When two generators are operating in...

Question 1 / 2066636eec28f7522a1c51cfc8

Question 1 of 2066636eec28f7522a1c51cfc8

When two generators are operating in parallel, what will happen if one engine driving a generator shuts down?

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Question 1 of 20

66636eec28f7522a1c51cfc8

When two generators are operating in parallel, what will happen if one engine driving a generator shuts down?

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🔍 Key Concepts

• Parallel operation of AC generators and how load is shared between them • What happens to power flow if one prime mover (engine) stops while the generator is still connected to the bus • The purpose of reverse power protection and overload protection on generator circuit breakers

💭 Think About

• If two generators are in parallel and one engine suddenly stops providing torque, think about which way the power will try to flow: from the dead machine to the bus, or from the live bus to the dead machine? • Which protective relay acts first when power starts to flow in the wrong direction versus when current becomes too large? Consider the time it takes for each to operate. • If only one generator is left carrying the whole load, under what condition would its breaker trip on overload, and would that be instantaneous or time‑delayed?

✅ Before You Answer

• Verify which device is designed specifically to detect power flowing into a generator instead of out of it. • Consider whether an AC generator that has lost its driving engine will tend to slow down and become a motor if it remains connected to an energized bus. • Check which trip condition – reverse power or overload – is normally set with a faster response in standard shipboard generator protection.

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Question 1 of 20

When two generators are operating in parallel, what will happen if one engine driving a generator shuts down?

Both generators will immediately shut down.

The stalled generator's circuit breaker will trip on reverse power.

The generator that's still running will motorize.

The running generator's circuit breaker will immediately trip on overload.

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Question 1 / 2066636eec28f7522a1c51cfc8

Question 1 of 2066636eec28f7522a1c51cfc8

When two generators are operating in parallel, what will happen if one engine driving a generator shuts down?

Back

Question 1 of 20

66636eec28f7522a1c51cfc8

When two generators are operating in parallel, what will happen if one engine driving a generator shuts down?

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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