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
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Authors
Dates
2016-12-27—Published
2015-10-26—Filed