All-copper-bar circuit breaker group cabinet

Abstract

The all-copper-bar circuit breaker cabinet comprises a cabinet body, a screen top busbar is arranged above the cabinet body, and an alternating-current inlet wire penetrates through the screen top of the cabinet body to form the screen top busbar; a plurality of circuit breaker groups arranged in rows are arranged in the cabinet body, and different circuit breaker groups are connected through vertical copper bars; the screen top busbar is connected with the uppermost circuit breaker group in the cabinet body through a switching copper bar; the circuit breaker group comprises a mounting plate transversely mounted in the cabinet body, and a plurality of circuit breakers are arranged on the mounting plate; three-phase interfaces above the circuit breaker are connected together through a copper bus bar; and the bus copper bar of the uppermost circuit breaker group in the cabinet body is connected with the switching copper bar, and the bus copper bars of the other circuit breaker groups are connected with the vertical copper bars.

Description

Technical Field

[0001] The invention belongs to the technical field of electrical equipment, and in particular relates to an all-copper busbar circuit breaker cabinet. Background Art

[0002] A circuit breaker is an electrical device that functions as both a manual switch and automatically provides protection against loss of voltage, undervoltage, overload, and short-circuit. It distributes electrical energy, infrequently starts asynchronous motors, and protects power lines and motors. It automatically disconnects the circuit in the event of a severe overload, short circuit, or undervoltage fault. Its functionality is equivalent to a combination of a fuse-type switch and an over- and under-temperature relay. The safe and stable operation of substation feeders is crucial for the normal operation of power systems. Traditional circuit breaker panels typically connect the circuit breaker to the shorting busbar with a cable or use individual busbar connections for each phase.

[0003] The prior art patent with publication number CN221961413U discloses a generator output circuit breaker cabinet, in which multiple isolation plates are fixed in the cabinet shell to divide the internal space of the cabinet shell into multiple compartments. The compartments include a primary component compartment, which includes a circuit breaker compartment. The circuit breaker compartment is used to accommodate circuit breakers, wherein the circuit breakers include circuit breakers with a rated current greater than or equal to 5000A. The damping of the vibration isolator is greater than the preset damping, and at the resonant frequency, the amplification factor of the vibration isolator is less than or equal to 3.5. In this way, the accommodating volume of the circuit breaker compartment can accommodate circuit breakers with a rated current greater than or equal to 5000A. At the same time, the damping of the vibration isolator is greater than the preset damping, and at the resonant frequency, the amplification factor of the vibration isolator is less than or equal to 3.5, which can meet the vibration isolation function of the cabinet and ensure the normal operation of the circuit breaker in marine environmental conditions. Summary of the Invention

[0004] The safe and stable operation of substation feeders is crucial for the normal operation of power systems. Traditional circuit breaker panels typically connect the circuit breaker to the shorting busbar with cables or use separate busbar connections for each phase. This approach presents the following problems: 1. The numerous connection points increase the number of fault points and maintenance complexity. 2. The improper busbar layout leads to uneven current distribution and poor heat dissipation, impacting system stability and safety. 3. The complex panel structure and the large amount of cables and busbars required make installation and maintenance inconvenient.

[0005] In order to solve the above problems, the technical solution provided by the present invention is: an all-copper busbar circuit breaker group cabinet, including a cabinet body, with an AC input line passing through the top of the cabinet screen busbar above the cabinet body; a plurality of circuit breaker groups arranged in rows are provided in the cabinet body, and different circuit breaker groups are connected by vertical copper busbars; the top busbar is connected to the topmost circuit breaker group in the cabinet body by a transfer copper busbar; and the vertical copper busbar is connected to the transfer copper busbar.

[0006] Specifically, the circuit breaker group includes a mounting plate installed horizontally inside the cabinet, on which several circuit breakers are installed; the three-connected interfaces above the circuit breaker are connected together through a busbar; the busbar includes an A-phase busbar, a B-phase busbar, and a C-phase busbar; the busbar of the top circuit breaker group inside the cabinet is connected to the transfer busbar, and the busbars of other circuit breaker groups are connected to the vertical busbar.

[0007] Specifically, the connection between the busbar and the transfer busbar or vertical busbar is equipped with a fixed foot with a curved structure. The fixed foot of the phase A busbar is bent inward, the fixed foot of the phase B busbar is not bent, and the fixed foot of the phase C busbar is bent outward. The spacing between the fixed feet of the three-phase busbar exceeds the safe electrical distance. The tail of each phase of the three-phase busbar is also bent and turned, and the vertical busbar is overlapped in a staggered layer.

[0008] Specifically, insulators are installed at intervals on the busbars to ensure the electrical clearance between the three-phase busbars and to secure them. The insulators can prevent arc discharge risks and ensure heat dissipation between the busbars.

[0009] Specifically, each circuit breaker is equipped with an output copper busbar or conductive terminal as a load connection port, which is located on the back of the cabinet. Each circuit breaker can be equipped with a connection solution such as an output copper busbar or conductive terminal according to the size of the on-site cables.

[0010] Specifically, a vertical busbar frame is provided at the connection between the vertical copper busbar and the transfer copper busbar, and the vertical busbar frame fixes the copper busbar to ensure the electrical distance between the copper buses.

[0011] Specifically, fixing frames are provided on both sides of the cabinet, and the circuit breaker group is connected to the fixing frames of the cabinet through fixing screws on the mounting plate.

[0012] Specifically, the circuit breaker group is assembled outside the cabinet and installed inside the cabinet, secured with screws. The fixing legs of the three-phase busbar are then connected to the vertical busbar or adapter busbar. The circuit breaker group can be considered a modular component and assembled outside the cabinet in advance. The installation structure is simple and convenient, facilitating maintenance, inspection, and replacement.

[0013] Specifically, a cabinet zero row and a grounding row are provided at the bottom of the cabinet, and the cabinet zero row is provided with a plurality of holes of different sizes.

[0014] Specifically, the busbar is bolted to the three-way connection above the circuit breaker. This reliable connection ensures stable current transmission and the stability and reliability of the equipment during long-term operation.

[0015] The beneficial effects of the present invention are: 1. Improve electrical conductivity: The all-copper busbar structure has excellent electrical conductivity, which can significantly reduce the resistance loss in electrical connections and improve the efficiency of electrical equipment; 2. Enhance heat dissipation performance: By optimizing the heat dissipation design, the heat dissipation performance of electrical equipment is improved to ensure the stability and reliability of the equipment during long-term operation; 3. Simplified installation process: The upper copper busbar of the modular circuit breaker is assembled in advance, which simplifies the installation process and reduces installation cost and time; 4. Improve the reliability and safety of the overall structure. Through reasonable layout and safety protection measures, the reliability and safety of the overall structure are improved and the risk of electrical failure is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a structural diagram of the first circuit breaker group.

[0018] Figure 3 FIG. 4 is a top view of the first circuit breaker group. FIG.

[0019] Figure 4 It is a structural diagram of the second circuit breaker group and the load connection port.

[0020] Figure 5 This is the back structural diagram of the all-copper busbar circuit breaker cabinet of the present invention.

[0021] Figure 6 for Figure 5 A partial enlarged view of the overlap of the vertical copper busbar.

[0022] Figure 7 The diagram below shows the connection diagram of the copper busbar.

[0023] In the figure, cabinet 1, screen top busbar 2, first circuit breaker group 3, second circuit breaker group 4, screen top transfer copper bar 5, vertical copper bar 6, first mounting plate 7, first circuit breaker 8, first insulator 9, first A-phase copper bar 10, first B-phase copper bar 11, first C-phase copper bar 12, second mounting plate 13, large circuit breaker 14, small circuit breaker 15, second insulator 16, second A-phase copper bar 17, second B-phase copper bar 18, second C-phase copper bar 19, A-phase copper bar interface 20, B-phase copper bar interface 21, C-phase copper bar interface 22, output copper bar 23, conductive terminal 24, cabinet neutral bar 25, grounding bar 26, vertical busbar frame 27. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] Embodiment 1: An all-copper busbar circuit breaker group cabinet includes a cabinet body, with a screen top busbar provided above the cabinet body for AC incoming lines to pass through the top of the cabinet screen; a plurality of circuit breaker groups arranged in rows are provided in the cabinet body, and different circuit breaker groups are connected by vertical copper busbars; the screen top busbar is connected to the topmost circuit breaker group in the cabinet body by a transfer copper busbar; and the vertical copper busbar is connected to the transfer copper busbar.

[0026] The circuit breaker group includes a mounting plate installed horizontally inside the cabinet, with several circuit breakers installed on the mounting plate; the three-way connection interface above the circuit breaker is connected together through a busbar; the busbar includes the A-phase copper bar, the B-phase copper bar and the C-phase copper bar; the busbar of the circuit breaker group at the top of the cabinet is connected to the transfer copper bar, and the busbars of other circuit breaker groups are connected to the vertical copper bar.

[0027] The connection between the busbar and the transfer busbar or vertical busbar is equipped with a fixed foot with a curved structure. The fixed foot of the phase A busbar is bent inward, the fixed foot of the phase B busbar is not bent, and the fixed foot of the phase C busbar is bent outward. The fixed feet of the three-phase busbar are separated by a safe electrical distance. The tail of each phase of the three-phase busbar is also bent and turned, and the vertical busbars are overlapped in layers and staggered.

[0028] Insulators are installed at intervals on the busbars to ensure the electrical clearance between the three-phase busbars and to secure them. The insulators prevent arcing risks and ensure heat dissipation between the busbars.

[0029] Each circuit breaker is equipped with an output copper busbar or conductive terminal as a load connection port, which is located on the back of the cabinet. Each circuit breaker can be equipped with a connection solution such as output copper busbar or conductive terminal according to the size of the on-site cables.

[0030] A vertical busbar frame is provided at the connection between the vertical copper busbar and the transfer copper busbar. The vertical busbar frame fixes the copper busbar to ensure the electrical distance between the copper buses.

[0031] Mounting brackets are located on both sides of the cabinet, and the circuit breaker assembly is connected to the cabinet's mounting brackets using screws on the mounting plate. The circuit breaker assembly is assembled outside the cabinet and then secured with screws after installation. The fixing legs of the three-phase busbars are then connected to the vertical busbars or adapter busbars. The circuit breaker assembly can be considered a modular component and assembled outside the cabinet in advance. The simple and convenient installation structure facilitates maintenance, inspection, and replacement.

[0032] The cabinet zero row and grounding row are provided at the bottom of the cabinet, and the cabinet zero row is provided with several holes of different sizes.

[0033] The busbar is bolted to the three-way connection on the top of the circuit breaker. This reliable connection ensures stable current transmission and the stability and reliability of the equipment during long-term operation.

[0034] In this embodiment, a copper busbar of specific specifications is designed. Its cross-sectional shape, size, and current carrying capacity are precisely calculated according to the requirements of the electrical system. A turning busbar is designed for each of the three phases at the top of the circuit breaker. The fixing legs of the copper busbar are staggered in layers by bending and turning. The busbar ensures uniform current distribution and reduces copper busbar usage. The tail of the copper busbar is fixed to the vertical copper busbar by bending and turning, and is staggered in layers and fixed to the vertical copper busbar. It is then connected to the busbar via the top-of-screen transfer copper busbar.

[0035] In this embodiment, the overall cabinet layout is rationally planned based on the cabinet's structure and dimensions, ensuring that the spacing between the copper bars meets electrical safety requirements. Insulators are installed between each phase. The circuit breaker assembly can be preassembled outside the cabinet as a modular component before the entire cabinet is assembled, facilitating installation and maintenance. Reliable bolts are used to connect the copper bar to the top of the circuit breaker, ensuring a secure and stable electrical connection.

[0036] In the heat dissipation design of this embodiment, the design of the copper busbar fully considers the heat dissipation requirements. The electrical clearance is increased by bending and turning the copper busbar, the heat dissipation area is increased, the heat dissipation path is optimized, and the heat dissipation performance of the electrical equipment is improved. The copper busbar is connected by bolts, and the connection method is reliable, ensuring stable current transmission and ensuring the stability and reliability of the equipment under long-term operation.

[0037] In terms of safety protection, this embodiment provides appropriate insulation measures between the copper bars and grounding protection within the cabinet to prevent the occurrence of safety hazards such as electrical short circuits and arc discharges.

[0038] The specific implementation is shown in the figure. Figure 1 In the figure, the cabinet 1 is a State Grid standard cabinet, which can accommodate multiple layers of circuit breaker groups from top to bottom. The screen top busbar 2 is a busbar that runs through the top of the AC incoming line cabinet. The first circuit breaker group 3 is installed in the cabinet 1 by multiple circuit breakers with the same shell, mounting plates and busbars. The upper end of each circuit breaker is connected to the busbar by bolts to form a circuit breaker group. The second circuit breaker group 4 is installed in the cabinet 1 by several circuit breakers with shells of different sizes, mounting plates and busbars. The upper end of each circuit breaker is connected to the busbar by bolts to form a circuit breaker group. The transfer busbar 5 on the screen top is a busbar converted from the busbar. The vertical busbar 6 is a vertical lapped busbar from top to bottom. The vertical busbar 6 connects the screen top transfer busbar 5 with the circuit breaker groups 3 and 4 of each section.

[0039] like Figure 2As shown, the detailed assembly structure of the copper busbar of the first circuit breaker group 3 can be regarded as a modular component assembled outside the cabinet in advance, and then the circuit breaker group 3 is assembled into a cabinet as a whole. The installation structure of the circuit breaker group 3 is simple and convenient, and is assembled from a mounting plate 7, a circuit breaker 8, an insulator 9, an A-phase copper busbar 10, a B-phase copper busbar 11, and a C-phase copper busbar 12. The copper busbars 10, 11, and 12 are turning busbars. Each phase is provided with a fixed foot connected to the upper port of the circuit breaker. The fixed foot of the copper busbar 10 turns toward the inside of the cabinet, the fixed foot of the copper busbar 11 does not turn, and the fixed foot of the copper busbar 12 turns toward the outside of the cabinet, so that the phases can be staggered in layers. The insulators 9 are fixed between the phases to ensure the electrical gap and to pull the copper busbars together, making the structure more reliable. The tail of each phase of the copper busbars 10, 11, and 12 is also bent and turned, and is staggered in layers and overlapped with the vertical copper busbar 6. Each phase has a busbar. The busbar has good conductivity and does not require cable connection.

[0040] like Figure 3 As shown, the detailed phase distances of the copper bars 10, 11, and 12 are much larger than the safe electrical distance by turning the copper bars. In addition, insulators 9 are provided between the copper bars, which can completely prevent the risk of arc discharge and ensure the heat dissipation requirements between the copper bars.

[0041] like Figure 4 As shown, the detailed assembly structure of the copper busbar of the second circuit breaker group 4 in the cabinet is Figure 2 The copper busbars are arranged in the same layered manner and can be regarded as a module component assembled outside the cabinet in advance, and then the circuit breaker group 4 is assembled into a cabinet as a whole. The installation structure of the circuit breaker group 4 is simple and convenient, and is assembled from a mounting plate 13, a large circuit breaker 14, several small circuit breakers 15, an insulator 16, an A-phase copper busbar 17, a B-phase copper busbar 18, and a C-phase copper busbar 19. Figure 2 The difference is that the models and specifications of the circuit breaker shells are different. This is also an arrangement commonly used in State Grid substations. When this arrangement scheme appears, the A-phase copper busbar interface 20, the B-phase copper busbar interface 21, and the C-phase copper busbar interface 22 on the upper mouth of the circuit breaker 15 can be respectively connected to the A-phase copper busbar 17, the B-phase copper busbar 18, and the C-phase copper busbar 19 by turning.

[0042] like Figure 5 As shown, output busbar 23 serves as the load connection for circuit breaker 14, and conductive terminal 24 serves as the load connection for circuit breaker 15. Load connection terminals for other switches are not shown. Connection options such as output busbar 23 or conductive terminal 24 can be selected based on the size of on-site cables. The cabinet grounding bar 25 has several holes of varying sizes for flexible wiring. Grounding bar 26 protects personnel and ensures normal equipment operation.

[0043] like Figure 6As shown, it is a partial enlarged view of the vertical copper busbar joint. The upper ends of the screen top transfer copper buses 5-A, 5-B, and 5-C are respectively connected to the A, B, and C phases of the busbar 2, and the lower ends are respectively connected to the vertical copper buses 6-A, 6-B, and 6-C. When the circuit breaker is grouped into three cabinets, the copper buses 10, 11, and 12 are respectively connected to the vertical copper buses 6-A, 6-B, and 6-C. All of them are connected by copper busbar turning. The vertical copper busbar 6 is fixed to the vertical busbar frame 27, which can not only fix the copper busbar, but also ensure the electrical distance between the vertical copper buses 6, which can completely prevent the risk of arc discharge and meet the heat dissipation requirements between the copper buses.

[0044] like Figure 7 As shown in the figure, the connection diagram of the full copper busbar at the top of the circuit breaker is as follows: power is taken from the busbar 2, passed through the top of the screen to the copper busbar 5, and then to the vertical copper busbar 6. The A-phase copper busbar 10, B-phase copper busbar 11, and C-phase copper busbar 12 in the circuit breaker group 3 and the A-phase copper busbar interface 20, B-phase copper busbar interface 21, and C-phase copper busbar interface 22 in the circuit breaker group 4 are respectively connected to the vertical copper busbar 6, thereby achieving complete conduction of the circuit.

[0045] Embodiment 2: An all-copper busbar circuit breaker group cabinet includes a cabinet body, with a screen top busbar provided above the cabinet body for AC incoming lines to pass through the top of the cabinet screen; a plurality of circuit breaker groups arranged in rows are provided in the cabinet body, and different circuit breaker groups are connected by vertical copper busbars; the screen top busbar is connected to the topmost circuit breaker group in the cabinet body through a transfer copper busbar; and the vertical copper busbar is connected to the transfer copper busbar.

[0046] The circuit breaker group includes a mounting plate installed horizontally inside the cabinet, with several circuit breakers installed on the mounting plate; the three-way connection interface above the circuit breaker is connected together through a busbar; the busbar includes the A-phase copper bar, the B-phase copper bar and the C-phase copper bar; the busbar of the circuit breaker group at the top of the cabinet is connected to the transfer copper bar, and the busbars of other circuit breaker groups are connected to the vertical copper bar.

[0047] The connection between the busbar and the transfer busbar or vertical busbar is equipped with a fixed foot with a curved structure. The fixed foot of the phase A busbar is bent inward, the fixed foot of the phase B busbar is not bent, and the fixed foot of the phase C busbar is bent outward. The fixed feet of the three-phase busbar are separated by a safe electrical distance. The tail of each phase of the three-phase busbar is also bent and turned, and the vertical busbars are overlapped in layers and staggered.

[0048] Insulators are installed at intervals on the busbars to ensure the electrical clearance between the three-phase busbars and to secure them. The insulators prevent arcing risks and ensure heat dissipation between the busbars.

[0049] Each circuit breaker is equipped with an output copper busbar or conductive terminal as a load connection port, which is located on the back of the cabinet. Each circuit breaker can be equipped with a connection solution such as output copper busbar or conductive terminal according to the size of the on-site cables.

[0050] A vertical busbar frame is provided at the connection between the vertical copper busbar and the transfer copper busbar. The vertical busbar frame fixes the copper busbar to ensure the electrical distance between the copper buses.

[0051] Mounting brackets are located on both sides of the cabinet, and the circuit breaker assembly is connected to the cabinet's mounting brackets using screws on the mounting plate. The circuit breaker assembly is assembled outside the cabinet and then secured with screws after installation. The fixing legs of the three-phase busbars are then connected to the vertical busbars or adapter busbars. The circuit breaker assembly can be considered a modular component and assembled outside the cabinet in advance. The simple and convenient installation structure facilitates maintenance, inspection, and replacement.

[0052] The cabinet zero row and grounding row are provided at the bottom of the cabinet, and the cabinet zero row is provided with several holes of different sizes.

[0053] The busbar is bolted to the three-way connection on the top of the circuit breaker. This reliable connection ensures stable current transmission and the stability and reliability of the equipment during long-term operation.

[0054] In this embodiment, a copper busbar of specific specifications is designed. Its cross-sectional shape, size, and current carrying capacity are precisely calculated according to the requirements of the electrical system. A turning busbar is designed for each of the three phases at the top of the circuit breaker. The fixing legs of the copper busbar are staggered in layers by bending and turning. The busbar ensures uniform current distribution and reduces copper busbar usage. The tail of the copper busbar is fixed to the vertical copper busbar by bending and turning, and is staggered in layers and fixed to the vertical copper busbar. It is then connected to the busbar via the top-of-screen transfer copper busbar.

[0055] In this embodiment, the overall cabinet layout is rationally planned based on the cabinet's structure and dimensions, ensuring that the spacing between the copper bars meets electrical safety requirements. Insulators are installed between each phase. The circuit breaker assembly can be preassembled outside the cabinet as a modular component before the entire cabinet is assembled, facilitating installation and maintenance. Reliable bolts are used to connect the copper bar to the top of the circuit breaker, ensuring a secure and stable electrical connection.

[0056] In the heat dissipation design of this embodiment, the design of the copper busbar fully considers the heat dissipation requirements. The electrical clearance is increased by bending and turning the copper busbar, the heat dissipation area is increased, the heat dissipation path is optimized, and the heat dissipation performance of the electrical equipment is improved. The copper busbar is connected by bolts, and the connection method is reliable, ensuring stable current transmission and ensuring the stability and reliability of the equipment under long-term operation.

[0057] In terms of safety protection, this embodiment provides appropriate insulation measures between the copper bars and grounding protection within the cabinet to prevent the occurrence of safety hazards such as electrical short circuits and arc discharges.

[0058] The specific implementation is shown in the figure. Figure 1In the figure, cabinet 1 is a State Grid standard cabinet, which can accommodate multiple layers of circuit breaker groups from top to bottom. The screen top busbar 2 is a busbar that runs through the top of the AC incoming line cabinet. The circuit breaker group 3 is installed in the cabinet 1 by multiple circuit breakers with the same shell, mounting plates and busbars. The upper end of each circuit breaker is connected to the busbar by bolts to form a circuit breaker group. The circuit breaker group 4 is installed in the cabinet 1 by several circuit breakers with shells of different sizes, mounting plates and busbars. The upper end of each circuit breaker is connected to the busbar by bolts to form a circuit breaker group. The transfer busbar 5 on the screen top is a busbar converted from the busbar. The vertical busbar 6 is a vertical lapped busbar from top to bottom. The vertical busbar 6 connects the screen top transfer busbar 5 with the circuit breaker groups 3 and 4 of each section.

[0059] like Figure 2 As shown, the detailed assembly structure of the copper busbars of the circuit breaker group 3 can be regarded as a modular component that is assembled outside the cabinet in advance, and then the circuit breaker group 3 is assembled into a cabinet as a whole. The installation structure of the circuit breaker group 3 is simple and convenient, and is assembled from a mounting plate 7, a circuit breaker 8, an insulator 9, a phase A copper busbar 10, a phase B copper busbar 11, and a phase C copper busbar 12. The copper busbars 10, 11, and 12 are turning busbars. Each phase is provided with a fixed foot connected to the upper port of the circuit breaker. The fixed foot of the copper busbar 10 turns toward the inside of the cabinet, the fixed foot of the copper busbar 11 does not turn, and the fixed foot of the copper busbar 12 turns toward the outside of the cabinet, so that the phases can be staggered in layers. The insulators 9 are fixed between the phases to ensure the electrical gap and to pull the copper busbars together, making the structure more reliable. The tail of each phase of the copper busbars 10, 11, and 12 is also bent and turned, and is staggered in layers and overlapped with the vertical copper busbar 6. Each phase has a busbar. The copper busbars 10, 11, and 12 are made of red copper, have good electrical conductivity, and do not require cable connection.

[0060] like Figure 3 As shown, the detailed phase distances of the copper bars 10, 11, and 12 are much larger than the safe electrical distance by turning the copper bars. In addition, insulators 9 are provided between the copper bars, which can completely prevent the risk of arc discharge and ensure the heat dissipation requirements between the copper bars.

[0061] like Figure 4 As shown, the copper busbar of the circuit breaker group 4 is assembled in detail. Figure 2 The copper busbars are arranged in the same layered manner and can be regarded as a module component assembled outside the cabinet in advance, and then the circuit breaker group 4 is assembled into a cabinet as a whole. The installation structure of the circuit breaker group 4 is simple and convenient, and is assembled from a mounting plate 13, a circuit breaker 14, a plurality of circuit breakers 15, an insulator 16, an A-phase copper busbar 17, a B-phase copper busbar 18, and a C-phase copper busbar 19. Figure 2The difference is that the models and specifications of the circuit breaker shells are different. This is also an arrangement commonly used in State Grid substations. When this arrangement scheme appears, the A-phase copper busbar interface 20, the B-phase copper busbar interface 21, and the C-phase copper busbar interface 22 on the upper mouth of the circuit breaker 15 can be respectively connected to the A-phase copper busbar 17, the B-phase copper busbar 18, and the C-phase copper busbar 19 by turning.

[0062] like Figure 5 As shown, output busbar 23 serves as the load connection for circuit breaker 14, and conductive terminal 24 serves as the load connection for circuit breaker 15. Load connection terminals for other switches are not shown. Connection options such as output busbar 23 or conductive terminal 24 can be selected based on the size of on-site cables. The cabinet grounding bar 25 has several holes of varying sizes for flexible wiring. Grounding bar 26 protects personnel and ensures normal equipment operation.

[0063] like Figure 6 As shown, it is a partial enlarged view of the vertical copper busbar joint. The upper ends of the screen top transfer copper buses 5-A, 5-B, and 5-C are respectively connected to the A, B, and C phases of the busbar 2, and the lower ends are respectively connected to the vertical copper buses 6-A, 6-B, and 6-C. When the circuit breaker is grouped into three cabinets, the copper buses 10, 11, and 12 are respectively connected to the vertical copper buses 6-A, 6-B, and 6-C. All of them are connected by copper busbar turning. The vertical copper busbar 6 is fixed to the vertical busbar frame 27, which can not only fix the copper busbar, but also ensure the electrical distance between the vertical copper buses 6, which can completely prevent the risk of arc discharge and meet the heat dissipation requirements between the copper buses.

[0064] like Figure 7 As shown in the figure, the connection diagram of the full copper busbar at the top of the circuit breaker is as follows: power is taken from the busbar 2, passed through the top of the screen to the copper busbar 5, and then to the vertical copper busbar 6. The A-phase copper busbar 10, B-phase copper busbar 11, and C-phase copper busbar 12 in the circuit breaker group 3 and the A-phase copper busbar interface 20, B-phase copper busbar interface 21, and C-phase copper busbar interface 22 in the circuit breaker group 4 are respectively connected to the vertical copper busbar 6, thereby achieving complete conduction of the circuit.

[0065] In this embodiment, the copper busbars are specially surface-treated, and no cables are connected to the top of the circuit breaker to improve their conductivity and corrosion resistance. All copper busbars are made of red copper, which has high electrical and thermal conductivity. Using red copper ensures the overall conductivity of the busbars and ensures heat dissipation between the busbars.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A full copper busbar circuit breaker cabinet, characterized in that: It includes a cabinet body, on top of which a busbar is provided for the AC incoming line to pass through the top of the cabinet body; inside the cabinet there are several circuit breaker groups arranged in rows, and different circuit breaker groups are connected by vertical copper bars; the top busbar is connected to the top circuit breaker group in the cabinet through a transfer copper bar; the vertical copper bar is connected to the transfer copper bar.

2. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that: The circuit breaker group includes a mounting plate installed horizontally inside the cabinet, with several circuit breakers installed on the mounting plate; the three-way connection interface above the circuit breaker is connected together through a busbar; the busbar includes the A-phase copper bar, the B-phase copper bar and the C-phase copper bar; the busbar of the circuit breaker group at the top of the cabinet is connected to the transfer copper bar, and the busbars of other circuit breaker groups are connected to the vertical copper bar.

3. The all-copper busbar circuit breaker cabinet according to claim 2, characterized in that: The connection between the busbar and the transfer busbar or vertical busbar is equipped with a fixed foot with a bent structure. The fixed foot of the A-phase copper busbar turns toward the inside of the cabinet, the fixed foot of the B-phase copper busbar does not turn, and the fixed foot of the C-phase copper busbar turns toward the outside of the cabinet. The distance between the fixed feet of the three-phase busbar exceeds the safe electrical distance.

4. The all-copper busbar circuit breaker cabinet according to claim 2 or 3, characterized in that: Insulators are provided at intervals on the busbars to ensure the electrical clearance between the three-phase busbars and to fix the three-phase busbars.

5. The all-copper busbar circuit breaker cabinet according to claim 2, characterized in that: Each circuit breaker is equipped with an output copper busbar or conductive terminal as a load connection port, and the load connection port is set on the back of the cabinet.

6. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that: A vertical busbar frame is provided at the connection between the vertical copper busbar and the transfer copper busbar. The vertical busbar frame fixes the copper busbar to ensure the electrical distance between the copper buses.

7. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that: There are fixing brackets on both sides of the cabinet, and the circuit breaker group is connected to the fixing brackets of the cabinet through fixing screws on the mounting plate.

8. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that: The circuit breaker group is assembled outside the cabinet and fixed with screws after being installed into the cabinet. Then the fixing feet of the three-phase busbar are connected to the vertical busbar or the transfer busbar.

9. The all-copper busbar circuit breaker cabinet according to claim 1, characterized in that: The cabinet zero row and grounding row are provided at the bottom of the cabinet, and the cabinet zero row is provided with several holes of different sizes.

10. The all-copper busbar circuit breaker cabinet according to claim 2, characterized in that: The busbar is connected to the three-way connection interface above the circuit breaker by bolts.

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