SN EN 61557-7-1997
SN EN 61557-7-1997 标准详情
- 标准号：SN EN 61557-7-1997
- 中文标题：
- 英文标题：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
- 标准类别：瑞士标准化协会SNV
- 发布日期：
内容简介
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 equ
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