How can resolve problem 2330 Earth leakage Fault in ABB ACS880 Drive ?
Cause : Drive has detected load unbalance typically due to earth fault in motor or motor cable.
1. Check there are no power factor correction capacitors or surge absorbers in motor cable.
2. Check for an earth fault in motor or motor cables by measuring the insulation resistances of motor and motor cable.
3.Try running the motor in scalar control mode if allowed.(See parameter 99.04 Motor control mode.)
Check drive rectifier & IGBT using multimeter.
Check wiring.
Check drive hardware using multimeter.
Other Useful Link For ACS880 Drive
2330 Earth Leakage Fault in ABB ACS880 Drive indicates that the drive has detected a load imbalance, typically caused by an earth fault (ground fault) in the motor or motor cable. The drive monitors the current balance between the output phases and generates fault 2330 when excessive leakage current to ground is detected.
This fault should be investigated immediately, as continued operation may damage the motor, cables, or drive power components.
Possible Causes:
- Earth fault in the motor winding.
- Earth fault in the motor cable.
- Damaged motor insulation.
- Moisture inside the motor terminal box.
- Damaged or deteriorated motor cable insulation.
- Power factor correction capacitors installed between drive and motor.
- Surge absorbers connected to the motor cable.
- Faulty drive output IGBTs.
- Rectifier section fault.
- Incorrect wiring or damaged output connections.
- Internal drive hardware failure.
- Excessive leakage current caused by cable damage.
Solutions:
- Ensure that no power factor correction capacitors are connected between the drive and motor.
- Remove any surge absorbers installed on the motor cable.
- Measure the insulation resistance of the motor using a megger (insulation resistance tester).
- Measure the insulation resistance of the motor cable.
- Repair or replace the motor if insulation values are below acceptable limits.
- Replace damaged motor cables.
- Check for moisture, contamination, or water ingress in the motor terminal box.
- Inspect all motor and drive wiring connections.
- Verify correct cable termination and grounding.
- If permitted by the application, try operating the motor in Scalar Control Mode:
Parameter 99.04 – Motor Control Mode
- Check the drive rectifier section using a multimeter.
- Check the output IGBTs for short-circuit or leakage conditions.
- Inspect the drive hardware for damaged power components.
- If the fault persists after all external checks, perform a detailed hardware inspection or contact ABB service.
Additional Information
The 2330 Earth Leakage Fault is usually caused by insulation failure somewhere between the drive output and the motor. The most common sources are:
- Motor winding insulation breakdown.
- Damaged motor cables.
- Moisture ingress.
- Ground faults in the motor circuit.
In some cases, faulty IGBT modules or internal power section problems can also trigger the fault.
Recommended Troubleshooting Sequence
- Check motor cable insulation.
- Check motor winding insulation.
- Verify no capacitors or surge suppressors are connected to the motor cable.
- Inspect wiring and grounding.
- Run the motor in Scalar Control Mode (99.04) for testing if allowed.
- Check rectifier and IGBT modules using a multimeter.
- Inspect drive hardware for internal faults.
Following this sequence will identify the cause of most 2330 Earth Leakage Faults in ABB ACS880 drives.
