SR EN 61557-7:2007

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

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.

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General information

Status : Withdrawn
Approval date : 9/27/2007
Publish date : 9/29/2007
Withdrawal date : 4/6/2025
Number of pages : 12
ICS : 17.220.20 Measurements of electical and magnetic quantities,29.080.01 Electrical insulation in general,29.240.01 Power transmission and distribution network in general
Technical Committee : 166 - Measuring equipment for electrical and electromagnetic quantities

Relations with other standards:

Replaces SR EN 61557-7:2002
Normative reference SR EN 61557-1:2007
Replaced by SR EN IEC 61557-7:2022