Q1. (a) Draw circuit diagram and explain working of Star – Delta starter. (8)
(b) Explain with diagram how direction of single phase induction motor is reversed. (8)
Q2. Briefly explain the principle of operation of Variable Frequency Drives (VFD). Discuss the
advantages and disadvantages of VFDs onboard merchant vessels? (16)
Q1.a) Explain three methods of overcurrent protection for electrical circuit. (8)
b) Explain with aid of diagram, the meaning of the term inverse current time characteristic (8)
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