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The practical speed ranges for the thermal, nuclear and hydel power plants is (in rpm)?

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The practical speed ranges for the thermal, nuclear and hydel power plants is (in rpm)?

(a) 3000, 3000, 300

(b) 3000, 300, 300

(c) 1500, 1500, 3000

(d) 1000, 500, 3000

I have been asked this question during an online exam.

Origin of the question is Synchronous Machine Applications in portion Synchronous Machines of Electrical Machines

1 Answer

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The correct answer is (a) 3000, 3000, 300

The explanation: Thermal and nuclear power plants have high speed requirements and hydel power plants have salient pole generators so the speed is also less.

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