supply of insulation monitoring relay, 415v ac, 3 phase, neutral isolated. , 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/d c, place of installation s1a7, of bill of material of rdso spec. no. rdso/pe/spec/ac/0184-2015( rev.1), used for insulation control 415 v of lhb type ac coaches, confirming to rdso spec. n o. rdso/pe/spec/ac-0184-2015 (rev.1), suitable for lhb type ac coaches switch board. acceptabl e makes-abb. cabinet (s1a07), abb (cat no: cm-mps.43s.), schneider cat no. vigil ohm/imdim10, sie mens cat no. 3ug4581-1aw30/31, dold cat no: il 5880, contrel cat no. ir 470ly-21a, ri-r138. [ w arranty period: 30 months after the date of delivery ] ]