VFD...120-230 or 230-230?????

[rbertalotto]

I want to convert my small milling machine to 1.5HP 3PHASE with a VFD. I see there are 120V single phase to 230V three phase, and 230V single phase to 230V three phase

I have both 120 and 230V in the shop......Is there an advantage of one VFD input voltage over the other......???

Thanks!

 

[mksj]

Go with 230 to 230, as the line amperage draw will be 1/2 that of 120 VAC. Smaller gauge wire/breaker needed for the input at 230VAC and 2Hp 230 VFD will be far more common and less expensive than a 120 to 230VAC version (excludes the generic Chinese VFD's).

 

[Eddyde]

I second that. Go with the higher voltage VFD, less current draw, less issues.

 

[rbertalotto]

That is what I though......Higher Voltage = Less current.

Thanks a million!