Moderate
When the 3-phase system is not grounded and if Single Line to Ground fault occurs, the voltage of the other two healthy phases will____________?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remains unaffected
Explanation
In an ungrounded system, a single line-to-ground fault shifts the neutral potential. The two healthy phase-to-ground voltages rise to approximately the line voltage, or √3 times their normal value.
Last updated
Practise Power Systems
334 free Power Systems MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Electrical Engineering questions like this
Electrical Engineering is on 2 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.