supply of insulation monitoring relayinsulation monitoring relay,insulation monitoring relay, 415v ac, 3 phase, neutral isolated, voltage rang e 0-500 v ac, insulation measuring range-10 k ohm to 150 k ohm, control voltage: 24 - 240 v ac/dc, as per page no: 39, s.no.63, item code: a2 and place of installation s1a7, of bill of m aterial of rdso spec. no. rdso/pe/spec/ac/0184-2015(rev.1), used for insulation control 41 5 v of lhb type ac coaches, confirming to rdso spec. no.rdso/pe/spec/ac-0184-2015 (rev.1), suitable for lhb type ac coaches switch board cabinet (s1a07). [ warranty period: 30 months aft er the date of delivery ]