BS EN IEC 61557-7:2022
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Phase sequence

Standard No.

BS EN IEC 61557-7:2022

Release Date

2022

Published By

British Standards Institution (BSI)

Latest

BS EN IEC 61557-7:2022

Scope

1   Scope This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other quantities. It does not apply to monitoring relays. NOTE Common worldwide three-phase distribution systems are depicted in IEC 61010‑1.

BS EN IEC 61557-7:2022 Referenced Document

• IEC 61010-1:2010 Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 1: General requirements
• IEC 61010-2-030:2017 Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-030: Particular requirements for equipment having testing or measuring circuits

BS EN IEC 61557-7:2022 history

• 2022 BS EN IEC 61557-7:2022 Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1 500 V d.c. Equipment for testing, measuring or monitoring of protective measures. Phase sequence