DIN EN 61557-7 (2008-02)现行
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：German Institute for Standardisation (Deutsches Institut für Normung)
专家解读视频
Defines the requirements for measurement of equipment applied to testing the phase sequence in three-phase distribution systems. The phase sequence may be indicated by mechanical, visual and/or audible means. Not applicable to ancillary measuring equipment for other quantities, such as voltage testers consisting of an additional phase sequence indicator. Not applicable to monitoring relays.
Supersedes DIN EN 50197-7. (12/2001) Supersedes DIN IEC 61557-7. Applies in conjunction with DIN EN 61557-1 issue 12-2007. (02/2008)
VDE 0413-7:2008 - Identical
UNE EN 61557-7:2007 - Identical
SS EN 61557-7 Ed. 2 (2007) - Identical
I.S. EN 61557-7:2007 - Identical
NF EN 61557-7:2007 - Identical
NBN EN 61557-7:2007 - Identical
IEC 61557-7 Ed. 2.0 - Identical
BS EN 61557-7:2007 - Identical
SN EN 61557-7:1997 - Identical
