SS EN 61557-7 Ed. 2 (2007)现行
Electrical Safety In Low-voltage, Distribution Systems Up To 1 Kv A.c. And 1,5 Kv D.c. - Equipment For Testing, Measuring Or Monitoring Of Protective Measures - Part 7: Phase Sequence
出版：Standardiserings-Kommissionen I Sverige
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.
1998 Edition is still active. (08/2007)
NF EN 61557-7:2007 - Identical
NBN EN 61557-7:2007 - Identical
IEC 61557-7 Ed. 2.0 - Identical
DIN EN 61557-7 (1998-05) - Identical
BS EN 61557-7:2007 - Identical
SN EN 61557-7:1997 - Identical
DIN EN 61557-7 (2008-02) - Identical
DIN EN 61557-7:2008 - Identical
I.S. EN 61557-7:2007 - Identical
UNE EN 61557-7:2007 - Identical
