Electrical Switching Device With A Triple Motion Contact Arrangement

An electrical switching device comprising a contact arrangement having a longitudinal axis and comprising:

• a first contact group with a first contact and a second contact and a second contact group with a third contact and a fourth contact,
• the first contact interacting electrically and mechanically with the third contact and/or the second contact interacting electrically and mechanically with the fourth contact, for closing and opening the contact arrangement,
• at least one mechanical coupling adapted to transmit an actuation force to the second contact group and thereby move the second contact group,
• the at least one mechanical coupling adapted to move the third contact and the fourth contact in such a way that speeds of the third contact and the fourth contact differ along at least a portion of a travel path of the third contact or along at least a portion of a travel path of the fourth contact,
• wherein the at least one mechanical coupling is a linkage having a first kinematic chain and a second kinematic chain, wherein the second kinematic chain is movably connected to the second contact group, and
• wherein the first kinematic chain has at least two levers, with a first lever of the first kinematic chain being rotationally connected to a bearing and fixedly connected to a first lever of the second kinematic chain, and with an end lever of the first kinematic chain is moveably connected to an actuator of the electrical switching device for providing the actuation force transmitted to the second contact group by the mechanical coupling of the contact arrangement according to a predefined transmission ratio and/or speed curve.