Breaker with arc extinguishing device

An arc extinguishing device and circuit breaker technology, which is applied to circuit breaker parts and other directions, can solve problems such as unreasonable exhaust channel design, arc re-ignition, arc breakdown, etc.
CN104835701AActive Publication Date: 2015-08-12XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
Publication Date
2015-08-12

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Abstract

The invention provides a breaker with an arc extinguishing device, so arc backside breakdown can be effectively prevented; the breaker comprises a housing and the arc extinguishing device arranged in the housing; the arc extinguishing device comprises an arc ignition chamber, an explosion chamber and an exhaust channel arranged in sequence in a gas flow direction; the explosion chamber is formed by a plurality of arc extinguishing grid sheets stacked in parallel at intervals, and comprises a gas inlet connected with the arc ignition chamber and a gas outlet connected with the exhaust channel; the exhaust channel is arranged between the explosion chamber gas outlet and a housing outer side wall and used for guiding the gas outside the housing, and provided with an anti-backflow device; the anti-backflow device comprises a shunting device and a diversion device arranged in sequence in the gas flow direction.
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Description

technical field

[0001] The invention relates to a circuit breaker, in particular to a circuit breaker with a built-in arc extinguishing device. Background technique

[0002] refer to Figure 6 , the known circuit breaker generally includes a housing 1' and a static contact 2', a moving contact 3', an electromagnetic release 4', an arc extinguishing device 5' and an operating mechanism 6' disposed in the housing 1', Among them, the movable contact 3' is double-controlled by the operating mechanism 6' and the electromagnetic release 4'. Under the set working current condition, the operating mechanism 6' is used to connect or turn off the static contact 2' and the movable contact. The electrical connection between the contacts 3', when the operating current is greater than the set operating current such as a load short circuit, the electromagnetic release 4' overcomes the elastic force of the operating mechanism 6' and automatically disconnects the static contact 2' and the mov...

Claims

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