Exam Question

(a) How do the leakage fluxes effect the operation of a transformer? How are they minimized? (6)

(b) A 440 V load of 400 kw at 0.8 (lagging) power factor is jointly supplied by two alternators A and B. The KW load on A is 150 KW and the KVAr load on B is 150 kVA (lagging). Determine the kW load on B, the KWAr load on A, the power factor of operation on each machine and the current loading of each machine. (10)