supply of supply of insulation monitoring relaysupply of insulation monitoring relay,insulation monitoring relay, 415v ac, 3 phase, neutral isolated, voltage range 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 material of rdso spec. no. rd so/pe/spec/ac/0184-2015(rev.1), used for insulation control 415 v of lhb type ac coaches, confirmin g to rdso spec. no.rdso/pe/spec/ac-0184-2015 (rev.1), suitable for lhb type ac coaches switch board cabinet (s1a07). accepted make: abb:cm-iws.2s.or contrel make ir 470ly-21a, ri r138 or schneider make- vigil ohm/imd-im10 or siemens make- 3ug4581-1aw31 or dold make model no il5880 or woka make or b ender make. [ warranty period: 30 months after the date of delivery ] ] => limited