Complete repairing/overhauling of 400 amps 550v gec make ocb sl. no. 314711/117 local id.no. jl/sw/ocb/550v/17 at 2 pit jealgora colliery of amal. joyrampur colliery under lodna area.

Complete repairing of 800 amps 440 volt ocb switch ( old model) make crompton greaves local id. no. jl/sw/ocb/ 440v/15 sl.no. 71656/51 at 2 pit jealgora colliery of amal. joyrampur colliery under lodna area.

Complete repairing and overhauling of 1 no. 200 amps 440 volt kilburn make ocb switch sl.no.jl/sw/19 for controlling of 2 pit surface pump motor at jealgora colliery (sl.no.-1937) of amal.joyrampur colliery under lodna area.

(a) repairing/ overhauling of one(01) no.800amps 550volt r sl. no. bar/sw/ocb/08(b) repairing of 01(one) no. 100amps 550volt sd-15 busbar local id.no. joy/3/sw/ocb/17 at 5 pit sub-station of amal.joyrampur colliery under lodna area.

Complete repairing/ overhauling of one (01) no h.t. switch sl. no. jl/sw/40 primary controlling of 750 kva transformer installed at 2-pit jealgora colliery of amal. joyrampur colliery under lodna area.

Dismantling head gear structure at 6 pit lodna colliery of amal.joyrampur colliery under lodna area.

Complete repairing/ overhauling of 3.3 kv 400 amps flp type o.c.b. with busbar make rey-rolle-burn made in england at 7 pit old sub-station ct ratio 300/10 amps(id.no. jl/sw/21) serial no-2psf415 at jealgora colliery of amal.joyrampur under lodna ar

Partial repairing of 400 amps 11 kv gec make ocb switch at jealgora 2 pit sub-station for bus cupler feeder i and ii sl. no. m-414 colliery id jl/sw/ocb/11 kv/12 of amal. joyrampur colliery under lodna area.

Repairing and overhauling of 800 amp. 550 volt crompton parkinson make ocb switch with bus bar of jealgora 2 pit colliery id-bccl/jl/sw/ocb/550 volt/07 used as secondary controlling switch of 750 kva 11 kv/550 volt switch of ajc under lodna area.

Repairing of one(01) no.400amps 440volt g.e.c. make ocb switch with busbar sl. no.30/ 2135 and local id.no. kj/14 at 3 pit sub-station of kujama colliery under lodna area.