Q2. a) Sketch a circuit diagram of a push button direct on line contactor starter for a three phase Incorporating overload and short circuit protection. (8)
b) Indicate, on a sketch of the typical characteristic curves of current and torque against Speed, disadvantages of a direct online start squirrel cage induction motor. (8)
Q3. With reference to the provision of a shore electrical supply to a ship:
a) Sketch an arrangement for taking A.C. Shore supply and checks to be carried out prior taking shore connection? (8)
b) Describe the methods of safely connecting the arrangement sketched in (A) to the shore supply? (8)
Q3. a) Sketch a main engine shaft driven generator arrangement with an electronic system for frequency correction. (8)
b) Describe the operation of the generator arrangement sketched in (a). (8)
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