Large-current low-voltage switch cabinet bus structure

Abstract

The utility model discloses a large-current low-voltage switch cabinet bus structure, and belongs to the technical field of low-voltage electrical equipment. The bus structure of the high-current low-voltage switch cabinet comprises a cabinet body, a main bus, a frame circuit breaker, an upper branch bar, a busbar and a side turning bar. The main bus is arranged at the upper part of the cabinet body, the frame circuit breaker is arranged at the middle part of the cabinet body, the frame circuit breaker comprises a first connecting port and a second connecting port, and the first connecting port and the second connecting port are vertical interfaces; the upper branch bar is connected with the first connecting port and the main bus, and the upper branch bar extends in the vertical direction; the L-shaped bus bar is connected with the second connecting port and the side turning bar, and the side turning bar is connected with the main bus. According to the bus structure of the high-current low-voltage switch cabinet, the bus bar is good in heat dissipation performance and high in current-carrying capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of low - voltage electrical equipment, in particular to a bus structure of a low - voltage switchgear cabinet with large current. Background Art

[0002] In a low - voltage switchgear cabinet, a frame circuit breaker and a main bus are arranged in the cabinet body. The horizontally - arranged interface of the frame circuit breaker is a horizontal interface. The frame branch row adopts a horizontal wiring method. The upper branch row is fixed on the crossbeam of the cabinet body through a low - voltage insulator and is overlapped with the main bus. The lower branch row is connected to the side - turned row through a busbar and then connected to the main bus. The upper branch row includes a plurality of busbars. When the busbars are placed horizontally, they are stacked, with poor heat dissipation, serious heating, small current - carrying capacity, and a large amount of copper busbar used.

[0003] Therefore, there is an urgent need for a bus structure of a low - voltage switchgear cabinet with large current to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a bus structure of a low - voltage switchgear cabinet with large current, which has good heat dissipation of the busbar and high current - carrying capacity.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bus structure of a low - voltage switchgear cabinet with large current, comprising:

[0007] A cabinet body;

[0008] A main bus, arranged at the upper part of the cabinet body;

[0009] A frame circuit breaker, arranged in the middle of the cabinet body. The frame circuit breaker includes a first connection port and a second connection port, and both the first connection port and the second connection port are vertical interfaces;

[0010] An upper branch row, connecting the first connection port and the main bus, and the upper branch row extends vertically;

[0011] A busbar, in an L shape, and one end of the busbar is connected to the second connection port;

[0012] A side - turned row, connecting the other end of the busbar and the main bus.

[0013] In some possible implementation manners, a first installation beam is arranged in the cabinet body, the first installation beam is arranged horizontally, and the upper branch row is fixed to the first installation beam through a first wire clamp.

[0014] In some possible implementation manners, at least two first installation beams arranged vertically are arranged in the cabinet body, and the upper branch row is fixed to at least two first installation beams.

[0015] In some possible embodiments, the first mounting beam is disposed vertically between the main busbar and the frame circuit breaker.

[0016] In some possible embodiments, the upper branch busbar includes three-phase busbars, the busbars extend vertically, and the low-voltage switchgear busbar structure with large current includes nine current transformers, and three of the current transformers are respectively installed corresponding to each of the three-phase busbars.

[0017] In some possible embodiments, the main busbar is fixedly disposed at the upper part of the cabinet body through a busbar clamp.

[0018] In some possible embodiments, it further includes a fixed busbar fixed in the cabinet body, the fixed busbar extends horizontally, one end is connected to the first connection port, and the upper branch busbar is connected to the fixed busbar.

[0019] In some possible embodiments, the upper branch busbar includes three-phase busbars, the busbars extend vertically, and the number of layers of each phase of the busbar is not less than four.

[0020] In some possible embodiments, the cabinet body is provided with a second mounting beam, the second mounting beam is arranged horizontally, and the busbar is fixedly disposed on the second mounting beam through a second wire clamp.

[0021] In some possible embodiments, the side-turning busbar is fixedly disposed on the cabinet body through a third wire clamp.

[0022] Advantages of the present utility model:

[0023] A low-voltage switchgear busbar structure with large current provided by the present utility model, by setting both the first connection port and the second connection port of the frame circuit breaker as vertical connection ports, enables the three-phase busbars of the upper branch busbar to be vertically placed and enables the L-shaped busbar to connect the second connection port and the side-turning busbar. Since each phase of the busbar has multiple layers, vertical placement of the busbars can make the busbar distribution uniform, with good heat dissipation and high current-carrying capacity, solving the problem of serious heating of multi-layer busbars. And vertical placement of the busbars leaves enough space in the cabinet body for the layout of other structures. Through the L-shaped busbar, the lower branch busbar in the prior art is saved, thereby simplifying the structure, saving the amount of copper busbar used, and reducing costs. Description of the drawings

[0024] Figure 1 is the rear view of the low-voltage switchgear busbar structure with large current provided by the specific embodiment of the present utility model;

[0025] Figure 2 is the front view of the low-voltage switchgear busbar structure with large current provided by the specific embodiment of the present utility model;

[0026] Figure 3 It is the right view of the busbar structure of a low-voltage switchgear with high current provided by the specific embodiment of the present utility model without side-turning rows;

[0027] Figure 4 It is the right view of the busbar structure of a low-voltage switchgear with high current provided by the specific embodiment of the present utility model without busbars and upper branch rows;

[0028] Figure 5 It is the top view of the busbar provided by the specific embodiment of the present utility model.

[0029] In the figure:

[0030] 1, cabinet body; 2, frame circuit breaker; 3, upper branch row; 4, current transformer; 5, busbar; 6, second wire clamp; 7, first installation beam; 8, busbar clamp; 9, first wire clamp; 10, second installation beam; 11, third wire clamp; 12, side-turning row; 13, fixed row. Specific embodiment

[0031] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to" and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the top" and "on the top" of the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below the bottom" and "under the bottom" of the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0034] like Figures 1 - 5 As shown, this embodiment provides a busbar structure of a high-current low-voltage switch cabinet, including a cabinet 1, a main busbar, a frame circuit breaker 2, a busbar 5, a side-turning bar 12 and an upper branch bar 3. The main busbar and the frame circuit breaker 2 are both arranged in the cabinet 1, the main busbar is arranged in the upper part of the cabinet 1, the frame circuit breaker 2 is arranged in the middle part of the cabinet 1, and the upper branch bar 3, the busbar 5 and the side-turning bar 12 are all arranged in the cabinet 1. The frame circuit breaker 2 includes a first connection port and a second connection port, the first connection port and the second connection port are arranged in the vertical direction, and the first connection port and the second connection port are both vertical connections. The upper branch bar 3 connects the first connection port with the main busbar, and the upper branch bar 3 is extended in the vertical direction. Specifically, the upper branch bar 3 includes a three-phase busbar, and the busbar is extended in the vertical direction. The busbar 5 is L-shaped, the second connection port is connected to one end of the busbar 5, and the side-turning bar 12 connects the other end of the busbar 5 and the main busbar. The upper branch bar 3 is used to realize the connection between the first connection port of the frame circuit breaker 2 and the main busbar, and the busbar 5 and the side flip bar 12 are used to realize the connection between the second connection port and the main busbar.

[0035] By setting the first connection port and the second connection port of the frame circuit breaker 2 as vertical connections, the three-phase busbars of the upper branch 3 can be placed vertically and the L-shaped busbar 5 can be connected to the second connection port and the side-turning busbar 12. Since each phase busbar is provided with multiple layers, the busbars can be evenly distributed, have good heat dissipation, and high current carrying capacity by placing the busbars vertically, thereby solving the problem of serious heating of multi-layer busbars. In addition, the vertical placement of the busbars leaves enough space in the cabinet 1 for other structural layouts. The L-shaped busbar 5 saves the lower branch in the prior art, thereby simplifying the structure, saving the amount of copper busbars, and reducing costs.

[0036] Specifically, since the vertical placement of the busbar leaves enough space in the cabinet 1, the busbar structure of the high-current low-voltage switch cabinet includes nine current transformers 4, and three current transformers 4 are installed corresponding to the three-phase busbars. Three current transformers 4 are provided through the core of each phase busbar. For example, the three current transformers 4 are: 5P20 current transformer, which plays a protective role; 0.2-level current transformer 4 plays a measurement role; 0.2S-level current transformer 4 plays a special measurement, that is, a metering role.

[0037] Since the vertically placed busbar has good heat dissipation, the number of busbar layers per phase is not less than four, and the number of busbar layers can be increased accordingly to improve the current carrying capacity.

[0038] The busbar structure of the high-current low-voltage switch cabinet also includes a fixed row 13 fixed in the cabinet 1 . The fixed row 13 extends in the horizontal direction and has one end connected to the first connection port. The upper branch row 3 is connected to the fixed row 13 .

[0039] Inside the cabinet body 1, a first mounting beam 7 is provided. The first mounting beam 7 is arranged horizontally. The upper busbar 3 is fixed to the first mounting beam 7 through a first wire clamp 9, ensuring the stable and reliable installation of the upper busbar 3. Exemplarily, the first wire clamp 9 is an elastic sheet, which is connected to the first mounting beam 7 through fasteners such as screws, facilitating disassembly and assembly. The elastic sheet is an insulating sheet. Inside the cabinet body 1, at least two first mounting beams 7 are arranged vertically. The upper busbar 3 is fixed to at least two first mounting beams 7. The number of the first wire clamps 9 is the same as that of the first mounting beams 7. The first wire clamps 9 are correspondingly connected to the first mounting beams 7 to fix the upper busbar 3. By increasing the number of the first mounting beams 7 and the first wire clamps 9, the installation stability and reliability of the upper busbar 3 are further improved. Optionally, the first mounting beam 7 is a stainless steel beam with high structural strength. Compared with the cross beam made of aluminized zinc plate material in the prior art, the first mounting beam 7 made of stainless steel material has weak magnetism and can prevent the occurrence of eddy current phenomenon. Specifically, the three-phase busbars are respectively fixed to the first mounting beam 7 through two first wire clamps 9.

[0040] The cabinet body 1 is provided with a second mounting beam 10. The second mounting beam 10 is arranged horizontally. The busbar 5 is fixed to the second mounting beam 10 through a second wire clamp 6, ensuring the reliable and stable installation of the busbar 5. Exemplarily, the second wire clamp 6 is an elastic sheet, and the elastic sheet is connected to the second mounting beam 10 through fasteners such as screws. The busbar 5 is clamped between the second wire clamp 6 and the second mounting beam 10. Optionally, the second mounting beam 10 is a stainless steel beam to improve the structural strength and prevent the occurrence of eddy current phenomenon.

[0041] The side-turning busbar 12 is fixed to the cabinet body 1 through a third wire clamp 11, ensuring the stable installation of the side-turning busbar 12 inside the cabinet body 1, and thus improving the reliability of the low-voltage switchgear. Exemplarily, the third wire clamp 11 is an elastic sheet, and the elastic sheet is connected to the cabinet body 1 through fasteners such as screws. The side-turning busbar 12 is clamped between the third wire clamp 11 and the cabinet body 1. There are multiple third wire clamps 11, thereby increasing the installation reliability between the side-turning busbar 12 and the cabinet body 1. Exemplarily, there are two third wire clamps 11, and the two third wire clamps 11 are arranged at intervals vertically.

[0042] The main busbar is fixedly arranged at the upper part of the cabinet body 1 through a busbar clamp 8. The frame circuit breaker 2 is arranged in the middle or lower part of the cabinet body 1. The first mounting beam 7 is arranged vertically between the main busbar and the frame circuit breaker 2, that is, the upper busbar 3 is arranged between the main busbar and the frame circuit breaker 2, and the structural layout is simple and compact. Exemplarily, the busbar clamp 8 is an insulating elastic sheet such as a plastic elastic sheet. The busbar clamp 8 is connected to the cabinet body 1 through fasteners such as screws. The main busbar is clamped between the busbar clamp 8 and the cabinet body 1.

[0043] In this embodiment, the busbar clamp 8, the first wire clamp 9, the second wire clamp 6 and the third wire clamp 11 have the same structure. Specifically, taking the first wire clamp 9 as an example, the first wire clamp 9 includes two insulating members. The insulating members are provided with grooves, and the two grooves face each other to form a limiting groove. The upper busbar row 3 includes three-phase busbars, and each phase of the busbar is arranged in the limiting groove. Further, there are multiple busbars for each phase, and partitions are provided in the grooves, and adjacent busbars are arranged at intervals through the partitions.

[0044] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A busbar structure for a low-voltage switchgear cabinet with large current, characterized in that Comprising: Cabinet body (1); Main busbar, arranged at the upper part of the cabinet body (1); Frame circuit breaker (2), arranged in the middle of the cabinet body (1), the frame circuit breaker (2) includes a first connection port and a second connection port, and both the first connection port and the second connection port are vertical connection ports; Upper branch row (3), connecting the first connection port and the main busbar, and the upper branch row (3) extends along the vertical direction; Busbar (5), in an L shape, and the second connection port is connected to one end of the busbar (5); Side-turning row (12), connecting the other end of the busbar (5) and the main busbar.

2. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that, A first mounting beam (7) is arranged in the cabinet body (1), the first mounting beam (7) is arranged along the horizontal direction, and the upper branch row (3) is fixed to the first mounting beam (7) through a first wire clamp (9).

3. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 2, characterized in that, At least two of the first mounting beams (7) are arranged vertically in the cabinet body (1), and the upper branch row (3) is fixed to at least two of the first mounting beams (7).

4. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 2, characterized in that, The first mounting beam (7) is arranged vertically between the main busbar and the frame circuit breaker (2).

5. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that The upper branch row (3) includes three-phase busbars, the busbars extend along the vertical direction, and the low-voltage switchgear busbar structure with large current includes nine current transformers (4), and three current transformers (4) are respectively installed corresponding to the three-phase busbars.

6. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that, The main busbar is fixedly arranged at the upper part of the cabinet body (1) through a busbar clamp (8).

7. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that, It further includes a fixed row (13) fixed in the cabinet, the fixed row (13) extends along the horizontal direction, one end is connected to the first connection port, and the upper branch row (3) is connected to the fixed row (13).

8. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that, The upper branch row (3) includes three-phase busbars, the busbars extend along the vertical direction, and the number of layers of each phase of the busbar is not less than four.

9. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 1, characterized in that, The cabinet body (1) is provided with a second mounting beam (10), the second mounting beam (10) is arranged along the horizontal direction, and the busbar (5) is fixed to the second mounting beam (10) through a second wire clamp (6).

10. The busbar structure of the low-voltage switchgear cabinet with large current according to claim 7, characterized in that, The side-turning row (12) is fixed to the cabinet body (1) through a third wire clamp (11).

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