A switching device having a frame, in which an actuator adapted to rotate a main shaft of the switching device and rotatable around an axis of rotation, the actuator having a 0 position, an I position and a first dead point between the 0 position and the I position, the I position being located by a given angle (α6) in a first direction relative to the 0 position. The actuator also has a testing position, the testing position being located by a predetermined angle (β6) in a second direction relative to the 0 position, the second direction being opposite relative to the first direction.