DIN EN 50123-3/A1-2014 轨道交通.固定装置.直流开关装置.第3部分:室内直流隔离器、隔离开关和接地开关.德文版本EN 50123-3-2003/A1-2013
Railway applications - Fixed installations - D.C. switchgear - Part 3: Indoor d.c. disconnectors, switch-disconnectors and earthing switches; German version EN 50123-3:2003/A1:2013