In the diagram of the switchboard shown in...

Question 1 / 205eccefa4bacbc34ba4d48466

Question 1 of 205eccefa4bacbc34ba4d48466

In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happen? Illustration EL-0003

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Question 1 of 20

5eccefa4bacbc34ba4d48466

In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happen? Illustration EL-0003

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🔍 Key Concepts

• Turbine trip and generator behavior in an AC ship’s power plant • Function of a reverse power relay on a generator that is still connected to the bus • How the exciter, main field, and generator circuit breaker are arranged in the EL-0003 switchboard diagram

💭 Think About

• When a turbine trips, what happens to the prime mover torque on that alternator while it is still connected to the main distribution bus? Does power flow into it or out of it? • Looking at the diagram, which device would act to protect a failed turbo‑alternator from being motored by the rest of the system? How would that protection operate? • Which options describe normal automatic protective action, and which ones describe actions that would be manual or unrelated to a single‑generator turbine trip?

✅ Before You Answer

• Identify in the diagram where the reverse power relay would sense current and power direction relative to the generator circuit breaker. • Decide whether a turbine trip should cause the generator to become a motor load on the bus unless a protective device operates. • Verify whether the emergency generator is intended to start for a single‑turbine trip when ship service power is still available from another online unit.

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Question 1 of 20

In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happen? Illustration EL-0003

The device labeled 'Exciter' will drive the alternator.

The device labeled 'Generator Circuit Breaker' for that alternator should automatically open because of the reverse power relay.

The operator must open all the devices labeled 'Generator Circuit Breaker' to reduce the load on the remaining turbo-alternator.

The emergency generator should automatically start and be placed on line to supply emergency load centers.

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Question 1 / 205eccefa4bacbc34ba4d48466

Question 1 of 205eccefa4bacbc34ba4d48466

In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happen? Illustration EL-0003

Back

Question 1 of 20

5eccefa4bacbc34ba4d48466

In the diagram of the switchboard shown in the illustration, if one of the turbines should fail due to a throttle trip, what will happen? Illustration EL-0003

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

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