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The advantages of a circuit breaker are:

they are smaller in size than fuses

better versions may have electronic trips so they can adjust trip curve to suite circuit design

easier for end user to reset (no touching live parts)

no waiting to reset (as with fuses - spare must be found)

no cost associated with resetting unlike cost of replacement fuses

easier when ground fault protection is needed

The disadvantages of a circuit breaker are:

they are more expensive than fused switches

when a circuit breaker trips, you lose all power (with fuses you only lose that phase)

harder to coordinate fault selectivity

harder and more costly to obtain high short circuit interrupting capacities

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What gas is used in vacuum circuit breaker to quench the arc?

Sulpur Hexa-Fluoride(SF6) is the gas used to quench the arc in a Vacuum circuit breaker.SF6 is a inert gas and is in-organic,colorless,odorless,non-flammable gas used as an outstanding electrical insolater.AnswerAs its name suggests, the arc is extinguished within a vacuum. No gas is involved.


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Related Questions

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What gas is used in vacuum circuit breaker to quench the arc?

Sulpur Hexa-Fluoride(SF6) is the gas used to quench the arc in a Vacuum circuit breaker.SF6 is a inert gas and is in-organic,colorless,odorless,non-flammable gas used as an outstanding electrical insolater.AnswerAs its name suggests, the arc is extinguished within a vacuum. No gas is involved.