Low-voltage current transformer

Abstract

The present invention discloses a low-voltage current transformer, and specifically relates to the technical field of current transformers. Existing low-voltage current transformers have the problem that the cable is easily rubbed against the internal edge when threading, causing wear, and the cable is not centered, causing measurement errors. The present invention includes a protective shell, the inner cavity of the protective shell is installed with a current transformer body, the upper and lower sides of the protective shell are fixed with fixing components, one side of the protective shell is fixed with a connecting component, and one side of the connecting component is rotatably connected to a mounting component. This technical solution clamps the cable in the center to avoid the problem of continuous contact friction between the cable and the internal edge of the current transformer body, which causes damage to the cable, and at the same time can increase the measurement accuracy and reduce errors; through the mutual cooperation between the provided connecting component and the mounting component, not only the angle of the current transformer body can be changed, but also the direction of the current transformer body can be switched, thereby facilitating the installation and angle adjustment of the device and improving applicability.

Description

Technical Field

[0001] The present invention relates to the technical field of current transformers, and in particular to a low-voltage current transformer. Background Art

[0002] A low-voltage current transformer is a device that can convert high AC current into easily controllable low current. It has the characteristics of excellent performance and stable accuracy. The current transformer consists of a closed iron core, windings and insulating materials. It is an instrument that converts large primary current into small secondary current for measurement based on the principle of electromagnetic induction. Current transformers are widely used in smart grids and are commonly found in distribution cabinets. They are mainly used to expand the range of single-phase meters, measure single-phase line current, measure three-phase current in three-phase balanced lines or three-phase unbalanced lines, and sample reactive power controller current. They play an important role in the safe operation of power systems.

[0003] During the use of low-voltage transformers, since they need to be threaded, if there is continuous contact friction between the cable and the inner edge of the transformer during the threading process, it is easy to cause varying degrees of wear. In addition, if the cable cannot pass through the transformer in the center, it will also cause errors in the transformer measurement. Existing current transformers are often not convenient for angle adjustment. When the position needs to be adjusted, the screws need to be turned to readjust the position of the current transformer. Since there are generally multiple current transformers, this adjustment method brings various inconveniences to actual operations. Summary of the Invention

[0004] The purpose of the present invention is to propose a low-voltage current transformer to prevent the cable from being worn to varying degrees due to continuous contact friction between the cable and the inner edge of the transformer during use. In addition, if the cable cannot pass through the transformer in the center, it will also cause errors in the transformer's measurement.

[0005] In order to achieve the above object, the present invention adopts the following technology: a low-voltage current transformer:

[0006] It includes a protective shell, wherein a current transformer body is installed in the inner cavity of the protective shell, fixing parts are fixed on the upper and lower sides of the protective shell, a connecting part is fixed on one side of the protective shell, and a mounting part is rotatably connected to one side of the connecting part;

[0007] The fixing component includes a circular groove plate, the side wall of the circular groove plate groove cavity is rotatably connected to a rotating plate through a torsion spring, the rotating plate is provided with a plurality of limiting grooves in an annular array, the bottom wall of the circular groove plate groove cavity is provided with a plurality of sliding grooves in an annular array, the plurality of sliding grooves are all slidably connected to the inner cavities of the plurality of baffles, a limiting column is fixed on one side of the plurality of baffles, and a matching groove is provided on the inclined surface of one side of the plurality of baffles;

[0008] By rotating the rotating plate, multiple baffles can slide along the inner cavity of the sliding groove. After the multiple baffles move, the multiple matching grooves can form a circle that adapts to the outer diameter of the cable. At the same time, due to the action of the torsion spring, the rotating plate rotates, so that the multiple baffles clamp the cable in the center.

[0009] As a further description of a low voltage current transformer of the above technology:

[0010] A slider for rotating the rotating plate is fixed on the outer surface of the rotating plate.

[0011] As a further description of a low voltage current transformer of the above technology:

[0012] An arc tube is rotatably mounted on one side of the rotating plate through a damping bearing, and a through hole adapted to the arc tube is opened at the center of the rotating plate and the circular groove plate.

[0013] As a further description of a low voltage current transformer of the above technology:

[0014] After the multiple baffles move, the multiple matching grooves can form a circle that adapts to the outer diameter of the cable, and the inner surfaces of the multiple matching grooves are commonly fixed with multiple wave protrusions.

[0015] As a further description of a low voltage current transformer of the above technology:

[0016] The connecting component includes a fixed slot block fixed to the protective shell, and a cross slot 1 is provided on both sides of the groove of the fixed slot block, and a movable plug-in plate is inserted into the inner cavities of the two cross slots 1.

[0017] As a further description of a low voltage current transformer of the above technology:

[0018] The installation component includes an installation box, the inner cavity of the installation box is rotatably connected to a worm wheel and a worm engaged with the worm wheel, and a rotating wheel is fixed to one side of the worm wheel.

[0019] As a further description of a low voltage current transformer of the above technology:

[0020] A clamping block is coaxially fixed on one side of the worm wheel, a cross slot 2 adapted to the cross slot 1 is provided on one side of the clamping block, and an I-beam is fixed on one side of the installation box.

[0021] As a further description of a low voltage current transformer of the above technology:

[0022] L-shaped frames are fixed on both sides of the installation box, buffer plates are fixed on one side of the vertical parts of the two L-shaped frames, and a buffer sheet is fixed on one side of the installation box.

[0023] In summary, due to the adoption of the above-mentioned technology in a low-voltage current transformer, the beneficial effects of the present invention are:

[0024] 1. This device can clamp the cable in the center through the cooperation between the current transformer body, protective shell and two fixed parts, avoiding the problem of continuous contact friction between the cable and the internal edge of the current transformer body, which may cause cable damage, and at the same time increase the measurement accuracy and reduce errors; when threading the cable, the cable passes through the inner cavity of the arc tube on one side, and then the rotating plate rotates to move the multiple limit slots with the limit columns, so that the multiple baffle angles are moved away from each other, which is convenient for the cable to pass through, and the cable passes out from the arc tube on the other side, and then the rotating plate rotates under the action of the torsion spring, so that the multiple baffles clamp the cable in the center, which can avoid the friction between the cable and the internal edge of the current transformer body, which may cause the cable to wear, and can also improve the measurement accuracy.

[0025] 2. This device cooperates with the current transformer body through the mutual cooperation between the two fixed components and the current transformer body. After clamping the cable in the center, multiple baffles are moved to form multiple matching grooves into a circle that adapts to the outer diameter of the cable. The inner surface of the matching groove is in close contact with the surface of the cable, so that the current transformer body is in a closed environment, so that the current transformer body will not be affected by environmental factors, causing its performance to degrade or be damaged, thereby improving the protection of the current transformer body.

[0026] 3. Through the mutual cooperation between the provided connecting components and the installation components, this device can not only change the angle of the current transformer body, but also switch the direction of the current transformer body, thereby facilitating the installation and angle adjustment of the device and improving the applicability of the device; the worm gear is rotated by rotating the worm, and then the current transformer body is rotated through the connection between the clamping block coaxially fixed with the worm gear and the fixed slot block, and then the current transformer body can be switched from a horizontal state to a vertical state by rotating the fixed slot block, and then the current transformer body in a vertical state can also be rotated by rotating the worm gear. By switching the direction of the current transformer body and changing the angle of the current transformer body, the device can be made more convenient when installing cables, and can also be made suitable for different installation environments, thereby improving the practicality of the device.

[0027] 4. By matching the outer diameter of the cable with the arc tube, the cable bends along the arc of the arc tube during installation to avoid large torsional forces on the cable, thereby preventing damage to the internal structure of the cable. This can further prevent the resistance of the internal conductor from increasing due to excessive bending of the cable, thereby preventing the increased resistance from generating more heat and accelerating the aging process of the cable.

[0028] 5. This device forms a flexible fixation through the wave protrusions, which can ensure that the cable can freely expand and contract when it is thermally expanded and contracted, while maintaining its stability and safety. By offsetting the adjacent baffles in alternating left and right directions, the wave protrusions form a continuous wave shape, allowing the cable to twist and contract to a certain extent when subjected to external force, ensuring that the cable can freely expand and contract when it is thermally expanded and contracted. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0030] Figure 2 It is a partial structural sectional view of the device of the present invention.

[0031] Figure 3 It is a structural schematic diagram of the fixing component of the present invention.

[0032] Figure 4 It is a partial structural diagram of the fixing component of the present invention.

[0033] Figure 5 It is an exploded view of the fixing component structure of the present invention.

[0034] Figure 6 This is a schematic diagram of the fixed component state of the present invention Figure 1 .

[0035] Figure 7 This is a schematic diagram of the fixed component state of the present invention Figure 2 .

[0036] Figure 8 The present invention Figure 7 Enlarged view of point A in the middle.

[0037] Figure 9 It is a schematic structural diagram of the connecting component of the present invention.

[0038] Figure 10 This is a schematic diagram of the mounting structure of the present invention Figure 1 .

[0039] Figure 11 This is a schematic diagram of the mounting structure of the present invention Figure 2 .

[0040] Figure 12 It is a partial structural sectional view of the mounting component of the present invention.

[0041] Figure 13 It is a schematic diagram of the rotation state of the fixed slot block of the present invention.

[0042] Figure 14 It is a schematic diagram of the angle adjustment of the mounting component of the present invention.

[0043] Legend:

[0044] 10. Protective shell; 11. Current transformer body;

[0045] 20. Fixed component; 21. Circular groove plate; 22. Rotating plate; 23. Limiting groove; 24. Arc tube; 25. Slider; 26. Sliding groove; 27. Baffle; 28. Limiting column; 29. Matching groove; 291. Wave protrusion;

[0046] 30. Connecting parts; 31. Fixed slot block; 32. Cross slot 1; 33. Insert plate;

[0047] 40. Mounting parts; 41. Mounting box; 42. Worm gear; 43. Worm; 44. Rotating wheel; 45. I-beam; 46. Clamping block; 47. Cross slot 2; 48. L-shaped frame; 49. Buffer plate. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings to clearly and completely describe the technology of a low-voltage current transformer in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0049] Example 1

[0050] like Figure 1 and Figure 2 As shown, a low-voltage current transformer includes a protective shell 10. The surface of the protective shell 10 is an insulating layer. A current transformer body 11 is installed in the inner cavity of the protective shell 10. The current transformer body 11 is installed in the inner cavity of the protective shell 10, and its terminal is exposed through the protective shell 10. The P1 surface and the P2 surface of the current transformer body 11 are also displayed on the surface of the current transformer body 11 to avoid confusion in distinguishing the forward and reverse directions during use.

[0051] Next, fixing parts 20 are fixed on the upper and lower sides of the protective shell 10. The fixing parts 20 are used to fix the cables and adapt to the outer diameter of the cables to prevent the cables from being worn due to contact friction during use. A connecting part 30 is fixed on one side of the protective shell 10. The connecting part 30 is rotatably connected to the installation part 40 on one side. The connection between the connecting part 30 and the installation part 40 can change the direction and angle of the current transformer body 11, which is convenient for adjusting the adaptation angle during use.

[0052] Further, if Figure 3-Figure 5As shown, the fixing component 20 includes a circular slot plate 21 fixed to the protective shell 10. The two circular slot plates 21 are fixed to both sides of the protective shell 10. After the cable is installed, the current transformer body 11 is sealed in the two circular slot plates 21 and the inner cavity of the current transformer body 11, providing protection for the current transformer body 11 and preventing the current transformer body 11 from being affected by environmental factors and causing its performance to degrade or be damaged.

[0053] Next, the side wall of the inner cavity of the groove of the circular groove plate 21 is rotatably connected to a rotating plate 22 via a torsion spring. The top of the rotating plate 22 is on the same horizontal plane as the top of the circular groove plate 21. The rotating plate 22 connected by the torsion spring can be reset after rotation. The rotating plate 22 is provided with a plurality of limiting grooves 23 in an annular array.

[0054] In order to control the rotation of the rotating plate 22, a slider 25 for rotating the rotating plate 22 is fixed to the outer surface of the rotating plate 22. An arc groove for sliding the slider 25 is opened on the outer side of the circular groove plate 21. When the slider 25 is pushed, the slider 25 slides in the arc groove, which can rotate the rotating plate 22.

[0055] Among them, in order to make the cable pass through the center, an arc tube 24 is rotatably installed on one side of the rotating plate 22 through a damping bearing. The arc tube 24 is adapted to the outer diameter of the cable. Bending along the curvature of the arc tube 24 can avoid generating a large torsional force on the cable, thereby preventing damage to the internal structure of the cable. A through hole adapted to the arc tube 24 is opened at the center of the rotating plate 22 and the circular slot plate 21. The through hole is adapted to the outer diameter of the cable. At the same time, the center of the through hole is on the same straight line as the center of the coil of the current transformer body 11, so that the cable passes through the through hole from the center of the current transformer body 11, which not only avoids continuous contact friction between the cable and the internal edge of the current transformer body 11, but also increases the measurement accuracy and reduces errors.

[0056] Next, a plurality of sliding grooves 26 in an annular array are provided on the bottom wall of the inner cavity of the groove of the circular groove plate 21. The plurality of sliding grooves 26 are communicated with each other. The inner cavities of the plurality of sliding grooves 26 are all slidably connected with baffles 27. The plurality of baffles 27 are also in an annular array. A connecting block that slides in the inner cavity of the sliding groove 26 is fixed on one side of the baffle 27, so that the baffle 27 can slide along the sliding groove 26. A limiting column 28 that is adapted to the limiting groove 23 is fixed on one side of the plurality of baffles 27. The limiting column 28 is located in the inner cavity of the limiting groove 23. The rotating plate 22 is rotated so that the limiting groove 23 pushes the limiting column 28 to move. The movement of the limiting column 28 can make the baffle 27 slide in the inner cavity of the sliding groove 26, so that the angled parts of the plurality of baffles 27 are gradually separated.

[0057] like Figure 7 and Figure 8As shown, in order to adapt to the outer diameter of the cable, a plurality of baffles 27 are provided with matching grooves 29 on the inclined surfaces on one side. A plurality of wave protrusions 291 are fixed to the inner surfaces of the plurality of matching grooves 29. The wave protrusions 291 are made of rubber and have a certain elasticity to adapt to the thermal expansion and contraction of the cable. The surface of the wave protrusions 291 is coated with an insulating layer to avoid electric shock during use. By offsetting the adjacent baffles 27 in alternating directions to the left and right, the wave protrusions 291 form a continuous wave shape, thereby allowing the cable to be twisted and stretched to a certain extent when subjected to external force, ensuring that the cable can freely stretch and contract during thermal expansion and contraction while maintaining its stability and safety.

[0058] The size of the matching slot 29 can be selected according to the installed cable, so that the device can meet the uniqueness while also providing a variety of options for adapting to cables of different diameters to meet the diversity of products;

[0059] like Figure 6 and Figure 7 As shown, by rotating the rotating plate 22, the limiting groove 23 pushes the limiting column 28 to move, so that the multiple baffles 27 slide along the inner cavity of the sliding groove 26. After the multiple baffles 27 move, the multiple matching grooves 29 can form a circle that adapts to the outer diameter of the cable. At the same time, due to the action of the torsion spring, the rotating plate 22 rotates, so that the multiple baffles 27 clamp the cable in the center.

[0060] Example 2

[0061] This embodiment further defines the connecting component 30 and the mounting component 40 on the basis of the first embodiment, so as to achieve the purpose of adjusting the angle of the current transformer.

[0062] Specifically, such as Figure 9 As shown, the connecting component 30 includes a fixed slot block 31 fixed to the protective shell 10, and a cross slot 32 is provided on both sides of the groove of the fixed slot block 31. A movable plug-in plate 33 is inserted into the inner cavity of the two cross slots 32. The plug-in plate 33 is movable and can be removed, and the surface of the plug-in plate 33 is coated to increase friction and prevent the plug-in plate 33 from slipping when inserted into the inner cavity of the cross slot 32.

[0063] Further, if Figure 10-12 As shown, the mounting component 40 includes a mounting box 41. A worm gear 42 and a worm 43 meshing with the worm gear 42 are rotatably connected to the inner cavity of the mounting box 41. The rotation of the worm gear 42 can be controlled by rotating the worm 43. The cooperation between the worm gear 42 and the worm 43 has a self-locking property, so that the rotation angle of the worm gear 42 can be adjusted while preventing rotation. A rotating wheel 44 is fixed to one side of the worm 43. The rotating wheel 44 is located on the outside of the mounting box 41 and is used to rotate the worm gear 42.

[0064] Next, a clamping block 46 is coaxially fixed to one side of the worm gear 42. The clamping block 46 is coaxially fixed to the worm gear 42. When the worm gear 42 rotates, the clamping block 46 can rotate with it. A cross slot 2 47 is provided on one side of the clamping block 46 to match the cross slot 1 32. The cross slot 2 47 has the same structure as the cross slot 1 32. The clamping block 46 is connected to the fixed slot block 31. The plug-in plate 33 is inserted into the cross slot 1 32 and the cross slot 2 47 to fix the fixed slot block 31 to the installation box 41. The fixed slot block 31 can rotate with the clamping block 46, thereby causing the current transformer body 11 to rotate along with the protective shell 10, thereby achieving the purpose of adjusting the angle of the current transformer body 11.

[0065] An I-shaped frame 45 is fixed to one side of the mounting box 41. By rotating the fixed slot block 31, the fixed slot block 31 is rotated from a horizontal state to a vertical state, thereby changing the current transformer body 11 from a horizontal state to a vertical state, which is applicable to different situations. In addition, the rotation of the worm gear 42 can also rotate the current transformer body 11 in the vertical direction. The I-shaped frame 45 is used to support the fixed slot block 31 after rotation to prevent the fixed slot block 31 from being damaged.

[0066] In addition, L-shaped frames 48 are fixed on both sides of the installation box 41, and buffer plates 49 are fixed on one side of the vertical parts of the two L-shaped frames 48. Several buffer holes are opened on the buffer plates 49. The buffer plates 49 are made of silicone. A buffer sheet is fixed on one side of the installation box 41. The buffer plate 49 and one end face of the buffer sheet are on the same plane. After installation, the mechanical vibration of the device can be alleviated by the buffer plate 49 and the buffer sheet, thereby avoiding the problem of loose wiring caused by mechanical vibration.

[0067] It should be noted that the current transformer body 11, worm wheel 42, worm 43 and buffer plate 49 in the present invention are all existing technologies, and their installation and control methods are also conventional designs, which will not be elaborated in detail in the present invention.

[0068] Working principle of the present invention: This device is a low-voltage current transformer. The two fixing components 20 can be used to clamp the cable in the center, avoiding the problem of continuous contact friction between the cable and the inner edge of the current transformer body 11, which may cause damage to the cable. At the same time, it can also increase the measurement accuracy and reduce errors.

[0069] Specifically, such as Figure 6 and Figure 7 As shown, when in use, the cable is passed through the inner cavity of the arc tube 24, and then the cable is passed through the through hole of the circular groove plate 21 of the fixed component 20 on one side, and then the slider 25 is pushed to rotate the rotating plate 22. During the rotation of the rotating plate 22, the multiple limiting grooves 23 are passed to move the multiple limiting columns 28, thereby moving the multiple baffles 27 along the sliding grooves 26, so that the multiple baffles 27 are slowly opened at the oblique angle position, and then the cable is passed through;

[0070] Then pass the cable through the coil of the current transformer body 11, and then use the above operation to pass the cable through another fixed component 20 and out from the inner cavity of another arc tube 24;

[0071] After the cable is passed through, the slider 25 is released, and the rotating plate 22 rotates under the action of the torsion spring, thereby moving the plurality of baffles 27. Figure 7 As shown, the matching grooves 29 on the multiple baffles 27 form a circle that adapts to the cable. The multiple baffles 27 clamp the cable in the center under the action of the torsion spring. In the absence of external force, the cable will not deviate and the cable is clamped in the center, avoiding continuous contact friction between the cable and the inner edge of the current transformer body 11, thereby avoiding the problem of cable damage. In addition, the cable is clamped in the center, which can also increase the measurement accuracy and reduce the error.

[0072] By cooperating with each other between the connecting component 30 and the mounting component 40, not only the angle of the current transformer body 11 can be changed, but also the orientation of the current transformer body 11 can be switched, thereby facilitating installation and angle adjustment. Figure 3 and Figure 14 As shown;

[0073] By rotating the rotating wheel 44, the rotating wheel 44 rotates the worm 43, and the worm 43 rotates the meshing worm wheel 42. The connection between the clamping block 46 coaxially fixed to the worm wheel 42 and the fixed slot block 31 causes the protective housing 10 to rotate with the rotation of the worm wheel 42. The current transformer body 11 located in the inner cavity of the protective housing 10 also rotates with the rotation of the worm wheel 42, thereby achieving the purpose of adjusting the angle.

[0074] Next, the plug board 33 is pulled out, and then the fixed slot block 31 is rotated to change the fixed slot block 31 from a horizontal state to a vertical state, thereby changing the protective shell 10 from a horizontal state to a vertical state, and the current transformer body 11 also changes from a horizontal state to a vertical state, changing the direction of the coil of the current transformer body 11, further improving the applicability of the device;

[0075] Next, insert the insert plate 33 into the cross slot 1 32 and the inner cavity of the clamping block 46, connect the fixed slot block 31 and the clamping block 46, and then rotate the worm 43 and worm wheel 42 to rotate the current transformer body 11 on the vertical plane and adjust the angle of the vertical plane. This further facilitates the readjustment of the current transformer position and improves the practicality of the device.

[0076] Then, when multiple transformers are installed on the same straight line and very close to each other, the bending angle of the cable will be too large, such as Figure 14As shown, during installation, the distance between adjacent current transformers is reduced by adjusting the angle of the current transformer body 11. At the same time, by adjusting the position of the arc tube 24, the cable can be bent along the curvature of the arc tube 24, which can avoid the cable from generating a large torque, thereby preventing the internal structure of the cable from being damaged, and at the same time reducing the occupied area of multiple transformers.

[0077] The above description is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field of the present invention, within the technical scope disclosed by the present invention, can replace or change the low-voltage current transformer and its inventive concept according to the technology of the present invention, and the replacement or change should be covered by the protection scope of the present invention.

Claims

1. A low-voltage current transformer, comprising a protective shell (10), characterized in that: A current transformer body (11) is installed in the inner cavity of the protective shell (10), fixing components (20) are fixed on both the upper and lower sides of the protective shell (10), a connecting component (30) is fixed on one side of the protective shell (10), and a mounting component (40) is rotatably connected to one side of the connecting component (30); The fixing component (20) includes a circular groove plate (21), the inner side wall of the groove of the circular groove plate (21) is rotatably connected to a rotating plate (22) via a torsion spring, the rotating plate (22) is provided with a plurality of limiting grooves (23) in an annular array, the inner bottom wall of the groove of the circular groove plate (21) is provided with a plurality of sliding grooves (26) in an annular array, the inner cavities of the plurality of sliding grooves (26) are all slidably connected to baffles (27), a limiting column (28) is fixed on one side of the plurality of baffles (27), and a matching groove (29) is provided on an inclined surface on one side of the plurality of baffles (27); By rotating the rotating plate (22), the plurality of baffles (27) slide along the inner cavity of the sliding groove (26), and after the plurality of baffles (27) move, the plurality of matching grooves (29) can form a circle that matches the outer diameter of the cable. At the same time, due to the action of the torsion spring, the rotating plate (22) rotates, so that the plurality of baffles (27) clamp the cable in the center. An arc tube (24) is rotatably mounted on one side of the rotating plate (22) via a damping bearing, and a through hole adapted to the arc tube (24) is provided at the center of each of the rotating plate (22) and the circular groove plate (21); After the multiple baffles (27) are moved, the multiple matching grooves (29) can form a circle that matches the outer diameter of the cable, and the inner surfaces of the multiple matching grooves (29) are commonly fixed with multiple wave protrusions (291).

2. The low-voltage current transformer according to claim 1, characterized in that: A slider (25) for rotating the rotating plate (22) is fixed to the outer surface of the rotating plate (22).

3. The low-voltage current transformer according to claim 1, characterized in that: The connecting component (30) includes a fixed slot block (31) fixed to the protective shell (10), and a cross slot (32) is provided on both sides of the groove of the fixed slot block (31), and a movable plug-in plate (33) is inserted into the inner cavities of the two cross slots (32).

4. The low-voltage current transformer according to claim 1, characterized in that: The mounting component (40) comprises a mounting box (41), the inner cavity of the mounting box (41) being rotatably connected to a worm wheel (42) and a worm (43) meshing with the worm wheel (42), and a rotating wheel (44) being fixed to one side of the worm (43).

5. The low-voltage current transformer according to claim 4, characterized in that: A clamping block (46) is coaxially fixed to one side of the worm wheel (42), and a second cross slot (47) adapted to the first cross slot (32) is formed on one side of the clamping block (46). An I-shaped frame (45) is fixed to one side of the installation box (41).

6. The low-voltage current transformer according to claim 5, characterized in that: L-shaped frames (48) are fixed on both sides of the installation box (41), buffer plates (49) are fixed on one side of the vertical portions of the two L-shaped frames (48), and a buffer sheet is fixed on one side of the installation box (41).

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