84702REPAIR /MAINTANANCE OF TRANSFORMER OTHER CONNECTING ITEMS VCB/OCBs AND CONNECTED ITEMS AND REPAIR TO HT DISTRIBUTION SYSTEM AND CONECTED ITEMS IN THE AREA OF AGE E/M (NORTH) UNDER GE (NORTH) 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 40 KV at 2.5 mm gap in existing position of transformer of any capacity and transformer including topping up transformer oil complete upto Level at various sub stations located in scatered area all as directed 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 complete all as specified and as directed. [Note: Dielectric strength of oil should not be less than 42 KV/cm complete all as specified and directed.

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 , install it, reconnect all the incoming and out going cables by properly crimping using lugs of suitable size taping the bushes / bus bars, using insulation tape and testing complete of capacity 400 KVA to 500 KVA 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.

All as per item No 03 here- in- above but of capacity 200 KVA to 315 KVA.

All as per item No 03 here- in- above but of capacity 100 KVA to 160 KVA.

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 of capacity 400 KVA to 500KVA all as directed . 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 .

All as per item No 06 here- in- above but of capacity 200 KVA to 315 KVA.

All as per item No 06 here- in- above but of capacity 100 KVA to 160 KVA.

Supply and winding of 11/0.433 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. Note : (i) HV and LV windings shall be wound from Super Enamel covered /double Paper covered , aluminium /copper conductor/ coil 100 KVA .

Supply and winding of 11/0.433 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 : (i) HV and LV windings shall be wound from Super Enamel covered /double Paper covered , aluminium /copper conductor/ coil 100 KVA .

M & L for winding of 11 /0.433 KV LV coils,removing U/S insulating materials, double reinsulation with insulating papers using same copper strip and rewinding as per existing size of core of transformer complete incl heating , varnishing all as directed. Note : (i) HV and LV windings shall be wound from Super Enamel covered /double Paper covered , aluminium /copper conductor/ coil 100 KVA .

HV and LV windings shall be wound from Super Enamel covered / Double Paper covered copper conductor/coil winding for ratings above 100 KVA.

LV winding shall be such that neutral formation will be at top.

The winding construction of single HV coil wound over LV coil is preferable.

Inter layer insulation shall be Nomex /Epoxy dotted Kraft Paper.

Proper bonding of inter layer insulation with the conductor shall be ensured. Test for bonding strength shall be conducted.

Dimensions of winding coils are very critical. Dimensional tolerances for winding coils shall be with in limits as specified.

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.

The core/coil assembly shall be securely held in position to avoid any movement under short circuit conditions.

Joints in the winding shall be not allowed.

M&L for arrest the leakage of Transformer Oil from the HT side busings of Transformer capacity 315KVA to 500 KVA including the followings:-

Taking down the top cover and refixing after repair duly pasted with gasket.

Taking out the transformer Oil from the transformer upto the level suitable to carry out the repair work.

Taking out the bushings and replacement of the same duly coupled with suitable gasket nuts, bolts and washers

Refilling of Transformer Oil after completion of repair work and ensure that the Leak has been arrested.

Reassembling compleate and testing and commissioing

All as per item No 12 here- in- above but of capacity from 200 KVA to 250 KVA.

All as per item No 12 here- in- above but of capacity from 63 KVA to 160 KVA.

Material and labour for arrest the leakage of Transformer Oil from the LT side busings of Transformer capacity 315KVA to 500 KVA including the followings:-

Taking down the top cover and refixing after repair duly pasted with gasket.

Taking out the transformer Oil from the transformer upto the level suitable to carry out the repair work.

Taking out the Brass bushings and supply and replacement of the same duly coupled with suitable gasket nuts, bolts and washers.

Refilling of Transformer Oil after completion of repair work and ensure that the Leak has been arrested.

Reassembling compleate and testing and commissioing.

All as per item No 15 here- in- above but of capacity from 200 KVA to 250 KVA.

All as per item No 15 here- in- above but of capacity from 63 KVA to 160 KVA.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 350 to 500 KVA, 11/0.433 Volts transformers.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 200 to 300 KVA, 11/0.433 Volts transformers.

Supply only Ceramic Bush insulators on LT side as per existing size, shape and specification for capacity 50 to 150 KVA, 11/0.433 Volts transformers.

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 350 to 500 KVA, 11/0.433 Volts transformers.

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 200 to 300 KVA, 11/0.433 Volts transformers .

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 50 to 150 KVA , 11/0.433 Volts transformers.

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 500 KVA, 33/11 KV transformers .

Supply only brass spindle on LT side as per existing size, shape and specification for capacity 1600 KVA, 33/11 KV transformers .

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 315 to 500 KVA, 11/0.433 Volts transformers

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 200 to 250 KVA, 11/0.433 Volts transformers

Supply only cork sheet gasket (set of four) for ceramic bushing on LT side as per existing size, shape and specification complete for capacity 63 to 160 KVA, 11/0.433 Volts transformers

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 315 to 500 KVA, 11/0.433 Volts transformers

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 200 to 250 KVA, 11/0.433 Volts transformers

Supply only Ceramic Bush insulators on HT side as per existing size, shape and specification for capacity 63 to 160 KVA, 11/0.433 Volts transformers

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

Supply only brass spindle on HT side as per existing size, shape and specification for capacity 200 to 250 KVA, 11/0.433 Volts transformers

Supply only brass spindle on HT side as per existing size, shape and specification for capacity 63 to 160 KVA , 11/0.433 Volts transformers

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 315 to 500 KVA , 11/0.433 Volts transformers

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 200 to 250 KVA, 11/0.433 Volts transformers

Supply only top cover gasket set as per existing size, shape and specification complete for capacity 63 to 160 KVA, 11/0.433 Volts transformers

Supply only breather assembly as per existing size, shape and specification complete for capacity 315 to 500 KVA , 11/0.433 Volts transformers

Supply only breather assembly as per existing size, shape and specification complete for capacity 200 to 250 KVA, 11/0.433 Volts transformers

Supply only breather assembly as per existing size, shape and specification complete for capacity 63 to 160 KVA, 11/0.433 Volts transformers

Supply only Tap Changer as per existing size, shape and specification complete for capacity 315 to 500 KVA , 11 /0.433 Volts transformers

Supply only Tap Changer as per existing size, shape and specification complete for capacity 200 to 250 KVA, 11 /0.433 Volts transformers

Supply only Tap Changer as per existing size, shape and specification complete for capacity 63 to 160 KVA, 11 /0.433 Volts transformers

Overhauling servicing of tap changer and replacement of unserviceable parts as ordered with new and assembling with old serviceable parts for smmoth functioning and operation complete as all specified and as directed

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 400 KVA to 500 KVA capacity all as directed by Engr-in-Charge

All as per item No 45 here- in- above but of capacity 200 KVA to 315 KVA Transformers.

All as per item No 45 here- in- above but of capacity 100Kva to 160 KVA Transformers.

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

M/L for cement concrete in foundation, filling and mass concrete type B2 1:2:4 (20 mm graded aggregate) for LT Panel board foundation /fencing post fdn /yard Boundary and making good the road cutting areas.

S&F Chain link MS galvanised fencing, including line wires, 50 mm x 50 mm mesh size and any type of standards, rails, straining bolts, etc. including provission of binding wire complete all as specified and as directed by GE.

M&L for stone aggregate of size 35 to 40 mm spreading over sand layer in the sub station areas including proper levelling all as directed and shown at site all as directed by Engr-in-Charge..

M&L for stone aggregate of size 20 to 25 mm spreading over sand layer in the sub stations areas including proper levelling all as directed by Engr-in-Charge.

M&L for Angle Iron, fencing posts, cross arms, bracings, supports,, clamps and back plate fabricated from structural steel sections including nuts, bolts, washers, welding, bending cold or hot, drilling holes for bolts, in any shape or size as indicated or directed and inclusive of one primer coat, one under coat and one finishing coat of paint. Note: The PCC for fountation of Fencing Pole shall be measured and paid separately.

Supply and laying in repairs synthetic/silicon Insulating sleeves having stripping, increased flexibility, tear & High Temp resistant and dielectric strength of suitable thickness straight/Curved suitable for HT 11 KV ACSR Conductor/ Bus Bar Lines fixed in structures , free from any insertions leading to detoriation of insulating properties and confirming to IS-15652:2006. Note : The upper surface should have colour coding of Red /Yellow /Blue as Phase indication

Supply and Fix drop out fuse two post insulator per pole complete with FRP fuse barrel channel type of capacity 200 Amps complete all as specified.

M&L for Painting of HT poles including cross arms complete with synthetic enamel paint including filling cavities with filler one coat after cleaning all dust/rust including writing the pole No.and all as directed by Engr-in-Charge

M&L for applying two coats of White snowcem for Plinths of Transformers, Pole Copings, Earthing electrode Chambers, walls of sub-stations, by cleaning fungus, with wire brush.

Supply and fixing in replacement tubular aluminium alloy bus bar 12 mm thichness of 32 mm outer dia and 20 mm inner dia with colour code of Red, yellow & blue coupled with Al Clamps 120 mm Length 6 mm thickness mounted on polymer based 11 KV insulators suitable for HT 11 KV four pole structures in horizontal layers duly coupled with strip jumbers, Lightning arrestors etc complete all as directed at site by Engr-in-Charge. Note : The work to be carried out in existing structure. Hence continues shut down will not be available. According to the availabity of shut down timing the contractor shall manage the work in quoted rate only.

Supply and fixing in replacement solid aluminium strip of 40 mm x 10 mm with colour code suitable for HT 11 KV four pole structures in verticle layers fixed in polyglass/epoxy & cycloaliphatic insulators duly coupled with horizantal bus bars , Lightning arrestors, drop out fuse assembly, Gang operated device etc complete all as directed at site by Engr-in-Charge. Note : The work to be carried out in existing structure. Hence continues shut down will not be available. According to the availabity of shut down timing the contractor shall manage the work in quoted rate only.

Replacement of breather assembly complete with silica jel in transparent container with metallic top & bottom cup with pipe entry of 15/20 mm dia, including air oil bath tub.

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

M & L for retreatement of earthing by removing old earth pit and refilling Charcol & Salt cristals of 50 Kg Each including taking out old expired chemical/Charcol/Salt and refilling of soil, watering & well ramming and constrction of new earth Chamber with fixing of funnel complete with colour code such as green for body earthing/blue etc all as specified and directed by Engineer- in-charge.

S & F for Insulator Pin/ post type polymer based including one galvanishing MS spindle, nuts & washers for 11000 volt grade and fixing to the structure and binding of conductor including removal of unserviceable one from the HT 2 pole/ 4 pole/6 pole structure complete all as specified and directed.

S & F for Alkathine PVC pipe for bus/ jumper connection as insulating material at 4 pole/ 2 pole/6 pole structere in the area complete all as specified and directed.

S & F for HT Aluminium ferrules/ lugs of suitable size with chromium plated nut bolts for connection of GOD/DO/ cable end jumpers upto 185 Sq mm size including removal of unserviceable one complete all as specified and directed

Supply and fixing as in replacement Temperature Guage as per existing size, shape and specification complete for capacity 400 KVA , 11/0.433 Volts transformers

Supply and fixing as in replacement Temperature Guage Changer as per existing size, shape and specification complete for capacity 200 to 315 KVA, 11/0.433 Volts transformers

Supply and fixing as in replacement Temperature Guage as per existing size, shape and specification complete for capacity 100 to 160 KVA, 11/0.433 Volts transformers complete all as specified and directed.

Overhauling and servicing through agency authorised by OEM of HT VCB, 11 KV, 400/630 Amps of Make : GEC ALSTOM/SCHNEIDER /CROMPTON GREAVES/AREVA installed at various locations under the sub division AGE E/M North 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.

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.

Repairs and overhaulling of Air Circuit Breaker (ACB) 3/4 pole, 415 Volt, upto 800 Amp with thermal magnetic release by replacement of worn out parts and cleaning the complete ACB and testing the same after repair for smooth functioning etc complete all as specified and directed.

Overhauling and servicing through agency authorised by OEM of HT RMU 11 KV, 400/630 Amps of Make : Biecco Lawrie Schneider/ABB/GEC ALSTOM/ installed at various locations including cleaning of all OCB contacts with CT's and replacement of minor parts such as Gasket, washers, panel heater and indicator bulbs and any other repair required at site to make the RMU fully functional, complete all as specified and directed

Servicing and overhauling of PT attached with OCB as per standard practice including taking out of transformer oil and refilling the same after filteration and dehydration, replacement of defective bushing, barrel fuse and repairs to damaged coil of PT, topping up the PT with new transformer oil upto desired level, commissioning and testing etc, complete all as specified and directed. (Note :- The cost of filteration and dehydration of old transformer oil supply only for topping up of transformer oil and replacement of PT fuse will be measured and paid separately.)

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.

Over hauling of HT OCB 11 KV, 400/630 Amps, 250 MVA of Make : MEI/GEC ALSTOM/Crompton Greaves/ Southern switch Gear installed at various locations after taking shut down from department and opening both incoming and outgoing connections, dismantling complete Circuit Breaker after detaching oil tank and draining out oil in a separate container and cleaning of oil tank thoroughly and carrying out the following repair work :-

Taking out complete parts of OCB separately viz. like ARC control pot assembly, jack ring , contact main, TULIP contact finger assembly, terminal bushing, moving contact block, fixed contact block, pick off spring assembly, moving ARC, Contact ARC, assembly of main moving contact, speed control device assembly etc and checking the same for its serviceability/ suitability for refixing, cleaning of all parts thoroughly as per standard practice, reassembling complete parts of OCBs including replacement of existing unserviceable spare parts all as approved and directed.

Taking out complete parts of Truck & Hoist Assembly, after removing old grease checking the same for its suitability/ serviceability and reassembling complete truck and hoist assembly after replacement of defective parts all as approved and directed including greasing and oiling the complete mechanism as per standard practice.

Servicing of dependent/independent mechanism and spring charging mechanism including replacement of minor spares comprising of scope as under :- (a) Recommissioning including testing of HT OCB for overload setting and adjustment complete (b) Recommissioning of complete Truck and Hoist assembly all as directed

Checking/testing/servicing of tank assembly/barrier, solenoid machianism, trip unit assembly, BUS bar spout epoxy cast side entry cable base busing, arrangment with drawable type PT assembly of male female housing etc complete including repalcement of defective parts with new all as directed.

Over hauling of HT panel of each OCB including cleaning of bus bar chember, CT's and painting all exposed surfaces with one coat of insulation paint of same colour and replacement of control fuses, replacement of heater and bus bar insulators all as directed and painting Alphbet/Numbers with bold letters upto 5 cm height with black colour.

NOTES: (i) Cost of all the materials, repairs and works as specified above as well as all the other elements (except followings) to make the OCB's fully functional shall be deemed to be included in the quoted rates :- (a) Cost for filteration and dehydration transformer oil to achieve the desired dielectric value as catered for under item No. 3.00 here-in-before: (b) Cost for supply only additional transformer oil for topping-up as catered for under item No. 4.00 here-in-before:

KOYNA ENGINEERS PVT LTD

M/S - KRUPA ELECTRICALS

Urja Techniques India Pvt. Ltd.

PAMS ENTERPRISES

M/S. Niksun Electro-Infra Private Limited

Rama Electricals