The main factor which leads to unstable parallel operation of flat and over compounded generators is_____________?
Correct answer: A. their rising voltage characteristics
- A. their rising voltage characteristics
- B. unequal number of turns in their series field windings
- C. unequal speed regulation of their primemovers
- D. unequal series field resistances
Explanation
Flat and over-compounded generators have voltage characteristics that do not share load stably, particularly because the over-compounded unit has a rising terminal voltage with load. Such rising characteristics can cause one machine to take progressively more load.
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