BS EN 61557-8-2015 低于1000 V交流和1500 V直流低压配电系统的电气安全性.保护措施的测试、测量或监视设备.IT系统绝缘监视装置
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. Insulation monitoring devices for IT systems