According to 46 CFR, Subchapter J (Electrical Engineering), in response to a loss of normal power or a simulated test, when will the emergency loads automatically be transferred to the emergency diesel generator?
• 46 CFR Subchapter J requirements for automatic starting and transfer of the emergency generator • Difference between ship’s service (normal) power voltage and emergency generator voltage conditions • What percentage of rated voltage is typically required before automatic connection of critical/emergency loads
• Look at which answer choice deals with the condition on the emergency generator itself, not just the failure condition of the normal power • Ask yourself: Do we connect sensitive emergency loads when the emergency generator is just starting, or after its voltage has stabilized within a certain band? • Consider what would happen to equipment if it were connected while voltage was still too low or unstable—does 46 CFR allow that for emergency circuits?
• Verify in 46 CFR Subchapter J the required voltage range (percent of rated) before automatic connection of emergency loads • Confirm whether the regulation triggers transfer based on loss of normal power or on achievement of proper emergency generator voltage • Check that the timing condition matches both loss of normal power or a simulated test as stated in the question
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