Low voltage lead structure and transformer

Abstract

The utility model relates to transformer technical field, concretely relates to a low pressure lead structure and transformer, including ay connection copper bar, bz connection copper bar and cx connection copper bar, ay connection copper bar, bz connection copper bar and cx connection copper bar all are same direction setting, bz connection copper bar and ay connection copper bar all are located the below of cx connection copper bar, through optimizing lead structure, will cx connection copper bar respectively with ay connection copper bar and bz connection copper bar stratified arrangement, reduced the interference between connection copper bar, is favorable to the promotion transformer's electrical performance and stability, has improved low pressure lead heat dissipation condition, reduces temperature rise, the distance of low voltage side coil to oil tank reduces, greatly reduces the oil tank and transformer oil's usage, reduces manufacturing cost. Also solved the problem of the local heating of the outer wall of the oil tank, reduces the overall loss of the transformer.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a low-voltage lead structure and a transformer. Background Technology

[0002] In a conventional low-voltage delta connection transformer, all connecting copper busbars are located on the same horizontal plane. The connecting copper busbars interact with each other and bear huge electrodynamic forces. At the same time, the traditional U-shaped bending structure is difficult to process. In order to ensure the insulation distance, the distance from the low-voltage side coil to the oil tank is increased, which increases the amount of oil tank and transformer oil used. In addition, there is the problem of local heating on the outer wall of the oil tank.

[0003] In summary, optimizing the low-voltage lead layout, reducing interference between connecting copper busbars, improving the transformer's electrical performance and mechanical strength, and enhancing its short-circuit withstand capability, without increasing material costs, and optimizing material usage to reduce manufacturing costs, have become pressing technical problems for those skilled in the art. Utility Model Content

[0004] The purpose of this invention is to provide a low-voltage lead structure and transformer to solve the technical problem of unreasonable lead arrangement in existing transformers.

[0005] The solution of this utility model to the above-mentioned technical problems is as follows: A low-voltage lead structure includes an ay connecting copper busbar, a bz connecting copper busbar, and a cx connecting copper busbar, wherein the ay connecting copper busbar, bz connecting copper busbar, and cx connecting copper busbar are all arranged in the same direction, and the bz connecting copper busbar and ay connecting copper busbar are both located below the cx connecting copper busbar.

[0006] Further specifying, the bottom of the CX connecting copper busbar is provided with an L-shaped lead busbar, one end of the CX connecting copper busbar is connected to the end of the C-phase coil through the L-shaped lead busbar, and the other end of the CX connecting copper busbar is connected to the beginning of the A-phase coil through the L-shaped lead busbar.

[0007] Furthermore, the width direction of the CX connecting copper busbar is set horizontally.

[0008] Further specifying, the low-voltage lead structure also includes an insulating support member, which is connected to the A-phase coil, B-phase coil, or C-phase coil, and the CX connecting copper busbar is located above the insulating support member and connected to the top of the insulating support member.

[0009] Furthermore, the number of insulating support members is two, and the two insulating support members are respectively connected to the B-phase coil or the C-phase coil.

[0010] Furthermore, the insulating support is a wooden support rod.

[0011] Furthermore, the width directions of both the ay connecting copper busbar and the bz connecting copper busbar are vertically oriented.

[0012] Further specified, both the ay connecting copper busbar and the bz connecting copper busbar are Z-shaped structures, the front end of the ay connecting copper busbar is connected to the end of the A-phase coil, the rear end of the ay connecting copper busbar is connected to the beginning of the B-phase coil, and the end of the A-phase coil is located in front of the beginning of the A-phase coil. The front end of the bz connecting copper busbar is connected to the end of the B-phase coil, and the rear end of the bz connecting copper busbar is connected to the beginning of the C-phase coil. The front end of the bz connecting copper busbar is located in front of the rear end of the ay connecting copper busbar.

[0013] Further specifying, the a-phase low-voltage sleeve is provided on the ay connecting copper busbar, the b-phase low-voltage sleeve is provided on the bz connecting copper busbar, and the c-phase low-voltage sleeve is provided on the cx connecting copper busbar.

[0014] A transformer comprising the aforementioned low-voltage lead structure.

[0015] The beneficial effects of this utility model are as follows: This invention optimizes the lead structure by separating the CX connecting copper busbar from the AY and BZ connecting copper busbars, reducing interference between them and improving the transformer's electrical performance and stability. It also improves heat dissipation in the low-voltage leads, reducing temperature rise. The reduced distance from the low-voltage coil to the oil tank significantly decreases the amount of oil used in the tank and transformer oil, lowering manufacturing costs. Furthermore, it solves the problem of localized overheating on the outer wall of the oil tank, reducing overall transformer losses. Attached Figure Description

[0016] Figure 1 This is the front view of the transformer of this utility model; Figure 2 This is a top view of the transformer of this utility model; Figure 3 This is a side view of the a-phase lead or b-phase lead of the transformer of this utility model; Figure 4 This is a side view of the C-phase lead of the transformer of this utility model; In the diagram, 1 is the A-phase coil; 2 is the B-phase coil; 3 is the C-phase coil; 4 is the ay connecting copper busbar; 5 is the bz connecting copper busbar; 6 is the cx connecting copper busbar; 7 is the wooden clamping piece; 8 is the first connecting piece; 9 is the second connecting piece; 10 is the third connecting piece; 11 is the low-voltage bushing; and 12 is the L-shaped lead busbar. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0021] Example 1 refer to Figure 1 This utility model provides a transformer, including an A-phase coil 1, a B-phase coil 2, a C-phase coil 3, a transformer box, a low-voltage bushing 11, and a low-voltage lead structure. The A-phase coil 1, B-phase coil 2, and C-phase coil 3 are all spaced apart in the transformer box. The low-voltage lead structure is connected to the A-phase coil 1, B-phase coil 2, and C-phase coil 3 in a delta connection. One end of the low-voltage bushing 11 is located on the outside of the transformer box, and the other end of the low-voltage bushing 11 extends to the inside of the transformer box and is connected to the low-voltage lead structure.

[0022] Specifically, the low-voltage lead structure includes ay connecting copper busbar 4, bz connecting copper busbar 5, and CX connecting copper busbar 6. These three busbars are arranged along the spacing of the three-phase coils. Bz connecting copper busbar 5 and ay connecting copper busbar 4 are located below CX connecting copper busbar 6, increasing its height. By layering the three connecting copper busbars, spatial wiring is achieved, avoiding an increase in horizontal distance. This reduces the distance from the low-voltage side coil to the oil tank, significantly reducing the amount of oil used in the tank and transformer oil, optimizing material usage, and lowering manufacturing costs. Simultaneously, it reduces electromagnetic interference between the connecting copper busbars, improving the transformer's electrical performance and stability, while also enhancing mechanical strength and short-circuit withstand capability.

[0023] To further explain, one end of the CX connecting copper busbar 6 is connected to the end of the C-phase coil 3, and the other end of the CX connecting copper busbar 6 is connected to the beginning of the A-phase coil 1. Since the ends of the A-phase coil 1, the B-phase coil 2, and the C-phase coil 3 are located on the same vertical end face, and the beginnings of the A-phase coil 1, the B-phase coil 2, and the C-phase coil 3 are also located on the same vertical end face, in order to ensure that the CX connecting copper busbar 6 is laid parallel to the side wall of the transformer box, and to avoid the connection position between the Ay connecting copper busbar 4 and the end of the A-phase coil 1, it is preferable that one end of the CX connecting copper busbar 6 is connected to the end of the C-phase coil 3 through the L-shaped lead busbar 12, and the other end of the CX connecting copper busbar 6 is connected to the beginning of the A-phase coil 1 through the L-shaped lead busbar. The L-shaped lead busbar 12 increases the height of the CX connecting copper busbar 6, while the top of the L-shaped lead busbar can pass through the top of the end of the A-phase coil 1 from above the beginning of the A-phase coil 1, ensuring structural stability and reliability.

[0024] To save space, it is preferable to set the width of the CX connecting copper busbar 6 horizontally to reduce the vertical height; the width of the AY connecting copper busbar 4 and the BZ connecting copper busbar 5 is set vertically to reduce the front and rear horizontal distance.

[0025] Meanwhile, since the span of the CX connecting copper busbar 6 is large, in order to ensure its structural stability and reliability, an insulating support 7 is selected to support the CX connecting copper busbar 6; optionally, the insulating support 7 is connected to the A-phase coil 1, B-phase coil 2 or C-phase coil 3 through a connector, and the CX connecting copper busbar 6 is located above the insulating support 7 and connected to the top of the insulating support 7.

[0026] Preferably, there are two insulating support members 7, and the two insulating support members 7 are respectively connected to the B-phase coil 2 or the C-phase coil 3.

[0027] The insulating support 7 can be a wooden support rod.

[0028] To further explain, in order to optimize the layout of the ay connecting copper busbar 4 and the bz connecting copper busbar 5, and to save space while ensuring electrical reliability, both the ay connecting copper busbar 4 and the bz connecting copper busbar 5 are optimized to have a Z-shaped structure. The front end of the ay connecting copper busbar 4 is connected to the end of the A-phase coil 1, and the rear end of the ay connecting copper busbar 4 is connected to the beginning of the B-phase coil 2. The end of the A-phase coil 1 is located in front of the beginning of the A-phase coil 1. The front end of the bz connecting copper busbar 5 is connected to the end of the B-phase coil 2, and the rear end of the bz connecting copper busbar 5 is connected to the beginning of the C-phase coil 3. The front end of the bz connecting copper busbar 5 is located in front of the rear end of the ay connecting copper busbar 4.

[0029] To further explain, the low-voltage bushing 11 includes a-phase low-voltage bushing, b-phase low-voltage bushing and c-phase low-voltage bushing. The a-phase low-voltage bushing is connected to the ay connecting copper busbar 4 through the first connecting piece 8. The b-phase low-voltage bushing is connected to the bz connecting copper busbar 5 through the second connecting piece 9. The c-phase low-voltage bushing is connected to the cx connecting copper busbar 6 through the third connecting piece 10.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A low-voltage lead structure, characterized in that, It includes an ay connecting copper busbar (4), a bz connecting copper busbar (5) and a cx connecting copper busbar (6), all of which are arranged in the same direction. The bz connecting copper busbar (5) and the ay connecting copper busbar (4) are both located below the cx connecting copper busbar (6).

2. The low-voltage lead structure according to claim 1, characterized in that, The bottom of the CX connecting copper busbar (6) is provided with an L-shaped lead busbar (12). One end of the CX connecting copper busbar (6) is connected to the end of the C-phase coil (3) through the L-shaped lead busbar, and the other end of the CX connecting copper busbar (6) is connected to the beginning of the A-phase coil (1) through the L-shaped lead busbar (12).

3. The low-voltage lead structure according to claim 2, characterized in that, The width direction of the CX connecting copper busbar (6) is set horizontally.

4. The low-voltage lead structure according to claim 3, characterized in that, The low-voltage lead structure also includes an insulating support (7), which is connected to the A-phase coil (1), the B-phase coil (2) or the C-phase coil (3). The cx connecting copper busbar (6) is located above the insulating support (7) and is connected to the top of the insulating support (7).

5. The low-voltage lead structure according to claim 4, characterized in that, The number of insulating support members (7) is two, and the two insulating support members (7) are respectively connected to the B-phase coil (2) or the C-phase coil (3).

6. The low-voltage lead structure according to claim 4, characterized in that, The insulating support (7) is a wooden support rod.

7. The low-voltage lead structure according to claim 3, characterized in that, The width direction of the ay connecting copper busbar (4) and the width direction of the bz connecting copper busbar (5) are both vertically set.

8. The low-voltage lead structure according to claim 7, characterized in that, Both the ay connecting copper busbar (4) and the bz connecting copper busbar (5) are Z-shaped structures. The front end of the ay connecting copper busbar (4) is connected to the end of the A-phase coil (1), and the rear end of the ay connecting copper busbar (4) is connected to the beginning of the B-phase coil (2). The end of the A-phase coil (1) is located in front of the beginning of the A-phase coil (1). The front end of the bz connecting copper busbar (5) is connected to the end of the B phase coil (2), the rear end of the bz connecting copper busbar (5) is connected to the beginning of the C phase coil (3), and the front end of the bz connecting copper busbar (5) is located in front of the rear end of the ay connecting copper busbar (4).

9. The low-voltage lead structure according to claim 7, characterized in that, The ay connecting copper busbar (4) is provided with an a-phase low-voltage sleeve, the bz connecting copper busbar (5) is provided with a b-phase low-voltage sleeve, and the cx connecting copper busbar (6) is provided with a c-phase low-voltage sleeve.

10. A transformer, characterized in that, Includes the low-voltage lead structure as described in any one of claims 1 to 9.

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