VLT FC 103 Refrigeration Drive
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Feb 23, 2024 11:38 am
Cause : Earth (ground) fault comes when there is current from the output phases to ground, either in the cable between the frequency converter and the motor or in the motor itself.
- Remove power to the frequency converter and repair the ground fault.
- Check for ground faults in the motor by measuring the resistance to ground of the motor leads and the motor with a megohmmeter.
- Perform current sensor test.