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What are the probable causes & remedy of SCF (Motor Short Circuit) fault in Altivar 312 drive.

Probable Cause:
  • Short-circuit or grounding at the drive output
  • Significant ground leakage current at the drive output if several motors are connected in parallel 
  • Check the cables connecting the drive to the motor and the motor insulation.
  • Reduce the switching frequency
  • Connect chokes in series with the motor
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