ECN Forum Forums Code Related Discussion NEC & other Code issues Phase Convertor Sizing

MCA 74 on compressor unit (all mts taken into account).
240 v single phase to 240 v 3 phase.
40 hp convertor .
input Aprox 127 amps
outputaprox 100 amps.
Comments???
Yoopersup

I'm guessing you're looking at a rotary converter. Do the motors need to be de-rated? The math looks off between single phase input and 3 phase output.

Any chance of doing this with VFD's? Appropriately sized VFD's can convert a single phase input to three phase.

This is a Full HVAC unit was ordered wrong. MCA on name plate 74 amps single point hookup.
So need about 80 amps or so on three phase side.
As starteres ect are all ready in the package looking for 3 phase power imput. Vendor told us 40 hp unit well do the trick just checking.
Yoopersup