On which of the following routine tests are conducted ?
(a) Oil circuit breakers
(b) Air blast circuit breakers
(c) Minimum oil circuit breakers
(d) All of the above

1 Answer

Answer :

(d) All of the above

Related questions

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Last Answer : (b) Circuit breaker with SF6 gas

Description : The current zero interruption, in oil and air blast circuit breakers, is achieved by (a) lengthening of the gap (b) cooling and blast effect (c) both (a) and (b) (d) deionizing the oil with forced air (e) none of the above

Last Answer : (c) both (a) and (b)

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Last Answer : Air Blast Circuit Breakers Advantages Disadvantages In air blast circuit breakers, compressed air at a pressure of 20-30 kg/cm2 is employed as an arc quenching medium. Air blast circuit breakers ... air blast circuit breaker current chopping problem exists There is a problem of re-striking voltage

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Last Answer : (b) 50 millisecond

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Last Answer : (d) repeated duty

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Last Answer : Isolation switches are provided for separating the disconnected element from the live portion of the system for the purpose of safety

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Last Answer : (a) current carrying contacts called electrodes

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Last Answer : On which of the following routine tests are conducted ?(a) Oil circuit breakers(b) Air blast circuit breakers(c) Minimum oil circuit breakers(d) All of the above

Description : The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to (a) lubricate the contacts (b) insulate the contacts from switch body (c) extinguish the arc (d) all of the above (e) none of the above

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