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-Effectiveness of residual current devices (RCD) in TT, TN and IT systems
交流1000V及直流1500V以下低压配电系统的电气安全保护措施的测试、测量或监测设备
This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the effectiveness of protective measures of residual current devices (RCD) installed in TT, TN and IT systems.All current amendments available at time of purchase are included with the purchase of this document.