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Molded case circuit breaker with zero flashover device

A technology of molded case circuit breaker and circuit breaker body, applied in circuit breaker parts and other directions, can solve the problems of easy arc backflow and small gap, and achieve the effects of prolonging service life, increasing effectiveness, and increasing cooling area

Pending Publication Date: 2021-12-03
ZHEJIANG JUBANG ELECTRICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the gap between the baffle plate and the arc extinguishing grid is small and the arc is easy to flow back in the prior art, so as to provide a zero flashover device that is not easy to flow back the arc molded case circuit breaker

Method used

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  • Molded case circuit breaker with zero flashover device
  • Molded case circuit breaker with zero flashover device
  • Molded case circuit breaker with zero flashover device

Examples

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Embodiment

[0038] This embodiment provides a molded case circuit breaker with a zero flashover device, such as figure 1 and 2 As shown, it includes a circuit breaker body 1 , an arc extinguishing grid assembly 2 , a zero flashover assembly 3 and an arc extinguishing cover 6 .

[0039] Circuit breaker body 1, such as Figure 1-6As shown, it has an arc extinguishing grid assembly 2 suitable for arc extinguishing and a zero flashover assembly 3 suitable for absorbing residual arc. The arc extinguishing grid assembly 2 includes 1 A plurality of first arc extinguishing grids 4 and a plurality of second arc extinguishing grids 5 arranged in sequence in the longitudinal direction, the plurality of first arc extinguishing grids 4 and the plurality of second arc extinguishing grids 5 are staggered forward and backward It is provided that the second arc extinguishing grid 5 has a first flat plate portion 52, and a sloping plate portion 53 provided on the first flat plate portion 52 close to the...

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PUM

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Abstract

A molded case circuit breaker with a zero-flashover device provided by the present invention comprises a circuit breaker body, an arc extinguishing grid sheet assembly and a zero-flashover assembly, a baffle plate is arranged on one side of an exhaust port of the arc extinguishing grid sheet assembly, and an exhaust hole suitable for guiding an electric arc to be discharged to the zero-flashover assembly is formed in a part, adjacent to the baffle plate, of the arc extinguishing grid sheet assembly. Therefore, after being blocked by the baffle plate, gas ejected from the exhaust port of the arc extinguishing grid plate assembly can be upwards guided to the zero-flashover assembly through the exhaust hole in the rear side of the arc extinguishing grid plate assembly for secondary arc extinguishing. Therefore, the situation that in the prior art, after being blocked by a baffle, gas flows back to the front side of the arc extinguishing grid piece assembly, and consequently a contact mechanism is damaged is avoided, the service life of the circuit breaker is prolonged, the length size of the circuit breaker is not changed through the improvement, and the requirement for miniaturization of the molded case circuit breaker can be met.

Description

technical field [0001] The invention relates to the technical field of circuit breakers, in particular to a molded case circuit breaker with a zero flashover device. Background technique [0002] Molded case circuit breaker, also known as device circuit breaker, all its parts are sealed in the plastic case, and the auxiliary contacts, shunt release, etc. are mostly designed with splicing modularization, which can be easily installed and maintained . [0003] Existing molded case circuit breakers, such as Figure 8 As shown, it includes the arc extinguishing chamber 01 and the zero arc chamber 02. There are multiple arc extinguishing grids 011 in the arc extinguishing chamber. There is an arc-absorbing net 021 for absorbing the remaining arc inside, and a baffle 03 is provided on the rear side of the arc extinguishing grid 011. When the airflow with arc ejected from the arc extinguishing chamber 01 is blocked by the baffle 03 , the arc will move upward along the baffle plat...

Claims

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Application Information

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IPC IPC(8): H01H73/18
CPCH01H73/18
Inventor 欧阳海军曾谊童伟李德志李云丹连旭峰
Owner ZHEJIANG JUBANG ELECTRICAL
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