KS C IEC 60331-11:2019 Tests for electric cables under fire conditions — Circuit integrity — Part 11: Apparatus — Fire alone at a flame temperature of at least 750 ℃
2019KS C IEC 60331-11:2019 Tests for electric cables under fire conditions — Circuit integrity — Part 11: Apparatus — Fire alone at a flame temperature of at least 750 ℃
2003KS C IEC 60331-11:2003 Tests for electric cables under fire conditions-Circuit integrity-Part 11:Apparatus-Fire alone at a flame temperature of at least 750℃