EN 61557-8:2015 高达 1 000 V ac 和 1 500 V dc 的低压配电系统的电气安全 保护措施的测试、测量或监控设备 第8部分：IT 系统的绝缘监控设备
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
IEC 61557-8:2014 specifies the requirements for insulation monitoring devices (IMD) which permanently monitor the insulation resistance RF to earth of unearthed a.c. IT systems, of...