Electrical safety in low voltage distribution systems up to 1 kV a.c. and 1,5 kV d.c. - Equipment for testing, measuring or monitoring of protective measures -- Part 9: Equipment for insulation fault location in IT systems.
交流1 kV和直流1.5 kV以下低压配电系统的电气安全保护措施的试验、测量或监测设备第9部分:IT系统绝缘故障定位设备