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Q4) A THREE-phase, 8-pole, 440 V, induction motor drives an 8-kW load at a power factor of 0.85 lagging with a shaft speed of 14.4 rev/s and a slip of 4%. The stator and rotational losses are 1 kW and 0.8 kW respectively.

(a) Determine EACG of the following:

(i) the supply frequency; (4)

(ii) the frequency of the rotor EMF; (2)

(iii) the input power to the motor; (4)

(iv) the supply current. (2)

(b) Insert the power values on the power-flow diagram provided in Worksheet Q4. (4)