Busbar assembly and circuit breaker

Abstract

The utility model discloses a busbar assembly and a circuit breaker, and relates to the technical field of low-voltage electrical appliances, the busbar assembly is arranged on a frame, and the busbar assembly comprises a main conductive bar, a first conductive bar and a second conductive bar. And the main conductive bar is connected with the frame. The first conducting bar is arranged on the main conducting bar. The second conducting bar is arranged on the main conducting bar, and the second conducting bar and the first conducting bar are arranged at an interval. The first conducting bar and the second conducting bar extend towards the side away from the frame relative to the main conducting bar. According to the busbar assembly and the circuit breaker provided by the invention, the heat dissipation efficiency of the busbar can be improved, the risk of over-high temperature rise of the busbar is reduced, and the use safety of the circuit breaker is improved.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a busbar assembly and a circuit breaker. Background Art

[0002] The drawer type circuit breaker in the low voltage circuit breaker is a switchgear that can connect, carry and disconnect current. The drawer type circuit breaker includes a drawer seat, an operating mechanism, a contact system, a conductive system and an arc extinguishing system, among which the busbar in the conductive system is used to connect to the main circuit.

[0003] In the prior art, when current flows through the busbar, the temperature of the busbar will increase due to the thermal effect of the current. If the temperature is too high, the drawer-type circuit breaker may be damaged, thereby causing an electrical accident.

[0004] Therefore, it is urgent to provide a structure that is conducive to busbar heat dissipation to reduce the impact of the thermal effect of the current on the increase in busbar temperature and improve the overall safety of the drawer-type circuit breaker. Utility Model Content

[0005] The purpose of the present application is to provide a busbar assembly and a circuit breaker, which can improve the heat dissipation efficiency of the busbar, reduce the risk of excessive temperature rise of the busbar, and improve the safety of the circuit breaker.

[0006] In a first aspect, an embodiment of the present application provides a busbar assembly, which is arranged on a frame, and the busbar assembly includes: a main conductive bar, a first conductive bar, and a second conductive bar. The main conductive bar is connected to the inside of the frame. The first conductive bar is arranged on the main conductive bar. The second conductive bar is arranged on the main conductive bar, and the second conductive bar is spaced apart from the first conductive bar. The first conductive bar and the second conductive bar both extend toward a side away from the frame relative to the main conductive bar.

[0007] Based on the above-mentioned embodiments of the present application, the main conductive bar is connected to the frame to provide a stable support and conductive function. The first conductive bar and the second conductive bar are arranged on the main conductive bar for connecting the circuit. The first conductive bar and the second conductive bar both extend toward the side away from the frame relative to the main conductive bar, and the first conductive bar and the second conductive bar are arranged at intervals, which is conducive to air circulation at the first conductive bar and the second conductive bar, and improves the heat dissipation effect. At the same time, the busbar assembly also has the characteristics of simple structure and easy installation.

[0008] In an optional embodiment, the main conductive bar includes a first mounting portion and a second mounting portion, the first mounting portion and the second mounting portion are located on two opposite wall surfaces of the main conductive bar, the first conductive bar is mounted on the first mounting portion, and the second conductive bar is mounted on the second mounting portion.

[0009] Based on the above-mentioned embodiments of the present application, the provision of the first mounting portion and the second mounting portion can, on the one hand, locate the installation positions of the first conductive bar and the second conductive bar, ensuring that the first conductive bar and the second conductive bar are located on two opposite wall surfaces of the main conductive bar, so that the first conductive bar and the second conductive bar maintain a distance. On the other hand, it is convenient to assemble the first conductive bar and the second conductive bar with the main conductive bar.

[0010] In an optional embodiment, the first mounting portion is a first mounting groove provided on the main conductive bar, and the first conductive bar is provided with a first assembly portion, and the first assembly portion can be fixedly connected to the first mounting groove.

[0011] Based on the above-mentioned embodiments of the present application, the first mounting portion is set as the first mounting groove, which can play a role in positioning and mounting the first assembly portion, ensuring that the first conductive bar is stably mounted on the first mounting portion, so that the first conductive bar is located on the upper wall surface of the main conductive bar and maintains a spacing from the second conductive bar. The setting form of the first mounting groove is simple in structure and convenient for manufacturing, and the setting of the first mounting groove can reduce the thickness of the main conductive bar where it is connected to the first conductive bar, facilitate heat dissipation of the main conductive bar, avoid the situation of thermal stress concentration in the first mounting portion of the main conductive bar, and improve the stability of the main conductive bar.

[0012] In an optional embodiment, the second mounting portion is a second mounting groove arranged on the main conductive bar, the first mounting groove and the second mounting groove are arranged in opposite directions, and a second assembly portion is arranged on the second conductive bar, and the second assembly portion can be fixedly connected to the second mounting groove.

[0013] Based on the above-mentioned embodiments of the present application, the second mounting portion is set as a second mounting groove, which can play a role in positioning and mounting the second assembly portion, ensuring that the second conductive bar is stably mounted on the second mounting portion, so that the second conductive bar is located on the lower wall surface of the main conductive bar and maintains a spacing from the first conductive bar. The second mounting groove has a simple structure and is easy to manufacture, and the second mounting groove can reduce the thickness of the main conductive bar where it connects to the second conductive bar, which is convenient for heat dissipation of the main conductive bar, avoids the situation of thermal stress concentration in the second mounting portion of the main conductive bar, and improves the stability of the main conductive bar.

[0014] In an optional embodiment, the size of the first assembly portion matches the size of the first installation groove, and the size of the second assembly portion matches the size of the second installation groove.

[0015] Based on the above-mentioned embodiments of the present application, the sizes of the first assembly part and the first installation groove are adapted, so that the first assembly part can be accurately assembled to the first installation groove during assembly, avoiding the situation where the first assembly part and the first installation groove are installed unstably, and also avoiding the situation where the first assembly part is installed to the second installation groove. Similarly, the sizes of the second assembly part and the second installation groove are adapted, and have the same technical effects as the above-mentioned embodiments.

[0016] In an optional embodiment, the first assembly portion is welded to the main conductive bar and is at least partially located in the first mounting groove, and the second assembly portion is welded to the main conductive bar and is at least partially located in the second mounting groove.

[0017] Based on the above-mentioned embodiments of the present application, the welding method has a higher connection stability on the one hand, which can reduce the risk of the first conductive bar and the second conductive bar being separated from the main conductive bar, and improve the structural stability of the busbar assembly. On the other hand, it is conducive to improving the electrical connection stability between the first conductive bar and the second conductive bar and the main conductive bar, so that the busbar assembly maintains electrical connection with the main circuit. In addition, it is also conducive to improving the heat transfer efficiency between the first conductive bar and the second conductive bar and the main conductive bar, so that the heat on the main conductive bar can be transferred to the first conductive bar and the second conductive bar while the heat dissipation efficiency of the first conductive bar and the second conductive bar is improved, so as to dissipate the heat of the busbar assembly as a whole and reduce the risk of the busbar assembly caused by excessive temperature.

[0018] In an optional embodiment, the busbar assembly further includes a first connecting plate, a second connecting plate and at least one fastener connected to each other, the first connecting plate and the second connecting plate are arranged at an angle, the first connecting plate is connected to the main conductive bus, and the second connecting plate is connected to the frame.

[0019] Based on the above-mentioned embodiments of the present application, the arrangement of the first connecting plate, the second connecting plate and the fastener can stably connect the main conductive bar to the frame, and has the characteristics of simple structure and convenient assembly. At the same time, the first connecting plate and the second connecting plate are arranged at an angle, so that the main conductive bar, the first conductive bar and the second conductive bar can extend in a direction away from the frame after being connected to the frame. In addition, the first connecting plate and the second connecting plate have a relatively thin thickness while providing a stable connection, which has little effect on the heat dissipation effect of the main conductive bar, and is highly practical.

[0020] In a second aspect, an embodiment of the present application further provides a circuit breaker, comprising a frame and the above-mentioned busbar assembly, wherein the busbar assembly is connected to the frame.

[0021] Based on the above-mentioned embodiments of the present application, the heat dissipation efficiency of the busbar assembly of the circuit breaker having the above-mentioned busbar assembly is effectively improved, which is beneficial to improving the use stability and safety of the busbar assembly, thereby helping to reduce the impact of excessive temperature rise of the busbar assembly on other components in the circuit breaker, improving the overall stability of the circuit breaker, and extending the service life of the circuit breaker.

[0022] In an optional embodiment, the circuit breaker includes at least two groups of busbar assemblies arranged side by side, wherein one group of busbar assemblies is at least partially offset in a direction away from an adjacent busbar assembly.

[0023] Based on the above-mentioned embodiments of the present application, among the two groups of busbar assemblies arranged side by side, one group of busbar assemblies is at least partially offset in a direction away from the adjacent busbar assemblies. Such an arrangement can increase the spacing between the two groups of busbar assemblies arranged side by side without changing the installation position of the busbar assemblies, which is beneficial to enhancing the air flow between the two groups of busbar assemblies arranged side by side, thereby improving the heat dissipation efficiency of each of the two groups of busbar assemblies arranged side by side.

[0024] In an optional embodiment, the circuit breaker includes three groups of busbar assemblies arranged side by side, and the two groups of busbar assemblies located on both sides are at least partially offset in a direction away from the busbar assembly in the middle position.

[0025] Based on the above-mentioned embodiments of the present application, among the three groups of busbar assemblies arranged side by side, the two groups of busbar assemblies located on both sides are offset in the direction away from the busbar assembly in the middle position, which can greatly increase the spacing between the three groups of busbar assemblies, which is beneficial to improving the heat dissipation efficiency of the three groups of busbar assemblies arranged side by side. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the busbar assembly provided in an embodiment of the present application.

[0028] Figure 2 A schematic diagram of the structure of a circuit breaker connected to a main circuit provided in an embodiment of the present application.

[0029] Figure 3 A partial exploded view of the busbar assembly provided in an embodiment of the present application.

[0030] Figure 4 An exploded view of the busbar assembly provided in an embodiment of the present application.

[0031] Figure 5 A schematic diagram of the structure of an arc-starting plate provided on a busbar assembly provided in an embodiment of the present application.

[0032] Figure 6 A schematic diagram of the overall structure of a circuit breaker provided in an embodiment of the present application.

[0033] Figure 7 A schematic diagram of the structure of the connection between the busbar assembly and the contact system provided in an embodiment of the present application.

[0034] Figure 8A schematic diagram of the structure of multiple groups of busbar components arranged side by side provided in an embodiment of the present application.

[0035] Description of reference numerals:

[0036] 100-circuit breaker; 1-frame; 2-busbar assembly; 21-main conductive bar; 211-first mounting portion; 212-second mounting portion; 22-first conductive bar; 221-first assembly portion; 23-second conductive bar; 231-second assembly portion; 24-first connecting plate; 25-second connecting plate; 26-fastener; 3-main circuit; 4-contact system; 5-arcing plate; 6-static contact. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of this application, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0041] In the description of this application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The busbar assembly is a conductive component in a drawer-type circuit breaker used to electrically connect the main circuit. When the circuit breaker is in normal working condition, the current of the main circuit flows through the busbar assembly. During this process, the busbar assembly will produce temperature rise due to the thermal effect of the current.

[0043] In existing drawer-type circuit breakers, if the temperature of the busbar assembly rises too quickly or the heat is not dissipated in time, resulting in the busbar assembly being too hot, it is easy to cause damage to the busbar assembly or other components of the circuit breaker, affecting the overall safety of the circuit breaker.

[0044] Based on this, the embodiments of the present application provide a busbar assembly and a circuit breaker, which can improve the heat dissipation efficiency of the busbar, reduce the risk of excessive temperature rise of the busbar, and improve the safety of the circuit breaker.

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0046] Please refer to Figure 1 and Figure 2 This embodiment provides a busbar assembly 2, which is arranged on a frame 1. The busbar assembly 2 includes: a main conductive bar 21, a first conductive bar 22, and a second conductive bar 23. Figure 7 The main conductive bar 21 is connected to the bridge contact (i.e., the contact system 4) inside the frame 1. The first conductive bar 22 is arranged on the main conductive bar 21, and the second conductive bar 23 is arranged on the main conductive bar 21, and the second conductive bar 23 is arranged at a distance from the first conductive bar 22. The first conductive bar 22 and the second conductive bar 23 both extend toward a side away from the frame 1 relative to the main conductive bar 21.

[0047] Based on the above-mentioned embodiments of the present application, the main conductive bar 21 is connected to the bridge-shaped contact (i.e., the contact system 4) inside the frame 1 to provide a stable conductive function. The first conductive bar 22 and the second conductive bar 23 are arranged on the main conductive bar 21 for connecting the circuit. The first conductive bar 22 and the second conductive bar 23 both extend toward the side away from the frame 1 relative to the main conductive bar 21, and the first conductive bar 22 and the second conductive bar 23 are arranged at intervals, which is conducive to the air circulation at the first conductive bar 22 and the second conductive bar 23, and improves the heat dissipation effect. At the same time, the busbar assembly 2 also has the characteristics of simple structure and easy installation.

[0048] Specifically, refer to Figure 2 , the first side of the main conductive bar 21 extends to the inside of the frame 1, and the second side of the main conductive bar 21 opposite to the first side can be fixedly connected to the first conductive bar 22 and the second conductive bar 23. The busbar assembly 2 is connected to the circuit through the first conductive bar 22 and the second conductive bar 23, and there is a gap between the first conductive bar 22 and the second conductive bar 23. When the current in the circuit flows through the busbar assembly 2, the temperature of the busbar assembly 2 will increase under the thermal effect of the current. Compared with the traditional busbar set as a whole piece, this embodiment has a larger heat dissipation area, which is convenient for heat dissipation, and the gap between the first conductive bar 22 and the second conductive bar 23 is conducive to air circulation, which can further improve the heat dissipation efficiency.

[0049] In this embodiment, the main conductive bar 21 is preferably made of copper material with high conductivity to ensure good electrical and thermal conductivity. Its surface is usually silver-plated or gold-plated to improve corrosion resistance and oxidation resistance and extend service life.

[0050] The first conductive bar 22 and the second conductive bar 23 are also made of copper material with high conductivity, and their sizes and shapes can be customized according to circuit design requirements. They can be connected to the main conductive bar 21 by direct welding or by wires or other connectors to ensure the reliability and mechanical stability of the electrical connection.

[0051] Reference Figure 3 and Figure 4 In some embodiments, the main conductive bar 21 includes a first mounting portion 211 and a second mounting portion 212. The first mounting portion 211 and the second mounting portion 212 are located on two opposite wall surfaces of the main conductive bar 21. The first conductive bar 22 is mounted on the first mounting portion 211, and the second conductive bar 23 is mounted on the second mounting portion 212.

[0052] Based on the above-mentioned embodiments of the present application, the arrangement of the first mounting portion 211 and the second mounting portion 212 can, on the one hand, locate the installation positions of the first conductive bar 22 and the second conductive bar 23, ensuring that the first conductive bar 22 and the second conductive bar 23 are located on two opposite wall surfaces of the main conductive bar 21, so that the first conductive bar 22 and the second conductive bar 23 maintain a distance. On the other hand, it is convenient to assemble the first conductive bar 22 and the second conductive bar 23 with the main conductive bar 21.

[0053] Specifically, refer to Figure 3 The first mounting portion 211 and the second mounting portion 212 are arranged on the second side of the main conductive bar 21, that is, the side away from the frame 1, and the first mounting portion 211 and the second mounting portion 212 are arranged on the two opposite wall surfaces of the main conductive bar 21, that is, Figure 3In this way, the first conductive row 22 and the second conductive row 23 can be arranged at intervals on the upper and lower sides of the main conductive row 21, ensuring that the first conductive row 22 and the second conductive row 23 can maintain a distance, thereby ensuring the stability of the heat dissipation effect.

[0054] There are many ways to connect the first mounting portion 211 and the first conductive bar 22, for example, they can be connected by clamping or bolting. Similarly, the connection between the second mounting portion 212 and the second conductive bar 23 can be the same or different from the above.

[0055] Reference Figure 3 and Figure 4 In some embodiments, the first mounting portion 211 is a first mounting groove provided on the main conductive bar 21 , and a first assembly portion 221 is provided on the first conductive bar 22 , and the first assembly portion 221 can be fixedly connected to the first mounting groove.

[0056] Based on the above-mentioned embodiment of the present application, the first mounting portion 211 is set as the first mounting groove, which can play a role in positioning and mounting the first assembly portion 221, ensuring that the first conductive bar 22 is stably mounted on the main conductive bar 21, so that the first conductive bar 22 is located on the upper wall surface of the main conductive bar 21 and maintains a spacing from the second conductive bar 23. The setting form of the first mounting groove is simple in structure and convenient for manufacturing, and the setting of the first mounting groove can reduce the thickness of this part of the main conductive bar 21, facilitate the heat dissipation of the main conductive bar 21, avoid the situation of thermal stress concentration in the first mounting portion 211 of the main conductive bar 21, and improve the use stability of the main conductive bar 21.

[0057] Specifically, refer to Figure 3 The first mounting groove is set as a rectangular groove, located on the upper wall of the main conductive bar 21, and connected to the side wall of the main conductive bar 21 away from the frame 1. The first assembly portion 221 is an extension of the first conductive bar 22. The shape of the first assembly portion is the same as that of the first mounting groove. The first conductive bar 22 can be set as a flat plate structure. This arrangement of the first mounting groove and the first assembly portion 221 facilitates assembly, and can make the first conductive bar 22 fixedly connected to the main conductive bar 21 and extend in a direction away from the frame 1.

[0058] Similarly, refer to Figure 3 and Figure 4 The second mounting portion 212 is a second mounting groove arranged on the main conductive bar 21. The first mounting groove and the second mounting groove are arranged in opposite directions. The second conductive bar 23 is provided with a second assembly portion 231, and the second assembly portion 231 can be fixedly connected to the second mounting groove.

[0059] Based on the above-mentioned embodiment of the present application, the second mounting portion 212 is set as a second mounting groove, which can play a role in positioning and mounting the second assembly portion 231, ensuring that the second conductive bar 23 is stably mounted on the second mounting portion 212, so that the second conductive bar 23 is located on the lower wall surface of the main conductive bar 21, and maintains a spacing from the first conductive bar 22. The second mounting groove is simple in structure and convenient to manufacture, and the second mounting groove can reduce the thickness of the main conductive bar 21 at this part, which is convenient for heat dissipation of the main conductive bar 21, avoids the situation of thermal stress concentration in the second mounting portion 212 of the main conductive bar 21, and improves the use stability of the main conductive bar 21.

[0060] Specifically, refer to Figure 4 The second mounting groove can be the same as the first mounting groove, and is also a rectangular groove. The second mounting groove is arranged on the lower wall surface of the main conductive bar 21, and is also connected to the side wall of the main conductive bar 21 away from the frame 1. The second assembly portion 231 is an extension of the second conductive bar 23. The shape of the second assembly portion is the same as that of the second mounting groove. The second conductive bar 23 can be set to the same flat plate structure as the first conductive bar 22. Similarly, this arrangement of the second mounting groove and the second assembly portion 231 has the same technical effect as the aforementioned first mounting groove and the first assembly portion 221, and will not be repeated here.

[0061] In some embodiments, the size of the first assembly portion 221 matches the size of the first mounting groove, and the size of the second assembly portion 231 matches the size of the second mounting groove.

[0062] Based on the above-mentioned embodiment of the present application, the sizes of the first assembly part 221 and the first installation groove are matched, so that the first assembly part 221 can be accurately assembled to the first installation groove during assembly, avoiding the situation where the first assembly part 221 and the first installation groove are installed unstably, and also avoiding the situation where the first assembly part 221 is installed to the second installation groove. Similarly, the sizes of the second assembly part 231 and the second installation groove are matched, and have the same technical effects as the above-mentioned embodiment.

[0063] In some embodiments, the first assembly portion 221 is welded to the main conductive bar 21 and is at least partially located in the first mounting groove, and the second assembly portion 231 is welded to the main conductive bar 21 and is at least partially located in the second mounting groove.

[0064] Based on the above-mentioned embodiments of the present application, the welding method has a high connection stability on the one hand, which can reduce the risk of the first conductive bar 22 and the second conductive bar 23 being separated from the main conductive bar 21, and improve the structural stability of the busbar assembly 2. On the other hand, it is conducive to improving the electrical connection stability between the first conductive bar 22 and the second conductive bar 23 and the main conductive bar 21, so that the busbar assembly 2 maintains electrical connection with the main circuit 3. In addition, it is also conducive to improving the heat transfer efficiency between the first conductive bar 22 and the second conductive bar 23 and the main conductive bar 21, so that the heat on the main conductive bar 21 can be transferred to the first conductive bar 22 and the second conductive bar 23 while the heat dissipation efficiency is improved, so as to dissipate the heat of the busbar assembly 2 as a whole, and reduce the risk of the busbar assembly 2 being overheated.

[0065] In some embodiments, reference Figure 4 The busbar assembly 2 also includes a first connecting plate 24, a second connecting plate 25 and at least one fastener 26 connected to each other. The first connecting plate 24 and the second connecting plate 25 are arranged at an angle. The first connecting plate 24 is connected to the main conductive bar 21, and the second connecting plate 25 is connected to the frame 1.

[0066] Based on the above-mentioned embodiments of the present application, the arrangement of the first connecting plate 24, the second connecting plate 25 and the fastener 26 can stably connect the main conductive bar 21 to the frame 1, and has the characteristics of simple structure and convenient assembly. At the same time, the first connecting plate 24 and the second connecting plate 25 are arranged at an angle, so that the main conductive bar 21, the first conductive bar 22 and the second conductive bar 23 can extend in a direction away from the frame 1 after being connected to the frame 1. In addition, the first connecting plate 24 and the second connecting plate 25 provide a stable connection, and because of their thin thickness, they have little effect on the heat dissipation effect of the main conductive bar 21, and are highly practical.

[0067] Specifically, refer to Figure 4 The first connecting plate 24 and the second connecting plate 25 are perpendicular to each other. The first connecting plate 24 is parallel to the upper wall of the main conductive bar 21 and is connected to the upper wall through the fastener 26, and the second connecting plate 25 is perpendicular to the upper wall of the main conductive bar 21 and is connected to the frame 1 through the fastener 26, so as to provide a stable assembly without affecting the heat dissipation of the main conductive bar 21.

[0068] Among them, the bent parts of the first connecting plate 24 and the second connecting plate 25 can be partially blocked at the notch of the first mounting groove, which can limit the first assembly part 221 installed in the first mounting groove, and further improve the assembly stability of the first conductive bar 22 and the main conductive bar 21.

[0069] Reference Figure 4, the first connecting plate 24, the second connecting plate 25 and the fastener 26 can be provided in two groups, one group is provided on the upper wall surface of the main conductive bar 21, and the other group is provided on the lower wall surface of the main conductive bar 21, through which the main conductive bar 21 can be more stably connected to the frame 1. At the same time, the bending part of the first connecting plate 24 and the second connecting plate 25 located on the lower wall surface can be partially blocked at the notch of the second mounting groove, which can limit the second assembly part 231 installed in the second mounting groove, and further improve the assembly stability of the second conductive bar 23 and the main conductive bar 21.

[0070] In an alternative embodiment, referring to Figure 5 The busbar assembly 2 can also be connected to an arc-striking plate 5 and a static contact 6. The arc-striking plate 5 can be fixed to the upper wall of the main conductive bar 21 together with the first connecting plate 24. The static contact 6 can be arranged on the side wall of the main conductive bar 21 facing the frame 1 so that the moving contact in the frame 1 contacts the static contact 6. The specific contact method is the existing technology and will not be repeated here.

[0071] Reference Figure 6 The embodiment of the present application further provides a circuit breaker 100 , comprising a frame 1 and the above-mentioned busbar assembly 2 , wherein the busbar assembly 2 is connected to the frame 1 .

[0072] Based on the above-mentioned embodiments of the present application, the circuit breaker 100 having the above-mentioned busbar assembly 2 has the heat dissipation efficiency of the busbar assembly 2 effectively improved, which is beneficial to improving the use stability and safety of the busbar assembly 2, thereby helping to reduce the impact of excessive temperature rise of the busbar assembly 2 on other components in the circuit breaker 100, improving the overall stability of the circuit breaker 100, and extending the service life of the circuit breaker 100.

[0073] Specifically, refer to Figure 6 The busbar assembly 2 is arranged on the frame 1, the main conductive bar 21 in the busbar assembly 2 is fixedly connected to the frame 1, and the first conductive bar 22 and the second conductive bar 23 in the busbar assembly 2 are used to be electrically connected to the main circuit 3. By arranging the first conductive bar 22 and the second conductive bar 23 on the main conductive bar 21 at intervals, compared with the traditional integrated busbar, the embodiment of the present application can increase the spacing and heat dissipation area of ​​the first conductive bar 22 and the second conductive bar 23, so as to enhance the heat exchange effect between the first conductive bar 22 and the second conductive bar 23 and the surrounding air, thereby improving the heat dissipation efficiency of the first conductive bar 22 and the second conductive bar 23.

[0074] The improvement of the heat dissipation efficiency of the first conductive bar 22 and the second conductive bar 23 allows the temperature on the main conductive bar 21 to be transferred to the first conductive bar 22 and the second conductive bar 23, thereby reducing the temperature rise of the main conductive bar 21. In this way, the overall heat dissipation efficiency of the busbar assembly 2 is improved, which is conducive to improving the use stability of the busbar assembly 2 and extending the service life of the busbar assembly 2.

[0075] Reference Figure 7 The circuit breaker 100 also includes a contact system 4. After the main conductive bus 21 is connected to the frame 1, it can be connected and conducted with the contact system 4. The improvement of the overall heat dissipation efficiency of the busbar assembly 2 not only reduces the temperature of the busbar assembly 2, but also helps to reduce the temperature of the contact system 4 connected to the busbar assembly 2, so as to reduce the risk of failure of the contact system 4 due to excessive temperature, which is beneficial to improving the overall reliability and safety of the circuit breaker 100 and extending the service life of the circuit breaker 100.

[0076] In some embodiments, reference Figure 6 The circuit breaker 100 includes at least two groups of busbar assemblies 2 arranged side by side, wherein one group of busbar assemblies 2 is at least partially offset in a direction away from an adjacent busbar assembly 2 .

[0077] Based on the above-mentioned embodiments of the present application, there are two groups of busbar assemblies arranged side by side, in which one group of busbar assemblies 2 is at least partially offset in a direction away from the adjacent busbar assembly 2. Such an arrangement can increase the spacing between the two groups of busbar assemblies 2 arranged side by side without changing the installation position of the busbar assembly 2, which is beneficial to enhancing the air flow between the two groups of busbar assemblies 2 arranged side by side, thereby improving the heat dissipation efficiency of each of the two groups of busbar assemblies 2 arranged side by side.

[0078] In another embodiment, in two groups of busbar assemblies 2 arranged side by side, the two groups of busbar assemblies 2 can be simultaneously offset in directions away from each other, which can further expand the distance between the two groups of busbar assemblies 2 arranged side by side, thereby further improving the heat dissipation efficiency.

[0079] Among them, the main conductive bar 21 in the busbar assembly 2 needs to be fixedly connected to the frame 1, so the busbar assembly 2 can at least partially shift, and the first conductive bar 22 or the second conductive bar 23 can shift in the direction away from the adjacent busbar assembly 2, or the first conductive bar 22 and the second conductive bar 23 can shift in the direction away from the adjacent busbar assembly 2 at the same time, both of which can achieve the purpose of improving the heat dissipation efficiency.

[0080] In addition, the direction of partial offset of the busbar assembly 2 can also be any direction away from the adjacent busbar assembly 2, as long as the busbar assembly 2 is convenient for wiring and increases the distance between adjacent busbar assemblies 2. The specific direction is not further limited in this application.

[0081] In an optional embodiment, when three or more busbar assemblies 2 are arranged side by side on the circuit breaker 100, adjacent busbar assemblies 2 can be partially offset in directions away from each other, or the busbar assemblies 2 on both sides can be offset in a direction away from the busbar assembly 2 in the middle position. The above-mentioned effect can also be achieved. The specific implementation method can be found below.

[0082] Reference Figure 8 In some embodiments, the circuit breaker 100 includes three groups of busbar assemblies 2 arranged side by side, and the two groups of busbar assemblies 2 located on both sides are at least partially offset in a direction away from the busbar assembly 2 in the middle position.

[0083] Based on the above-mentioned embodiments of the present application, among the three groups of busbar assemblies 2 arranged side by side, the two groups of busbar assemblies 2 located on both sides are offset in the direction away from the busbar assembly 2 in the middle position, which can greatly increase the spacing between the three groups of busbar assemblies 2, which is beneficial to improving the heat dissipation efficiency of the three groups of busbar assemblies 2 arranged side by side.

[0084] Specifically, three groups of busbar assemblies 2 are arranged side by side on the frame 1. The main conductive bar 21 of the busbar assembly 2 located in the middle position is fixedly connected to the frame 1, and the first conductive bar 22 and the second conductive bar 23 are not offset relative to the main conductive bar 21. The main conductive bar 21 of the two groups of busbar assemblies 2 located on both sides is fixedly connected to the frame 1, wherein the first assembly portion 221 on the first conductive bar 22 is fixedly connected to the first mounting groove on the main conductive bar 21, and the remaining part of the first conductive bar 22 is offset in the direction away from the busbar assembly 2 in the middle position. The second assembly portion 231 on the second conductive bar 23 is fixedly connected to the second mounting groove on the main conductive bar 21, and the remaining part of the second conductive bar 23 is also offset in the direction away from the busbar assembly 2 in the middle position, so as to achieve the effect of increasing the spacing between the three groups of busbar assemblies 2 arranged side by side, with a simple structure, and effectively improving the heat dissipation efficiency of the busbar assembly 2 without affecting the assembly and wiring of the busbar assembly 2.

[0085] In the embodiments of this application, refer to Figure 6 and Figure 8 , six groups of busbar assemblies 2 are arranged on the frame 1, and the six groups of busbar assemblies 2 are arranged in two rows, with three groups of busbar assemblies 2 in each row. The above arrangement can improve the heat dissipation effect of the three groups of busbar assemblies 2 in each row, thereby helping to reduce the overall temperature rise of the circuit breaker 100. In summary, by improving the heat dissipation efficiency of the busbar assembly 2 itself and enhancing the heat dissipation effect of multiple groups of busbar assemblies 2 arranged side by side, the overall temperature rise of the circuit breaker 100 can be effectively reduced, and the use safety of the circuit breaker 100 can be improved.

[0086] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A busbar assembly, characterized in that: Arranged on the frame, the busbar assembly comprises: A main conductive bar connected to the frame; A first conductive bar, disposed on the main conductive bar; A second conductive bar, disposed on the main conductive bar, wherein the second conductive bar is spaced apart from the first conductive bar; The first conductive bar and the second conductive bar both extend toward a side away from the frame relative to the main conductive bar.

2. The busbar assembly according to claim 1, characterized in that: The main conductive bar includes a first mounting portion and a second mounting portion, wherein the first mounting portion and the second mounting portion are located on two opposite wall surfaces of the main conductive bar, the first conductive bar is mounted on the first mounting portion, and the second conductive bar is mounted on the second mounting portion.

3. The busbar assembly according to claim 2, characterized in that: The first mounting portion is a first mounting groove provided on the main conductive bar. The first conductive bar is provided with a first assembly portion, and the first assembly portion can be fixedly connected to the first mounting groove.

4. The busbar assembly according to claim 3, characterized in that: The second mounting portion is a second mounting groove arranged on the main conductive bar, the first mounting groove and the second mounting groove are arranged in opposite directions, and a second assembly portion is arranged on the second conductive bar, and the second assembly portion can be fixedly connected to the second mounting groove.

5. The busbar assembly according to claim 4, characterized in that: The size of the first assembly portion matches the size of the first installation groove, and the size of the second assembly portion matches the size of the second installation groove.

6. The busbar assembly according to claim 5, characterized in that: The first assembly portion is welded to the main conductive bar and is at least partially located in the first mounting groove, and the second assembly portion is welded to the main conductive bar and is at least partially located in the second mounting groove.

7. The busbar assembly according to any one of claims 1 to 6, characterized in that: The busbar assembly also includes a first connecting plate, a second connecting plate and at least one fastener connected to each other, the first connecting plate and the second connecting plate are arranged at an angle, the first connecting plate is connected to the main conductive bar, and the second connecting plate is connected to the frame.

8. A circuit breaker, characterized in that: It comprises a frame and a busbar assembly as claimed in any one of claims 1 to 7, wherein the busbar assembly is connected to the frame.

9. The circuit breaker according to claim 8, characterized in that The circuit breaker comprises at least two groups of busbar assemblies arranged side by side, wherein one group of busbar assemblies is at least partially offset in a direction away from an adjacent busbar assembly.

10. The circuit breaker according to claim 9, characterized in that The circuit breaker comprises three groups of busbar assemblies arranged side by side, and the two groups of busbar assemblies located on both sides are at least partially offset in a direction away from the busbar assembly at a middle position.

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