Switchgear for short circuit arc extinguishing for low voltage, medium voltage or high voltage

A switchgear, medium voltage technology, applied in electrical switches, closed switches, explosion switches, etc., can solve the problems of failure and loss of short-circuit devices, and achieve the effects of preventing rebound, increasing the pressure of the cylinder, and increasing the range of shape selection.

Active Publication Date: 2018-10-23
710TH RES INST OF CHINA SHIPBUILDING IND CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Both the moving contact and the static contact of the above-mentioned patent adopt a conical complementary structure. Although the springback of the static contact can be prevented through its structural characteristics, if the force of the moving contact is too large, it may still rebound. If the bomb is fired, the entire short-circuit device will fail, and the damage will be extremely serious.

Method used

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  • Switchgear for short circuit arc extinguishing for low voltage, medium voltage or high voltage
  • Switchgear for short circuit arc extinguishing for low voltage, medium voltage or high voltage
  • Switchgear for short circuit arc extinguishing for low voltage, medium voltage or high voltage

Examples

Experimental program
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Effect test

Embodiment 1

[0041] A switchgear for low-voltage, medium-voltage or high-voltage short-circuit arc extinguishing, including a housing 2, the two ends of the inner cavity of the housing 2 are respectively provided with a static contact 1, a cylinder 12, a piston 11 is provided in the cylinder 12, and the bottom of the cylinder 12 A gas generator 14 is provided, the front end of the piston 11 is provided with a movable contact 6, the piston 11, the cylinder 12 and the movable contact 4 are electrically connected, and the piston is also provided with a movable contact finger 13 to ensure that the piston 11 is in the process of moving. Fully electrically connected with the cylinder 12, an O-ring 10 is also provided between the piston and the moving contact, one end of the bellows 9 is airtightly connected with the energy storage acceleration shear plate 8 set on the inner wall of the housing, and the other end of the bellows 9 It is airtightly linked with the rear end of the moving contact 6, a...

Embodiment 2

[0046] The difference from Example 1 is that the end of the static contact 1 is provided with a spherical opening, and the front end of the moving contact 6 is provided with a ball head complementary to the spherical opening, the angle β is preferably 5°, and the angle α is preferably is 60°.

[0047] Example 2

[0048] The difference from Embodiment 1 is that the end of the static contact 1 is provided with a cylindrical opening, the front end of the moving contact 6 is provided with a column head complementary to the cylindrical opening, the opening end of the static contact and the column head end of the moving contact All parts are chamfered, the cylindrical opening of the static contact is provided with conductive static contact fingers, the β angle is preferably 15°, and the α angle is preferably 120°.

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Abstract

The invention relates to a switchgear for low-voltage, medium-voltage or high-voltage short-circuit arc extinguishing, which includes a housing, static contacts and a cylinder are respectively arranged at both ends of the inner cavity of the housing, a piston is arranged in the cylinder, and a gas generator is arranged at the bottom of the cylinder , the front end of the piston is provided with a moving contact, the cylinder, the piston and the moving contact are electrically connected, the side of the housing cavity close to the static contact is a vacuum chamber, and the front end of the static contact is provided with an anti-rebound buckle, The front end of the movable contact is provided with a guide limit groove corresponding to the anti-rebound buckle, and the front end of the anti-rebound buckle forms an angle β with the guide limit groove, and the angle β ranges from 5° to 15°. The moving contact is provided with a positioning ring, and a guiding and limiting groove is formed between the positioning ring and the moving contact. When the moving contact is driven into the static contact, the anti-rebound buckle is inserted into the guiding and limiting groove. The beneficial effect of the present invention is that the locking reliability is higher.

Description

technical field [0001] The invention relates to a switchgear, in particular to a short-circuit switchgear used in short-circuit systems for low-voltage, medium-voltage and high-voltage short-circuit arc extinguishing. Background technique [0002] Low-voltage, medium-voltage and high-voltage switchgear components have the task of distributing energy flows and ensuring safe operation. In the unlikely event of an internal fault (fault arc), the safety of the installation and the safety of persons must also be ensured. Due to its temperature, an arc fault occurring within a switchgear assembly produces a sharp gas pressure rise within a period of a few milliseconds, and this can cause the switchgear assembly to be destroyed by an explosion. Therefore, take steps to dissipate the pressure as quickly as possible. Furthermore, it is desirable to confine arc faults to the relevant area and never endanger operators. [0003] By proper design, eg by internal subdivision (division ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H39/00
CPCH01H39/004
Inventor 黄生华许三祥丁建龙蒋平陈江蔡昊席运桥赵洪艳田跃华余湖清
Owner 710TH RES INST OF CHINA SHIPBUILDING IND CORP
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