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Circuit breaker

A technology for circuit breakers and arc extinguishing grids, applied to high-voltage air circuit breakers, circuits, electrical components, etc., can solve problems such as lack of fixation, assembly errors, and easy shaking of arc extinguishing covers, so as to improve firmness and good The effect of the filter effect

Active Publication Date: 2016-11-09
浙江精开电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for the above-mentioned circuit breakers and most of the existing circuit breakers, the arc chute is installed in the housing. During the process, there will be some assembly errors more or less, which will cause the arc chute to be unable to be assembled into the shell, or there is a certain assembly gap between the arc chute and the shell, and the arc chute is easy to shake in the shell, which is unavoidable. to a stable

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0037] Embodiment 1: A circuit breaker, such as figure 1 As shown, it includes a housing 1, which is provided with a mounting groove and an arc extinguishing cover 2 placed in the mounting groove. The shape of the mounting groove is a cuboid, and the mounting groove can be used to install and place the arc extinguishing cover 2 It includes a cover body 201 and first arc extinguishing grid pieces 202 and second arc extinguishing grid pieces 203 arranged at intervals in the cover body 201. The shape of the cover body 201 is a cuboid, and the end surface of the cover body 201 along its own height direction An insertion port is opened, and the first arc extinguishing grid 202 and the second arc extinguishing grid 203 are inserted into the cover body 201 through the insertion port, and the upper and lower surfaces of the cover body 201 are provided with riveting holes penetrating the inside and outside of the cover body 201. The first arc extinguishing grid 202 and the second arc e...

Embodiment 2

[0044] Embodiment 2: A circuit breaker, such as Figure 5 to Figure 7 As shown, the difference from Embodiment 1 is that the filter cover 3 includes a U-shaped first filter screen plate 301, a connecting plate 302 and a sealing plate 15 for sealing the air inlet channel 4, and the first filter screen plate 301 The lower side of the lower side of the connecting plate 302 is fixedly connected to the left side of the connecting plate 302, and the lower side of the sealing plate 15 is connected to the right side of the connecting plate 302 through a rotating shaft. The filter cover 3 is installed on the air inlet passage 4, the gas in the air inlet passage 4 passes through the first filter screen plate 301 and the sealing plate 15 in sequence, and when the circuit breaker is in operation, the sealing plate 15 is rotated toward the connecting plate 302, Thus, the air inlet duct is opened, and the gas can enter the cavity 8 normally. The first filter screen plate 301 plays a role in...

Embodiment 3

[0045]Embodiment 3: A circuit breaker, the difference from Embodiment 2 is that in this embodiment, the driving part that drives the rotating shaft to rotate is a small driving motor, the output shaft of the small driving motor is fixedly connected to the rotating shaft, and the small driving motor works , to drive the rotating shaft to rotate, through the setting of a small drive motor, the automatic rotation of the sealing plate 15 is realized, thereby realizing the automatic opening and closing of the air inlet channel 4.

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Abstract

The invention discloses a circuit breaker. With the circuit breaker, problems of easy loosening and unstable fixation of arc-extinguishing cover fixation in the housing in the prior art can be solved. The circuit breaker is characterized in that the breaker comprises a housing; a mounting groove and an arc-extinguishing cover arranged in the mounting groove are arranged in the housing. The arc-extinguishing cover includes a cover body, a first arc-extinguishing grid plate and a second arc-extinguishing grid plate, wherein the grid plates are distributed in the cover body at intervals. Elastic abutting plates abutted against the inner walls of the mounting groove are arranged at the two opposite sides of the cover body and enable the arc-extinguishing cover to be abutted against and fixed in the mounting groove elastically, so that loosening and unstable fixation between the arc-extinguishing cover and the mounting groove can be avoided. The first arc-extinguishing grid plate and the second arc-extinguishing grid plate are distributed in the cover body at an interval and crossed arc extinguishing is carried out on the arc; and the breaking index is high, so that the arc-extinguishing effect of the arc-extinguishing cover is optimized.

Description

technical field [0001] The present invention relates to an electrical switch, and more particularly, to a circuit breaker. Background technique [0002] Arc is a kind of gas discharge phenomenon. The instantaneous spark generated by the current passing through some insulating medium (such as air). When the current is disconnected by the switching device, if the circuit voltage is not lower than 10-20 volts, the current is not less than 80-100mA , There will be an arc between the contacts of the electrical appliance, and the arc will have a great impact on the safe operation of the power supply and distribution system; Guided into the arc extinguishing cover, the arc extinguishing grid in the arc extinguishing cover can effectively cut off the arc to achieve the effect of arc extinguishing. [0003] For example, in a Chinese patent document with the patent application number "201521115441.2", a residual current leakage circuit breaker is recorded, including a housing, an ope...

Claims

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Application Information

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IPC IPC(8): H01H33/08H01H33/02H01H9/02
CPCH01H9/02H01H33/02H01H33/08
Inventor 南继泽
Owner 浙江精开电气有限公司
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