Which of the following actions must be...

Which of the following actions must be...

Question 1 of 270705eccefa4bacbc34ba4d48192

Which of the following actions must be carried out prior to closing the alternator circuit breaker according to the graph "A" shown in the illustration? See illustration EL-0002.

Question 1 of 27070

Q

Which of the following actions must be carried out prior to closing the alternator circuit breaker according to the graph "A" shown in the illustration? See illustration EL-0002.

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🔍 Key Concepts

• Paralleling generators requires matching voltage, frequency, and phase with the bus before closing the breaker. • In graph A, compare the amplitude (height) of the BUS sine wave to that of the incoming machine sine wave. • Generator terminal voltage is adjusted by changing excitation on the incoming alternator.

💭 Think About

• Look at the two sine waves in graph A: is the incoming machine’s voltage higher or lower than the bus voltage at their peaks? • If you were the watch engineer trying to parallel this machine, what single adjustment to the incoming alternator’s voltage would bring the two wave amplitudes into agreement? • Remember: you don’t change the bus voltage when bringing an incoming alternator online—what do you change instead?

✅ Before You Answer

• Verify which waveform in graph A is labeled BUS and which is labeled Incoming Machine. • Compare their peak voltages (wave heights) just before the point marked "Waves in Synchronism." • Confirm that your chosen action adjusts the incoming alternator’s voltage, not the bus or line voltage.