Applicable Systems
Modicon M221
Modicon M241
Modicon M251
Modicon M340
Modicon M580
Altivar
Symptoms
Ground fault: motor current leakage to ground.
Possible Causes
- Motor winding short to ground
- Motor cable insulation breakdown
- Drive output ground leak
Troubleshooting Steps
- Step 1: Megger test motor to ground
Insulation > 1 MOhm - Step 2: Inspect motor cable
No ground fault path - Step 3: Disconnect motor and test
Fault clears without load
How to Reset
Reset via control panel after fixing ground fault.
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Source: Schneider Electric ATV320 Programming Manual
Category: PLC & VFD
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