Circuit Breaker voltage ratings

[nwilliams]

Which of the following circuit breaker designs has the lowest voltage rating?

Air-break circuit breaker

Tank type oil circuit breaker

Air-blast circuit breaker

SF6 circuit breaker

[Kalbi_Rob]

Which of the following circuit breaker designs has the lowest voltage rating?

Air-break circuit breaker

Tank type oil circuit breaker

Air-blast circuit breaker

SF6 circuit breaker

I would assume Air-break circuit breaker since it has the lowest dielectric insulator, and least intrusive arc removal system. Oil and SF6 provide an arc quencing dielectric and the air-blast distinguishes the arc between the main line contacts quickly. Air-break circuit breaker just breaks the main line contacts and draws the arc away on the arc chutes, and is the only breaker listed used at 480V or less in the modern era.

[tylerfini3]

I put tank type oil circuit breaker. Does anyone have the answer for this?

[Kalbi_Rob]

I put tank type oil circuit breaker. Does anyone have the answer for this?

Found this question in the following quiz:
http://www.electricalquizzes.com/circuit-breakers/circuit-breakers-mcqs-2

17. Which of the following circuit breaker can be installed on 400 kV line

(A) Tank type oil circuit breaker

(B) Miniature circuit breaker

(C) Vacuum circuit breaker

(D) Air blast circuit breaker.




Answer is D

[tylerfini3]

Found this question in the following quiz:
http://www.electricalquizzes.com/circuit-breakers/circuit-breakers-mcqs-2

17. Which of the following circuit breaker can be installed on 400 kV line

(A) Tank type oil circuit breaker

(B) Miniature circuit breaker

(C) Vacuum circuit breaker

(D) Air blast circuit breaker.




Answer is D

That would of been my guess. Thank you

[epenland]

Found this question in the following quiz:
http://www.electricalquizzes.com/circuit-breakers/circuit-breakers-mcqs-2

17. Which of the following circuit breaker can be installed on 400 kV line

(A) Tank type oil circuit breaker

(B) Miniature circuit breaker

(C) Vacuum circuit breaker

(D) Air blast circuit breaker.




Answer is D