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Circuit breaker

A circuit breaker and travel path technology, applied to circuit breaker parts and other directions, can solve the problems of reduced arc extinguishing effect of gas blowing and easy gas flow, and achieve the effects of improving short-circuit capacity, reducing energy, and reducing burning time

Pending Publication Date: 2022-07-08
XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the dynamic and static contact areas of circuit breakers are often open. When a large amount of gas is generated in the dynamic and static contact areas, the gas can easily flow to other positions in the inner cavity of the circuit breaker, resulting in gas blowing. The effectiveness of arc extinguishing is reduced

Method used

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Embodiment Construction

[0025] To further illustrate the various embodiments, the present invention is provided with the accompanying drawings. These drawings are a part of the disclosure of the present invention, which are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant description of the specification to explain the operation principles of the embodiments. With reference to these contents, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. Components in the figures are not drawn to scale, and similar component symbols are often used to represent similar components.

[0026] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0027] see Figure 1-5 As shown, as a preferred embodiment of the present invention, a circuit breaker is provided, including a base 1, a mechanism 2, a moving contact 3, a static contact 4 and an...

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Abstract

The invention relates to a circuit breaker which comprises a base, a mechanism, a contact assembly and an arc extinguish chamber, the arc extinguish chamber is arranged on one side of the contact assembly, the contact assembly comprises a static contact with a static contact point and a moving contact with a moving contact point, and the moving contact has a moving stroke for achieving connection or disconnection of the circuit breaker relative to the static contact. The mechanism is in linkage connection with a moving contact, a gas traveling path of gas blast arc extinguishing is formed from the contact assembly to the arc extinguishing chamber, a gas baffle plate moving along with the movement of the moving contact is attached to the moving contact or the mechanism, and when the moving contact is disconnected relative to a static contact, the gas baffle plate moves along with the movement of the moving contact. The gas baffle blocks the upstream of the gas traveling path along with the moving stroke of the moving contact, so that the vast majority of gas generated by the electric arc between the moving contact and the static contact can move towards the arc extinguish chamber, and the electric arc is accelerated to enter the arc extinguish chamber.

Description

technical field [0001] The invention relates to the field of low-voltage switchgear, in particular to the improvement of the arc extinguishing function. Background technique [0002] When the moving and static contacts of the circuit breaker are disconnected, the initial distance between the moving contact and the static contact is small, and the electric field strength is high, an arc will be generated between the moving and static contacts, and the arc will not be extinguished. Then the circuit cannot be completely disconnected, and the temperature of the arc is very high. The high-temperature arc will burn out the equipment and cause serious accidents. In order to extinguish the arc in time, the arc extinguishing system of the circuit breaker is particularly important. Among them, the gas blowing arc extinguishing is a very effective auxiliary arc extinguishing method. It uses the arc to ablate the gas-producing material to generate a large amount of gas, and the gas push...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 邹航林桌勇周燕海赖森林
Owner XIAMEN HONGFA ELECTRICAL SAFETY & CONTROLS CO LTD
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