Insulation Monitoring Relay, 415V AC, 3Phase, Neutral Isolated, Voltage range 0- 500V AC, Insulation Measuring Range: 10 K OHM to 150 K OHM, Control volt.: 24- 240V AC/ DC, as per page No. 39, S. 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 ). Makes as per BOM ABB Cat. No.- CM. IWS. 2S, Schneider Cat No.- Vigil Ohm/ IMD- IM10, Siemens Cat. No. 3UG4581- 1AW30, Dold Cat. No.- IL5880, Contrel Cat. No.- IR 470LY- 21A, RI- R138, WOKA or Bender.