USCG Exam PracticeMotors and generators
A compound-wound DC generator is described as 'over-compounded.' What does this mean regarding its terminal voltage behavior?
- A. Terminal voltage falls sharply as load increases because the series field opposes the shunt field
- B. Terminal voltage remains perfectly constant from no load to full load
- ✓ Terminal voltage rises with increasing load to compensate for line voltage dropCorrect
- D. Terminal voltage is unstable and varies randomly because the series field dominates
Why C is correct
NEETS Mod. 5 §1-3 defines an over-compounded generator as one in which terminal voltage rises with load to compensate for line drop, distinguishing it from a flat-compounded machine that holds nearly constant voltage. The rising characteristic is intentional for long feeder runs.
Cited:NEETS Mod. 5 §1-3