supply of (1) contactor for main transformer (nwp) current rating 170a-600v ac/ac-1,200a.50hz,main pole-4,aux contact 1no+1nc contral voltage 400-430v ac (2) feeder contactor, current rating 200 amps, voltage rating 750v ac main pole: 4 nos., aux contact: 2 no + 2 nc, control voltage-380-415v ac with surge suppressor (3) feeder contactor 4 pole, working voltage 750v +/- 10%, 50hz ac, suitable for net 1 & net 2 circuit of lhb non ac coaches(1) contactor for main transformer (nwp) current rating 170a-600v ac/ac-1,200a.50hz,main pole-4,aux contact 1no+1nc contral voltage 400-430v ac (2) feeder contactor, current rating 200 amps, voltage rating 750v ac main pole: 4 nos., aux contact: 2 no + 2 nc, control voltage-380-415v ac with surge suppressor (3) feeder contactor 4 pole, working voltage 750v +/- 10%, 50hz ac, suitable for net 1 & net 2 circuit of lhb non ac coaches,contactor for main transformer (nwp) current rating 170a-600v ac/ac-1,200a.50hz,main pole-4,aux contact 1no+1nc cont ral voltage 400-430v ac [ warranty period: 30 months after the date of delivery ] ] , feeder contactor, current rating 200 amps, voltage rating 750v ac main pole: 4 nos., aux contact: 2 no + 2 nc, control voltage-380-415v ac with surge suppressor for net-1 & net -2 in sbc of lhb ac coaches confirming to item no. 57 & 58 of bom of rdso specification no. rdso/pe/spec/ac/0184-2 015 (rev-0) & rdso letter for common bill of material el/7.1.108/mssbc dated 17.09.2021 [ warranty period: 30 months after the date of delivery ] ] , feeder contactor 4 pole, working voltage 750v +/- 10%, 50hz ac, suitable for net 1 & net 2 circuit of lhb non ac coaches, 100a current rating , operating coil voltage 110v ac, ac1 duty. auxilary contact with 2no+2nc block contact conforms to iec 60947-4.1.ui:1000vac/11:100a i.e.ac1 100a & r cf spec.no. edts 355 rev 01 or latest. similar to abb model no. af 50-40 ( product ref code 15bl357201) & auxiliary contact abb model no. ca-5-22e. fixin g dimensions of contactor shall