Ground Fault

What does EF2 mean?

This fault signals a ground fault in the motor or the motor cables, indicating an insulation breakdown or improper grounding in the output circuit of the Altivar 212 drive.

• Ground fault in the motor windings.
• Ground fault in the motor cables.

Click steps to track your progress.

1. 1

   Measure insulation resistance between motor phases and ground using a megger.

2. 2

   Measure insulation resistance between motor cables and ground using a megger.

3. 3

   Inspect motor and motor cables for physical damage or wear causing a ground path.