Patent ID: 8723627

Claim:
An electrical cut-off device ( 1 ) with high electrodynamic resistance provided with a control module ( 2 ) associated with at least one cut-off module ( 3 ) corresponding to a phase of an electrical network, the cut-off module comprising: at least two fixed contacts ( 4 ) and at least one moving contact ( 5 ), the moving contact ( 5 ) being coupled with an actuator mechanism ( 6 ) controlled by the control module ( 2 ) so as to be movable between at least one switched-off position, in which the moving contact is spaced from the fixed contacts and the electrical circuit is open, and a switched-on position, in which the moving contact is resting on the fixed contacts and the electrical circuit is closed, wherein the fixed contacts ( 4 ) and the moving contact ( 5 ) are arranged according to an architecture forming a current loop which has a symmetrical omega shape with respect to a centerline (A) so that compensation forces (Fc) (Laplace electromagnetic forces) generated by the circulation of the current (I) in the current loop, when the cut-off module ( 3 ) is in the switched-on position, are oriented in a direction flowing from an inside toward an outside of the current loop, and the moving contact ( 5 ) is arranged to move inside of the current loop, from its switched-off position to its switched-on position, in a direction of a displacement forces (Fd) that is identical to the direction of the compensation forces (Fc) which is in a direction from the inside toward the outside of the current loop, while the direction of the compensation forces (Fc) and of the displacement forces (Fd) of the moving contact ( 5 ) are merged at the centerline (A) of the current loop.