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US 9,012,800 B2Granted
Gas circuit breaker
AssigneeMitsubishi Electric Corporation
InventorsToru Yamashita, Daisuke Yoshida, Katsuhiko Horinouchi, Tatsuya Hayashi
Life of this patent
Estimating the term…
Abstract
A gas circuit breaker is provided, avoiding change in the position of a cover member and without weakening of the blow of gas to the arc in an arc discharge cavity even when a surface of the cover member in contact with the arc discharge cavity is damaged. The gas circuit breaker includes a contact ring, a holder attached to the contact ring, and extending to a path of arc-extinguishing gas that extinguishes an arc, and an electrically insulative cover member attached to the holder.
Claims16
A gas circuit breaker comprising:
- a stationary contact,
- a holder attached to said stationary contact, and extending towards a path of arc-extinguishing gas extinguishing an arc, and
- an electrically insulative cover member attached to said holder,
- wherein said cover member includes a first member located at a side in proximity to a contact region between the arc-extinguishing gas and arc, and a second member located at a side farther away from said contact region, said first member and said second member being attached to said holder integrally.
1 more element
A gas circuit breaker comprising:
- an annular stationary contact having an axis at its center,
- a holder attached to said stationary contact, and extending towards a path of arc-extinguishing gas extinguishing an arc,
- an electrically insulative cover member attached to said holder, said cover member covering a surface of said holder that faces said axis;
- and
- an insulating member that is electrically insulative, arranged to face said cover member with said path therebetween.
2 more elements
Dependencies are inferred from the claim text.