Inverter Output Fault / Earth Fault

¿Qué significa E.10 ?

The inverter has detected an output current fault, specifically an earth (ground) fault, on its output side (affecting the motor or connection cable). This indicates a breakdown in insulation, leading to current leakage to ground. An earth fault is a significant safety hazard and can cause severe damage to the motor or inverter if unresolved.

• Deterioration or mechanical damage to motor cable insulation, leading to direct contact with conduit or ground.
• Moisture ingress or contamination within the motor winding, causing a phase-to-ground short circuit.
• Insulation breakdown in the motor terminal box due to loose connections or foreign conductive material.
• Damage to the inverter's output filter (if present) causing leakage current to ground.

Haga clic en los pasos para seguir su progreso.

1. 1

   Power down the inverter and disconnect all motor phases (U, V, W) from the inverter output terminals.

2. 2

   Using a megohmmeter (insulation resistance tester) at 500VDC, measure insulation resistance between each motor phase (U, V, W) and motor frame ground. Verify readings are above 1 MOhm.

3. 3

   Measure insulation resistance of the motor cable between each conductor and the cable shield/ground terminal. Verify readings are above 1 MOhm.

4. 4

   Inspect the motor terminal box for moisture, carbon tracking, or loose connections.

5. 5

   Re-connect only the motor cable to the inverter, leaving the motor disconnected, and run the inverter without a motor (if allowed by model) to isolate the fault to the cable or motor.