Patent ID: 6031437
Filing Date: 2000-02-29
Classification: H01H

Abstract:
A switching apparatus having an electromagnetic command device comprising:a magnetic circuit having:a main circuit polarized by a permanent magnet and linked to a depolarizing coil, and having at least two air gaps in series on a magnetic flux path generated by the permanent magnet; anda movable holder integral with a movable lever subject to a return spring and having at least first and second magnetic parts respectively disposed within portions of the movable holder and configured to close the at least two air gaps when the main circuit and the movable holder are joined together and are crossed by said magnetic flux path created by the permanent magnet, thereby performing a locking function and creating a multiplication of the locking forces, with an unlocking function being provided by the depolarization coil and a counter-flux from which crosses the magnetic circuit and the at least two air gaps,wherein the moveable lever acts directly or indirectly on at least one disconnecting pole.