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a) A 3-൩, 400 V, 14.91 kW induction motor gave the following test results. (6) NL test :
400 V, 1250 W, 9A.

BR test : 150 V, 4000 W, 38 A.

Draw the circle diagram and determine the full load current, power factor, slip and

efficiency.

b) With a neat diagram, explain the capacitor start and run type of induction motor.
(4)

a) Describe the principle of operation of an induction generator. Compare grid (5) connected
and self excited type of induction generators.

b) Describe any two methods of speed control of a 3-60 induction motor. (5) ****

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