7-20. Answer the following questions about the motor in Problem 7-19.
(a) If this motor is started from a 208-V infinite bus, how much current will flow in the motor at starting?
(b) If transmission line with an impedance of 0.50 + j0.35 Ω per phase is used to connect the induction motor to the infinite bus, what will the starting current of the motor be? What will the motor’s terminal voltage be on starting?
(c) If an ideal 1.2:1 step-down autotransformer is connected between the transmission line and the motor, what will the current be in the transmission line during starting? What will the voltage be at the motor end of the transmission line during starting?
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