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Experimental investigation into operation under single-phasing condition of a three-phase induction motor connected across a zigzag transformer

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2 Author(s)
Basu, K.P. ; Fac. of Eng., Multimedia Univ., Cyberjaya, Malaysia ; Mukerji, S.K.

A negative-sequence current produced during the single-phasing condition of a three-phase induction motor does not allow the motor to start and creates excessive heating while running. To eliminate the negative-sequence current, and thus to operate the motor satisfactorily under a single-phasing condition, the student is to connect a zigzag winding transformer with its star point connected to a system neutral across the motor. This experiment provides a thorough understanding of the sequence network connections under the single-phasing condition of a three-phase induction motor.

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Education, IEEE Transactions on  (Volume:47 ,  Issue: 3 )