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The relay operating coil is supplied through

current transformer
fuse
None of these
power transformer

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In a circuit breaker the time duration from the instant of the fault to extinction of arc is known as

lag time
operation time
clearing time
lead time

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The fuse rating is expressed in terms of

kVA
current
VAR
voltage

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Resistance grounding is used for voltage between

3.3 kV to 11 kv
None of these
11 kv to 33 kv
33 kV to 66 kV

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With which of the following, a circuit breaker must be equipped for remote operation ?

inverse time trip
shunt trip
time-delay trip
None of these

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When transmission line is energized, the wave that propagates on it is

current wave only
both current wave and voltage wave
voltage wave only
power factor wave only

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