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
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:
- safety aspects related to:
- general aspects;
- limited energy circuits;
- electronic circuits;
- alignment to IEC 60947-1:2020;
- wire break detection function;
- the term detector is replaced by thermistor;
- reference to IEC 60738-1-4.
|Publication type||International Standard|
|TC/SC||TC 121/SC 121A - Low-voltage switchgear and controlgearrss|
|ICS||29.130.20 - Low voltage switchgear and controlgear|
|File size||1391 KB|
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