IEC 61557-9:2014/COR2:2017
小于等于1000 V交流電以及1500 V直流電低壓配電系統的電氣安全. 保護措施的測試, 測量或監測設備. 第9部分: IT系統絕緣故障定位設備. 擬議水平標準; 勘誤表2
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 9: Equipment for insulation fault location in IT systems - Proposed Horizontal Standard;