Question 71Electricity & Electronics - Assistant Engineer

The correct answer is D) automatic bus transfer device. When the normal power supply fails, the automatic bus transfer device automatically disconnects the normal power supply and connects the emergency generator to the emergency bus. This is done to ensure that critical systems and equipment continue to receive power even in the event of a primary power failure. The automatic bus transfer device is a key safety feature that is required by regulations to be installed on commercial vessels. The other options are incorrect because they do not accurately describe the mechanism by which the emergency generator is connected to the emergency bus during a power failure. A bus tie feeder, line connection feeder, and power failure alarm bus are not the means by which this is accomplished.