Motor/VFD Protection
Motor/VFD Protection
(OP)
Does a VFD provide both overcurrent and Oveload protection? The situation is that I have 125hp motor with a 200hp VFD. I do not want the upsteam breaker to be the limiting factor if it does not have to be... so I would like to size it for 200hp not 125hp. Is the motor still adequately protected?





RE: Motor/VFD Protection
RE: Motor/VFD Protection
RE: Motor/VFD Protection
But that said, because it becomes slightly more difficult to measure current accurately over an extreme range, you sometimes see restrictions in the MINIMUM size of motor that you can connect behind a VFD. In my experience it varies between no smaller than 70% of the drive rating, to no restriction at all. So you MUST check your installation manual because your motor is 62.5% of the drive rating and if you find the one that is limited to 70%, you can't do it. You are probably OK, but just check to be sure.
"Will work for salami"
RE: Motor/VFD Protection