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Switch Gear

Switch Gear
The operating time of a circuit breaker is

0.05 sec
0.001 sec
0.2 sec
0.002 sec

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Switch Gear
Outdoor switchgear is generally used for voltage beyond

132 kV
33 kV
11 kV
66 kV

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Switch Gear
A circuit breaker is rated as 1500 A, 1000 MVA, 33 kv, 3-second , 3- phase oil circuit breaker. The rated normal current is

1500/√3 A
750 A
1500 A
None of these

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Switch Gear
Which of the following CB's is generally used in railways applications ?

low oil circuit breaker
air break circuit breaker
sf 6 circuit breaker
bulk oil circuit breaker

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Switch Gear
series reactors should have

low resistance
high resistance
high impedance
low impedance

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Switch Gear
When a fault occur in a power system, the circuit breaker

is opened by remote control
opens automatically
is opened manually
None of these

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