Output side ground fault overcurrent protection

What does E.GF mean?

This function stops the inverter output if a ground fault overcurrent flows due to a ground fault occurring in the inverter's output side (load side). This indicates an insulation breakdown in the motor or the cable connecting the inverter to the motor.

• Excessive current flowing to ground from the motor or inverter output.
• Damaged motor insulation leading to a ground fault.
• Short circuit between a power conductor and the unit's chassis.
• Faulty inverter power module allowing leakage current.

Click steps to track your progress.

1. 1

   Perform an insulation resistance test (megger test) between each motor output phase (U, V, W) and the motor frame ground.

2. 2

   Perform an insulation resistance test between each conductor of the connection cable and ground.

3. 3

   Visually inspect the motor and cable for any signs of physical damage or insulation breakdown.