Gas circuit breaker
AssigneeMitsubishi Electric Corporation
InventorsKatsuhiko Horinouchi, Motohiro Sato
Life of this patent
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Abstract
An arc extinguishing device of a gas circuit breaker includes: an arc chamber in which an arc generated between a movable electrode and a fixed electrode is formed; a heat puffer chamber disposed so as to surround the arc chamber; a blow port in which the arc chamber communicates with the heat puffer chamber in the circumferential direction of the arc chamber; hydrogen absorbents which are disposed on an inner wall of a pressure chamber; an exhaust port which passes to the outside of an arc extinguishing chamber; and a hydrogen absorbent disposed at a position surrounding the movable electrode. Deterioration of insulation due to a product formed by decomposition of arc extinguishing gas by the arc during a contact opening operation can be suppressed.
Claims10
A gas circuit breaker comprising:
- a fixed electrode;
- a movable electrode capable of being connected to and disconnected from said fixed electrode;
- an arc chamber in which an arc generated when said movable electrode is separated from said fixed electrode is formed;
- a puffer chamber in which arc extinguishing gas to be sent to said arc chamber is stored;
- a nozzle which guides the arc extinguishing gas from said puffer chamber to said arc chamber;
- and
- a hydrogen absorbent which absorbs at least one of a hydrogen atom, a hydrogen ion, and a hydrogen molecule and is disposed in a flow path of heated gas discharged from said arc chamber during the generation of the arc,
- wherein the hydrogen absorbent is disposed at a position facing an opening portion of the arc chamber.
Dependencies are inferred from the claim text.