DIN V ENV 50152-3-1-1999 轨道交通.固定设备.交流开关设备特殊要求.第3部分:交流牵引设备专用测量、控制和保护装置.第1节:使用指南
Railway applications - Fixed installations - Particular requirements for a.c. switchgear - Part 3: Measurement, control and protection devices for specific use in a.c. traction systems; Section 1: Application guide; German version ENV 50152-3-1:1998