bids are invited for procurement of mine line switch gears spares- cover fixing bolt, cover bolts, isolator assembly k4 on off, 300a, overload assembly-breaker 110a-200a, roller assly roller carreige and roller, busbar, push button actuator for el test, push button actuator for el reset, incoming gland, outgoing gland, limit switch no nc for breaker, brass terminals, push button with spindle, earth leakage relay 50-750ma with time l, h t hrc pt fuse, insulator support for ht pt fuse, potential transformer 3 point 3kv 500va, current transformer 60 5, 15va, aux contactor with coil, no nc actuator for flp, ht power fuse 3 point 3kv grade upto 100a, 15v is signalling bell, signalling transformer 110 15v with isol, current transformer for overload, thermal ol relay ctr 120 5 range 48a-12.