Transformer

Abstract

The utility model discloses a transformer, and relates to the technical field of transformers, the transformer comprises an oil tank and a transformer body arranged in the oil tank, the transformer body is provided with a first connecting terminal, a second connecting terminal and a third connecting terminal, the transformer further comprises a high-voltage main lead connected with the first connecting terminal, a high-voltage tapping lead connected with the second connecting terminal and a low-voltage wire outlet structure connected with the third connecting terminal. The transformer body is provided with a first side face and a second side face which are opposite, the first connecting terminal is arranged on the first side face, and the second connecting terminal is arranged on the second side face. According to the technical scheme, the first connecting terminal connected with the high-voltage main lead and the second connecting terminal connected with the high-voltage tapping lead are arranged on the two opposite side faces of the transformer body respectively, so that the high-voltage tapping lead and the high-voltage main lead are led out from the opposite sides; therefore, the risk of cross leading-out of the high-voltage tapping lead and the high-voltage main lead of the transformer is reduced, and the electrical distance between the high-voltage tapping lead and the high-voltage main lead is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of transformers, and in particular to a transformer. Background Art

[0002] The existing transformer has many crossover locations between the high-voltage tap leads and the high-voltage main leads. Not only is it difficult to ensure the electrical distance between the leads, which makes lead discharge prone, but the lead path is long, resulting in high wire usage costs. Utility Model Content

[0003] The main purpose of this application is to provide a transformer, aiming to reduce the risk of cross-leading of the high-voltage tap lead and the high-voltage main lead of the transformer.

[0004] To achieve the above-mentioned object, the transformer proposed in the present application includes an oil tank and a transformer body disposed in the oil tank, the transformer body being provided with a first connecting terminal, a second connecting terminal, and a third connecting terminal, the transformer further comprising a high-voltage main lead connected to the first connecting terminal, a high-voltage tap lead connected to the second connecting terminal, and a low-voltage outlet structure connected to the third connecting terminal;

[0005] The transformer body has a first side surface and a second side surface opposite to each other. The first connecting terminal is arranged on the first side surface, and the second connecting terminal is arranged on the second side surface.

[0006] In one embodiment, the third connection terminal is provided on the second side surface.

[0007] In one embodiment, the first connection terminal is disposed close to the upper end of the transformer body, the second connection terminal is disposed away from the lower end of the transformer body, and the third connection terminal is disposed close to the lower end of the transformer body.

[0008] In one embodiment, the transformer further includes a fuse, a load switch, and a tap changer installed on the transformer body, wherein the fuse, the load switch, and the tap changer are all arranged near the upper end of the transformer body, the high-voltage main lead is connected to the fuse and the load switch, and the high-voltage tap lead is connected to the tap changer.

[0009] In one embodiment, the transformer body further has a third side surface connecting the first side surface and the second side surface, and the load switch and the tap changer are arranged on the third side surface.

[0010] In one embodiment, the load switch is disposed on the third side surface close to the first side surface, and the tap changer is disposed on the third side surface close to the second side surface.

[0011] In one embodiment, the transformer further includes a high-voltage bushing, which is installed on the outside of the oil tank and located on the side where the first side is located. The high-voltage bushing is arranged close to the upper end of the oil tank and is connected to the high-voltage main lead.

[0012] In one embodiment, the transformer further includes a low-voltage bushing, which is installed on the outside of the oil tank and located on the side where the second side is located. The low-voltage bushing is arranged close to the lower end of the oil tank and is connected to the low-voltage outlet structure.

[0013] In one embodiment, the transformer further includes an outlet box and a fixing member, the outlet box is arranged between the oil tank and the low-voltage bushing, the low-voltage outlet structure includes a first connecting section arranged in the oil tank, and a second connecting section arranged in the outlet box, the second connecting section is connected to the low-voltage bushing, and the fixing member is connected to the outlet box or the oil tank and clamps the second connecting section.

[0014] In one embodiment, the transformer further includes a first clamping member and a first wire fixing clamp, wherein the first clamping member is mounted on the first side surface and is provided at one end close to the first connecting terminal, and the first wire fixing clamp is connected to the first clamping member and clamps the high-voltage main lead.

[0015] In one embodiment, the transformer further includes a second clamping member, a second wire fixing clamp and a fixing plate, wherein the second wire fixing clamp is mounted on the second side surface and is provided at one end close to the second connecting terminal, the fixing plate is mounted on the second clamping member, and the first wire fixing clamp is connected to the fixing plate and clamps the high-voltage tap lead.

[0016] In one embodiment, the transformer further includes a third clamping member and a third wire fixing clamp, wherein the third clamping member is mounted on the second side surface and is disposed at an end away from the second connecting terminal, and the third wire fixing clamp is connected to the third clamping member and clamps the low-voltage outgoing line structure.

[0017] In one embodiment, the low-voltage outlet structure is configured as a low-voltage copper busbar.

[0018] The technical solution of this application, by placing the first connection terminal for the high-voltage main lead and the second connection terminal for the high-voltage tap lead on opposite sides of the transformer body, allows the high-voltage tap lead and the high-voltage main lead to exit from opposite sides. This reduces the risk of cross-leading of the high-voltage tap lead and the high-voltage main lead of the transformer, ensures the electrical distance between the high-voltage tap lead and the high-voltage main lead, and improves the safety of the transformer. At the same time, it reduces the lead routing path and the width of the fuel tank, thereby reducing the overall cost of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0020] Figure 1 A front view of an embodiment of a transformer provided in this application;

[0021] Figure 2 A side view of an embodiment of a transformer provided in this application;

[0022] Figure 3 A rear view of an embodiment of a transformer provided in this application;

[0023] Figure 4 This is a top view of an embodiment of a transformer provided in this application.

[0024] Description of Figure Numbers:

[0025] 10. Transformer; 100. Oil tank; 200. Transformer body; 310. High-voltage main lead; 320. High-voltage tap lead; 330. Low-voltage outlet structure; 410. Fuse; 420. Load switch; 430. Tap changer; 510. High-voltage bushing; 520. Low-voltage bushing; 610. Outlet box; 620. Fixing member; 710. First clamping member; 720. First wire clamp; 810. Second clamping member; 820. Second wire clamp; 830. Fixing plate; 910. Third clamping member; 920. Third wire clamp.

[0026] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0028] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] The present application proposes a transformer 10 .

[0031] See also Figures 1 to 3 In one embodiment of the present application, the transformer 10 includes an oil tank 100 and a transformer body 200 arranged in the oil tank 100. The transformer body 200 is provided with a first connection terminal, a second connection terminal, and a third connection terminal. The transformer 10 also includes a high-voltage main lead 310 connected to the first connection terminal, a high-voltage tap lead 320 connected to the second connection terminal, and a low-voltage outlet structure 330 connected to the third connection terminal; the transformer body 200 has a first side surface and a second side surface opposite to each other, the first connection terminal is provided on the first side surface, and the second connection terminal is provided on the second side surface.

[0032] Specifically, the oil tank 100 serves as the outer shell of the transformer 10 and is generally made of metal. It has good protective properties and can be dustproof, waterproof, and prevent small animals from entering. The oil tank 100 is used to store an insulating medium, which can provide cooling and insulation for the internal components of the transformer 10. The transformer body 200 includes an iron core and a winding wound on the iron core. The iron core is generally made of stacked silicon steel sheets to reduce eddy current losses. The winding includes a high-voltage winding and a low-voltage winding. After the external current flows into the low-voltage winding of the transformer 10, it is converted into a high-voltage current through electromagnetic induction. The converted high-voltage current is output through the high-voltage winding, thereby realizing high-voltage conversion; or after the external current flows into the high-voltage winding of the transformer 10, it is converted into a low-voltage current through electromagnetic induction. The converted low-voltage current is output through the low-voltage winding, thereby realizing low-voltage conversion.

[0033] The transformer body 200 is provided with a first connection terminal, a second connection terminal, and a third connection terminal. The first connection terminal can be a winding joint of the high-voltage winding, or a connector such as an electrode sheet or a probe connected to the high-voltage winding. The second connection terminal can be a tap of the high-voltage winding. The tap allows the transformer 10 to operate at different turns ratios, with each tap corresponding to a different number of winding turns, and thus corresponding to a different transformation ratio (i.e., the ratio of input voltage to output voltage), to maintain the stability of the output voltage when the load changes or the grid voltage fluctuates. The second connection terminal can also be a connector such as an electrode sheet or a probe connected to the high-voltage winding. The third connection terminal can be a winding joint of the low-voltage winding, or a connector such as an electrode sheet or a probe connected to the low-voltage winding.

[0034] The low-voltage outgoing line structure 330 is used to connect the low-voltage winding of the transformer 10 with the low-voltage end of the external low-voltage power system to introduce low-voltage current into the low-voltage winding of the transformer 10; the high-voltage main lead 310 is used to connect the high-voltage winding of the transformer 10 with the external high-voltage power system to transmit the high-voltage electric energy converted by the transformer 10 to the next power distribution link. Of course, the high-voltage current of the external high-voltage power system can also be introduced into the high-voltage winding of the transformer 10 through the high-voltage main lead 310, converted into low-voltage current through electromagnetic induction, and then led out to the external low-voltage equipment or system through the low-voltage outgoing line structure 330. The high-voltage tap lead 320 is a wire connected to different taps of the high-voltage winding inside the transformer 10.

[0035] The first connection terminal is located on a first side surface of the transformer body 200, and the second connection terminal is located on a second side surface opposite the first side surface. This means that the high-voltage tap lead 320 and the high-voltage main lead 310 are connected on opposite sides. This prevents the high-voltage tap lead 320 and the high-voltage main lead 310 from crossing each other when they are drawn out from the transformer body 200 on the same side. This effectively ensures the electrical distance between the high-voltage tap lead 320 and the high-voltage main lead 310, reducing the risk of discharge between the high-voltage tap lead 320 and the high-voltage main lead 310. Furthermore, after the high-voltage tap lead 320 and the high-voltage main lead 310 are drawn out from opposite sides of the transformer body 200, they can each be connected to the corresponding electrical component nearby. This not only further reduces the risk of crossing between the two, but also reduces the paths required for each lead, thereby reducing lead costs. Furthermore, the high-voltage tap lead 320 and the high-voltage main lead 310 of the conventional transformer 10 cross and lead out on the same side. To ensure electrical safety between the high-voltage tap lead 320 and the high-voltage main lead 310, a certain electrical distance must be maintained between the high-voltage tap lead 320 and the high-voltage main lead 310 at the intersection. This electrical distance results in a larger width dimension of the oil tank 100. In contrast, the transformer 10 proposed in this application has the high-voltage tap lead 320 and the high-voltage main lead 310 exiting from opposite sides, reducing the intersection between the high-voltage tap lead 320 and the high-voltage main lead 310. This reduces the electrical distance at the intersection between the high-voltage tap lead 320 and the high-voltage main lead 310, thereby shortening the width dimension of the oil tank 100. This reduces the steel plate of the oil tank 100 and the oil consumption of the transformer 10, thereby reducing the overall cost of the transformer 10.

[0036] The technical solution of this application arranges the first connection terminal for connecting the high-voltage main lead 310 and the second connection terminal for connecting the high-voltage tap lead 320 on opposite sides of the transformer body 200, so that the high-voltage tap lead 320 and the high-voltage main lead 310 are connected on opposite sides. This reduces the risk of cross-leading of the high-voltage tap lead 320 and the high-voltage main lead 310 of the transformer 10, ensures the electrical distance between the high-voltage tap lead 320 and the high-voltage main lead 310, and improves the safety of the transformer 10. At the same time, the wiring path of the leads and the width of the oil tank 100 are reduced, thereby reducing the overall cost of the transformer 10.

[0037] In one embodiment, see Figure 1 and Figure 2 , the third connecting terminal is arranged on the second side surface.

[0038] The third connection terminal is located on the second side surface, so that the low-voltage outlet structure 330, high-voltage tap lead 320, and high-voltage main lead 310 are distributed on both sides of the transformer body 200 in the same direction, thereby reducing the space occupied in other directions of the transformer body 200. The high-voltage main lead 310 is used at a higher voltage level, and the electrical distance between the low-voltage outlet structure 330 and the high-voltage main lead 310 is generally required to be higher. By arranging both the second and third connection terminals on the second side surface, the low-voltage outlet structure 330 and the high-voltage tap lead 320 are connected to the same side, which helps to ensure the electrical distance between the low-voltage outlet structure 330 and the high-voltage main lead 310.

[0039] In other embodiments, the third connection terminal may also be provided on the first side surface, that is, the low-voltage outlet structure 330 and the high-voltage main lead 310 are outlets on the same side; the third connection terminal may also be provided on other sides of the transformer body 200 other than the first side surface and the second side surface, and the low-voltage outlet structure 330 is neither outlets on the same side as the high-voltage main lead 310 nor outlets on the same side as the high-voltage tap lead 320, that is, the low-voltage outlet structure 330, the high-voltage tap lead 320 and the high-voltage main lead 310 are respectively led out from three different sides of the transformer body 200.

[0040] In one embodiment, see Figures 1 to 3 The first connection terminal is arranged close to the upper end of the transformer body 200 , the second connection terminal is arranged away from the lower end of the transformer body 200 , and the third connection terminal is arranged close to the lower end of the transformer body 200 .

[0041] The first connection terminal is positioned near the upper end of the transformer body 200, above the middle of the first side surface, to ensure sufficient electrical clearance and creepage distance between the high-voltage main lead 310 and the ground. Multiple second connection terminals are provided, and they can be distributed above the middle of the second side surface, or near the middle of the second side surface, to ensure sufficient electrical clearance and creepage distance between the high-voltage tap lead 320 and the ground. Simultaneously, the third connection terminal is positioned near the lower end of the transformer body 200, allowing for zoned distribution of the second and third connection terminals. This reduces the risk of crossover between the low-voltage outlet structure 330 and the high-voltage tap lead 320, effectively ensuring electrical distance between the low-voltage outlet structure 330 and the high-voltage tap lead 320. After the low-voltage outgoing line structure 330 is led out from the third connection terminal, it is directly led out from the lower end of the transformer body 200 to the outside of the oil tank 100 to be connected to the inverter interface. The wiring path of the low-voltage outgoing line structure 330 is short, thereby reducing the usage of the low-voltage outgoing line structure 330 and reducing the cost of the low-voltage outgoing line structure 330.

[0042] In other embodiments, the third connection terminal may also be disposed near the upper end or the middle of the transformer body 200 .

[0043] In one embodiment, see Figure 2 and Figure 3 The transformer 10 also includes a fuse 410, a load switch 420 and a tap changer 430 installed on the transformer body 200. The fuse 410, the load switch 420 and the tap changer 430 are all arranged near the upper end of the transformer body 200. The high-voltage main lead 310 connects the fuse 410 and the load switch 420, and the high-voltage tap lead 320 is connected to the tap changer 430.

[0044] The fuse 410 is primarily used to protect the transformer 10 from overload and short circuit. The fuse 410 may be a full-range protection fuse, a current-limiting fuse, a high-voltage fuse, or the like. The load switch 420 is primarily used to open or close the circuit under load. The load switch 420 may be an oil-immersed load switch, a vacuum load switch, or an SF6 load switch (Gas-Insulated Load Switches). The tap changer 430 is used to adjust the voltage ratio when the transformer 10 is unloaded. The tap changer 430 may be an off-excitation tap changer, an on-load tap changer, or a vacuum tap changer.

[0045] The first and second connection terminals are both located near the top of the transformer body 200. The fuse 410, load switch 420, and tap changer 430 are also located near the top of the transformer body 200. This not only ensures sufficient electrical clearance and creepage distance between the fuse 410, load switch 420, and tap changer 430 and the ground, but also allows the high-voltage main lead 310 to be directly connected to the fuse 410 and load switch 420 after being led out of the first connection terminal. The high-voltage tap lead 320 can also be directly connected to the tap changer 430 after being led out of the second connection terminal. This avoids excessively long routing paths for the high-voltage main lead 310 and high-voltage tap lead 320, reduces the number of high-voltage main leads 310 and high-voltage tap leads 320, and lowers lead cost. Furthermore, the proximity of the fuse 410, load switch 420, and tap changer 430 to the top of the transformer body 200 facilitates operation, replacement, and maintenance.

[0046] In other embodiments, the fuse 410 , the load switch 420 and the tap changer 430 may also be arranged near the middle or lower middle portion of the transformer body 200 , or may be arranged partially near the upper end of the transformer body 200 and partially near the middle or lower middle portion of the transformer body 200 .

[0047] In one embodiment, see Figure 2The transformer body 200 further has a third side surface connecting the first side surface and the second side surface, and the load switch 420 and the tap changer 430 are arranged on the third side surface.

[0048] Load switch 420 and tap changer 430 require regular operation. Positioning them on the same side facilitates adjustment, maintenance, and inspection by operators, ensuring quick access to maintenance when necessary. Fuse 410 can be positioned on the first side, allowing the high-voltage main lead 310 to be directly connected to fuse 410 after exiting the first connection terminal. Furthermore, placing fuse 410 on different sides from load switch 420 and tap changer 430 prevents confusion during operation.

[0049] In other embodiments, the load switch 420 and the tap changer 430 may also be disposed on the upper end surface of the transformer body 200; the load switch 420 and the tap changer 430 may also be disposed on two different surfaces, such as the load switch 420 is disposed on the first side surface and the tap changer 430 is disposed on the second side surface, or one of the load switch 420 and the tap changer 430 is disposed on the upper end surface of the transformer body 200 and the other is disposed on the third side surface, etc.

[0050] In one embodiment, see Figure 2 The load switch 420 is arranged on the third side surface close to the first side surface, and the tap changer 430 is arranged on the third side surface close to the second side surface.

[0051] The high-voltage main lead 310 can be directly connected to the load switch 420 from the first side without having to be routed to the end close to the second side. The high-voltage tap lead 320 can be directly connected to the tap switch 430 from the second side without having to be routed to the end close to the first side. This not only reduces the routing paths of the high-voltage main lead 310 and the high-voltage tap lead 320, thereby reducing the usage of the high-voltage main lead 310 and the high-voltage tap lead 320, but also ensures that the routing layout of the high-voltage main lead 310 and the high-voltage tap lead 320 is reasonable, avoiding crossing and confusion.

[0052] In other embodiments, the load switch 420 and the tap changer 430 may also be arranged in an upper and lower arrangement.

[0053] In one embodiment, see Figure 2 and Figure 4 The transformer 10 also includes a high-voltage bushing 510, which is installed on the outside of the oil tank 100 and is located on the side where the first side is located. The high-voltage bushing 510 is arranged close to the upper end of the oil tank 100 and is connected to the high-voltage main lead 310.

[0054] The high-voltage bushing 510 connects the high-voltage main lead 310 to the external high-voltage power grid. The high-voltage bushing 510 features high electrical insulation to prevent leakage or short circuits during high-voltage current transmission. It is typically made of porcelain or synthetic materials to enhance its insulation and mechanical strength. The high-voltage bushing 510 is installed on the outside of the fuel tank 100, on the side of the first side. The high-voltage main lead 310 is primarily located on the first side. The routing of the high-voltage main lead 310 is optimized, reducing the amount of high-voltage main lead 310 used and preventing crossover and confusion between the high-voltage main lead 310 and the high-voltage tap lead 320. Furthermore, the high-voltage bushing 510 is positioned near the upper end of the fuel tank 100 to ensure sufficient electrical clearance between the high-voltage bushing 510 and the ground. The routing path of the high-voltage main lead 310 includes the first connecting terminal, the fuse 410, the load switch 420, and the high-voltage bushing 510.

[0055] In one embodiment, see Figure 2 and Figure 4 The transformer 10 also includes a low-voltage bushing 520, which is installed on the outside of the oil tank 100 and is located on the side where the second side is located. The low-voltage bushing 520 is arranged near the lower end of the oil tank 100 and is connected to the low-voltage outgoing line structure 330.

[0056] The low-voltage bushing 520 is used to connect the low-voltage outlet structure 330 and the external low-voltage power grid. Compared with the high-voltage bushing 510, the insulation requirements of the low-voltage bushing 520 are relatively low. The low-voltage bushing 520 can also use porcelain or synthetic materials, but its thickness and size are usually smaller than the high-voltage bushing 510. The low-voltage bushing 520 is installed on the outside of the oil tank 100 on the side where the second side is located. After the low-voltage outlet structure 330 is led out from the first side, it is directly connected to the low-voltage bushing 520. The wiring path of the low-voltage outlet structure 330 is short, which not only reduces the use of the low-voltage outlet structure 330, but also avoids the low-voltage outlet structure 330 from crossing and confusing with the high-voltage main lead 310 and the high-voltage tap lead 320. The low-voltage bushing 520 is set near the lower end of the oil tank 100 to facilitate connection to downstream electrical equipment (such as an inverter).

[0057] In one embodiment, see Figure 2 and Figure 4 The transformer 10 also includes an outlet box 610 and a fixing member 620. The outlet box 610 is arranged between the oil tank 100 and the low-voltage bushing 520. The low-voltage outlet structure 330 includes a first connecting section arranged in the oil tank 100 and a second connecting section arranged in the outlet box 610. The second connecting section is connected to the low-voltage bushing 520. The fixing member 620 is connected to the outlet box 610 or the oil tank 100 and clamps the second connecting section.

[0058] The low-voltage bushing 520 is installed outside the fuel tank 100 via an outlet box 610, facilitating connection between the low-voltage outlet structure 330 and the low-voltage bushing 520. Securing the low-voltage outlet structure 330 within the outlet box 610 with a fixing member 620 prevents vibration of the low-voltage outlet structure 330 during operation of the transformer 10, which could cause a loose connection between the low-voltage outlet structure 330 and the third connection terminal or a partial short circuit in the low-voltage outlet structure 330. The fixing member 620 can be installed on the outlet box 610 or fuel tank 100 by welding or fastener connection. The fixing member 620 can be configured as a wire clamp.

[0059] In one embodiment, see Figure 3 The transformer 10 also includes a first clamping member 710 and a first wire clamp 720. The first clamping member 710 is installed on the first side and is provided at one end close to the first connecting terminal. The first wire clamp 720 is connected to the first clamping member 710 and clamps the high-voltage main lead 310.

[0060] The iron core of the transformer body 200 is typically constructed from multiple stacked silicon steel sheets. The first clamping member 710 is used to clamp these sheets together. The first wire clamp 720 is located on the first clamping member 710 and clamps the high-voltage main lead 310. This effectively secures the high-voltage main lead 310, preventing displacement of the high-voltage main lead 310 due to vibration or other external forces, thereby reducing the risk of electrical failure. Multiple first wire clamps 720 can be arranged, depending on the number and routing of the high-voltage main leads 310, to improve their securement.

[0061] In one embodiment, see Figure 1 The transformer 10 also includes a second clamping member 810, a second wire fixing clamp 820 and a fixing plate 830. The second wire fixing clamp 820 is installed on the second side and is provided at one end close to the second connecting terminal. The fixing plate 830 is installed on the second clamping member 810. The first wire fixing clamp 720 is connected to the fixing plate 830 and clamps the high-voltage tap lead 320.

[0062] The second clamping member 810 is used to clamp multiple silicon steel sheets and, together with the first clamping member 710, clamps the upper end of the transformer body 200. A fixing plate 830 is secured to the second clamping member 810 by welding or integral molding. The second clamping member 810 is removably mounted on the fixing plate 830 and clamps the high-voltage tap lead 320, effectively securing the high-voltage tap lead 320 and preventing displacement due to vibration or other external forces, thereby reducing the risk of electrical failure. Multiple fixing plates 830 and second wire clamps 820 can be arranged, depending on the number and routing of the high-voltage tap leads 320, to improve their securement.

[0063] In one embodiment, see Figure 1 and Figure 2 The transformer 10 also includes a third clamping member 910 and a third wire clamp 920. The third clamping member 910 is installed on the second side and is located at an end away from the second connecting terminal. The third wire clamp 920 is connected to the third clamping member 910 and clamps the low-voltage outgoing line structure 330.

[0064] The third clamping member 910 is used to clamp multiple silicon steel sheets to secure the lower end of the transformer body 200. The third wire clamp 920 is mounted on the third clamping member 910 and clamps the low-voltage outlet structure 330. This effectively secures the low-voltage outlet structure 330, preventing displacement due to vibration or other external forces, thereby reducing the risk of electrical failure. Multiple third wire clamps 920 can be arranged, depending on the number of low-voltage outlet structures 330 and their routing paths, to improve securing the low-voltage outlet structure 330.

[0065] In one embodiment, the low-voltage outgoing line structure 330 is configured as a low-voltage copper busbar.

[0066] The low-voltage copper busbar has good mechanical strength and can withstand large current loads without deformation or breakage. The low-voltage copper busbar can be cut, bent, or processed as needed. The low-voltage copper busbar can be connected to the third connection terminal by bolting, welding, or other methods to form a reliable electrical connection.

[0067] In other embodiments, the low-voltage outlet structure 330 may also be configured as a low-voltage lead.

[0068] The above description is merely an exemplary embodiment of the present application and does not limit the patent scope of the present application. Any equivalent structural transformation made using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A transformer, characterized in that: The transformer includes an oil tank and a transformer body disposed in the oil tank, the transformer body being provided with a first connecting terminal, a second connecting terminal, and a third connecting terminal, and the transformer further includes a high-voltage main lead connected to the first connecting terminal, a high-voltage tap lead connected to the second connecting terminal, and a low-voltage outlet structure connected to the third connecting terminal; The transformer body has a first side surface and a second side surface opposite to each other. The first connecting terminal is arranged on the first side surface, and the second connecting terminal is arranged on the second side surface.

2. The transformer according to claim 1, characterized in that The third connecting terminal is disposed on the second side surface.

3. The transformer according to claim 2, characterized in that The first connection terminal is arranged close to the upper end of the transformer body, the second connection terminal is arranged away from the lower end of the transformer body, and the third connection terminal is arranged close to the lower end of the transformer body.

4. The transformer according to claim 3, characterized in that The transformer also includes a fuse, a load switch and a tap changer installed on the transformer body. The fuse, the load switch and the tap changer are all arranged near the upper end of the transformer body. The high-voltage main lead is connected to the fuse and the load switch, and the high-voltage tap lead is connected to the tap changer.

5. The transformer according to claim 4, characterized in that The transformer body further has a third side surface connecting the first side surface and the second side surface, and the load switch and the tap changer are arranged on the third side surface.

6. The transformer according to claim 5, characterized in that The load switch is arranged on the third side surface close to the first side surface, and the tap changer is arranged on the third side surface close to the second side surface.

7. The transformer according to claim 3, characterized in that The transformer further includes a high-voltage bushing, which is installed on the outside of the oil tank and located on the side where the first side is located. The high-voltage bushing is arranged close to the upper end of the oil tank and is connected to the high-voltage main lead.

8. The transformer according to claim 3, wherein: The transformer also includes a low-voltage bushing, which is installed on the outside of the oil tank and located on the side where the second side is located. The low-voltage bushing is arranged close to the lower end of the oil tank and is connected to the low-voltage outlet structure.

9. The transformer according to claim 8, characterized in that The transformer also includes an outlet box and a fixing member. The outlet box is arranged between the oil tank and the low-voltage bushing. The low-voltage outlet structure includes a first connecting section arranged in the oil tank and a second connecting section arranged in the outlet box. The second connecting section is connected to the low-voltage bushing. The fixing member is connected to the outlet box or the oil tank and clamps the second connecting section.

10. The transformer according to claim 1, wherein: The transformer further includes a first clamping member and a first wire fixing clamp, wherein the first clamping member is mounted on the first side surface and is provided at one end close to the first connecting terminal, and the first wire fixing clamp is connected to the first clamping member and clamps the high-voltage main lead; And / or, the transformer further comprises a second clamping member, a second wire fixing clamp and a fixing plate, wherein the second wire fixing clamp is mounted on the second side surface and is provided at one end close to the second connecting terminal, the fixing plate is mounted on the second clamping member, and the first wire fixing clamp is connected to the fixing plate and clamps the high-voltage tap lead; And / or, the transformer further includes a third clamping member and a third wire fixing clamp, the third clamping member is mounted on the second side surface and is provided at an end away from the second connecting terminal, the third wire fixing clamp is connected to the third clamping member and clamps the low-voltage outgoing line structure; And / or, the low-voltage outlet structure is configured as a low-voltage copper busbar.

Images