Transformer adopting low-voltage D wiring structure

Abstract

The utility model relates to the technical field of transformers, in particular to a transformer adopting a low-voltage D wiring structure, which comprises a transformer coil and a wiring structure, and the wiring structure comprises a first low-voltage lead row and a second low-voltage lead row which are arranged corresponding to an A phase; the third low-voltage lead row and the fourth low-voltage lead row are arranged corresponding to the B phase; the fifth low-voltage lead row and the sixth low-voltage lead row are arranged corresponding to the C phase; the device further comprises a first connecting bar, a second connecting bar, a third connecting bar, a fourth connecting bar and a plurality of transition bars. The overall dimension of the oil tank can be reduced, the influence of the four connecting bars on the temperature rise of the transformer is reduced, the effect of improving the temperature rise of the transformer is achieved, and an electromagnetic scheme of the transformer is convenient to design. The technical problems that due to an existing wiring structure, the boundary dimension of an oil tank is increased, the transportation and installation difficulty is increased, the performance and the service life of a transformer product are affected due to temperature rise above a coil, and an electromagnetic scheme of the transformer is inconvenient to design are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer technical field, especially a kind of transformer of low-voltage D connection wiring structure. BACKGROUND

[0002] In recent years, with the sustained development of China's economy and the continuous improvement of people's living standards, the demand for electricity is growing rapidly, in order to meet this demand, the capacity of transformer is getting larger and larger, and the size of transformer is also getting larger and larger. Oil surface temperature rise refers to the difference between the temperature of the top oil layer of the transformer and the surrounding environment, which is an important indicator of measuring the operating state of the transformer.

[0003] In the existing transformer product, when the low-voltage connection group of the transformer is D connection, the D connection is generally made above the coil by extending the upper lead of the coil, and then the lower lead of the coil is connected to the low-voltage bushing through the transition row. However, this connection method of placing the connection row, which is the heat source, above the coil, will cause the temperature above the coil to rise, which not only affects the performance of the transformer, but also shortens the service life of the transformer. At this time, the number of fin fans of the heat sink or the fin fan spacing of the heat sink needs to be increased to meet the performance indicators of the oil surface temperature rise, but these two processing methods will increase the size of the oil tank. Moreover, the connection row is placed above the coil, which increases the total height of the transformer core, and thus increases the height of the oil tank, and the space occupied by the transformer also increases, making the transportation and installation of the transformer more difficult. In addition, the temperature rise will affect the material performance, core permeability, safety performance and other aspects, if the temperature rise is too high, the above aspects need to be considered in the electromagnetic scheme design of the transformer, which increases the design difficulty and makes it inconvenient to design the electromagnetic scheme of the transformer. SUMMARY

[0004] The main purpose of the utility model is to provide a kind of transformer of low-voltage D connection wiring structure, which fully utilizes the internal space of the oil tank, reduces the size of the oil tank, reduces the manufacturing cost and transportation cost, reduces the influence of the connection row on the temperature rise of the transformer, improves the temperature rise of the transformer, and facilitates the design of the electromagnetic scheme of the transformer. The technical problems of the existing wiring structure causing the size of the oil tank to increase, the difficulty of transportation and installation to increase, the temperature above the coil to rise and affect the performance and service life of the transformer product, and the inconvenience of designing the electromagnetic scheme of the transformer are solved.

[0005] To achieve the above objectives, this utility model proposes a transformer with a low-voltage D-connection structure, comprising a transformer coil and a connection structure. The connection structure includes A, B, and C phases arranged side by side, and includes: a first low-voltage lead bus and a second low-voltage lead bus corresponding to the A phase; a third low-voltage lead bus and a fourth low-voltage lead bus corresponding to the B phase; and a fifth low-voltage lead bus and a sixth low-voltage lead bus corresponding to the C phase.

[0006] The wiring structure further includes a first connecting bar, a second connecting bar, a third connecting bar, a fourth connecting bar, and several transition bars; the second low-voltage lead bar and the third low-voltage lead bar are respectively connected to the third connecting bar; the fourth low-voltage lead bar and the fifth low-voltage lead bar are respectively connected to the fourth connecting bar; the sixth low-voltage lead bar is connected to the first low-voltage lead bar through the second connecting bar and the first connecting bar;

[0007] The first connecting bar, the second connecting bar, the third connecting bar, and the fourth connecting bar are all located below the transformer coil. The second connecting bar, the third connecting bar, and the fourth low-voltage lead bar are respectively connected to the low-voltage bushing through the transition bar.

[0008] Optionally, the two ends of the third connecting bar are respectively connected to the second low-voltage lead bar and the third low-voltage lead bar;

[0009] The two ends of the fourth connecting bar are respectively connected to the fourth low-voltage lead bar and the fifth low-voltage lead bar;

[0010] One end of the second connecting bar is connected to the sixth low-voltage lead bar, the other end of the second connecting bar is connected to the first connecting bar, and the end of the first connecting bar away from the second connecting bar is connected to the first low-voltage lead bar.

[0011] Optionally, the first connecting bar includes a first connecting plate, a second connecting plate, and a third connecting plate. One end of the first connecting plate is connected to one end of the second connecting plate, the other end of the second connecting plate is connected to the third connecting plate, and the third connecting plate is connected to the first low-voltage lead bar.

[0012] The second connecting plate is perpendicular to the length direction of the first connecting plate, and the second connecting plate is perpendicular to the third connecting plate.

[0013] Optionally, the second connecting row is Z-shaped.

[0014] Optionally, the end of the third connecting bar away from the third connecting plate is provided with a first bend, and the first bend is connected to the third low-voltage lead bar;

[0015] The fourth connecting row is provided with a second bending part near the end of the first bending part, and the second bending part is connected with the fourth low-voltage lead row.

[0016] Optionally, the first bending part and the second bending part are both L-shaped.

[0017] Optionally, the first low-voltage lead row is connected with the second connecting plate near one side of the third connecting row.

[0018] The second low-voltage lead row and the third low-voltage lead row are respectively connected with the third connecting row near one side of the first connecting row.

[0019] The fourth low-voltage lead row and the fifth low-voltage lead row are respectively connected with the fourth connecting row near one side of the second connecting row.

[0020] The sixth low-voltage lead row is connected with the second connecting row near one side of the fourth connecting row.

[0021] Optionally, the two sides of the fourth low-voltage lead row are respectively connected with the fourth connecting row and one transition row; the two sides of the second connecting row are respectively connected with the first connecting row and one transition row; one side of the third connecting row near the first connecting row is connected with one transition row.

[0022] Optionally, the connecting places of the first low-voltage lead row, the second low-voltage lead row, the third low-voltage lead row, the fourth low-voltage lead row, the fifth low-voltage lead row, the sixth low-voltage lead row, the first connecting row, the second connecting row, the third connecting row, the fourth connecting row and the transition rows are respectively provided with one corresponding through hole.

[0023] Optionally, the upper end faces of the transition rows are flush, and the transition rows near one end of the low-voltage sleeve are provided with clamping pieces.

[0024] Compared with the prior art, the embodiments of the utility model have the following beneficial effects:

[0025] The transformer adopting the low-voltage D connection wiring structure has the advantages that the structure is reasonable and compact, the first connecting row, the second connecting row, the third connecting row and the fourth connecting row are arranged below the transformer coil, the internal space of the oil tank is fully utilized by the D connection mode below the transformer coil, the appearance size of the oil tank can be reduced, the transportation and installation difficulty is reduced, the manufacturing cost and the transportation cost can be reduced, the first connecting row, the second connecting row, the third connecting row and the fourth connecting row are arranged below the transformer coil, the influence of the four connecting rows on the temperature rise of the transformer is reduced, the function of improving the temperature rise of the transformer is achieved, the transformer is not too high, the electromagnetic scheme of the transformer is facilitated to be designed, the transformer has the characteristics of high performance and long service life, and the technical problems that the appearance size of the oil tank is increased, the transportation and installation difficulty is increased, the temperature rise above the coil is increased to affect the performance and the service life of the transformer product, and the electromagnetic scheme of the transformer is not convenient to design are solved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a structure schematic view of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model;

[0027] Figure 2 It is a structure schematic view of the wiring structure of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model;

[0028] Figure 3 It is a top view of the wiring structure of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model;

[0029] Figure 4 It is a structure schematic view of the wiring structure of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model (remove transition row);

[0030] Figure 5 It is a structure schematic view of the first connecting row, the second connecting row, the third connecting row and the fourth connecting row of the wiring structure of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model;

[0031] Figure 6 It is a top view of the first connecting row, the second connecting row, the third connecting row and the fourth connecting row of the wiring structure of the transformer adopting the low-voltage D connection wiring structure of an embodiment of the utility model.

[0032] Wherein: 1, transformer coil; 2, wiring structure; 201, first low-voltage lead row; 202, second low-voltage lead row; 203, third low-voltage lead row; 204, fourth low-voltage lead row; 205, fifth low-voltage lead row; 206, sixth low-voltage lead row; 207, first connecting row; 2071, first connecting plate; 2072, second connecting plate; 2073, third connecting plate; 208, second connecting row; 2081, fourth connecting plate; 2082, fifth connecting plate; 2083, sixth connecting plate; 209, third connecting row; 2091, first bending part; 210, fourth connecting row; 2101, second bending part; 211, transition row; 2111, clamp; 3, through hole. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0035] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, the meaning of "and / or" appearing throughout the text is to include three parallel schemes, for example, "A and / or B", including A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0037] The utility model provides a kind of transformer of low-voltage D connection wiring structure.

[0038] In the embodiments of the present application, as shown in Figures 1 to 4 The transformer of low-voltage D connection wiring structure includes transformer coil 1 and wiring structure 2, wiring structure 2 includes A, B, C phase arranged side by side, wiring structure 2 includes: the first low-voltage lead row 201 and the second low-voltage lead row 202 are arranged corresponding to A phase;The third low-voltage lead row 203 and the fourth low-voltage lead row 204 are arranged corresponding to B phase;The fifth low-voltage lead row 205 and the sixth low-voltage lead row 206 are arranged corresponding to C phase;

[0039] Wiring structure 2 further includes first connecting row 207, second connecting row 208, third connecting row 209, fourth connecting row 210 and a plurality of transition row 211;Second low-voltage lead row 202 and third low-voltage lead row 203 are connected with third connecting row 209 respectively;Fourth low-voltage lead row 204 and fifth low-voltage lead row 205 are connected with fourth connecting row 210 respectively;The sixth low-voltage lead row 206 is connected with the first low-voltage lead row 201 through second connecting row 208 and first connecting row 207;

[0040] First connecting row 207, second connecting row 208, third connecting row 209 and fourth connecting row 210 are all arranged below transformer coil 1, and second connecting row 208, third connecting row 209 and fourth low-voltage lead row 204 are connected with low-voltage bushing through transition row 211 respectively.

[0041] The transformer with the low-voltage D connection structure is reasonable and compact in structure, the first connecting row 207, the second connecting row 208, the third connecting row 209 and the fourth connecting row 210 are arranged below the transformer coil 1, the inside space of the oil tank is fully utilized by the D connection mode below the transformer coil 1, the appearance size of the oil tank can be reduced, the transportation and installation difficulty is further reduced, the manufacturing cost and the transportation cost can be reduced, the first connecting row 207, the second connecting row 208, the third connecting row 209 and the fourth connecting row 210 are arranged below the transformer coil 1, the influence of the four connecting rows on the temperature rise of the transformer is reduced, the temperature rise of the transformer is improved, the transformer is not too high, the electromagnetic scheme of the transformer is facilitated to be designed, and the transformer has the characteristics of high performance and long service life.

[0042] Specifically, the first low-voltage lead row 201 is arranged opposite to the second low-voltage lead row 202, the third low-voltage lead row 203 is arranged opposite to the fourth low-voltage lead row 204, and the fifth low-voltage lead row 205 is arranged opposite to the sixth low-voltage lead row 206.

[0043] As shown in the drawings, Figures 2 to 4 In an embodiment of the present application, the two ends of the third connecting row 209 are connected with the second low-voltage lead row 202 and the third low-voltage lead row 203 respectively.

[0044] The two ends of the fourth connecting row 210 are connected with the fourth low-voltage lead row 204 and the fifth low-voltage lead row 205 respectively.

[0045] One end of the second connecting row 208 is connected with the sixth low-voltage lead row 206, the other end of the second connecting row 208 is connected with the first connecting row 207, and the end of the first connecting row 207, away from the second connecting row 208, is connected with the first low-voltage lead row 201.

[0046] In the embodiment, one end of the connecting row is connected with one winding lead row, the structure is reasonable and compact, and the structural stability is high.

[0047] As shown in the drawings, Figures 4 to 6 In an embodiment of the present application, the first connecting row 207 comprises a first connecting plate 2071, a second connecting plate 2072 and a third connecting plate 2073, one end of the first connecting plate 2071 is connected with one end of the second connecting plate 2072, the other end of the second connecting plate 2072 is connected with the third connecting plate 2073, and the third connecting plate 2073 is connected with the first low-voltage lead row 201.

[0048] The second connecting plate 2072 is arranged perpendicularly along the length direction of the first connecting plate 2071, and the second connecting plate 2072 is perpendicular to the third connecting plate 2073.

[0049] The first connecting row 207 includes the first connecting plate 2071, the second connecting plate 2072 and the third connecting plate 2073, and can meet the connection requirements of two different positions of the first low-voltage lead row 201 and the second connecting row 208, so that the first low-voltage lead row 201 and the second connecting row 208 can be more conveniently connected by the first connecting row 207, and the connection of the first low-voltage lead row 201 and the sixth low-voltage lead row 206 is realized. The second connecting plate 2072 is arranged perpendicularly along the length direction of the first connecting plate 2071, and the second connecting plate 2072 is perpendicular to the third connecting plate 2073, so that the first connecting plate 2071 and the third connecting plate 2073 are parallel to each other, the first low-voltage lead row 201 and the second connecting row 208 can be conveniently connected, and the overall structure can also be improved in appearance.

[0050] Specifically, the end portion of the third connecting row 209 connected with the second low-voltage lead row 202 is located between the first connecting plate 2071 and the third connecting plate 2073.

[0051] As shown in FIG. 1, Figures 4 to 6 In an embodiment of the present application, the second connecting row 208 has a Z shape.

[0052] The second connecting row 208 has a Z shape, which is designed according to the connection requirements of two different positions of the first connecting row 207 and the sixth low-voltage lead row 206, so that the connection layout is more flexible, the first connecting row 207 and the sixth low-voltage lead row 206 are connected, and the connection mode between the two is avoided to be too complex.

[0053] Specifically, the second connecting row 208 includes the fourth connecting plate 2081, the fifth connecting plate 2082 and the sixth connecting plate 2083, wherein the fourth connecting plate 2081 is connected with the first connecting plate 2071, and the sixth connecting plate 2083 is connected with the sixth low-voltage lead row 206; the two ends of the fifth connecting plate 2082 are connected with the fourth connecting plate 2081 and the sixth connecting plate 2083 respectively, and the fourth connecting plate 2081 and the sixth connecting plate 2083 are parallel to each other; the fifth connecting plate 2082 is arranged obliquely between the fourth connecting plate 2081 and the sixth connecting plate 2083, and the distance between the fourth connecting row 210 and the fourth connecting plate 2081 is greater than the distance between the fourth connecting row 210 and the sixth connecting plate 2083.

[0054] As shown in FIG. 1, Figure 5 and 6As shown, in an embodiment of the present application, a first bending portion 2091 is provided at an end of the third connection row 209 away from the third connection plate 2073, and the first bending portion 2091 is connected to the third low-voltage lead row 203;

[0055] A second bending portion 2101 is provided at an end of the fourth connection row 210 close to the first bending portion 2091, and the second bending portion 2101 is connected to the fourth low-voltage lead row 204.

[0056] By providing the first bending portion 2091 at the end of the third connection row 209 away from the third connection plate 2073, the third connection row 209 can be reasonably connected to the third low-voltage lead row 203; by providing the second bending portion 2101 at the end of the fourth connection row 210 close to the first bending portion 2091, the fourth connection row 210 can be reasonably connected to the fourth low-voltage lead row 204. The settings of the first bending portion 2091 and the second bending portion 2101 can simplify the connection methods between the third low-voltage lead row 203 and the third connection row 209, and between the fourth low-voltage lead row 204 and the fourth connection row 210, thereby reducing the complexity of the overall structure.

[0057] As Figure 5 and 6 shown, in an embodiment of the present application, both the first bending portion 2091 and the second bending portion 2101 are L-shaped.

[0058] Both the first bending portion 2091 and the second bending portion 2101 are L-shaped. At this time, the first bending portion 2091 and the second bending portion 2101 are distributed in a "square" shape, which not only effectively utilizes space but also makes the wiring structure 2 more aesthetic.

[0059] Optionally, the third connection row 209 and the fourth connection row 210 adopt the same size specifications. Adopting the same size specifications for both not only reduces the installation difficulty and the mold management difficulty but also effectively improves the production efficiency.

[0060] As Figures 2 to 6 shown, in an embodiment of the present application, the first low-voltage lead row 201 is connected to a side of the second connection plate 2072 close to the third connection row 209;

[0061] The second low-voltage lead row 202 and the third low-voltage lead row 203 are respectively connected to a side of the third connection row 209 close to the first connection row 207;

[0062] The fourth low-voltage lead row 204 and the fifth low-voltage lead row 205 are respectively connected to a side of the fourth connection row 210 close to the second connection row 208;

[0063] The sixth low-voltage lead row 206 is connected to a side of the second connection row 208 close to the fourth connection row 210.

[0064] Through the above connection mode, all the lead rows (including the first low-voltage lead row 201, the second low-voltage lead row 202, the third low-voltage lead row 203, the fourth low-voltage lead row 204, the fifth low-voltage lead row 205, and the sixth low-voltage lead row 206) are arranged in the space enclosed by the first connection row 207, the second connection row 208, the third connection row 209, and the fourth connection row 210, so that each lead row is provided with support and protection, and in addition, the wiring structure 2 is visually more harmonious and unified, and the overall aesthetic property of the wiring structure 2 is improved.

[0065] As shown in Figure 2 and 3 In an embodiment of the present application, the fourth low-voltage lead row 204 is connected to the fourth connection row 210 and a transition row 211 on both sides, the second connection row 208 is connected to the first connection row 207 and a transition row 211 on both sides, and the side of the third connection row 209 close to the first connection row 207 is connected to a transition row 211.

[0066] Through the above connection mode, the fourth low-voltage lead row 204 and the fifth low-voltage lead row 205 can be connected to the low-voltage bushing through a transition row 211, the first low-voltage lead row 201 and the sixth low-voltage lead row 206 can be connected to the low-voltage bushing through a transition row 211, and the second low-voltage lead row 202 and the third low-voltage lead row 203 can be connected to the low-voltage bushing through a transition row 211, so that the smooth transmission and extraction of electric energy can be finally realized.

[0067] As shown in Figure 4 and 5 In an embodiment of the present application, a corresponding through hole 3 is arranged at the connection position of the first low-voltage lead row 201, the second low-voltage lead row 202, the third low-voltage lead row 203, the fourth low-voltage lead row 204, the fifth low-voltage lead row 205, the sixth low-voltage lead row 206, the first connection row 207, the second connection row 208, the third connection row 209, the fourth connection row 210, and the transition rows 211.

[0068] A corresponding through hole 3 is arranged on each lead row, each connection row, and each transition row 211, so that a bolt can pass through, and the bolt and nut are used for fixed connection. Through the fastening effect of the bolt and the nut, the connection between the lead rows, the connection rows, and the transition rows 211 is firm and reliable, and in addition, subsequent maintenance or replacement of parts is facilitated.

[0069] As shown in Figure 1 and 2 In an embodiment of the present application, the upper end surfaces of the transition rows 211 are flush, and the end close to the low-voltage bushing of the transition rows 211 is provided with a clamping piece 2111.

[0070] The upper end surfaces of the plurality of transition rows 211 being flush can improve the overall aesthetics of the wiring structure 2, and also facilitates fixing the plurality of transition rows 211 close to one end of the low-voltage bushing by the clamping piece 2111, avoiding the situation that the transition rows 211 shake during the operation of the transformer, and thus the stability of the structure can be improved.

[0071] The technical principles of the present application are described above in combination with specific embodiments. These descriptions are only for explaining the principles of the present application, and cannot be interpreted in any way as limiting the protection scope of the present application. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the present application.

Claims

1. A transformer employing a low voltage delta connection, comprising a transformer winding and a connection structure, said connection structure comprising A, B, C phases arranged side by side, characterized in that, The wiring structure comprises: a first low-voltage lead row and a second low-voltage lead row arranged corresponding to the A phase; a third low-voltage lead row and a fourth low-voltage lead row arranged corresponding to the B phase; a fifth low-voltage lead row and a sixth low-voltage lead row arranged corresponding to the C phase; The wiring structure further comprises a first connecting row, a second connecting row, a third connecting row, a fourth connecting row and a plurality of transition rows; the second low-voltage lead row and the third low-voltage lead row are connected with the third connecting row respectively; the fourth low-voltage lead row and the fifth low-voltage lead row are connected with the fourth connecting row respectively; the sixth low-voltage lead row is connected with the first low-voltage lead row through the second connecting row and the first connecting row; The first connecting row, the second connecting row, the third connecting row and the fourth connecting row are arranged below the transformer coil, and the second connecting row, the third connecting row and the fourth low-voltage lead row are connected with low-voltage bushings through the transition rows respectively.

2. The transformer employing a low-voltage D-connection structure according to claim 1, characterized by, Two ends of the third connecting row are connected with the second low-voltage lead row and the third low-voltage lead row respectively; Two ends of the fourth connecting row are connected with the fourth low-voltage lead row and the fifth low-voltage lead row respectively; One end of the second connecting row is connected with the sixth low-voltage lead row, and the other end of the second connecting row is connected with the first connecting row, and one end of the first connecting row away from the second connecting row is connected with the first low-voltage lead row.

3. The transformer employing a low voltage D-connection configuration according to claim 2, characterized by, The first connecting row comprises a first connecting plate, a second connecting plate and a third connecting plate, one end of the first connecting plate is connected with one end of the second connecting plate, the other end of the second connecting plate is connected with the third connecting plate, and the third connecting plate is connected with the first low-voltage lead row; The second connecting plate is arranged vertically along the length direction of the first connecting plate, and the second connecting plate is perpendicular to the third connecting plate.

4. The transformer employing a low-voltage D-connection structure according to claim 3, characterized by The second connecting row is in the shape of Z.

5. The transformer employing a low-voltage D-connection structure according to claim 3, characterized by An end of the third connecting row away from the third connecting plate is provided with a first bending part, and the first bending part is connected with the third low-voltage lead row; An end of the fourth connecting row close to the first bending part is provided with a second bending part, and the second bending part is connected with the fourth low-voltage lead row.

6. The transformer employing a low voltage D-connection configuration according to claim 5, wherein, The first bending part and the second bending part are both in the shape of L.

7. The transformer employing a low voltage D-connection structure according to claim 3, characterized by, The first low-voltage lead row is connected with one side of the second connecting plate close to the third connecting row; The second low-voltage lead row and the third low-voltage lead row are connected with one side of the third connecting row close to the first connecting row respectively; The fourth low-voltage lead row and the fifth low-voltage lead row are connected with one side of the fourth connecting row close to the second connecting row respectively; The sixth low-voltage lead row is connected with one side of the second connecting row close to the fourth connecting row.

8. The transformer employing a low voltage D-connection configuration according to claim 7, wherein, Two sides of the fourth low-voltage lead row are connected with the fourth connecting row and one of the transition rows respectively; two sides of the second connecting row are connected with the first connecting row and one of the transition rows respectively; one side of the third connecting row close to the first connecting row is connected with one of the transition rows.

9. The transformer employing a low voltage D-connection configuration according to claim 1, wherein, The first low-voltage lead row, the second low-voltage lead row, the third low-voltage lead row, the fourth low-voltage lead row, the fifth low-voltage lead row, the sixth low-voltage lead row, the first connecting row, the second connecting row, the third connecting row, the fourth connecting row and the transition rows are respectively provided with corresponding through holes.

10. The transformer employing a low voltage D-connection configuration according to claim 1, wherein, The upper end surfaces of the transition rows are flush, and the transition rows close to one end of the low-voltage bushing are provided with clamping pieces.

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