Fuji AF-300 Drive and Overvoltage Fault

[nhee2]

We have some small (<10 HP) water pumps fed by GE/Fuji drives.

We have historically had issues where - when supply power from utility cycles on/off quickly (i assume short enough that the pump is still coasting down when power is restored, the drives fault on OU2 - overvoltage during deceleration. Requires power down to reset the drive.

Are any of the VFD experts familiar with these drives and whether there is a parameter that should / can be adjusted to prevent this overvoltage fault?

 

[ptonsparky]

Install line reactors. It's a common issue with drives. At least the smaller ones.

 

[nhee2]

Install line reactors. It's a common issue with drives. At least the smaller ones.

was hoping maybe there was a magic setting in the drive to assist.....

 

[petersonra]

A lot of drives there's a parameter you can set that will allow at least some faults to be reset automatically.

 

[ptonsparky]

The power doesn't need to be lost for OV faults. Power Factor Correction switching will do it.
Extending your deceleration ramp time may help. Or set it to coast.

 

[Dzboyce]

I'm not familiar with the drives you're using. On the Yaskawa drives I use, I program a 60 to 120 second delay before restart after loss of power.