DIN IEC 61557-9 (2007-08)被替代
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
出版：German Institute for Standardisation (Deutsches Institut für Normung)
專家解讀視頻
