REPAIR/REPLACEMENT OF INSULATORS/HT VCB/RMU PANELS/MAINTENANCE OF TRANSFORMER AND TWO POLE STRUCTURE AND EARTH PITS AND ALLIED WORKS AT AF STN MOTHALA UNDER GE (AF) NALIYA

M & L for maintenance of VCB / RMU11 KV, 400/ 630 /1200 Amps including removal of VCB trolley, cleaning of all copper male and female contact, tightening of all connections, checking of all auxiliary contacts, control wiring, servicing of relays, etc. refixing the VCB trolley to its original position including proper setting of manual/motorize operation of VCB, checking/setting of tripping system, etc complete all as specified and directed by Engr-In-Charge. Note: (i) Maintenance to be carried out the reps of Authorized person. (ii) After completion test certificate shall be furnished. (iii) Calibration of relay by injecting High voltage through CTS checking the over load system of VCB upto 90% rated load and artificial fault creation and setting of relay by 10 to 15% of rated load removing u/s overload and earh fault relay including connection with power pack. (iv) Opening out the trolly checking the operation of VCB mechanically and electrically through shunt trip coil including energizing of springs automatically including checking of TNC switch.

M & L for taking down carefully Transformer / Isolation transformer/SVR of 100 KVA to 500 KVA and above capacity, any make, any type from pole / plinth/ base, disconnecting HT & LT side connections, earthing strip of transformer, supporting angles, cross arm, shifting / transporting transformer carefully from the site to the workshop opening the top cover of the transformer, bushing, draining of oil from the transformer, lifting the core complete taking out defective coils from the core, cleaning the tank and reassembling the transformer after carrying out the repairs/ replacement of worn out part, ovening the complete unit till to get desired megger value, transporting returning back to the site installing re-commissioning and testing of the transformer at its original place, connecting up HT & LT sides, earthings, supports / cross arms etc all as directed by Engr-In-Charge Note: Spares, Rewinding of transformer,reinsulating & heating if required will be measured and paid separately under respective Sch'A' items

S & F in repair Top cover gasket made up of 5 mm thick cork sheet.

S & F in repair HT bushing, porcelain vitreous brown body suitable for 11 KV as per IS 3347 complete all as specified and directed by Engr-In-Charge.

S & F in repair LT bushing, porcelain vitreous brown body 1100 V grade as per IS 3347 complete all as specified and directed by Engr-In-Charge.

S & F in repair HT brass studs along with washers for one terminal 11 KV transformer complete all as specified and directed by Engr-In-Charge.

S & F in repair LT brass studs along with washers for one terminal 1100 Volts grade transformers complete all as specified and directed by Engr-In-Charge.

S & F in repair Breather assembly complete with silica GEL of make Omkar/Kamal complete all as specified and directed by Engr-In-Charge.

S & F in repair Temp level indicator including its bolts, nuts, gasket etc complete all as specified and directed by Engr-In-Charge.

Taking down old / burnt out HT/LT coils and rewinding the same by super enameled copper winding wire / strips of appropriate size of super quality (as per existing material & size of transformer coils) including, insulating, varnishing, heating, keeping coils in position, etc for transformer up to 500 KVA complete all as specified and directed by Engr-In-Charge.