HIGH-VOLTAGE CIRCUIT BREAKER Russian patent published in 2017 - IPC H01H33/42 

FIELD: electrical engineering.

SUBSTANCE: field of application: electrical engineering. Circuit breaker pole contains at least one isolated from earth arc suppressor positioned inside the insulating shell with top and bottom flanges and containing movable arc receiving and main contacts with insulating gap between them, drive, insulating rod, connecting drive with movable contacts, and lever mechanism, connecting and ensuring longitudinal-counter movement of both movable contacts. Upon this insulating gap is increased at least by 1.06 times in comparison with required according to electric strength for circuit breaker with this class of voltage, and there is fixed insulating support structure in the increased gap between contacts, which has two fixed contacts electrically connected to each other, forming with movable contacts of arc suppressor two insulation arc control gaps when disconnecting circuit breaker. Herewith the said isolating support structure can be installed on the above mentioned lower or upper flang. Said circuit breaker version with two arc-quenching gaps at relatively simple design radically increases arc-quenching capacity of the circuit breaker and value of breaking current.

EFFECT: technical result is improvement of disconnecting capability of the circuit breaker.

3 cl, 1 dwg