A method for connecting copper bars in an electrical cabinet

Abstract

The application discloses a copper bar wiring method in an electrical cabinet, characterized in that: a general wiring terminal row is used to transmit electric energy in various electrical cabinets, and the size of the channel section for arranging the current-carrying copper bar in each wiring slot chamber on the wiring terminal row can be adjusted and changed in direct proportion to the size of the maximum conduction current required by the corresponding installed electrical cabinet.

Description

Technical Field

[0001] This invention belongs to the field of electrical cabinets, and specifically relates to a method for wiring copper busbars inside an electrical cabinet. Background Technology

[0002] Electrical cabinets are important power transmission and distribution equipment used to transmit and control the switching of electrical energy. Current is transmitted through copper busbars inside the electrical cabinet.

[0003] However, existing electrical cabinets use terminal blocks for copper busbar wiring for connection and current conduction. Furthermore, different electrical cabinets often have different maximum current carrying capacities, requiring the selection of different terminal block models. This often forces electrical cabinet manufacturers to purchase or order multiple different models of terminal blocks, consuming inventory space and increasing inventory costs. Moreover, the different models and dimensions of terminal blocks often vary, further increasing the workload and cost in the design and installation stages.

[0004] Based on this, we consider designing a more flexible wiring method for copper busbars inside electrical cabinets that reduces the workload and cost of design and installation. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a more flexible method for wiring copper busbars in electrical cabinets that reduces the workload and cost of design and installation.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] The method for wiring copper busbars in electrical cabinets is characterized by the use of universal terminal blocks to transmit electrical energy in various types of electrical cabinets. The cross-sectional size of the channel for laying the current-conducting copper busbar in each wiring slot of the terminal block can be adjusted proportionally according to the maximum conduction current required by the corresponding electrical cabinet.

[0008] Compared with the prior art, the copper busbar wiring method in the electrical cabinet of the present invention has the following advantages:

[0009] 1. The cross-sectional size of the channel for mounting the current-conducting copper busbar in each wiring slot of the terminal block can be adjusted proportionally according to the maximum conduction current required by the corresponding electrical cabinet. Therefore, it is easy to accommodate current-conducting copper busbars of different cross-sectional areas by varying the slot width and / or slot depth. The conduction current of different current-conducting copper busbars depends on the cross-sectional area of ​​the copper busbar. Therefore, the technical solution of this invention can easily realize current conversion (changing the maximum conduction current), changing the situation where existing terminal blocks are often only suitable for a fixed maximum conduction current. The current application range is wider, and the practicality and flexibility of use are improved.

[0010] 2. In this technical solution, universal terminal blocks are used to transmit electrical energy in various electrical cabinets. This allows for the adaptation of copper busbars with different cross-sectional areas, reducing the manufacturing, design, and installation costs required for different molds, equipment, or tooling for manufacturing different terminal block housings. Furthermore, the reduced cost also helps to lower the final selling price of the product, thereby reducing the user's operating costs. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the terminal block structure used in the copper busbar wiring method inside the electrical cabinet of the present invention.

[0012] Figure 2 for Figure 1 Exploded view of the terminal block

[0013] Figure 3 for Figure 1 Schematic diagram of the structure of the current-conducting copper busbar and insulator in the terminal block.

[0014] Figure 4 for Figure 1 Schematic diagram of the structure when the slot width of the terminal block's wiring slot changes.

[0015] The diagram is marked as follows:

[0016] A wiring trough room

[0017] 10. Current-conducting copper busbar: 101. Terminal bolt, 102. Terminal nut

[0018] 20 Base plate: 201 Lower connecting part

[0019] 30 Cover plate: 301 upper connecting part

[0020] 40 partition: 401 upper convex part, 402 lower convex part

[0021] 50 connecting sleeve

[0022] 60 strip

[0023] 70 insulator Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings.

[0025] The wiring method for copper busbars in electrical cabinets uses universal terminal blocks to transmit electrical energy in various types of electrical cabinets. The cross-sectional size of the channel for laying the current-conducting copper busbar in each wiring slot of the terminal block can be adjusted proportionally according to the maximum conduction current required by the corresponding electrical cabinet.

[0026] Example 1 (Preferred Example, such as...) Figures 1 to 4 (as shown)

[0027] The partition between two adjacent wiring compartments is a detachable fixed installation structure, specifically as follows:

[0028] A terminal block includes at least two terminal slots A arranged side by side. Each terminal slot A is insulated and has an installation space that runs through the length of the slot. A vertical insulator 70 is fixed to the bottom of the slot in the installation space. A current-conducting copper busbar 10 is fixedly connected to the upper end of the insulator 70 through a connector. The length of the current-conducting copper busbar 10 extends along the length of the terminal slot A, and both ends of the current-conducting copper busbar 10 are provided with wiring holes for electrical connection with conductors.

[0029] The partition 40 between two adjacent wiring troughs A is a detachable fixed installation structure, and the space width of the wiring trough A can be changed by adjusting the partition 40.

[0030] Because the partition between two adjacent wiring slots is removable or adjustable, the width of the wiring slot can be easily changed by adjusting the partition. After adjusting the width of the wiring slot, the current-conducting copper busbar can be replaced and used. The overcurrent of different current-conducting copper busbars depends on the cross-sectional area of ​​the copper busbar. Therefore, the terminal block of the present invention can easily realize current conversion (change the maximum conduction current), changing the situation where existing terminal blocks are often only applicable to a fixed value of maximum conduction current. The current application range is larger, the practicality is improved, and the use cost of terminal blocks with larger conduction circuit values ​​is reduced.

[0031] The terminal block includes a housing, which comprises a base plate 20, a cover plate 30, and a detachable locking structure; the base plate 20, the cover plate 30, and the partition plate 40 are all made of insulating material.

[0032] The base plate 20 is generally in the shape of a strip plate. Multiple insertion holes are spaced along the length of the surface of the base plate 20. Each insertion hole can be filled and fixed by the bottom protrusion of a partition plate 40. A wiring groove chamber A can be formed between two adjacent partition plates 40 and the base plate 20.

[0033] The cover plate 30 is fixedly connected to the top of each partition plate 40 by the detachable locking structure, so that each wiring slot A is isolated from each other.

[0034] The advantages of the above-described shell structure are:

[0035] The base plate 20, cover plate 30, and partition plate 40 that make up the shell are all plate-shaped structures, which can be laid flat and do not take up space, saving the area and space required for production and storage. The various parts of the shell in this technical solution can be prefabricated and then flexibly combined into parts packages according to different customer needs. Customers can assemble them themselves according to their on-site needs, which is more flexible and does not occupy finished product inventory.

[0036] Meanwhile, the shell structure of this technical solution is easy to process into base plates 20 and cover plates 30 of different lengths according to actual needs, forming a series or modular design. It can be expanded into the following forms according to different needs: 3 slots (slot refers to wiring slot A), 6 slots, 9 slots, 12 slots arranged side by side, etc., to better meet different needs, with high practicality and good cost performance.

[0037] The terminal block has an upper protrusion 401 on the top of each partition 40. The cover plate 30 is provided with a plurality of insertion holes along the length direction for the upper protrusion 401 to be filled and inserted. The plurality of insertion holes and the plurality of insertion holes on the base plate 20 are aligned in the height direction.

[0038] With the above structure, the partition 40 not only isolates the two adjacent wiring slots A, but also provides some support for the cover plate 30 (the cover plate 30 can also fix and limit the partition 40), which helps to achieve pre-assembly connection and positioning before fastening through the detachable locking structure.

[0039] Among them, the bottom protrusion on the partition 40 is located at the middle of the bottom length direction of the partition 40; the length of the partition 40 is greater than the width of the base plate 20, so that both ends of the partition 40 in the length direction have exposed portions that project out of the outside of the base plate 20, and the lower end of the exposed portion is formed with a downward protrusion 402 for abutting against the end face of the base plate 20 in the width direction and the downward protrusion height is lower than the thickness of the base plate 20.

[0040] The aforementioned exposed portion increases the surface area of ​​the partition 40, thereby increasing the isolation area between two adjacent wiring slots A and providing better electrical isolation. Furthermore, the downward protrusion 402 on the partition 40 provides better positioning and stabilization with the base plate 20 in the width direction, improving impact resistance in that direction and enhancing structural reliability.

[0041] In practice, the width of the cover plate 30 is equal to (matches) the length of the partition plate 40. In this way, the cover plate 30 can effectively cover the installation space inside the wiring trough chamber A, thus providing a protective function.

[0042] The detachable locking structure includes an upper connecting part 301 and a lower connecting part 201;

[0043] The cover plate 30 has an upper connecting portion 301 that extends outward and protrudes outward along the length direction of the cover plate 30 at both ends in the longitudinal direction.

[0044] The base plate 20 has a lower connecting portion 201 that extends outward and protrudes outward along the length direction of the base plate 20 at both ends in the longitudinal direction.

[0045] The upper connecting part 301 and the lower connecting part 201 are provided with mounting holes facing each other, and are fastened together by a connecting sleeve 50 abutting between the upper connecting part 301 and the lower connecting part 201 and a bolt passing through the mounting hole.

[0046] The structure using the upper connecting part 301, the lower connecting part 201, the connecting sleeve 50, and bolts to achieve a fastening connection is simpler and easier to assemble. At the same time, the upper connecting part 301, the lower connecting part 201, and the connecting sleeve 50, located at the ends, can provide shielding and protection, improve the reliability of the structure, and also make the overall appearance of the terminal block more concise and aesthetically pleasing.

[0047] At least two mounting holes are provided at intervals in the width direction of the cover plate 30 and the base plate 20.

[0048] With the above structure, not only can the connection strength between the cover plate 30 and the base be enhanced, but the terminal block can also be installed and fixed through the mounting holes on the base plate 20.

[0049] A clamping bolt 101 is inserted into the wiring hole of the current guide copper busbar 10. The lower section of the bolt 101 passes through the wiring hole and is connected to a wiring nut 102 by thread.

[0050] Unlike existing terminal blocks or terminal outlets that commonly use screws to tighten the terminals, this technical solution uses a different approach. Because the current-carrying copper busbar 10 is installed via a vertical insulator 70, its end is suspended. By using the aforementioned connection bolt 101 and connection nut 102 at the connection hole, a back-to-back connection can be achieved at the connection hole, allowing two wires to be connected to one terminal. This not only increases wiring efficiency but also significantly increases the number of wires that can be connected to a single terminal. This allows the terminal block to better meet wiring requirements while simultaneously reducing its overall size and cost by half, resulting in greater economic benefits and practical value.

[0051] It is estimated that, under the same conditions (same maximum conducting current), the terminal block using this technical solution can save 5 / 6 of the cost compared to the Weidmüller terminal block (model: WFF185), and 1 / 4 of the cost compared to the domestic Supu terminal block (model: RD500-01).

[0052] The detachable locking structure also includes a pressure strip 60 made of insulating material, wherein the pressure strip 60 itself is a straight strip structure and has a rectangular cross-section;

[0053] Each partition 40 is provided with a rectangular hole through which the pressure strip 60 is filled; the two ends of the pressure strip 60 in the length direction have protruding sections that protrude outside each partition 40. The lower connecting part 201 of the base plate 20 is provided with a connecting hole on the protruding section, and the connection is fastened by a connecting sleeve 50 abutting between the protruding section and the lower connecting part 201 and a bolt passing through the connecting hole.

[0054] After the pressure strip 60 is set, it can cooperate with the rectangular hole on the partition 40 to limit the partition 40 in the front-back direction and the up-down direction, improve the stability of the partition 40 and ensure the reliability of electrical isolation.

[0055] The pressure strip 60 is positioned above the middle of the length of the current guide copper busbar 10.

[0056] In this way, not only can the pressure strip 60 play a limiting role, but it is also located in the space above the current-conducting copper busbar 10 in each wiring slot A. Therefore, it can effectively prevent air ionization in this space, play a certain role in arc prevention and arc extinguishing, and improve the safety of use.

[0057] The insulating material used to manufacture the cover plate 30, the base plate 20 and the partition plate 40 is one or at least two of 3240 epoxy board, SMC insulating board or FR-4 epoxy board.

[0058] Example of application of Embodiment 1: For instance, when there is a need to conduct a larger current, the partition between two adjacent wiring slots can be removed, and the two cross-sectional area current-carrying copper busbars in the original two wiring slots can be replaced with a single current-carrying copper busbar with a larger cross-sectional area. This larger cross-sectional area current-carrying copper busbar occupies two wiring slots, thus achieving current conversion. The current-carrying copper busbar can be thickened or two compartments can be combined into one phase to widen the busbar; this allows the maximum current carrying capacity of a single wiring slot to be 450A, and when two wiring slots are combined, a current-carrying copper busbar with a maximum current carrying capacity of 900A can be selected.

[0059] Example 2, not shown in the figure:

[0060] The difference between this embodiment and the two embodiments above is that the partition 40 between two adjacent wiring slot chambers A is an adjustable fixed installation structure arranged in a parallel direction, specifically as follows:

[0061] At least two wiring slots A arranged side by side are provided with guide rails extending in the side-by-side direction at the bottom of the slots. The lower end of the partition 40 has a mating part that can be slidably inserted into or sleeved on the guide rail. In this way, the partition 40 can be slidably adjusted along the guide rail. After adjustment, the partition 40 can be fixedly installed and connected to the wiring slot A by screws engaging with the mounting holes (on the mounting lugs) provided on the partition 40.

[0062] Example 3, not shown in the figure:

[0063] The difference between this embodiment and the two embodiments above is that the partition 40 between two adjacent wiring slot chambers A is an adjustable fixed installation structure arranged in a parallel direction, specifically as follows:

[0064] The bottom of at least two wiring troughs A arranged side by side is provided with multiple mounting holes spaced apart in the side-by-side direction. Each mounting hole represents a different mounting position of the partition 40 (corresponding to wiring troughs A of different widths), so that different mounting hole positions can be selected to fix the partition 40.

[0065] Example 4 (Example where the depth of the wiring trough chamber is variable):

[0066] The difference between this embodiment and the three embodiments described above is that the depth of the wiring trench chamber is variable.

[0067] The specific structure is as follows: Each partition has a stepped upper protrusion that gradually decreases in width from bottom to top. This allows for the preparation of cover plates that can be used with single-stage steps of different widths. Each cover plate has an insertion hole for inserting only into that specific step. Thus, by using cover plates with different insertion holes, the lifting and lowering of the cover plate on the partition can be adjusted, thereby changing the depth of the wiring slot chamber.

[0068] The above are merely preferred embodiments of the present invention. It should be noted that any modifications and improvements made by those skilled in the art without departing from the present technical solution should also be considered to fall within the scope of protection claimed in this claim.

Claims

1. A method for wiring copper busbars inside an electrical cabinet, characterized in that: In various electrical cabinets, universal terminal blocks are used to transmit electrical energy. The cross-sectional size of the channel for laying the current-conducting copper busbar in each terminal block can be adjusted proportionally according to the maximum conduction current required by the corresponding electrical cabinet. The terminal block includes at least two terminal slots arranged side by side. Each terminal slot is insulated and has an installation space extending along the length of the slot. A vertical insulator is fixed to the bottom of the slot in the installation space. A current-conducting copper busbar is fixedly connected to the upper end of the insulator via a connector. The length of the current-conducting copper busbar extends along the length of the terminal slot, and both ends of the current-conducting copper busbar are provided with wiring holes for electrical connection with conductors. The width and / or depth of each terminal slot is variable. The partition between two adjacent wiring trays is a detachable fixed installation structure, and the width of the wiring tray can be changed by adjusting the partition; A clamping bolt for the connector is inserted into the wiring hole of the current guide copper busbar. The lower section of the bolt passes through the wiring hole and is connected to a wiring nut by thread, so that the end of the current guide copper busbar can be connected to the top and bottom at the wiring hole, and two wires can be connected to one terminal.

2. The wiring method for copper busbars inside an electrical cabinet according to claim 1, characterized in that: The device includes a housing, which comprises a base plate, a cover plate, and a removable locking structure; the base plate, cover plate, and partition plate are all made of insulating material. The base plate is generally in the shape of a strip-shaped flat plate. Multiple insertion holes are spaced along the length of the surface of the base plate. Each insertion hole can be filled and fixed by the bottom protrusion of a partition plate. A wiring groove can be formed between two adjacent partition plates and the base plate. The cover plate is fixedly connected to the top of each partition by the detachable locking structure, so that each wiring slot is isolated from each other.

3. The wiring method for copper busbars inside an electrical cabinet according to claim 2, characterized in that: Each of the partitions has an upward protrusion at its top, and the cover plate is provided with a plurality of insertion holes spaced along the length direction for the upward protrusion to be filled and inserted. The plurality of insertion holes and the plurality of insertion holes on the base plate are aligned one by one in the height direction. The upward protrusion of each partition is a step-shaped protrusion with a gradually decreasing width from bottom to top.

4. The wiring method for copper busbars inside an electrical cabinet according to claim 2, characterized in that: The detachable locking structure also includes a pressure strip made of insulating material. The pressure strip itself is a straight strip with a rectangular cross-section. Each partition is provided with a rectangular hole through which the pressure strip can be filled. The pressure strip is positioned above the middle of the length of the current-guiding copper busbar to avoid air ionization in the upper space of the current-guiding copper busbar in the wiring trough, thereby playing a role in arc prevention and arc extinguishing.

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