Interruption of large currents by relay requires______________?
Correct answer: D. all of the above
- A. arc suppressing blow out coils
- B. wide separation of the opened contacts
- C. high speed opening of contacts
- D. all of the above
Explanation
Large-current interruption requires rapid contact separation, sufficient contact gap, and arc-control devices such as blowout coils. These measures work together to extinguish the arc and prevent it from restriking.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
Practise Power Systems
334 free Power Systems MCQs from Electrical Engineering, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
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.
More Power Systems questions
Resistance grounding is used for voltage between_________________?
Wave trap is used to trap waves of__________________?
For the protection of power station buildings against direct strokes the requirements are___________?
The arc voltage produced in A.C. circuit breaker is always_____________?
Overheating of relay contacts or contact born out is due to_______________?
Shunt capacitance is neglected while considering______________?