Earth leakage

What does AE02 mean?

The supply unit generates a warning when an earth fault or current unbalance is detected. This indicates a potential insulation issue within the supply unit's power circuit or its input cabling, requiring attention to prevent a full fault trip or damage.

• Insulation degradation or minor leakage in the input power cables (L1, L2, L3) supplying the drive's supply unit.
• Moisture or conductive dust ingress within the supply unit itself, causing current to leak to ground.
• Faulty input EMC filter components (e.g., Y-capacitors) developing a leakage path to ground.
• Improper grounding of the supply unit or upstream power distribution components, leading to an unbalanced current detection.
• Damage to the input rectifier bridge or DC-bus capacitors within the supply unit, creating a leakage path.

Click steps to track your progress.

1. 1

   1. Disconnect the input power cables (L1, L2, L3) from the supply unit. Perform an insulation resistance test (Megger, e.g., 500VDC) on these cables to ground (PE).

2. 2

   2. Visually inspect the interior of the supply unit for signs of moisture, contamination, or carbon tracking, especially around the input terminals.

3. 3

   3. Verify that the PE (ground) connection to the supply unit's terminal block is tight and makes good contact.

4. 4

   4. If accessible and safe, measure the resistance of the input EMC filter components to ground for any unexpected low values.

5. 5

   5. Power cycle the entire system after ensuring all connections are secure and the environment inside the cabinet is clean and dry.