Electrical safty 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 9: Equipment for insulation fault location in IT systems
IDT IEC 61557-9:2009
全国电工仪器仪表标准化技术委员会(SAC/TC 104)
GB/T 18216的本部分规定了绝缘故障定位系统的要求，绝缘故障定位系统对不接地交流IT系统、电气上接有直流电路且标称电压不大于交流1 000 V的不接地交流IT系统、以及电压不大于直流1 500 V的不接地直流IT系统中的任何部分的绝缘故障进行定位，与测量原理无关。
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