CERTAIN REPAIRS AND MAINTENANCE OF DISTRUBUTION AND POWER TRANSFORMERS AND CONNECTED ACCESSORIES AT RCI HYDERABAD

Amount

Disconnecting the electric supply, removing the HT and LT cable connections and taking out the Transformer of capacity upto 500KVA from the platform, lifting the Transformer with suitable crane and loading into the goods carrier and shifting the Transformer to workshop for repair and transporting it back for installation in its original location including connection of HT and LT cable connections complete all as directed.

All as per item No 1 but for Transformer of capacity 500KVA above and upto and including 2500KVA capacity complete all as directed. Note: Repairs to Transformer shall be carried out only by manufacture of Transformer i.e. M/s ESSENNAR/VIJAY ELECTRICALS/PETE/INDOTECH/KIRLOSKAR

Disconnecting the electric supply, removing the HT and LT cable connections of the defective Power transformer 132/11 KV of 8000KVA capacity, outdoor type any make, taking down from platform with the help of crane suitable for lifting upto 30Ton or using lifting jacks, loading into low bed trailer of minimum 30Ton load capacity 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 reinstallation 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 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 transformers of following capacities and draining out the Transformer oil, removing the inspection cover, lifting the core and removing the winding from the core and rewinding the unserviceable HV, LV coil turns with new electrolytic copper conductor, drying of the core and winding in the oven upto required IR values, assembling the core with new insulation for HV/LV winding, replace with the unserviceable LV/ HV bushing washers, oil seal, gaskets of inspections cover with new ones including overhauling of OLTC, painting of complete transformer and connecting of HV and LV cable connections complete all as specified and directed.

Note: HV/LV bush, transformer oil, LV/HV coils inspection cover gasket, transportation and testing of transformer will be measured and paid separately under relevant items.

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 will be measured and paid separately.

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

Contractor shall submit 24 months warranty for active part (Core and Coil assembly) from certified date of completion of work and if any defects noticed during this period shall be rectified free of cost.

500KVA capacity, 11/.433KV

600 to 2500KVA capacity, 11/.433KV

8000KVA capacity, 132/11KV

Supply only HV/LV coil winding with electrolytic super enamelled copper conductor of required gauge/size as per specification of old transformer for the following capacities complete all as specified.

500KVA capacity, 11/.433KV

600 to 2500KVA capacity, 11/.433KV

8000KVA capacity, 132/11KV

Supply only insulation for HV/LV winding with craft paper cotton tape insulation as per specification of old transformer for the following capacities complete all as specified.

500KVA capacity, 11/.433KV

600 to 2500KVA capacity, 11/.433KV

8000KVA capacity, 132/11KV

Opening of the 11 KV/.433KV transformer upto 500KVA capacity by removing the inspection cover/top cover, decanting of the transformer oil upto required level for replacement of LT/HT bush complete from the shell and replacement for burnt out LT/HT bush and gasket to avoid leakage of oil refilling back to existing oil into the transformer including testing and commissioning complete all as directed.

All as per item No 7 but for transformer above 500 and upto 1000KVA capacity complete all as directed. Note for item No 7 & 8: HT/LT bush & gasket will be measured and paid separately.

Supply only of HT bushing including metal parts and washer complete for any make of plinth/pole mounted transformer of above 500 KVA complete all as specified.

Supply only of HT bushing including metal parts and washer complete for any make of plinth/pole mounted transformer of above 500 and upto 1000KVA complete all as specified. Make for item No 9 & 10: CJI/AGARWAL PORCELAN

Supply only of LT rod/studs for transformer upto 500KVA made of brass with nut and washers, fittings etc., as per size and shape of original complete all as directed.

Supply only of LT rod/studs for transformer above 500 and upto 1000KVA made of brass with nut and washers, fittings etc., as per size and shape of original complete all as directed.

Supply only gasket set complete for transformer upto 500KVA capacity complete all as directed.

Supply only gasket set complete for transformer above 500 and upto 2500KVA capacity complete all as directed.

Supply only inspection cover gasket, radiators gasket, HT Cable box gasket and LT cable box gasket etc., suitable for 8 MVA power transformer complete all as specified and as directed. Note: All gasket for transformer shall be of grade SRC RC 70C

M&L, Spray painting for Transformer upto 500KVA capacity at site with two coats of grey synthetic enamel paint after removing all dust and rust and paint and writing the date of painting with white enamel paint complete all as directed.

All as per item No 16 above but for Transformer above 500KVA and upto 2500KVA capacity.

Testing of transformer of capacity upto 500KVA after carrying out repairs as per IS and checking oil leakage if any, stopping the leakage by welding if required complete all as directed.

Testing of transformer of capacity above 500KVA and upto 1000KVA after carrying out repairs as per IS and checking oil leakage if any, stopping the leakage by welding if required complete all as directed.

Replacement of air breather any type filled with silica gel upto 1000KVA Transformer complete all as specified and as directed.

Replacement of oil temperature gauge for transformer of capacities 500 to 750KVA complete all as directed.

Shifting of the transformer of the capacity upto 1000KVA from existing location to new location including disconnection and reconnection of HT/LT side jumper/cable/bus duct connection, testing complete all as directed. Note: Quoted rate shall be deemed to be inclusive of necessary crane and vehicle charges for shifting and installation of the transformer.

Supply and topping up of transformer oil conforming to IS: 335 (latest revision), dielectric strength not less than 60KV at 2.5mm gap in power transformer complete all as specified and directed. Make: Power Oil/Servo/Castrol/Shell Note: Test certificate shall be submitted all as specifed in PS Clause 5.2.3 on Sl page No 111

Dehydration of transformer oil of 8MVA power transformer and distribution transformers with ultra high vacuum filtration machine to obtain the dielectric strength of 60KV at 2.5mm gap complete all as directed

Conducting routine tests in the presence of representative nominated by the Accepting Officer to 132/11KV, 8MVA Transformer after installation including submitting of Test report in duplicate.

Conducting routine tests in the presence of representative nominated by the Accepting Officer to Transformer of capacity above 500KVA and upto 2500KVA after installation including submitting of Test report in duplicate.

Routine tests to be conducted against item No 25 & 26 IR values of HV to LV/HV to Earth and LV to Earth, Winding Resistance, Ratio test, No Load Test, Short Circuit Test, Transformer Tap Switch positions. Note: All measuring instruments and testing equipment required for testing shall be arranged by contractor.

M&L, painting to body of distribution transformers of capacity 160KVA installed at various indoor and outdoor Sub stations including connected LT bus duct from transformer to LT panel board with grey synthetic enamel paint using spray gun machine after removing all dust and rust and writing date of painting with black synthetic enamel paint complete all as directed.

All as per item No 27 above but for Transformers of capacity 315 to 500KVA

All as per item No 27 above but for Transformers of capacity 630 to 1500KVA

Indu Electricals

SUN LIGHT HOUSE

hari enterprises