Earth leakage

What does 2330 mean?

The ACS880 drive tripped due to a detected earth fault or current unbalance in the motor or the motor cable. This indicates a significant leakage current to ground, posing a safety risk and potential equipment damage.

• Severe insulation failure in the motor power cable, resulting in a direct path to ground.
• Motor winding insulation breakdown, leading to a direct earth fault in the motor.
• Contamination or moisture ingress causing a low-resistance path to ground within the motor or cable system.
• Incorrect setting of parameter 31.20 Earth fault, where the drive is configured to trip on 'Fault' for this condition.

Click steps to track your progress.

1. 1

   Immediately de-energize and lock out the drive and associated machinery.

2. 2

   Visually inspect all motor power cables for any visible damage, cuts, or abrasion to the insulation.

3. 3

   Check motor and drive terminal connections for proper torque and the absence of foreign material, moisture, or dirt.

4. 4

   Measure insulation resistance between each motor phase and ground using a megger (e.g., 500VDC) to pinpoint the exact location of the earth fault (motor or cable).

5. 5

   If the fault is in the motor, consider motor repair or replacement. If in the cable, replace or repair the cable.

6. 6

   Verify parameter 31.20 Earth fault is configured correctly; if it was set to 'Fault', ensure the underlying issue is resolved before attempting a reset.