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A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is
None of these
1500 A
1500/√3 A
750 A
None of these
1500 A
1500/√3 A
750 A
Answer
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Related Question
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The operating time of a circuit breaker is
0.001 sec
0.002 sec
0.05 sec
0.2 sec
0.001 sec
0.002 sec
0.05 sec
0.2 sec
Answer
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Air blast circuit breakers for 400 kV power system are designed to operate in
0.5 sec
100 micro-second
50 milli-second
0.1 sec
0.5 sec
100 micro-second
50 milli-second
0.1 sec
Answer
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The voltage appearing across the contacts after opening of the circuit breaker is called
arc voltage
surge voltage
recovery voltage
operating voltage
arc voltage
surge voltage
recovery voltage
operating voltage
Answer
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The power loss is an important factor for the design of
feeder
transmission line
generator
motor
feeder
transmission line
generator
motor
Answer
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An overcurrent relay having current settling of 125% is connected to a supply circuit through a current transformer of 400/5 A. The pick-up current is
6.25 A
25 A
12.5 A
3.125 A
6.25 A
25 A
12.5 A
3.125 A
Answer
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