MAGNETIC DRIVE OF AUTOMATIC BREAKER Russian patent published in 2015 - IPC H01H33/38 H01H3/28 

FIELD: electricity.

SUBSTANCE: magnetic drive of an automatic circuit breaker contains an armature armature (6) installed with a possibility of movement between the first and second extreme positions corresponding to the closed and opened states of switching of the automatic breaker, a single only electric coil (7) for movement of the armature (6) into the second position when supplying an electric current, the permanent magnet (8) for additional action on the armature (6) towards the second position, the external ferromagnetic yoke (9), which at least partially surrounds the single electric coil (7) and the ferromagnetic core (10) for guiding of the magnetic flux towards the mobile ferromagnetic armature (6) disconnecting the spring unit for continuous preload of the armature (6) towards the first position installed between the named armature (6) and the front side of the electric coil (7) coaxially with them. The disconnecting spring unit, at least, partially is located in the flute (12) formed in the disk-shaped armature (6). The flute sizes correspond to the external shape of the ferromagnetic yoke (9).

EFFECT: creation of the magnetic drive for the automatic breaker the single electric coil of which is combined with the disconnecting spring in a compact structure, providing creation of high driving force.

12 cl, 4 dwg