Gas pressure circuit interrupter
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKoji Ibuki, Yoshihiro Ueda, Masami Kii
Life of this patent
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Abstract
A circuit interrupter comprises a pair of contacts in a container filled with a gas for extinction; an insulation nozzle around the contacts to form an arc chamber; a gas chamber which is connected to the arc chamber under departing the contacts. The gas pressure in the arc chamber and the gas chamber is increased by the energy of the arc generated at the departing the contacts. When the arc current is large, the flow-out of the gas from the arc chamber and the gas chamber is decreased by the arc whereas the high pressure gas in the arc chamber and the gas chamber is discharged through the insulation nozzle into the container at the time decreasing the arc current near zero whereby the arc is interrupted by the gas flow discharged.
Claims5
A circuit interrupter comprising:
- a container filled with a gas for extinction;
- a fixed contact in said container;
- a movable contact normally connected to said fixed contact;
- an insulation nozzle disposed around said contacts, said insulation nozzle including an enlarged portion which forms a unitary coextensive arc chamber and gas chamber;
- and
- means for moving said movable contact to destroy said connection between said fixed and movable contacts,
- whereby an arc is formed and the cool gas in said gas chamber easily mixes with and cools the hot gas in said arc chamber so that said arc may be easily extinguished.
A circuit interrupter comprising:
- a container filled with gas for extinction;
- a fixed contact in said container, said fixed contact being a pipe type contact having both ends open;
- an insulation nozzle disposed around one end of said fixed contact and defining an arc chamber;
- a gas chamber connected to the other of said ends of said fixed contact, said gas chamber communicating with said arc chamber only through said nozzle;
- a movable contact extending through said insulation nozzle and adapted to be received within said one end;
- and
- means to move said movable contact out of connection with said fixed contact whereby an arc is formed in said arc chamber, the flow of gas from said gas chamber to said arc chamber being prevented by said arc when the arc current is large.
Dependencies are inferred from the claim text.