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A circuit breaker must perform the duty of
opening the faulty circuit and breaking the fault current
carrying fault current for a short time
being closed on to a fault
All of these
opening the faulty circuit and breaking the fault current
carrying fault current for a short time
being closed on to a fault
All of these
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The device that detects the fault in a power system is
relay
None of these
isolator
circuit breaker
relay
None of these
isolator
circuit breaker
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In Railway applications ______ circuit breaker is used.
bulk oil
minimum oil
air break
SFe
bulk oil
minimum oil
air break
SFe
Answer
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The rated secondary current of current transformer for relays is generally
20 A
5 A
30 A
10 A
20 A
5 A
30 A
10 A
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protection of fuses is generally not used beyond
100 A
200 A
50 A
20 A
100 A
200 A
50 A
20 A
Answer
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Resistance grounding is used for voltage between
33 kV to 66 kV
None of these
3.3 kV to 11 kv
11 kv to 33 kv
33 kV to 66 kV
None of these
3.3 kV to 11 kv
11 kv to 33 kv
Answer
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