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Q18. A three-phase, 415V, 4 -wire, unbalanced load has currents as shown in Table.

a) Sketch, approximately to scale, a labelled phasor diagram to show the relationship between the phase voltages and the currents given in Table Q3, include angles.

b) Calculate EACH of the following:

(i) the current in the R phase and its phase angle with respect to V_RN (4)

(ii) the total load power. (4)

c) Sketch and label the current phasor IR on the diagram for Q3(a), and indicate the phase angle φ_R