轨道交通 地面装置 直流开关设备 第7-2部分:直流牵引供电系统专用测量、控制和保护装置 隔离电流变送器和其他电流测量设备
Railway applications—Fixed installations—DC switchgear—Part 7-2:Measurement、control and protection devices for specific use in d.c. traction systems—Isolating current transducers and other current measuring devices