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What is single phasing of Motor ? how to protect motor from single phasing ?

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Question added by Himadri Roy , MANAGER ELECTRICAL , STEAG ENERGY SERVICES
Date Posted: 2015/10/03
Emill Bryan Millar
by Emill Bryan Millar , Power (HV) Technician , SOHAR ALUMINIUM COMPANY

Single Phasing can occur as a result of a fuse blowing or a protective device or control device ( e.g. contactor) opening on one phase of the motor

Motor can be protected from single phasing by fitting with an overload relay that can monitor the currents and voltage unbalance on all  three phases of the motor.

 

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