REPAIRING OF 10 KVA TO 25 KVA DAMAGED T/F AT LAKHIMPUR WORKSHOP.

Amount

Part-A 10 KVA, 16 KVA & 25 KVA

Handing and Dragging of Transformer from stacking yard to repairing hall with accessories.

Cutting/Opening of top cover plates & fitting of the transformers, draining of its oil & Detanking of core & coil Assembly.

Dismantling of core & coil Assembly and cleaning of core and tank (inside) by using warm old oil and hot air making it dirt free/sludge free.

Reconditioning/ Making of L.V leg coils from reconditioned strips/new DPC strips, of same size and No. of turns and dimensions as old one.

Reconditioning of L.V leg coils strips including removing of old DPC covering then providing double paper covering and making of LV Leg coils of same size and No. of turns and dimensions as old one.

Reconditioning/Making of H.V leg coils from new DPC or SE wire of same size and No. of turns and dimensions as old one.

Assembly of core, channel (duly painted by zinc chromatic paint) & coil and fitting of other parts requiring replacements such as press board making supports between adjacent section by insulating spacers & tapping etc.

Shifting and keeping the assembled core& coil etc. in OVEN from the repairing area.

Dragging of transformer tank to washing area and cleaning of rust/dirt etc from outer surface by using caustic soda & water solution.

Repairing of damaged T/F body/radiator by electric/gas welding complete in all respect for arresting oil leakage.

Completely drying & Cleaning of T/F tank (inside and outside) by using hot air/cotton waste/sand paper etc completely and making it ready for painting

Painting of inner side of T/F tank with heatproof zinc chromatic paints in two coats after providing primer of red oxide paint.

Dragging/shifting out empty tank after painting to assembly area.

Taking out core and coils assembly from the OVEN and shifting to repairing area & again tightening the assembly.

Welding/fixing the top cover after tanking of core and coil assembly into painted tank and tightening of assembly into the tank and fitting all accessories of transformer and filling of oil.

Spray painting of transformer tank from outside with super enamel synthetic Grey paint in two coats after providing primer of red oxide paint

Dragging/shifting of repaired T/F near to the test cabin/testing place and dragging /shifting T/F to yard after testing and its stacking at identified place.

In case of Minor fault.

Making of broken delta/Star connection with suitable size of Alu. Ferrule/soldering the joint with suitable brazing rod including all associated work.

Making of broken HV/LV lead connection with suitable size of Alu. Ferrule including all associated work.

Part-B Round Body Single Phase 10 KVA & 16 KVA

Handling and Dragging of damaged Transformer from stacking yard to repairing hall with accessories

Cutting/Opening of top cover plates & fittings of the transformers, draining of its oil & Detanking of core & coil Assembly.

Dismantling of core & coil Assembly and its cleaning.

Dismantling of Shell Core and coil assembly. Removing of HV and LV Leg coils for assessing its reuse, reuse of major insulating material if possible, checking and recording of physical dimensions of coil.

Making of complete HV & LV leg Alu. Leg coils identical to original one with same number of turns, weight etc providing super enameled/DPC conductor/ Strip confirming to IS 1971 153 in place of old and damage coil. Alu.coil, wire strip will be provided by the department. All coil assembly of identical voltage shall be interchangeable without requiring any special equipment. Shell Coil shall be supported between adjacent sections by insulations (flick Paper) Paper, spacers, beamers and other insulations. Rewinding shall be arranged to ensure free circulation of oil to reduced hot spots in winding. The insulation of coil shall be treated with suitable insulating, varnish or equivalent compound to develop the full electrical strength of

Assembly of Shell core (Three Limbs) coils and fitting of top and other parts. Replacement of insulation such as press board, craft paper, making support between adjacent section by insulating spacers and wrapping etc. shifting of repaired core coil assembly and placement inside the oven for proper dry out.

Shifting and keeping the assembled core& coil etc. in OVEN from the repairing hall

Dragging of transformers tank from the repairing hall to washing area and its complete washing, cleaning, removing of rust and carbon etc.

Repairing of damaged T/F body/radiator by electric/gas welding complete in all respect for arresting oil leakage.

Painting of inner side of T/F tank with heatproof zinc chromatic paints in two coats after providing primer of red oxide paint.

Dragging/shifting out completely dried empty tank after painting to repairing hall.

Taking out core and coils assembly from the OVEN and shifting to repairing hall.

Welding/Tightening the top cover after tanking of core and coil assembly into painted tank and tightening of assembly into the tank and fitting all accessories of transformer and filling of oil.

Spray painting of transformer tank from outside with supper enamel synthetic Grey paint in two coats after providing primer of red oxide paint

Dragging/shifting of repaired T/F near to the test cabin/testing place and dragging /shifting T/F to yard after testing and its stacking at identified place.

In case of Minor fault.

Making of broken delta/Star connection with suitable size of Alu. Ferrule/soldering the joint with suitable brazing rod including all associated work.

Making of broken HV/LV lead connection with suitable size of Alu. Ferrule including all associated work.

M/S KUMAR AND CO (BID ID -5517265)

M/S HONEY ENTERPRISES (BID ID -5517945)

R.D. ENTERPRISES (BID ID -5520884)