AUTOMATIC CIRCUIT BREAKER Russian patent published in 2008 - IPC H01H77/10 

FIELD: instrument making.

SUBSTANCE: invention relates to low-voltage hardware and contains a mobile contact holder with a flexible connection to the lower terminal and arranged in placed in holder clamp with an axis of rotation, a pressing spring, an electro dynamical device of compensating the contact out throw forces, an emergency tripping device and a mechanism of free trip. Also, an additional clamp pivoted to the holder clamp, a roller support, a spring-loaded sectional surface lock and a pusher linked with the free trip are used. The contact holder is pivoted on the additional clamp upper end, the said clamp lower end accommodates the roller support to contact with the lock sectional surface. Axes of rotation of the roller support and holder clamp are aligned. The lock is arranged on the housing to interact with a free trip switching off rack, while the pusher is designed to act on the additional clamp.

EFFECT: higher extreme switching capacity thanks to limitation of current in switching off higher short-circuit currents.

5 dwg