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The rated secondary current of current transformer for relays is generally
30 A
20 A
10 A
5 A
30 A
20 A
10 A
5 A
Answer
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Related Question
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The torque produced in induction type relay is
inversely proportional to the square of the current
proportional to the current
inversely proportional to the current
proportional to square of the current
inversely proportional to the square of the current
proportional to the current
inversely proportional to the current
proportional to square of the current
Answer
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The transient voltage that appears across the contacts at the instant of arc extinction is called
supply voltage
recovery voltage
restriking voltage
peak voltage
supply voltage
recovery voltage
restriking voltage
peak voltage
Answer
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For the same power, the least size is of
vaccum circuit breaker
oil circuit breaker
air-blast circuit breaker
sf6 circuit breaker
vaccum circuit breaker
oil circuit breaker
air-blast circuit breaker
sf6 circuit breaker
Answer
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The voltage appearing across the contacts after opening of the circuit breaker is called
recovery voltage
arc voltage
surge voltage
operating voltage
recovery voltage
arc voltage
surge voltage
operating voltage
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The device that detects the fault in a power system is
None of these
circuit breaker
relay
isolator
None of these
circuit breaker
relay
isolator
Answer
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