DC Bus Overvoltage

What does OV mean?

The DC bus voltage exceeded its trip point (≥400Vdc for 208-240Vac Drives; ≥800Vdc for 480Vac Drives). This is often caused by high input voltage, overly short deceleration times leading to regenerative energy, or the presence of power factor correction capacitors on the input. Overvoltage can severely damage drive components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Remove any power factor correction capacitors connected to the input of the Drive, as they can cause voltage spikes.