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A three phase circuit breaker is rated at 2000 MVA, 33 kv. The symmetrical breaking current is
60 kA
20 kA
80 kA
35 kA
60 kA
20 kA
80 kA
35 kA
Answer
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Related Question
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An isolator is installed
to operate the relay of circuit breaker
always independent of the position of circuit breaker
as a substitute for circuit breaker
generally on both sides of a circuit breaker
to operate the relay of circuit breaker
always independent of the position of circuit breaker
as a substitute for circuit breaker
generally on both sides of a circuit breaker
Answer
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The arcing contacts in a circuit breaker are made of
porcelain
electrolytic copper
aluminium alloy
copper tungsten alloy
porcelain
electrolytic copper
aluminium alloy
copper tungsten alloy
Answer
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________ relay is preferred for phase fault on short transmission line.
Impedance
Induction type
Reactance
None of these
Impedance
Induction type
Reactance
None of these
Answer
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A fuse element is generally made of
iron
silver
steel
brass
iron
silver
steel
brass
Answer
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In Railway applications ______ circuit breaker is used.
bulk oil
minimum oil
SFe
air break
bulk oil
minimum oil
SFe
air break
Answer
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