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IEC 61557-7 Ed. 2.0 Edition 01/2007
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
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Abstract

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.

Status

Standard - Withdrawn

Origin

Technical Committee :
85 : Measuring equipment for electrical and electromagnetic quantities

Implementation

start of the vote on the project      date of ratification (dor)   
end of the vote on the project      date of anouncement (doa)   
start of the vote on the final project      date of publication (dop)   
end of the vote on the final project      date of withdrawal (dow)   


Publication Official Journal
of the Grand-Duchy of Luxembourg
Reference

Relations

Evolutions
IEC 60947-2 Ed. 4.2
IEC 60947-2 Ed. 4.2

International Classification for Standards (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

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