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IEC 60947-8:2021

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

General information
Valid from 28.07.2021
Directives or regulations
None
Standard history
Status
Date
Type
Name
28.07.2021
Main
18.10.2011
Main
18.05.2011
Amendment
24.11.2006
Main
25.09.2006
Amendment
27.05.2003
Main
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.
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