COLUMN GAS-FILLED CIRCUIT BREAKER Russian patent published in 2013 - IPC H01H33/53 

FIELD: electricity.

SUBSTANCE: column gas-filled circuit-breaker contains hollow base insulator, the second insulator, arc suppressor placed inside the second insulator, drive connected to arc suppressor by insulating pull-rod passing inside hollow base insulator, exhaust pipe placed in the same insulator and electric heater under its base. The second insulator is fixed at hollow base insulator by means of flanges with current lead located in-between them to arc suppressor. The other current lead to arc suppressor is fixed at the upper flange of the second insulator. Inside the second insulator there is the second exhaust pipe located in-between current leads around arc suppressor. Parts of current leads inside insulators are made with slots and/or channels.

EFFECT: preventing of unacceptable decrease in SF6 density at low temperatures without necessity to fill the circuit breaker with excessive quantity of gas, improving switching capacity and operational reliability.

3 dwg