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Why 3 phase motor not rotates on single phasing condition?Please elaborate.

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Question added by Prabhash Jha , Junior Manager , JSW STEEL LTD
Date Posted: 2014/05/23
md nafis nazar
by md nafis nazar , Electrical Site Engineer- Site Co-ordinator , Rural Electrification Corporation Power Distribuition Company Limited

because single phase cannot produce the rotating flux required to move the rotor , as three phase current all phase lags by120 degrees so produces a rotating flux which gives high starting torque to the motor to operate.

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