supply of insulation monitoring relay.insulation monitoring relay., insulation monitoring relay 415v ac , 3 phase, neutral isolated, voltage r ange 0-500v ac, insulation measuring range 10k ohm to 150k ohm, control supply 24-24 0v ac / dc, as per item no. a-2, of rdso spec no. rdso / pe / spec / ac-0184-2015 ( rev.1 ) & place of installation s1a7 , used for insulation control 415v of lhb type ac coaches, confi rming to rdso spec. no. rdso / pe / spec / ac-0184-2015 ( rev-1 ) , suitable for switch board cabinet of lhb type ac coaches. accepted make as per sr. no. 68 of rdso letter no. el / 7.1.108 / mssbc, dated 17.09.2021. [ warranty period: 30 months after the date of delivery ] carriage stores depot rajasthan 17.00 numbers