Sustained Mains Overvoltage

What does OUE mean?

The incoming mains voltage has been continuously above its specified limit for more than 5 seconds. This indicates a persistent problem with the power supply quality, which can stress the drive's input rectifier and DC-bus capacitors. Prolonged exposure to mains overvoltage can lead to premature failure of input stage components.

Complete Troubleshooting Guide

1. 1

   Immediately measure the incoming mains voltage to confirm it consistently exceeds the drive's nominal input voltage.

2. 2

   Contact the power utility company or an electrician to investigate and rectify the source of the sustained overvoltage on the mains supply.

3. 3

   Consider installing surge protection or a line reactor if the mains voltage fluctuations are persistent and cannot be otherwise resolved.