IEC 61439-1:2020 ED3

Low-voltage switchgear and controlgear assemblies - Part 1: General rules

Publication date:   May 5, 2020

General information

60.60 Standard published   May 5, 2020

IEC

TC 121/SC 121B Low-voltage switchgear and controlgear assemblies

International Standard

29.130.20   Low voltage switchgear and controlgear

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IEC 61439-1:2020 is available as IEC 61439-1:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61439-1:2020 lays down the general definitions and service conditions, construction requirements, technical characteristics and verification requirements for low-voltage switchgear and controlgear assemblies. NOTE Throughout this document, the term assembly(s) (see 3.1.1) is used for a low-voltage switchgear and controlgear assembly(s). For the purpose of determining assembly conformity, the requirements of the relevant part of the IEC 61439 series, Part 2 onwards, apply together with the cited requirements of this document. For assemblies not covered by Part 3 onward, Part 2 applies. This third edition cancels and replaces the second edition published in 2011. It constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) clarification that power electric converter systems, switch mode power supplies, uninterruptable power supplies and adjustable speed power drive systems are tested to their particular products standard, but when they are incorporated in assemblies the incorporation is in accordance with the IEC 61439 series of standards;
b) introduction of a group rated current for circuits within a loaded assembly and the refocusing of temperature-rise verification on this new characteristic;
c) addition of requirements in respect of DC;
d) introduction of the concept of class I and class II assemblies regarding protection against electric shock.
The contents of the corrigendum of December 2021 have been included in this copy.

Life cycle

PREVIOUSLY

Revises
IEC 61439-1:2011 ED2

NOW

PUBLISHED
IEC 61439-1:2020 ED3
60.60 Standard published
May 5, 2020

CORRIGENDA / AMENDMENTS

Corrected by
IEC 61439-1:2020/COR1:2021 ED3