Procurement Of Dc Drives Switchgear Spare For Ntpc Barauni , O / L Relay, B3l23, Bch, 09A Dc , Relay Thermal O / L 40-120A Bch Make , Contactor: Dc, 300A, 2P, D915y22a1, Bch , O / L Relay, B3p23, Bch , Contactor: Ce15cns3b3+C320kgtc2, Bch , Contactor: 915Y22b1, Bch , Contactor: D15cr22b3+C320kgtr22, Bch , Contactor, Power, 220Vdc, 150A, 2P, 3No+3Nc