supply of insulation monitoring relayinsulation monitoring relay,insulation monitoring relay rated 415 volts, 3 phase neutral isolated voltage - range 0 to 500 volts ac, insulation measuring range 0 to 500 volt ac, insulation measuring range 10 kilo ohm to 150 kilo ohm, control supply 230 volts %b1 10%, 50 hz having fault me mory test reset button and alarm lead as per rdso specification no rdso/pe/spec/0192 -2018 (r ev-1). make: m/s bender- ir 470ly-21a or equivalent of m/s abb or m/s contrel or m/s woka or m/s-schneider or m/s-siemens or m/s-dold. (to be supplied with oems proof of purchase along with test certificate.) [ warranty period: 30 months after the date of delivery ] ] => limited