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________ relay is preferred for phase fault on short transmission line.
Induction type
Reactance
None of these
Impedance
Induction type
Reactance
None of these
Impedance
Answer
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Related Question
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When a fault occur in a power system, the circuit breaker
is opened by remote control
is opened manually
opens automatically
None of these
is opened by remote control
is opened manually
opens automatically
None of these
Answer
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To reduce short circuit fault currents......... are used.
resistors
reactors
None of these
capacitors
resistors
reactors
None of these
capacitors
Answer
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The rating of a circuit breaker is generally determined on the basis of
single line to ground fault current
line to line fault current
symmetrical fault current
double line to ground fault current
single line to ground fault current
line to line fault current
symmetrical fault current
double line to ground fault current
Answer
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The normal current in a power line is 100 A. If a short-circuit fault occurs on the line, then one can expect the short-circuit current to be
100 A
300 A
200 A
more than 1000 A
100 A
300 A
200 A
more than 1000 A
Answer
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Most of the relays on service on electric power system are
None of these
electronic relays
electro-mechanical relays
thermal relays
None of these
electronic relays
electro-mechanical relays
thermal relays
Answer
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