Question 516Electricity & Electronics - QMED

The correct answer is C) automatic bus transfer switch. When the ship's normal electrical power supply fails, the emergency generator is designed to automatically supply power to the emergency switchboard through an automatic bus transfer switch. This switch is responsible for detecting the loss of normal power and then seamlessly transferring the power supply to the emergency generator, without the main switchboard being affected. This ensures that critical systems, such as emergency lighting and navigation equipment, continue to function even in the event of a main power failure. The other options are incorrect because: A) the power failure alarm bus is not responsible for the power transfer, B) the main lighting transformer is not involved in the emergency power supply, and D) the main switchboard bus is not the pathway for the emergency generator's power supply.