Insulation Monitoring Device (Relay) For A Three-Phase 750V Power Circuit Conforming To Rdso Specification No. Rdso/Pe/ Spec/Tl/0195-2019 (Rev-0) Or Latest. As Per Pg. 23, S.No.9 Of Above Mentioned Rdso Specification. Accepted Make-Bender, Dold, Abb And Schneider Only.