Regarding an AC generator connected to the...

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Question 1 of 205eccefa4bacbc34ba4d48160

Regarding an AC generator connected to the main electrical bus; as the electric load and power factor vary, a corresponding change is reflected in the generator armature reaction. How are these changes in armature reaction compensated for?

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🔍 Key Concepts

• Armature reaction in an AC generator and what it does to terminal voltage when load and power factor change • What device in a generator system automatically adjusts field excitation to keep voltage within limits • The difference between devices that control speed/frequency and those that control voltage/excitation

💭 Think About

• When load and power factor change, what main electrical quantity at the generator terminals is affected by armature reaction? • Which component in a ship’s AC power system is specifically designed to sense changes in this quantity and automatically correct it? • Look at each option and ask: does this act on engine speed, phase relationships between lines, or on the generator field current?

✅ Before You Answer

• Identify which option directly controls generator field current / excitation rather than speed or protection only • Eliminate any choice that mainly deals with frequency control instead of voltage control • Eliminate any device that primarily functions as a protective relay rather than a continuous regulating device

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