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At zpf lag, the excitation should be increased in order to maintain the armature terminal voltage constant.

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At zpf lag, the excitation should be increased in order to maintain the armature terminal voltage constant.

(a) True

(b) False

I had been asked this question during an interview.

Question is from Operating Characteristics of Alternators and their Ratings in portion Synchronous Generators of Electrical Machines

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Best answer
Correct option is (a) True

Best explanation: Due to demagnetizing armature reaction at zpf lag in an alternator.

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