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Are the ATS48 and ATS22 softstarters rated for a category 4 circuit?

Published date: 29 June 2020

Issue:
Is it possible to use ATS42/22 with a category 4 circuit?

Product Line:
ATS22 and ATS48

Environment:
All serial numbers for ATS22 and ATS48

Cause:
N/A

Resolution:
We do not have any safety features implemented in ATS22/48, no any safety validated scheme, certificate etc.
However, one can use a  typical category 4 safety scheme where the ATSxx is connected just before the motor:
See attachment

Safety is based on safety elements (relays, contactors, safety PLC...) and the ATSxx operates like a motor.
ATSxx does store any energy (no capacitors) so safety contactors are doing safety cut-off the ATSxx+motor.


 


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