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Interruption of large currents by relay requires
arc suppressing blow out coils
all of these
wide separation of the opened contacts
high speed opening of contacts
arc suppressing blow out coils
all of these
wide separation of the opened contacts
high speed opening of contacts
Answer
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Admittance relay is
impedance relay
directional relay
non-directional relay
None of these
impedance relay
directional relay
non-directional relay
None of these
Answer
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The time of closing the cycle, in modern circuit breakers is
0.01 sec
0.10 sec
0.001 sec
0.003 sec
0.01 sec
0.10 sec
0.001 sec
0.003 sec
Answer
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An isolator is designed to open a circuit under
no load
normal conditions
full load
None of these
no load
normal conditions
full load
None of these
Answer
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The relay operating coil is supplied through
current transformer
None of these
fuse
power transformer
current transformer
None of these
fuse
power transformer
Answer
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Relay can be designed to respond to changes in
temperature
voltage and current
All of these
resistance, reactance and impedance
temperature
voltage and current
All of these
resistance, reactance and impedance
Answer
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