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Air blast circuit breakers for 400 kV power system are designed to operate in 50 millisecond.

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Description : The current zero interruption, in oil and air blast circuit breakers, is achieved by?

Description : The following is/are the characteristics of SF6 circuit breakers:  (A) It does not need an auxiliary breaking chamber (B) Short break time of 2 to 2.5 cycles (C) All of the above (D) None of the above

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