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The motor has to be a dual voltage motor for this operation to happen. This will be a six coil motor. Each motor coil will be rated for a 220 volt drop across it. For the high voltage connection the motor's coils are connected in series between L1 and L2, L2 and L3, and L3 and L1. For the low voltage connection the motor's coils are connected in parallel between L1 and L2, L2 and L3, and L3 and L1.

See sources and related links below. Look on page 76 and 77.

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12y ago
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11y ago

First look on the generators name plate to see if the generator has the capabilities to output 220 volts. If it does then open the junction box that sits on the top to the generator housing (not to be confused with the generator's breaker box). Inside you will see multiple taps that can be repositioned to give you different output voltages. On the underside of the junction box lid there should be diagrams as to how the taps should be rearranged to get the specific voltage that you are looking for.

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Q: How the change a 220 volt generator to 380 volt 3 phase?
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The generator should be about ¾ hp.


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