Technical FAQs

Ask a Question

What causes a mains overvoltage fault (OSF) on the ATV320 drive?

Issue:
What causes a mains overvoltage fault (OSF) on the ATV320 drive?

Product Line:
Altivar 320

Environment:
All

Cause:
N/A

Resolution:
A mains overvoltage fault can be caused by a number of reasons.  
One issue can be caused by power quality issues in the line supply side of the drive.
Spikes or poor power quality can over charge the drives DC bus (PA and PC).  
These can be hard to pinpoint as the spikes will not be detected by your standard fluke voltage meter.

Another cause is a standard high voltage potential on the drive line terminals L1, L2, and L3.  
Measure voltage phase to phase to confirm that the voltage supplied does not surpass the drive's rating.
Was this helpful?
What can we do to improve the information ?