CN219203078U - Zero arcing cover for molded case circuit breaker - Google Patents
Zero arcing cover for molded case circuit breaker Download PDFInfo
- Publication number
- CN219203078U CN219203078U CN202223464249.7U CN202223464249U CN219203078U CN 219203078 U CN219203078 U CN 219203078U CN 202223464249 U CN202223464249 U CN 202223464249U CN 219203078 U CN219203078 U CN 219203078U
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- Prior art keywords
- zero
- circuit breaker
- arcing
- arc extinguishing
- molded case
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000005192 partition Methods 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims 2
- 238000010891 electric arc Methods 0.000 abstract description 13
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000008033 biological extinction Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model relates to a zero-arcing cover for a molded case circuit breaker, which comprises a zero-arcing cover body (1), wherein the zero-arcing cover body (1) is integrally sleeved outside an arc outlet of the circuit breaker, the zero-arcing cover body (1) comprises a zero-arcing cover shell (11) and an arc extinguishing grid sheet (2), a plurality of independent cavities are arranged inside the zero-arcing cover shell (11), and the number of the cavities is matched with the number of stages of the circuit breaker; a plurality of grooves are symmetrically arranged on the inner wall of each independent cavity, and a plurality of arc extinguishing grid plates (2) are clamped in the grooves; the zero-arcing cover shell (11) is provided with a plurality of groups of through holes (3) penetrating through the zero-arcing cover shell (11), and the positions of the through holes (3) are corresponding to the independent cavities. The utility model provides an external zero-arcing cover, which is used for carrying out secondary cooling and cutting on an electric arc through a structural space and an arc extinguishing grid sheet, so that full arc extinguishing is achieved, and the safety of a cabinet body and an entire circuit system is improved.
Description
Technical Field
The utility model relates to the technical field of piezoelectric devices, in particular to a zero arcing cover for a molded case circuit breaker.
Background
A molded case circuit breaker generally includes a plastic housing, a contact system, an arc extinguishing system, an operating mechanism, and a trip unit. When short-circuit current is generated, the release of the circuit breaker is instantaneously released to enable the operating mechanism to act, and the moving contact and the fixed contact are separated under the action of the driving of the operating mechanism and the action of electric repulsion. When the movable contact is separated from the fixed contact, the voltage between the movable contact and the fixed contact causes air medium discharge to form an electric arc, the electric arc moves towards the direction of the arc extinguishing system under the action of a magnetic field, and finally the electric arc is cooled and extinguished in the arc extinguishing system. For introducing the arc into the arc chute, a magnetic blow-off method is generally employed, i.e. the current loop is arranged such that the magnetic field generated by it interacts with the arc current to force the arc into the arc chute.
At present, most plastic shell type circuit breakers in the industry cannot completely extinguish an electric arc when a short circuit is broken, so that the electric arc is discharged out of the circuit breaker body to form reburning to damage an integrated cabinet body and other components in the cabinet, and the overall safety of the cabinet body is greatly reduced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provide the external zero-arcing cover, which is used for carrying out secondary cooling and cutting on the electric arc through the structural space and the arc extinguishing grid sheet, so as to achieve full arc extinguishing and improve the safety of the cabinet body and the whole circuit system.
The aim of the utility model can be achieved by the following technical scheme:
the zero-arcing cover for the molded case circuit breaker comprises a zero-arcing cover body, wherein the zero-arcing cover body is integrally sleeved outside an arc outlet of the circuit breaker, the zero-arcing cover body comprises a zero-arcing cover shell and an arc extinguishing grid sheet, a plurality of independent cavities are arranged inside the zero-arcing cover shell, and the number of the cavities is matched with the number of stages of the circuit breaker;
a plurality of grooves are symmetrically arranged on the inner wall of each independent cavity, and a plurality of arc extinguishing grid plates are clamped in the grooves;
the zero-arcing cover shell is provided with a plurality of groups of through holes penetrating through the zero-arcing cover shell, and the positions of the through holes are corresponding to the independent cavities.
Further, protrusions are symmetrically arranged at the left end and the right end of the arc extinguishing grid sheet, and the protrusions and grooves on the inner wall of the independent cavity form interference fit, so that the position of the arc extinguishing grid sheet in the zero arcing cover shell is fixed.
Further, a plurality of arc-extinguishing bars in the independent cavity are longitudinally arranged, and the arc-extinguishing bars have two shapes.
Further, arc extinguishing bars at the uppermost end and the lowermost end in the independent cavity are rectangular plates, and V-shaped openings are formed in the front ends of the arc extinguishing bars at the middle parts, so that the arc is conveniently elongated, and the arc is more conveniently extinguished.
Further, the through holes are formed in the top and the rear of the zero-arcing cover shell, and the through holes are of rectangular structural design.
Further, the through holes are transversely distributed to form a group of through hole row structures, three groups of through hole row structures are correspondingly arranged in each independent cavity at the rear part of the zero arcing cover shell, a group of through hole row structures are correspondingly arranged in each independent cavity at the top of the zero arcing cover shell, arc extinction is realized by arc extinction grid cutting arcs, and finally, the fine arcs which are splashed finally are cut again by rectangular through holes on the shell, so that the arc extinction effect of zero arcing is achieved.
Further, the front end of the partition board of the independent cavity is provided with a bump structure matched with the circuit breaker.
Further, protruding block structures matched with the circuit breaker are arranged on two sides of the partition board of the independent cavity, and the zero arcing cover body and the circuit breaker are assembled through matching of the protruding block structures with grooves corresponding to the circuit breaker.
Further, screw holes are symmetrically formed in two sides of the upper end of the zero arcing cover shell, and the zero arcing cover body is connected with the circuit breaker body through screws.
Further, the zero-arcing cover shell is made of nylon, and the arc extinguishing grid plates are made of carbon structural steel.
Compared with the prior art, the utility model has the following advantages:
(1) The arc extinguishing grid sheet in the external zero arcing cover is used for carrying out secondary cooling and cutting on the electric arc, so that full arc extinguishing is achieved, the safety of the cabinet body and the whole circuit system is improved, and electric accidents caused by incomplete extinguishing of the electric arc discharged out of the circuit breaker body are eliminated.
(2) The external zero arcing cover is convenient to install, secondary refitting of the circuit breaker is not needed, and the space of the cabinet body can be fully utilized after the circuit breaker is installed, and an electric gap is not needed to be considered.
Drawings
FIG. 1 is a schematic view of the structure of a zero arcing shield body of the present utility model;
fig. 2 is a schematic structural view of an arc extinguishing gate sheet according to the present utility model;
FIG. 3 is a schematic view of the structure of the zero arcing shield housing of the present utility model;
fig. 4 is a schematic structural diagram of the zero arcing shield body and circuit breaker assembly of the present utility model.
In the figure: 1. a zero arcing shield body; 11. zero arcing cover shell; 2. arc extinguishing grid plates; 21. a protrusion; 22. a V-shaped opening; 3. and a through hole.
Detailed Description
The utility model will now be described in detail with reference to the drawings and specific examples.
Examples
As shown in fig. 1, a zero arcing cover for a molded case circuit breaker comprises a zero arcing cover body 1, wherein the zero arcing cover body 1 comprises a zero arcing cover shell 11 and an arc extinguishing grid sheet 2, a plurality of independent cavities are arranged inside the zero arcing cover shell 11, and the number of the cavities is matched with the number of stages of the circuit breaker. The molded case circuit breaker in this embodiment is a three-phase molded case circuit breaker. The inner wall of each independent cavity of the zero arcing shield shell 11 is symmetrically provided with a plurality of grooves, and a plurality of arc extinguishing grid plates 2 are clamped in the grooves.
As shown in fig. 2, protrusions 21 are symmetrically arranged at the left end and the right end of the arc extinguishing grid sheet 2, and the protrusions 21 and grooves on the inner wall of the independent cavity form interference fit, so that the position of the arc extinguishing grid sheet 2 in the zero arcing shield shell 11 is fixed. In this embodiment, the protrusion 21 has a semicircular structure, and the circular arc structure is more convenient for the arc extinguishing gate sheet 2 to squeeze into the groove to form interference fit.
The arc extinguishing bars 2 in the independent cavity are longitudinally arranged, and the arc extinguishing bars 2 have two shapes. The arc-extinguishing grid plates 2 at the uppermost end and the lowermost end in the independent cavity are rectangular plates, and the front ends of the arc-extinguishing grid plates 2 at the middle are provided with V-shaped openings 22. The V-shaped opening 22 facilitates lengthening of the arc and more facilitates extinguishing of the arc. In this embodiment, 2 arc extinguishing bars 2 with V-shaped openings 22 are installed in each independent cavity.
As shown in fig. 3, the zero arcing shield shell 11 is provided with a plurality of groups of through holes 3 penetrating through the zero arcing shield shell 11, and the positions of the through holes 3 are corresponding to the independent cavities. The through hole 3 is arranged at the top and the rear part of the zero arcing cover shell 11, and the through hole 3 is of a rectangular structural design.
The through holes 3 are transversely distributed to form a group of through hole row structures, three groups of through hole row structures are correspondingly arranged in each independent cavity at the rear part of the zero-arcing cover shell 11, and a group of through hole row structures are correspondingly arranged in each independent cavity at the top of the zero-arcing cover shell 11. The arc extinguishing grating sheet 2 cuts the electric arc to realize arc extinction, and finally, the rectangular through hole 3 on the shell cuts the fine electric arc splashed finally again, so that the arc extinguishing effect of zero arcing is achieved.
As shown in fig. 1 and 4, the front end of the partition board of the independent cavity is provided with a bump structure matched with the circuit breaker. The two sides of the partition board of the independent cavity are provided with lug structures matched with the circuit breaker, and the zero arcing cover body 1 and the circuit breaker are assembled by matching the lug structures with grooves corresponding to the circuit breaker. Screw holes are symmetrically formed in two sides of the upper end of the zero arcing cover shell 11, and the zero arcing cover body 1 is connected with the circuit breaker body through screws.
The zero-arcing cover body 1 is integrally sleeved outside the arc outlet of the circuit breaker, and is used for carrying out secondary cooling and cutting on the electric arc of the arc outlet, so that full arc extinction is achieved, the safety of a cabinet body and the whole circuit system is improved, and electric accidents caused by incomplete extinction of the electric arc discharged out of the circuit breaker body are eliminated.
Specifically, the zero arcing cover shell 11 is made of nylon, and the arc extinguishing grid plates 2 are made of carbon structural steel.
The external zero arcing cover is convenient to install, secondary refitting of the circuit breaker is not needed, the space of the cabinet body can be fully utilized after the circuit breaker is installed, the space utilization rate is improved, the breaking performance of the circuit breaker is optimized, and an electric gap is not needed to be considered.
It should be noted that, in the description of the present utility model, the terms "upper," "lower," "inner," "outer," "front," "rear," "both ends," "one end," "the other end," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Claims (10)
1. The zero-arcing cover for the molded case circuit breaker comprises a zero-arcing cover body (1), and is characterized in that the zero-arcing cover body (1) is integrally sleeved outside an arc outlet of the circuit breaker, the zero-arcing cover body (1) comprises a zero-arcing cover shell (11) and an arc extinguishing grid sheet (2), a plurality of independent cavities are arranged inside the zero-arcing cover shell (11), and the number of the cavities is matched with the number of stages of the circuit breaker;
a plurality of grooves are symmetrically arranged on the inner wall of each independent cavity, and a plurality of arc extinguishing grid plates (2) are clamped in the grooves;
the zero-arcing cover shell (11) is provided with a plurality of groups of through holes (3) penetrating through the zero-arcing cover shell (11), and the positions of the through holes (3) are corresponding to the independent cavities.
2. The zero arcing shield for the molded case circuit breaker according to claim 1, wherein protrusions (21) are symmetrically arranged at the left end and the right end of the arc extinguishing grid sheet (2), and the protrusions (21) form interference fit with grooves on the inner wall of the independent cavity, so that the position of the arc extinguishing grid sheet (2) in the zero arcing shield shell (11) is fixed.
3. A zero arcing shield for a molded case circuit breaker according to claim 1, characterized in that several arc extinguishing bars (2) in the separate cavity are arranged longitudinally, the arc extinguishing bars (2) having two shapes.
4. A zero arcing shield for a molded case circuit breaker according to claim 3, characterized in that the arc extinguishing bars (2) at the uppermost and lowermost ends in the independent cavity are rectangular plates, and the front ends of the arc extinguishing bars (2) at the middle are provided with V-shaped openings (22).
5. The zero arcing shield for a molded case circuit breaker according to claim 1, wherein the through hole (3) is provided at the top and the rear of the zero arcing shield case (11), and the through hole (3) is of rectangular structural design.
6. The zero arcing cover for the molded case circuit breaker according to claim 5, wherein the through holes (3) are transversely arranged to form a group of through hole row structures, three groups of through hole row structures are correspondingly arranged in each independent cavity at the rear part of the zero arcing cover shell (11), and a group of through hole row structures are correspondingly arranged in each independent cavity at the top part of the zero arcing cover shell (11).
7. The zero arcing shield for a molded case circuit breaker of claim 1, wherein the front end of the separator of the independent cavity is provided with a bump structure that mates with the circuit breaker.
8. The zero arcing shield for the molded case circuit breaker according to claim 1, wherein bump structures matched with the circuit breaker are arranged on two sides of the partition board of the independent cavity, and the zero arcing shield body (1) is assembled with the circuit breaker through the bump structures matched with grooves corresponding to the circuit breaker.
9. The zero arcing cover for the molded case circuit breaker according to claim 1, wherein screw holes are symmetrically arranged at two sides of the upper end of the zero arcing cover shell (11), and the zero arcing cover body (1) is connected with the circuit breaker body through screws.
10. The zero arcing shield for the molded case circuit breaker according to claim 1, wherein the material of the zero arcing shield shell (11) is nylon, and the material of the arc extinguishing grid sheet (2) is carbon structural steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223464249.7U CN219203078U (en) | 2022-12-25 | 2022-12-25 | Zero arcing cover for molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223464249.7U CN219203078U (en) | 2022-12-25 | 2022-12-25 | Zero arcing cover for molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219203078U true CN219203078U (en) | 2023-06-16 |
Family
ID=86726648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223464249.7U Active CN219203078U (en) | 2022-12-25 | 2022-12-25 | Zero arcing cover for molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219203078U (en) |
-
2022
- 2022-12-25 CN CN202223464249.7U patent/CN219203078U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |