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Insulation resistance of high voltage circuit breakers is more than
500 mega ohms
10 mega ohms
1 mega ohms
100 mega ohms
500 mega ohms
10 mega ohms
1 mega ohms
100 mega ohms
Answer
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Related Question
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A differential relay measures the vector difference between
two or more similar electrical quantities
None of these
two currents
two voltages
two or more similar electrical quantities
None of these
two currents
two voltages
Answer
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A fuse in a motor circuit provides protection against
overload
short-circuit and overload
open circuit, short-circuit and overload
None of these
overload
short-circuit and overload
open circuit, short-circuit and overload
None of these
Answer
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The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to
extinguish the arc
lubricate the contacts
insulate the contacts from switch body
All of these
None of these
extinguish the arc
lubricate the contacts
insulate the contacts from switch body
All of these
None of these
Answer
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The voltage appearing across the contacts after opening of the circuit breaker is called
arc voltage
recovery voltage
surge voltage
operating voltage
arc voltage
recovery voltage
surge voltage
operating voltage
Answer
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An isolator is installed
generally on both sides of a circuit breaker
always independent of the position of circuit breaker
as a substitute for circuit breaker
to operate the relay of circuit breaker
generally on both sides of a circuit breaker
always independent of the position of circuit breaker
as a substitute for circuit breaker
to operate the relay of circuit breaker
Answer
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