Repairing of Damage Tfs

Handling and dragging of transformer from stacking yard to repairing hall.

10KVA (Core Type)

10KVA (Shell Type)

Cutting of Sealed transformers top cover plate smoothly and uniformally by gas/chisel cutter or opening of top cover plat and detanking of core and coil assembly.

10KVA (Core Type)

10KVA (Shell Type)

Dragging of the tank from the repaired hall to yard. & cleaning oil and dust etc. and scraping the rust etc and Washing of Transformer tank with Caustic Soda & water, Caustic soda shall be provided by contractor

10KVA (Core Type)

10KVA (Shell Type)

Painting of inner side of transformer tank and channels with heat proof zinc chromate paint of good quality (Berger, Nerolac, Jenson & Nicholson etc) shall be

10KVA (Core Type)

10KVA (Shell Type)

Dragging out empty tank from yard to repairing hall.

10KVA (Core Type)

10KVA (Shell Type)

Dismantling core and coil assembly and cleaning of dust and dirt from the core assembly and checking of LV and HV leg coils for assessing its reuse, rechecking and recording of physical dimensions of coil and cleaning of core and their components etc.

10KVA (Core Type)

10KVA (Shell Type)

Reconditioning of minor damaged in HV/LV leg coil/ Strip of transformer. work includes removing of damage part DPC insulation and providing new DPC on same HV coil/LV Strip should be properly cleaned and should be made of same size as of original .

‘‘Making of complete 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 /53 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. Coil shall be supported between adjacent sections by insulations, 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 winding as per original design.

10KVA (Core Type)

10KVA (Shell Type)

‘‘Making of complete HV 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 /53 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. Coil shall be supported between adjacent sections by insulations, 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 winding as per original design.

10KVA (Core Type)

10KVA (Shell Type)

Assembly of core and coils and fitting of other parts requiring replacement such as press board, making supports between adjacent sections by insulating spares and rapping etc & tapping etc. (Breezing/soldering) required, shall be arrange by the contractor.

10KVA (Core Type)

10KVA (Shell Type)

Shifting and keeping the assembled core coil etc. in Oven from the repairing and assembly place.

10KVA (Core Type)

10KVA (Shell Type)

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

10KVA (Core Type)

10KVA (Shell Type)

Retanking of complete assembly into painted tank and lightening of the assembly in the tank safely. Fitting of all accessories of the transformer.

10KVA (Core Type)

10KVA (Shell Type)

Welding of repaired transformers including of top cover plate by electric core welding filling of gaps or fixing of top cover plate by properly nuts & bolts to prevent seepage of water..

10KVA (Core Type)

10KVA (Shell Type)

Painting of t/f outside with super enamel synethics paint of yellow color in two coats after providing primer of red oxide paint etc. paint & painting materials shall be provided by contractor.

10KVA (Core Type)

10KVA (Shell Type)

Dragging of repaired T/f upto the test cabin/testing place for testing and their re-dragging to yard and its stacking at indentified place after testing

10KVA (Core Type)

10KVA (Shell Type)

Testing the correctness of connection, DVDF, No load, load loss test (where available), High Voltage, impedance voltage, Short Circuit and open circuit test, Voltage ratio on various tap position.

10KVA (Core Type)

10KVA (Shell Type)

Punching and welding of M.S. Plate on outside of transformer of size 100 mm x 50mm x 3 mm containing/ punching. (a) of unique number as decided by the department with a punch head. (b) Date of repair.

10KVA (Core Type)

10KVA (Shell Type)

SHREEYA ENTERPRISES (BID ID -5083207)

ABHISHEK ASSOCIATES (BID ID -5085889)

Engineers India