Ask a Question

What are possible causes for the ATS48 soft start to trip the breaker.

ATS48 tripping the breaker.

Product Line:
ATS48, Altistart 48

All models and serial numbers

Possible causes:
1.  The load is excessive
2.   Shorted SCR
3.  Shorting contactor is welded in the closed position

If excessive load, may need to upsize the motor and soft start.  Try increasing the acceleration time.  Decrease the load.
With the soIf start powered down, perform static checks on the SCR's. If shorted SCR's, repair or replace.
If shorting contactor is welded, replace the shorting contactor.
Was this helpful?
What can we do to improve the information ?