MiamiCNC
Plastic
- Joined
- Dec 2, 2019
- Location
- Florida, USA
I've tried searching for the answers to these questions but can't find. Hoping the machining knowledge hive can answer for me. I have purchased a Mazak QTN20 lathe which I plan to power off a PhasePerfect PT030 30 HP phase converter. I figured 30 hp phase converter, 20 hp lathe, no problem. However, after reading the electrical tag, I am a little confused and have some questions (pic attached)
So the real question is: If I limit the spindle acceleration, will I be able to run this machine on my phase converter? What size breaker should I use?
Thanks
- Voltage 230/460 -- Is it safe to assume that the voltage range is +/-10%? Is it OK to use 240 volts, or do I need to step down?
- Spindle HP MAX 20/30. Does this mean 20 hp if using 230v and 30 hp if using 460v?
- Largest motor 139 amps? I am obviously misunderstanding something, but using the formula P=sqrt(3) x pf x I x V, assuming a power factor of 0.8 result in current being ~47 amps. 20hp = 15kw= 1.73 * 0.8 * 230v * 47amp. I don't understand 3 phase power too well. I am hoping that someone can please explain the huge discrepancy.
So the real question is: If I limit the spindle acceleration, will I be able to run this machine on my phase converter? What size breaker should I use?
Thanks