BS-EN-61557-7 › Complete Document History
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

Complete Current Edition:
   2022/A1 EDITION - 2022 EDITION WITH AMENDMENT A1 INTERFILED - Oct. 1, 2023

Obsolete Revision Information:
   2007 EDITION - 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 - June 29, 2007
   1997 EDITION - PHASE SEQUENCE - July 15, 1997