supply of insulation monitoring relay, 415v ac, 3phase.insulation monitoring relay, 415v ac, 3phase.,insulation monitoring relay, 415v ac, 3phase, neutral isolated, voltage range 0-500v ac, insulation measuring range: 10 k ohm to 150 k ohm, control voltage: 24-240v ac/dc, as per page no.39, s.no.63, item code: a2 and place of installation s1a7, of bill of material of rdso specn. no. rdso/pe/spe c/ac/0184-2015 (rev.1), used for insulation control 415v of lhb type ac coaches suitable for lhb type ac coaches switch board cabinet (s1a07). acceptable makes & cat. no. abb cat.no.cm.iws.2s, schneider cat no. vigil ohm/imd-im10, siemens cat no.3ug4581-1aw30, dold cat no. il 5880, control cat no. ir 4 70ly-21a, ri-r138, woka or bender only. [ warranty period: 30 months after the date of delivery ] ]