CN111489923A - Leakage protection circuit breaker - Google Patents
Leakage protection circuit breaker Download PDFInfo
- Publication number
- CN111489923A CN111489923A CN201910078247.8A CN201910078247A CN111489923A CN 111489923 A CN111489923 A CN 111489923A CN 201910078247 A CN201910078247 A CN 201910078247A CN 111489923 A CN111489923 A CN 111489923A
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- Prior art keywords
- assembly
- cover
- circuit breaker
- residual current
- poles
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- 238000003466 welding Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 description 6
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000009182 swimming Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
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Abstract
The invention relates to an electric leakage protection circuit breaker, which comprises a shell and at least three poles which are arranged in the shell in sequence in a first direction, wherein the electric leakage protection circuit breaker comprises an incoming line terminal assembly, a circuit breaking assembly and an outgoing line terminal assembly, the electric leakage protection assembly shared by the at least three poles is integrated in the electric leakage protection circuit breaker, the incoming line terminal assembly, the circuit breaking assembly, the electric leakage protection assembly and the outgoing line terminal assembly are arranged in sequence in a second direction perpendicular to the first direction in the shell, and the electric leakage protection assembly is mechanically connected to the shell.
Description
Technical Field
The invention relates to a leakage protection circuit breaker.
Background
The earth leakage protection circuit breaker has overload, short circuit and earth leakage protection functions, namely, the functions of the circuit breaker and the functions of an earth leakage protector. Therefore, the leakage protection circuit breaker is a commonly used protection device in an electrical circuit and is widely used for mobile electrical equipment and handheld electric tools; electrical equipment installed in humid and strong corrosive places; electrical construction machinery at a construction site; outlet circuits in buildings such as schools, businesses, residences, and the like; underwater lighting devices for swimming pools, fountains, bathing pools; power supply lines and equipment installed in the water; electrical medical equipment in hospitals which directly contact the human body, and the like.
In the prior art, a three-pole circuit breaker and a four-pole circuit breaker are generally assembled with a leakage protector side by side to realize the function of the leakage protection circuit breaker. The assembly of the side-by-side structure is unreliable, so that the reliability and safety are poor. Further, a temperature rise problem occurs in a structure in which the breaker and the earth leakage protector are generally assembled together by using screws, and particularly, when the screws are not tightened, the temperature rise problem is more serious, which further affects the safety of the breaker. In addition, the assembled side-by-side structure has larger volume and occupies larger space of the distribution box, thereby increasing the cost of the electrical equipment. Taking a four-pole circuit breaker as an example, the structure of the assembled earth leakage protector generally has a width of 135mm and a length of 91mm, and thus occupies a large space.
Disclosure of Invention
The object of the present invention is to provide a residual current circuit breaker which is reliable in assembly, small in size and free from the problem of temperature rise, and thus has high reliability and safety, and low cost and power consumption.
The invention relates to an electric leakage protection circuit breaker, which comprises a shell and at least three poles which are arranged in the shell in sequence in a first direction, wherein the electric leakage protection circuit breaker comprises an incoming line terminal assembly, a circuit breaking assembly and an outgoing line terminal assembly.
Preferably, each of the at least three poles includes a trip assembly including a thermal trip assembly and a magnetic trip assembly.
Preferably, the earth leakage circuit breaker comprises four poles, of which only three poles each comprise a breaking assembly comprising a thermal trip assembly and a magnetic trip assembly.
Preferably, the housing includes a first side cover, a middle cover, and a second side cover sequentially arranged in the first direction, and the middle cover includes a middle upper cover and a middle lower cover sequentially arranged in the second direction.
Preferably, the inlet terminal assembly and circuit interrupting assembly are disposed in an upper cavity formed by the first side cover, the intermediate upper cover and the second side cover.
Preferably, the middle upper cover comprises a first middle upper cover, a second middle upper cover, two third middle upper covers and two fourth middle upper covers.
Preferably, the earth leakage circuit breaker comprises four poles, the inlet terminal assembly and the breaking assembly of a first pole of the four poles being arranged in a first upper chamber formed by the first side cover and the first intermediate upper cover, the inlet terminal assembly and the breaking assembly of a second pole being arranged in a second upper chamber formed by the second intermediate upper cover and one third intermediate upper cover, the inlet terminal assembly and the breaking assembly of a third pole being arranged in a third upper chamber formed by one fourth intermediate upper cover and another third intermediate upper cover, the inlet terminal assembly and the breaking assembly of a fourth pole being arranged in a fourth upper chamber formed by another fourth intermediate upper cover and the second side cover.
Preferably, the earth leakage protection assembly and the outlet terminal assembly are disposed in a lower cavity formed by the first side cover, the middle lower cover and the second side cover.
Preferably, the middle lower cover comprises two first middle lower covers, one second middle lower cover and one third middle lower cover.
Preferably, the casing further includes a cover plate disposed on the first side cover, the middle upper cover, and the second side cover, and the test button of the earth leakage circuit breaker is disposed on the cover plate.
Preferably, the earth leakage protection component is mechanically connected to the housing by welding.
Drawings
Advantages and objects of the present invention will be better understood from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the relationship of the various components. In the drawings:
fig. 1 is a schematic diagram of the overall structure of one embodiment of the earth leakage circuit breaker of the present invention;
fig. 2 is a cross-sectional view of the earth leakage circuit breaker of fig. 1; and
fig. 3 is a three-dimensional schematic diagram of an embodiment of the earth leakage circuit breaker of the present invention.
Detailed Description
Various embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Here, it is to be noted that, in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted. The terms "first direction", "second direction", and the like herein are described with respect to the drawings of the present invention, unless otherwise specified. The term "A, B, C, etc. in series" merely indicates the order in which the elements A, B, C, etc. are arranged and does not exclude the possibility of including other elements between a and B and/or between B and C. The descriptions of "first", "second", "upper" and "lower" are merely for distinguishing between the respective components and do not limit the scope of the present invention, and "first" may be written as "second" and "upper" may be written as "lower" without departing from the scope of the present invention.
The drawings accompanying this specification are for illustrative purposes and are included to provide a further understanding of the principles of the invention and to show some of the details of the invention in relation to one another.
Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to fig. 1 to 3.
Fig. 1 shows an embodiment of the earth leakage circuit breaker of the invention. The earth leakage circuit breaker comprises a casing 5 and four poles, namely a first pole 1, a second pole 2, a third pole 3 and a fourth pole 4, arranged inside the casing 5 and arranged in sequence in a first direction x. As shown in fig. 1, the first direction x is a direction pointing from left to right in the plane of the drawing, and the second direction y is a direction perpendicular to the first direction from top to bottom in the plane of the drawing.
The earth leakage circuit breaker shown in fig. 1 includes four poles, but the number of poles of the present invention is not limited thereto.
Fig. 2 shows a cross-sectional view of the earth leakage circuit breaker of fig. 1. The second direction y is the top-down direction shown in fig. 2. The earth leakage circuit breaker includes an incoming terminal assembly a1, a disconnect assembly a2, and an outgoing terminal assembly a 4. The earth leakage protection circuit breaker is also integrated with an earth leakage protection assembly A3 shared by four poles.
As shown in fig. 2, the inlet terminal assembly a1, the disconnect assembly a2, the earth leakage protection assembly A3, and the outlet terminal assembly a4 are arranged in this order in the second direction y inside the housing 5.
By integrating the earth leakage protection assembly in the shell of the circuit breaker, an earth leakage protector does not need to be additionally spliced outside the circuit breaker, and the problem of unreliable assembly does not exist, so that the earth leakage protection circuit breaker has higher reliability and safety.
For example, in the four pole earth leakage circuit breaker shown in fig. 1 and 2, which includes four poles, each of the first, second, third and fourth poles 1, 2, 3 and 4 includes an incoming terminal assembly a1, a disconnect assembly a2 and an outgoing terminal assembly a4, and the four poles share one earth leakage assembly A3.
As shown in fig. 2, the breaking assemblies a2 of the first, second, third and fourth poles 1, 2, 3 and 4 respectively include a thermal trip assembly a5 for overload protection and a magnetic trip assembly a6 for short circuit protection. In the second direction y, thermal release assembly A5 is disposed below inlet terminal assembly A1 and magnetic release assembly A6 is disposed below thermal release assembly A5. Furthermore, the circuit breaking assembly comprises a mechanical locking handle device, a contact system, an arc extinguishing system, etc.
For example, thermal trip assembly a5 includes a bimetallic strip that can bend when overloaded. For example, magnetic release assembly a6 includes an electromagnetic release that is comprised of a coil, an iron core, a spring, and a plunger.
The leakage protection module a3 shared by the first pole 1, the second pole 2, the third pole 3 and the fourth pole 4 includes, for example, an electronic module board, a zero sequence current transformer, a leakage release, and the like.
The invention can respectively provide thermal protection and magnetic protection for the four poles, so the integrated leakage protection circuit breaker has higher reliability and safety.
For example, in the three-pole earth leakage circuit breaker of the present invention, each of the first pole 1, the second pole 2, and the third pole 3 includes an incoming terminal assembly a1, a breaking assembly a2, and an outgoing terminal assembly a4, and the three poles share the earth leakage assembly A3, while the fourth pole 4 does not have the incoming terminal assembly a1, the breaking assembly a2, and the outgoing terminal assembly a4, i.e., no assembly is disposed in the fourth pole 4.
For example, in the 3P + N earth leakage circuit breaker of the present invention, which includes only three protection poles, each of the first, second and third poles 1, 2, 3 includes an incoming terminal assembly a1, a breaking assembly a2 and an outgoing terminal assembly a4, the breaking assemblies of the three poles each include a thermal and magnetic trip assembly, and the three protection poles share an earth leakage protection assembly A3, and the fourth pole 4 includes an incoming terminal assembly a1, an outgoing terminal assembly a4 and an electric wire for connecting with the other three poles to form a loop.
According to practical conditions, each pole of the residual current circuit breaker can have other embodiments.
As described above, the present invention can provide thermal protection and magnetic protection for three poles, respectively, so that the integrated earth leakage circuit breaker of the present invention has high reliability and safety.
The earth leakage protection assembly a3 shown in fig. 2 is mechanically connected to the case 5 of the earth leakage circuit breaker, for example by welding. The maximum current of the earth leakage circuit breaker in fig. 2 is 63A.
The leakage protection circuit breaker provided by the invention avoids the problem of temperature rise caused by the fact that the circuit breaker and the leakage protector are installed together by adopting the screw, and has higher safety. In addition, the power consumption of the earth leakage protection circuit breaker is reduced by at least 15% compared with the assembled structure. Therefore, the integrated earth leakage protection circuit breaker can meet the requirements of more civil and industrial applications.
Fig. 3 shows a three-dimensional schematic view of an embodiment of the earth leakage circuit breaker of the invention. As shown in fig. 3, the first direction x is a left-to-right direction, and the second direction y is a top-to-bottom direction.
The housing 5 includes a first side cover 6, a middle cover, and a second side cover 7 arranged in order in the first direction x, and the middle cover includes a middle upper cover and a middle lower cover in order in the second direction y.
For example, a line terminal assembly a1 and a disconnect assembly a2 are disposed in an upper chamber formed by a first side cover, a middle upper cover, and a second side cover. For example, the earth leakage protection assembly A3 and the outlet terminal assembly a4 are disposed in a lower cavity formed by the first side cover, the intermediate lower cover, and the second side cover.
As shown in fig. 3, the intermediate upper covers include a first intermediate upper cover 9, a second intermediate upper cover 10, a third intermediate upper cover 11, and a fourth intermediate upper cover 12, where the number of the first intermediate upper cover 9 and the second intermediate upper cover 10 is one, the number of the third intermediate upper cover 11 is two, and the number of the fourth intermediate upper cover 12 is two. That is, in the first direction x, the first side cover 6, the first intermediate upper cover 9, the second intermediate upper cover 10, one third intermediate upper cover 11, one fourth intermediate upper cover 12, the other third intermediate upper cover 11, the other fourth intermediate upper cover 12, and the second side cover 7 are arranged in this order.
In the case 5 shown in fig. 3, the incoming terminal assembly and breaking assembly of the first pole 1 of the four-pole earth leakage circuit breaker comprising four protection poles are arranged in a first upper chamber formed by a first side cover 6 and a first intermediate upper cover 9, the incoming terminal assembly and breaking assembly of the second pole 2 are arranged in a second upper chamber formed by a second intermediate upper cover 10 and a third intermediate upper cover 11, the incoming terminal assembly and breaking assembly of the third pole 3 are arranged in a third upper chamber formed by a fourth intermediate upper cover 12 and another third intermediate upper cover 11, and the incoming terminal assembly and breaking assembly of the fourth pole 4 are arranged in a fourth upper chamber formed by another fourth intermediate upper cover 12 and a second side cover 7.
As shown in fig. 3, the middle lower cover includes a first middle lower cover 13, a second middle lower cover 14, and a third middle lower cover 15, wherein the number of the first middle lower cover 13 is two, and the number of the second middle lower cover 14 and the third middle lower cover 15 is one, respectively. That is, in the first direction x, the first side cover 6, one first intermediate lower cover 13, the second intermediate lower cover 14, the third intermediate lower cover 15, the other first intermediate lower cover 13, and the second side cover 7 are arranged in order.
In the case 5 shown in fig. 3, the earth leakage protection assembly A3 and the outlet terminal assembly a4 of the four pole earth leakage circuit breaker including four poles of protection are disposed in the lower chamber formed by the first side cover 6, the two first intermediate lower covers 13, the second intermediate lower cover 14, the third intermediate lower cover 15 and the second side cover 7.
For example, in the three-pole residual current circuit breaker of the invention, the incoming terminal assembly and breaking assembly of the first pole 1 are arranged in a first upper chamber formed by the first side cover 6 and the first intermediate upper cover 9, the incoming terminal assembly and breaking assembly of the second pole 2 are arranged in a second upper chamber formed by the second intermediate upper cover 10 and one third intermediate upper cover 11, the incoming terminal assembly and breaking assembly of the third pole 3 are arranged in a third upper chamber formed by one fourth intermediate upper cover 12 and the other third intermediate upper cover 11, and no assembly is arranged in a fourth upper chamber formed by the other fourth intermediate upper cover 12 and the second side cover 7. The earth leakage protection assembly A3 and the outlet terminal assembly a4 of the first pole 1, the second pole 2, the third pole 3 are disposed in the lower chamber formed by the first side cover 6, the two first intermediate lower covers 13, the second intermediate lower cover 14, the third intermediate lower cover 15 and the second side cover 7.
For example, in the 3P + N earth leakage circuit breaker of the present invention, which comprises only three protection poles, the incoming terminal assembly and breaking assembly of the first pole 1 is arranged in a first upper chamber formed by the first side cover 6 and the first intermediate upper cover 9, the incoming terminal assembly and breaking assembly of the second pole 2 is arranged in a second upper chamber formed by the second intermediate upper cover 10 and one third intermediate upper cover 11, the incoming terminal assembly and breaking assembly of the third pole 3 is arranged in a third upper chamber formed by one fourth intermediate upper cover 12 and another third intermediate upper cover 11, and the wire and incoming terminal assembly in the fourth pole 4 is arranged in a fourth upper chamber formed by another fourth intermediate upper cover 12 and the second side cover 7. The earth leakage protection assembly A3 and the outlet terminal assembly a4 of the first pole 1 to the third pole 3, and the outlet terminal assembly a4 of the fourth pole are disposed in the lower chamber formed by the first side cover 6, the two first intermediate lower covers 13, the second intermediate lower cover 14, the third intermediate lower cover 15, and the second side cover 7.
As shown in fig. 3, the housing 5 further includes a cover plate 8 disposed on the first side cover 6, the first middle cover 9, the second middle cover 10, the third middle cover 11, the fourth middle cover 12, and the second side cover 7, and a test button 16 for testing whether the earth leakage breaker is energized and testing whether the earth leakage breaker can normally operate is disposed on the cover plate 8.
The earth leakage breaker shown in fig. 1 and 3 has a width w of 72mm in the first direction x and a length 1 of 92.5mm in the second direction y. Compared with the assembled residual current circuit breaker with the width of 135mm and the length of 91mm in the prior art, the integrated residual current circuit breaker has the advantages that the width is greatly reduced, the length is only slightly increased, and the size is remarkably smaller. Therefore, the miniaturized residual current circuit breaker is more flexible and easier to assemble.
The technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the invention, so as to achieve the purpose of the invention.
Claims (11)
1. An earth leakage protection circuit breaker comprises a shell and at least three poles which are arranged in the shell in sequence in a first direction, wherein the earth leakage protection circuit breaker comprises an incoming line terminal component, a circuit breaking component and an outgoing line terminal component,
the leakage protection circuit breaker is characterized in that a leakage protection assembly shared by at least three poles is integrated in the leakage protection circuit breaker, in the shell, the incoming line terminal assembly, the circuit breaking assembly, the leakage protection assembly and the outgoing line terminal assembly are sequentially arranged in a second direction perpendicular to the first direction, and the leakage protection assembly is mechanically connected to the shell.
2. A residual current circuit breaker as claimed in claim 1, characterized in that each of said at least three poles comprises a breaking assembly comprising a thermal release assembly and a magnetic release assembly.
3. A residual current circuit breaker as claimed in claim 1, characterized in that said residual current circuit breaker comprises four poles, of which only three poles each comprise a breaking assembly comprising a thermal tripping assembly and a magnetic tripping assembly.
4. The earth leakage circuit breaker of claim 1, wherein said housing comprises a first side cover, a middle cover and a second side cover arranged in sequence in said first direction, and said middle cover comprises a middle upper cover and a middle lower cover arranged in sequence in said second direction.
5. The residual current circuit breaker of claim 4, wherein said inlet terminal assembly and circuit interrupting assembly are disposed in an upper cavity formed by said first side cover, said intermediate upper cover, and said second side cover.
6. A residual current circuit breaker as claimed in claim 5, characterized in that said intermediate upper covers comprise a first intermediate upper cover, a second intermediate upper cover, two third intermediate upper covers and two fourth intermediate upper covers.
7. The residual current circuit breaker according to claim 6, characterized in that it comprises four poles, the inlet terminal assembly and breaking assembly of a first of said four poles being arranged in a first upper chamber formed by said first side cover and said first intermediate upper cover, the inlet terminal assembly and breaking assembly of a second pole being arranged in a second upper chamber formed by said second intermediate upper cover and a third intermediate upper cover, the inlet terminal assembly and breaking assembly of a third pole being arranged in a third upper chamber formed by a fourth intermediate upper cover and a further third intermediate upper cover, the inlet terminal assembly and breaking assembly of a fourth pole being arranged in a fourth upper chamber formed by a further fourth intermediate upper cover and said second side cover.
8. A residual current circuit breaker as claimed in claim 4 or 5, characterized in that said residual current protection assembly and outlet terminal assembly are arranged in a lower chamber formed by said first side cover, said intermediate lower cover and said second side cover.
9. A residual current circuit breaker as claimed in claim 8, characterized in that said intermediate lower cover comprises two first intermediate lower covers, one second intermediate lower cover and one third intermediate lower cover.
10. The residual current circuit breaker as claimed in claim 4, wherein said housing further comprises a cover plate disposed on said first side cover, said middle upper cover and said second side cover, and a test button of said residual current circuit breaker is disposed on said cover plate.
11. A residual current circuit breaker as claimed in claim 1, characterized in that said residual current assembly is mechanically connected to said casing by welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078247.8A CN111489923A (en) | 2019-01-25 | 2019-01-25 | Leakage protection circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910078247.8A CN111489923A (en) | 2019-01-25 | 2019-01-25 | Leakage protection circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111489923A true CN111489923A (en) | 2020-08-04 |
Family
ID=71812300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910078247.8A Pending CN111489923A (en) | 2019-01-25 | 2019-01-25 | Leakage protection circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111489923A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068251A (en) * | 2020-08-03 | 2022-02-18 | 天津首瑞智能电气有限公司 | Electric switch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202307726U (en) * | 2011-09-23 | 2012-07-04 | 施耐德电器工业公司 | Circuit breaker with electric leakage protection function |
| CN102683130A (en) * | 2011-03-09 | 2012-09-19 | 上海电科电器科技有限公司 | Circuit breaker with optimized space allocation |
| CN103021740A (en) * | 2011-09-23 | 2013-04-03 | 施耐德电器工业公司 | Circuit breaker with leakage protection function |
| CN106571270A (en) * | 2015-10-09 | 2017-04-19 | 施耐德电气工业公司 | Electric leakage circuit breaker |
| CN108321047A (en) * | 2018-02-02 | 2018-07-24 | 深圳曼顿科技有限公司 | Miniature circuit breaker with novel zero sequence mutual inductor installation structure |
| CN209328812U (en) * | 2019-01-25 | 2019-08-30 | 施耐德电器工业公司 | Earth leakage circuit breaker |
-
2019
- 2019-01-25 CN CN201910078247.8A patent/CN111489923A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102683130A (en) * | 2011-03-09 | 2012-09-19 | 上海电科电器科技有限公司 | Circuit breaker with optimized space allocation |
| CN202307726U (en) * | 2011-09-23 | 2012-07-04 | 施耐德电器工业公司 | Circuit breaker with electric leakage protection function |
| CN103021740A (en) * | 2011-09-23 | 2013-04-03 | 施耐德电器工业公司 | Circuit breaker with leakage protection function |
| CN106571270A (en) * | 2015-10-09 | 2017-04-19 | 施耐德电气工业公司 | Electric leakage circuit breaker |
| CN108321047A (en) * | 2018-02-02 | 2018-07-24 | 深圳曼顿科技有限公司 | Miniature circuit breaker with novel zero sequence mutual inductor installation structure |
| CN209328812U (en) * | 2019-01-25 | 2019-08-30 | 施耐德电器工业公司 | Earth leakage circuit breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114068251A (en) * | 2020-08-03 | 2022-02-18 | 天津首瑞智能电气有限公司 | Electric switch |
| CN114068251B (en) * | 2020-08-03 | 2024-04-26 | 天津首瑞智能电气有限公司 | Electric switch |
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