Low-voltage feeder cabinet

Abstract

The utility model belongs to the technical field of low-voltage electrical equipment, and discloses a low-voltage feeder cabinet. The low-voltage feeder cabinet comprises a cabinet body, a side-turning busbar and at least two frame circuit breakers. At least two cable holes are formed in the rear wall of the cabinet body at intervals in a staggered mode. The side turning busbar is arranged in the cabinet body; the at least two frame circuit breakers are arranged in the cabinet body at intervals along the height direction of the cabinet body; each frame circuit breaker is correspondingly provided with an upper contact connecting busbar and a lower contact connecting busbar; in the at least two frame circuit breakers, the first end of each upper contact connection busbar is connected with the corresponding frame circuit breaker, the second end of each upper contact connection busbar is connected with the side turning busbar, and the first end of each lower contact connection busbar is connected with the corresponding frame circuit breaker; and the second ends of the lower contact connecting busbars are in one-to-one correspondence with the cable holes, are opposite to the cable holes, and are configured to be connected with corresponding cables. According to the utility model, the connecting ends of the lower contacts connected with the busbar do not interfere with each other, so that the cable can be conveniently hung and connected, and the heat dissipation performance is good.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical equipment technology, and in particular to a low-voltage feeder cabinet. Background Technology

[0002] Low-voltage switchgear is suitable for power plants, petroleum, chemical, metallurgy, textile, high-rise building and other industries for power transmission, distribution and power conversion.

[0003] In low-voltage switchgear, the feeder cabinet typically houses two frame circuit breakers, spaced apart. Each frame circuit breaker's outgoing terminals are connected to cables via connecting busbars. Specifically, the cables are introduced from the bottom of the cabinet, and the connection ends of the two connecting busbars are staggered along the front-to-back direction of the cabinet. When there are three or more frame circuit breakers, the limited space at the rear of the cabinet makes it extremely inconvenient to bring the cables up from the bottom using this method, and it may also lead to interference between the connecting busbars.

[0004] Therefore, there is an urgent need for a low-voltage feeder cabinet to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide a low-voltage feeder cabinet in which the connection ends of each lower contact busbar do not interfere with each other, making it convenient to hang cables and providing good heat dissipation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A low-voltage feeder cabinet includes:

[0008] The cabinet has at least two cable holes spaced apart and staggered on its rear wall for cables to pass through.

[0009] A side-flip busbar is installed inside the cabinet.

[0010] At least two frame circuit breakers are spaced apart within the cabinet along its height. Each frame circuit breaker is provided with an upper contact busbar and a lower contact busbar. In the at least two frame circuit breakers, the first end of each upper contact busbar is connected to the corresponding frame circuit breaker, and the second end of each upper contact busbar is connected to the side-flipping busbar. The first end of each lower contact busbar is connected to the corresponding frame circuit breaker. The second end of each lower contact busbar corresponds one-to-one with the cable hole and is configured to connect to the corresponding cable.

[0011] In some possible implementations, the frame circuit breaker is provided in three parts, and the lower contact connecting busbars corresponding to the three frame circuit breakers are respectively a first connecting busbar, a second connecting busbar and a third connecting busbar. The first connecting busbar and the second connecting busbar are both Z-shaped structures, and the third connecting busbar is a straight structure.

[0012] In some possible implementations, the second end of each of the upper contact busbars extends to the cable hole.

[0013] In some possible implementations, each of the lower contact connecting busbars is provided with a first busbar clamp and a crossbeam. The first busbar clamp can clamp the lower contact connecting busbar, the first busbar clamp is fixed to the crossbeam, and both ends of the crossbeam are fixed to the cabinet.

[0014] In some possible implementations, the low-voltage feeder cabinet further includes a fire zero-sequence current transformer, and each of the lower contact connecting busbars includes three conductive elements, each of which is connected to the fire zero-sequence current transformer.

[0015] In some possible implementations, the low-voltage feeder cabinet further includes a triangular bracket, both ends of which are fixed to the cabinet body, and the fire zero-sequence current transformer is fixed to the triangular bracket.

[0016] In some possible implementations, the first end of each of the lower contact busbars is connected to the corresponding frame circuit breaker via a terminal block, and the terminal block is oriented at 90 degrees.

[0017] In some possible implementations, at least two of the frame circuit breakers are located on one side of the cabinet and on the same side, while the side-flip busbar is located on the other side of the cabinet.

[0018] In some possible implementations, the second end of each of the upper contact busbars is connected to the side-flipping busbar via a horizontal busbar.

[0019] In some possible implementations, the low-voltage feeder cabinet further includes a second busbar clamp that can clamp the side-flipping busbar and is fixed to the cabinet body.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a low-voltage feeder cabinet, including a cabinet body, a side-flip busbar, and at least two frame circuit breakers. Cable holes are located on the rear wall of the cabinet for easy cable connection. At least two cable holes are spaced apart and staggered, and the second end of the lower contact busbar corresponds one-to-one with each cable hole, ensuring that the connection ends of each lower contact busbar are spaced apart and staggered, preventing interference and making cable connection easier for the user. Furthermore, the spaced apart and staggered connection ends of each lower contact busbar improve heat dissipation. Attached Figure Description

[0022] Figure 1 This is a front view of the low-voltage feeder cabinet provided by this utility model;

[0023] Figure 2 This is a rear view of the low-voltage feeder cabinet provided by this utility model;

[0024] Figure 3 This is a side view of the low-voltage feeder cabinet provided by this utility model;

[0025] Figure 4 This is a top view of the first connecting busbar involved in this utility model;

[0026] Figure 5 This is a top view of the second connecting busbar involved in this utility model;

[0027] Figure 6 This is a top view of the third connecting busbar involved in this utility model.

[0028] In the picture:

[0029] 1. Cabinet; 2. Side-flipping busbar; 20. Main busbar; 3. Frame circuit breaker; 4. Upper contact connecting busbar; 5. Lower contact connecting busbar; 51. Conductive component; 6. First busbar clamp; 7. Crossbeam; 8. Fire zero-sequence current transformer; 9. Triangular bracket; 10. Frame; 11. Horizontal busbar; 12. Second busbar clamp. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0034] like Figures 1 to 6As shown, this utility model provides a low-voltage feeder cabinet, including a cabinet body 1, a side-flipping busbar 2, and at least two frame circuit breakers 3. The rear wall of the cabinet body 1 is provided with at least two cable holes spaced apart and staggered for cables to pass through. It should be noted that "at least two cable holes spaced apart and staggered" means that the projections of at least two cable holes on the horizontal plane do not completely overlap, and their projections on the vertical plane do not completely overlap either. A side-flipping busbar 2 is installed inside the cabinet 1 and connected to the main busbar 20 inside the cabinet 1. At least two frame circuit breakers 3 are spaced apart along the height of the cabinet 1 inside the cabinet 1. In this embodiment, the cabinet 1 has at least two circuit breaker compartments, and the frame circuit breakers 3 are located in the circuit breaker compartments, with each frame circuit breaker 3 corresponding to a circuit breaker compartment. Each frame circuit breaker 3 is correspondingly provided with an upper contact connecting busbar 4 and a lower contact connecting busbar 5, and the lower contact connecting busbar 5 has three phases: A, B, and C. In the at least two frame circuit breakers 3, the first end of each upper contact connecting busbar 4 is connected to the corresponding frame circuit breaker 3, and the second end of each upper contact connecting busbar 4 is connected to the side-flipping busbar 2. The first end of each lower contact connecting busbar 5 is connected to the corresponding frame circuit breaker 3. The second end of the lower contact connecting busbar 5 corresponds to and faces the cable hole, and is configured to connect to the corresponding cable. The cable hole is located on the rear wall of the cabinet 1 for easy cable hanging by the user. At least two cable holes are spaced apart and staggered, and the second end of the lower contact busbar 5 corresponds one-to-one with and is directly opposite the cable hole. This ensures that the connecting ends of each lower contact busbar 5 are spaced apart and staggered, preventing interference between them and making it easier for users to connect cables. Furthermore, the spaced apart and staggered arrangement of the connecting ends of each lower contact busbar 5 improves heat dissipation.

[0035] Optionally, at least two frame circuit breakers 3 are located on one side of the cabinet 1 and on the same side, while the side-flip busbar 2 is located on the other side of the cabinet 1. This arrangement facilitates the connection of the upper contact connecting busbar 4 and the side-flip busbar 2. Optionally, in this embodiment, the second end of each upper contact connecting busbar 4 is connected to the side-flip busbar 2 via a horizontal busbar 11, which avoids interference between the side-flip busbar 2 and the lower contact connecting busbar 5 and facilitates heat dissipation.

[0036] Optionally, three frame circuit breakers 3 are provided, and the lower contact connecting busbars 5 corresponding to the three frame circuit breakers 3 are respectively the first connecting busbar, the second connecting busbar, and the third connecting busbar. The first and second connecting busbars are both Z-shaped structures, and the third connecting busbar is a straight structure. Specifically, the projections of the first and second connecting busbars on the horizontal plane are symmetrically distributed. With this arrangement, the connection ends of each lower contact connecting busbar 5 do not interfere with each other, the structure is simple, easy to process and manufacture, and the heat dissipation effect is good. In this embodiment, as... Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the first connecting busbar, the second connecting busbar, and the third connecting busbar are arranged sequentially from top to bottom. The second end of the first connecting busbar is located near the right side of the cabinet 1, the second end of the second connecting busbar is located near the left side of the cabinet 1, and the second end of the third connecting busbar is located in the middle of the cabinet 1. To make it easier for users to hang cables, optionally, the second end of each upper contact connecting busbar 4 extends to the cable hole.

[0037] Optionally, in this embodiment, each lower contact connecting busbar 5 is provided with a first busbar clamp 6 and a crossbeam 7. The first busbar clamp 6 can clamp the lower contact connecting busbar 5, and the first busbar clamp 6 is fixed to the crossbeam 7. Both ends of the crossbeam 7 are fixed to the cabinet 1. By setting the first busbar clamp 6, the lower contact connecting busbar 5 is fixed, preventing the lower contact connecting busbar 5 from shaking. By setting the crossbeam 7, the first busbar clamp 6 is easily fixed, and the cabinet 1 is also reinforced.

[0038] Optionally, in this embodiment, the low-voltage feeder cabinet further includes a fire zero-sequence current transformer 8. Each lower contact connecting busbar 5 includes three conductive elements 51, and each conductive element 51 is connected to the fire zero-sequence current transformer 8. By setting the fire zero-sequence current transformer 8 to detect changes in the zero-sequence current in the detection circuit, fire early warning signals can be detected in a timely manner, ensuring the safety of personnel and equipment. To achieve reliable fixing of the fire zero-sequence current transformer 8, optionally, in this embodiment, the low-voltage feeder cabinet further includes a triangular bracket 9. Both ends of the triangular bracket 9 are fixed to the cabinet body 1, and the fire zero-sequence current transformer 8 is fixed to the triangular bracket 9. In this embodiment, the low-voltage feeder cabinet further includes a frame 10. The frame 10 is fixed inside the cabinet body 1, and both ends of the crossbeam 7 are fixed to the frame 10. Both ends of the triangular bracket 9 are fixed to the frame 10, which facilitates the fixing of the crossbeam 7 and the triangular bracket 9 and improves the structural strength of the cabinet body 1.

[0039] Optionally, in this embodiment, the first end of each lower contact busbar 5 is connected to the corresponding frame circuit breaker 3 via a terminal block, and the terminal block is oriented at 90 degrees. Specifically, the wires of the frame circuit breaker 3 are connected to the horizontal part of the terminal block, and the first end of the lower contact busbar 5 is connected to the vertical part of the terminal block. This arrangement facilitates wiring.

[0040] Optionally, in this embodiment, the low-voltage feeder cabinet further includes a second busbar clamp 12, which clamps the side-tilting busbar 2 and is fixed to the cabinet body 1. By setting the second busbar clamp 12, the side-tilting busbar 2 is fixed, preventing it from shaking.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A low-voltage feeder cabinet, characterized in that, include: The cabinet (1) has at least two cable holes spaced apart and staggered on its rear wall for cables to pass through; Side-flipping busbar (2) is installed inside the cabinet (1); At least two frame circuit breakers (3) are spaced apart in the cabinet (1) along the height direction of the cabinet (1); each frame circuit breaker (3) is provided with an upper contact busbar (4) and a lower contact busbar (5); in the at least two frame circuit breakers (3), the first end of each upper contact busbar (4) is connected to the corresponding frame circuit breaker (3), the second end of each upper contact busbar (4) is connected to the side-flipping busbar (2), and the first end of each lower contact busbar (5) is connected to the corresponding frame circuit breaker (3); the second end of the lower contact busbar (5) corresponds one-to-one with the cable hole and is arranged facing each other, and is configured to be connected to the corresponding cable.

2. The low-voltage feeder cabinet according to claim 1, characterized in that, The frame circuit breaker (3) is provided in three parts. The lower contact connecting busbars (5) corresponding to the three frame circuit breakers (3) are respectively the first connecting busbar, the second connecting busbar and the third connecting busbar. The first connecting busbar and the second connecting busbar are both Z-shaped structures, and the third connecting busbar is a straight structure.

3. The low-voltage feeder cabinet according to claim 1, characterized in that, The second end of each of the upper contact busbars (4) extends to the cable hole.

4. The low-voltage feeder cabinet according to claim 1, characterized in that, Each of the lower contact busbars (5) is provided with a first busbar clamp (6) and a crossbeam (7). The first busbar clamp (6) can clamp the lower contact busbars (5). The first busbar clamp (6) is fixed to the crossbeam (7). Both ends of the crossbeam (7) are fixed to the cabinet (1).

5. The low-voltage feeder cabinet according to claim 1, characterized in that, The low-voltage feeder cabinet also includes a fire zero-sequence transformer (8), and each of the lower contact connecting busbars (5) includes three conductive elements (51), and each of the conductive elements (51) is connected to the fire zero-sequence transformer (8).

6. The low-voltage feeder cabinet according to claim 5, characterized in that, The low-voltage feeder cabinet also includes a triangular bracket (9), both ends of which are fixed to the cabinet body (1), and the fire zero-sequence current transformer (8) is fixed to the triangular bracket (9).

7. The low-voltage feeder cabinet according to claim 1, characterized in that, The first end of each of the lower contact busbars (5) is connected to the corresponding frame circuit breaker (3) via a terminal block, and the terminal block is oriented at 90 degrees.

8. The low-voltage feeder cabinet according to any one of claims 1-7, characterized in that, At least two of the frame circuit breakers (3) are located on one side of the cabinet (1) and on the same side, while the side-flip busbar (2) is located on the other side of the cabinet (1).

9. The low-voltage feeder cabinet according to claim 8, characterized in that, The second end of each of the upper contact busbars (4) is connected to the side-flipping busbar (2) via a horizontal busbar (11).

10. The low-voltage feeder cabinet according to any one of claims 1-7, characterized in that, The low-voltage feeder cabinet also includes a second busbar clamp (12), which can clamp the side-flipping busbar (2) and is fixed to the cabinet body (1).

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