What will happen when a loss of field...

Question 1 / 205eccefa4bacbc34ba4d481c9

Question 1 of 205eccefa4bacbc34ba4d481c9

What will happen when a loss of field excitation to an AC generator occurs while operating in parallel?

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Question 1 of 20

5eccefa4bacbc34ba4d481c9

What will happen when a loss of field excitation to an AC generator occurs while operating in parallel?

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🔍 Key Concepts

• Loss of field excitation on a synchronous AC generator (alternator) • Behavior of a synchronous generator operating in parallel with others • Relationship between excitation, reactive power (kVAR), and prime mover speed/governor

💭 Think About

• Think about what provides the generator’s magnetic field when it is synchronized and sharing load. What happens to its ability to produce voltage and reactive power if that field disappears? • In a parallel setup, when one generator’s excitation is lost, how does the system (bus) react? Does that machine tend to pick up more load, drop its load, or change speed? • Consider what would make a generator accelerate or decelerate when its electrical load changes suddenly. How would losing most or all of its electrical load affect the prime mover speed?

✅ Before You Answer

• Verify what a synchronous generator becomes (in electrical behavior) when its DC field is lost but it remains mechanically driven and connected to the bus. • Check whether speed droop in the governor directly responds to changes in electrical load or to changes in frequency/speed, and how that interacts with losing excitation. • Confirm whether field flashover and smoking are typical immediate effects of loss of excitation, or whether another mechanical/electrical consequence is more likely in a healthy, protected system.

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Question 1 of 20

What will happen when a loss of field excitation to an AC generator occurs while operating in parallel?

It will absorb more and more load due to decreased armature reaction.

It will lose its load due to the inherent speed droop built into the governor.

It will smoke and overload due to field flashover as residual field flux changes polarity.

It will lose its load and possibly over speed.

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Question 1 / 205eccefa4bacbc34ba4d481c9

Question 1 of 205eccefa4bacbc34ba4d481c9

What will happen when a loss of field excitation to an AC generator occurs while operating in parallel?

Back

Question 1 of 20

5eccefa4bacbc34ba4d481c9

What will happen when a loss of field excitation to an AC generator occurs while operating in parallel?

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

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