JPH0410942U

JPH0410942U -

Info

Publication number: JPH0410942U
Application number: JP5064490U
Authority: JP
Priority date: 1990-05-15
Filing date: 1990-05-15
Publication date: 1992-01-29

Description

[Brief explanation of the drawing]

第１図及び第２図はそれぞれ本考案の実施例の
遮断状態及び投入状態を示す要部断面図、第３図
及び第４図はそれぞれ本考案の他の実施例の遮断
状態及び投入状態を示す要部断面図、第５図及び
第６図はそれぞれ既提案の遮断器の遮断状態及び
投入状態を示す要部断面図である。１……固定主接触子、２……固定側主回路導体
、４……絶縁ノズル、５……昇圧室、６……固定
アーク接触子、７……アーク駆動コイル、８……
アークランナ、１０……パツフアシリンダ、１７
……パツフアピストン、１８……可動アーク接触
子、１９……可動主接触子。 1 and 2 are sectional views of essential parts showing the shutoff state and the closing state of an embodiment of the present invention, respectively, and FIGS. 3 and 4 show the shutoff state and the closing state of another embodiment of the present invention, respectively. FIGS. 5 and 6 are sectional views of essential parts showing the previously proposed circuit breaker in the breaking state and in the closing state, respectively. DESCRIPTION OF SYMBOLS 1... Fixed main contact, 2... Fixed side main circuit conductor, 4... Insulated nozzle, 5... Boost chamber, 6... Fixed arc contact, 7... Arc drive coil, 8...
Arc runner, 10...Pasture cylinder, 17
...Pasture piston, 18...Movable arc contact, 19...Movable main contact.

Claims

[Claims for Utility Model Registration] (1) A pressurization chamber equipped with a nozzle for ejecting gas, a fixed arc contact placed in the pressurization chamber, and a stationary arc contact placed in the pressurization chamber through the nozzle. a movable arc contact displaceable between a closing position and a cutoff position where the nozzle separates from the nozzle and leaves a predetermined insulation distance between the fixed arc contact; and the fixed arc contact. an arc drive coil disposed surrounding the child and excited by an arc current; a puffer mechanism having a puffer cylinder and a puffer piston;
a gas flow path extending in the axial direction within the movable arc contact and having one end opened at the tip of the movable arc contact; the puffer cylinder and puffer piston move relative to each other in conjunction with the movable arc contact; The movable arc contact and the puffer mechanism are coupled to each other so that the movable arc contact and the puffer mechanism are displaceable, and the other end of the gas flow path is connected to the puffer cylinder whose volume is reduced when the movable arc contactor is displaced toward the cutoff position. In the gas circuit breaker communicating with a gas space, the puffer mechanism is configured so that compression of the gas in the puffer cylinder is started after the movable arc contact is separated from the nozzle. Gas circuit breaker. (2) The puffer cylinder includes a first wall portion formed to create a gap between the puffer cylinder and the outer periphery of the puffer piston, and a second wall portion that tightly fits the puffer piston. , the positional relationship between the puffer cylinder and the puffer piston is set such that the puffer piston fits into the inner periphery of the second wall portion of the puffer cylinder after the movable arc contact is detached from the insulating nozzle. The gas circuit breaker according to claim 1, characterized in that: (3) The puffer cylinder has a first wall that is permeable to gas and a second wall that is not permeable to gas.
a wall portion between the puffer cylinder and the puffer piston such that the puffer piston fits into the inner periphery of the second wall portion of the puffer cylinder after the movable arc contact is separated from the insulating nozzle. The gas circuit breaker according to claim 1, wherein a positional relationship is set.