ccleix Posts: 2, Reputation: 1 New Member #1 Nov 3, 2015, 03:49 PM
220v single phase motor run on two legs of three phase.
Can a standard 220v motor that is run on a common 110/220v supply be run using two legs of a three phase system? I have seen it done and the motor runs but eventually fails. Is the failure caused by the phase difference ie: 120 deg vs. 180 deg voltages or different voltages in the three phase systems.
 Fr_Chuck Posts: 81,302, Reputation: 7692 Expert #2 Nov 4, 2015, 10:38 PM
 ebaines Posts: 12,132, Reputation: 1307 Expert #3 Nov 6, 2015, 12:29 PM
What is the voltage of the 3-phase? The voltage across any two legs would be $\small \sqrt 3$ greater than the voltage of each leg (though still a 60 Hz sine wave).

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