RO
Links
Advanced Search
+40 21 3167723
Total 0€
View cart

SR EN IEC 61557-7:2022

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

<!-- NEW! -->IEC 61557-7:2019 is available as <a href="https://webstore.iec.ch/publication/65556">IEC 61557-7:2019 RLV</a> which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.</br></br>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 e

39.99 €
Add to cart

Status : Valid
Approval date : 6/30/2022
Number of pages : 18
ICS : 17.220.20 Measurements of electical and magnetic quantities,29.080.01 Electrical insulation in general,29.240.01 Power transmission and distribution network in general
Technical Committee : 166 - Measuring equipment for electrical and electromagnetic quantities

Relations with other standards: