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IEC 61557-7 Ed. 1.0 b:1997
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IEC 61557-7 Ed. 1.0 b:1997 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
standard by International Electrotechnical Commission, 02/28/1997
Full Description
Specifies requirements for measuring equipment applied to testing th e phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.
M00007568
2021-02-22
New product
IEC 61557-7 Ed. 1.0 b:1997 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
standard by International Electrotechnical Commission, 02/28/1997