DIN EN 60255-5:2001 Electrical relays - Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests (IEC 60255-5:2000); German version EN 60255-5:2001
2014DIN EN 60255-27:2014 Measuring relays and protection equipment - Part 27: Product safety requirements (IEC 60255-27:2013); German version EN 60255-27:2014
2001DIN EN 60255-5:2001 Electrical relays - Part 5: Insulation coordination for measuring relays and protection equipment - Requirements and tests (IEC 60255-5:2000); German version EN 60255-5:2001