
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 7: Phase Sequence
出版:Nederlands Normalisatie Instituut

專家解讀視頻
Defines the requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems.
IEC 61557-7 Ed. 2.0 - Identical