Switching device

A switching device comprising a frame, in which an actuator adapted to rotate a main shaft of the switching device and rotatable around an axis of rotation, and spring means are installed, 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 spring means comprising one or more working springs each comprising a first end supported to the frame, and a second end, the spring means being adapted to rotate the actuator, when the actuator is between the 0 position and the I position, towards the 0 position or the I position depending on which side of said first dead point the actuator is, wherein 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, said second direction being opposite relative to said first direction.