IS:4710-Specification for switches & switch -Isolators above 1000-V but not exceeding 11000 v
Indian Standard Institute
IS:4710-Specification for switches & switch -Isolators above 1000-V but not exceeding 11000 v - ISI 1968 - 41
IS:4710-Specification for switches & switch -Isolators above 1000-V but not exceeding 11000 v - ISI 1968 - 41