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Arc guiding and extinguishing apparatus and DC breaker using same

A DC circuit breaker and arc extinguishing device technology, which is applied to circuit breaker parts and components, can solve the problem that arc guiding and arc extinguishing devices cannot make full use of electric power and thermal driving force, etc., and achieves wide application range, strong arc extinguishing ability, The effect of good arc guiding effect

Active Publication Date: 2013-02-13
ANDELI GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is the problem that the arc-guiding and arc-extinguishing devices in the prior art cannot make full use of the electromotive force and thermal driving force generated under short-circuit conditions, so as to provide a Electric power and thermal driving force, have a good arc blowing effect on the arc near the moving contact and the static contact, stronger arc extinguishing ability, and a wider range of application. DC circuit breaker for the device

Method used

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  • Arc guiding and extinguishing apparatus and DC breaker using same
  • Arc guiding and extinguishing apparatus and DC breaker using same
  • Arc guiding and extinguishing apparatus and DC breaker using same

Examples

Experimental program
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Effect test

Embodiment 1

[0041] This embodiment provides an arc guiding and extinguishing device for a DC circuit breaker, the structure of which is as follows: figure 1 As shown, it includes a U-shaped motor slot 1 and an arc extinguishing cover assembly 2, the U-shaped motor slot 1 is connected to the arc extinguishing cover assembly 2, and the arc extinguishing grid 29 is arranged inside the arc extinguishing cover assembly 2, so The U-shaped motor slot 1 includes a cover 4 and a cover 5 that are fastened to each other. A U-shaped yoke is arranged in the inner cavity formed by the fastening of the cover 4 and the cover 5, and the U-shaped magnetic Ferromagnetic material blocks 7 are respectively arranged above the two side walls of the yoke 6, and one end of the U-shaped motor slot 1 extends into the arc extinguishing hood assembly 2, and is located at the top of the arc extinguishing hood assembly 2 to extinguish the arc. The grid piece 3 extends between the two ferromagnetic material blocks 7 to ...

Embodiment 2

[0045] On the basis of the above-mentioned embodiment 1, in order to effectively increase the moving speed of the arc, it is also possible to increase the pressure of the gas medium around the arc and increase the close contact between the arc and the plastic cover to strengthen the cooling effect on the arc and the surface recombination effect. Realize rapid arc extinguishing. The casing 4 and the cover 5 are made of plastics such as nylon PA46 that can generate gas at high temperatures in the arc. It is made of insulating material (nylon PA46) that generates gas under the arc. Its function is to not only insulate the arc extinguishing grids from each other, but also generate gas at high temperature, increase the pressure of the gas medium around the arc, and increase the arc. The relative movement speed with the fluid medium is very beneficial to arc extinguishing. The top arc extinguishing grid 3 does not use the traditional long-leg grid but the short-leg grid, and forms a...

Embodiment 3

[0049] Such as figure 2 As shown, a DC circuit breaker using the arc guiding and extinguishing device of the present invention includes a static contact assembly 8, a moving contact assembly 9, an arc shield assembly 10 and the arc guiding and arc extinguishing device. The arc extinguishing cover assembly 10 is arranged on the front end of the static contact assembly 8 and the moving contact assembly 9. The arc guiding and arc extinguishing device includes a U-shaped motor slot 1 and an arc extinguishing cover assembly 2. The U-shaped motor slot 1 and the The arc extinguishing cover assembly 2 is connected. The arc extinguishing cover assembly 2 is provided with an arc extinguishing grid 3. The U-shaped motor slot 1 includes a cover 4 and a cover 5 that are interlocked. The cover 4 and the cover 5. A U-shaped magnetic yoke is arranged in the inner cavity formed by buckling, and the U-shaped magnetic yoke can form a U-shaped magnetic circuit, and ferromagnetic Material block ...

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Abstract

The invention discloses an arc guiding and extinguishing apparatus, as well as a DC breaker using the arc guiding and extinguishing apparatus. The arc guiding and extinguishing apparatus comprises a U-shaped motor groove and an arc extinguishing cover component which are mutually connected, wherein a U-shaped magnet yoke is arranged in a hollow cavity of the U-shaped motor groove; a magnetic material block is respectively arranged on each side of the upper sides of two sidewalls of the magnet yoke; and a reversed U-shaped magnetic path is formed by the magnetic material blocks and an arc extinguishing grid sheet in the arc extinguishing cover component. The magnetism generated by the current in a conductive circuit in the U-shaped magnet yoke and the reversed U-shaped magnetic path has a strong magnetic blowing force on the arc which is instantly generated when a movable contact and a static contact are released from contact, so as to blow the arc into the arc extinguishing cover component to extinguish the arc. With the adoption of the arc guiding and extinguishing apparatus, as well as the DC breaker using the arc guiding and extinguishing apparatus, the problem that the arc guiding effect on the arc near to the dynamic contact by the arc guiding device in the prior art is poor is solved; and the arc guiding and extinguishing apparatus, as well as the DC breaker using the arc guiding and extinguishing apparatus is excellent in arc guiding effect, strong in arc extinguishing ability, short in arc spraying distance and wide in application range for all arcs between the dynamic contact and the static contact.

Description

technical field [0001] The invention relates to an arc-guiding and arc-extinguishing device, in particular to an arc-guiding and arc-extinguishing device suitable for a DC circuit breaker. Background technique [0002] With the increasing development of industry and green energy, such as solar power generation, wind power generation and urban rail transit are changing with each passing day, and are favored by the world. In these new fields, not only various AC power supply systems are required, but also DC power supply systems and centralized power monitoring systems are required. In the DC power supply system, the DC molded case circuit breaker is one of the important components to ensure the stable, reliable and safe operation of the DC power supply system. Arcs are generated in situations such as ionization, and because there is no zero-crossing phenomenon in direct current, it is more difficult to extinguish the arc. Therefore, the arc-guiding and arc-extinguishing devi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H73/18
Inventor 杨胜国陈武奇黄庆荣
Owner ANDELI GRP
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