a switching device assembly has an encapsulation housing . movable active conductors are located inside the encapsulation housing . a drive unit with a gearbox is located outside of the encapsulation housing . the gearbox is part of a kinematic chain for moving an active conductor . the kinematic chain penetrates the encapsulation housing . in order to reverse the direction of a movement of the gearbox that can be transmitted , the gearbox is turned around a reversing axis and coupled into the kinematic chain .