A new type of molded case circuit breaker

Abstract

The utility model relates to a novel moulded case circuit breaker, including casing, A phase circuit, B phase circuit and C phase circuit, A phase circuit, B phase circuit and C phase circuit distribute from top to bottom in casing in proper order, and leave the interval between A phase circuit and B phase circuit, leave the interval between B phase circuit and C phase circuit. The utility model discloses through A phase circuit, B phase circuit and C phase circuit distribute from top to bottom in casing in proper order, make the miniaturization of moulded case circuit breaker in horizontal direction, reduce the space occupation of moulded case circuit breaker in horizontal direction, be suitable for a variety of occasions to moulded case circuit breaker horizontal dimension have the requirement.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, and more particularly to a novel molded case circuit breaker. Background Technology

[0002] Existing low-voltage cable distribution boxes conventionally use square molded case circuit breakers (MCCBs). In this type of MCCB, the three sets of contacts are arranged horizontally from left to right. This means the three-phase circuits in existing MCCBs are distributed horizontally from left to right. This horizontal distribution of the three-phase circuits occupies lateral space. For example, the width of a conventional 250A MCCB is 107mm, a 400A MCCB is 150mm, and a 630A MCCB is 210mm. Typically, the width of a seven-circuit low-voltage cable distribution box reaches 1200mm. These existing horizontally distributed MCCBs occupy a large amount of lateral space when used outdoors, reducing the floor space available for other applications and decreasing the adaptability of the MCCBs. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Therefore, this utility model proposes a novel molded case circuit breaker.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a novel molded case circuit breaker, including a housing, an A-phase circuit, a B-phase circuit and a C-phase circuit, wherein the A-phase circuit, the B-phase circuit and the C-phase circuit are distributed sequentially from top to bottom in the housing, and a gap is left between the A-phase circuit and the B-phase circuit, and a gap is left between the B-phase circuit and the C-phase circuit. Phase A circuit includes a first moving contact and a first stationary contact, wherein the first moving contact is electrically connected to a first conductive terminal through a first current transformer; The B-phase circuit includes a second moving contact and a second stationary contact, wherein the second moving contact is electrically connected to the second conductive terminal through a second current transformer; The C-phase circuit includes a third moving contact and a third stationary contact, wherein the third moving contact is connected to a third conductive terminal through a third current transformer; The first stationary contact, the second stationary contact, and the third stationary contact are respectively electrically connected to the corresponding busbar; the first conductive terminal, the second conductive terminal, and the third conductive terminal are respectively connected to an external power supply. The A-phase circuit, B-phase circuit, and C-phase circuit are controlled individually by their respective single-phase switching assemblies, or the A-phase circuit, B-phase circuit, and C-phase circuit are controlled synchronously by their three-phase circuit switching assemblies.

[0005] In a preferred embodiment of this utility model, the single-phase splitting and connecting assembly includes an A-phase splitting and connecting mechanism, a B-phase splitting and connecting mechanism, and a C-phase splitting and connecting mechanism; the A-phase splitting and connecting mechanism includes a first handle, a first moving contact connected to the first handle, and the first handle controls the splitting and connecting between the first moving contact and the first stationary contact; the B-phase splitting and connecting mechanism includes a second handle, a second moving contact connected to the second handle, and the second handle controls the splitting and connecting between the second moving contact and the second stationary contact; the C-phase splitting and connecting mechanism includes a third handle, a third moving contact connected to the third handle, and the third handle controls the splitting and connecting between the third moving contact and the third stationary contact.

[0006] In a preferred embodiment of this utility model, the three-phase linkage opening and closing assembly includes a linkage handle and a linkage mechanism. The linkage mechanism is connected to the first moving contact, the second moving contact, and the third moving contact, respectively. The linkage handle is connected to the linkage mechanism via an iron component. The linkage handle is installed on the A-phase circuit, the B-phase circuit, or the C-phase circuit. The linkage handle drives the linkage mechanism to synchronously open and close the first moving contact, the second moving contact, and the third moving contact with the first stationary contact, the second stationary contact, and the third stationary contact.

[0007] In a preferred embodiment of this utility model, the linkage mechanism is a handle linkage, and the linkage mechanism is vertically arranged.

[0008] In a preferred embodiment of this utility model, a first stationary contact terminal, a second stationary contact terminal, and a third stationary contact terminal are sequentially provided on the housing from top to bottom; the first stationary contact is electrically connected to the busbar through the first stationary contact terminal, the second stationary contact is electrically connected to the busbar through the second stationary contact terminal, and the third stationary contact is electrically connected to the busbar through the third stationary contact terminal.

[0009] In a preferred embodiment of this utility model, the spacing between the A-phase circuit and the B-phase circuit is 120-250mm, and the spacing between the B-phase circuit and the C-phase circuit is 120-250mm.

[0010] In a preferred embodiment of this utility model, the width of the housing is 50-150 mm.

[0011] In a preferred embodiment of this utility model, the height of the shell is 500-700mm.

[0012] In a preferred embodiment of this utility model, the housing is made of flame-retardant insulating material.

[0013] The beneficial effects of this utility model are: by distributing the A-phase circuit, B-phase circuit and C-phase circuit sequentially from top to bottom inside the housing, this utility model enables the molded case circuit breaker to be miniaturized in the lateral direction, reducing the space occupied by the molded case circuit breaker in the lateral direction, and adapting to various occasions where there are requirements for the lateral dimensions of the molded case circuit breaker. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the shell structure of Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 4 This is a schematic diagram of the shell structure of Embodiment 2 of this utility model. Figure 5 This is a schematic diagram of the principle structure of this utility model; In the diagram: Phase A circuit 1; First current transformer 101; First conductive terminal 102; First moving contact 103; First stationary contact 104; First handle 105; Phase B circuit 2; Second current transformer 201; Second conductive terminal 202; Second moving contact 203; Second stationary contact 204; Second handle 205; Phase C circuit 3; Third current transformer 301; Third conductive terminal 302; Third moving contact 303; Third stationary contact 304; Third handle 305; Housing 4; First stationary contact terminal 401; Second stationary contact terminal 402; Third stationary contact terminal 403; Linkage handle 501; Linkage mechanism 502. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0016] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0017] Example 1: like Figure 1 , Figure 2 and Figure 5 The present invention discloses a novel molded case circuit breaker, comprising a housing 4, an A-phase circuit 1, a B-phase circuit 2, and a C-phase circuit 3. The A-phase circuit 1, B-phase circuit 2, and C-phase circuit 3 are arranged sequentially from top to bottom within the housing 4, with a gap between the A-phase circuit 1 and the B-phase circuit 2, and a gap between the B-phase circuit 2 and the C-phase circuit 3. Phase A circuit 1 includes a first moving contact 103 and a first stationary contact 104. The first moving contact 103 is electrically connected to the first conductive terminal 102 through the first current transformer 101. Phase B circuit 2 includes a second moving contact 203 and a second stationary contact 204. The second moving contact 203 is electrically connected to the second conductive terminal 202 through the second current transformer 201. The C-phase circuit 3 includes a third moving contact 303 and a third stationary contact 304. The third moving contact 303 is connected to the third conductive terminal 302 through a third current transformer 301. The first stationary contact 104, the second stationary contact 204, and the third stationary contact 304 are respectively electrically connected to the corresponding busbar; the first conductive terminal 102, the second conductive terminal 202, and the third conductive terminal 302 are respectively connected to an external power supply. The A-phase circuit 1, B-phase circuit 2, and C-phase circuit 3 are controlled individually by their respective single-phase switching assemblies, or the A-phase circuit 1, B-phase circuit 2, and C-phase circuit 3 are controlled synchronously by their three-phase circuit switching assemblies.

[0018] In a preferred embodiment, the single-phase switching assembly of this application includes an A-phase switching mechanism, a B-phase switching mechanism, and a C-phase switching mechanism; the A-phase switching mechanism includes a first handle 105, a first moving contact 103 connected to the first handle 105, and the first handle 105 controls the switching between the first moving contact 103 and the first stationary contact 104; the B-phase switching mechanism includes a second handle 205, a second moving contact 203 connected to the second handle 205, and the second handle 205 controls the switching between the second moving contact 203 and the second stationary contact 204; the C-phase switching mechanism includes a third handle 305, a third moving contact 303 connected to the third handle 305, and the third handle 305 controls the switching between the third moving contact 303 and the third stationary contact 304.

[0019] This utility model discloses a novel molded case circuit breaker that arranges the three-phase power supply from left to right in the current left-middle-right arrangement to a top-middle-bottom arrangement within the casing. This significantly shortens the width of the molded case circuit breaker, reduces the lateral space occupied, and achieves miniaturization, making it more adaptable to various applications, improving aesthetics, and increasing the space available for other outdoor uses. The A-phase circuit 1, distributed top-middle-bottom, is controlled by a first handle 105 to open and close the first moving contact 103 and the first stationary contact 104; the B-phase circuit 2 is controlled by a second handle 205 to open and close the second moving contact 203 and the second stationary contact 204; and the C-phase circuit 3 is controlled by a third handle 305 to open and close the third moving contact 303 and the third stationary contact 304. This allows for individual control of each phase circuit, facilitating individual inspection and maintenance. Furthermore, the spacing between adjacent phase circuits facilitates rapid heat dissipation, ensuring high safety and preventing changes in the physical and chemical properties of components in each phase circuit, thus avoiding degradation of the mechanical and electrical performance of the switch.

[0020] Example 2: like Figures 3 to 5 As shown, the novel molded case circuit breaker in this application can also synchronously control the opening and closing actions of the three-phase circuit through a three-phase linkage opening and closing assembly. The three-phase linkage opening and closing assembly includes a linkage handle 501 and a linkage mechanism 502. The linkage mechanism 502 is connected to the first moving contact 103, the second moving contact 203, and the third moving contact 303, respectively. The linkage handle 501 is connected to the linkage mechanism 502 through an iron part. The linkage handle 501 is set on the A-phase circuit 1, the B-phase circuit 2, or the C-phase circuit 3. The linkage handle 501 drives the linkage mechanism 502 to drive the first moving contact 103, the second moving contact 203, and the third moving contact 303 to synchronously perform opening and closing actions with the first stationary contact 104, the second stationary contact 204, and the third stationary contact 304.

[0021] The three-phase linkage opening and closing assembly achieves the linkage control of phase A circuit 1, phase B circuit 2, and phase C circuit 3, which is convenient to control, simple to operate, and improves the control efficiency of the three-phase circuit. More preferably, the linkage mechanism 502 in this application is a handle linkage rod, which is vertically arranged, and the first moving contact 103, the second moving contact 203, and the third moving contact 303 are respectively fixedly mounted on the handle linkage rod. That is, by driving the linkage handle 501 downward or upward, the linkage handle 501 drives the handle linkage rod, realizing the synchronous action of the first moving contact 103, the second moving contact 203, and the third moving contact 303, which facilitates the synchronous opening and closing of the first moving contact 103 and the first stationary contact 104, the second moving contact 203 and the second stationary contact 204, and the third moving contact 303 and the third stationary contact 304, thereby improving the opening and closing efficiency of the three-phase circuit.

[0022] In a preferred embodiment, the housing 4 is provided with a first stationary contact terminal 401, a second stationary contact terminal 402, and a third stationary contact terminal 403 sequentially from top to bottom; the first stationary contact 104 is electrically connected to the busbar through the first stationary contact terminal 401, the second stationary contact 204 is electrically connected to the busbar through the second stationary contact terminal 402, and the third stationary contact 304 is electrically connected to the busbar through the third stationary contact terminal 403.

[0023] In existing horizontally distributed three-phase switches (left, middle, and right), the spacing between the three sets of contacts is relatively short. When the switchgear is in operation, the heat generated accumulates, affecting not only the temperature rise test of the low-voltage cable branch box assembly but also causing changes in the physical and chemical properties of component materials, leading to a decline in the mechanical and electrical performance of the switch. In this application, the three-phase circuits are vertically distributed (top, middle, and bottom). The spacing between phase A circuit 1 and phase B circuit 2 is 120–250 mm, and the spacing between phase B circuit 2 and phase C circuit 3 is also 120–250 mm. More preferably, the spacing between phase A circuit 1 and phase B circuit 2 is 150 mm, and the spacing between phase B circuit 2 and phase C circuit 3 is 150 mm. This spacing between adjacent phases allows heat generated in each phase to dissipate promptly, improving the safety of each phase and preventing a decline in the mechanical and electrical performance of the switch due to high temperatures. By adopting the above spacing between adjacent two-phase circuits, not only is the distance between the three sets of contacts of the components increased, reducing the interaction of internal heat during the operation of the components and lowering the temperature rise, but the width of the low-voltage cable branch box enclosure and the length of the busbar can also be effectively reduced, reducing resource consumption and lowering the processing cost of the complete set of equipment.

[0024] In a preferred embodiment, the width of the housing 4 in this application is 50-150 mm. This application changes the three-phase circuit from a left-middle-right horizontal arrangement to a top-middle-bottom vertical arrangement. The vertically arranged three-phase circuit occupies less horizontal space compared to the horizontally arranged three-phase circuit, resulting in a smaller lateral size of the molded case circuit breaker and reducing its lateral space requirement. This adapts to various applications with specific requirements for the lateral dimensions of the molded case circuit breaker, improving its versatility. More preferably, the height of the housing 4 in this application is 500-700 mm. Depending on the model of the molded case circuit breaker, the height and length of the housing will vary within the above range.

[0025] The housing 4 described in this application is made of flame-retardant insulating material, such as flame-retardant nylon or DMC insulating material, which helps to improve the safety of molded case circuit breakers.

[0026] like Figure 3 As shown, this application takes a cable branch box, AC400V, seven-channel, with an incoming molded case circuit breaker of 630A and an outgoing molded case circuit breaker of 250A*6 as an example: The low-voltage cable branch box is installed and fixed using a strip molded case circuit breaker. The three-phase circuit is distributed vertically in the middle and lower parts of the box. The width of the low-voltage cable branch box shell can be reduced to 600mm, which effectively reduces the width of the box shell and the length of the busbar, reduces the footprint of the cable branch box foundation, increases the greening rate, and is environmentally friendly and aesthetically pleasing.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0028] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A novel molded case circuit breaker, characterized in that, It includes a housing (4), an A-phase circuit (1), a B-phase circuit (2), and a C-phase circuit (3). The A-phase circuit (1), B-phase circuit (2), and C-phase circuit (3) are distributed from top to bottom in the housing (4), and there is a gap between the A-phase circuit (1) and the B-phase circuit (2), and a gap between the B-phase circuit (2) and the C-phase circuit (3). Phase A circuit (1) includes a first moving contact (103) and a first stationary contact (104). The first moving contact (103) is electrically connected to the first conductive terminal (102) through a first current transformer (101). The B-phase circuit (2) includes a second moving contact (203) and a second stationary contact (204). The second moving contact (203) is electrically connected to the second conductive terminal (202) through the second current transformer (201). The C-phase circuit (3) includes a third moving contact (303) and a third stationary contact (304), wherein the third moving contact (303) is connected to the third conductive terminal (302) through a third current transformer (301). The first stationary contact (104), the second stationary contact (204), and the third stationary contact (304) are respectively connected to the corresponding busbars; the first conductive terminal (102), the second conductive terminal (202), and the third conductive terminal (302) are respectively connected to an external power source; The A-phase circuit (1), B-phase circuit (2) and C-phase circuit (3) are controlled individually by the corresponding single-phase circuit assemblies, or the A-phase circuit (1), B-phase circuit (2) and C-phase circuit (3) are controlled synchronously by the three-phase circuit assemblies.

2. The novel molded case circuit breaker according to claim 1, characterized in that, The single-phase splitting and connecting assembly includes an A-phase splitting and connecting mechanism, a B-phase splitting and connecting mechanism, and a C-phase splitting and connecting mechanism; the A-phase splitting and connecting mechanism includes a first handle (105), the first moving contact (103) is connected to the first handle (105), and the first handle (105) controls the splitting and connecting between the first moving contact (103) and the first stationary contact (104); the B-phase splitting and connecting mechanism includes a second handle (205), the second moving contact (203) is connected to the second handle (205), and the second handle (205) controls the splitting and connecting between the second moving contact (203) and the second stationary contact (204); the C-phase splitting and connecting mechanism includes a third handle (305), the third moving contact (303) is connected to the third handle (305), and the third handle (305) controls the splitting and connecting between the third moving contact (303) and the third stationary contact (304).

3. The novel molded case circuit breaker according to claim 1, characterized in that, The three-phase linkage opening and closing assembly includes a linkage handle (501) and a linkage mechanism (502). The linkage mechanism (502) is connected to the first moving contact (103), the second moving contact (203), and the third moving contact (303) respectively. The linkage handle (501) is connected to the linkage mechanism (502) through an iron part. The linkage handle (501) is set on the A-phase circuit (1), the B-phase circuit (2), or the C-phase circuit (3). The linkage handle (501) drives the linkage mechanism (502) to drive the first moving contact (103), the second moving contact (203), and the third moving contact (303) to perform opening and closing actions synchronously with the first stationary contact (104), the second stationary contact (204), and the third stationary contact (304).

4. The novel molded case circuit breaker according to claim 3, characterized in that, The linkage mechanism (502) is a handle link, and the linkage mechanism (502) is vertically arranged.

5. The novel molded case circuit breaker according to claim 1, characterized in that, The housing (4) is provided with a first stationary contact terminal (401), a second stationary contact terminal (402) and a third stationary contact terminal (403) in sequence from top to bottom; the first stationary contact (204) is electrically connected to the busbar through the first stationary contact terminal (401), the second stationary contact (204) is electrically connected to the busbar through the second stationary contact terminal (402), and the third stationary contact (304) is electrically connected to the busbar through the third stationary contact terminal (403).

6. The novel molded case circuit breaker according to claim 1, characterized in that, The distance between phase A circuit (1) and phase B circuit (2) is 120-250 mm, and the distance between phase B circuit (2) and phase C circuit (3) is 120-250 mm.

7. The novel molded case circuit breaker according to claim 1, characterized in that, The width of the housing (4) is 50-150 mm.

8. The novel molded case circuit breaker according to claim 6, characterized in that, The height of the shell (4) is 500-700mm.

9. The novel molded case circuit breaker according to claim 1, characterized in that, The housing (4) is made of flame-retardant insulating material.

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