Switchgear
AssigneeMitsubishi Electric Corporation
InventorsKatsushi Nakada, Katsuhiko Horinouchi
Life of this patent
Estimating the term…
Abstract
A switchgear includes a fixed contactor provided in a tank filled with insulating gas, and a movable contactor provided in the tank, the movable contactor being connected to and disconnected from the fixed contactor so as to move forward and backward. The switchgear includes an arc extinction member including a surrounding portion which is slidably connected to the outer circumferential surface of the movable contactor halfway in a movement range from a close contact state to an open contact state and is formed so as to surround an arc space portion in a sealed manner, the surrounding portion being formed with a through hole through which the arc space communicates with the outside of the arc space.
Claims20
A switchgear comprising:
- a fixed contactor provided in a tank filled with insulating gas;
- a movable contactor provided in said tank, said movable contactor being connected to and disconnected from said fixed contactor so as to move forward and backward;
- and
- an arc extinction member including a surrounding portion which is slidably connected to the outer circumferential surface of said movable contactor halfway in a movement range from a close contact state to an open contact state, and is formed so as to surround an arc space portion in a sealed manner, the surrounding portion being formed with a through hole through which the arc space communicates with the inside of said tank filled with insulating gas.
A switchgear comprising:
- a fixed contactor provided in a tank filled with insulating gas;
- a movable contactor provided in said tank, said movable contactor being connected to and disconnected from said fixed contactor so as to move forward and backward;
- an arc extinction member having a surrounding portion which is slidably connected to the outer circumferential surface of said movable contactor halfway in a movement range from a close contact state to an open contact state, and is formed so as to surround an arc space portion in a sealed manner;
- and
- an arc extinguishing member provided in a central portion of said movable contactor, said arc extinguishing member being formed with a center hole axially formed in a central portion of said arc extinguishing member,
- wherein the arc space communicates with the inside of said tank filled with insulating gas through said center hole.
Dependencies are inferred from the claim text.