IEC 61557-7:1997
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
12-09-2022
English - French, Spanish, Castilian
28-02-1997
Specifies requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems. Indication ofthe phase sequence may be mechanical, visual and/or audible.
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