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IEC 60947-4-3 Ed. 3.0 en:2020

Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads
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IEC 60947-4-3 Ed. 3.0 en:2020

Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads

PUBLISH DATE 2020
PAGES 92
IEC 60947-4-3 Ed. 3.0 en:2020

Low-voltage switchgear and controlgear - Part 4-3: Contactors and motor-starters - Semiconductor controllers and semiconductor contactors for non-motor loads

IEC 60947-4-3:2020(E) applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC.

It covers their use:

  • for operations of changing the state of AC electric circuits between the ON-state and the OFF-state;
  • with or without bypass switching devices;
  • as controller, for reducing the amplitude of the RMS AC voltage.

This third edition cancels and replaces the second edition published in 2014. This edition constitutes a technical revision.

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

  • a) scope exclusions;
  • b) editorial correction of notes and hanging paragraphs;
  • c) safety aspects related to:
    • general aspects;
    • limited energy circuits;
    • electronic circuits;
  • d) mention of dedicated wiring accessories;
  • e) power consumption measurement;
  • f) alignment to IEC 60947-1:2020;
  • g) alignment with IEC 60947-4-2 when appropriate.
SDO IEC: International Electrotechnical Commission
Document Number IEC 60947
Publication Date July 1, 2020
Language en - English
Page Count
Revision Level 3.0
Supercedes
Committee 121A
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