EN IEC 61557-6:2021 高达 1 000 V ac 和 1 500 V dc 的低压配电系统中的电气安全 保护措施的测试、测量或监控设备 第6部分:TT、TN 和 IT 系统中剩余电流装置(RCD)的有效性
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 6: Effectiveness of residual current devices (RCD) in TT, TN and IT systems