DIN EN 60519-4:2007 Safety in electroheat installations - Part 4: Particular requirements for arc furnace installations (IEC 60519-4:2006); German version EN 60519-4:2006
2014DIN EN 60519-4:2014 Safety in electroheating installations - Part 4: Particular requirements for arc furnace installations (IEC 60519-4:2013); German version EN 60519-4:2013
2007DIN EN 60519-4:2007 Safety in electroheat installations - Part 4: Particular requirements for arc furnace installations (IEC 60519-4:2006); German version EN 60519-4:2006