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EVS-EN IEC 61557-7:2022

Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence (IEC 61557-7:2019)

General information
Valid from 15.06.2022
Base Documents
IEC 61557-7:2019; EN IEC 61557-7:2022
Directives or regulations
None
Standard history
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This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other quantities. It does not apply to monitoring relays. NOTE Common worldwide three-phase distribution systems are depicted in IEC 610101.
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Newest version Valid from 15.06.2022