In a single bus-bar system there will be complete shut down when
A. fault occurs on the bus itself
B. fault occurs on neutral line
C. two or more faults occur simultaneously
D. fault occurs with respect to earthing
Answer: Option A
This Question Belongs to Electrical Engineering >> Switchgear Protections
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Magnetic circuit breaker has ______ trip action.
A. delayed
B. instantaneous
C. both of the above
D. none of the above
In a circuit breaker the basic problem is to
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B. extinguish the arc
C. transmit large power
D. emit the ionizing electrons
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B. porcelain
C. electrolytic copper
D. aluminium alloy
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B. short duty
C. intermittant duty
D. repeated duty
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