An electrical equipment housing and busbar module

Abstract

The utility model relates to electrical equipment technical field, especially an electrical equipment shell and bus module, including lower casing, it includes two side plates of opposite setting, the side plate forms a number of along the height direction and presents the stepped distribution's support surface in horizontal direction, the upper casing is in the top wall and forms a number of along the height direction and presents the stepped distribution's compression surface, and with lower casing detachable connection. Among them, the compression surface and support surface are opposite and interval setting in the height direction. The utility model discloses a stepped distribution's support surface on the lower casing is designed, and the integrated fastening structure that is constituted by compression surface and side fixed surface is designed with accurate correspondence on the upper casing, and the stable fixing of inside multilayer module is realized by the shell itself. The structure completely eliminates the demand of additional fastener such as screw, stud, greatly simplifies the assembly process.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and in particular to an electrical equipment housing and busbar module. Background Technology

[0002] In low-voltage power distribution equipment such as intelligent busbar modules, multi-layer PCBs are typically securely fixed inside a housing to enable functions such as electrical parameter monitoring and temperature control. Currently, the common method for securing multi-layer PCBs within the housing is by screw fastening. Specifically, through holes are made at the corners of the PCBs, and corresponding threaded posts are installed inside the housing. Multiple screws are then tightened to secure each PCB layer to the housing.

[0003] However, this traditional screw-fixing method has several inherent drawbacks: First, the assembly process is cumbersome, requiring each screw to be aligned and tightened individually, severely impacting production efficiency and making it difficult to adapt to the demands of large-scale, automated production, resulting in high labor and time costs. Second, the use of fasteners such as screws and studs increases the variety of materials and management costs. Third, in vibrating environments, screws are at risk of loosening, affecting the reliability of the connection. Furthermore, when an internal module malfunctions and needs replacement, maintenance personnel must use tools to unscrew multiple screws, which is inconvenient and inefficient. Therefore, improvements are needed. Utility Model Content

[0004] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0005] To address the shortcomings of existing technologies, one objective of this utility model is to provide an electrical equipment housing and busbar module.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an electrical equipment housing, comprising a lower housing, which includes two side plates arranged opposite to each other, the side plates having a plurality of support surfaces distributed in a stepped manner along the height direction in the horizontal direction; an upper housing, the upper housing having a plurality of pressing surfaces distributed in a stepped manner along the height direction on its inner top wall, and being detachably connected to the lower housing; wherein the pressing surfaces and the support surfaces are arranged opposite to each other and spaced apart in the height direction.

[0007] In a preferred embodiment of the electrical equipment housing of this utility model, the plurality of supporting surfaces include a first supporting surface, a second supporting surface, and a third supporting surface that are stacked sequentially in the height direction; wherein, the second supporting surface is higher than the first supporting surface, the third supporting surface is higher than the second supporting surface, the third supporting surface is recessed in the upper end surface of the side plate, and a support portion is provided on one of the opposite sides of the two side plates, and the first supporting surface is provided on the upper end surface of the support portion.

[0008] In a preferred embodiment of the electrical equipment housing of this utility model, the plurality of pressing surfaces are arranged in a height direction as a first pressing surface, a second pressing surface, and a third pressing surface, which are stacked sequentially; wherein the second pressing surface is higher than the first pressing surface, the third pressing surface is higher than the second pressing surface, the first pressing surface and the first supporting surface are spaced apart and opposite each other in the height direction, the second pressing surface and the second supporting surface are spaced apart and opposite each other in the height direction, and the third pressing surface and the third supporting surface are spaced apart and opposite each other in the height direction.

[0009] In a preferred embodiment of the electrical equipment housing of this utility model, the inner sidewall of the upper housing is formed with a plurality of side fixing surfaces connected to the pressing surface along the height direction. The side fixing surfaces are stacked sequentially in the height direction as a first side fixing surface, a second side fixing surface, and a third side fixing surface. The second side fixing surface is higher than the first side fixing surface, the third side fixing surface is higher than the second side fixing surface, the first side fixing surface is flush with the edge of the first supporting surface, the second side fixing surface is flush with the edge of the second supporting surface, and the third side fixing surface is flush with the edge of the third supporting surface.

[0010] As a preferred embodiment of the electrical equipment housing of this utility model, the lower housing further includes a base connected to the two side plates, and two anti-mistake elements higher than the third support surface are asymmetrically arranged on the base between the two side plates. The upper housing is provided with anti-mistake slots that match the shape of the two anti-mistake elements.

[0011] As a preferred embodiment of the electrical equipment housing of this utility model, wherein: one of the anti-foolproof components is provided with a first anti-foolproof slope, and one of the anti-foolproof slots is provided with a second anti-foolproof slope that matches the shape of the anti-foolproof slope.

[0012] As a preferred embodiment of the electrical equipment housing of this utility model, two anti-foolproof positioning elements connected to the base are asymmetrically arranged on one side of the two side plates facing each other.

[0013] As a preferred embodiment of the electrical equipment housing of this utility model, the base is provided with a protrusion that connects to the side plate, the upper housing is provided with a recess that matches the shape of the protrusion, the inner side wall of the upper housing is provided with a first protrusion, the inner side wall of the upper housing and above the first protrusion is provided with a groove, the side plate is recessed with a guide groove that slides with the first protrusion, and the guide groove is provided with a second protrusion that engages with the groove.

[0014] To address the shortcomings of existing technologies, one objective of this utility model is to provide a busbar module.

[0015] To achieve the above objectives, the present invention adopts the following technical solution: a busbar module, comprising an upper module, which includes an upper PCB board stacked on several third support surfaces and in contact with a third pressing surface; a middle module, which includes a middle PCB board stacked on several second support surfaces and in contact with a second pressing surface; and a lower module, which includes a lower PCB board stacked on several first support surfaces and in contact with a third pressing surface; wherein the sides of the upper module, middle module, and lower module are flush with the edges of the first support surface, the second support surface, and the third support surface, respectively.

[0016] As a preferred embodiment of the busbar module of this utility model, the upper PCB board and the middle PCB board are respectively provided with a first extension and a second extension of matching shape at the positions of the side edges facing the third support surface and the second support surface, and the lower PCB board is provided with two asymmetrically arranged positioning holes that are engaged with the anti-foolproof positioning component.

[0017] The beneficial effects of the electrical equipment housing and busbar module of this utility model are as follows: 1. By designing a stepped support surface on the lower shell and a precisely corresponding integrated fastening structure consisting of a clamping surface and side fixing surfaces on the upper shell, the internal multi-layered modules are securely fixed using the shell itself. During assembly, the internal modules simply need to be placed on the support surface. After closing the upper shell, the clamping surface provides vertical clamping force, while the side fixing surfaces achieve precise lateral restraint through flush engagement with the edges of the support surface. This structure completely eliminates the need for additional fasteners such as screws and studs, greatly simplifying the assembly process.

[0018] 2. By setting asymmetrical error-proof elements (such as the cooperation between error-proof grooves and error-proof parts, and error-proof positioning parts and positioning ports), these elements ensure that the upper and lower housings, and the internal modules and housings can only be assembled in one correct direction, thereby fundamentally eliminating the phenomenon of incorrect or reverse assembly caused by operational negligence, and greatly improving the safety and reliability of the product during installation and maintenance. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the lower shell and the supporting surface of this utility model.

[0021] Figure 2 This is a schematic diagram of the side fixing surface, the pressing surface, and the lower shell of this utility model.

[0022] Figure 3 This is a schematic diagram of the upper and lower shells of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the support part of this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the second anti-foolproof inclined surface of this utility model.

[0025] Figure 6 This is a schematic diagram of the structure of the first protrusion, the second protrusion, and the groove of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the foolproof positioning component of this utility model.

[0027] Figure 8 This is a structural schematic diagram of the upper module, middle module, lower module and lower shell of this utility model.

[0028] Figure 9 This is a planar sectional view of the entire utility model.

[0029] Figure 10 This is a schematic diagram of the overall design of this utility model.

[0030] Figure 11 This is an overall exploded view of the present invention. Detailed Implementation

[0031] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0032] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0033] Reference Figures 1-4 This embodiment provides an electrical equipment housing, including a lower housing 101, which includes two opposing side plates 101a. The side plates 101a have a plurality of support surfaces C distributed in a stepped manner along the height direction in the horizontal direction. An upper housing 102 has a plurality of pressing surfaces S distributed in a stepped manner along the height direction on its inner top wall, and is detachably connected to the lower housing 101. The pressing surfaces S and the support surfaces C are opposite to each other and spaced apart in the height direction.

[0034] The precise structure of the upper and lower shells 101 enables accurate positioning, stable fixation, and efficient protection of the internal multi-layer functional modules.

[0035] The electrical equipment enclosure is mainly composed of a lower housing 101 and an upper housing 102, which are connected in a detachable manner to form a sealed protective space. The lower housing 101, as the basic load-bearing component of the entire structure, adopts a stepped modular load-bearing structure.

[0036] Specifically, the two side plates 101a on the lower housing 101 extend in the horizontal direction to form multiple support surfaces C that are distributed in a stepped manner along the height direction. Through this stepped layout, independent and non-interfering installation positions can be pre-planned for built-in modules (such as multi-layer PCB boards) of different heights and functions.

[0037] As a cover component, the upper housing 102 also has multiple pressing surfaces S arranged in a stepped pattern along its height on its inner top wall. When the upper housing 102 and the lower housing 101 are properly closed, the pressing surfaces S correspond one-to-one with the supporting surfaces C on the lower housing 101 in the height direction, maintaining a certain distance. This design ensures that when the internal module is placed on the supporting surface C, closing the upper housing 102 allows the pressing surfaces S to apply pressure evenly from above, working in conjunction with the supporting surfaces C below, like a "sandwich" structure, firmly pressing the internal module into the preset accommodating space, achieving a stable fixation without any screws.

[0038] Furthermore, the plurality of supporting surfaces C include a first supporting surface C1, a second supporting surface C2, and a third supporting surface C3 stacked sequentially in the height direction; wherein, the second supporting surface C2 is higher than the first supporting surface C1, the third supporting surface C3 is higher than the second supporting surface C2, the third supporting surface C3 is recessed in the upper end surface of the side plate 101a, and a support portion 101b is provided on the opposite side of the two side plates 101a, and the first supporting surface C1 is provided on the upper end surface of the support portion 101b.

[0039] The first support surface C1, the second support surface C2, and the third support surface C3 together form a stable three-tiered support system. Within this system, the second support surface C2 is positioned higher than the first support surface C1, while the third support surface C3 is positioned higher than the second support surface C2. This stepped arrangement, from low to high, clearly defines three independent installation levels within the longitudinal space of the shell, providing a structural foundation for accommodating internal modules of different specifications or functions.

[0040] The third supporting surface C3 of the top layer is formed by recessing it into the upper surface of the side plate 101a. By "recessing" the third supporting surface C3 into the upper surface of the side plate 101a, a portion of the topmost PCB board is "sunk" into the top of the side plate 101a. This allows the upper shell 102 to be designed to be flatter without sacrificing its supporting function, thereby achieving overall miniaturization and compactness of the product.

[0041] Since the bottommost PCB board (i.e., the lower PCB board 303a in this solution) is usually the heaviest piece (possibly integrating power modules, high-current sampling circuits, etc.), and its position determines that it is farthest from the mounting point (such as the guide rail), the leverage effect is most obvious, and it is most prone to deformation or vibration in a vibration environment. Therefore, the load-bearing structure of the first supporting surface C1 of the bottom layer has been specially reinforced.

[0042] Specifically, on each of the two side plates 101a, an inwardly protruding support portion 101b is integrally formed on opposite sides. The first support surface C1 is located on the upper end surface of this support portion 101b. The design of the support portion 101b extends and strengthens the support point of the support surface C from the "edge" of the side plate 101a to the "inside" of the housing, so that the weight of the lower PCB board 303a is more evenly distributed to the base 101c and the entire lower housing 101 structure, avoiding stress concentration, improving the mechanical reliability of the entire housing, and extending its service life.

[0043] Preferably, the first support surface C1 and the third support surface C3 can also be configured in the same way as the second support surface C2. However, this design can better fit the stepped shell configuration, making the connection of the lower PCB board 303a at the bottom more stable and the connection of the upper PCB board 301a at the top more compact. Therefore, adjusting the first support surface C1 and the third support surface C3 based on the basic support function of the second support surface C2 in this solution is the best option.

[0044] It should be noted that the number of supporting surfaces C can be made according to requirements, with a minimum of only one supporting surface C.

[0045] Furthermore, the plurality of pressing surfaces S include a first pressing surface S1, a second pressing surface S2, and a third pressing surface S3 stacked sequentially in the height direction; wherein, the second pressing surface S2 is higher than the first pressing surface S1, the third pressing surface S3 is higher than the second pressing surface S2, the first pressing surface S1 and the first supporting surface C1 are spaced apart and opposite each other in the height direction, the second pressing surface S2 and the second supporting surface C2 are spaced apart and opposite each other in the height direction, and the third pressing surface S3 and the third supporting surface C3 are spaced apart and opposite each other in the height direction.

[0046] The design employs a highly efficient multi-layered clamping system, where the clamping surface S and the supporting surface C are aligned vertically. Each pair of opposing clamping surfaces S and C forms an independent "pressure sandwich layer." This design ensures that the vertical clamping force is applied evenly and independently to the corresponding functional modules (lower, middle, and upper modules 301). This avoids stress accumulation and transmission caused by stacked installation, prevents lower modules from bearing undue pressure from upper modules, and ensures that each module can be reliably fixed without damage due to uneven stress.

[0047] Furthermore, since each layer has its own dedicated pressing surface S, modules from any layer can be removed or placed individually during installation or maintenance without interfering with other layers.

[0048] Furthermore, the inner wall of the upper housing 102 is formed with a plurality of side fixing surfaces R along the height direction and connected to the pressing surface S. The side fixing surfaces R are stacked in sequence in the height direction as a first side fixing surface R1, a second side fixing surface R2 and a third side fixing surface R3. The second side fixing surface R2 is higher than the first side fixing surface R1, the third side fixing surface R3 is higher than the second side fixing surface R2, the first side fixing surface R1 is flush with the edge of the first supporting surface C1, the second side fixing surface R2 is flush with the edge of the second supporting surface C2, and the third side fixing surface R3 is flush with the edge of the third supporting surface C3.

[0049] Several side fixing surfaces R also follow a stepped layout principle, stacked sequentially in the height direction to form a complete lateral fastening system. When the upper shell 102 and the lower shell 101 are closed, the flush side fixing surfaces R and the edge of the supporting surface C together form a seamless lateral limiting boundary. This allows the side of the functional module placed on the supporting surface C to contact the upper and lower parts of the shell simultaneously, forming a constraint space from bottom support to top compression, and then to full lateral enclosure.

[0050] Reference Figures 4-7 This embodiment provides an electrical equipment housing, including a lower housing 101 and a base 101c connected to two side plates 101a. The base 101c has two anti-mistake elements 101d that are asymmetrically arranged between the two side plates 101a and are higher than the third support surface C3. The upper housing 102 is provided with anti-mistake slots 102a that match the shape of the two anti-mistake elements 101d.

[0051] Furthermore, one of the anti-mistake components 101d is provided with a first anti-mistake slope 101e, and one of the anti-mistake slots 102a is provided with a second anti-mistake slope 102b that matches the shape of the anti-mistake slope.

[0052] In this design, on the base 101c of the lower housing 101, between the two side plates 101a, two mis-proofing elements 101d are asymmetrically arranged, with their height exceeding that of the third support surface C3. Precisely correspondingly, the upper housing 102 has mis-proofing slots 102a that perfectly match the shape of these two mis-proofing elements 101d. This asymmetrical design constitutes the first layer of mis-proofing mechanism: when the upper and lower housings 101 attempt to close in the wrong direction, the mis-proofing elements 101d cannot be inserted into the mis-proofing slots 102a, creating physical interference. This forces the assembler to install in only one correct direction, fundamentally eliminating the risk of reverse installation due to visual errors.

[0053] Furthermore, two foolproof positioning elements 101f, which are connected to the base 101c, are asymmetrically arranged on opposite sides of the two side plates 101a.

[0054] The two asymmetrically positioned foolproof positioning elements 101f form a second layer of foolproof mechanism for internal modules (such as the lower PCB board). Combined with the positioning port 303b, the positioning port 303b can only smoothly fit into the foolproof positioning element 101f when the module is oriented correctly, ensuring the absolute correctness of the internal electrical connections.

[0055] Furthermore, the base 101c is provided with a protrusion 101g that connects to the side plate 101a, the upper housing 102 is provided with a recess 102c that matches the shape of the protrusion 101g, the inner side wall of the upper housing 102 is provided with a first protrusion 102d, the inner side wall of the upper housing 102 and above the first protrusion 102d is provided with a groove 102e, the side plate 101a is recessed with a guide groove 101h that slides with the first protrusion 102d, and the guide groove 101h is provided with a second protrusion 101i that engages with the groove 102e.

[0056] The assembly and disassembly of the upper shell 102 and the lower shell 101 are achieved through structures such as the first protrusion 102d, the second protrusion 101i, and the groove 102e.

[0057] When assembling and connecting the upper housing 102 and the lower housing 101, the first protrusion 102d slides along the guide groove 101h, providing precise vertical guidance. When the upper housing 102 moves to the closed position, the second protrusion 101i precisely engages in the groove 102e of the upper housing 102, completing the final locking. When it is necessary to disassemble the upper housing 102 and the lower housing 101, simply pry or unfold the upper housing 102 to detach it from the lower housing 101.

[0058] Reference Figures 8-11 This embodiment provides a busbar module, including an upper module 301, which includes an upper PCB board 301a stacked on several third support surfaces C3 and in contact with a third pressing surface S3; a middle module 302, which includes a middle PCB board 302a stacked on several second support surfaces C2 and in contact with a second pressing surface S2; and a lower module 303, which includes a lower PCB board 303a stacked on several first support surfaces C1 and in contact with a third pressing surface S3; wherein the sides of the upper module 301, the middle module 302 and the lower module 303 are flush with the edges of the first support surfaces C1, the second support surfaces C2 and the third support surfaces C3, respectively.

[0059] The sides of the upper module 301, middle module 302, and lower module 303 are flush with the edges of the first support surface C1, the second support surface C2, and the third support surface C3, respectively. This ensures that after the upper housing 102 and the lower housing are assembled and closed, the sides of each module naturally fit against the side fixing surface R of the housing, forming a seamless lateral constraint. This prevents horizontal movement of the modules and improves the reliability of the product in vibration environments.

[0060] Furthermore, the upper PCB board 301a and the middle PCB board 302a have protruding first extension 301b and second extension 302b with matching shapes on their side edges facing the third support surface C3 and the second support surface C2, respectively. The lower PCB board 303a has two asymmetrically arranged positioning holes 303b that engage with the foolproof positioning member 101f.

[0061] The upper PCB board 301a and the middle PCB board 302a have protruding first extensions 301b and second extensions 302b, respectively, facing the positions of the third support surface C3 and the second support surface C2, which are respectively placed thereon. This protruding structure design allows the PCB board to fit more precisely with the support surface C when placed, playing a primary lateral positioning role and simplifying the installation process.

[0062] Meanwhile, two asymmetrically arranged positioning openings 303b are provided on the lower PCB board 303a. The positions of these two positioning openings 303b are related to the asymmetrically arranged anti-foolproof positioning elements 101f in the lower housing 101 (see...). Figure 7 This creates a one-to-one correspondence, similar to a "key and lock." Only when the orientation is completely correct can the positioning slot 303b smoothly fit into the foolproof positioning piece 101f, completing the installation; any attempt at incorrect orientation will fail due to physical interference. This constitutes a mandatory foolproof mechanism for lower-level modules, ensuring the absolute correctness of critical electrical connections such as power wiring, and fundamentally preventing equipment damage or safety accidents caused by reverse insertion.

[0063] Specifically, the upper module 301, the middle module 302, and the lower module 303 are the main control, sampling, and temperature measurement functional modules, respectively. These three modules integrate a microprocessor, a voltage and current metering chip, a temperature sensor, and a storage chip, used to realize the functions of monitoring three-phase electrical parameters of the busbar, temperature monitoring, fault diagnosis, and recording demand and extreme values.

[0064] The layout of the upper PCB board 301a, middle PCB board 302a, and lower PCB board 303a adopts a clear functional partitioning: the bottom board (lower PCB board 303a) is the voltage and current sampling board, which also serves as the power output function. The middle board (middle PCB board 302a) is the measurement and control board, used for bus temperature acquisition and control modules for switching quantities. The top board (upper PCB board 301a) is the main control board, serving as the logic control center of the entire bus monitoring system. This partitioned layout optimizes signal flow and reduces electromagnetic interference.

[0065] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways, as long as they do not depart from the scope of this utility model.

Claims

1. A housing for an electrical device, characterized in that: include, The lower housing (101) includes two opposing side plates (101a), which have a plurality of support surfaces (C) arranged in a stepped manner along the height direction in the horizontal direction. The upper housing (102) has several pressing surfaces (S) distributed in a stepped manner along the height direction on its inner top wall, and is detachably connected to the lower housing (101); The pressing surface (S) and the supporting surface (C) are opposite to each other in the height direction and are spaced apart.

2. The electrical equipment housing as described in claim 1, characterized in that: The plurality of the supporting surfaces (C) include a first supporting surface (C1), a second supporting surface (C2) and a third supporting surface (C3) stacked sequentially in the height direction. Wherein, the second supporting surface (C2) is higher than the first supporting surface (C1), the third supporting surface (C3) is higher than the second supporting surface (C2), the third supporting surface (C3) is recessed on the upper end surface of the side plate (101a), and a support portion (101b) is provided on the opposite side of the two side plates (101a), and the first supporting surface (C1) is provided on the upper end surface of the support portion (101b).

3. The electrical equipment housing as described in claim 2, characterized in that: The plurality of pressing surfaces (S) include a first pressing surface (S1), a second pressing surface (S2) and a third pressing surface (S3) stacked sequentially in the height direction; Wherein, the second pressing surface (S2) is higher than the first pressing surface (S1), the third pressing surface (S3) is higher than the second pressing surface (S2), the first pressing surface (S1) and the first supporting surface (C1) are spaced apart from each other in the height direction, the second pressing surface (S2) and the second supporting surface (C2) are spaced apart from each other in the height direction, and the third pressing surface (S3) and the third supporting surface (C3) are spaced apart from each other in the height direction.

4. The electrical equipment housing as described in claim 2 or 3, characterized in that: The inner wall of the upper housing (102) is formed with a plurality of side fixing surfaces (R) connected to the pressing surface (S) along the height direction. The side fixing surfaces (R) are stacked in sequence in the height direction as a first side fixing surface (R1), a second side fixing surface (R2) and a third side fixing surface (R3). Wherein, the second side fixing surface (R2) is higher than the first side fixing surface (R1), the third side fixing surface (R3) is higher than the second side fixing surface (R2), the first side fixing surface (R1) is flush with the edge of the first supporting surface (C1), the second side fixing surface (R2) is flush with the edge of the second supporting surface (C2), and the third side fixing surface (R3) is flush with the edge of the third supporting surface (C3).

5. The electrical equipment housing as described in claim 2 or 3, characterized in that: The lower housing (101) also includes a base (101c) connected to the two side plates (101a). The base (101c) has two anti-mistake elements (101d) that are asymmetrically arranged between the two side plates (101a) and are higher than the third support surface (C3). The upper housing (102) is provided with anti-mistake slots (102a) that match the shape of the two anti-mistake elements (101d).

6. The electrical equipment housing as described in claim 5, characterized in that: One of the anti-mistake components (101d) is provided with a first anti-mistake slope (101e), and one of the anti-mistake slots (102a) is provided with a second anti-mistake slope (102b) that matches the shape of the anti-mistake slope.

7. The electrical equipment housing as described in claim 5, characterized in that: Two foolproof positioning elements (101f) are asymmetrically arranged on opposite sides of the two side plates (101a) and connected to the base (101c).

8. The electrical equipment housing as described in claim 6 or 7, characterized in that: The base (101c) is provided with a protrusion (101g) that connects to the side plate (101a). The upper shell (102) is provided with a recess (102c) that matches the shape of the protrusion (101g). The inner sidewall of the upper shell (102) is provided with a first protrusion (102d). The inner sidewall of the upper shell (102) and above the first protrusion (102d) is provided with a groove (102e). The side plate (101a) is recessed with a guide groove (101h) that slides with the first protrusion (102d). The guide groove (101h) is provided with a second protrusion (101i) that engages with the groove (102e).

9. A busbar module, characterized in that: include, The upper module (301) includes an upper PCB board (301a) stacked on a plurality of third support surfaces (C3) and in contact with a third pressing surface (S3); The middle module (302) includes a middle PCB board (302a) stacked on a plurality of second support surfaces (C2) and in contact with the second pressing surface (S2); The lower module (303) includes a lower PCB board (303a) stacked on a plurality of first support surfaces (C1) and in contact with a third pressing surface (S3); The sides of the upper module (301), middle module (302) and lower module (303) are flush with the edges of the first support surface (C1), the second support surface (C2) and the third support surface (C3), respectively.

10. The bus module as described in claim 9, characterized in that: The upper PCB board (301a) and the middle PCB board (302a) have a first extension (301b) and a second extension (302b) with matching shapes protruding from their side edges toward the third support surface (C3) and the second support surface (C2), respectively. The lower PCB board (303a) has two asymmetrically arranged positioning holes (303b) that engage with the foolproof positioning component (101f).

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