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IEC 61557-7:2019+AMD1:2023 CSV
IEC 61557-7
IEC 61557-7:2019
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 7: Phase sequence
IEC 61557-7:2019 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. IEC 61557-7:2019 cancels and replaces the second edition published in 2007. This edition constitutes a technical revision. This edition includes the following changes with respect to the previous edition:
a) alignment of the structure with that of the whole IEC 61557 series;
b) updated requirements in 4.3 in accordance with new editions of IEC 61010-1 and IEC 61010-031;
c) the information on markings was extended;
d) the information on the operating instructions was extended;
e) complement to the information on the testing of leads;
f) test leads for insulated conductors were introduced;
g) Annex B was added with information on phase sequence tests and indications.
a) alignment of the structure with that of the whole IEC 61557 series;
b) updated requirements in 4.3 in accordance with new editions of IEC 61010-1 and IEC 61010-031;
c) the information on markings was extended;
d) the information on the operating instructions was extended;
e) complement to the information on the testing of leads;
f) test leads for insulated conductors were introduced;
g) Annex B was added with information on phase sequence tests and indications.
CHFÂ 80.-
Consolidated version
The content of amendment(s) is incorporated into the publication. The track changes mode shows where the publication has been modified by the amendment.
DiscoverTechnical committee
TC 85 Measuring equipment for electrical and electromagnetic quantitiesCategory
Safety| Publication type | International Standard |
| Publication date | 2019-07-26 |
| Edition | 3.0 |
| ICS | 17.220.20 29.080.01 29.240.01 |
| Stability date | 2028 |
| ISBN number | 9782832271612 |
| Pages | 28 |
| File size | 1.23 MB |
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