220 ac volts single phase adapter to 550 ac volts 3 phase

Two ways: use a single phase transformer to step 220 up to 550 and make a 550VAC phase converter, or convert 220 1ph to 220 3ph and then use a three phase transformer to step up to 550 3 phase. Be sure you size your transformer large enough. - GWE

Anyone know if there is a VFD to do this? Not only do you get the required voltage/phase change but variable speed as a bonus.

GmcD

JW

My plan is too step up the 240V to 575V with a single phase transformer and then feeding it to a 575V VFD (derating it due to the single phase input). I hope to use one transformer to feed all the machines, but separate VFD will be required for each one. I am in the process of buying the required stuff and will let the newsgroup know how it goes. Tonight I have to finish pulling the wire to the shop, I have the transformer ($160 Can for a 1750 VA) and am in the process of buying a used VFD.

stan

My bridgeport is what I use most of the time, I also have a gearhead drill press and a pedastal grinder that need 575V, none of these draws much or starts under load. My lathe is another story, it will be running on the generator for a while yet.

stan