I.S. EN IEC 61557-7:2022
Current
The latest, up-to-date edition.
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)
Hardcopy , PDF
English
06-07-2022
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
FOREWORD
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
5 Marking and operating instructions
6 Tests
Annex A (normative) Illustrations for mechanical tests
Annex B (informative) Phase sequence test
Bibliography
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