EN 50123-7-3-2003 轨道交通.固定装置.直流开关设备.第7-3部分:直流牵引系统专用测量,控制和保护设备.绝缘电压传感器和其他电压测量设备
Railway applications Fixed installations D.C. switchgear Part 7-3: Measurement, control and protection devices for specific use in d.c. traction systems Isolating voltage transducers and other voltage measuring devices