Ramping up 3hp pump motor [RE-wrenches]

[Windy Dankoff, Dankoff Solar]

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>Hello Windy,
>You are correct. I called Franklin (mfg. of motor) and the tech said it
>was not a good idea to run single phase with VFD's. Causes clattering
>relays for starters.
>This is the largest pump that I have dealt with ....

Y'er on the cutting edge, far as I know.

My chart posted on our web site shows 1/2 to 2 HP. If you take the 2 
HP recommendations X 1.5 it should be a safe bet. If anything, motors 
tend to be a bit more efficient as they get bigger.

Reference:

http://www.dankoffsolar.com/reference/invertersizing.html

Windy

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