Compute the starting torque with the starting compen sator, Electrical Engineering

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A three-phase, 2200-V, 60-Hz, delta-connected, squirrel-cage induction motor, when started at full rated voltage, takes a starting current of 693 A from the line and develops a starting torque of 6250 N · m.

(a) Neglect the impedance and the exciting current of the compensator.

Calculate the ratio of a starting compensator (i.e., an auto-transformer starter) such that the current supplied by the 2200-V line is 300 A.

Compute the starting torque with the starting compen sator.

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