NF C42-198-8*NF EN 61557-8:2015 不超过1000V交流电和1500V直流电的低压配电系统中的电气安全性 防护测量用测试、测量或监测设备 第8部分:IT系统用绝缘监测装置
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 8 : insulation monitoring devices for IT systems