IEC 61557-7:1997

IEC 61557-7:1997

February 1997
International standard Cancelled

Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence

Specifies requirements for measuring equipment applied to testing th e phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.

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International IEC standards

Publication date

February 1997

Number of pages

15 p.

Reference

IEC 61557-7:1997

Print number

1
Sumary
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 7: Phase sequence

Specifies requirements for measuring equipment applied to testing th e phase sequence in three-phase distribution systems. Indication of the phase sequence may be mechanical, visual and/or audible.
Standard replaced by (1)
IEC 61557-7:2007
January 2007
International standard Cancelled
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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