DIN IEC 61557-6:2005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 6: Residual Current Devices (Rcd) In Tt And Tn Systems
出版：Verband Deutscher Elektrotechniker
专家解读视频
