AUTOMATIC PNEUMATIC CIRCUIT BREAKER Russian patent published in 2011 - IPC H01H33/915 

FIELD: electricity.

SUBSTANCE: automatic pneumatic circuit breaker comprises rupture part (2), placed into vessel (1), filled with insulating gas. This rupture part (2) includes at least main contact elements (3) and (6) at fixed and movable contact sections, arched contact elements (4) and (7) on fixed and movable contact sections, blowing device, compressing insulating gas, and insulating nozzle (10), through which insulating gas is sent to arc produced between arc contacts (4) and (7). Insulating gas blown at arc so that it obtains high temperature arrives via cylindrical shaft (11). This shaft (11) comprises tubular element (11a), at one end of which there is an arc contact element (7) installed, and end element (11b), at one side joined, in detachable manner and along joint (11d), with tubular element (11a), and at the other side - with stem (12), joined to manual drive.

EFFECT: durable operation, improved cost-effectiveness, higher mechanical strength and speed of movements related to interruption of circuit.

4 cl, 3 dwg