The main advantages of SF6 circuit breakers are as follows:
(1) Good breaking performance, large breaking current, short arcing time, and no re-ignition overvoltage.
(2) The number of switches allowed is large, which is suitable for frequent operations and has a long maintenance cycle.
(3) The structure is simple, and the number of fractures and the number of insulating struts are reduced due to the high fracture resistance of the arc chute.
(4) Compact structure, small volume and small footprint.
(5) SF6 is an inert gas and has no fire hazard.
The main disadvantage of SF6 circuit breaker is that it requires high processing accuracy, good sealing performance, strict testing requirements and high price.