Earth leakage

What does A2B3 mean?

The drive generates a warning when an earth fault or current unbalance is detected in the motor or motor cable. This indicates a potential insulation degradation or leakage current to ground, which requires investigation to prevent a full fault trip or safety hazard.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify proper grounding of the motor, the motor cable shield, and the drive system according to installation guidelines.

2. 4

   Review parameter 31.20 (Earth fault) settings to ensure the detection sensitivity is appropriate for the application.