IEC 61557-7:2007

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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

Published By	Publication Date	Number of Pages
IEC	2007-01-29	20

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Categories: 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, IEC

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Description

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.

Additional information

Published Code	IEC
Published By	International Electrotechnical Commission
Publication Date	2007-01-29
Pages Count	20
Language	France
Edition	2.0
File Size	143.4 KB
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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IEC 61557-7:2007

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