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Switch Gear

Switch Gear
Outdoor switchgear is generally used for voltage beyond

132 kV
33 kV
66 kV
11 kV

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Switch Gear
Which of the following circuit breakers is prefered for EHT applications ?

low oil circuit breaker
air break circuit breaker
bulk oil circuit breaker
Sf6 CB

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Switch Gear
A.C. network analyzer is used to solve problems of

Load flow and short-circuit
Load flow and stability
Load flow, short-circuit and stability
Load flow

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Switch Gear
For which of the following protection from negative sequence currents is provided ?

Generators
Transmission line
Motors
Transformers

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Switch Gear
Interruption of large currents by relay requires

arc suppressing blow out coils
all of these
high speed opening of contacts
wide separation of the opened contacts

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Switch Gear
If the length of the arc in a circuit breaker increases, its resistance

increases
decreases
None of these
remains same

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