Circuit breaker

A technology of circuit breakers and arc partitions, which is applied in circuit breaker parts and other directions to suppress the phenomenon of rear breakdown, improve the breaking capacity, and solve the phenomenon of rear breakdown.

Active Publication Date: 2018-05-04
HANGZHOU TAIMU ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the phenomenon of backside breakdown is more significant in circuit breakers using grid arc extinguishing technology

Method used

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Embodiment Construction

[0027] The embodiment of the invention discloses a circuit breaker to solve the problems of occurrence of breakdown phenomenon at the back of the circuit breaker, low breaking capacity of the circuit breaker and the like.

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] see Figure 1-4 , figure 1 It is a schematic diagram of the partial cross-sectional structure of the base of the circuit breaker provided by the embodiment of the present invention, figure 2 It is a schematic diagram of the partia...

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PUM

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Abstract

The invention discloses a circuit breaker. The circuit breaker comprises a base, a cover plate, an arc extinguishing device and a contact system, wherein the arc extinguishing device and the contact system are arranged in a shell comprising the base and the cover plate, the arc extinguishing device comprises an arc extinguishing chamber and an arc isolation wall, the arc isolation wall is made ofa gas generation material and comprises a front surface and a rear surface, a diversion groove is formed in the rear surface of the arc isolation wall and is corresponding to an arc inlet side of thearc extinguishing chamber, and a diversion groove boss is arranged on the diversion groove and is used for guiding gas flow and cooling the gas flow. In the circuit breaker, the energy of the arc andthe space of the circuit breaker are effectively utilized, hot gas flowing out of regions of the contact system and the arc extinguishing device is returned to a region of the contact system through agas flow through groove in the back surface of the circuit breaker, a back breakdown phenomenon is prevented, and the current-limiting and breaking capability of the circuit breaker are improved.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, more specifically, to a circuit breaker. Background technique [0002] With the rapid development of the national economy, the capacity and scale of the power distribution system continue to expand, and the level of short-circuit current also increases. Short-circuit faults pose a very large potential threat to the power system and the safety of personnel and property. In addition, people have put forward higher requirements for power quality, security and reliability of power supply. The breaking of the fault current by the circuit breaker mainly depends on the grid arc extinguishing technology, and whether the arc can quickly enter the grid and be effectively cut is greatly affected by the magnetic field and air flow field in the arc extinguishing chamber. In addition, the phenomenon of backside breakdown is more significant in circuit breakers using grid arc extinguishing tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 黄燮云肖朋郑伟建周文
Owner HANGZHOU TAIMU ELECTRICAL
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