CNCzone Network: RFQwork :: 3Dstuffzone :: Welderzone
220 to 440 transformer conversion
I need to power a 5.5 KVA 440 volt Lathe on 3 phase.(not CNC)
The motor is dedicated delta 440, and cannot be replaced/reconfigured.
I want to take a 11 KVA (440 to 220) single phase power transformer and
reverse feed it to get 440 single phase output.
I think this will give me about 9 KVA derated.
Then I will feed a 7.5 KVA 440 volt Invertor.
Since it is not getting normal 3 phase input, I derate it to about 5.5 KVA.
Appropriate fuses and disconnects will be inserted in this system.
Any comments good or bad with this idea?
I have no friends who know this stuff to bounce this off of.
The materials are on hand at another guys shop..cheap
I believe it should work.
Thanks for any and all comments!
Single phase input is usually not a option on 440vac input inverters. They figure if you have 440vac you have three phase. If fed single phase they will give a missing phase alarm.