supply of insulation monitoring relay(electrical) , insulation monitoring relay, 415 v ac, 3 phase, neutral isolated, voltage range - 0-500 v ac. in sulation measuring range - 10 k ohm to 150 k ohm, control voltage 24 v - 240 v ac / dc as per page no. 39, sl. no. 63, item code a2 and place of installation s1a7 of bill of material of rdso spec no.- rdso/pe/spec/ac /0184-2015 (rev.-1) or latest, accepted make -contrel,bender,woka,abb,schneider,siemens & dold only a s per bom lr no. el/7.1.108/mssbc dtd:- 17.09.2021 or latest, suitable for lhb ac coaches switch board ca binet (s1a7). as per spec-b [ warranty period: 30 months after the date of delivery ] ] , insulation monitoring relay (imr) to monitor 3 phase power supply of voltage range 110 v ac, measuring range 1-100 k ohm, control voltage 24-240 v ac/dc, output 1c/0 (spdt) contact system leakage capacitance 10 micro farad and place of installation s1a6, and as per rdso spec no.- rdso/pe/spec/ac/018 4-2015 (rev-1) or latest, accepted make -contrel,bender,woka,abb,schneider,siemens & dold only as per bom lr no.- el/7.1.108/ mssbc, date 17.09.21 or latest, suitable for lhb type ac coaches switch board cabi net (s1a06).as spec a [ warranty period: 30 months after the date of delivery ] ]