Applicable Systems
AC500
AC590
ACS580
ACS880
Symptoms
Ground fault detected on drive output.
Possible Causes
- Motor winding short to ground
- Motor cable insulation breakdown
- Drive output ground leak
Troubleshooting Steps
- Step 1: Megger test motor windings to ground
Insulation > 1 MOhm - Step 2: Inspect motor cable insulation
No ground fault path - Step 3: Disconnect motor and power on drive
Fault clears without load
How to Reset
Reset via control panel after fixing ground fault.
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Source: ABB ACS510/550 User Manual, ABB Drives
Category: PLC & VFD
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