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IEC 60947-4-1 Ed. 5.0 b:2023

Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters
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IEC 60947-4-1 Ed. 5.0 b:2023

Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

PUBLISH DATE 2023
PAGES 78
IEC 60947-4-1 Ed. 5.0 b:2023

Low-voltage switchgear and controlgear - Part 4-1: Contactors and motor-starters - Electromechanical contactors and motor-starters

IEC 60947-4-1:2023 is applicable to the following equipment:

  • electromechanical contactors and starters including motor protective switching devices (MPSD and IMPSD);
  • actuators of contactor relays;
  • contacts dedicated exclusively to the coil circuit of the contactor or the contactor relay;
  • dedicated accessories (e.g. dedicated wiring, dedicated latch accessory);

These are intended to be connected to distribution circuits, motors circuits and other load circuits, the rated voltage of which does not exceed 1 000 V AC or 1 500 V DC.

This fifth edition cancels and replaces the fourth edition published in 2018. This edition constitutes a technical revision.

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

  • a) objective in the scope;
  • b) instantaneous only motor protective switching device IMPSD (3.5.33);
  • c) kinds of equipment (5.2.1);
  • d) methods of overload protection of motors (5.2.6);
  • e) adoption of the AC-7d from IEC 61095:2023 (in 5.4.2);
  • f) separately mounted overload relay of a starter (in 5.7.3 b));
  • g) starter and contactor suitable for use downstream to basic drive module (6.1.2 w));
  • h) reference to IEC TS 63058 for environmental aspects (in 6.4);
  • i) wiring subject to movement (in 8.1.3);
  • j) use of voltage transient limiting device (8.1.18);
  • k) accessible parts subject to temperature limits (in 8.2.2.3);
  • l) reference to Annex X of IEC 60947-1:2020 for the co-ordination of MPSD with SCPD (8.2.5.4);
  • m) reference to IEC TR 63216 with different EMC environments (8.3.1);
  • n) reference to IEC TR 63201 for the embedded software design (8.4);
  • o) reference to IEC TS 63208 for cybersecurity aspects (8.5);
  • p) update and completion of the measurement method of the power consumption of the electromagnet (9.3.3.2.1.2);
  • q) update of Annex C including rational about AC-3e;
  • r) determination of the critical load current for photovoltaic applications (M.8.7).
SDO IEC: International Electrotechnical Commission
Document Number IEC 60947
Publication Date Nov. 1, 2023
Language b - English & French
Page Count
Revision Level 5.0
Supercedes
Committee 121A
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