CIRCUIT BREAKER ELECTROMAGNETIC DRIVE Russian patent published in 2016 - IPC H01H33/42 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to circuit breakers and their drives. Invention aims at reducing of stray currents effect on quick-acting electromagnet drive operation. Technical result is achieved by using circuit breaker electromagnetic drive, containing upper magnetic conductor, magnetic conductor-guide, armature with holding belt, hard-magnetic yoke, disconnecting spring and electromagnet coil, also non-magnetic current conductive bushing, installed coaxially to hard-magnetic yoke and equidistant to coil inner surface, in thrust between upper magnetic conductor and magnetic core-guide, wherein non-magnetic conductive bushing inner surface has secured gap with armature, and its height is made for 1.5-2 of armature travel.

EFFECT: technical result is improvement of drive reliability by reducing lock zone mirror erosion and hard-magnetic yoke demagnetization.

4 cl, 8 dwg