Low-voltage outgoing line contact busbar structure and low-voltage switch cabinet

Abstract

The utility model discloses a low-voltage outgoing line contact busbar structure and a low-voltage switch cabinet. The low-voltage outgoing line contact busbar structure comprises a support; the circuit breaker is arranged at the bottom end of the bracket; the contact bar is fixed through the support, and the contact bar is vertically arranged from the top end to the bottom end of the support and is further electrically connected with the circuit breaker; and the drawer wire inlet bar is fixedly connected with the bracket, and the drawer wire inlet bar is vertically arranged from the top end to the bottom end of the bracket and is further electrically connected with the circuit breaker. The extension directions of the contact bar and the drawer incoming line bar in the application file are consistent, and the contact bar and the drawer incoming line bar are vertically arranged, so that the space utilization in the bracket is optimized, the contact bar is prevented from occupying excessive transverse space, and the reasonable arrangement of outgoing cables of a user is facilitated.

Description

Technical Field

[0001] This application relates to the field of low-voltage switchgear technology, and more specifically to a low-voltage outgoing line connecting busbar structure and a low-voltage switchgear. Background Technology

[0002] Currently, in the field of low-voltage switchgear, the design of the busbar structure inside the low-voltage switchgear has a key impact on the performance and space utilization of the entire system.

[0003] In existing technologies, the common busbar structures in low-voltage switchgear have some drawbacks. For example, low-voltage switchgear solutions in related technologies often utilize a single circuit breaker, resulting in a simple busbar structure. However, when applied to hybrid interconnection switchgear, a single low-voltage switchgear needs to integrate both interconnection functions and outgoing circuits. Therefore, the busbar structure must consider the convenient and rational arrangement of user outgoing cables. In such structures, the main busbars are often arranged horizontally, leading to inefficient use of internal space within the support frame. The main busbars often occupy excessive horizontal space. This problem directly causes a series of subsequent consequences, among which the rational arrangement of user outgoing cables becomes extremely difficult. Because the horizontal space is occupied by the main busbars, the space available for outgoing cables during wiring is limited, making the wiring process complex and prone to cable crossings and tangles. This not only increases installation difficulty and time costs but may also lead to safety hazards due to improper wiring, affecting the stable operation of the entire low-voltage electrical system.

[0004] Based on this, this application aims to provide a low-voltage outgoing line connecting busbar structure to solve the technical problems of unreasonable space utilization and difficulty in rationally arranging user outgoing cables in the prior art. Utility Model Content

[0005] The purpose of this application is to provide a low-voltage outgoing line connecting busbar structure and a low-voltage switchgear to solve the technical problems of unreasonable space utilization and difficulty in reasonable arrangement of user outgoing cables in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a low-voltage outgoing line connecting busbar structure is provided, comprising: a bracket; a circuit breaker, the circuit breaker being placed at the bottom end of the bracket; a connecting busbar, the connecting busbar being fixed by the bracket and vertically arranged from the top end to the bottom end of the bracket, thereby being electrically connected to the circuit breaker; and a drawer-type cable inlet, the drawer-type cable inlet being fixedly connected to the bracket and vertically arranged from the top end to the bottom end of the bracket, thereby being electrically connected to the circuit breaker.

[0007] As a preferred embodiment, the bracket is provided with multiple drawer loops separated from the top to the bottom by a partition, and the bracket includes a front side and a rear side area. The drawer loops are located on the front side of the bracket, and the connecting bus and the drawer cable inlet are located on the rear side of the bracket.

[0008] Alternatively, the connecting bar is arranged through a plurality of the drawer circuits.

[0009] In a further preferred embodiment, the device also includes an insulator located on the rear side within the support frame, and the insulator passes through the tie bar to secure the three phases of the tie bar.

[0010] In a further preferred embodiment, the device also includes a mounting beam connected to the bracket and positioned at the rear of the bracket, and an insulator connected to the mounting beam, wherein the extension direction of the insulator is consistent with the extension direction of the outgoing cable of the drawer circuit.

[0011] Preferably, the drawer cable inlet is located close to the drawer circuit, and the drawer cable inlet is connected to the partition of the drawer circuit by a fastener.

[0012] Preferably, the narrow side of the drawer cable tray is positioned opposite the drawer circuit, and the wide side of the drawer cable tray is positioned close to the bracket.

[0013] Preferably, it also includes a neutral line transformer, which is located at the top of the bracket, and one side of the neutral line transformer is electrically connected to the tie bar, and the other side is electrically connected to the drawer inlet bar, for detecting the neutral line current.

[0014] Preferably, the circuit breaker is placed on the front side of the bracket and at the bottom of the drawer circuit.

[0015] Furthermore, this application also provides a low-voltage switchgear, comprising: a housing, wherein the housing is provided with a low-voltage outgoing line connecting busbar structure as described in any of the above claims.

[0016] Compared with the prior art, the beneficial effects of this application are as follows:

[0017] The bracket serves as a supporting frame to fix and limit the various components within the low-voltage outgoing connecting busbar structure in this application. The connecting busbar and the drawer inlet busbar are arranged parallel to each other in the spatial structure within the bracket. Unlike the horizontal arrangement of the main busbar in related technologies, the connecting busbar and the drawer inlet busbar in this application extend in the same direction and are both vertically arranged, which optimizes the space utilization inside the bracket, avoids the connecting busbar occupying too much horizontal space, and facilitates the reasonable arrangement of outgoing cables by users. Attached Figure Description

[0018] Figure 1 A schematic diagram of the low-voltage outgoing line connecting busbar structure;

[0019] Figure 2 This is a schematic diagram of the low-voltage outgoing line connecting busbar structure from a side view.

[0020] Figure 3 This is a schematic diagram of the low-voltage outgoing line connecting busbar structure, viewed primarily from the drawer circuit side.

[0021] In the diagram: 1. Low-voltage outgoing line connecting busbar structure; 2. Top; 3. Bottom; 4. Front side; 5. Rear side; 10. Bracket; 11. Drawer circuit; 12. Fixture; 20. Circuit breaker; 30. Connecting busbar; 40. Drawer incoming line busbar; 50. Insulator; 60. Mounting beam; 70. Neutral line transformer. Detailed Implementation

[0022] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. They should not be construed as limiting the specific protection scope of this application.

[0024] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0025] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0026] In a preferred embodiment, the narrow face structure is described in [reference needed]. Figures 1 to 3This application provides a low-voltage outgoing line connecting busbar structure 1, which is applicable to cabinets with mixed outgoing circuits and connections. The busbar structure needs to consider the convenient and reasonable arrangement of user outgoing cables. Therefore, the low-voltage outgoing line connecting busbar structure 1 includes: a bracket 10; a circuit breaker 20, which is located at the bottom 3 of the bracket 10; a connecting busbar 30, which is fixed by the bracket 10 and is vertically arranged from the top 2 to the bottom 3 of the bracket 10, and is electrically connected to the circuit breaker 20; and a drawer-type cable inlet busbar 40, which is fixedly connected to the bracket 10 and is vertically arranged from the top 2 to the bottom 3 of the bracket 10, and is electrically connected to the circuit breaker 20.

[0027] In the narrow-face structure, the bracket 10 serves as a supporting frame to fix and limit the various components within the low-voltage outgoing line connecting busbar structure 1 of this application. The connecting busbar 30 is used to connect two incoming power supplies. When one power supply fails, the load can be switched through the connecting busbar 30 to ensure power supply continuity. The connecting busbar 30 and the drawer-type incoming line busbar 40 are arranged parallel to each other in the spatial structure within the bracket 10. Unlike the horizontal arrangement of the main busbar in related technologies, the connecting busbar 30 and the drawer-type incoming line busbar 40 in this application extend in the same direction, both being vertically arranged. This optimizes the space utilization inside the bracket 10, avoids the connecting busbar 30 occupying too much horizontal space, and facilitates the reasonable arrangement of outgoing cables by the user.

[0028] A narrow-face structure is preferred. The bracket 10 is divided into multiple drawer circuits 11 by partitions from the top 2 to the bottom 3. The drawer circuits 11 are used to directly supply power to downstream equipment or branch circuits, completing the final distribution of electrical energy. The bracket 10 includes a front side 4 and a rear side 5. The drawer circuits 11 are located in the front side 4 of the bracket 10, and the connecting bus 30 and the drawer cable inlet bus 40 are located in the rear side 5 of the bracket 10.

[0029] The narrow-face structure, as understood in this application, divides the internal assembly space into two areas: the front area 4 and the rear area 5. See details... Figure 2 The front 4 area is used to set up multiple drawer circuits 11, and the rear 5 area is used for the distribution of busbars, making the busbar wiring simple and clear, and reducing interference from the distribution of busbars during the user's laying of outgoing cables. Preferably, the front 4 area of ​​the bracket 10 is divided into five drawer circuits 11 by a partition provided inside the bracket 10. At the same time, the circuit breaker 20 is placed on the front 4 of the bracket 10 and at the bottom of the drawer circuits 11, which facilitates the electrical connection between the vertically arranged tie bar 30 and the drawer inlet bar 40 and the circuit breaker 20.

[0030] As another preferred option, the narrow-face structure allows the connecting strip 30 to pass through multiple drawer circuits 11. It should be noted that both the connecting strip 30 and the drawer cable outlet are located in the rear 5 area of ​​the bracket 10. In terms of spatial layout, neither the connecting strip 30 nor the drawer cable outlet affects the space of the drawer circuit 11, thus providing a better routing path for the outgoing cables.

[0031] The narrow face structure is further preferred and also includes an insulator 50, which is located on the rear side 5 inside the bracket 10 and passes through the tie bar 30 to fix the three phases of the tie bar 30. The extension direction of the insulator 50 is consistent with the extension direction of the outgoing cable of the drawer circuit 11.

[0032] The narrow-face structure includes connecting busbar 30 and drawer cable outlets, both equipped with spaced-apart A, B, and C three-phase configurations. Each phase is constructed from a conductive metal plate, such as copper or aluminum, and includes a wide-face structure on one side and a narrow-face structure on the other. Therefore, for details, please refer to... Figure 1 and Figure 2 The vertically arranged tie bar 30 has its wide side facing the drawer circuit 11. The insulator 50 is then fixed to the three-phase tie bar 30 by bolts passing through one side of the wide side structure. Meanwhile, the outgoing cable is laid from the drawer circuit 11 side towards the rear side 5 of the bracket 10. Compared to the horizontally arranged insulator 50, the insulator 50 in this application is set in the same direction as the cable laying direction, and its position avoids the cable channel. While ensuring the stability of the tie bar 30, it can effectively avoid interference between the insulator 50 and the outgoing cable, making it convenient for users to connect the wires.

[0033] It should also be noted that, regarding the narrow face structure, multiple insulators 50 are spaced apart along the extension direction of the tie bar 30. In this application, three insulators 50 are provided from the top 2 to the bottom 3 of the bracket 10, which not only fix the three phases of the tie bar 30, but also provide electrical insulation to prevent short circuits between phases or to ground in the tie bar 30.

[0034] The narrow-face structure is further optimized by including a mounting beam 60, which is connected to the bracket 10 and positioned on the rear side 5 inside the bracket 10. The insulator 50 is connected to the mounting beam 60. The mounting beam 60 improves the support stability of the insulator 50 to a certain extent. At the same time, the number of mounting beams 60 is the same as that of the insulator 50. The mounting beams 60 are arranged in the spatial structure of the rear side 5 inside the bracket 10 to avoid the drawer circuit 11. That is, the mounting beam 60 is positioned as close as possible to the partition that constitutes the drawer circuit 11, thereby avoiding the area where the drawer circuit 11 connects to the cable laying area on the rear side 5 of the bracket 10, and improving the standardization of cable laying.

[0035] The narrow-face structure is further optimized, with the drawer cable tray 40 located close to the drawer circuit 11, and the drawer cable tray 40 connected to the partition of the drawer circuit 11 by the fastener 12.

[0036] In the narrow-face structure, the drawer cable inlet 40 is vertically positioned inside the rear side 5 of the bracket 10, avoiding excessive lateral space occupation and allowing more space for the cable channel. At the same time, the drawer cable inlet 40 is connected to the partition of the drawer circuit 11 by bolts or plug-in fasteners 12. This not only avoids obstructing the cable laying in the drawer circuit 11, but also effectively improves the stability of the drawer cable inlet 40, prevents busbar displacement caused by vibration or short-circuit electrodynamics, reduces the risk of busbar deformation, and ensures long-term operational stability.

[0037] For preferred narrow-faceted structures, see [link / reference]. Figure 3 From the perspective of the drawer circuit 11, the narrow side of the drawer cable inlet 40 faces the drawer circuit 11, while the wide side of the drawer cable inlet 40 is close to the bracket 10. That is, all three phase circuits of the drawer cable inlet 40 face the drawer circuit 11 through the narrow side to avoid the outgoing cables being blocked by the drawer cable inlet 40 when passing through the drawer circuit 11, thus increasing the cable passage area. At the same time, the three phases of the drawer cable inlet 40 are located near the side edge of the bracket 10. The end of the drawer cable inlet 40 used to connect to the circuit breaker 20 is bent after extending out of the drawer circuit 11 to connect to the circuit breaker 20, thereby providing the maximum operable area for the outgoing cables to pass through the drawer circuit 11, which facilitates cable laying and subsequent cable maintenance.

[0038] The preferred narrow-face structure also includes a neutral line transformer 70, which is located at the top 2 of the bracket 10. One side of the neutral line transformer 70 is electrically connected to the tie bar 30, and the other side is electrically connected to the drawer inlet bar 40 for detecting the neutral line current.

[0039] Specifically, in the narrow-face structure, the neutral line transformer 70 is connected to the tie bar 30 on one side and the drawer inlet bar 40 on the other side, so as to directly monitor the total current flowing through the neutral line, avoid detection errors caused by the dispersion of current in the branch circuit, and ensure data accuracy. At the same time, the top 2 is the upper space of the bracket 10, away from the dense cable area at the bottom, to prevent the transformer from occupying the cable laying path and to ensure the neat arrangement of the outgoing cables.

[0040] The narrow-face structure of the neutral line transformer 70, located at the top 2 of the bracket 10, is far away from the heat-generating area of ​​the high-current busbar, such as the connection of the circuit breaker 20, thereby preventing the transformer from drifting or being damaged due to increased ambient temperature.

[0041] Furthermore, this application also provides a low-voltage switchgear, including: a housing, and a low-voltage outgoing line connecting busbar structure 1 as described in any of the above.

[0042] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A low-voltage outgoing line tie busbar structure, characterized by, It comprises: a bracket; a circuit breaker placed at the bottom end of the bracket; a contact bus fixed by the bracket, and the contact bus is vertically arranged from the top end to the bottom end of the bracket, and is electrically connected with the circuit breaker; a drawer incoming line bus fixedly connected with the bracket, and the drawer incoming line bus is vertically arranged from the top end to the bottom end of the bracket, and is electrically connected with the circuit breaker.

2. The low-voltage outgoing line contact bus structure according to claim 1, wherein: the bracket is divided into a plurality of drawer circuits by a partition plate from the top end to the bottom end, and the bracket comprises a front side area and a rear side area, the drawer circuits are arranged in the front side area of the bracket, and the contact bus and the drawer incoming line bus are arranged in the rear side area of the bracket.

3. The low-voltage outgoing line contact bus structure according to claim 2, wherein: the contact bus passes through the plurality of drawer circuits.

4. The low-voltage outlet feeder busbar structure of claim 2, wherein, It further comprises: an insulator arranged in the rear side area of the bracket, and the insulator passes through the contact bus to fix the three phases of the contact bus.

5. The low-voltage outlet feeder busbar structure of claim 4, wherein, It further comprises: a mounting beam connected with the bracket, and the mounting beam is arranged in the rear side area of the bracket, the insulator is connected with the mounting beam, and the extension direction of the insulator is consistent with the extension direction of the outgoing cable of the drawer circuit.

6. The low-voltage outgoing line contact bus structure according to claim 2, wherein: the drawer incoming line bus is arranged close to the drawer circuit, and the drawer incoming line bus is connected with the partition plate of the drawer circuit by a fixing member.

7. The low-voltage outgoing line contact bus structure according to claim 6, wherein: one side of the narrow surface structure of the drawer incoming line bus is arranged opposite to the drawer circuit, and one side of the wide surface structure of the drawer incoming line bus is arranged close to the bracket.

8. The low-voltage outlet feeder busbar structure of any one of claims 1-7, wherein, It further comprises: a neutral line transformer arranged at the top end of the bracket, and one side of the neutral line transformer is electrically connected with the contact bus, and the other side is electrically connected with the drawer incoming line bus, so as to detect the neutral line current.

9. The low-voltage outgoing line contact bus structure according to any one of claims 2-7, wherein: the circuit breaker is arranged at the front side of the bracket and at the bottom position of the drawer circuit.

10. A low voltage switchgear, characterized in that It comprises: a shell, and the shell is provided with the low-voltage outgoing line contact bus structure according to any one of claims 1-9.

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