SWITCHING DEVICE WITH THE ARC EXTINCTION WITH THE HELP OF PERMANENT MAGNETS Russian patent published in 2017 - IPC H01H9/44 

FIELD: electricity.

SUBSTANCE: switching device comprises at least one contact point and an associated arc blowing device. The arc blowing device comprises at least one blast magnet to create a magnetic blast field. The blast field has the form that the electric arc, which is formed when the contact point is opened, is blown out of the contact place. The blast field contains the first and second regions of the magnetic field, located side by side. The lines of force of the magnetic field of the first region are oriented in the opposite direction with respect to the lines of force of the magnetic field of the second region. The blast field further comprises a transition region connecting the first and second regions of the magnetic field to each other. The direction of the lines of force of the magnetic field in the transition region starting and leaving the first region of the magnetic field and the second region of the magnetic field is aligned towards the contact point in such a way that the electric arc is within the transition region, depending on the direction of the current, starting from the contact point, is directed either to the first or second region of the magnetic field. But in both cases it is blown in one direction from the contact place. Therefore, only one arc suppression device is required for arc extinguishing.

EFFECT: increasing the reliability of arc suppression with simplified design.

15 cl, 11 dwg