Grounding bar structure of low-voltage outgoing cabinet

Abstract

The utility model relates to a grounding bar structure of a low-voltage outgoing line cabinet. The grounding bar structure comprises at least one lower pile head copper bar and at least one U-shaped grounding bar, the number of the U-shaped grounding bars is equal to that of the lower pile head copper bars, and each U-shaped grounding bar is fixed on one lower pile head copper bar; a gap is arranged between the adjacent lower pile head copper bars, and a gap is also arranged between the adjacent U-shaped grounding bars; a double-spliced cable bar is further fixed to the lower pile head copper bar, the lower pile head copper bar is fixedly installed on a circuit breaker, and the circuit breaker is installed on a circuit breaker installation plate. The double-spliced cable bar is provided with a plurality of cable connecting holes, the lower pile head copper bar is provided with a plurality of cable inlet and outlet holes corresponding to the cable connecting holes, one cable connecting hole and one cable inlet and outlet hole form a group, and each group is arranged in parallel. According to the utility model, the U-shaped grounding bar is adopted, so that grounding is safer, and more space is saved. And a double-spliced cable wiring mode is adopted, so that cable conductors are arranged in parallel, and the lengths of the two cables are ensured to be consistent.

Description

Technical Field

[0001] This utility model relates to a grounding busbar structure, specifically a low-voltage outgoing cabinet grounding busbar structure that is simple in structure, safer in grounding, more space-saving, and ensures that the lengths of the two cables are consistent. Background Technology

[0002] With societal development, electricity demand continues to rise, placing higher demands on the power supply capacity and stability of the power system. In the low-voltage distribution field, low-voltage outgoing switchgear, as a key piece of equipment in power distribution, directly affects the operational quality of the entire power system.

[0003] In many large buildings, industrial plants, and power facilities, the power of electrical equipment is constantly increasing, requiring greater current transmission capacity. Traditional single cables have limitations in current carrying capacity and cannot meet the ever-growing demand for high-current transmission. Double-stranded cables, by splicing two cables together, effectively increase current carrying capacity, becoming an important means of solving the problem of high-current transmission.

[0004] Meanwhile, electrical safety remains paramount in the operation of power systems. Grounding protection, as a key measure to ensure the safety of electrical equipment and personnel, plays a crucial role. It can quickly conduct current to the ground when electrical equipment experiences faults such as leakage, preventing electric shock and equipment damage, and reducing the probability of electrical accidents. Utility Model Content

[0005] To address the aforementioned issues, the main objective of this utility model is to provide a low-voltage outgoing cabinet grounding bar structure that is simple in structure, safer in grounding, more space-saving, and ensures that the lengths of the two cables are consistent.

[0006] This utility model solves the above-mentioned technical problems through the following solution: a grounding busbar structure for a low-voltage outgoing cabinet, the grounding busbar structure for the low-voltage outgoing cabinet includes: at least one lower terminal copper busbar, at least one U-shaped grounding busbar; the number of U-shaped grounding busbars and lower terminal copper busbars are equal, and each U-shaped grounding busbar is fixed on a lower terminal copper busbar.

[0007] When there are multiple lower pile head copper busbars and U-shaped grounding busbars, there is a gap between adjacent lower pile head copper busbars and a gap between adjacent U-shaped grounding busbars.

[0008] A double-section cable busbar is also fixed on the lower terminal copper busbar. The lower terminal copper busbar is fixedly installed on the circuit breaker, and the circuit breaker is installed on the circuit breaker mounting plate.

[0009] In a specific embodiment of this utility model, the spacing between adjacent lower pile head copper busbars is 2-5cm.

[0010] In a specific embodiment of this utility model, the U-shaped grounding busbar is fixed to the copper busbar at the lower pile head by screws.

[0011] In a specific embodiment of this utility model, the double-ended cable busbar is provided with multiple cable connection holes, and the lower terminal copper busbar is provided with multiple cable inlet and outlet holes corresponding to the cable connection holes. Each group consists of one cable connection hole and one cable inlet and outlet hole, and each group is arranged in parallel.

[0012] In a specific embodiment of this utility model, the width of the lower pile head copper busbar is greater than that of the U-shaped grounding busbar.

[0013] In a specific embodiment of this utility model, the lower terminal copper busbar is fixedly installed on the circuit breaker via an insulator.

[0014] In a specific embodiment of this utility model, the lower pile head copper busbar is an "L"-shaped copper busbar, and the U-shaped grounding busbar and the double-pair cable busbar are fixed at the same end of the "L"-shaped copper busbar.

[0015] In a specific embodiment of this utility model, a lower pile head copper busbar is formed by bending a single plate into one piece.

[0016] In a specific embodiment of this utility model, a U-shaped grounding bar is formed by bending a single plate into one piece.

[0017] In a specific embodiment of this utility model, a double-panel cable busbar is formed by bending a single plate into one piece.

[0018] The positive and progressive effects of this utility model are as follows: The grounding busbar structure of the low-voltage outgoing cabinet provided by this utility model adopts a U-shaped grounding busbar, which makes grounding safer and saves more space. The use of a double-cable wiring method, where the cable conductors are arranged parallel to each other, eliminates the cable pitch and ensures that the two cables are of the same length. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0021] The following are the names corresponding to the reference numerals in this utility model:

[0022] Figure 1-2 In the middle: Circuit breaker 1, Circuit breaker mounting plate 2, Lower terminal copper busbar 3, U-shaped grounding busbar 4, Double cable busbar 5, Cable connection hole 501, Cable inlet and outlet hole 301. Detailed Implementation

[0023] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model. Figure 2 for Figure 1 A magnified view of a portion, such as Figure 1-2 As shown: The present invention proposes a grounding busbar structure for a low-voltage outgoing cabinet. The grounding busbar structure includes: at least one lower terminal copper busbar 3 and at least one U-shaped grounding busbar 4; the number of U-shaped grounding busbars 4 and lower terminal copper busbars 3 are equal, and each U-shaped grounding busbar 4 is fixed on a lower terminal copper busbar 3. Figure 1 and 2 The number of copper busbars 3 and U-shaped grounding busbars 4 given in the document is 3.

[0025] When there are multiple lower pile head copper busbars 3 and U-shaped grounding busbars 4, a gap is set between adjacent lower pile head copper busbars 3, and a gap is also set between adjacent U-shaped grounding busbars 4. In specific implementation, the gap range between adjacent lower pile head copper busbars 3 in this utility model is 2-5cm. The width of the lower pile head copper busbar 3 is greater than that of the U-shaped grounding busbar 4, therefore the gap range between adjacent U-shaped grounding busbars 4 is greater than the gap range between adjacent lower pile head copper busbars 3.

[0026] The lower terminal copper busbar 3 of this utility model is also fixed with a double-section cable busbar 5. The lower terminal copper busbar 3 is fixedly installed on the circuit breaker 1. In specific implementation, the lower terminal copper busbar 3 is fixedly installed on the circuit breaker 1 by insulators. The circuit breaker 1 is installed on the circuit breaker mounting plate 2. In specific implementation, the circuit breaker 1 is installed on the circuit breaker mounting plate 2 by bolt connection or snap-fit ​​fixing.

[0027] In the specific implementation of this utility model, the U-shaped grounding busbar 4 is fixed to the lower pile head copper busbar 3 by screw fixing.

[0028] The double-ended cable busbar 5 has multiple cable connection holes 501, and the lower terminal copper busbar 3 has multiple cable inlet / outlet holes 301 corresponding to the cable connection holes. Each group consists of one cable connection hole 501 and one cable inlet / outlet hole 301, and each group is arranged in parallel. The multiple cable connection holes 501 and cable inlet / outlet holes 301 ensure that the cable conductors are arranged in parallel. This arrangement eliminates the cable pitch and ensures that the lengths of the two cables are consistent. The original structure used a single-hole front-to-back cable mounting method.

[0029] In this utility model, the lower pile head copper busbar 3 is an "L"-shaped copper busbar, and the U-shaped grounding busbar 4 and the double-pair cable busbar 5 are fixed at the same end of the "L"-shaped copper busbar.

[0030] A copper busbar 3 for the lower pile head is formed by bending a single plate; a U-shaped grounding busbar 4 is formed by bending a single plate; and a double-section cable busbar 5 is formed by bending a single plate.

[0031] The U-shaped grounding busbar in this invention is better than the Z-shaped grounding busbar for the following reasons:

[0032] Contact area and current transmission: The structure of a U-shaped grounding busbar increases the contact area at the connection points, allowing for more uniform current distribution, improving current transmission efficiency, and reducing the risk of faults caused by poor contact or excessive resistance. A Z-shaped grounding busbar has a relatively smaller contact area, which may result in less uniform current distribution, making it more prone to problems such as localized overheating or current concentration.

[0033] Connection stability: U-shaped grounding busbars, when used with specific connection devices, such as busbar sheaths with grooves, can increase the contact friction of the connection, improve connection stability, and reduce safety risks. Z-shaped grounding busbars have relatively poor connection stability, and the connection points may loosen more easily under long-term use or when subjected to external forces such as vibration.

[0034] Spatial layout and installation convenience: The U-shaped grounding bar has a more regular shape, which makes it easier to install and wire in the spatial layout of low-voltage switchgear and outgoing cabinets. It can effectively utilize space and make the internal structure of the cabinet more compact and neat. The Z-shaped grounding bar has a relatively complex shape, which may require more space for installation and operation, and has higher requirements for the internal layout design of the cabinet.

[0035] The principles of U-shaped grounding busbars and double-layer grounding busbars in low-voltage switchgear outgoing line cabinets are as follows:

[0036] U-shaped grounding busbars increase contact area: The U-shaped structure increases the contact area between the grounding busbar and the connection point, increasing the cross-sectional area S and decreasing the resistance R. This facilitates current flow, allows for a more even distribution of grounding current, reduces contact resistance, and minimizes heat generation. Improved mechanical strength: The U-shaped structure is relatively more stable, able to withstand certain external impacts and vibrations, and is less prone to deformation, ensuring reliable grounding and maintaining good grounding performance over long-term use.

[0037] Double-layer grounding busbars increase current-carrying capacity: Composed of two grounding busbars connected in parallel, this effectively increases the cross-sectional area of ​​the conductor. According to the resistance law, the resistance decreases, and the current-carrying capacity is significantly improved. This can meet the discharge requirements of larger grounding currents, preventing the grounding busbar from overheating or even being damaged due to excessive current. It also improves reliability: The double-layer structure provides redundancy. When one grounding busbar fails or is partially damaged, the other can still bear part of the grounding current, improving the reliability and stability of the entire grounding system and reducing the risk of electrical accidents caused by grounding faults.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A grounding busbar structure for a low-voltage outgoing switchgear, characterized in that: The low-voltage outgoing cabinet grounding busbar structure includes: at least one lower terminal copper busbar and at least one U-shaped grounding busbar; the number of U-shaped grounding busbars and lower terminal copper busbars are equal, and each U-shaped grounding busbar is fixed on a lower terminal copper busbar; When there are multiple lower pile head copper busbars and U-shaped grounding busbars, there is a gap between adjacent lower pile head copper busbars and a gap between adjacent U-shaped grounding busbars. A double-section cable busbar is also fixed on the lower terminal copper busbar. The lower terminal copper busbar is fixedly installed on the circuit breaker, and the circuit breaker is installed on the circuit breaker mounting plate.

2. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The spacing between adjacent lower pile head copper busbars is 2-5cm.

3. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The U-shaped grounding busbar is fixed to the copper busbar at the lower pile head using screws.

4. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The double-ended cable busbar has multiple cable connection holes, and the lower terminal copper busbar has multiple cable inlet and outlet holes corresponding to the cable connection holes. Each group consists of one cable connection hole and one cable inlet and outlet hole, and each group is arranged in parallel.

5. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The width of the copper busbar at the bottom of the pile is greater than that of the U-shaped grounding busbar.

6. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The lower terminal copper busbar is fixedly installed on the circuit breaker via insulators.

7. The grounding busbar structure of the low-voltage outgoing switchgear according to claim 1, characterized in that: The lower pile head copper busbar is an "L" shaped copper busbar, and the U-shaped grounding busbar and the double-section cable busbar are fixed at the same end of the "L" shaped copper busbar.

8. The grounding busbar structure of the low-voltage outgoing switchgear according to any one of claims 1-7, characterized in that: A single copper busbar for the lower pile head is formed by bending a single plate.

9. The grounding busbar structure of the low-voltage outgoing switchgear according to any one of claims 1-7, characterized in that: A U-shaped grounding busbar is formed by bending a single plate into one piece.

10. The grounding busbar structure of the low-voltage outgoing switchgear according to any one of claims 1-7, characterized in that: A double-panel cable busbar is formed by bending a single plate into one piece.

Images