Moderate
Which of the following relays is used on long transmission lines?
Correct answer: B. Mho's relay
- A. Impedance relay
- B. Mho's relay
- C. Reactance relay
- D. None of the above
Explanation
A mho relay is inherently directional and has a circular characteristic well suited to long, high-voltage transmission lines. Impedance and reactance relays are also used in protection, but the standard choice for long lines is the mho relay.
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.