Please review my rotary phase converter settings.

​Hi Guys,

I am just about done with my 15 HP 40 Amp idler motor converter using this plan.

https://www.practicalmachinist.com/FitchWConverter.pdf

This is the second one I have built but it is much bigger. This one is a bit different as I am looking to run a 50 Amp Lincoln inverter welder so the balance should be more important. I have had some friends measure the 3 phase legs at work and they seem to be all over the place so maybe not…??

The capacitors are on all 3 legs. About an hour's worth of switching them around. I do have 3 volt/amp meters like this that helped.

Panel Meter, 500V & 99.9A AC Red LED | MPJA.COM


Line in (no load)

L1 & L2 = 240VAC

Idler motor is running.

Line out (no load)

T1 & T2 = 240Vac 10.4Amps
T1 & T3 = 240Vac 10.5Amps
T2 & T3 = 250Vac 19.9Amps


Line out (with 1HP band saw running)

T1 & T2 = 239Vac 11.6Amps
T1 & T3 = 236Vac 10.9Amps
T2 & T3 = 244Vac 17.2Amps


Do the voltages look ok?

I am not sure what I should balance the Amps to be?

What size fuses should the motor have on the three lines?


Thanks….Larry