Overvoltage Due to High Mains Voltage

What does Overvolt mean?

This fault indicates that the incoming mains supply voltage has risen above the VSD's maximum permissible operating threshold, specifically due to high main voltage. This can be caused by unstable grid conditions, incorrect supply transformer tap settings, or other electrical disturbances. Sustained overvoltage can lead to damage to the VSD's input rectifier and DC link capacitors, potentially causing drive failure and unsafe conditions.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Investigate for voltage spikes or transients on the mains supply that could briefly exceed the limit.

2. 4

   Ensure other loads on the same mains supply are not causing significant voltage fluctuations.