Patent ID: 8686814

Claim:
An electric switching having with an ultra-fast actuating mechanism for opening electrical contacts, said device comprising: an electrodynamic trip unit comprising a propulsion coil associated with a conducting disk, a stationary electrical contact for collaborating in a closed position with a movable electrical contact, said movable electrical contact being movable to an open position by propulsion of the conducting disk when the propulsion coil is supplied with power, a biasing device for generating a closing force to keep said electrical contacts in a closed position, latching means for maintaining the movable contact in the open position, said means comprising a fixed magnetic yoke having an attraction coil for providing an attraction force to a movable magnetic armature, said armature for being driven in movement by the movable contact to come into contact with the fixed magnetic yoke, wherein the movable contact is supported by a contact-bearing support comprising drive means for collaborating with the magnetic movable armature when movement of the movable contact takes place, thereby bringing said drive means into contact with the magnetic movable armature resulting in movement of the magnetic movable armature in the direction of the fixed magnetic yoke.