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The operating time of a fuse is about
1 sec
1.5 sec
0.002 sec
0.8 sec
1 sec
1.5 sec
0.002 sec
0.8 sec
Answer
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Related Question
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Directional relay are based on flow of
current
voltage wave
All of these
power
current
voltage wave
All of these
power
Answer
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Distance relays are generally
split-phase relays
reactance relays
none of these
impedance relays
split-phase relays
reactance relays
none of these
impedance relays
Answer
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If the fault occurs near the impedance relay, the V/ I ratio will be
higher than that of if fault occurs away from the relay
constant for all distances
Lower than that of if fault occurs away from the relay
None of these
higher than that of if fault occurs away from the relay
constant for all distances
Lower than that of if fault occurs away from the relay
None of these
Answer
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The fusing factor is
always less than 1
always 1
None of these
always more than 1
always less than 1
always 1
None of these
always more than 1
Answer
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Arc in a circuit breaker behaves as
a resistance increasing with voltage rise across the arc
a capacitive reactance
a resistance decreasing with voltage rise across the arc
an inductive reactance
a resistance increasing with voltage rise across the arc
a capacitive reactance
a resistance decreasing with voltage rise across the arc
an inductive reactance
Answer
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