IEC 60947-3:2020/COR1:2021 ED4

Corrigendum 1 - Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units

Publication date:   Dec 16, 2021

General information

60.60 Standard published   Oct 22, 2021

IEC

TC 121/SC 121A Low-voltage switchgear and controlgear

International Standard

29.120.40   Switches | 29.130.20   Low voltage switchgear and controlgear

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БДС EN IEC 60947-3:2021/AC:2021-11:2021 :: EN

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Scope

IEC 60947-3:2020 applies to switches, disconnectors, switch-disconnectors and fuse-combination units and their dedicated accessories to be used in distribution circuits and motor circuits of which the rated voltage does not exceed 1 000 V AC or 1 500 V DC.
This fourth edition cancels and replaces the third edition published in 2008, Amendment 1:2012 and Amendment 2:2015. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:

addition of critical load current tests for DC switches (see 9.3.9);
addition of requirements for a conditional short-circuit rating for disconnectors, switches, and switch-disconnectors protected by circuit-breakers (see 9.3.7.2);
addition of new categories for high-efficiency motors switching (see Annex A);
addition of new Annex E for connection to aluminium conductors;
addition of new Annex F for power losses measurement.

Life cycle

PREVIOUSLY

Corrects
IEC 60947-3:2020 ED4

NOW

PUBLISHED
IEC 60947-3:2020/COR1:2021 ED4
60.60 Standard published
Oct 22, 2021