Multi-bus system for power distribution cabinet and power distribution cabinet with multi-bus system

Abstract

The utility model relates to a multi-bus system for a power distribution cabinet and the power distribution cabinet with the multi-bus system. The power distribution cabinet comprises a cabinet body used for installing the multi-bus system, the multi-bus system comprises an insulation support, two transverse sides of the insulation support are installed in the cabinet body, and the insulation support vertically extends in the cabinet body; the at least two groups of main buses are mounted on the longitudinal side of the insulating bracket at intervals relative to each other in the vertical direction, and each group of main buses transversely extend to exceed the transverse side of the insulating bracket and penetrate through the transverse side of the adjacent cabinet body to be connected with an external power supply or an external load; and the at least two groups of power distribution buses are respectively connected to the longitudinal sides, deviating from the insulating bracket, of the at least two groups of main buses so as to be connected with functional units positioned on the longitudinal sides of the insulating bracket in the cabinet body.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a multi-bus system for a distribution cabinet and a distribution cabinet having the same. Background Art

[0002] As an important device in the power system, the distribution cabinet is widely used in various industries, such as the power industry, the construction industry, the environmental protection industry, the chemical industry, and the nuclear power industry, etc., for protecting and controlling the power consumption units during power distribution. Among them, the distribution cabinet may include a main bus for externally connecting to an external power source and a distribution bus connected between the main bus and the power consumption unit to distribute and transmit the electric energy provided by the external power source to the power consumption unit. In the prior art, the main bus is usually installed at the top of the cabinet body of the distribution cabinet by means of a bus bar clamp, but the connection strength between the bus bar clamp and the main bus is limited, and this arrangement will increase the overall size of the distribution cabinet and is not convenient for the construction personnel to install and operate and maintain the main bus. More importantly, the top space of the cabinet body of the distribution cabinet is limited, which will result in a limited number of main buses that can be arranged and the corresponding limited number of external power sources that can be connected, thus unable to meet the increasing demand for capacitance and unable to be applicable to important occasions with higher requirements for power quality.

[0003] Therefore, there is a need in the art for a multi-bus system for a distribution cabinet with higher connection strength, convenient operation and maintenance, and wide applicability. Summary of the Utility Model

[0004] The utility model aims to provide a multi-bus system for a distribution cabinet that can at least solve some of the above problems.

[0005] The utility model also aims to provide a distribution cabinet applying the improved multi-bus system.

[0006] According to one aspect of the utility model, there is provided a multi-bus system for a distribution cabinet, the distribution cabinet including a cabinet body for installing the multi-bus system, the multi-bus system including: an insulating bracket, the transverse two sides of which are installed inside the cabinet body and extend vertically in the cabinet; at least two groups of main buses, which are installed on the longitudinal side of the insulating bracket at intervals relative to each other in the vertical direction, each group of main buses extending horizontally beyond the transverse side of the insulating bracket and passing through the adjacent transverse side of the cabinet body to be connected to an external power source or an external load; at least two groups of distribution buses, which are respectively connected to the longitudinal side of the at least two groups of main buses facing away from the insulating bracket to be connected to the functional units located on the longitudinal side of the insulating bracket in the cabinet.

[0007] Compared with the prior art, the multi-busbar system in the present utility model may include an insulating bracket extending vertically inside the cabinet of an applicable power distribution cabinet. Sufficient vertical space may be provided on the insulating bracket for arranging a desired number of main busbars. The main busbars are then connected to the functional units inside the cabinet via corresponding distribution busbars, which can provide users with a sufficient number of power supply schemes and load control schemes. In addition, at least two groups of main busbars arranged at vertical intervals along the insulating bracket are also beneficial for heat dissipation.

[0008] Preferably, the longitudinal surface of the insulating bracket is configured as a flat surface.

[0009] Preferably, the multi-busbar system further includes fasteners. Each group of main busbars includes a positive busbar and a negative busbar that extend horizontally and are spaced apart from each other longitudinally. And the positive busbar and the negative busbar of each group of main busbars are configured to respectively fit against the two longitudinal sides of the insulating bracket and can be fixed to the two longitudinal sides of the insulating bracket by means of the fasteners.

[0010] Preferably, the multi-busbar system further includes fasteners. Each group of main busbars includes an A-phase busbar, a B-phase busbar, and a C-phase busbar that extend horizontally and are spaced apart from each other vertically. And the A-phase busbar, the B-phase busbar, and the C-phase busbar of each group of main busbars are configured to fit against one longitudinal side of the insulating bracket and can be fixed thereto by means of the fasteners.

[0011] Preferably, the positive busbar and the negative busbar of at least one group of main busbars among the at least two groups of busbars are configured as laminated conductive bars arranged at vertical intervals longitudinally.

[0012] Preferably, the insulating bracket includes a pair of support profiles extending vertically and spaced apart from each other horizontally.

[0013] Preferably, the multi-busbar system further includes positioning members located on the horizontal sides of each support profile facing away from the other support profile and extending longitudinally without exceeding the corresponding support profile, so that each support profile is installed on the cabinet by means of the positioning members.

[0014] Preferably, recesses extending vertically are provided on the horizontal sides of each support profile facing away from the other support profile to accommodate the corresponding positioning members.

[0015] Preferably, the at least two groups of main busbars are configured as at least three groups of main busbars. And at least two groups of main busbars among the at least three groups of main busbars are configured to be connected to different external power supplies and connected to different functional units inside the cabinet. And at least one group of main busbars among the at least three groups of main busbars is configured to be connected to an external load, and the distribution busbar connected to this group of main busbars is configured to be connected to all the functional units inside the cabinet.

[0016] According to another aspect of the present utility model, there is also provided a power distribution cabinet, which includes a multi-busbar system and a cabinet body for installing the multi-busbar system, and the multi-busbar system is the aforementioned multi-busbar system.

[0017] Some of the other features and advantages of the present utility model will be apparent to those skilled in the art after reading this application, and the other part will be described in combination with the accompanying drawings in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Hereinafter, embodiments of the present utility model will be described in detail with reference to the accompanying drawings, where:

[0019] Figure 1 is a three-dimensional schematic view of the multi-busbar system according to the present utility model;

[0020] Figure 2 is a side view of the multi-busbar system according to the present utility model;

[0021] Figure 3 is a front view of the multi-busbar system according to the present utility model;

[0022] Figure 4 is a top view of the multi-busbar system according to the present utility model.

[0023] Description of the reference numerals in the drawings:

[0024] 100 - multi-busbar system; 10 - insulating bracket; 11 - supporting profile; 12 - recess; 21 - first main busbar; 211 - first positive busbar; 212 - first negative busbar; 22 - second main busbar; 221 - second positive busbar; 222 - second negative busbar; 23 - third main busbar; 231 - third positive busbar; 232 - third negative busbar; 31 - first distribution busbar; 311 - first vertical section; 312 - first longitudinal section; 32 - second distribution busbar; 321 - second vertical section; 322 - second longitudinal section; 323 - vertical connection section; 33 - third distribution busbar; 331 - third vertical section; 332 - third longitudinal section; 40 - fastener; 50 - positioning member; 60 - cable connection section; 70 - support member. DETAILED DESCRIPTION

[0025] Now referring to the accompanying drawings, a schematic solution of the multi-busbar system of the power distribution cabinet disclosed by the present utility model will be described in detail. Although the accompanying drawings are provided to present some embodiments of the present utility model, the drawings do not have to be drawn according to the dimensions of the specific implementation solutions, and some features may be enlarged, removed, or sectioned locally to better show and explain the disclosure of the present utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effects. The phrase "in the drawings" or similar terms appearing in the specification do not have to refer to all the drawings or examples.

[0026] Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when normally viewing the drawings. Unless otherwise specified, the directional terms described in this specification are basically in accordance with the conventional directions understood by those skilled in the art.

[0027] The terms "first", "the first", "second", "the second" and their similar terms used in the present utility model do not indicate any order, quantity or importance in the present utility model, but are used to distinguish one component from other components.

[0028] The terms "joined", "connected" and their similar terms used in the present utility model include both that two components are indirectly connected together by means of an intermediate layer such as an adhesive, a welding agent, etc. or an intermediate member such as a connecting member, a transition member, etc., and that two components are directly connected together without any intermediate layer such as an adhesive, a welding agent, etc. or an intermediate member such as a connecting member, a transition member, etc.

[0029] Figures 1 to 4 The multi-bus system 100 of the present utility model is shown by way of example. The multi-bus system 100 can arrange at least two groups of main buses, preferably at least three groups of main buses, in the cabinet of the applicable power distribution cabinet, so that the number of groups of main buses can be increased as much as possible on the basis of avoiding increasing its own size, thereby providing multiple power supply schemes for users. It can be understood that the "vertical" described herein is Figure 2 the up-and-down direction of the page where it is located, the "horizontal" is Figure 2 the in-out direction of the page where it is located, and the "longitudinal" is Figure 2 the left-right direction of the page where it is located.

[0030] In an embodiment not shown, the cabinet of the power distribution cabinet may include a frame structure and plate members installed on the frame structure to cooperate with the frame structure to form a plurality of compartments. The plurality of compartments may include a functional compartment, a bus compartment and a cable compartment arranged in sequence along the longitudinal direction and arranged oppositely in the longitudinal direction. One or more functional units for connecting to the main bus may be provided vertically in the functional compartment. It can be understood that other structures in the cabinet of the power distribution cabinet, such as the secondary component compartment, are not the focus of discussion of the present utility model and will not be elaborated herein.

[0031] As shown in the figure, the multi-bus system 100 may include an insulating bracket 10, at least two groups of main buses and at least two groups of distribution buses.

[0032] The lateral sides of the insulating bracket 10 can be installed on the frame structure of the cabinet body, so that the insulating bracket 10 extends vertically in the bus compartment of the cabinet body. Since the vertical dimension of the cabinet body is usually much larger than its lateral dimension and longitudinal dimension, the insulating bracket 10 can extend vertically long enough in the bus compartment of the cabinet body. At least two groups of main buses can be installed on the longitudinal sides of the insulating bracket 10 at intervals in the vertical direction. Therefore, as many main buses as possible can be arranged on the insulating bracket 10 that extends vertically long enough, and the multiple groups of main buses arranged at intervals in the vertical direction are beneficial to heat dissipation.

[0033] Each group of main buses extends laterally beyond the lateral sides of the insulating bracket 10 and passes through the lateral sides of the adjacent cabinet body, so as to be connected to a power source or a load located outside the cabinet body of the power distribution cabinet. The power source can be a commercial power supply, an uninterruptible power supply or other types of power sources, and the load can be electrical components in other switch cabinets arranged side by side with the power distribution cabinet in the lateral direction. In an embodiment not shown, the external power source and the external load can be respectively arranged on the lateral two sides of the cabinet body of the power distribution cabinet, so that the main bus extending from the lateral side of the cabinet body adjacent to the external power source is connected to the external power source, and the main bus extending from the lateral side of the cabinet body adjacent to the external load is connected to the external load.

[0034] The number of groups of the distribution buses is configured to be the same as the number of groups of the main buses. Each group of distribution buses is respectively connected to the longitudinal side of the corresponding main bus facing away from the insulating bracket 10 and extends longitudinally into the functional compartment of the cabinet body to be connected to the functional units in the functional compartment, so that the functional units in the cabinet body are powered by the main buses connected to the external power source or control the external load connected to the main buses.

[0035] As shown in the figure, three groups of main buses can be provided on the insulating bracket 10. For the convenience of clear description, the three groups of main buses are respectively labeled as the first main bus 21, the second main bus and the third main bus 23 from top to bottom. The first main bus 21 and the third main bus 23 can extend out of the cabinet body of the power distribution cabinet to be respectively connected to the external commercial power supply and the uninterruptible power supply. The second main bus can extend out of the cabinet body of the power distribution cabinet to be connected to the external load.

[0036] The longitudinal side of the first main bus 21 can be provided with a first distribution bus 31, the longitudinal side of the second main bus can be provided with a second distribution bus 32, and the longitudinal side of the third main bus 23 can be provided with a third distribution bus 33. In an exemplary embodiment not shown, the functional compartment in the cabinet body can be provided with a first functional unit and a second functional unit, and both the first functional unit and the second functional unit can be circuit breakers.

[0037] Thus, the first main bus 21 is connected to the first functional unit via the first distribution bus 31, the second main bus is connected to the first functional unit and the second functional unit via the second distribution bus 32, and the third main bus 23 is connected to the second functional unit via the third distribution bus 33. In this way, the first main bus 21 and the third main bus can independently supply power to the first functional unit and the second functional unit respectively. The external loads connected to the second main bus can be supplied by two external power sources and jointly controlled by the first functional unit and the second functional unit, which can greatly improve the power supply reliability and power consumption quality.

[0038] In an embodiment not shown, two sets of main buses or more than three sets of main buses may also be provided on the insulating bracket 10. In an embodiment not shown, all the main buses may also be used in cooperation with one functional unit or two or more functional units. In an embodiment not shown, all the main buses may be respectively connected to different external power sources. In an embodiment not shown, all the main buses may be respectively connected to different external loads.

[0039] Optionally, as shown in the figure, the multi-bus system 100 may further include a fastener 40, such as a bolt. The insulating bracket 10 may include a pair of support profiles 11 extending vertically and spaced apart from each other in the transverse direction. The longitudinal surfaces of the support profiles 11 can be configured as flat surfaces so that the main bus, which is usually configured as a busbar, can be attached to the longitudinal surfaces of the support profiles 11, thereby providing sufficient surface contact between the support profiles 11 and the main bus. Furthermore, the main bus and the support profiles 11 can be fixed by means of the fastener 40.

[0040] Among them, the main bus may include a positive busbar and a negative busbar extending in the transverse direction and spaced apart from each other in the longitudinal direction. The positive busbar and the negative busbar are respectively attached to the two longitudinal sides of the support profile 11 and fixed to the support profile 11 by means of the fastener 40. This arrangement can improve the connection strength between the positive busbar and the negative busbar and the support profile 11, so that when a short-circuit current passes through the main bus and generates a repulsive force between the positive busbar and the negative busbar, the fastener 40 can ensure reliable connection between the two without disconnection.

[0041] Optionally, as shown in the figure, the first main busbar 21 may include a first positive busbar 211 and a first negative busbar 212, the second main busbar may include a second positive busbar 221 and a second negative busbar 222, and the third main busbar 23 may include a third positive busbar 231 and a third negative busbar 232. Among them, the second positive busbar 221 and the second negative busbar 222, as well as the third positive busbar 231 and the third negative busbar 232, can all be configured as stacked conductive bars arranged at intervals in the longitudinal direction. Compared with the first positive busbar 211 and the second negative busbar 222 arranged as single-layer conductive bars, the second main busbar and the third main busbar 23 can carry a larger amount of electricity. Particularly advantageously, the multi-busbar system 100 of the present utility model can provide sufficient space for the desired number of layers of stacked conductive bars arranged for the second positive busbar 221 and the second negative busbar 222, as well as the third positive busbar 231 and the third negative busbar 232.

[0042] In an embodiment not shown, when the main busbar externally connected to an external power source in the multi-busbar system 100 is used to connect to an external AC power source, alternating current will pass through each group of main busbars. Therefore, each group of main busbars may include three-phase busbars extending in the transverse direction and spaced apart from each other in the vertical direction, namely, the A-phase busbar, the B-phase busbar, and the C-phase busbar. And each phase busbar can be attached to one longitudinal side of the support profile 11 and fixed thereto by means of fasteners 40. Similarly, each phase busbar of each group of main busbars can be configured as a stacked conductive bar arranged in the longitudinal direction, and the specific number of layers depends on the amount of electricity passing through it.

[0043] Optionally, as shown in the figure, the multi-busbar system 100 may further include positioning members 50, which can be arranged on the transverse side of the support profile 11 facing away from another support profile 11 and extend longitudinally without exceeding the corresponding support profile 11, so as to avoid affecting the longitudinal flat surface of the support profile 11. Thus, the insulating bracket 10 can be installed on the frame structure inside the cabinet by means of the positioning members 50 on its two transverse sides.

[0044] Optionally, as shown in the figure, a recess 12 extending continuously in the vertical direction is provided on the transverse side of the support profile 11 facing away from another support profile 11, so as to evenly distribute three positioning members 50 at intervals in the vertical direction inside it, thereby improving the connection reliability between the insulating bracket 10 and the frame structure inside the cabinet. Exemplarily, the positioning member 50 located in the recess 12 of the support profile 11 can extend transversely away from the support profile 11 where it is located to exceed the recess 12 where it is located, which can facilitate the operator to install the insulating bracket 10 into the cabinet. Exemplarily, the support profile 11 can be configured as a C-shaped profile. In an embodiment not shown, the support profile 11 can also be configured as an I-shaped profile. It can be understood that the specific configuration of the support profile 11 is not limited thereto, as long as the above-mentioned uses can be achieved.

[0045] Optionally, as shown in the figure, the structures of each group of distribution busbars may be different. Exemplarily, as shown in the figure, the first distribution busbar 31 may include a pair of first vertical segments 311 extending downward from the first positive busbar 211 and the first negative busbar 212, and a first longitudinal segment 312 extending forward from each first vertical segment 311 to extend beyond the insulating bracket 10 until it is connected to the first functional unit. The second distribution busbar 32 includes a pair of second vertical segments 321 extending downward from the second positive busbar 221 and the second negative busbar 222, a second longitudinal segment 322 extending forward from each second vertical segment 321 to extend beyond the insulating bracket 10, and a vertical connecting segment 323 located at the front end of each second longitudinal segment 322, wherein the vertical connecting segment 323 is used to connect the first functional unit and the second functional unit distributed vertically. The third distribution busbar 33 includes a pair of third vertical segments 331 extending upward from the third positive busbar 231 and the third negative busbar 232, and a third longitudinal segment 332 extending forward from each third vertical segment 331 to extend beyond the insulating bracket 10 to connect to the second functional unit.

[0046] It can be seen that all the distribution busbars of the multi-busbar system 100 are generally arranged within the insulating bracket 10 both vertically and horizontally, which can avoid increasing the overall size of the multi-busbar system 100 of the present utility model due to arranging the same number of distribution busbars as the number of groups of main busbars.

[0047] As shown in the figure, the multi-busbar system 100 may further include a cable connection segment 60 extending from a pair of third vertical segments 331 in a direction opposite to the extending direction of the third longitudinal segment 332 into the cable compartment of the cabinet for connection to an external cable. Exemplarily, as shown in the figure, a support member 70 extending horizontally may be provided on the cable connection segment 60 to improve the stability of a pair of cable connection segments 60 extending from the third vertical segment 331.

[0048] Optionally, as shown in the figure, the main busbar may be composed of an in-cabinet busbar located inside the cabinet and an inter-cabinet busbar extending out of the cabinet for connection to an external power source or an external load. The corresponding in-cabinet busbar and inter-cabinet busbar extend along the same horizontal direction and may be connected to each other via a fastener 40.

[0049] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments understandable to those skilled in the art.

[0050] The above are only illustrative specific embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principle of the present utility model shall fall within the scope of protection of the present utility model.

Claims

1. A multi-busbar system (100) for a power distribution cabinet, the power distribution cabinet comprising a cabinet body for mounting the multi-busbar system (100), characterized in that, The multi-busbar system (100) includes: An insulating bracket (10) whose lateral sides are mounted inside the cabinet and extend vertically within the cabinet; At least two groups of main busbars which are mounted on the longitudinal sides of the insulating bracket (10) at intervals relative to each other in the vertical direction, and each group of main busbars extends horizontally beyond the lateral sides of the insulating bracket (10) and passes through the lateral sides of the adjacent cabinet to be connected to an external power source or an external load; At least two groups of distribution busbars which are respectively connected to the longitudinal sides of the at least two groups of main busbars facing away from the insulating bracket (10) to be connected to the functional units located on the longitudinal sides of the insulating bracket (10) within the cabinet.

2. The multi-busbar system (100) for a power distribution cabinet according to claim 1, characterized in that, The longitudinal surface of the insulating bracket (10) is configured as a flat surface.

3. The multi-busbar system (100) for a power distribution cabinet according to claim 2, characterized in that, The multi-busbar system (100) further includes fasteners (40). Each group of main busbars includes a positive busbar and a negative busbar that extend horizontally and are spaced apart from each other in the longitudinal direction, and the positive busbar and the negative busbar of each group of main busbars are configured to respectively fit against the longitudinal sides of the insulating bracket (10) and can be fixed to the longitudinal sides of the insulating bracket (10) by means of the fasteners (40).

4. The multi-busbar system (100) for a power distribution cabinet according to claim 2, characterized in that, The multi-busbar system (100) further includes fasteners (40). Each group of main busbars includes an A-phase busbar, a B-phase busbar, and a C-phase busbar that extend horizontally and are spaced apart from each other in the vertical direction, and the A-phase busbar, the B-phase busbar, and the C-phase busbar of each group of main busbars are configured to fit against one longitudinal side of the insulating bracket (10) and can be fixed thereto by means of the fasteners (40).

5. The multi-bus system (100) for a power distribution cabinet according to claim 3, characterized in that, The positive busbar and the negative busbar of at least one group of main busbars among the at least two groups of busbars are configured as laminated conductive bars arranged at intervals in a longitudinal stack.

6. The multi-busbar system (100) for a power distribution cabinet according to claim 1, characterized in that, The insulating bracket (10) includes a pair of support profiles (11) that extend vertically and are spaced apart from each other in the horizontal direction.

7. The multi-busbar system (100) for a power distribution cabinet according to claim 6, characterized in that, The multi-busbar system (100) further includes positioning members (50) located on the lateral sides of each support profile (11) facing away from the other support profile (11) and extending longitudinally without exceeding the corresponding support profile (11), so that each support profile (11) is mounted to the cabinet by means of the positioning members (50).

8. The multi-busbar system (100) for a power distribution cabinet according to claim 7, characterized in that, A recess (12) that extends vertically to accommodate the corresponding positioning member (50) is provided on the lateral side of each support profile (11) facing away from the other support profile (11).

9. The multi-busbar system (100) for a power distribution cabinet according to claim 1, characterized in that, The at least two groups of main busbars are configured as at least three groups of main busbars, and at least two groups of main busbars among the at least three groups of main busbars are configured to be connected to different external power sources and connected to different functional units within the cabinet, and at least one group of main busbars among the at least three groups of main busbars is configured to be connected to an external load, and the distribution busbar connected to this group of main busbars is configured to be connected to all the functional units within the cabinet.

10. A power distribution cabinet, characterized in that, The power distribution cabinet includes a multi-busbar system (100) and a cabinet for mounting the multi-busbar system (100), and the multi-busbar system (100) is the multi-busbar system (100) according to any one of claims 1 to 9.

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