FOR REPAIRING OF 160 KVA TO 630 KVA DAMAGED T/F AT GONDA WORKSHOP.

Amount

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

Reconditioning of L.V leg coils strips including removing of old double paper covering and cleaning of strip than providing double paper covering

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 old damaged H.V. leg coils wire by removing old Double paper covering, cleaning of wire and providing new DPC insulation etc.

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

Assembly of core, channel (dully 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.

Tightening/Welding the top cover after tanking of core and coil assembly into 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.

Anil Kumar Yadav