REPAIRS TO POWER TRANSFORMER BUS TRUNKING SYSTERM SF6 CIRCUIT BREAKER, CURRENT TRANSFORMERS VOLTAGE STABILIZERS BATTERY BANKS AND CERTAIN CONTROL CABLES AND SWITCH GEARS AT RCI HYDERABAD

Amount

Disconnecting the electric supply to the transformer, opening the transformer by unscrewing bolts from the top cover of the transformer, draining out of transformer oil into a container upto required level for arresting the leakage in the transformer, taking down of unserviceable HV and LV bushes from the transformer if necessary, replacement of top cover gasket, HV and LV side bushes gasket, buchholz relay gasket, bolts, nuts and washers, with new ones required soldering work if necessary while fixing the bushes, and re-fixng the same for transformer of capacity upto 250 KVA complete including testing the transformer after repairs all as specified and directed.

Note : (i) HT / LT metal studs, HT / LT bushes and gaskets of HT and LT side will be measured and paid for seperately as supply only under Sl Nos 5 to 16 here-in after. (ii) Nuts, bolts, washers, petrolium jelly, grease, CTC required are deemed to be included in the unit rate quoted. (iii) Filteration of drained out transformer oil will be measured and paid for separately.

All as per item No. 1 above but for capacity above 250 KVA and upto 500 KVA

All as per item No. 1 above but for capacity above 500 KVA and upto 1000 KVA

All as per item No. 1 above but for capacity above 1000 KVA and upto 1650 KVA

Supply and replace LT bush rods with metal parts suitable for transformers of any make and of capacity upto 250 KVA all as specified and directed by Engineer-in-Charge.

All as per item No.5 above but of capacity above 250 KVA and upto 500 KVA.

7. All as per item No.5 above but of capacity above 500 KVA and upto 1000 KVA.

All as per item No.5 above but of capacity above 1000 KVA and upto 1650 KVA.

Supply replace HT bush rods with metal parts suitable for any make of transformers upto 250 KVA capacity all as specified and directed by Engineer-in-Charge

All as per item No.9 above but of capacity above 250 KVA and upto 500 KVA.

All as per item No.9 above but of capacity above 500 KVA and upto 1000 KVA.

All as per item No.9 above but of capacity above 1000 KVA and upto 1650 KVA.

Supply and replace set of top cover gasket for transformers of capacity upto 250 KVA all as specified and directed by Engineer-in-Charge.

All as per item No.13 above but of capacity above 250 KVA and upto 500 KVA.

All as per item No.13 above but of capacity above 500 KVA and upto 1000 KVA.

All as per item No.13 above but of capacity above 1000 KVA and upto 1650 KVA.

M&L, locating fault in 11 KV HT underground cable of any sizes with the help of fault locator vehicle organized from TSSPDCL/TSTRANSCO by injecting necessary high voltage to the faulty cable within 12 hours of time from time of reporting of fault all as directed by Engineer in Charge. Note : Quoted rate shall deemed to be included the necessary charges towards liaisoning for arranging fault locating vehicle, transportation of trained technicians and charges payable to Electricity Department.

Supply and fix Current Transformer 11 KV, Ratio 300-150/1-1A, Core 1-CL 0.5 15 VA, Core 2-CL 5P10 15 VA, STC 26.3 KA for 1 Sec. Make : Straton Electricals Pvt Ltd

S&F in repairs of auxiliary power supply system of 110 Volts, 30 Amps for protection of VCB panel including synthetic rubber chamber, testing and commissioning complete by using a set of 55 Nos maintenance free lead acid batteries of 2 volts 80AH capacity each complete all as specified and directed. Note : The amount of batteries replaced will be measured and paid seperately.

S&F in repairs of 55 Nos maintenance free lead acid VRLA batteries of 2 volts 100AH capacity each for auxiliary power supply system of VCB panel protection including testing and commissioning complete all as specified and directed by Engineer-in-Charge. Make of Battery : AMARARAJA / EXIDE

Man-day services for checking of battery charger of battery banks, 110V DC control supply including checking of each cells OCV / Charger voltage & current complete all as specified and directed.

Supply and topping up transformer oil conforming to IS: 335 (1993), dielectric strength not less than 60 KV at 2.5 mm gap in various capacities distribution transformers installed at various indoor and outdoor sub stations complete all as specified and directed. Make: Power oil / SERVO / Castrol / Shell.

Dehydration of transformer oil of various capacities distribution transformers installed at various indoor and outdoor transformers with ultra high vaccum filtration machine to obtain the dielectric strength of 60 KV at 2.5 mm gap complete all as specified and directed.

Disconnecting the electric supply, removing the HT and LT cable connections of the defective Distribution transformer 11 / 440 V of 750 KVA capacity, outdoor / indoor type any make, taking down from platform with the help of crane suitable for lifting upto 750 KVA Transformer or using lifting jacks, loading into goods carrier with load capacity to load 750 KVA Transformer and transporting the same carefully to workshop for necessary repairs, taking all necessary precautions to avoid possible damage during transit and returning the same after carrying out repairs and re-installation at the same location using crane, re-establishing connections on HV and LV sides complete all as directed.

Note: Hire charge for crane and Trailer, charges for loading/ unloading and transportation are deemed to be included in quoted rate. Any mistake on the part of the contractor during dismantling, transporting and reassembling of transformer shall be made good without any extra cost to government. Decision of Accepting Officer shall be final and binding.

Opening top cover of 750 KVA capacity transformer, opening of top cover and draining out the Transformer oil, removing the inspection cover, lifting the core with suitable crane and cleaning all healthy parts including coils, laminations, tank, tap changer including sleeves, drying of assembled core and winding in oven upto required IR values, re-assembly of transformer by tanking the dried core and winding assembly, fixing of all oil valves, fittings of accessories, making terminal connections to external bushings, including painting of transformer tank externally with two coats of enamel paint and internally with two coats oil resistant paint, complete Routine tests, replacing unserviceable LV / HV bushings, washers, oil seal, gaskets of inspection cover, radiators, HT Cable box, LT cable box with new ones if necessary complete all as specified and directed.

Note: (i) HV / LV bush, copper insulation of LV / HV, transformer oil, LV / HV coils, oil seal gaskets of inspection cover, radiators, HT Cable box, LT cable box will be measured and paid separately as 'Supply Only' under relevant items. Labour elements for fixing of spares / parts mentioned as 'Supply only' is deemed to include in the unit rate quoted.

Transportation to Workshop and return will be measured and paid separately.

Testing of transformer as specified at Sl item No 40 of BoQ will be measured and paid separately.

Any hardware and minor items like nuts, bolts, washers, petroleum jelly, grease, CTC required for complete job are deemed to included in the quoted rate.

Filtration of transformer oil at site after installation will be measured and paid separately but for carrying out Routine tests after repairs in workshop shall be deemed to included in quoted rate.

All routine tests shall be carried out on Transformer in the presence of representative nominated by the Accepting Officer before dispatch of Transformer after carrying out repairs to the work site.

Contractor shall submit 12 months guarantee for no oil leakage in transformer and OLTC part from certified date of commissioning of transformer and if any defects are noticed during this period the same shall be rectified free of cost.

Painting, oven charges, labour for replacement of gasket, LT / HT bushes and breathers are measured and paid seperately

Providing of new insulation paper for winding in place of damaged LV & HV coil

Providing of new copper winding in place of damaged winding for HV

Labour for HV copper winding insulation

M&L for removal of active parts from tank, cleaning all healthy parts including coils, lamination, tank, tap changer including sleeves. Oven drying of assembled core and winding, re-assembliy of transformer by taking the dried core and winding assembly, fixing of all oil valves, fitting of accessories, making of terminal connections etc all as specified and directed by Engr-in-Charge

M&L for replacement of LT / HT bushes, top gasket, breathers etc of transformer 1000 KVA capacity complete all as specified and directed by Engr-in-Charge

M&L for preparation and cleaning the transformer of capacity 1000 KVA and painting of transformer tank externally with two coats of enamel paint and internally with two coats oil resistant paint complete all as specified and directed by Engr-in-Charge

Disconnecting the electric supply, removing the HT and LT cable connections of the defective Distribution transformer 11 / 440 V of 750 KVA capacity, outdoor / indoor type any make, taking down from platform with the help of crane suitable for lifting upto 750 KVA Transformer or using lifting jacks, loading into goods carrier with load capacity to load 750 KVA Transformer and transporting the same carefully to workshop for necessary repairs, taking all necessary precautions to avoid possible damage during transit and returning the same after carrying out repairs and re-installation at the same location using crane, re-establishing connections on HV and LV sides complete all as directed.

Note: Hire charge for crane and Trailer, charges for loading / unloading and transportation are deemed to be included in quoted rate. Any damage to the transformer by the contractor during dismantling, transporting and re-assembling of transformer shall be made good without any extra cost to government. Decision of Accepting Officer shall be final and binding.

Opening top cover of 750 KVA capacity transformer, opening of top cover and draining out the Transformer oil, removing the inspection cover, lifting the core with suitable crane and cleaning all healthy parts including coils, laminations, tank, tap changer including sleeves, drying of assembled core and winding in oven upto required IR values, re-assembly of transformer by tanking the dried core and winding assembly, fixing of all oil valves, fittings of accessories, making terminal connections to external bushings, including painting of transformer tank externally with two coats of enamel paint and internally with two coats oil resistant paint, complete Routine tests, replacing unserviceable LV / HV bushings, washers, oil seal, gaskets of inspection cover, radiators, HT Cable box, LT cable box with new ones if necessary complete all as specified and directed.

Note: (i) HV / LV bush, copper insulation of LV / HV, transformer oil, LV / HV coils, oil seal gaskets of inspection cover, radiators, HT Cable box, LT cable box will be measured and paid separately as 'Supply Only' under relevant items. Labour elements for fixing of spares / parts mentioned as 'Supply only' is deemed to include in the unit rate quoted.

Transportation to Workshop and return will be measured and paid separately.

Testing of transformer as specified at Sl item No 40 of BoQ will be measured and paid separately.

Any hardware and minor items like nuts, bolts, washers, petroleum jelly, grease, CTC required for complete job are deemed to included in the quoted rate.

Filtration of transformer oil at site after installation will be measured and paid separately but for carrying out Routine tests after repairs in workshop shall be deemed to included in quoted rate.

All routine tests shall be carried out on Transformer in the presence of representative nominated by the Accepting Officer before dispatch of Transformer after carrying out repairs to the work site.

Contractor shall submit 12 months guarantee for no oil leakage in transformer and OLTC part from certified date of commissioning of transformer and if any defects are noticed during this period the same shall be rectified free of cost.

Providing of new insulation paper for winding in place of damaged LV & HV coil

Providing of new copper winding in place of damaged winding for HV

Labour for HV copper winding insulation

M&L for removal of active parts from tank, cleaning all healthy parts including coils, lamination, tank, tap changer including sleeves. Oven drying of assembled core and winding, re-assembliy of transformer by taking the dried core and winding assembly, fixing of all oil valves, fitting of accessories, making of terminal connections etc all as specified and directed by Engr-in-Charge

M&L for replacement of LT / HT bushes, top gasket, breathers etc of transformer 750 KVA capacity complete all as specified and directed by Engr-in-Charge

M&L for preparation and cleaning the transformer of capacity 750 KVA and painting of transformer tank externally with two coats of enamel paint and internally with two coats oil resistant paint complete all as specified and directed by Engr-in-Charge

M&L for conducting the following tests after repairs of transformers of 750 KVA & 1000 KVA including submitting the test report. (i) I.R values of HV to LV, HV to Earth and LV to Earth. (ii) winding resistance. (iii) Ratio test (iv) No-load test (v) Short circuit test (vi) Dielectric strength of oil (vii) Transfomer tap switch positions Note : contractor shall arrange all measuring instuments/equipment for testing of transformer.

Taking down the defective air breathers from the transformers, supply and fix new breathers with flange type 1/2 Kg bottle suitable for step down distribution transformers of any make and capacity ranging from 63 KVA to 160 KVA including filling of new silica gel in breathers complete all as specified and directed.

Taking down the defective air breathers from the transformers, supply and fix new breathers with flange type 1 Kg bottle suitable for step down transformers of any make and capacity ranging from 315 KVA to 500 KVA including filling of new silica gel in breathers complete all as specified and directed.

Taking down the defective air breathers from the transformers, supply and fix new breathers with flange type 2 Kg bottle suitable for step down distribution transformers of any make and capacity ranging from 630 KVA to 1500 KVA including filling of new silica gel in breathers complete all as specified and directed.

Supply and fix cable jointing kit for 11 KV (Earthed) grade Indoor/Out door cable for heat shrink type End Joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 120 Sqmm to 185 sqmm

Supply and fix cable jointing kit for 11 KV (Earthed) grade Indoor/Out door cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 50 Sqmm to 95 sqmm

Supply and fix cable jointing kit for 11 KV (Earthed) grade Indoor/Out door cable for straight through heat shrink type joint complete with jointing material and accessories suitable for 3 core XLPE armoured Al conductor cable of size 120 Sqmm to 185 sqmm

M/S PAVANI ENTERPRISES

UNITY ENGINEERING TRADERS

MM PROJECTS

Shreshta Associates

SUN LIGHT HOUSE

S.S.ENGINEERING CORPORATION

SHRI GANESH ENTERPRISES