DIN EN 60255-27 Berichtigung 1:2012
Measuring relays and protection equipment - Part 27: Product safety requirements (IEC 60255-27:2005); German version EN 60255-27:2005, Corrigendum to DIN EN 60255-27 (VDE 0435-327):2006-08; (IEC-Cor. :2007 to IEC 60255-27:2005)