Air blast circuit breaker is used for?

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Answer :

Air blast circuit breaker is used for repeated duty.

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Air blast circuit breakers for 400 kV power system are designed to operate in?

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Description : The arc temperature in Oil Circuit Breaker may reach up to_______.  (A) 5,000° K (B) 8,000° K (C) 10,000° K (D) None of the above

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Description : The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

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A circuit breaker is designed to protect an electrical circuit from damage caused by :

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The Minimum Oil Circuit Breaker (MOCB) is named because of :

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Last Answer : The Minimum Oil Circuit Breaker (MOCB) is named because of : Reduced requirement of oil 

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Last Answer : Arc in a circuit breaker is interrupted at zero current.

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Last Answer : The arc voltage produced in A.C. circuit breaker is always in phase with the arc current.

In a circuit breaker the basic problem is to?

Last Answer : In a circuit breaker the basic problem is to transmit large power.

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Last Answer : The voltage appearing across the contacts after opening of the circuit breaker is called recovery voltage.

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The arcing contacts in a circuit breaker are made of?

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Series reactors are used to

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A switchgear is device used for?

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