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What are the probable causes of StF fault on ATS48 soft starter.

StF Detection is active during the motor starting phase (acceleration phase). The ATS48 will trigger an STF fault if: the starting time > TLS.  

•    Parameter setting In lower than the nominal motor current indicated on the rating plate. 
•    TLS parameter setting too low. 
•    ILT parameter setting (limiting current) too low.
•    Parameters configured incorrectly (ILT, TLI, tq0, LSC parameters). 
•    ATS48 undersized.  
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