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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
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Minimum arcing voltage will be least in case of
carbon
graphite
silver
tungsten
carbon
graphite
silver
tungsten
Answer
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The relay operating coil is supplied through
power transformer
None of these
fuse
current transformer
power transformer
None of these
fuse
current transformer
Answer
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Series capacitors are used to
compensate for line inductive reactance
None of these
improve line voltage
compensate for line capacitive reactance
compensate for line inductive reactance
None of these
improve line voltage
compensate for line capacitive reactance
Answer
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Which of the following is used in liquid fuses ?
carbon tetrachloride
distilled water
transformer oil
sulphur hexafluoride
carbon tetrachloride
distilled water
transformer oil
sulphur hexafluoride
Answer
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An isolator is installed
as a substitute for circuit breaker
always independent of the position of circuit breaker
generally on both sides of a circuit breaker
to operate the relay of circuit breaker
as a substitute for circuit breaker
always independent of the position of circuit breaker
generally on both sides of a circuit breaker
to operate the relay of circuit breaker
Answer
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