IEC 61557-7:2007 ED2

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

Publication date:   Jan 29, 2007

General information

99.60 Withdrawal effective   Jul 26, 2019

WPUB   

IEC

TC 85 Measuring equipment for electrical and electromagnetic quantities

International Standard

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

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Revised

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Scope

This part of IEC 61557 specifies the requirements for measuring equipment applied to testing the phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible. This part of IEC 61557 does not apply to ancillary measuring equipment for other quantities, for example voltage testers comprising an additional phase sequence indicator. It does not apply to monitoring relays. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a minor revision.

Life cycle

PREVIOUSLY

Revises
IEC 61557-7:1997 ED1

NOW

WITHDRAWN
IEC 61557-7:2007 ED2
99.60 Withdrawal effective
Jul 26, 2019

REVISED BY

PUBLISHED
IEC 61557-7:2019 ED3