Hello we have a single phase pump 115/230 ac volts and the shop we want to use it in has three phase 230 volt system, but no 230 single phase service available to us for now, would it work off of just using two of the legs off the three phase service. any ideas would be really appreciated thanks.
three phase to single motor
- Thread starter hotrod
- Start date
controlled
Lifetime Supporting Member
You mention that the pump is 115/230 volts. You can use any 2 legs of a 3 phase system, unless the controls for the pump need 115 volts, then you will also need a neutral connection.
120/240 means it's a dual voltage motor. Nothing to do with needing both to run. Control voltage if needed would come from a transformer in the starter.
controlled
Lifetime Supporting Member
rpoet
Member
hotrod,
Why not just rewire the pump's motor to use 120v? I realize the amperage draw will be higher, but if it's a single phase motor, it can't be that big anyway. If you run your motor from two phases, it will only get 208v, and will most likely run hot, as it's under volt-ed.
-rpoet
Why not just rewire the pump's motor to use 120v? I realize the amperage draw will be higher, but if it's a single phase motor, it can't be that big anyway. If you run your motor from two phases, it will only get 208v, and will most likely run hot, as it's under volt-ed.
-rpoet
They have a 240v system, not 208v
Who are you referring your question to? The OP already stated 240v 3 phase. You will have to assume from there..
rpoet
Member
controlled
Lifetime Supporting Member
The only flavor of three phase I am really sure about is 208 Wye that it does not have a wild leg. It is possible that the variety of three phase he is dealing with has a wild leg and if so, don't just pick any two legs to connect the motor.
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