You are attempting to parallel two AC...

Question 1 / 205eccefa4bacbc34ba4d481b0

Question 1 of 205eccefa4bacbc34ba4d481b0

You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. What is the oncoming generator frequency relative to that of the bus frequency?

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Question 1 of 20

5eccefa4bacbc34ba4d481b0

You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. What is the oncoming generator frequency relative to that of the bus frequency?

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🔍 Key Concepts

• Synchroscope rotation: what the pointer’s direction (fast vs. slow) tells you about the frequency difference • Conditions for paralleling AC generators: same voltage, same frequency, and in phase with the bus • How the oncoming generator’s frequency must compare to the bus to make the pointer move one way versus the other

💭 Think About

• Imagine the bus frequency is fixed. If the oncoming generator runs slightly faster, what happens to the phase angle over time? Which way would the pointer move? • Now imagine the generator runs slightly slower than the bus. How would the phase difference change, and how would that affect the pointer’s direction? • Why can’t the pointer stand still if the frequencies are not exactly the same? What does a slowly moving pointer indicate about how close the two frequencies are?

✅ Before You Answer

• Be clear on which direction is labeled ‘fast’ and which is labeled ‘slow’ on a typical shipboard synchroscope (usually marked on the dial). • Confirm that direction of rotation indicates whether the oncoming generator is faster or slower than the bus, not just ‘out of phase’. • Remember that when frequencies are exactly equal, the pointer will appear nearly stationary, and you close the breaker at the ‘in-phase’ (12 o’clock) position only.

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Question 1 of 20

You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. What is the oncoming generator frequency relative to that of the bus frequency?

higher than the bus frequency

lower than the bus frequency

the same as the bus frequency but out of phase with it

the same as the bus frequency, and the circuit breaker may be closed at any pointer position

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Question 1 / 205eccefa4bacbc34ba4d481b0

Question 1 of 205eccefa4bacbc34ba4d481b0

You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. What is the oncoming generator frequency relative to that of the bus frequency?

Back

Question 1 of 20

5eccefa4bacbc34ba4d481b0

You are attempting to parallel two AC generators and the synchroscope pointer is revolving in the slow direction. What is the oncoming generator frequency relative to that of the bus frequency?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed