Karl Townsend wrote:
Kind of a follow up to my pump RPM question.

I found a 1200 RPM 5 hp motor and an old Hitachi SJ200 5hp. vfd in the spare
stockroom (er junkpile)

Any reason I can't spin this combo at 3600 RPM? Still have 5 horse?

You need to call the motor manufacturer and
ask them. I'm pretty sure the answer will
be no. I think 20% over nameplate would be
fine, but 100% is probably pushing it too far.