IEC 60947-8:2021 PRV 
Pre release version

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

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Abstract

This Final Draft International Standard is an up to 6 weeks' pre-release of the official publication. It is available for sale during its voting period: 2021-05-28 to 2021-07-09. By purchasing this FDIS now, you will automatically receive, in addition, the final publication.

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.

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Additional information

Publication typeInternational Standard
Publication date2021-05-28
Edition2.0
Available language(s)English
TC/SCTC 121/SC 121A - Low-voltage switchgear and controlgearrss
ICS29.130.20 - Low voltage switchgear and controlgear
Stability date  2024
Pages40
File size1391 KB

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