REPAIR /MAINT OF TRANSFORMER, DE-HYDRATION AND FILTRATION OF TRANSFORMER OIL, CALIBRATION OF HT EQPT AND OTHER ALLIED WORKS AT FATEHGARH CANTT

Dismantling and taking down Automatic Voltage Regulator (AVR) of 5000 kVA capacity from its installed position at any location under AGE (I), Fatehgarh for repair/rewinding, including disconnecting/opening HV and LV electrical connections and earthing connections, transporting the AVR to the workshop and back, and refixing the same after repair, including installation, testing and commissioning, complete all as specified and directed , comprising the following:- (a) Transportation of the AVR to the workshop at Unnao/Kanpur etc and back to the site by arranging all necessary T&P, including crane, recovery vehicle, tripod and other lifting equipment, as required. (b) Opening the AVR cover by removing serviceable/unserviceable nuts, bolts and washers in the presence of the Engineer-in-Charge. (c) Lifting and dismantling the primary (HT) and secondary (LT) windings and other internal components carefully, displaying all dismantled parts for inspection by the Engineer-in-Charge without causing any damage. (d) Refilling/topping up with new transformer oil after dehydration and filtration of the AVR. (e) Reassembling the AVR complete using all existing serviceable parts and replacement of defective parts such as rubber bushes, insulators stud etc shall be deemed to be included in the quoted rate, wherever ordered by the Engineer-in-Charge. (f) Reinstalling the AVR at its original location after repair, reconnecting HV and LV electrical connections and earthing connections, and carrying out testing and commissioning to the complete satisfaction of the Engineer-in-Charge under full load conditions. Note:- (i) Payment for rewinding shall be made under relevant items on the actual weight of the finished coil before varnishing and baking. (ii) Transformer oil shall be measured and paid for separately under relevant item of work (iii) The cost of renewal of nuts, bolts and washers of adequate size for the AVR top cover and other minor extras shall be deemed to be included in the quoted unit rate.

Dismantling and taking out transformer of capacity 100 kVA to 630 kVA, 11/0.433 kV, 100 kVA, 33/0.433 kV and 1500 kVA, 33/11 kV, from its installed position at any location under AGE (I), Fatehgarh for repair/rewinding, including disconnecting/opening HV and LV electrical connections and earthing connections, transporting the transformer to the workshop and back, and refixing the same after repair, including installation, testing and commissioning, complete all as specified and directed, comprising the following:- (a) Transportation of the transformer to the workshop at Unnao/Kanpur etc and back to the site by arranging all necessary T&P, including crane, recovery vehicle, tripod and other lifting equipment, as directed. (b) Opening the transformer top cover by removing serviceable/unserviceable nuts, bolts and washers in the presence of the Engineer-in-Charge. (c) Lifting and dismantling the primary coil (HT) and secondary coil (LT) and other internal components carefully, displaying all dismantled parts for inspection by the Engineer-in-Charge without causing any damage. (d) Refilling/topping up with new transformer oil after dehydration and filtration of the transformer. (e) Reassembling the transformer complete using all existing serviceable parts and replacement of defective parts such as rubber bushes, insulators stud etc shall be deemed to be included in the quoted rate, wherever ordered by the Engineer-in-Charge. (f) Reinstalling the transformer at its original location after repair, reconnecting HV and LV electrical connections and earthing connections, and carrying out testing and commissioning under full-load conditions to the complete satisfaction of the Engineer-in-Charge. Note:- (i) Payment for rewinding shall be paid for separately under relevant item on the actual weight of the finished coil before varnishing and baking. (ii) Transformer oil and replacement of defective parts shall be measured and paid for separately under relevant item of work. (iii) The cost of renewal of nuts, bolts and washers of adequate size for the transformer top cover and other minor extras shall be deemed to be included in the quoted unit rate.

M & L for rewinding the HT coil of 33/33 kV, 5000 kVA AVR using proper size double paper covered (DPC) copper winding wire and approved insulating materials, including carefully dismantling and removing the burnt/unserviceable copper winding, rewinding the HT coil, providing insulation, varnishing, baking/heating the rewound coil in a heat chamber, and reassembling the coil ready for installation, complete all as specified and directed. Note:- Payment shall be made for the actual weight of the finished HT coil before varnishing and baking.

M & L for rewinding the LV coil of 33/33 kV, 5000 kVA capacity AVR using proper size double paper covered (DPC) copper winding wire and approved insulating materials, including carefully dismantling and removing the burnt/unserviceable copper winding, rewinding the LV coil, providing insulation, varnishing, baking/heating the rewound coil in a heat chamber, and making the coil ready for reassembly, complete all as specified and directed. Note:- Payment shall be made for the actual weight of the finished LV coil before varnishing and baking.

M & L for rewinding the HT coil of 11/0.433 kV transformer of any capacity using proper size double paper covered (DPC) copper winding wire and approved insulating materials, including carefully dismantling and removing the burnt/unserviceable copper winding, rewinding the HT coil, providing insulation, varnishing, baking/heating the rewound coil in a heat chamber, and making the coil ready for reassembly, complete all as specified and directed. Note:- Payment shall be made for the actual weight of the finished HT coil before varnishing and baking.

M & L for rewinding the LT coil of 33/11 kV and 11/0.433 kV transformers of any capacity using proper size double paper covered (DPC) copper winding wire and approved insulating materials, including carefully dismantling and removing the burnt/unserviceable copper winding, rewinding the LT coil, providing insulation, varnishing, baking/heating the rewound coil in a heat chamber, and making the coil ready for reassembly, complete all as specified and directed. Note:- Payment shall be made for the actual weight of the finished LT coil before varnishing and baking.

Dehydration and filtration of existing transformer oil of transformers having capacity ranging from 100 kVA to 1500 kVA (33/11/0.433 kV) and AVR transformer of 5 MVA (33 kV), at site and at different locations, without disturbing the power supply system, using a filtration machine with heating arrangement to achieve a minimum dielectric strength of 60 kV (minumum) at 2.5 mm electrode gap, complete all as specified and directed. Note:- (i) Testing of transformer/HT switchgear insulating oil before and after dehydration and filtration shall be carried out as directed by the Engineer-in-Charge and the quoted rate shall be deemed to be inclusive for the same. (ii) The unit of payment for this item shall be per litre of oil actually processed, including dehydration, filtration and all associated operations required for complete execution of the work.

Supply, filling in replacement of old unserviceable transformer oil with new transformer oil conforming to IS:335-1993, in topping up to the required level of transformer oil capacity after rewinding of the unserviceable transformer, complete all as specified and directed. Note:-The dielectric strength of the transformer oil shall not be less than 60 kV at 2.5 mm electrode gap.

Supply and filling of transformer oil conforming to IS:335-1993, in topping up to the required level of transformer oil capacity, complete all as specified and directed. Note:-The dielectric strength of the transformer oil shall not be less than 60 kV at 2.5 mm electrode gap.

Supply and replacement of silica gel in crystal form for the breather assembly of transformers having capacity up to 1500 kVA at the installed site, complete all as specified and directed.