Electromagnetic voltage transformer

Abstract

The electromagnetic voltage transformer relates to the high-voltage measurement technical field of power systems and comprises a transformer main body, a docking base arranged below the transformer main body, two docking plug frames fixedly connected below the transformer main body, inner positioning folding edges arranged in the two docking plug frames, and unlocking assemblies arranged in the two docking plug frames. Through the arrangement of the clamping assembly, when the clamping assembly clamps the copper bar by pushing the guide assembly, the reaction force can extrude the second elastic member, so that the piston extrudes the gas in the sliding groove. When the voltage transformer vibrates, the vibration frequency can be offset by the elastic force of the second elastic member to prevent loosening of the clamping assembly. When the voltage rises and the current increases to generate heat, the gas in the sliding groove will expand after being heated, so that the piston moves in the direction of the copper bar and extrudes the second elastic member for adjustment, thereby further improving the damping effect and improving the detection efficiency of the power system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of high-voltage measurement of power systems, and particularly relates to an electromagnetic voltage transformer. BACKGROUND

[0002] The voltage transformer is commonly used for high-voltage measurement and current measurement in the power system, and the working principle of the voltage transformer is based on the electromagnetic induction principle. When high voltage is applied to the primary winding, magnetic flux is generated in the iron core. According to Faraday's law of electromagnetic induction, the induced electromotive force is proportional to the rate of change of the magnetic flux. Since the number of turns of the secondary winding is much less than that of the primary winding, the voltage in the secondary winding will be significantly reduced. The turns ratio determines the voltage conversion ratio. According to the voltage transformation ratio of the voltage transformer and the values measured by the voltmeter and ammeter, the current or voltage in the measured load can be calculated. The open-type voltage transformer is a special electrical measuring device. By adjusting its structure to enclose the measured copper bar, it can generate electromagnetic induction to realize current detection.

[0003] A kind of open-type current transformer convenient to install is disclosed in Chinese patent with application number CN201910536487.8, which includes a transformer body and an elastic band. The transformer body is divided into two parts, and a through hole is left between the upper half and the lower half of the transformer body for the passage of wires. A fixing member is provided between the upper half and the lower half to open or close the through hole. The elastic band is arranged on one side of the lower half and is wrapped around the bottom end of the lower half and detachably connected to the other side of the lower half. A detachable part is provided at the detachable connection between the elastic band and the lower half. The open-type current transformer convenient to install provided by the present application can be fixed on the mounting plate by wrapping the elastic band around the bottom end of the transformer body from one side and fixing it to the other side of the transformer body. The mounting plate is located between the elastic band and the transformer body, thereby fixing the transformer body on the mounting plate and facilitating the installation between the transformer and the mounting plate, reducing the time required for installing the transformer on the mounting plate.

[0004] Although the current transformer in the present application can reduce the time required for installing the transformer on the mounting plate, the open-type electromagnetic transformer needs to be disassembled and fitted around the measured copper bar during installation. The interface between the transformer body and the base is generally connected by screws, bolts and other connecting members. During disassembly and connection, the screws, bolts and other connecting members need to be disassembled using a screwdriver before the open-type transformer can be separated. The disassembly and installation method is not quick enough, which affects the maintenance and detection efficiency of the power system. In addition, during the normal operation of the voltage transformer, electromagnetic vibrations may occur due to electromagnetic conversion, especially when the voltage increases and the current increases, the vibrations are more significant. Long-term electromagnetic vibrations may cause the fixed point to fall off, which may produce abnormal noise due to vibrations, affecting the detection efficiency of the power system. SUMMARY

[0005] The electromagnetic voltage transformer disclosed in the present application is used to solve the problem that the installation, dismounting and mounting of the open electromagnetic voltage transformer are not quick enough, which affects the maintenance and detection efficiency of the power system, and the electromagnetic vibration sound generated during the normal operation of the voltage transformer may produce abnormal sound, which affects the detection efficiency of the power system.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an electromagnetic voltage transformer, comprising a transformer main body, a docking base is arranged below the transformer main body, two docking plug-in frames are fixedly connected below the transformer main body, an inner positioning folding edge is arranged in each of the two docking plug-in frames, a plurality of docking plug-in ports corresponding in number and position to the docking plug-in frames are arranged at the upper end of the docking base, and an unlocking assembly is arranged in each of the two docking plug-in ports.

[0007] The unlocking assembly comprises an unlocking top column in sliding connection with the docking base, one end of the unlocking top column is located in the interior of the docking plug-in port and is fixedly connected with a limiting hook plate, and the other end of the unlocking top column is located outside the docking base.

[0008] Preferably, the limiting hook plate is in sliding connection with the interior of the docking plug-in port, a first elastic member is sleeved on the unlocking top column, one end of the first elastic member is connected with the limiting hook plate, the other end of the first elastic member is connected with the inner wall of the docking plug-in port, and a hook plate wedge surface is arranged at the upper edge of the limiting hook plate.

[0009] Preferably, two groups of symmetrical guiding assemblies are arranged on both sides of the transformer main body along the length of the copper bar, and a clamping assembly for clamping the transformer on the copper bar is arranged on each of the guiding assemblies.

[0010] Preferably, the clamping assembly comprises two pistons, two sliding grooves are arranged at one end of the sliding plate close to the copper bar, the two pistons are respectively in sliding connection with the corresponding sliding grooves, a fixed column is in sliding connection with the interior of each of the sliding grooves at the side close to the copper bar of the corresponding piston, a second elastic member is connected between each of the pistons and the corresponding fixed column, and a thermal expansion gas is arranged between the interior of each of the sliding grooves and the side away from the copper bar of the corresponding piston.

[0011] Preferably, a copper bar pressing plate is fixedly connected to one end of the fixed column away from the piston, two gasket plug-in ports are arranged on the side of the copper bar pressing plate close to the copper bar, and an elastic gasket is arranged in the interior of each of the gasket plug-in ports.

[0012] Preferably, the guide assembly comprises a guide frame, both ends of the guide frame are fixedly connected on one side of the transformer body, a first socket is arranged in the guide frame, and a second socket is arranged at both ends of the guide frame.

[0013] Preferably, a sliding plate is slidably connected between the transformer body and the guide frame, a plurality of top plate wedges are arranged on the side, away from the transformer body, of the sliding plate, a directional lock plate is slidably connected in the first socket, a plurality of lock plate wedges are arranged on the end, close to the sliding plate, of the directional lock plate, and the top plate wedges and the lock plate wedges can be engaged with each other.

[0014] Preferably, lock plate wedge grooves are arranged on the side, close to the guide frame, of both ends of the directional lock plate, an installation groove is arranged in each lock plate wedge groove, a third elastic member is arranged in each installation groove, one end of each third elastic member is connected with the corresponding installation groove, and the other end of each third elastic member is connected with the guide frame.

[0015] Preferably, a trigger pressing plate is slidably connected in the second socket, a limiting groove is arranged on the side of the trigger pressing plate, a sliding wedge groove is arranged on the end, close to the directional lock plate, of the trigger pressing plate, and the sliding wedge groove and the lock plate wedge groove are slidably matched.

[0016] A use method of an electromagnetic voltage transformer, comprising the following steps:

[0017] S1, separating the transformer body from the butt joint base by pressing the unlocking assembly;

[0018] S2, sleeving the transformer body on the copper bar;

[0019] S3, fixing the transformer on the copper bar by the guide assembly and the clamping assembly;

[0020] S4, fixing the butt joint base under the transformer body by the unlocking assembly.

[0021] The beneficial effects of the present application are:

[0022] 1、The present application is through the setting of unlocking assembly, when the mutual inductor body and the docking base are docked, the docking plug-in frame is plugged in the docking socket, the limiting hook plate is docked with the inner positioning folded edge, so that the mutual inductor body and the docking base cannot be separated, when the mutual inductor body and the docking base are separated, the unlocking top column can be pressed to move the limiting hook plate inward, so that the limiting hook plate is separated from the inner positioning folded edge, and then the mutual inductor body can be separated from the docking base, the mutual inductor body and the docking base are quickly separated, without additional tools, the problem that the screwdriver is needed to disassemble the connecting members such as screws and bolts to separate the mouth type mutual inductor when the traditional voltage mutual inductor is disassembled and docked, the disassembly and installation mode is not fast enough, and the maintenance and detection efficiency of the power system is affected is solved;

[0023] 2、The present application is through the setting of the guide assembly and the clamping assembly, when the voltage mutual inductor and the copper bar are fixedly connected, the sliding plate can be pushed by external force, due to the wedge tooth structure of the top plate wedge tooth and the lock plate wedge tooth, the sliding plate can be pushed towards the center of the mutual inductor body, so that the elastic gasket is tightly attached to the outer surface of the copper bar, and due to the wedge tooth structure of the top plate wedge tooth and the lock plate wedge tooth, the sliding plate cannot move away from the center of the mutual inductor body, thereby realizing the one-way locking function, when separation is needed, the two trigger plates can be pinched to move the trigger plate towards the center of the directional lock plate, so that the lock plate wedge tooth is separated from the top plate wedge tooth, and the locking of the sliding plate is released, the sliding plate can be moved left and right to adjust the clamping of the copper bar, the fixing and disassembly of the copper bar are improved, the voltage mutual inductor can be installed without tools, the installation convenience of the voltage mutual inductor and the detection and maintenance efficiency of the power system are improved;

[0024] 3、The present application is through the setting of the clamping assembly, when the guide assembly is pushed to clamp the copper bar by the clamping assembly, the reaction force can extrude the second elastic member through the fixed column on the copper bar pressing plate, so that the piston moves in the sliding groove and extrudes the gas in the sliding groove, when the voltage mutual inductor vibrates, the vibration frequency can be offset by the elastic force of the second elastic member, so as to prevent the loosening of the clamping assembly, when the voltage of the copper bar increases and the current increases during use, the voltage mutual inductor will generate heat along with the voltage increase and current increase of the copper bar, when the gas in the sliding groove is heated, it will expand and move towards the copper bar direction, extruding the second elastic member, the elastic force of the second elastic member is adjusted, and the vibration effect is further improved, so as to avoid abnormal noise caused by vibration and improve the detection efficiency of the power system. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic diagram of the present application;

[0026] Figure 2 It is a structure schematic diagram of the separation state of the present application;

[0027] Figure 3 isometric view of the bottom structure of the separated state of the present application;

[0028] Figure 4 isometric view of the internal structure of the mating socket of the present application;

[0029] Figure 5 isometric view of the Figure 4 isometric view of the partial enlarged structure at A of the present application;

[0030] Figure 6 isometric view of the guiding assembly, clamping assembly structure of the present application;

[0031] Figure 7 isometric view of the exploded structure of the guiding assembly, clamping assembly of the present application;

[0032] Figure 8 isometric view of the exploded structure of the guiding assembly, clamping assembly of the present application from another angle;

[0033] Figure 9 isometric view of the sliding plate of the present application.

[0034] The reference signs are: 1, mutual inductor main body; 11, mating base; 12, mating socket; 13, inner positioning folded edge; 14, mating socket; 2, unlocking assembly; 21, unlocking top column; 22, limiting hook plate; 23, first elastic member; 24, hook plate wedge surface; 3, guiding assembly; 31, guiding rack; 32, first socket; 33, second socket; 34, sliding plate; 35, top plate wedge tooth; 36, directional lock plate; 37, lock plate wedge tooth; 38, lock plate wedge groove; 39, mounting groove; 310, third elastic member; 311, trigger pressing plate; 312, sliding wedge groove; 4, clamping assembly; 41, sliding groove; 42, piston; 43, second elastic member; 44, fixed column; 45, copper bar pressing plate; 46, gasket socket; 47, elastic gasket. DETAILED DESCRIPTION

[0035] 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 are within the protection scope of the present application.

[0036] Embodiment one

[0037] The current transformer can reduce the time for installing the transformer on the mounting plate, but when installing the open-type electromagnetic transformer, the two parts of the transformer need to be disassembled and sleeved around the measured copper bar, and the butt joint of the transformer body and the base is generally butt jointed by screws, bolts and other connecting pieces, and when disassembling and butt jointing, the screws, bolts and other connecting pieces need to be disassembled by using a screwdriver to separate the open-type transformer, so that the disassembly and installation mode is not quick enough, which affects the maintenance and detection efficiency of the power system.

[0038] As shown in Figures 1 to 9 , the electromagnetic voltage transformer comprises a transformer body 1, a butt joint base 11 arranged below the transformer body 1, two butt joint plug-in frames 12 fixedly connected below the transformer body 1, inner positioning folded edges 13 arranged in the two butt joint plug-in frames 12, a butt joint socket 14 with the same number and corresponding positions as the butt joint plug-in frames 12 and arranged at the upper end of the butt joint base 11, and an unlocking assembly 2 arranged in the two butt joint sockets 14.

[0039] As shown in Figures 1 to 5 , the unlocking assembly 2 comprises an unlocking top column 21 in sliding connection with the butt joint base 11, a limiting hook plate 22 fixedly connected to one end of the unlocking top column 21 and located in the butt joint socket 14, and the other end of the unlocking top column 21 located outside the butt joint base 11.

[0040] As shown in Figures 1 to 5 , the limiting hook plate 22 is in sliding connection with the inside of the butt joint socket 14, a first elastic member 23 is sleeved on the unlocking top column 21, one end of the first elastic member 23 is connected with the limiting hook plate 22, the other end of the first elastic member 23 is connected with the inner wall of the butt joint socket 14, and a hook plate wedge surface 24 is arranged at the upper edge of the limiting hook plate 22.

[0041] In actual use, when the transformer body 1 and the butt joint base 11 are in butt joint state, the butt joint plug-in frames 12 are inserted into the butt joint sockets 14, and the limiting hook plate 22 is located in the butt joint plug-in frames 12, the hook-shaped structure of the limiting hook plate 22 is butt jointed with the inner positioning folded edges 13, so that the transformer body 1 and the butt joint base 11 cannot be separated.

[0042] When the transformer body 1 and the butt joint base 11 need to be separated, the unlocking top column 21 can be pressed to move the limiting hook plate 22 inward, so that the top hook-shaped folded edge of the limiting hook plate 22 is separated from the inner positioning folded edges 13, and the transformer body 1 can be separated from the butt joint base 11, thereby realizing the quick separation of the transformer body 1 and the butt joint base 11.

[0043] When the transformer body 1 is docked with the docking base 11 again, the docking frame 12 is inserted into the docking port 14, the limiting hook plate 22 is docked with the inner positioning flange 13, and the transformer body 1 and the docking base 11 cannot be separated.

[0044] In summary, through the setting of the unlocking assembly 2, when the transformer body 1 is docked with the docking base 11, the docking frame 12 is inserted into the docking port 14, the limiting hook plate 22 is docked with the inner positioning flange 13, and the transformer body 1 and the docking base 11 cannot be separated, when the transformer body 1 is separated from the docking base 11, the unlocking top column 21 can be pressed to move the limiting hook plate 22 inward, so that the limiting hook plate 22 is separated from the inner positioning flange 13, and the transformer body 1 can be separated from the docking base 11, realizing the quick separation of the transformer body 1 and the docking base 11, without the need for additional tools, solving the problem that the screwdriver must be used to disassemble the connecting members such as screws and bolts to separate the mouth-type transformer when the traditional voltage transformer is disassembled and docked, and the disassembly and installation method is not quick enough, affecting the maintenance and detection efficiency of the power system.

[0045] Embodiment two

[0046] It is found that the fixing method of the voltage transformer to the copper bar is screw column pressing, and additional tools are required to rotate and adjust the screw column during operation, resulting in the problem that the fixing operation of the transformer and the copper bar is not convenient enough. In order to solve the above problem, the embodiment is invented.

[0047] As shown in Figures 1 to 9 The transformer body 1 is provided with two groups of symmetrical guide assemblies 3 along the two sides of the length of the copper bar, and each group of guide assemblies 3 is provided with a clamping assembly 4 for clamping the transformer on the copper bar.

[0048] As shown in Figures 6 to 9 The clamping assembly 4 includes two pistons 42, and the end of the sliding plate 34 close to the copper bar is provided with two sliding grooves 41, and the two pistons 42 are respectively slidingly connected in the corresponding sliding grooves 41. The inside of the two sliding grooves 41 is slidingly connected with a fixed column 44 close to the copper bar on the side corresponding to the piston 42, and the second elastic member 43 is connected between each piston 42 and the corresponding fixed column 44. The inside of each sliding groove 41 and the side corresponding to the piston 42 away from the copper bar are provided with a thermal expansion gas.

[0049] As shown in Figures 6 to 9As shown, the fixed column 44 is fixedly connected with the copper bar pressing plate 45 away from the one end of the piston 42, the copper bar pressing plate 45 is provided with two gasket insertion ports 46 on the side close to the copper bar, and the inside of each gasket insertion port 46 is provided with an elastic gasket 47.

[0050] As shown in the figure, Figures 1 to 8 The guide assembly 3 includes a guide frame 31, and the two ends of the guide frame 31 are fixedly connected on one side of the transformer body 1. The inside of the guide frame 31 is provided with a first insertion port 32, and the two ends of the guide frame 31 are provided with a second insertion port 33.

[0051] As shown in the figure, Figures 6 to 8 The inside of the first insertion port 32 is slidably connected with a directional lock plate 36, and the end close to the sliding plate 34 of the directional lock plate 36 is provided with a plurality of lock plate wedge teeth 37. The top plate wedge teeth 35 and the lock plate wedge teeth 37 can be meshed with each other.

[0052] As shown in the figure, Figures 1 to 8 The two ends of the directional lock plate 36 are provided with a lock plate wedge groove 38 on the side close to the guide frame 31. The inside of each lock plate wedge groove 38 is provided with a mounting groove 39, and each mounting groove 39 is provided with a third elastic element 310. One end of each third elastic element 310 is connected with the corresponding mounting groove 39, and the other end of each third elastic element 310 is connected with the guide frame 31.

[0053] As shown in the figure, Figures 1 to 9 The inside of the second insertion port 33 is slidably connected with a trigger pressing plate 311, and the side of the trigger pressing plate 311 is provided with a limiting groove. The end close to the directional lock plate 36 of the trigger pressing plate 311 is provided with a sliding wedge groove 312, and the sliding wedge groove 312 and the lock plate wedge groove 38 are slidably matched.

[0054] In actual use, during the installation of the voltage transformer to the copper bar, the sliding plate 34 is pushed to drive the copper bar pressing plate 45 to move towards the copper bar, so that the elastic gasket 47 is attached to the copper bar to clamp the copper bar. Due to the wedge tooth structure of the top plate wedge teeth 35 and the lock plate wedge teeth 37, the sliding plate 34 can move towards the copper bar, so that the sliding plate 34 cannot move away from the center of the transformer body 1, thereby realizing the one-way locking function.

[0055] When it is needed to separate the clamping assembly 4 from the copper bar, the trigger pressing plate 311 can be pinched to move towards the center of the directional lock plate 36, and the directional lock plate 36 is pushed outwards through the sliding wedge groove 312 and the inclined surface of the lock plate wedge groove 38, so that the lock plate wedge teeth 37 are separated from the top plate wedge teeth 35, the locking of the sliding plate 34 is released, and the sliding plate 34 can be moved left and right to adjust the clamping of the copper bar.

[0056] In summary, by the arrangement of the guide assembly 3 and the clamping assembly 4, when adjusting the fixed connection of the voltage transformer and the copper bar, the sliding plate 34 can be pushed by external force, and due to the wedge tooth structure of the top plate wedge tooth 35 and the lock plate wedge tooth 37, the sliding plate 34 can be pushed towards the center of the transformer body 1, so that the elastic gasket 47 is tightly attached to the outer surface of the copper bar. At the same time, due to the wedge tooth structure of the top plate wedge tooth 35 and the lock plate wedge tooth 37, the sliding plate 34 cannot move away from the center of the transformer body 1, thereby realizing the one-way locking function. When it is necessary to separate, the two trigger pressure plates 311 can be pinched to move the trigger pressure plate 311 towards the center of the directional lock plate 36, so that the lock plate wedge tooth 37 is separated from the top plate wedge tooth 35, and the locking of the sliding plate 34 is released. The sliding plate 34 can be moved left and right to adjust the clamping of the copper bar, thereby improving the fixing and dismounting speed of the copper bar. The voltage transformer can be installed without tools, and the installation convenience of the voltage transformer and the detection and maintenance efficiency of the power system are improved.

[0057] Example Three

[0058] It is found that during the normal operation of the voltage transformer, electromagnetic vibration sound may be generated due to electromagnetic conversion, especially when the voltage is increased and the current is increased, the vibration is more significant, and long-term electromagnetic vibration may cause the fixed point to fall off. At this time, abnormal noise will be generated due to vibration, which will affect the detection efficiency of the power system. Therefore, the device described in the above examples is improved in this embodiment.

[0059] As shown in Figures 5 to 9 , the clamping assembly 4 includes two pistons 42, and the sliding plate 34 is provided with two sliding grooves 41 at one end close to the copper bar. The two pistons 42 are respectively slidably connected in the corresponding sliding grooves 41. The inside of the two sliding grooves 41 is slidably connected with a fixed column 44 at the side close to the copper bar corresponding to the piston 42. The second elastic member 43 is connected between each piston 42 and the corresponding fixed column 44. The inside of each sliding groove 41 and the side away from the copper bar corresponding to the piston 42 are provided with a thermal expansion gas.

[0060] As shown in Figures 5 to 9 , the fixed column 44 is fixedly connected with a copper bar pressing plate 45 at the end away from the piston 42. The copper bar pressing plate 45 is provided with two gasket insertion openings 46 at the side close to the copper bar. The inside of each gasket insertion opening 46 is provided with an elastic gasket 47.

[0061] In actual use, when the pushing and guiding assembly 3 clamps the copper bar with the clamping assembly 4, the reaction force can press the second elastic member 43 through the fixed column 44 on the copper bar pressing plate 45, so that the piston 42 moves in the sliding groove 41 and presses the gas inside the sliding groove 41. When the voltage transformer vibrates, the vibration frequency can be offset by the elastic force of the second elastic member 43, so as to prevent the loosening of the clamping assembly 4. When the voltage and current of the copper bar increase during use, the voltage transformer will generate heat along with the increase of the voltage and current of the copper bar. When the gas in the sliding groove 41 is heated, it will expand and move the piston 42 in the direction of the copper bar, and press the second elastic member 43. The elastic force of the second elastic member 43 is adjusted to further improve the vibration damping effect, so as to avoid abnormal noise caused by vibration and improve the detection efficiency of the power system.

[0062] In summary, through the setting of the clamping assembly 4, when the pushing and guiding assembly 3 clamps the copper bar with the clamping assembly 4, the reaction force can press the second elastic member 43 through the fixed column 44 on the copper bar pressing plate 45, so that the piston 42 moves in the sliding groove 41 and presses the gas inside the sliding groove 41. When the voltage transformer vibrates, the vibration frequency can be offset by the elastic force of the second elastic member 43, so as to prevent the loosening of the clamping assembly 4. When the voltage and current of the copper bar increase during use, the voltage transformer will generate heat along with the increase of the voltage and current of the copper bar. When the gas in the sliding groove 41 is heated, it will expand and move the piston 42 in the direction of the copper bar, and press the second elastic member 43. The elastic force of the second elastic member 43 is adjusted to further improve the vibration damping effect, so as to avoid abnormal noise caused by vibration and improve the detection efficiency of the power system.

[0063] Example Four

[0064] A method for using an electromagnetic voltage transformer, comprising the following steps:

[0065] S1, separate the transformer body 1 from the butt joint base 11 by pressing the unlocking assembly 2;

[0066] S2, set the transformer body 1 on the copper bar;

[0067] S3, fix the transformer on the copper bar through the guiding assembly 3 and the clamping assembly 4;

[0068] S4, fix the butt joint base 11 under the transformer body 1 through the unlocking assembly 2.

[0069] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An electromagnetic voltage transformer comprising a transformer body, a docking base is arranged below the transformer body, characterized in that: Two butt-in frames are fixedly connected below the mutual inductor body, inner positioning flanges are arranged in the two butt-in frames, upper ends of the butt-in bases are provided with butt-in ports corresponding in number and position to the butt-in frames, and unlocking assemblies are arranged in the two butt-in ports. The unlocking assembly comprises an unlocking top column in sliding connection with the butt-in base, one end of the unlocking top column is located in the interior of the butt-in port and is fixedly connected with a limiting hook plate, and the other end of the unlocking top column is located outside the butt-in base. Two groups of symmetrical guiding assemblies are arranged on both sides of the mutual inductor body along the length of the copper bar, and a clamping assembly for clamping the mutual inductor on the copper bar is arranged on each group of the guiding assemblies. The guiding assembly comprises a guiding frame, both ends of the guiding frame are fixedly connected to one side of the mutual inductor body, a first port is arranged in the interior of the guiding frame, and a second port is arranged at both ends of the guiding frame. A sliding plate is in sliding connection between the mutual inductor body and the guiding frame, a plurality of top plate wedges are arranged on the side of the sliding plate away from the mutual inductor body, a directional lock plate is in sliding connection in the first port, a plurality of lock plate wedges are arranged on the end of the directional lock plate close to the sliding plate, and the top plate wedges and the lock plate wedges can be engaged with each other. Lock plate wedge grooves are arranged on the sides of both ends of the directional lock plate close to the guiding frame, an installation groove is arranged in each lock plate wedge groove, a third elastic member is arranged in each installation groove, one end of each third elastic member is connected with the corresponding installation groove, and the other end of each third elastic member is connected with the guiding frame. The clamping assembly comprises two pistons, two sliding grooves are arranged on the end of the sliding plate close to the copper bar, the two pistons are respectively in sliding connection in the corresponding sliding grooves, a fixed column is in sliding connection in the interior of each sliding groove on the side close to the copper bar corresponding to the piston, a second elastic member is connected between each piston and the corresponding fixed column, and a thermal expansion gas is arranged between the interior of each sliding groove and the side away from the copper bar corresponding to the piston. A copper bar pressing plate is fixedly connected to the end of the fixed column away from the piston, two gasket ports are arranged on the side of the copper bar pressing plate close to the copper bar, and an elastic gasket is arranged in the interior of each gasket port. A trigger pressing plate is in sliding connection in the interior of the second port, a limiting groove is arranged on the side of the trigger pressing plate, a sliding wedge groove is arranged on the end of the trigger pressing plate close to the directional lock plate, and the sliding wedge groove and the lock plate wedge groove are in sliding cooperation.

2. The electromagnetic voltage transformer according to claim 1, characterized in that: The limiting hook plate is in sliding connection in the interior of the butt-in port, a first elastic member is sleeved on the unlocking top column, one end of the first elastic member is connected with the limiting hook plate, the other end of the first elastic member is connected with the inner wall of the butt-in port, and a hook plate wedge surface is arranged on the upper edge of the limiting hook plate.

3. A method of using an electromagnetic voltage transformer according to any one of claims 1-2, characterized in that: The method comprises the following steps: S1, the mutual inductor body and the butt-in base are separated by pressing the unlocking assembly; S2, the mutual inductor body is sleeved on the copper bar; S3, fixing the transformer on the copper bar through the guide assembly and the clamping assembly; S4, fixing the butt base on the transformer main body through the unlocking assembly.

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