A current transformer assembly for small currents

Abstract

The present invention belongs to the technical field of transformers, and specifically is a current transformer assembly for small currents, including an axial rotating part, wherein the left and right sides of the axial rotating part are symmetrically provided with modified rod bodies, and the outer surface of the modified rod body is sleeved with a transfer coil; the modified rod body includes a voltage regulating motor, and the voltage regulating motor can change the pressure of the area between the guiding inner rod and the transfer metal tube by means of pressurizing and pumping. The device sets an electromagnetic coil with a certain number of turns inside the modified rod bodies on the left and right sides, so that the current flowing out of the right side is proportionally amplified, thereby converting a smaller current into a larger current that is easy to monitor, and realizing an enhanced current sensing effect. Since the modified rod bodies on both sides can be deflected under the control of the torque shaft, and then the actual distance between the electromagnetic coils on both sides is adjusted, the voltage transformation effect of electromagnetic induction can be further regulated, and then the effect of further fine-tuning the current value can be achieved after the electromagnetic coil is set.

Description

Technical Field

[0001] The invention belongs to the technical field of mutual inductors, in particular to a current mutual inductor assembly for small currents. Background Art

[0002] Current and voltage transformers are very important equipment in power systems. Voltage transformers are mainly used to convert line voltage, while current transformers are mainly used to convert line voltage and current. In addition to converting currents and voltages of varying magnitudes on the line into currents and voltages of a certain magnitude that are easy to measure, current and voltage transformers can also play a role in isolation protection to ensure the safety of operators and secondary related equipment.

[0003] Since general current transformer equipment needs to achieve the voltage transformation effect through electromagnetic induction, the transformer assembly is usually in a fixed state after setting up. However, in actual use, if the current flow rate is small, the current sensing effect of the transformer may deteriorate, so improvement is needed. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention solves the technical problems by adopting a technical solution: a current transformer assembly for small currents, comprising an axial rotating member, wherein the axial rotating member is symmetrically provided with a modified rod body on the left and right sides, and a switching coil is sleeved on the outer surface of the modified rod body;

[0005] The modified rod body includes a pressure regulating motor, which can change the pressure in the area between the guide inner rod and the adapter metal tube by means of pressurizing and pumping pressure. The middle part of the outer surface of the pressure regulating motor is fixedly connected to the guide inner rod, and the outer surface of the guide inner rod is slidably connected to a metal tube shell on one side away from the pressure regulating motor, and the inner wall of the metal tube shell is fixedly connected to the adapter metal tube on one end away from the pressure regulating motor;

[0006] The adapter coil includes an adapter plate, an external connecting rod is symmetrically arranged on the side of the adapter plate inner cavity away from the axial rotating part, and a shunt wire is evenly arranged on the side of the adapter plate inner cavity close to the axial rotating part. The end of the shunt wire away from the adapter plate is fixedly connected to the electromagnetic coil, and the outer surface of the electromagnetic coil is sleeved with a segmented slide cylinder, and the upper and lower side rings of the electromagnetic coil are respectively fixed to the upper and lower sides of the inner wall of the segmented slide cylinder, and the segmented slide cylinder is a three-section structure, which is composed of slide cylinders on the upper and lower sides and a fixed shell with an opening in the middle. The number of turns of the electromagnetic coil of the left adapter coil is set to be more than the number of turns of the electromagnetic coil of the right adapter coil.

[0007] Furthermore, the axial rotating part includes a traction sleeve, and guide shafts are symmetrically arranged at the upper and lower ends of the traction sleeve. The left and right sides of the outer surface of the guide shaft are rotatably connected with metal shells, and the upper surface of the metal shell is fixedly connected with a bent traction rod through a socket. The top of the bent traction rod is rotatably connected with a torque shaft, and the torque shaft can pull the bent traction rods on both sides through the middle rotation groove to perform deflection movement, thereby driving the corresponding metal shell to rotate around the guide shaft.

[0008] Furthermore, the number of the modified rod bodies is two, the number of the transition metal tubes is four, the side of the transition metal tube away from the metal tube shell is fixedly connected to the inner cavity of the metal casing, and the end of the transition metal tube away from the metal tube shell is rotatably connected to the middle of the outer surface of the torque shaft through an annular groove. The upper and lower sides of the outer surface of the guide inner rod are sleeved with rubber washers, the outer surface of the rubber washers is slidably connected to the inner wall of the metal tube shell, and the upper and lower sides of the outer surface of the guide inner rod are slidably connected to the inner wall of the metal tube shell through a slide groove. The middle part of the outer surface of the metal tube shell is fixedly connected to one side of the inner wall of the segmented slide cylinder through an annular groove, the middle part of the inner cavity of the guide inner rod is evenly provided with through openings, and the through openings extend to the outside of the segmented slide cylinder, the front and rear sides of the outer surface of the segmented slide cylinder are fixedly connected with protective jackets, and the outer surface of the shunt wire is slidably connected to the inner wall of the protective jacket.

[0009] Further, the traction sleeve includes an insulating sleeve, a pressure-sensing sleeve is fixedly connected to the middle of the inner wall of the insulating sleeve, a force-bearing disk is fixedly connected to the upper and lower sides of the pressure-sensing sleeve, a traction rubber rod is fixedly connected to the axis of the outer surface of the force-bearing disk, an expansion top sleeve is fixedly connected to the end of the traction rubber rod away from the force-bearing disk, and the expansion top sleeve is a layer of rubber film, and hollow cushion sleeves are symmetrically arranged on the upper and lower sides of the outer surface of the insulating sleeve. When the hollow cushion sleeve is compressed, the expansion top sleeve is squeezed into the inside of the insulating sleeve, thereby pushing the traction rubber rod to press the force-bearing disk. The end of the hollow cushion sleeve away from the insulating sleeve is fixedly connected to the axis of the outer surface of the guide shaft, the outer surface of the force-bearing disk is fixedly connected to the inner wall of the insulating sleeve, the top of the expansion top sleeve extends to the inside of the hollow cushion sleeve through the socket, and the bottom of the expansion top sleeve is fixedly connected to the inner wall of the insulating sleeve.

[0010] Furthermore, the adapter plate includes a hollow shell, a power-carrying shaft is fixedly connected to the axis of the inner cavity of the hollow shell, a horizontal support rod is symmetrically arranged on one side of the inner cavity of the power-carrying shaft, and a shunt support rod is evenly arranged on the other side of the inner cavity of the power-carrying shaft, and an indicator tube is fixedly connected to one end of the power-carrying shaft near the axis rotating member, and the current introduced from the outside enters the power-carrying shaft through the horizontal support rod on one side, and then shunts to the shunt support rods on both sides above, and the current flows back from the shunt support rod at the bottom to the horizontal support rod on the other side through the electromagnetic coil, so as to realize the circuit circulation. The outer surface of the indicator tube is fixedly connected to the middle of the outer surface of the hollow shell, the end of the horizontal support rod away from the power-carrying shaft extends to the outside of the hollow shell, and the end of the horizontal support rod away from the power-carrying shaft is fixedly connected to one end of the external connecting rod, and the end of the shunt support rod away from the power-carrying shaft is fixedly connected to one end of the shunt wire away from the segmented slide cylinder. When the current is too large, part of the current will be input to the indicator tube through the power-carrying shaft, so that the indicator tube performs lighting work.

[0011] The beneficial effects of the present invention are as follows:

[0012] 1. The device sets electromagnetic coils with a certain number of turns inside the modified rod bodies on the left and right sides, so that the current flowing out of the right side is proportionally amplified, thereby converting a smaller current into a larger current that is easy to monitor, thereby enhancing the current sensing effect. Since the modified rod bodies on both sides can be deflected under the control of the torque shaft, thereby adjusting the actual distance between the electromagnetic coils on both sides, it is possible to further regulate the voltage transformation effect of electromagnetic induction, and further fine-tune the current value after the electromagnetic coil is set.

[0013] 2. The modified rod bodies on both sides of the device can adjust their actual lengths under the control of the internal voltage-regulating motor, thereby changing the turn density of the electromagnetic coil sleeved on the outer surface, thereby achieving the effect of adjusting the self-inductance coefficient. As the actual length of the modified rod body increases, the actual resistance of the modified rod body will also increase further, thereby further reducing the actual current connected to the electromagnetic coil on the modified rod body, preventing the tester from getting an electric shock when touching the modified rod body.

[0014] 3. The traction sleeve in the middle can adjust the stretching length of the hollow cushion cylinders on both sides as the length of the modified rod body changes, thereby adjusting the pressure in the area where the expansion top sleeve is located, so that it drives the traction rubber rod to exert force on the force disk inside the insulating cylinder. Since the interior of the traction sleeve is in a sealed state, the actual length of the modified rod body can be accurately adjusted according to the force value of the pressure-sensitive cylinder, and then the density of the turns of the electromagnetic coil can be adjusted more accurately to avoid the problem of blind adjustment.

[0015] 4. Since the device is a current transformer component for small currents, the current flowing into the device is generally small. If the current is unstable or the current flowing into the device is large, the energized shafts on both sides will divert part of the current to the indicator light tube, and change the brightness of the indicator light tube as the current changes. In this way, the indicator light tube can ensure that the current inside the electromagnetic coil is within a safe value range by sharing the input current, and the problem of excessive current burning the electromagnetic coil will not occur. The brightness of the indicator light tube can serve as an indication for the operator, allowing the operator to avoid the high-voltage circuit in time, thereby protecting safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the present invention;

[0017] Figure 2 is a cross-sectional view of the present invention;

[0018] Figure 3 is a cross-sectional view of the modified rod body of the present invention;

[0019] Figure 4 is a cross-sectional view of the switching coil of the present invention;

[0020] Figure 5 is a cross-sectional view of the axial rotating member of the present invention;

[0021] Figure 6 is a cross-sectional view of a traction sleeve of the present invention;

[0022] Figure 7 It is a cross-sectional view of the adapter plate of the present invention.

[0023] In the figure: 1. Axial rotating part; 2. Modified rod body; 3. Adapter coil; 21. Voltage regulating motor; 22. Guide inner rod; 23. Rubber gasket; 24. Metal tube shell; 25. Adapter metal tube; 31. Adapter plate; 32. External connecting rod; 33. Shunt wire; 34. Segmented slide cylinder; 35. Protective jacket; 36. Electromagnetic coil; 11. Traction sleeve; 12. Guide shaft; 13. Metal sleeve shell; 14. Torque shaft; 15. Bending traction rod; 111. Insulating cylinder; 112. Pressure sensing cylinder; 113. Force plate; 114. Traction rubber rod; 115. Expansion top sleeve; 116. Hollow cushion cylinder; 311. Hollow shell; 312. Indicator tube; 313. Power-on shaft; 314. Shunt support rod; 315. Horizontal support rod. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0025] Example 1, please refer to Figure 1-Figure 5 The present invention provides a technical solution: a current transformer assembly for small current, comprising an axial rotating member 1, a modified rod body 2 is symmetrically arranged on the left and right sides of the axial rotating member 1, and a switching coil 3 is sleeved on the outer surface of the modified rod body 2;

[0026] The modified rod body 2 includes a pressure regulating motor 21, which can change the pressure in the area between the guiding inner rod 22 and the adapter metal tube 25 by means of pressurization and extraction. The guiding inner rod 22 is fixedly connected to the middle of the outer surface of the pressure regulating motor 21, and a metal tube shell 24 is slidably connected to the side of the outer surface of the guiding inner rod 22 away from the pressure regulating motor 21, and the end of the inner wall of the metal tube shell 24 away from the pressure regulating motor 21 is fixedly connected to the adapter metal tube 25;

[0027] The transfer coil 3 includes a transfer plate 31, and an external connecting rod 32 is symmetrically arranged on the side of the inner cavity of the transfer plate 31 away from the axial rotating member 1, and a shunt wire 33 is evenly arranged on the side of the inner cavity of the transfer plate 31 close to the axial rotating member 1. The end of the shunt wire 33 away from the transfer plate 31 is fixedly connected to an electromagnetic coil 36, and the outer surface of the electromagnetic coil 36 is sleeved with a segmented slide 34. The upper and lower side rings of the electromagnetic coil 36 are respectively fixed to the upper and lower sides of the inner wall of the segmented slide 34, and the segmented slide 34 is a three-section structure. The segmented slide 34 is composed of slides on the upper and lower sides and a fixed shell with an opening in the middle. The number of turns of the electromagnetic coil 36 of the left transfer coil 3 is set to be more than the number of turns of the electromagnetic coil 36 of the right transfer coil 3.

[0028] The axial rotating member 1 includes a traction sleeve 11, and a guide shaft 12 is symmetrically arranged at the upper and lower ends of the traction sleeve 11. The left and right sides of the outer surface of the guide shaft 12 are rotatably connected with metal shells 13. The upper surface of the metal shell 13 is fixedly connected with a bent traction rod 15 through a socket. The top of the bent traction rod 15 is rotatably connected with a torque shaft 14. The torque shaft 14 can pull the bent traction rods 15 on both sides through the middle rotation groove to perform deflection movement, thereby driving the corresponding metal shell 13 to rotate around the guide shaft 12.

[0029] There are two modified rod bodies 2, and four transition metal tubes 25. The side of the transition metal tube 25 away from the metal tube shell 24 is fixedly connected to the inner cavity of the metal sleeve shell 13, and the end of the transition metal tube 25 away from the metal tube shell 24 is rotatably connected to the middle of the outer surface of the torque shaft 14 through an annular groove. The upper and lower sides of the outer surface of the guide inner rod 22 are sleeved with rubber washers 23, and the outer surface of the rubber washers 23 is slidably connected to the inner wall of the metal tube shell 24. The upper and lower sides of the outer surface of the guide inner rod 22 are slidably connected to the inner wall of the metal tube shell 24 through the slide groove. The middle of the outer surface of the metal tube shell 24 is fixedly connected to one side of the inner wall of the segmented slide 34 through the annular groove. The middle of the inner cavity of the guide inner rod 22 is evenly opened with through openings, and the through openings extend to the outside of the segmented slide 34. The front and rear sides of the outer surface of the segmented slide 34 are fixedly connected with protective jackets 35, and the outer surface of the shunt wire 33 is slidably connected to the inner wall of the protective jacket 35.

[0030] After the upper and lower ends of the traction sleeve 11 of the device are fixed by adjustable vertical pull rods, the modified rod body 2 on the left is connected to the actual circuit, and the modified rod body 2 on the right is connected to the current detection device to complete the preparation work.

[0031] After the current in the circuit enters the adapter plate 31 through the external connecting rod 32 on the left, it is passed into the electromagnetic coil 36 through the shunt wires 33 on both sides of the top, and then flows back to the circuit from the shunt wire 33 at the bottom. The electromagnetic coil 36 on the left causes the electromagnetic coil 36 on the right with fewer turns to generate current through electromagnetic phenomena, and then the generated current is passed into the detection instrument. Since the number of turns of the electromagnetic coil 36 on the left is more than that of the electromagnetic coil 36 on the right, the actual current flowing out of the right side will be larger than that of the left side, thereby achieving the effect of amplifying the current, so that the device for detecting current on the right side can perform more sensitive detection of the actual weaker current.

[0032] After the current is passed through, the voltage regulating motor 21 on the left side pressurizes the area between the guide inner rod 22 and the metal tube shell 24 through the mesh port in the middle of the guide inner rod 22. At this time, the metal tube shells 24 on the upper and lower sides will slide and separate along the outer surface of the guide inner rod 22 toward the side away from the guide inner rod 22 under the action of pressure, and compress the rubber gaskets 23 on both sides. At this time, the actual length of the modified rod body 2 will increase, and when the metal tube shell 24 separates, it will also pull the upper and lower sides of the segmented slide cylinder 34 apart, causing the relatively tight electromagnetic coil 36 to be lengthened. When the number of coil turns remains unchanged, the number of coil turns becomes sparse, thereby reducing its self-inductance coefficient; similarly, when the voltage regulating motor 21 pulls the metal tube shells 24 on both sides closer, it will also pull the upper and lower sides of the segmented slide cylinder 34 for compression, making the number of coil turns tighter, thereby increasing its self-inductance coefficient.

[0033] Example 2, please refer to Figure 1-Figure 7The present invention provides a technical solution: on the basis of embodiment 1, a traction sleeve 11 includes an insulating tube 111, a pressure-sensitive tube 112 is fixedly connected to the middle of the inner wall of the insulating tube 111, and a force disk 113 is fixedly connected to the upper and lower sides of the pressure-sensitive tube 112, a traction rubber rod 114 is fixedly connected to the axis of the outer surface of the force disk 113, and an expansion top sleeve 115 is fixedly connected to the end of the traction rubber rod 114 away from the force disk 113, and the expansion top sleeve 115 is a layer of rubber film, and hollow cushion tubes 116 are symmetrically arranged on the upper and lower sides of the outer surface of the insulating tube 111. When the hollow cushion tube 116 is compressed, the expansion top sleeve 115 is squeezed toward the inside of the insulating tube 111, thereby pushing the traction rubber rod 114 to press the force disk 113. One end of the hollow cushion tube 116 away from the insulating tube 111 is fixedly connected to the axis center of the outer surface of the guide shaft 12, the outer surface of the force disk 113 is fixedly connected to the inner wall of the insulating tube 111, the top of the expansion top sleeve 115 extends to the interior of the hollow cushion tube 116 through the socket, and the bottom of the expansion top sleeve 115 is fixedly connected to the inner wall of the insulating tube 111.

[0034] The adapter plate 31 includes a hollow shell 311, and a power-carrying shaft 313 is fixedly connected to the axis of the inner cavity of the hollow shell 311. Horizontal support rods 315 are symmetrically arranged on one side of the inner cavity of the power-carrying shaft 313, and shunt support rods 314 are evenly arranged on the other side of the inner cavity of the power-carrying shaft 313. An indicator tube 312 is fixedly connected to one end of the power-carrying shaft 313 close to the axial rotating part 1. The current introduced from the outside enters the power-carrying shaft 313 through the horizontal support rod 315 on one side, and then is shunted to the shunt support rods 314 on both sides above. The current flows back from the bottom shunt support rod 314 to the horizontal support rod 315 on the other side through the electromagnetic coil 36, realizing a circuit cycle. The outer surface of the indicator light tube 312 is fixedly connected to the middle part of the outer surface of the hollow shell 311, the end of the horizontal support rod 315 away from the power-carrying shaft rod 313 extends to the outside of the hollow shell 311, and the end of the horizontal support rod 315 away from the power-carrying shaft rod 313 is fixedly connected to one end of the external connecting rod 32, and the end of the shunt support rod 314 away from the power-carrying shaft rod 313 is fixedly connected to the end of the shunt wire 33 away from the segmented slide cylinder 34.

[0035] The torque shaft 14 can drive the metal sleeves 13 on both sides to deflect synchronously in the direction of the median line of the guide shaft 12 by twisting and bending the traction rod 15, and then the metal sleeve 13 drives the corresponding side of the adapter metal tube 25 to rotate the modified rod body 2, thereby changing the actual distance between the modified rod bodies 2 on both sides to reduce the energy loss caused by electromagnetic induction. As the actual length of the modified rod body 2 changes, the hollow cushion tubes 116 on the upper and lower sides of the insulating tube 111 will also be stretched or compressed accordingly. When the hollow cushion tube 116 is compressed, the expansion top sleeve 115 will have a tendency to push the traction rubber rod 114 to move toward the side of the force disk 113 under the action of high pressure. At this time, the pressure-sensitive tube 112 is subjected to compressive stress; conversely, when the hollow cushion tube 116 is stretched, the pressure-sensitive tube 112 will be subjected to the tensile stress of the traction rubber rods 114 on both sides, thereby accurately adjusting the actual length of the modified rod body 2 according to the force value.

[0036] Since the device is a current transformer component for small currents, the current passed into the device is generally small. If the current is unstable or the current passed into the device is large, the energized shafts 313 on both sides will divert part of the current to the indicator light tube 312, and change the brightness of the indicator light tube 312 as the current changes. In this way, the indicator light tube 312 can disperse the input current to ensure that the current inside the electromagnetic coil 36 is within a safe value range, and the problem of excessive current burning the electromagnetic coil 36 will not occur. The brightness of the indicator light tube 312 can serve as an indication for the operator, allowing the operator to avoid the high-voltage circuit in time, thereby achieving a safety protection effect.

[0037] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A current transformer assembly for small currents, comprising an axial rotating member (1), wherein a modified rod body (2) is symmetrically arranged on the left and right sides of the axial rotating member (1), and a switching coil (3) is sleeved on the outer surface of the modified rod body (2), characterized in that: The modified rod body (2) comprises a voltage regulating motor (21), a guide inner rod (22) is fixedly connected to the middle of the outer surface of the voltage regulating motor (21), a metal tube shell (24) is slidably connected to the side of the outer surface of the guide inner rod (22) away from the voltage regulating motor (21), and a transfer metal tube (25) is fixedly connected to the end of the inner wall of the metal tube shell (24) away from the voltage regulating motor (21); The adapter coil (3) comprises an adapter plate (31), an external connecting rod (32) is symmetrically arranged on the side of the inner cavity of the adapter plate (31) away from the axial rotating member (1), and a shunt wire (33) is evenly arranged on the side of the inner cavity of the adapter plate (31) close to the axial rotating member (1), and an electromagnetic coil (36) is fixedly connected to one end of the shunt wire (33) away from the adapter plate (31), and a segmented slide cylinder (34) is sleeved on the outer surface of the electromagnetic coil (36).

2. The current transformer assembly for small current according to claim 1, characterized in that: The axial rotating member (1) comprises a traction sleeve (11), the upper and lower ends of the traction sleeve (11) are symmetrically provided with guide shafts (12), the left and right sides of the outer surface of the guide shaft (12) are rotatably connected to metal sleeves (13), the upper surface of the metal sleeve (13) is fixedly connected to a bent traction rod (15) through a socket, and the top end of the bent traction rod (15) is rotatably connected to a torque shaft (14).

3. The current transformer assembly for small current according to claim 2, characterized in that: The number of the modified rod bodies (2) is two, the number of the transition metal tubes (25) is four, the side of the transition metal tube (25) away from the metal tube shell (24) is fixedly connected to the inner cavity of the metal sleeve shell (13), and the end of the transition metal tube (25) away from the metal tube shell (24) is rotatably connected to the middle part of the outer surface of the torque shaft (14) through an annular groove.

4. The current transformer assembly for small current according to claim 3, characterized in that: The upper and lower sides of the outer surface of the guiding inner rod (22) are sleeved with rubber washers (23), the outer surface of the rubber washers (23) is slidably connected to the inner wall of the metal tube shell (24), and the upper and lower sides of the outer surface of the guiding inner rod (22) are slidably connected to the inner wall of the metal tube shell (24) through sliding grooves.

5. The current transformer assembly for small current according to claim 4, characterized in that: The middle of the outer surface of the metal tube shell (24) is fixedly connected to one side of the inner wall of the segmented slide cylinder (34) through an annular groove, and the middle of the inner cavity of the guiding inner rod (22) is evenly provided with through openings, and the through openings extend to the outside of the segmented slide cylinder (34). The front and rear sides of the outer surface of the segmented slide cylinder (34) are fixedly connected with a protective sleeve (35), and the outer surface of the shunt wire (33) is slidably connected to the inner wall of the protective sleeve (35).

6. The current transformer assembly for small current according to claim 2, characterized in that: The traction sleeve (11) comprises an insulating sleeve (111), a pressure-sensitive sleeve (112) is fixedly connected to the middle of the inner wall of the insulating sleeve (111), a force-bearing disk (113) is fixedly connected to the upper and lower sides of the pressure-sensitive sleeve (112), a traction rubber rod (114) is fixedly connected to the axis of the outer surface of the force-bearing disk (113), an expansion top sleeve (115) is fixedly connected to the end of the traction rubber rod (114) away from the force-bearing disk (113), and hollow cushion sleeves (116) are symmetrically arranged on the upper and lower sides of the outer surface of the insulating sleeve (111).

7. The current transformer assembly for small current according to claim 6, characterized in that: One end of the hollow cushion tube (116) away from the insulating tube (111) is fixedly connected to the axis center of the outer surface of the guide shaft (12), the outer surface of the force-bearing disk (113) is fixedly connected to the inner wall of the insulating tube (111), the top end of the expansion top sleeve (115) extends to the interior of the hollow cushion tube (116) through a sleeve interface, and the bottom of the expansion top sleeve (115) is fixedly connected to the inner wall of the insulating tube (111).

8. The current transformer assembly for small current according to claim 1, characterized in that: The adapter plate (31) comprises a hollow shell (311), a current-carrying shaft (313) being fixedly connected to the axis of the inner cavity of the hollow shell (311), horizontal support rods (315) being symmetrically arranged on one side of the inner cavity of the current-carrying shaft (313), and flow-dividing support rods (314) being evenly arranged on the other side of the inner cavity of the current-carrying shaft (313), and an indicator light tube (312) being fixedly connected to one end of the current-carrying shaft (313) close to the axis rotating member (1).

9. The current transformer assembly for small current according to claim 8, characterized in that: The outer surface of the indicator light tube (312) is fixedly connected to the middle of the outer surface of the hollow shell (311); one end of the horizontal support rod (315) away from the energized shaft rod (313) extends to the outside of the hollow shell (311); and one end of the horizontal support rod (315) away from the energized shaft rod (313) is fixedly connected to one end of the external connecting rod (32); and one end of the shunt support rod (314) away from the energized shaft rod (313) is fixedly connected to one end of the shunt wire (33) away from the segmented slide cylinder (34).

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