Standard

BS EN 61557-7:2022+A1:2023

Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC. Equipment for testing, measuring or monitoring of protective measures - Phase sequence

Current

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Published:

31 Oct 2023

1 Scope

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 three-phase distribution systems are depicted in IEC 61010‑1:2010, Annex I and IEC 61010‑1:2010/AMD1:2016, Annex I.

Product Details

Descriptors

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ICS Codes

17.220.20 Measurement of electrical and magnetic quantities

29.080.01 Electrical insulation in general

29.240.01 Power transmission and distribution networks in general

Committee

PEL/85

International relationships

Identical to:

EN 61557-7 Amd.1 Ed.3.0

IEC 61557-7 Amd.1 Ed.3.0

ISBN

978 0 539 17471 7

Publisher

BSI