BS EN 61557-7:2007
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 - Phase sequence

Standard No.

BS EN 61557-7:2007

Release Date

2007

Published By

British Standards Institution (BSI)

Status

Be replaced

Replace By

BS EN 61557-7:2022+A1:2023

Latest

BS EN 61557-7:2022+A1:2023

Replace

04/30125204 DC-2004 BS EN 61557-7:1997

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. NOTE Phase lamps are not considered to be voltage testers.

BS EN 61557-7:2007 Referenced Document

• IEC 60417 
• IEC 61557-1 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC - Equipment for testing, measuring or monitoring of protective measures - Part 1: General requirements*， 2019-07-26 Update

BS EN 61557-7:2007 history

• 2023 BS EN 61557-7:2022+A1:2023 Electrical safety in low voltage distribution systems up to 1 000 V AC and 1 500 V DC. Equipment for testing, measuring or monitoring of protective measures. Phase sequence
• 2007 BS EN 61557-7:2007 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 - Phase sequence