supply retrofitting and commissioning of 1 no. acb in 0.4kv dam control mcc and 01 no. acb at bhps mppgcl birsinghpur supply retrofitting and commissioning of 1 no. acb in 0.4kv dam control mcc and 01 no. acb at bhps mppgcl birsinghpur , 630 amp., 0.4 kv, 50 ka fp electrically operated drawout type air circuit breaker with microprocessor based over current, earth fault, short circuit feeder protection& other standard accessories i ) motor & closing coil 240v ac ii ) u / v coil 240 v ac iii ) shunt trip coil 24 vdc iv ) 4no+ 4nc contact module size: height×breath×depth 9750×450×480 at dam control mcc as per tenderschedule. , 630 amp., 0.4 kv, 50 ka fp electrically operated drawout type air circuit breaker with microprocessor based over current, earth fault, short circuit feeder protection & other standard accessories i ) motor & closing coil 220 + / - 10% vdc ii ) u / v coil 240 v ac iii ) shunt trip coil 220 + / - 10% vdc iv ) 4no+ 4nc contact module size: height×breath×depth 9750×450×480 at bhps mcc , work portion , the presently installed 0.4 kv, 400 a switch fuse unit ( sfu ) module at 0.4 kv dam control room mcc and hydel control room mcc is to be replaced by the above acbs and then commissioning of the above air circuit breakers in all respect.