Regenerative overvoltage shut-off during acceleration

What does OV During Acc mean?

The inverter output is shut off due to regenerative overvoltage, meaning the internal main circuit DC voltage reached or exceeded a specified threshold during acceleration. This can occur if acceleration is too slow for the application, or due to external surge voltages on the power supply.

• Acceleration time is set too slow, allowing regenerative energy to build up excessively.
• Sudden deceleration or rapid changes in load during the acceleration phase (e.g. from an overhauling load).
• Surge voltages or instability detected in the power supply system.

Click steps to track your progress.

1. 1

   Decrease the acceleration time setting (e.g., Pr. 7 or Pr. 44) to reduce the potential for regenerative voltage build-up.

2. 2

   Check the incoming power supply for voltage stability and potential surge conditions.