Motor short-circuit

What does SCF mean?

A short-circuit or grounding fault has occurred at the drive output, or significant ground leakage current is detected (especially with multiple motors). This indicates a severe electrical fault in the motor or its cabling, risking immediate damage to the drive and motor.

Complete Troubleshooting Guide

1. 1

   Perform a thorough inspection and test of the cables connecting the drive to the motor for any short-circuits or damage.

2. 2

   Check the motor insulation resistance to ground and between phases using a megger; expect values >1 MΩ.

3. 3

   Reduce the switching frequency of the drive (if applicable and safe for the application) to mitigate leakage current.

4. 4

   Connect chokes in series with the motor if multiple motors are connected or ground leakage is persistent.