• IEC 61557-7:2019 RLV

    Current The latest, up-to-date edition.

    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

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English

    Published date:  26-07-2019

    Publisher:  International Electrotechnical Committee

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    IEC 61557-7:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

    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.

    General Product Information - (Show below) - (Hide below)

    Committee TC 85
    Document Type Redline
    Publisher International Electrotechnical Committee
    Status Current
    Supersedes
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