Q3. With Respect to Insulated and Earthed Neutral Systems used on board:
a) Discuss the Advantages and Disadvantages of both Insulated and Earthed Systems used on board. (8)
b) What is earth fault and how do you identify Earth fault in the 440 V system onboard. (4)
c) Discuss the consequences of earth fault in an earthed distribution system. (4)
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)
Q3. With the help of a neat diagram, explain the operation of a Bridge Rectifier. (16)
Q5. Explain with the help of a neat diagram the operation of a brushless alternator. What would likely happen if one of the rotating Diode fails and becomes: (16)
a) An open circuit?
b) A short circuit?
Q1. With respect to generators and main circuit breakers and their protection devices:
a) What are safeties incorporated in Air circuit breaker (ACB) of ship’s generator and prime mover? (10)
b) Write Short Note on Negative phase Sequence Relay. (6)
Username or email address *Required
Password *Required
Note: Entering wrong username in the login form will ban your IP address immediately. Entering wrong password multiple times will also ban your IP address temporarily.
Log in
Lost your password? Remember me
No account yet?
