I am having some issue with two vfds installed at the same location. They are tripping out on overvoltage faults very randomly. I checked the incoming voltage, and at 245, it is pretty high, but not high enough to get the utility company to look at it.
The one drive is running a bandsaw. We have plenty of decel time programmed in. It seems it faults out when the the load changes very rapidly. Like it tends to trip out, right when they hit a knot in the log etc. It is a bit puzzling to me why rapid fluctuation on the load would create an overvoltage condition. The only thing I can think of is if the motor is somehow creating a regen when the load suddenly lessens. But I wasn't sure what to change in the programming to get around it.
I would appreciate any thoughts you would have on this.
The one drive is running a bandsaw. We have plenty of decel time programmed in. It seems it faults out when the the load changes very rapidly. Like it tends to trip out, right when they hit a knot in the log etc. It is a bit puzzling to me why rapid fluctuation on the load would create an overvoltage condition. The only thing I can think of is if the motor is somehow creating a regen when the load suddenly lessens. But I wasn't sure what to change in the programming to get around it.
I would appreciate any thoughts you would have on this.