted .

100 to 200 KVA for 11kV

250 to 750 KVA for 11kV

100 to 250 KVA for 22 kV

315 to 500 KVA for 22 kV

Supply and fixing of 11/22 KV HV coils,using new copper wire/strip of proper size including insulating materials (double insulation)as per existing size of core of transformer complete incl heating , varnishing all as directed .

Supply and fixing of 11/22 KV LV coils,using new copper wire/strip of proper size injcluding insulating materials (double insulation)as per existing size of core of transformer complete incl heating , varnishing all as directed .

Note for Item No 5&6 (Windings) (i) HV and LV windings shall be wound from Super Enamel covered /Double Paper covered ,copper conductor/ coil. (ii) Current density for HV and LV winding should not be more than 2.8 Ampere per sq mm for copper and 1.6 Ampere per sq mm for Aluminium Conductor. (iii) The core/coil assembly shall be securely held in position to avoid any movement under short circuit conditions. (iv) Joints in the winding shall be not allowed.

Material and labour to arrest the leakage of Transformer Oil from the body or bushing HT sides of Transformer capacity 11KV, 100 to 750 KVA including the followings:-

(a) Taking down the top cover and refixing after replacing duly pasted with gasket. (b) Taking out the transformer Oil from the transformer upto the level suitable to carry out the repair work. (c) Taking out the bushings and replacemnt by new bushing (set of three) duly complete with suitable gasket nuts, bolts and washers and all connected accessories complete. (d) Refilling of Transformer Oil after completion of repair work and ensure that the Leak has been arrested. (e) Reassembling compleate and testing and commissioing.

All as per item No 7 above but 22 kV of capacity from 100 KVA to 250 KVA

All as per item No 7 above but 22 kV of capacity from 315 KVA to 500 KVA

Material and labour to arrest the leakage of 11 kVTransformer Oil from the LT side busings of Transformer capacity 100 to 750 KVA including the followings:-

a) Taking down the top cover and refixing after repair duly pasted with gasket. b) Taking out the transformer Oil from the transformer upto the level suitable to carry out the repair work. (c) Taking out the bushings and replacemnt by new bushing (set of three) duly complete with suitable gasket nuts, bolts and washers and all connected accessories complete. d) Refilling of Transformer Oil after completion of repair work and ensure that the Leak has been arrested. e) Reassembling complete and testing and commissioing.

All as per item No 10 above but 22 kV of capacity from 100 KVA to 250 KVA.

All as per item No 10 above but 22 kV of capacity from 315 KVA to 500 KVA.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 100 to 750 KVA, 11/0.433 Volts transformers.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 100 to 250 KVA, 22/0.433 Volts transformers.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 315 to 500 KVA, 22/0.433 Volts transformers.

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 100 to 750 KVA, 11/0.433 Volts transformers .

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 100 to 250 KVA, 22/0.433 Volts transformers.

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 315 to 500 KVA, 22/0.433 Volts transformers.

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 315 to 500 KVA, 11/0.433 Volts transformers.

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 100 to 250 KVA, 22/0.433 Volts transformers .

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 315 to 500 KVA , 22/0.433 Volts transformers.

Supply only brass spindle on HT side as per existing size, shape and specification for capacity 100 to 750 KVA, 11/0.433 Volts transformers.

Supply only brass spindle on HT side as per existing size, shape and specification for capacity 100 to 250 KVA, 22/0.433 Volts transformers.

Supply only brass spindle on HT side as per existing size, shape and specification for capacity 315 to 500 KVA , 22/0.433 Volts transformers.

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 100 to 500 KVA , 11/0.433 Volts transformers.

Supply only breather assembly as per existing size, shape and specification complete for capacity 100 to 750 KVA, 22/0.433 Volts transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 100 to 750 KVA , 11/0.433 Volts transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 100 to 250 KVA, 22/0.433 Volts transformers.

Supply only Tap Changer as per existing size, shape and specification complete for capacity 315 to 500 KVA, 22/0.433 Volts transformers.

Painting of transformer after cleaning the body surface of transformer by rubbing with emery Paper to remove oil stains, dust etc and applying one coat of snthetic enamel paint by spray paint incl writing SM No/MES No , capacity of transformer of 100 KVA to 750 KVA capacity all as directed by Engr-in-Charge.

Shifting Transformer 200/400 KVA from one place to another after disconnection of LT & HT Side Connections, Installation, Commissioning and connecting LT & HT Side Connections, complete all as specified and as directed.

Replacement of existing unserviceable silica jel with new crystal clear silica jel for the breather of transformer all as shown and directed by Engineer Incharge.

Overhauling and servicing through agency authorised by OEM of HT VCB, 22 KV, 400/630 Amps of Make :AREVA/Schnieder/ MEGAWIN SWITCH GEAR installed at various locations under the sub division AGE E/M (Central) after taking shut down from department and opening both incoming and outgoing connections, dismantling complete Circuit Breaker after detaching including cleaning of all VCB contacts with CT's and replacement of minor parts such as Gaskets, washers, panel heater, indicator bulbs and carry out any other repairs required at site to make the VCB fully functional, complete all as specified and directed by Engineer Incharge.

Caliberation of relays of HT VCB by secondary and primary injection, replacement of defective operating handles, checking of under voltage, over current relays and replacement of UNSV parts of master relays complete all as specified and directed by Engineer Incharge.

S&F Microprocessor controlled numeric relay, three phase overcurrent and earth fault auxillary voltage of 18-52 V DC, current setting from 0.1 to 25 IN with LED display for trip, alarm warning & auxillary output and back lit, LCD display of parameter with programmable key board settings type CGI14N/C of Make : Crompton Greaves or equivalent all as specified and directed by Engineer Incharge.

Excavation in trenches not exc 1.5 metre wide and not exc 1.5 metre depth for laying of UG cable/pole foundation etc getting out including forming bottom surface to required level and gradient in soft/loose soil complete all as specified and as directed by Engineer Incharge..

Returning and filling in excavated soil including spreading leveling, watering, well ramming in layers not exc 25 Cm thick complete all as specified and directed by Engineer Incharge.

Removing of excavated materials not exceeding 50 metre and depositing where directed by Engr in Charge at a level not exceeding 1.5 metre above the starting point complete all as specified and directed by Engineer Incharge.

M & L for Reinforced concrete pipes of dia 150 mm 2 nos half round (each of 1 RM long for bottom and top ) and before laying excavated area shall be levelled all including taking down/ Removing old unsv pipe as specified and directed by Engineer Incharge.

Supply and lay test and commissioning HT XLPE cable , insulated, screended, PVC bedded, galvanised steel strip or wire armoured, electic power cable (heavy duty) with staranded aluminium conductor, conforming to IS, 22 KV "E" grade, cross sectional area laid in pipe/ducts/ trenches/ under floor/ under road all as specified of following sizes:- Note :- Excavation, earth work, cable ptotection pipe measured and paid sepretaly.

(a) 3 core x 95 Sqmm

(b) 3 core x 120 Sqmm

Supply and laying 2.5mm thick synthetic rubber mat Confirming to IS:15652 2006 and relavant IS along with suitable adhesive/chemibound, PU Resin, water proofing compound and sealing material suitable for working Voltage up to 22KV with trolley movement complete all as specified and as directed by Engineer-in-Charge.

Dismantling existing unserviceable two Pole Structure of any description and any size including taking down the GOD, Cross-Arms, Insulators, LA etc keeping in safe custody for reuse or credit to work and demolition of Cement Concrete (as/if required) and made good disturbed ground complete all as specified and as directed.Note : Unsv Poles will be dismantled at Ground Level and disturbed ground will made good as directed by Engineer Incharge for which Earthwork, demolition of Cement Concrete, etc. will not be measured and paid separately.

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CHAITANYA WINDWELL

M/S SVOJAS ELECTROMECH ENTERPRISES