The following test data apply to a 208-V, 6-pole, Y-connected, three-phase induction motor:
-   No-load test: Power input = 336W, line current = 2A at rated voltage
-   Blocked-rotor test: Power input = 600W, line current = 20A at the line voltage of 30-V
-   The friction and windage loss is 36W. The resistance between any two lines is 0.2.

Determine:

a)   The equivalent circuit parameter of the motor.

b)   This motor is connected to a distribution feeder. The driving point impedance of the feeder is 0.15+j0.3 per phase. The line-to-line voltage of the source is 208V.

Determine the level of the voltage sag at motor starting.