procurement of various micom numerical relays for ht switchgear of ahp and rwph for emd-iv , stps , sarni . , various micom p220 , p122 , p921 & p127 numerical relay of ht switch gear of ash handling plant and raw water pump house , micom p127 directional/non-directional relay - 50/51 3 phase over current , 50/51n earth over current , 64n restricted earth fault , 67p 3 phase directional over current , 67n earth fault directional over current , derived earth fault , voltage controlled over current , 3 phase undercurrent , negative phase sequence over current , phase under/over voltage ( and & or mode ) etc . ref no . : p127 ba2z112ca1 sr . no . 31741693 , 0 . 001 - 8ion 1/5a , vx 24- 250vdc/ 24-240vac , 50/60hz , motor protection relays micom p220- [49] thermal overload , [50/51] phase over current , [50n/51n] earth fault , [46] unbalance , [48] excess long start , [51lr-50s] blocked rotor , [37] loss of load & [49/38] thermal overload ( optional ) or [49] thermistance ref no . : p220 c00m11100 sr . no . 31740298 , 0 . 002 - 1ion 1/5a , vx 130- 250vdc/ 110-250vac , 50/60hz , micom p122- undercurrent / loss of load , negative phase sequence over current , broken conductor , earth over current / sensitive earth fault , 3 phase overcurrent , circuit breaker failure , restricted earthfault ref no . : p122 b00z112cc1 sr . no . 31666521 , 0 . 001 - 8ion 1/5a , vx 24- 250vdc/ 24-240vac , 50/60hz , micom p921 voltage and frequency relays - phase-to-neutral or phase-to-phase voltageprotection , phase under voltage ( and/or logic ) , phase over voltage ( and/or logic ) , zero-sequence over voltage , ref no . : p921 0asz112bb1 sr . no . 31673397 , un 57- 130vac , vx 24- 250vdc/ 24-240vac , 50/60hz