ELECTROMAGNETIC RELEASE MECHANISM OF AUTOMATIC CIRCUIT BREAKER Russian patent published in 2020 - IPC H01F7/121 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, particularly to electrical apparatus, and can be used in designing automatic circuit breakers, current relays and other automation devices. Electromagnetic release mechanism of automatic circuit breaker comprises magnetic conductor, comprising two U-shaped brackets with facing each other ends of side elements, which are magnetic conductor poles, wherein one of the brackets is configured to be fixed on the current-conducting bus of the automatic circuit breaker and is fixed, and the other one is connected to the return spring and is installed with the possibility of movement relative to the other bracket by the working stroke distance h under the electromagnetic flux force acting on the poles at the short circuit current flowing along the busbar, one of U-shaped brackets of magnetic conductor forms receiving space for free entry into it of poles of other U-shaped bracket, wherein distance between lateral inner surfaces of bracket forming receiving space, and external side surfaces of bracket entering receiving space, is selected from condition of free movement of poles relative to each other without grinding.

EFFECT: technical result of claimed invention is faster operation and reduced costs for designing and manufacturing of automatic circuit breakers.

1 cl, 8 dwg