Features for different types of circuit breakers

Factor Oil Breaker Air Breaker Vacuum/SF6
Safety In oil breaker circuit risk of explosion and fire due to increase in pressure during multiple operations In air breaker emission of hot air and ionized gas to surroundings In Vacuum there is no risk of explosion
Size It is quite Large in size. It is medium in size It is smaller in size
Maintenance It needs regular oil replacement It needs replacement of arcing contacts It needs minimum lubrication for control device
Environmental Factor Humidity and dust in the internal properties Atmosphere can change and affect the dielectric Since sealed, no effect due to environment
Endurance Below average Average Excellent

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