A. pulling the motor directly online without a starter
B. locking of rotor due to harmonics
C. starting the motor on load which is more than the rated load
D. interchanging two supply phases for quick stopping
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A. pulling the motor directly online without a starter
B. locking of rotor due to harmonics
C. starting the motor on load which is more than the rated load
D. interchanging two supply phases for quick stopping
This is done by reversing the two phases out of the three-phase circuit while the motor is running, in order to change the direction of the rotor-induced voltage. The injected voltage must have the same frequency, same phase shift, and opposite direction to the rotor-induced voltage. T
his method is generally used when the applied voltage is 50% of the rated value, as it reduces the starting torque to only 25% of its normal voltage value.