Exam Question

(a) Explain the Principle of a Transformer? Discuss the various types of transformers used onboard? (8)

(b) In a container ship, a 3-ph, delta/ delta connected 6600/440 V, 60 Hz transformer is feeding AMP supply from shore to 440 Volt switchboard Transformer primary current takes a line current of 100 amp, when secondary Load of 0.8 Lagging p.f. is connected. Determine each coil- current and KW output of transformer. (8)