Cover DIN EN IEC 61557-7 VDE 0413-7:2022-12

DIN EN IEC 61557-7 VDE 0413-7:2022-12

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

(IEC 61557-7:2019); German version EN IEC 61557-7:2022
Class/Status: Standard, valid
Released: 2022-12
VDE Art. No.: 0400569

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.