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 3:Loop impedance
IDT IEC 61557-3:2007
全国电工仪器仪表标准化技术委员会(SAC/TC 104)
GB/T 18216的本部分规定了通过对被测电路加载产生电压降落的方法来测量环路阻抗的设备的要求，环路阻抗是相导体与防护导体之间或相导体与中性导线之间或某两相导体之间的阻抗。
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