Hamad Switchgear and Protection 14/06/2020 A. current wave only B. voltage wave only C. Both (A) and (B) D. power factor wave only Related Mcqs: Magnetic circuit breaker has ___________ trip actionA. delayed B. instantaneous C. both of the above D. none of the above... Air blast circuit breaker is used for_____________?A. over currents B. short duty C. intermittant duty D. repeated duty... Ionization in circuit breaker is facilitated by___________?A. high temperature B. increase of mean free path C. increasing field strength D. all of the above... Which of the following circuit breakers has high reliability and minimum maintenance ?A. Air blast circuit breakers B. Circuit breaker with SF6 gas C. Vacuum circuit breakers D. Oil circuit breakers... To limit short-circuit current in a power system are used______________?A. earth wires B. isolators C. H.R.C. fuses D. reactors...
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