REPAIR MAINT OF DISTRIBUTION TRANSFORMER VCBs AND CONNECTED HT DISTRIBUTION NETWORK AT MIRAN SAHIB ML STN UNDER GE JAMMU

Material and labour for disconnecting Transformer 11/0.433 KV of capacity 250 KVA to 400 KVA, removal of incoming & outgoing electric connection and taking down carefully from four pole/two pole structure/platform, shifting to workshop draining out transformer oil, opening of top frame taking out the core from the tank, dismantling core into the parts cleaning the tank and removing out the dust particles refixing the same after necessary realignment and heat treatment, connecting all the electric connections and making the Transformer absolutely leak proof, refilling the Transformer oil, testing the Transformer at workshop, transporting back to site and fixing to position as directed, making all electrical and earth lead connection commissioning and testing of Transformer on load at least for 12 hours, re-installing the transformer and making connection complete, all as specified and directed by Engr-in-Charge. Note: (i) Transportation of Transformer shall be included in the quoted rate only. (ii) Cost of glass Sleeves/ ebonite sleeves insulating material tapes etc shall be included in the quoted rate only. (iii) Rewinding of HT/LT coils, cork sheet for top cover gasket, new brushing bush rod tap changer gear shall be measured and paid for separately under relvant item.

Material and labour for disconnecting Transformer 11/0.433 KV of capacity 50 KVA to 200 KVA, removal of incoming & outgoing electric connection and taking down Carefully from four pole/two pole structure/platform, shifting to workshop draining out transformer oil, opening of top frame taking out the core from the tank, dismantling core into the parts cleaning the tank and removing out the dust particles refixing the same after necessary realignment and heat treatment, connecting all the electric connections and making the Transformer absolutely leak proof, refilling the Transformer oil, testing the Transformer at workshop, transporting back to site and fixing to position as directed, making all electrical and earth lead connection commissioning and testing of Transformer on load at least for 12 hours, re-installing the transformer and making connection complete, all as specified and directed by Engr-in-Charge. Note: (i) Transportation of Transformer shall be included in the quoted rate only. (ii) Cost of glass Sleeves/ ebonite sleeves insulating material tapes etc shall be included in the quoted rate only. (iii) Rewinding of HT/LT coils, cork sheet for top cover gasket, new brushing bush rod tap changer gear shall be measured and paid for separately under relvant item.

Material and labour for rewinding of HT coils Transformer 50 to 400 KVA with super enamelled double paper wound copper winding wire of existing size and number of turns alongwith insulating material like paper insulation cotton tape, bamboo strip, emery paper packing, varnishing etc, demoisturing by heating and drying etc including primaray testing, ratio testing, no load testing core bolt insulation testing complete, all as specified and directed by Engr-in-Charge. Note: Rewinding and testing of transformer to be carried out through approved firm.

Material and labour for rewinding of LT coils Transformer 50 to 400 KVA with super enamelled double paper wound copper winding wire of existing size and no of turns alongwith insulating material like leathorised paper insulation cotton tape, wooden block packing, varnishing etc, demoisturing by heating and drying etc including primaray testing, ratio testing, no load testing core bolt insulation tesing complete, all as specified and directed by Engr-in-Charge. Note: Rewinding and testing of transformer to be carried out through approved firm.

Material and labour for taking out old LT winding wire and reconditioning of existing LT copper coil with new insulating material, with leathorised paper insulation, cotton tapes, wooden block packing and PVC sleeves, soldering and varnishing, heating, drying and testing of coils for transformer of capacity from 50 to 400 KVA complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement HT brass/gun metal bush connecting rod of suitable length and dia with necessary nuts, washers and bushing packing to prevent oil leaking from the bushes and HT insulators including making necessary connections for transformer capacity from 50 KVA to 400 KVA complete, all as specified and directed by Engr-in-Charge.

Supply and fixing in replacement LT brass/gun metal bush connecting rod of suitable length and dia with necessary nuts, washers and bushes and LT insulators packing to prevent oil leaking from the bushes including making necessary connections for transformer capacity from 50 KVA to 400 KVA complete, all as specified and directed by Engr-in-Charge.

Supply and fixing silica gel breather assembly of metallic body for 11 KV transformer of capacity from 50 KVA to 400 KVA complete, all as specified and directed by Engr-in-Charge.

Supply and fixing cork sheet gasket of 6mm thick cut to size/Shape for top cover of 11 KV transformer of capacity up to 400 KVA complete, all as specified and directed by Engr-in-Charge.

Dehydration, filtration of step down (11/0.415 KV) transformer oil of various cap of transformers on running condition of transformer, dielectric strength not less than 60 KV in 2.5 mm gap (RMS) complete, all as specified and directed by Engr-in-Charge. Notes :- (i) Dehydration and filtration can be carried out at site by bringing filtration machine or other wise the same shall be got done from the manufacturing workshop of transformers. (ii) Testing oil shall be carried out before filtration and after filtration of insulating oil. (iii) Rates of dehydration machine used shall be included in the rate quoted.