DIN EN 50123-5/A1:1999 Railway applications - Fixed installations; D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems; Amendment A1; German version EN 50123-5:1997/A1:1999
2012DIN EN 50526-1:2012 Railway applications - Fixed installations - D.C. surge arresters and voltage limiting devices - Part 1: Surge arresters; German version EN 50526-1:2012
2003DIN EN 50123-5:2003 Railway applications - Fixed installations; D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in d.c. systems; German version EN 50123-5:2003
1998DIN EN 50123-5:1998 Railway applications - Fixed installations - D.C. switchgear - Part 5: Surge arresters and low-voltage limiters for specific use in D.C. systems; German version EN 50123-5:1997