1.Arc extinguishing in a sealed container, arc and hot gas are not exposed.
2.Contact gap is small, a few mm to 40mm.
3.Short arcing time, low arc voltage, low arc energy, less contact wear, and more allowable breaks
4.The movable rod has low inertia and is suitable for frequent operation.
5.Small operating mechanism, small size and light weight.
6.Small control power
7.Low noise during operation
8.No fire or explosion hazard during operation
9. the maintenance cycle is long