Question 400Electricity & Electronics - Assistant Engineer

The correct answer is D) Prevent any unintentional grounds in the refrigerated container distribution system from affecting the main distribution system. The purpose of the transformers providing power to the refrigerated container feeder bus is to isolate the refrigerated container distribution system from the main distribution system. This prevents any unintentional grounds or faults in the refrigerated container system from affecting the main power distribution, which could disrupt power to other critical systems on the vessel. The other answer choices are incorrect because they do not accurately describe the purpose of the transformers in this scenario. Stepping up or down the voltage is not the primary function, and the transformers do not prevent grounds in the main system from affecting the refrigerated containers, but rather the other way around.