Switching device

A switching device comprising:

• a frame;
• a load terminal adapted to be connected to a load;
• a first fixed contact member having a first contact area;
• a first movable contact member having a first contact arm provided with a contact area, the first movable contact member being adapted to pivot relative to the frame around a first pivoting axis between a first position in which a projection of the contact area of the first contact arm is located at a distance from a projection of the first contact area of the first fixed contact member on a switch plane perpendicular to the first pivoting axis, and a second position in which the projection of the contact area of the first contact arm overlaps the projection of the first contact area of the first fixed contact member on the switch plane, and the contact area of the first contact arm is in electrically conductive connection with the first contact area of the first fixed contact member, and the first contact arm is in electrically conductive connection with the load terminal;
• and
• a first spring system adapted to press the contact area of the first contact arm against the first contact area of the first fixed contact member in the second position of the first movable contact member in order to provide the electrically conductive connection between the contact area of the first contact arm and the first contact area of the first fixed contact member,
• wherein the switching device comprises a spreader member that is adapted to provide a first intermediate position for the first movable contact member in which the projection of the contact area of the first contact arm overlaps at least partially with the projection of the first contact area of the first fixed contact member on the switch plane while the contact area of the first contact arm is spaced apart from the first contact area of the first fixed contact member,
• wherein the switching device comprises an actuator roll adapted to rotate relative to the frame in a switching on event around a rotation axis from a first position to a second position, wherein during the switching on event the actuator roll cooperates with the first movable contact member through a linkage system for pivoting the first movable contact member from the first position of the first movable contact member to the second position of the first movable contact member,
• wherein the actuator roll is adapted to rotate relative to the frame in a switching off event around the rotation axis from the second position to the first position, wherein during the switching off event the actuator roll cooperates with the first movable contact member through the linkage system for pivoting the first movable contact member from the second position of the first movable contact member to the first position of the first movable contact member,
• wherein the spreader member has a tapered section adapted to provide a slope for the first contact arm such that during the switching off event the tapered section cooperates with the first contact arm for transferring the first contact arm in a lateral direction away from the first fixed contact member, the lateral direction being parallel to the first pivoting axis.