Repairing and maintenance of 11kv and 3.3kv bus bar of 2 mva , dumerbera sub-station along with repairing of damaged wall and fixing of existing main gate of 2mva dumerbera sub-station of ara project under kuju area

Repairing and complete rewinding of the national electrical indus ltd. make ,1mva,11kv/3.3kv, s.no. ry/775 , power transformer installed at dumerbera substation of ara colliery under kuju area.

Supply and installation of 4 nos of timer switch sets to be installed at different location of ara colliery to control the lights installed at po office, dumerbera sub-station, ara kanta substation and 16b quarry of ara colliery under kuju area.

Installation of oil and winding temperature meter with buchholz relay assembley in crompton parkinson make, 1000kva, 11kv/550v transformer of 2 seam s/s of east basuria colliery

Repairing of safety devices such as buchholz relay,oil temp relay,wind temp relay,buchholz relay,breather assembly of power transformer of 1000kva,11kv/3.3kv,sl.no.15478 of kharkharee colliery of govindpur area.

Con of existing ideal 3.3kv oh line (between ara-kanta sub-station and dumerbera sub-station) into 11kv oh line for supplying 11kv power to sarubera 10no. sub-station separately (by a dedicated feeder) from ara kanta sub-station

Maintenance and repairing of 02 nos 1mva 11kv/3.3kv power transformer and 2 mva booster transformer 11kv at site with bucholz relay alarm bell system at main substation and mines substation of karma project under kuju area.

Repairing/reconditioning of 3.3kv, 400a, reyroll burn make ocb. sl.no. 82/104, installed at dumerbera sub-station for controlling 3.3kv power supply 10 16b quarry of ara colllery. repairing/reconditioning of 11 kv, 400 amp, ocb of ara colliery.

Providing and fixing safety devices buchholz relay,wti and oti, explosion vent and conservator tank of (1) 1 mva transformer 11kv/3.3 kv and (2) 1.6 mva transformer 11kv/3.3kv installed at new filter house sub-station under jarangdih colliery.

Rewinding and repairing of 160kva, 3.3kv/440 v power transformer installed at kuju sub-station and 250 kva 3.3kv/440 v power transformer si no-8718/2 installed at hesagaria colony of kuju colliery under kuju area.