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Q3). Three loads of 100 , 0.2 H and 50 Ω are respectively connected in star to the R, S and T phases of a three-phase, 4-wire, 440 V, 60 hz supply.

(a) Determine EACH of the following:

(i) the current in each load; (4)

(ii) the total power supplied to the load.   (2)

(b) Sketch, approximately to scale, a clearly labelled phasor diagram showing the phase voltages and the load currents. (4)

(c) Determine the magnitude of the neutral current and its angle (relative to the R phase). (6)