supply of air circuit breaker, 3 pole, 800 amp., 750/690 volt, 50hz with built-in add-on block with 6 no +6 nc open air execution, thermal magnetic mv voltage release dni fixed type manually operated conform ing to rcf specification no. edts-103, rev.d, amdt.7 suitable for rajdhani / shatabdi power cars. make: as per bill of material of rcf spec. no. edts-103, rev.d, amdt.7 i.e. l&t cat. no. cncs800c / abb cat. no. e2 n800 / ge cat. no. rms-9d only. [ warranty period: 30 months after the date