ELECTROMAGNETIC DRIVE FOR VACUUM CIRCUIT BREAKER Russian patent published in 2009 - IPC H01H33/66 

FIELD: electricity.

SUBSTANCE: invention relates to electrical engineering, to electromagnetic drives of vacuum high-voltage circuit breakers. The electromagnetic drive is made from an imbricated core, actuating and tripping coils, armature and permanent magnets. The electromagnetic drive is provided with two magnetic latches, which hold the armature in its two extreme positions due to the effect of permanent magnets. The armature has frontal working gaps: one near the left end, and the other near the right end. The electromagnetic drive has several galvanically unconnected tripping coils with nominal power of not more than 0.33 kW each. Near one end in the zone of the tripping coil there two more lateral working gaps. Magnetic conductance of the lateral working gaps is several times more than magnetic conductance of the frontal working gap.

EFFECT: reduction of power consumed by the tripping coils several times; exclusion of pre-charged capacitors when tripping the drive.

3 dwg