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IEC 60947-3 Ed. 4.0 b:2020

Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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IEC 60947-3 Ed. 4.0 b:2020

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

PUBLISH DATE 2020
PAGES 194
IEC 60947-3 Ed. 4.0 b:2020
Low-voltage switchgear and controlgear - Part 3: Switches, disconnectors, switch-disconnectors and fuse-combination units
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.
SDO IEC: International Electrotechnical Commission
Document Number IEC 60947
Publication Date April 1, 2020
Language b - English & French
Page Count 194
Revision Level 4.0
Supercedes
Committee 121A
Publish Date Document Id Type View
Not Available IEC 60947-3 Ed. 4.1 en:2025 Revision
April 1, 2020 Revision
April 1, 2020 IEC 60947-3 Ed. 4.0 b:2020 Revision