Q1. Direct online starting for large induction motors such as those for bow thrust units, may not be viable.
a) State the reasons for this. (5)
b) Sketch a starting system that may be used for such motors. (6)
c) Describe the starting method sketched in (a, b). (6)
Q2. What is a Marine High Voltage System? Sketch and describe a Shipboard high voltage switch board and its protective devices. (16)
Q3. What is soft starting of an Induction Motor? Describe with a circuit using thyristors used for soft starting. Discuss its advantages and disadvantages. (16)
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