DIN EN 50123-7-1-2003 轨道交通.固定设备.直流开关设备.第7-1部分:直流牵引系统专用测量、控制与保护装置.应用指南
Railway applications - Fixed installations; D.C. switchgear - Part 7-1: Measurement, control and protection devices for specific use in d.c. tractions systems; Applications guide; German version EN 50123-7-1:2003