Question 264Electricity & Electronics - Assistant Engineer

The correct answer is C) when the potential from the emergency generator reaches 85 to 95 percent of its normal value. According to 46 CFR, Subchapter J (Electrical Engineering), in the event of a loss of normal power or a simulated test, the emergency loads will automatically be transferred to the emergency diesel-generator once the potential from the emergency generator reaches 85 to 95 percent of its normal value. This ensures that the emergency generator has stabilized and is ready to take on the essential electrical loads before the transfer occurs. The other options are incorrect because: A) the transfer does not occur as soon as the emergency generator is started, as it needs to reach the required voltage range first; B) the transfer is not based on the drop in the ship's service generators, but rather the rise in the emergency generator voltage; and D) the transfer is not based on the ship's service generators dropping to 85-95% of normal, but rather the emergency generator reaching that voltage range.