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Circuit Breaker voltage ratings

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  1. nwilliams is offline Junior Member Pro Subscriber
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    Circuit Breaker voltage ratings

    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

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    Kalbi_Rob is offline Experienced Member Pro Subscriber
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    Quote Originally Posted by nwilliams View Post
    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.

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    Which of the following circuit breakers can be installed on a 400 kV line

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

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    Kalbi_Rob is offline Experienced Member Pro Subscriber
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    Quote Originally Posted by tylerfini3 View Post
    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/cir...reakers-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

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    Quote Originally Posted by Kalbi_Rob View Post
    Found this question in the following quiz:
    http://www.electricalquizzes.com/cir...reakers-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

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