supply of insulation monitoring relay , insulation monitoring relay, 415v ac, 3 phase, neutral isolated, voltage range 0-500v ac, insulation measuring range 10k ohm to 150k ohm, control supply 24-240v ac/dc, pl ace of installation - s1a7, used for insulation control of 415v in lhb type ac coaches, confi rming to rdso specification no. rdso/pe/spec/ac-0184-2015 (rev-1), suitable for switch board cabinet of lhb type ac coaches. accepted make & cat no.: 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 ] ] , insulation monitoring relay 110v ac, measuring range 1 k ohm to 100 k ohm, con trol voltage range 24-240v ac/dc, output 1c/o (spdt) contact, system leakage capacitance 1 0 micro farad. conforming to rdso specification no. rdso/pe/spec/ac/0184- 2015 (rev-1), used for insulation control 110v of lhb type ac coaches, accepted make & cat. no.: as per sr. no. 6 7 of the common bom list issued vide rdso letter no. el/7.1.108/mssbc dated 17.09.2021, [ warranty p eriod: 30 months after the date of delivery ] ]