Question 268Electricity & Electronics - QMED

The correct answer is A) Provide power to the 450 VAC emergency bus from the emergency generator in the emergency mode. The automatic bus transfer device is used to automatically switch the power source for the 450 VAC emergency bus from the main 450 VAC bus to the emergency generator in the event of a power failure. This ensures that essential systems and equipment connected to the emergency bus continue to receive power during an emergency, as required by maritime regulations for vessel safety and operability. The other answer choices are incorrect because they do not accurately describe the purpose of the automatic bus transfer device as shown in the illustration.