rsdoran
Lifetime Supporting Member
Personally have no idea what y'all are saying.
The rule of thumb (theory etc) says a 60HP motor at 440-480 will be 1.5 amps per HP, that means it will be slightly higher at 415v, say 80 amps. I have no idea why that factor was divided by 2.
I do not see a specific reason to STAR start/Delta Run a 60hp motor overall, if it will run continuous for several hours at least.
If it is a cost evaluation I would not consider a star/delta or a softstart, just get a VFD, the ROI will be equvalent in most cases.
The rule of thumb (theory etc) says a 60HP motor at 440-480 will be 1.5 amps per HP, that means it will be slightly higher at 415v, say 80 amps. I have no idea why that factor was divided by 2.
I do not see a specific reason to STAR start/Delta Run a 60hp motor overall, if it will run continuous for several hours at least.
If it is a cost evaluation I would not consider a star/delta or a softstart, just get a VFD, the ROI will be equvalent in most cases.