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What can cause a PHF with ATS46D17 to D38's soft starts?

Issue:
What can cause a PHF with ATS46D17 to D38's soft starts?
 
Product Line:
ATS48
 
Environment:
ATS46D22N
ATS46D32N
ATS46D38N

Cause:
n/a
 
Resolution:

With ATS46D17 to D38N, it is  not possible to bypass without PHF fault, these ranges don't controlled the current after the bypass.  It means that it's not possible to make controlled stop and motor protection with the starter in this configuration.

The reason why, on page 64 (User's manual) there is an auxiliary NC contact of the bypass contactor (KM3) on the common control supply terminal (C).
This contact switch off the starter control supply during the bypass operation.
It 's a hard method to reset the PHF fault before the next start (ARS automatic reset parameter must be "ON").

If a PHF still locks the starter :
- ARS is OFF
- the KM3 contact has been forgotten or it's sequence is not correct.
-The motor current is under 10% of the starter nominal.
 

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