INSULATION MONITORING RELAY 415 VOLTS A.C, 3 PHASE NEUTRAL ISOLATED, VOLTAGE RANGE: 0 TO 500 VOLTS A.C,INSULATION MEASURING RANGE: 10 KILO OHM TO 150 KILO OHM, CONTROL SUPPLY 24- 240 VOLTS AC/DC +/-10 Percent , 50Hz, MAKE:- CONTREL MAKE- IR 470LY- 21A, RI-R138, ABB MAKE- CM-IWS.2S, SCHNEIDER MAKE- VIGILOHM/IMD-IM10, SIEMENS MAKE-3UG4581-1AW31 OR DOLD MAKE-IL5880.12 OR WOKA MAKE OR BENDER MAKE ONLY CONFIRMING TO RDSO LETTER NO: EL/7.1.108/MSSBC DT:17-09-2021 FOR COMMON BILL OF MATERIAL ITEMS.