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IEC 60947-3 Ed. 4.1 en:2025

Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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IEC 60947-3 Ed. 4.1 en:2025

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

IEC 60947-3 Ed. 4.1 en:2025

IEC 60947-3:2020+AMD1:2025 CSV 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.

The contents of the corrigendum of October 2021 have been included in this copy.

SDO IEC: International Electrotechnical Commission
Document Number IEC 60947
Publication Date Not Available
Language en - English
Page Count 220
Revision Level 4.1
Supercedes
Committee 121A
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