The essential condition for parallel operation of two D.C. generators is that they have ________________?
Correct answer: C. the same drooping voltage characteristics
- A. same kW rating
- B. the same operation r.p.m.
- C. the same drooping voltage characteristics
- D. same percentage regulation
Explanation
Drooping voltage characteristics make the load division between parallel generators stable: a generator that takes more current develops a slightly lower terminal voltage and naturally sheds some load. Equal kW rating, speed, or percentage regulation is not essential.
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