IEC 60947-4-2 Ed. 4.0 b:2020

Current Revision
Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – Semiconductor motor controllers, starters and soft-starters

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Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – Semiconductor motor controllers, starters and soft-starters

PUBLISH DATE 2020
PAGES 234

Low-voltage switchgear and controlgear – Part 4-2: Contactors and motor-starters – Semiconductor motor controllers, starters and soft-starters

IEC 60947-4-2:2020 applies to semiconductor motor controllers, starters and soft-starters which can include a series mechanical switching device, intended to be connected to circuits the rated voltage of which does not exceed 1 000 V AC.

This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

  • scope exclusions;
  • editorial correction of notes and hanging paragraphs;
  • reference to IEC 62683-1;
  • safety aspects related to:
    • general aspects;
    • limited energy circuits;
    • electronic circuits;
  • mention of dedicated wiring accessories;
  • power consumption measurement;
  • alignment to IEC 60947-1:2020.
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