Low voltage distribution box

Abstract

This application relates to a low-voltage distribution box, comprising a box body and a power distribution mechanism housed inside the box body, including a busbar assembly, a circuit breaker, and a grid connection interface assembly. The output terminal of the grid connection interface assembly is connected to the input terminal of the busbar assembly, and the input terminal of the circuit breaker is detachably connected to the output terminal of the busbar assembly. The input terminal of the grid connection interface assembly is connected to both a main power supply and an emergency power supply. When the main power supply fails, the grid connection interface assembly supplies power to the power distribution mechanism via the emergency power supply. This invention integrates other electrical equipment, including busbar assemblies, circuit breakers, and grid connection interface assemblies, within the box body. Therefore, this low-voltage distribution box has high space utilization, and the dual power supply switching ensures continuous power supply, meeting the emergency power supply needs of various scenarios.

Description

Technical Field

[0001] This application relates to the field of low-voltage power grid technology, and in particular to a low-voltage distribution box. Background Technology

[0002] Low-voltage distribution boxes are complete sets of power distribution devices used in AC circuits below 1000V to realize power distribution, control, protection, and metering. Common voltages are three-phase 380V and single-phase 220V. Internally, they are equipped with circuit breakers, residual current devices (RCDs), contactors, meters, and other components. They are categorized into power, lighting, metering, and control types to ensure safe and stable electricity use. The working principle of a low-voltage distribution box is as follows: after the main power supply enters the box, it is distributed to each branch circuit through switches and protective components. The circuit breaker automatically disconnects the circuit in case of overload or short circuit, and the residual current device detects leakage and trips quickly, thus realizing power distribution, control, and protection to ensure electrical safety.

[0003] The existing distribution boxes have multiple sub-boxes installed separately, which takes up a lot of space and cannot meet the deployment requirements in narrow spaces. In addition, their applicability and emergency response capabilities are insufficient. Summary of the Invention

[0004] This application provides a low-voltage distribution box that solves the problems of insufficient deployment in narrow spaces, as well as inadequate applicability and emergency response capabilities.

[0005] According to one aspect of this application, a low-voltage distribution box is provided, comprising:

[0006] Box;

[0007] The power distribution mechanism, located inside the enclosure, includes a busbar assembly, a circuit breaker, and a grid connection interface assembly. The output circuit of the grid connection interface assembly is connected to the input terminal of the busbar assembly, and the input circuit of the circuit breaker is detachably connected to the output terminal of the busbar assembly. The input circuit of the grid connection interface assembly is connected to a main power supply and an emergency power supply. When the main power supply fails, the grid connection interface assembly supplies power to the power distribution mechanism through the emergency power supply.

[0008] In one embodiment, the busbar assembly includes a first phase bus, a second phase bus, and a third phase bus; the first phase bus, the second phase bus, and the third phase bus are spaced apart along a first direction; the grid connection interface assembly includes a first connecting bus, a second connecting bus, and a third connecting bus; the output terminal of the first connecting bus is circuitically connected to the input terminal of the first phase bus; the output terminal of the second connecting bus is circuitically connected to the input terminal of the second phase bus; and the output terminal of the third connecting bus is circuitically connected to the input terminal of the third phase bus.

[0009] In one embodiment, the first row includes a plurality of first terminals for connecting to the L1 phase of the three-phase emergency power supply; the second row includes a plurality of second terminals for connecting to the L2 phase of the three-phase emergency power supply; and the third row includes a plurality of third terminals for connecting to the L3 phase of the three-phase emergency power supply.

[0010] In one embodiment, the circuit breaker includes a first clamping member, a second clamping member, and a third clamping member; the first clamping member is correspondingly disposed to the first phase bus, and the input terminal of the first clamping member is circuitally connected to the output terminal of the first phase bus; the second clamping member is correspondingly disposed to the second phase bus, and the input terminal of the second clamping member is circuitally connected to the output terminal of the second phase bus; the third clamping member is correspondingly disposed to the third phase bus, and the input terminal of the third clamping member is circuitally connected to the output terminal of the third phase bus.

[0011] In one embodiment, the power distribution mechanism further includes a mounting base plate; the mounting base plate has a slot; the circuit breaker includes a positioning seat, the positioning seat includes a plug-in portion; the plug-in portion is detachably disposed in the slot, and the circuit breaker body is detachably disposed on the mounting base plate via the positioning seat.

[0012] In one embodiment, the power distribution mechanism further includes an isolating switch; the isolating switch is disposed between the grid-connected interface component and the main power supply; the isolating switch is used to control the opening and closing states of the main power supply and the power distribution mechanism.

[0013] In one embodiment, the enclosure includes a first door panel, a second door panel, and a third door panel; the first door panel is rotatably mounted on the enclosure in a second direction, and an operator can open the first door panel to inspect the grid-connected interface component; the second door panel is rotatably mounted on the enclosure in a third direction, and an operator can open the second door panel to inspect the isolating switch; the third door panel is rotatably mounted on the enclosure in a third direction, and an operator can open the third door panel to inspect the busbar assembly and the circuit breaker.

[0014] In one embodiment, a first limiting part is provided on the side of the first door panel facing the second door panel, and a second limiting part is provided on the side of the second door panel facing the first door panel; the first limiting part is configured to limit the second limiting part, and when the second door panel needs to be opened, the first door panel rotates upward along the first direction to shield and protect the power distribution mechanism inside the enclosure; the enclosure also includes a rain cover; the rain cover is provided on the side of the enclosure away from the third direction to block rainwater.

[0015] In one embodiment, the low-voltage distribution box further includes a positioning element; the positioning element is detachably mounted on the box body, and the box body is detachably mounted on the distribution box frame via the positioning element;

[0016] The low-voltage distribution box also includes a heat dissipation component; the heat dissipation component includes a fan and a heat dissipation trough; the fan is located inside the box, the air inlet of the fan is located inside the box, and the air outlet of the fan is located outside the box; the heat dissipation trough is formed on the outer wall of the box for communicating with the outside air;

[0017] The low-voltage distribution box also includes a protection component; the protection component includes a first shield and a second shield, both of which are slidably disposed inside the box; the first shield is disposed on the side of the isolating switch facing the first direction, and is used to shield the wiring point between the isolating switch and the main power supply to prevent accidental contact by the operator; the second shield is disposed on the side of the circuit breaker facing the first direction, and is used to shield the output terminal of the circuit breaker to prevent accidental contact by the operator.

[0018] In one embodiment, the low-voltage distribution box further includes a metering box; the metering box includes an electricity meter; the electricity meter is connected to the output circuit of the main power supply for measuring and displaying electricity consumption.

[0019] This application has the following beneficial effects:

[0020] In this invention, the power distribution mechanism is integrated inside the enclosure. When the main power supply is normal, the grid connection interface component connects the main power circuit, transmitting electrical energy to the busbar assembly. After the busbar assembly completes the power collection, it distributes the energy to each circuit breaker, which then supplies power to the external loads. When the main power supply fails or other abnormal situations occur, the emergency power supply supplies power to the busbar assembly and subsequent circuit breakers. The circuit breakers and busbar assembly are detachably connected, facilitating installation, replacement, and capacity expansion. The enclosure integrates busbar assembly, circuit breakers, grid connection interface component, and other electrical equipment, thus this low-voltage distribution box has high space utilization, and the dual power supply switching ensures continuous power supply, meeting the emergency power supply needs of multiple scenarios. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0022] Figure 2 This is a three-dimensional structural diagram of an embodiment of this application.

[0023] Figure 3 This is a cross-sectional view of the box body in one embodiment of this application.

[0024] Figure 4for Figure 3 Enlarged view of the structure at point A in the middle.

[0025] Figure 5 The three-dimensional structure of the power distribution mechanism in one embodiment of this application Figure 1 .

[0026] Figure 6 The three-dimensional structure of the power distribution mechanism in one embodiment of this application Figure 2 .

[0027] Figure 7 for Figure 6 Enlarged view of the structure at point B in the middle.

[0028] Figure 8 This is a three-dimensional structural diagram of the mounting base plate in one embodiment of this application.

[0029] Figure 9 This is a three-dimensional structural diagram of a circuit breaker in one embodiment of this application.

[0030] Explanation of reference numerals in the attached figures:

[0031] 100. Box body;

[0032] 110. First door panel; 111. First limiting part;

[0033] 120. Second door panel; 121. Second limiting part;

[0034] 130. The third door panel;

[0035] 140. Positioning components;

[0036] 150. Heat dissipation components;

[0037] 151. Fan; 152. Heat dissipation duct;

[0038] 160. Protection components;

[0039] 161. First shielding component; 162. Second shielding component;

[0040] 200. Power distribution system;

[0041] 210. Busbar assembly;

[0042] 211. First phase arrangement; 212. Second phase arrangement; 213. Third phase arrangement;

[0043] 220. Circuit breaker;

[0044] 221. First clamping component; 222. Second clamping component; 223. Third clamping component;

[0045] 224. Positioning seat; 2241. Plug-in part;

[0046] 230. Grid connection interface component;

[0047] 231, First row; 2311, First terminal;

[0048] 232, Second row; 2321, Second terminal block;

[0049] 233, Third row; 2331, Third terminal;

[0050] 240. Isolating switch;

[0051] 250. Mounting base plate; 251. Slot;

[0052] 300. Measuring box;

[0053] 310. Electricity meter. Detailed Implementation

[0054] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0055] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and 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 application.

[0056] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0057] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0058] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0059] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0060] See appendix Figure 1 -Appendix Figure 2 , attached Figure 1 -Appendix Figure 2 A schematic diagram of the overall structure of a low-voltage distribution box according to an embodiment of this application is shown, including:

[0061] Box 100;

[0062] The power distribution mechanism 200 is located inside the enclosure 100 and includes a busbar assembly 210, a circuit breaker 220, and a grid connection interface assembly 230. The output circuit of the grid connection interface assembly 230 is connected to the input circuit of the busbar assembly 210, and the input circuit of the circuit breaker 220 is detachably connected to the output circuit of the busbar assembly 210. The input circuit of the grid connection interface assembly 230 is connected to the main power supply and the emergency power supply. When the main power supply fails, the grid connection interface assembly 230 supplies power to the power distribution mechanism 200 through the emergency power supply.

[0063] The application includes a enclosure 100 and a power distribution mechanism 200, which is integrated inside the enclosure 100. The power distribution mechanism 200 mainly includes a busbar assembly 210, a circuit breaker 220, and a grid connection interface assembly 230. The output terminal of the grid connection interface assembly 230 is connected to the input terminal of the busbar assembly 210, and the input terminal of the circuit breaker 220 is detachably connected to the output terminal of the busbar assembly 210. The input terminals of the grid connection interface assembly 230 are connected to the main power supply and the emergency power supply respectively, forming an integrated structure with dual power input.

[0064] When the main power supply is in normal operation, the grid connection interface component 230 connects the main power supply circuit and transmits electrical energy to the busbar component 210. After the busbar component 210 completes the power collection, it distributes the power to each circuit breaker 220, and then the circuit breaker 220 supplies power to the external load.

[0065] When the main power supply fails or other abnormal situations occur, the grid connection interface component 230 automatically switches to the emergency power circuit, from which the emergency power supply supplies power to the busbar component 210 and the subsequent circuit breaker 220, ensuring continuous power supply to the load. The circuit breaker 220 and the busbar component 210 are detachably connected, facilitating quick installation, replacement, and capacity expansion.

[0066] See appendix Figure 5 -Appendix Figure 6 The busbar assembly 210 includes a first phase busbar 211, a second phase busbar 212, and a third phase busbar 213; the first phase busbar 211, the second phase busbar 212, and the third phase busbar 213 are spaced apart along a first direction; the grid connection interface assembly 230 includes a first connecting busbar 231, a second connecting busbar 232, and a third connecting busbar 233; the first connecting busbar 231 is correspondingly arranged to the first phase busbar 211, and the output terminal of the first connecting busbar 231 is connected to the input terminal of the first phase busbar 211; the second connecting busbar 232 is correspondingly arranged to the second phase busbar 212, and the output terminal of the second connecting busbar 232 is connected to the input terminal of the second phase busbar 212; the third connecting busbar 233 is correspondingly arranged to the third phase busbar 213, and the output terminal of the third connecting busbar 233 is connected to the input terminal of the third phase busbar 213.

[0067] In some embodiments, the busbar assembly 210 is composed of a first phase busbar 211, a second phase busbar 212, and a third phase busbar 213. The three phase busbars are spaced apart from each other and arranged insulatedly along a first direction, respectively corresponding to the three-phase conductive units of a three-phase circuit.

[0068] The grid-connected interface component 230 has a first row 231, a second row 232, and a third row 233, with each row corresponding to one of the three phases. The output of the first row 231 is connected to the input of the first phase 211, the output of the second row 232 is connected to the input of the second phase 212, and the output of the third row 233 is connected to the input of the third phase 213, forming a direct-connection structure for the three-phase power supply.

[0069] The grid-connected interface component 230 transmits the three-phase electrical energy input from the main power supply or emergency power supply to the first phase bus 211, the second phase bus 212, and the third phase bus 213 respectively through the first busbar 231, the second busbar 232, and the third busbar 233. The three-phase current is transmitted independently along its respective busbar and phase bus, ensuring the balance of the three-phase power supply and providing a reliable three-phase power supply for the subsequent circuit breaker 220.

[0070] See appendix Figure 5 -Appendix Figure 6 The first row 231 includes multiple first terminals 2311, which are used to connect to the L1 phase of the three-phase emergency power supply; the second row 232 includes multiple second terminals 2321, which are used to connect to the L2 phase of the three-phase emergency power supply; the third row 233 includes multiple third terminals 2331, which are used to connect to the L3 phase of the three-phase emergency power supply.

[0071] In some embodiments, the first row 231, the second row 232, and the third row 233 correspond to phases L1, L2, and L3 of the three-phase power supply, respectively. Each row is provided with multiple independent terminals. The first row 231 is provided with multiple first terminals 2311, the second row 232 is provided with multiple second terminals 2321, and the third row 233 is provided with multiple third terminals 2331. Each terminal serves as a dedicated access terminal for the corresponding phase.

[0072] During operation, the three-phase output of the emergency power supply connects phase L1 to the first connector 231 via the first terminal 2311, phase L2 to the second connector 232 via the second terminal 2321, and phase L3 to the third connector 233 via the third terminal 2331. The three phases are connected sequentially without interference. The multi-terminal structure provides multiple access points, allowing for multi-circuit access of the emergency power supply and enabling parallel access for multiple emergency vehicles.

[0073] See appendix Figure 6 -Appendix Figure 7 and attached Figure 9 The circuit breaker 220 includes a first clamping member 221, a second clamping member 222, and a third clamping member 223. The first clamping member 221 is correspondingly arranged with the first phase bus 211, and the input terminal of the first clamping member 221 is connected to the output terminal of the first phase bus 211. The second clamping member 222 is correspondingly arranged with the second phase bus 212, and the input terminal of the second clamping member 222 is connected to the output terminal of the second phase bus 212. The third clamping member 223 is correspondingly arranged with the third phase bus 213, and the input terminal of the third clamping member 223 is connected to the output terminal of the third phase bus 213.

[0074] In some embodiments, the circuit breaker 220 is equipped with three independent clamping structures: a first clamping member 221, a second clamping member 222, and a third clamping member 223. These three structures are arranged in a one-to-one correspondence with the first phase busbar 211, the second phase busbar 212, and the third phase busbar 213 of the busbar assembly 210, precisely matching the L1, L2, and L3 phases of the three-phase circuit.

[0075] Each clamping component serves as a connection carrier between the circuit breaker 220 and the corresponding phase busbar, employing a clampable structure design. The input end of the first clamping component 221 is securely connected to the output end of the first phase busbar 211, the input end of the second clamping component 222 is correspondingly connected to the output end of the second phase busbar 212, and the input end of the third clamping component 223 is connected to the output end of the third phase busbar 213. The whole structure forms a three-phase independent, one-to-one corresponding conductive connection structure. Moreover, the clamping design requires no additional fastening tools, enabling quick assembly and disassembly.

[0076] The busbar assembly 210 provides the three-phase power, i.e. the main power supply or emergency power supply, transmitted from the grid-connected interface assembly 230 through the first phase busbar 211, the second phase busbar 212, and the third phase busbar 213, respectively, and delivers it to the corresponding first clamping member 221, the second clamping member 222, and the third clamping member 223, and then guides it into the circuit breaker 220 through the clamping members.

[0077] In some embodiments, under normal power supply conditions, circuit breaker 220 remains conducting, and three-phase power is output to the subsequent load circuit through circuit breaker 220 to achieve stable distribution of three-phase power. When the circuit experiences abnormal conditions such as overload or short circuit, circuit breaker 220 simultaneously disconnects the conductive path between the three clamping members and the corresponding phase banks, achieving three-phase synchronous power outage protection and preventing abnormal current from damaging the power distribution equipment and load.

[0078] The first phase busbar 211, the second phase busbar 212, and the third phase busbar 213 are all L-shaped structures, which can save space in the second direction of the busbar assembly 210 and the grid connection interface assembly 230 in terms of layout.

[0079] See appendix Figure 8 -Appendix Figure 9 The power distribution mechanism 200 also includes a mounting base plate 250; a slot 251 is provided on the mounting base plate 250; the circuit breaker 220 includes a positioning seat 224, the positioning seat 224 includes a plug-in part 2241; the plug-in part 2241 is detachably disposed in the slot 251, and the main body of the circuit breaker 220 is detachably disposed on the mounting base plate 250 through the positioning seat 224.

[0080] In some embodiments, the power distribution mechanism 200 is provided with an additional mounting base plate 250 as the mounting support base for the circuit breaker 220. The mounting base plate 250 is provided with a slot 251 adapted to the positioning structure of the circuit breaker 220. The size of the slot 251 matches the positioning seat 224 of the circuit breaker 220 to ensure stability after insertion.

[0081] The circuit breaker 220 is equipped with a positioning seat 224, which is integrally formed with a plug-in part 2241. The plug-in part 2241 is a protruding structure that is adapted to the slot 251 and can be directly inserted into the slot 251. It adopts a detachable design, which can realize the detachable connection between the circuit breaker 220 and the mounting base plate 250 without additional fastening parts. The overall layout is neat and adaptable to the integrated installation requirements of the small space inside the enclosure 100.

[0082] In some embodiments, the mounting base plate 250 is fixed inside the housing 100 to provide a stable mounting reference for the circuit breaker 220, and the slot 251 therein is used to position and limit the circuit breaker 220.

[0083] When installing the circuit breaker 220, align the plug part 2241 on the positioning base 224 with the slot 251 on the mounting base 250 and insert it to quickly complete the positioning and initial fixation of the circuit breaker 220. With the connection of the first clamping member 221, the second clamping member 222, and the third clamping member 223 of the circuit breaker 220 to the corresponding phase row, the assembly of the circuit breaker 220 can be realized.

[0084] During disassembly, simply pull the circuit breaker 220 upwards to disengage the connector 2241 from the slot 251, and the circuit breaker 220 can be removed from the mounting base 250. This eliminates the need to disassemble the entire mounting base 250 or other power distribution components, improving the efficiency of circuit breaker 220 installation and removal, and enhancing maintenance convenience. Furthermore, the fit between the slot 251 and the connector 2241 ensures accurate positioning of the circuit breaker 220 after installation, preventing poor connection between the clamps and phase bars due to installation misalignment, and ensuring stable three-phase current transmission.

[0085] The newly added circuit breaker 220 only requires inserting the plug part 2241 into the slot 251 to complete the mechanical fixation, and then snapping each clamping part onto the phase busbar to achieve electrical connection. The entire power supply circuit does not need to be disconnected, realizing online uninterrupted installation.

[0086] The busbar assembly 210 adopts a layered structure design, divided into multiple independent layers. Each layer corresponds to a single phase in the three-phase circuit, and the layers are independent and orderly arranged without overlapping or interference. Simultaneously, each layer of the busbar is equipped with high-efficiency insulation protection components, forming an insulating protective structure to prevent contact between layers or between the busbar and other components. Furthermore, each layer of the busbar has sufficient reserved feeder interfaces to accommodate the wiring requirements of newly added circuits.

[0087] The layered structure separates the busbars of different phases, resulting in a neat phase sequence layout for the three-phase circuit. This minimizes the need for excessive additional space and effectively improves the utilization of the limited internal space of the enclosure 100. Insulation protection measures surround each layer of busbars, isolating electrical connections between different phase busbars, between busbars and the enclosure 100, and other components, preventing electrical faults caused by accidental contact, dust accumulation, or moisture. When power demand increases or additional feeder circuits are needed, new electrical components can be easily connected to the corresponding phase busbar layer without modifying the overall busbar structure, adapting to changes in power demand.

[0088] See appendix Figure 2 and attached Figure 5 The power distribution mechanism 200 also includes an isolating switch 240; the isolating switch 240 is disposed between the grid connection interface component 230 and the main power supply; the isolating switch 240 is used to control the opening and closing status of the main power supply and the power distribution mechanism 200.

[0089] In some embodiments, the power distribution mechanism 200 is provided with an isolating switch 240, which is arranged in series between the grid connection interface component 230 and the main power supply. As a dedicated isolation and switching component for the main power supply circuit, it has a clear disconnection point and can realize electrical isolation between the main power supply and the downstream power distribution circuit.

[0090] When the isolating switch 240 is closed, a conductive path is formed between the main power supply and the grid-connected interface component 230, allowing the main power supply to normally supply power to the grid-connected interface component 230 and subsequent power distribution equipment 200. When the isolating switch 240 is opened, the electrical connection between the main power supply and the grid-connected interface component 230 is severed, forming reliable electrical isolation. This facilitates power outage maintenance of components such as the grid-connected interface component 230, busbar assembly 210, and circuit breaker 220, while preventing accidental power restoration during maintenance and improving operational safety. When the main power supply is interrupted or the emergency power supply is activated, the isolating switch 240 can work with the grid-connected interface component 230 to complete power switching, ensuring that the main power supply circuit and the emergency power supply circuit do not interfere with each other, thus improving the safety and stability of the power distribution system.

[0091] See appendix Figure 1 The enclosure 100 includes a first door panel 110, a second door panel 120, and a third door panel 130. The first door panel 110 is rotatably mounted on the enclosure 100 in a second direction, and the operator can open the first door panel 110 to inspect the grid connection interface component 230. The second door panel 120 is rotatably mounted on the enclosure 100 in a third direction, and the operator can open the second door panel 120 to inspect the isolating switch 240. The third door panel 130 is rotatably mounted on the enclosure 100 in a third direction, and the operator can open the third door panel 130 to inspect the busbar assembly 210 and the circuit breaker 220.

[0092] In some embodiments, the enclosure 100 comprises a first door panel 110, a second door panel 120, and a third door panel 130, with each door panel corresponding to a different power distribution component and arranged in a separate area. The first door panel 110 is rotatably mounted on the enclosure 100 along a second direction, corresponding to the area of ​​the grid connection interface component 230. The second door panel 120 is rotatably mounted on the enclosure 100 along a third direction, corresponding to the area of ​​the isolating switch 240. The third door panel 130 is rotatably mounted on the enclosure 100 along a third direction, corresponding to the area of ​​the busbar assembly 210 and the circuit breaker 220. Each door panel rotates independently without interfering with the others.

[0093] The three door panels are designed to open independently in separate zones, each corresponding to a different functional component. Opening the first door panel 110 allows for independent inspection, wiring, and emergency power supply connection of the grid-connected interface component 230. Opening the third door panel 130 allows for inspection and maintenance of the busbar assembly 210 and the circuit breaker 220.

[0094] The first direction is the width of the enclosure 100, the second direction is the length of the enclosure 100, and the third direction is the height of the enclosure 100. In the layout of the internal electrical equipment of the enclosure 100, the grid connection interface component 230 and the busbar assembly 210 are arranged at intervals along the second direction, i.e., the length of the enclosure 100, while the closing isolating switch 240 and the grid connection interface component 230 are arranged at intervals along the third direction, i.e., the height of the enclosure 100. Furthermore, the busbar assembly 210 and the circuit breaker 220 are arranged at intervals along the third direction, i.e., the height of the enclosure 100. Therefore, the internal electrical equipment of the enclosure 100 is arranged compactly in this application, which can improve space utilization.

[0095] See appendix Figure 3 -Appendix Figure 4 The first door panel 110 is provided with a first limiting part 111 on the side facing the second door panel 120, and the second door panel 120 is provided with a second limiting part 121 on the side facing the first door panel 110. The first limiting part 111 is configured to limit the second limiting part 121. When the second door panel 120 needs to be opened, the first door panel 110 rotates upward along the second direction to shield and protect the power distribution mechanism 200 inside the enclosure 100. The enclosure 100 also includes a rain cover. The rain cover is provided on the side of the enclosure 100 away from the third direction to block rainwater.

[0096] In some embodiments, the first door panel 110 is provided with a first limiting part 111 on the side near the second door panel 120, and the second door panel 120 is provided with a second limiting part 121 on the side near the first door panel 110. The first limiting part 111 and the second limiting part 121 cooperate with each other to form a limiting structure, thereby realizing the interlocking constraint between the door panels.

[0097] A rain cover is installed on the top of the enclosure 100, facing away from the third party. The rain cover extends to cover the area above the enclosure, forming a rainproof structure.

[0098] In some embodiments, under normal conditions, the first limiting part 111 limits the second limiting part 121, preventing the second door panel 120 from being opened directly and avoiding accidental operation. When it is necessary to open the second door panel 120 to inspect the isolating switch 240, the first door panel 110 must first be rotated upward in the second direction. At this time, the first limiting part 111 releases its restriction on the second limiting part 121, and the first door panel 110 flips up to cover the power distribution mechanism 200 inside the enclosure 100, improving safety protection.

[0099] The rain cover continuously shields the top and edges of the enclosure 100, preventing rainwater from entering the interior of the enclosure 100 and protecting electrical components such as the grid connection interface component 230, isolating switch 240, busbar assembly 210, and circuit breaker 220, thereby improving the waterproof performance and operational reliability when used outdoors.

[0100] See appendix Figure 1 -Appendix Figure 3 The low-voltage distribution box also includes a positioning element 140; the positioning element 140 is detachably mounted on the box body 100, and the box body 100 is detachably mounted on the distribution box frame via the positioning element 140.

[0101] In some embodiments, a positioning component 140 is added to the low-voltage distribution box. The positioning component 140 is assembled on the box body 100 in a detachable connection manner. At the same time, the positioning component 140 forms an adaptive connection structure with the external distribution box frame, serving as an intermediate connection component between the box body 100 and the frame.

[0102] The positioning component 140 provides reliable installation positioning and fixed support for the enclosure 100. The enclosure 100 can be detachably installed on the distribution box frame with the help of the positioning component 140, which not only ensures the stable connection of the installation position, but also allows for quick assembly and disassembly of the enclosure 100.

[0103] See appendix Figure 1 -Appendix Figure 3 The low-voltage distribution box also includes a heat dissipation assembly 150; the heat dissipation assembly 150 includes a fan 151 and a heat dissipation trough 152; the fan 151 is located inside the enclosure 100, the air inlet of the fan 151 is located inside the enclosure 100, and the air outlet of the fan 151 is located outside the enclosure 100; the heat dissipation trough 152 is formed on the outer wall of the enclosure 100 for communicating with the outside air.

[0104] In some embodiments, when the fan 151 is running, it draws in hot air from inside the housing 100 through the air inlet and discharges it to the outside of the housing 100 through the air outlet, thereby forcibly removing internal heat. The heat dissipation trough 152 serves as a natural air intake or auxiliary heat dissipation channel, allowing external cool air to enter the housing 100 and, in conjunction with the fan 151, form forced convection heat dissipation, reducing the heat generated during operation, ensuring stable operation of the distribution box in a closed integrated environment, and preventing malfunctions caused by high temperatures.

[0105] See appendix Figure 1 -Appendix Figure 3 The low-voltage distribution box also includes a protection component 160; the protection component 160 includes a first shielding member 161 and a second shielding member 162, both of which are slidably disposed inside the box body 100; the first shielding member 161 is disposed on the side of the isolating switch 240 facing the first direction, and is used to shield the connection point between the isolating switch 240 and the main power supply to prevent accidental contact by the operator; the second shielding member 162 is disposed on the side of the circuit breaker 220 facing the first direction, and is used to shield the output terminal of the circuit breaker 220 to prevent accidental contact by the operator.

[0106] In some embodiments, the low-voltage distribution box is provided with a protection component 160, which consists of a first shield 161 and a second shield 162, both of which are slidably installed inside the box body 100.

[0107] The first shield 161 is located on the side of the isolating switch 240 facing the first direction, and the second shield 162 is located on the side of the circuit breaker 220 facing the first direction. The two shields can slide independently, and their positions correspond to their respective protection areas.

[0108] In some embodiments, the first shield 161 slides over the outside of the wiring terminals of the isolating switch 240 and the main power supply to form a physical shield, preventing operators from accidentally touching live wiring during maintenance.

[0109] The second shielding component 162 slides to cover the outside of the output terminal of the circuit breaker 220, protecting the outgoing terminals and preventing the risk of electric shock from accidental contact. When maintenance or wiring is required, the shielding component can be slid into the enclosure 100 to expose the operating area. After operation, it can be pushed back to the shielding position for normal protection. The sliding structure does not occupy extra space, is suitable for narrow enclosure environments 100, and significantly improves the safety of power distribution system operation and maintenance without affecting normal operation.

[0110] See appendix Figure 1 -Appendix Figure 2 The low-voltage distribution box also includes a metering box 300; the metering box 300 includes an energy meter 310; the energy meter 310 is connected to the output terminal of the main power supply and is used to measure and display the electricity consumption.

[0111] In some embodiments, the low-voltage distribution box is further provided with a metering box 300, and an energy meter 310 is installed inside the metering box 300. The energy meter 310 is connected to the main power output terminal through wiring and is integrated into the box body 100 to form an integrated metering structure.

[0112] The electrical energy output from the main power supply passes through the internal sampling and metering module of the 310 energy meter to detect voltage, current and power parameters in real time, complete the cumulative metering of electricity consumption, and intuitively display the current electricity consumption through the display unit, realizing the monitoring and statistics of electricity consumption data of the power distribution system, which facilitates electricity management and energy consumption accounting.

[0113] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0114] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A low-voltage distribution box, characterized in that, include: Box (100); The power distribution mechanism (200) is located inside the enclosure (100) and includes a busbar assembly (210), a circuit breaker (220), and a grid connection interface assembly (230). The output circuit of the grid connection interface assembly (230) is connected to the input circuit of the busbar assembly (210), and the input circuit of the circuit breaker (220) is detachably connected to the output circuit of the busbar assembly (210). The input circuit of the grid connection interface assembly (230) is connected to the main power supply and the emergency power supply. When the main power supply fails, the grid connection interface assembly (230) supplies power to the power distribution mechanism (200) through the emergency power supply.

2. The low-voltage distribution box according to claim 1, characterized in that, The busbar assembly (210) includes a first phase busbar (211), a second phase busbar (212), and a third phase busbar (213); the first phase busbar (211), the second phase busbar (212), and the third phase busbar (213) are spaced apart along a first direction; The grid connection interface component (230) includes a first row (231), a second row (232) and a third row (233); The output terminal of the first row (231) is connected to the input terminal of the first phase row (211); the output terminal of the second row (232) is connected to the input terminal of the second phase row (212); and the output terminal of the third row (233) is connected to the input terminal of the third phase row (213).

3. The low-voltage distribution box according to claim 2, characterized in that, The first row (231) includes a plurality of first terminals (2311), which are used to connect to the L1 phase of the three-phase emergency power supply; And / or, the second row (232) includes a plurality of second terminals (2321) for connecting to the L2 phase of the three-phase emergency power supply; And / or, the third row (233) includes a plurality of third terminals (2331), which are used to connect to the L3 phase of the three-phase emergency power supply.

4. The low-voltage distribution box according to claim 2, characterized in that, The circuit breaker (220) includes a first clamping member (221), a second clamping member (222) and a third clamping member (223); The input terminal of the first clamp (221) is connected to the output terminal of the first phase block (211); the input terminal of the second clamp (222) is connected to the output terminal of the second phase block (212); and the input terminal of the third clamp (223) is connected to the output terminal of the third phase block (213).

5. The low-voltage distribution box according to claim 4, characterized in that, The power distribution mechanism (200) also includes a mounting base plate (250); the mounting base plate (250) has a slot (251); The circuit breaker (220) includes a positioning seat (224), which includes a plug-in portion (2241); the plug-in portion (2241) is detachably disposed in the slot (251), and the main body of the circuit breaker (220) is detachably disposed on the mounting base plate (250) via the positioning seat (224).

6. The low-voltage distribution box according to claim 1 or 2, characterized in that, The power distribution mechanism (200) also includes an isolating switch (240); The isolating switch (240) is disposed between the grid-connected interface component (230) and the main power supply; the isolating switch (240) is used to control the opening and closing states of the main power supply and the power distribution mechanism (200).

7. The low-voltage distribution box according to claim 6, characterized in that, The enclosure (100) includes a first door panel (110), a second door panel (120), and a third door panel (130). The first door panel (110) is rotatably mounted on the enclosure (100) in the second direction. The operator can open the first door panel (110) to inspect the grid connection interface assembly (230). The second door panel (120) is rotatably mounted on the enclosure (100) in the third direction. The operator can open the second door panel (120) to inspect the isolating switch (240). The third door panel (130) is rotatably mounted on the enclosure (100) in the third direction. The operator can open the third door panel (130) to inspect the busbar assembly (210) and the circuit breaker (220).

8. The low-voltage distribution box according to claim 7, characterized in that, The first door panel (110) is provided with a first limiting part (111) on the side facing the second door panel (120), and the second door panel (120) is provided with a second limiting part (121) on the side facing the first door panel (110). The first limiting part (111) is configured to limit the second limiting part (121). When the second door panel (120) needs to be opened, the first door panel (110) rotates upward along the first direction to shield and protect the power distribution mechanism (200) inside the box (100). And / or, the housing (100) further includes a rain cover; the rain cover is disposed on the opposite side of the housing (100) to protect it from rain.

9. The low-voltage distribution box according to claim 6, characterized in that, The low-voltage distribution box also includes a positioning element (140). The positioning element (140) is detachably mounted on the box body (100), and the box body (100) is detachably mounted on the distribution box frame via the positioning element (140); And / or, the low-voltage distribution box further includes a heat dissipation assembly (150); the heat dissipation assembly (150) includes a fan (151) and a heat dissipation duct (152). The fan (151) is located inside the housing (100), with the air inlet of the fan (151) located inside the housing (100) and the air outlet of the fan (151) located outside the housing (100); the heat dissipation groove (152) is formed on the outer wall of the housing (100) for communicating with the outside air. And / or, the low-voltage distribution box also includes a protection component (160). The protection component (160) includes a first shield (161) and a second shield (162), both of which are slidably disposed inside the housing (100). The first shield (161) is disposed on the side of the isolating switch (240) facing the first direction, and is used to shield the connection point between the isolating switch (240) and the main power supply to prevent accidental contact by the operator. The second shielding member (162) is disposed on the side of the circuit breaker (220) facing the first direction, and is used to shield the output terminal of the circuit breaker (220) to prevent the operator from accidentally touching it.

10. The low-voltage distribution box according to claim 1 or 2, characterized in that, The low-voltage distribution box also includes a metering box (300). The metering box (300) includes an electricity meter (310); the electricity meter (310) is connected to the output circuit of the main power supply and is used to measure and display electricity consumption.

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