DIN EN 60255-27:2006 Measuring relays and protection equipment - Part 27: Product safety requirements (IEC 60255-27:2005); German version EN 60255-27:2005
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
2006DIN EN 60255-27:2006 Measuring relays and protection equipment - Part 27: Product safety requirements (IEC 60255-27:2005); German version EN 60255-27:2005