Cover IEC 60947-8:2021

IEC 60947-8:2021

Low-voltage switchgear and controlgear - Part 8: Control units for built-in thermal protection (PTC) for rotating electrical machines

Ausgabedatum: 2021-07
Edition: 2.0
Sprache: EN-FR - zweisprachig englisch/französisch
Seitenzahl: 82 VDE-Artnr.: 250160


IEC 60947-8:2021 specifies requirements for control units, which control a switching device in response to the PTC thermistors incorporated in rotating electrical machines and the industrial application.
This second edition cancels and replaces the first edition published in 2003, Amendment 1:2006 and Amendment 2:2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:

  1. safety aspects related to:
  • general aspects;
  • limited energy circuits;
  • electronic circuits;
  1. alignment to IEC 60947-1:2020;
  2. wire break detection function;
  3. the term detector is replaced by thermistor;
  4. reference to IEC 60738-1-4.