MAINT AND REPAIRS TO HT DISTRIBUTION TRANSFORMERS HT VCBS UNDER GE AF BIDAR

Amount

Disconnection and removing HT cable connections connected to the HT VCB and carried out complete Overhauling servicing of 11 KV, 3 phase 50 Hz VCB upto 630 Amps capacity (drawnout / fixed type) complete including finding out the defective parts such as fixed male & female contacts, under voltage relays, power pack unit, spring charge motor, operating mechanism, gear box, CT & PT units, VCBs Bottles, Triping/ closing coil, HT Fuses, 11 KV LBS fix & moving arm and charging unit complete including calibration of relay & VCB and reconnecting the cables testing and commsissioning of the following Makes as existing at site : MEGHAWIN/ AREVA/SIEMENS/ABB/Schenider Note : (1) Spring charge motor, Triping/ closing coil, HT Fuses & moving arm and cast resin bushes etc measured spearately under respective item of the BOQ item No 2 to 15. (2) Miscelleneous items required for satisfactory completion of job deemed to be inclusive in the unit rate quoted.

Supply only Tripping coil DC 24/110 volts suitable for existing breakers.

Supply only Closing coil DC 24/110 volts suitable for existing breakers.

Supply only Spring charge motor single phase for functional of HT VCB suitable for existing makes.

Supply only auxillary relay VAA model no.VAA33ZG8344BCH ALSTOM suitable for existing breakers. Make L&T or equvalent

Supply only single phase under voltage or over voltage relay 20/110 V or 82/264V suitable for existing breakers. Make L&T or equvalent

Supply only single phase over current or earth fault relay 20/110 V or 82/264V suitable for existing breakers. Make L&T or equvalent

Supply multi function digital panel meter having the parameters the HT voltage,current, frequency, power factor , KVA, KVAR etc suitable for operating voltage 24/110/230 volts complete all as specified and as directed. Make L&T/CADLE/Socomech

Supply only HT barrel fuse 2 Amps suitable for 11 KV potential transformer of existing makes.

Supply only HT barrel fuse 32 Amps Din type suitable for existing HT 11 KV breakers

Supply only HT barrel fuse 32 Amps BS type suitable for existing HT 11 KV breakers

Supply only plastic sleeve suitable for moving arm unit (male & female) type suitable for existing HT 11 KV breakers

Supply only female contact made out of copper with silver coating type suitable for existing HT 11 KV breakers

Supply only cast resin bush unit of suitable for existing HT 11 KV breakers along with copper studd duly coated with sliver plate for fixing of 11 KV bus bars along with suitable nut bolts and watchers.

Supply and fixing of Gear box of 11 KV HT VCB panel including taking out old U/S Gear box complete all as specified and as directed. Make Magawin or equivalent

Supply and fixing power pack unit of capacity 230/ 24 Volts 3 phase and making necessary connection to PTs complete including taking out old U/S power pack unit complete all as specified and as directed. Make Power pack

Supply and fix trip circuit supervision relay VAX30-34V model No.VAX31ZG8043FCH make- Alstom including taking out old U/S relay complete all as specified and as directed.

M&L for servicing of HT breakers mechanical parts including greasing of moving parts and checking of spring charging motor for its proper functioning and testing and resetting the same complete all as specified and as directed

Disconecting and removing the serviceable LT cable connections connected to the Isolation transformer( oil Cooled /Air Cooled) type care fully and transporting the Isolation transformers of the following capacities. to Local work shop for repairs such as rewinding of transformer , bushes etc.. and refixing the Isolation transformer in its original position after completion of repairs including connecting up of cables & testing and commisioning complete all as directed by Engineer in Charge Note1: Cost of rewinding ,bushes,transformer oil will be measured and paid separately under respective items Note2; Decening of oil and filling back in to the container of the transformer deemed to be inclusive in the unit rate

IsolationTransformer LT of capacity 50 KVA(Air cooled)

IsolationTransformer LT of capacity 125 KVA(oil cooled)

IsolationTransformer LT of capacity 250 KVA(oil cooled)

IsolationTransformer LT of capacity 400 KVA(oil cooled)

Disconnection and Removing the unserviceable/ burnt out Isolation Transformer Three Phase 440 V / 440 V copper winding of the following capacities and rewinding the same with fine enamelled bare copper conductor of same gauge size,turns, and weight and keeping the core and windings into the hot air oven till the moisture evoporates complete Note: Rates Quoted deemed to be inclusive of all Misc items such as Cotton tape, warnishing,impregnated paper etc.

IsolationTransformer LT of capacity 50 KVA(Oil cooled)

IsolationTransformer LT of capacity 125 KVA(oil cooled)

IsolationTransformer LT of capacity 250 KVA(oil cooled)

IsolationTransformer LT of capacity 400 KVA(oil cooled)

Disconecting and removing the serviceable HT/LT cable connections connected to the transformer carefully and tansporting the transformer to local work shop for repairs such as rewinding of transformer , bushes etc.. and refixing the transformer in its original position after completion of repairs including connecting up of cables testing and coimmisioning complete all as directed by Engineer in Charge of the following capacities. Note 1: Cost of rewinding ,bushes,transformer oil will be measeured and paid separately under respective items Note2; Decening of oil and filling back in to the transformer shell and gasket and Misc items are deemed to be inclusive in the unit rate.

Transformer 11/0.433 KV , 50/63 KVA

Transformer 11/0.433 KV , 100 KVA

Transformer 11/0.433 KV , 160 KVA,

Transformer 11/0.433 KV , 200 KVA

Transformer 11/0.433 KV , 250 KVA

Disconnection and Removing the unserviceable/ burnt out primary and secondary copper windings and rewinding the same with fine enamelled bare copper conductor of same gauge size,turns, and weight and keeping the same into the hot air oven till the moisture evoporates of the following capacitie Transformers complete. Note: Rates Quoted deemed to be inclusive of all Misc items such as Cotton tape, warnishing,impregnated paper etc.

Transformer 11/0.433 KV , 50/63 KVA

Transformer 11/0.433 KV , 100 KVA

Transformer 11/0.433 KV , 160 KVA,

Transformer 11/0.433 KV , 200 KVA

Transformer 11/0.433 KV , 250 KVA

Disconnection and Removing the unserviceable/ burnt out Primary 11 KV Bushing units complete and replace the same with same size and capacity of bushing with brass Studs along with suitable nut bolt and washers complete suitable for the following Transformers

Transformer 11/0.433 KV , 50/63 KVA

Transformer 11/0.433 KV , 100 KVA

Transformer 11/0.433 KV , 160 KVA

Transformer 11/0.433 KV , 200 KVA

Transformer 11/0.433 KV , 250 KVA

Transformer 11/0.433 KV , 315 KVA

Transformer 11/0.433 KV , 1000 KVA

Disconnection and Removing the unserviceable/ burnt out Secondary LT Bushing units complete and replace the same with same size and capacity of bushing with brass Studs along with suitable nut bolt and washers complete suitable for the following Transformers

Transformer 11/0.433 KV , 50/63 KVA

Transformer 11/0.433 KV , 100 KVA

Transformer 11/0.433 KV , 160 KVA,

Transformer 11/0.433 KV , 200 KVA

Transformer 11/0.433 KV , 250 KVA

Transformer 11/0.433 KV , 315 KVA

Transformer 11/0.433 KV , 1000 KVA

M & L for Silica Gel of Transformer including removing the unserviceable Silica gel all as directed at site.

M&L for spreading of graded stone aggregate 30 to 40mm grade required thickness all as specified and as directed

M & L for Mild steel plates, plain or chequered, 5mm thick cut to shape and size to match the existing HT / LT cable ducts including provision of holes to accomodate the handles and painting the same with two coats of synthetic enamel paint over one coat of red oxide primer all as specified and directed by Engineer in charge

Supply and fix mild steel work as in cross arms, bracings, supports, clamps and back plates fabricated from structural steel sections including bolts, nuts, washers inclusive of one coat primer and two coats of painting including dismantling the unserveable one complete all specified and directed.

Disconnecting & Removing the unserviceable GOD horizontal / vertical of capacity 400 A, 11 KV from the Two/four pole / six pole structure carefully and supply and fix gang operated air-break switch 400 A, 11 KV, triple pole, mounted on post insulator along with 25mm light grade GI tubing operating from operating mechanism from ground level complete all as specified and as directed. Note: Cost of Jumper connections along with fixing material deemed to inclusive in the unit rate.

All as per Item No.30 here-in-above but of capacity 200 Amps complete all as specified and as directed

Disconnecting and removing the unserviceable 11 KV Disc type insulator from HT poles and S&F Disc type insulator, porcelain, vitreous 145mm hight and 255mm dia ball and socket type, white, brown or green single disc assembly of 11000 Volts ISI Marked along with fixing material such as GI bolt, nut and washers etc. complete all as specified and as directed.

Disconnecting and removing the unserviceable 11 KV Pin insulator from HT poles and S & F Pin type, porcelain, vitreous, white, brown or green insulator including one galvanised mild steel spindle, two galvanised iron washers and one galvanised iron nut, 100mm height, 65mm dia for 11000 Volts ISI Marked along with fixing material such as GI bolt, nut and washers etc. complete all as specified and as directed.

Disconnecting and removing the unserviceable 11 KV Lightening arrester carefully from the 2/4/6 Pole structure and Supply & fix lightining arrester suitable for 11000 Volts of discharge capacity 65 Kilo Amp, 3 Phase including connecting of the same to the supply with necessary fixing materials such as nut bolt, washers etc. complete all as specified and as directed at site by the Engineer-in-Charge.

Disconnection and removing the unserviceable 11 KV Expulsion fuse single pole carefully from the 2/4/6 Pole structure and Supply & fixing Expulsion fuse single pole along with post insulators suitable for 11000 Volts, 50 A capacity including connecting of the same to the supply with necessary fixing materials such as Aluminium jumpers, Aluminium binding wire etc. complete all as specified and as directed at site by the Engineer-in-Charge.

M&L for stringing and fixing in position of ACSR conductor in OH line connections as per site requirement including provision of aluminium binding wire complete all as specified.

Restringing of HT 3 lines of existing over head line of ACSR conductor after disconnecting from the insulators & jumpers to the required tension & sag & binding up & connecting to insulators & jumpers properly test complete,

Trimming /chopping off trees branches of any girth and distance up to 1.5 RM from the conductor (coming in the way/line) all as directed.

Dismantling ACSR conductor of any size

Supply and fixing indicating lamp red,blue,amber,green, white of operating voltage 24/110/230 volts including taking down u/s indicators

Supply and filling for toping up of transformer oil.

S&F PVC sleeves of 15 mm dia in RYB colour for protection of Jumper on HT/LT poles /structure all as directed

Danger notice plate Size HT 25 x 20 cm of 1.6mm thick mild steel sheet , vitreous enamelled white with letters figures and convention skull and bones in signal red colour and fixed with MS Clamp, bolts and nuts of approved of size including taking down rusted danger plates.

De-hydration and fillteration of transformer oil,HT OCB and LT OCB of any capcity and type installed at various locations without disturbing from its position to achieve of electric strength not less than 40KV all as specified and directed by Engr-in- Charge.

M&L for disconecting the transformer conections and taking down from its foundation , transporting to work shop/MES store yard or site , drain out the oil from chamber complete ,opening of transformer and lifting of core and winding cleaning of tank and core ,varnishing of winding for improvement of insulation resistance value reassembled the same and refilling of new transformer oil reconection the same on existing location or other location complete capacity of transformer 200/100/50 KVA all as directed .

M&L for spray painting of transformer of capacity 50 to 315 KVA

S& F Silica gel container (breather unit complete)suitable for existing transformers

ramesh construction co