Three-phase high-voltage coil wiring structure of oil-immersed transformer

Abstract

The utility model discloses an oil -immersed transformer three -phase high -voltage coil wiring structure, including the A phase high -voltage coil, B phase high -voltage coil, C phase high -voltage coil of left to right transverse " a " character arrangement, A phase high -voltage coil is equipped with first end connector one, tail end connector one, and is equipped with a plurality of branch tap one to left end of front side, B phase high -voltage coil is equipped with first end connector two, tail end connector two, and is equipped with a plurality of branch tap two to left end of front side, C phase high -voltage coil is equipped with first end connector three, tail end connector three, and is equipped with a plurality of branch tap three to left end of front side, and the branch tap of each phase high -voltage coil and tail end connector meet and are all accessed branch switch through the lead wire of left side upper extension. The three -phase high -voltage coil wiring structure of the utility model significantly shortens the length of the lead wire for connecting the corresponding branch tap, tail end connector two and branch switch on three -phase high -voltage coil, and the lead wire consumption and corresponding lead wire cost expense are greatly reduced, and the economic benefit is good, and the short -circuit resistance of lead wire is improved simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, specifically to a wiring structure for a three-phase high-voltage coil of an oil-immersed transformer. Background Technology

[0002] A transformer is a static electrical device that uses the principle of electromagnetic induction to convert alternating current (AC) energy of one voltage level into AC energy of another. The main function of a transformer in a power system is to transform voltage to facilitate power transmission. Transformers can be classified into dry-type transformers and oil-immersed transformers according to their cooling method. Oil-immersed transformers mainly consist of a core, oil tank, cooling system, protection system, and lead-out devices. The core includes an iron core, coils, insulation components, and leads. The coils are wound around the iron core, and the leads include high-voltage leads, low-voltage leads, and a neutral wire.

[0003] like Figures 1-3As shown, a three-phase high-voltage coil wiring structure for an oil-immersed transformer includes a phase A high-voltage coil I, a phase B high-voltage coil II, a phase C high-voltage coil III, a zero-phase start-end connector d, and a support IV. The phase A high-voltage coil I, phase B high-voltage coil II, and phase C high-voltage coil III are arranged horizontally in a straight line. The support IV includes a horizontal bar 1 located horizontally above and in front of the phase A high-voltage coil I, phase B high-voltage coil II, and phase C high-voltage coil III. From left to right, the horizontal bar 1 is fixed with vertical bars 2, 3, 4, 5, and 6 extending downwards. Vertical bar 2 corresponds to the phase A high-voltage coil. The front left end of phase I and vertical rod 56 are located at the front left end of phase C high voltage coil III; the front end of phase A high voltage coil I is provided with a first end connector 1a, the rear end is provided with a rear end connector 1x, and the front right end is provided with several taps 17; the front end of phase B high voltage coil II is provided with a first end connector 2b, the rear end is provided with a rear end connector 2y, and the front right end is provided with several taps 28; the front end of phase C high voltage coil III is provided with a first end connector 3c, the rear end is provided with a rear end connector 3z, and the front right end is provided with several taps 39; the zero phase first end connector d, first end connector 1a, first end connector 2b, and first end connector 3c are arranged from left to right. Each of the following components is vertically pressed and fixed to the rear side of the horizontal bar 1 by the pressing assembly 10: Several taps 7 and tail connectors x converge and are connected to the tap switch via a lead wire 7-1 extending upwards to the left; the lead wire 7-1 is pressed and fixed to the lower end of the rear side of the vertical bar 2 by the pressing assembly 10; Several taps 8 and tail connectors y converge and are connected to the tap switch via a lead wire 8-1 extending upwards to the left; the lead wire 8-1 is pressed and fixed to the rear sides of the vertical bar 3, vertical bar 2, and vertical bar 2 by the pressing assembly 10 from right to left; Several taps 9... After merging with the tail connector three z, the lead wire three 9-1 extends to the upper left and is connected to the tap switch. The lead wire three 9-1 is pressed and fixed to the rear side of the five vertical rods five 6, four 5, three 4, two 3 and one 2 from right to left by the clamping assembly 10. The lower end face of the horizontal rod 1 is fixed with a number of channel steel supports one 11 extending to the rear side from left to right. The lower ends of the five vertical rods one 2, two 3, three 4, four 5 and five 6 are all vertically fixed with horizontal support legs 12 extending to the rear side. The lower end face of the horizontal support legs 12 is fixed with channel steel support two 13 that is consistent with its length direction. The problem with the wiring structure of the three-phase high-voltage coil of this oil-immersed transformer is that the taps of the three-phase high-voltage coils are all led out from the front right end, and then connected to the tap changer via leads wound around the front of the high-voltage coil and extending to the upper left. The lead length is relatively long, resulting in higher lead cost. In addition, the long lead length will also reduce the short-circuit withstand capability of the leads, posing a hidden danger to the safe operation of the oil-immersed distribution transformer.Therefore, this utility model proposes a novel three-phase high-voltage coil wiring structure for an oil-immersed transformer to solve the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a wiring structure for the three-phase high-voltage coil of an oil-immersed transformer. By leading the corresponding taps on the three-phase high-voltage coil from the front left end, compared to leading the corresponding taps from the front right end, the length of the leads used to connect the corresponding taps, the tail connectors, and the tap changer on the three-phase high-voltage coil is significantly shortened. This greatly reduces the amount of leads used and the corresponding lead costs, resulting in good economic benefits. The effectively shortened length of the leads used to connect the corresponding taps, the tail connectors, and the tap changer on the three-phase high-voltage coil improves the short-circuit withstand capability of the leads, which helps to improve the safety of the oil-immersed distribution transformer during operation. The wiring structure of the three-phase high-voltage coil has a reasonable layout, high feasibility for application, and strong practicality.

[0005] To achieve the above objectives, the technical solution of this utility model is to design a three-phase high-voltage coil wiring structure for an oil-immersed transformer, including an A-phase high-voltage coil, a B-phase high-voltage coil, a C-phase high-voltage coil, a zero-phase start-end connector, and a support. The A-phase, B-phase, and C-phase high-voltage coils are arranged horizontally in a straight line from left to right. The A-phase high-voltage coil has a start-end connector 1 at its start end and a tail-end connector 1 at its tail end. The B-phase high-voltage coil has a start-end connector 2 at its start end and a tail-end connector 2 at its tail end. The C-phase high-voltage coil has a start-end connector 3 at its start end and a tail-end connector 3 at its tail end. The support is laid longitudinally parallel to the front of the A-phase, B-phase, and C-phase high-voltage coils. The zero-phase... The first end connector, first end connector one, first end connector two, and first end connector three are pressed and fixed on the upper rear side of the bracket. The left front end of the A-phase high-voltage coil is provided with several taps one, the left front end of the B-phase high-voltage coil is provided with several taps two, and the left front end of the C-phase high-voltage coil is provided with several taps three. The taps one and the tail end connector one are joined together and connected to the tap switch via a lead wire one extending to the upper left. The taps two and the tail end connector two are joined together and connected to the tap switch via a lead wire two extending to the upper left. The taps three and the tail end connector three are joined together and connected to the tap switch via a lead wire three extending to the upper left. Both lead wires two and three are pressed and fixed on the rear side of the bracket.

[0006] This utility model discloses a three-phase high-voltage coil wiring structure for an oil-immersed transformer. By extending the corresponding taps on the three-phase high-voltage coils from their front left end, compared to extending them from the front right end, the length of the leads connecting the corresponding taps and tail connectors to the tap changer on the three-phase high-voltage coils is significantly shortened. This greatly reduces the amount of lead wire used and the corresponding lead wire costs, resulting in good economic benefits. The effectively shortened length of the leads connecting the corresponding taps and tail connectors to the tap changer improves the short-circuit withstand capability of the leads, contributing to improved safety during operation of the oil-immersed distribution transformer. The three-phase high-voltage coil wiring structure has a reasonable layout, high feasibility for application, and strong practicality.

[0007] A preferred technical solution is that the support includes a horizontal bar located above the front sides of the A-phase high-voltage coil, B-phase high-voltage coil, and C-phase high-voltage coil. Vertical bars extending downwards are fixedly fixed to the horizontal bar from left to right at intervals. Vertical bar one corresponds to the front left end of the A-phase high-voltage coil, vertical bar two corresponds to the front right end of the A-phase high-voltage coil, and vertical bar three corresponds to the front right end of the B-phase high-voltage coil. The zero-phase start-end connector, start-end connector one, start-end connector two, and start-end connector three are vertically pressed and fixed to the rear side of the horizontal bar from left to right by a pressing assembly. Lead wire two is pressed and fixed to the rear sides of both vertical bars two and one from right to left by a pressing assembly. Lead wire three is pressed and fixed to the rear sides of vertical bars three, two, and one from right to left by a pressing assembly. By leading the corresponding taps on the three-phase high-voltage coils out from their front left end, the wiring structure of the three-phase high-voltage coils is concentrated at the front left end of the three-phase high-voltage coils. At the same time, the brackets used to support the leads are also concentrated at the front left end of the three-phase high-voltage coils, which greatly simplifies the bracket structure and reduces the amount of material used in the brackets. The number of fixing points for the leads on the brackets is greatly reduced, which helps to improve the construction efficiency of the wiring structure of the three-phase high-voltage coils of the oil-immersed distribution transformer.

[0008] A further preferred technical solution is that several of the aforementioned taps are clamped together by a set of clamping components and then merged with the tail connector. Connecting several taps together by a set of clamping components helps improve the ease of connection when the several taps and tail connector are merged and then connected to the lead wire.

[0009] A further preferred technical solution includes a clamping assembly comprising a U-shaped clamping block and screws passing through both ends of the U-shaped clamping block, wherein the U-shaped clamping block is fixed to the bracket by the screws passing through both ends; and a clamping assembly comprising two corresponding clamping plates that snap together and a bolt assembly passing through both ends of the two clamping plates and locking them together. The clamping assembly has a clever and reasonable structural design, and its installation method on the rear side of the bracket is simple, which helps to further improve the construction efficiency of the three-phase high-voltage coil wiring structure of the oil-immersed distribution transformer of this utility model.

[0010] A further preferred technical solution is that the right end of lead wire two and the middle part of lead wire three are pressed and fixed to the rear side of vertical rod two by the same set of clamping components, and the left end of lead wire two and the left end of lead wire three are pressed and fixed to the rear side of vertical rod one by the same set of clamping components. This provides good ease of construction and further helps to improve the construction efficiency of the three-phase high-voltage coil wiring structure of the oil-immersed distribution transformer of this utility model.

[0011] A further preferred technical solution includes a plurality of rearward-extending channel steel supports 1 fixedly fixed at intervals from left to right on the lower end face of the crossbar. The lower ends of the vertical bars 1, 2, and 3 are flush, and each of the three is fixedly equipped with a rearward-extending channel steel support 2 at its lower end. The upper end of the bracket is fixedly connected to the corresponding component through the channel steel support 1, and the lower end of the bracket is placed and fixed to the bottom of the vessel body through the channel steel support 2, ensuring that the bracket is simple to install and has good stability inside the vessel body.

[0012] A further preferred technical solution is that each of the lead wires (lead one, lead two, lead three, and the corresponding clamping components) is covered with an insulating layer. The insulating layer protects and insulates the lead wires, effectively preventing crimping damage during the process of the lead wires being fixed and clamped to the rear side of the bracket by the clamping components. This helps ensure the safety of assembly and construction of the three-phase high-voltage coil wiring structure of the oil-immersed transformer of this utility model.

[0013] The advantages and beneficial effects of this utility model are as follows:

[0014] 1. This utility model discloses a three-phase high-voltage coil wiring structure for an oil-immersed transformer. By extending the corresponding taps on the three-phase high-voltage coil from the front left end, compared to extending them from the front right end, the length of the leads connecting the corresponding taps and tail connectors to the tap changer on the three-phase high-voltage coil is significantly shortened. This greatly reduces the amount of lead wire used and the corresponding lead wire cost, resulting in good economic benefits. The effectively shortened length of the leads connecting the corresponding taps and tail connectors to the tap changer improves the short-circuit withstand capability of the leads, contributing to improved safety during operation of the oil-immersed distribution transformer. The three-phase high-voltage coil wiring structure has a reasonable layout, high feasibility for application, and strong practicality.

[0015] 2. By leading the corresponding taps on the three-phase high-voltage coils out from their front left end, the wiring structure of the three-phase high-voltage coils is concentrated at the front left end of the three-phase high-voltage coils. At the same time, the brackets used to support the leads are also concentrated at the front left end of the three-phase high-voltage coils, which greatly simplifies the bracket structure and reduces the amount of material used in the brackets. The number of fixing points for the leads on the brackets is greatly reduced, which helps to improve the construction efficiency of the wiring structure of the three-phase high-voltage coils of the oil-immersed distribution transformer.

[0016] 3. Several taps are clamped together by a set of clamping components and then joined to the tail connector. Connecting several taps together by a set of clamping components improves the ease of connection between the combined taps and tail connector and the lead wire.

[0017] 4. Each of the lead wires (lead one, lead two, lead three) and its corresponding clamping assembly is covered with an insulating layer. The insulating layer protects and insulates the lead wires, effectively preventing crimping damage during the process of the lead wires being fixed and clamped to the back side of the bracket by the clamping assembly, thus ensuring the safety of assembly and construction of the three-phase high-voltage coil wiring structure of the oil-immersed transformer of this utility model. Attached Figure Description

[0018] Figure 1 This is a front view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer, as described in the background art.

[0019] Figure 2 The image shows a left view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer (with the connectors at each end hidden).

[0020] Figure 3 This is a top view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer;

[0021] Figure 4 This is a front view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer according to this utility model;

[0022] Figure 5 This is a left view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer according to this utility model (lead wire 1 and each end connector are hidden);

[0023] Figure 6 This is a top view of the wiring structure of a three-phase high-voltage coil of an oil-immersed transformer according to this utility model.

[0024] In the diagram: Ⅰ. Phase A high-voltage coil; Ⅱ. Phase B high-voltage coil; Ⅲ. Phase C high-voltage coil; Ⅳ. Support; 1. Horizontal bar; 2. Vertical bar one; 3. Vertical bar two; 4. Vertical bar three; 5. Vertical bar four; 6. Vertical bar five; 7. Tap one; 8. Tap two; 9. Tap three; 10. Clamping assembly; 11. Channel steel support one; 12. Horizontal support leg; 13. Channel steel support two; 14. Clamping assembly; 15. Insulation layer; 7-1. Lead wire one; 8-1. Lead wire two; 9-1. Lead wire three; 10-1. U-shaped pressure block; 10-2. Screw; a. First end connector one; b. First end connector two; c. First end connector three; d. Zero phase first end connector; x. Tail end connector one; y. Tail end connector two; z. Tail end connector three. Detailed Implementation

[0025] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0026] Example

[0027] like Figures 4-6 As shown, this utility model is a three-phase high-voltage coil wiring structure for an oil-immersed transformer, including an A-phase high-voltage coil I, a B-phase high-voltage coil II, a C-phase high-voltage coil III, a zero-phase start-end connector d, and a support IV. The A-phase high-voltage coil I, B-phase high-voltage coil II, and C-phase high-voltage coil III are arranged horizontally in a straight line from left to right. The A-phase high-voltage coil I has a start-end connector a and a tail-end connector x at its start end. The B-phase high-voltage coil II has a start-end connector b and a tail-end connector y at its start end. The C-phase high-voltage coil III has a start-end connector c and a tail-end connector z at its start end. The support IV is laid longitudinally parallel to the front of the A-phase high-voltage coil I, B-phase high-voltage coil II, and C-phase high-voltage coil III. The zero-phase start-end connector d and start-end connector a... The first end connectors 2b and 3c are pressed and fixed on the upper rear side of the bracket IV. The left front end of the A-phase high-voltage coil I is provided with several taps 7, the left front end of the B-phase high-voltage coil II is provided with several taps 8, and the left front end of the C-phase high-voltage coil III is provided with several taps 9. The taps 7 and the tail end connector x are joined together and connected to the tap switch via a lead wire 7-1 extending upward to the left. The taps 8 and the tail end connector y are joined together and connected to the tap switch via a lead wire 8-1 extending upward to the left. The taps 9 and the tail end connector z are joined together and connected to the tap switch via a lead wire 9-1 extending upward to the left. Both the lead wires 8-1 and 9-1 are pressed and fixed on the rear side of the bracket IV.

[0028] Preferably, the support IV includes a horizontal bar 1 located horizontally above the front sides of phase A high-voltage coil I, phase B high-voltage coil II, and phase C high-voltage coil III. The horizontal bar 1 is fixed with three vertical bars extending downwards, one 2, one 3, and one 4, spaced apart from left to right. Vertical bar 2 is located at the front left end of phase A high-voltage coil I, vertical bar 3 is located at the front right end of phase A high-voltage coil I, and vertical bar 4 is located at the front... On the right side, the zero-phase first-end connector d, first-end connector a, first-end connector b, and first-end connector c are respectively vertically pressed and fixed to the rear side of the crossbar 1 from left to right by the pressing assembly 10. The second lead wire 8-1 is pressed and fixed to the rear side of the second vertical bar 3 and the first vertical bar 2 from right to left by the pressing assembly 10. The third lead wire 9-1 is pressed and fixed to the rear side of the third vertical bar 4, the second vertical bar 3, and the first vertical bar 2 from right to left by the pressing assembly 10.

[0029] More preferably, several of the taps 7 are clamped together by a set of clamping components 14 and then merged with the tail connector x.

[0030] More preferably, the clamping assembly 10 includes a U-shaped clamping block 10-1 and screws 10-2 passing through both ends of the U-shaped clamping block 10-1, and the U-shaped clamping block 10-1 is fixed to the bracket IV by the screws 10-2 passing through both ends;

[0031] The clamping assembly 14 includes two corresponding clamping plates that are fastened together and a bolt assembly that passes through both ends of the two clamping plates and locks them together.

[0032] More preferably, the right end of lead wire 2 8-1 and the middle part of lead wire 3 9-1 are pressed and fixed to the rear side of vertical rod 2 3 by the same set of pressing components 10, and the left end of lead wire 2 8-1 and the left end of lead wire 3 9-1 are pressed and fixed to the rear side of vertical rod 1 2 by the same set of pressing components 10.

[0033] More preferably, the lower end face of the crossbar 1 is fixed with a plurality of rearward extending channel steel supports 11 at intervals from left to right, and the lower ends of the vertical bars 1, 2, 3 and 4 are flush, and the lower ends of the three bars are all fixed with rearward extending channel steel supports 13.

[0034] More preferably, each of the lead wire 7-1, lead wire 8-1, lead wire 9-1 and the corresponding clamping assembly 10 is covered with an insulating layer 15.

[0035] This utility model discloses a three-phase high-voltage coil wiring structure for an oil-immersed transformer. By extending the corresponding taps on the three-phase high-voltage coils from their front left end, compared to extending them from the front right end, the length of the leads connecting the corresponding taps and tail connectors to the tap changer on the three-phase high-voltage coils is significantly shortened. This greatly reduces the amount of lead wire used and the corresponding lead wire costs, resulting in good economic benefits. The effectively shortened length of the leads connecting the corresponding taps and tail connectors to the tap changer improves the short-circuit withstand capability of the leads, contributing to improved safety during operation of the oil-immersed distribution transformer. The three-phase high-voltage coil wiring structure has a reasonable layout, high feasibility for application, and strong practicality.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A three-phase high-voltage coil wiring structure for an oil-immersed transformer, comprising a high-voltage coil (Ⅰ) of phase A, a high-voltage coil (Ⅱ) of phase B, a high-voltage coil (Ⅲ) of phase C, a zero-phase head joint (d) and a bracket (Ⅳ). The high-voltage coil (Ⅰ) of phase A, the high-voltage coil (Ⅱ) of phase B, and the high-voltage coil (Ⅲ) of phase C are arranged horizontally in a "one" shape from left to right. The head of the high-voltage coil (Ⅰ) of phase A is provided with a first head joint (a), and the tail is provided with a first tail joint (x). The head of the high-voltage coil (Ⅱ) of phase B is provided with a second head joint (b), and the tail is provided with a second tail joint (y). The head of the high-voltage coil (Ⅲ) of phase C is provided with a third head joint (c), and the tail is provided with a third tail joint (z). The bracket (Ⅳ) is longitudinally and parallelly laid on the front side of the high-voltage coil (Ⅰ) of phase A, the high-voltage coil (Ⅱ) of phase B, and the high-voltage coil (Ⅲ) of phase C. It is characterized in that, The zero-phase first-end connector (d), first-end connector one (a), first-end connector two (b), and first-end connector three (c) are pressed and fixed on the upper rear side of the bracket (Ⅳ). The front left end of the A-phase high-voltage coil (Ⅰ) is provided with several taps one (7), the front left end of the B-phase high-voltage coil (Ⅱ) is provided with several taps two (8), and the front left end of the C-phase high-voltage coil (Ⅲ) is provided with several taps three (9). Several of the taps one (7) and the tail end connector one (x) After merging, the lead wire 1 (7-1) extending to the upper left is connected to the tap switch. Several tap taps 2 (8) and tail connectors 2 (y) are connected to the tap switch after merging, and the lead wire 2 (8-1) extending to the upper left is connected to the tap switch. Several tap taps 3 (9) and tail connectors 3 (z) are connected to the tap switch after merging, and the lead wires 2 (8-1) and 3 (9-1) are both pressed and fixed on the rear side of the bracket (Ⅳ).

2. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 1, characterized in that, The support (Ⅳ) includes a horizontal bar (1) located horizontally above the front sides of the A-phase high-voltage coil (Ⅰ), the B-phase high-voltage coil (Ⅱ), and the C-phase high-voltage coil (Ⅲ). The horizontal bar (1) is fixed with three vertical bars (2), (3), and (4) extending downwards from left to right. The first vertical bar (2) is located at the front left end of the A-phase high-voltage coil (Ⅰ), the second vertical bar (3) is located at the front right end of the A-phase high-voltage coil (Ⅰ), and the third vertical bar (4) is located at the front right end of the B-phase high-voltage coil (Ⅱ). The zero-phase first-end connector (d), first-end connector one (a), first-end connector two (b), and first-end connector three (c) are vertically pressed and fixed on the rear side of the crossbar (1) from left to right by the pressing assembly (10). The second lead wire (8-1) is pressed and fixed on the rear side of the second vertical bar (3) and the first vertical bar (2) from right to left by the pressing assembly (10). The third lead wire (9-1) is pressed and fixed on the rear side of the third vertical bar (4), the second vertical bar (3), and the first vertical bar (2) from right to left by the pressing assembly (10).

3. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 2, characterized in that, Several of the aforementioned taps (7) are clamped together by a set of clamping components (14) and then merged with the aforementioned tail connector (x).

4. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 3, characterized in that, The clamping assembly (10) includes a U-shaped clamping block (10-1) and screws (10-2) passing through both ends of the U-shaped clamping block (10-1). The U-shaped clamping block (10-1) is fixed to the bracket (Ⅳ) by the screws (10-2) passing through both ends. The clamping assembly (14) includes two corresponding clamping plates that are fastened together and a bolt assembly that passes through both ends of the two clamping plates and locks them together.

5. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 4, characterized in that, The right end of lead wire 2 (8-1) and the middle part of lead wire 3 (9-1) are pressed and fixed to the rear side of vertical rod 2 (3) by the same set of pressing components (10), and the left end of lead wire 2 (8-1) and the left end of lead wire 3 (9-1) are pressed and fixed to the rear side of vertical rod 1 (2) by the same set of pressing components (10).

6. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 5, characterized in that, The lower end face of the crossbar (1) is fixed with a number of channel steel supports (11) extending backward from left to right. The lower ends of the vertical bars (2), (3) and (4) are flush, and the lower ends of the three bars are all fixed with channel steel supports (13) extending backward.

7. The three-phase high-voltage coil wiring structure of the oil-immersed transformer as described in claim 6, characterized in that, An insulating layer (15) is wrapped between the first lead (7-1), the second lead (8-1), the third lead (9-1) and the corresponding clamping assembly (10).

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