Overload on VFD

[ceencee]

Im trying to get my 5hp colombo spindles to run off a 7.5 hp Delta VFD055A23B. Im not having much luck and i may have cooked one. I believe i have it set properly, but instead of drawing the 12 Amps the spindle is rated for , its drawing 40!! The motor heats up and the overload trips on the VFD.
The spindle is rated at 230 volt 3 phase, so im not sure what im missing. Its not a dual voltage spindle, at least i dont think it is but if any one has some answers for me to try, im all ears....i really dont want to cook my spindles!!

Thanks
Wade

[mike_Kilroy]

ok I'll shoot......

if ur motor WERE dual volt and you tried running it as 460v winding on 230v vfd, it would pull low current so not likely this (and u said it is not a dual volt motor anyway).

sounds like you got it set for VECTOR MODE instead of v/hz? can u chech parameter for that & make sure it is not in sensorless vector mode? dont go to it until you get good v/hz mode first.

only other thing it could be is if you have v/hz curve set way off. so for more help, post all the data on your motor nameplate so folks can see if they see a mismatch?