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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

Status
Date
Type
Name
15.12.2023
Amendment
15.12.2023
Main + amendment
15.06.2022
Main
04.05.2007
Main
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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