Wiring shell of current transformer, current transformer and multi-transformer equipment

Abstract

The utility model relates to the technical field of alternating current detection, discloses a wiring shell of a current transformer, the current transformer and multi-transformer equipment, and aims to solve the problem that a coil lead and an outgoing line in the current transformer cannot be effectively fixed after being connected. The wiring shell of the current transformer comprises a base piece and a wire inserting column. At least the base piece is provided with a containing cavity and a lead opening communicated with the containing cavity, and the wire inserting column is connected with the base piece on the inner side, facing the containing cavity, of the lead opening. The wire plugging column is provided with a wire plugging blind hole along the length direction of the wire plugging column, and the wire plugging blind hole is used for plugging and fixing a leading-out wire. After the coil lead and the outgoing line are connected, the joint of the coil lead and the outgoing line is fixed through the arrangement of the wire insertion column and the wire insertion blind hole.

Description

Technical Field

[0001] This application relates to the field of AC current detection technology, specifically to a wiring housing for a current transformer, a current transformer, and a multi-transformer device. Background Technology

[0002] A current transformer is a device that uses the principle of electromagnetic induction to detect current in a circuit based on the electromagnetic field generated during current transformation. A current transformer includes a coil assembly, through which the circuit under test passes. The change in the magnetic field caused by the alternating current in the circuit induces an electromotive force (EMF) in the coil assembly. The coil assembly is connected to a measurement module via coil leads and lead-out wires connected in sequence to measure the current in the circuit under test. However, inside the current transformer, the joints of the coil leads and lead-out wires cannot be effectively fixed after connection. Vibration and pulling during prolonged use can cause the joints to detach from their designated positions, leading to breakage at the joints or the coil leads breaking, resulting in an open circuit in the secondary winding. Utility Model Content

[0003] The purpose of this application is to provide a wiring housing for a current transformer, a current transformer, and a multi-transformer device, which aims to solve the problem that the coil leads and lead wires inside the current transformer cannot be effectively fixed after connection.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] In a first aspect, some embodiments of this application provide a wiring housing for a current transformer, including a base and a terminal block. The base has a receiving cavity and a lead opening communicating with the receiving cavity. The terminal block is connected to the base with the lead opening facing the inside of the receiving cavity. Along the length of the terminal block, the terminal block has a blind insertion hole for inserting and fixing the lead wire.

[0006] Beneficial effects: By connecting the terminal block at the corresponding lead opening position within the receiving cavity, the lead wire is inserted and fixed to the end located near the receiving cavity, ensuring a secure connection between the lead wire end within the receiving cavity and the base component. This solves the problem of ineffective fixation at the joint of the coil lead and lead wire after connection within the receiving cavity, preventing the joint from detaching or falling off due to vibration and pulling during prolonged use, thus avoiding joint breakage or coil lead wire disconnection. This ensures the secondary winding of the current transformer maintains a stable conductive state during operation.

[0007] In some embodiments, a drainage opening is provided on the side of the plug post away from the lead wire opening along the radial direction of the plug blind hole, and the drainage opening communicates with the plug blind hole.

[0008] In some embodiments, the drainage opening extends from one end of the connector to the other end along the length of the connector.

[0009] In some embodiments, the base member includes a bottom wall and a side wall, with a lead wire opening located on the side wall. One end of the plug is connected to the bottom wall, and the side of the plug closest to the lead wire opening is connected to the side wall.

[0010] In some embodiments, the height of the plug post is greater than the minimum distance between the lead opening and the bottom wall along its length. Along the radial direction of the blind hole, the plug post has a wire-passing notch corresponding to the lead opening, and the wire-passing notch communicates with the blind hole.

[0011] In some embodiments, the base component has two lead openings, which are spaced apart circumferentially along the base component. There are two terminals, with one terminal corresponding to the inner side of one lead opening.

[0012] Secondly, some embodiments of this application also provide a current transformer, including a coil assembly, leads, and the wiring housing described in the first aspect. The coil assembly is installed within a receiving cavity and includes interconnected electromagnetic coils and coil leads. One end of the coil lead is connected to the lead, and the end of the lead connected to the coil lead is inserted and fixed in a blind insertion hole, while the other end of the lead is located outside the receiving cavity through a lead opening.

[0013] Beneficial effects: Since the current transformer includes the wiring enclosure described in the first aspect, the current transformer possesses all the beneficial effects of the aforementioned wiring enclosure, which will not be elaborated further here.

[0014] In some embodiments, the cavity is filled with encapsulating adhesive, the coil assembly is fixedly connected to the base component by the encapsulating adhesive, and the lead wire is fixedly connected to the terminal block by the encapsulating adhesive.

[0015] In some embodiments, the lead wire is at least one section near the receiving cavity made of rigid metal wire, and the end of the lead wire connected to the coil lead is bent and inserted into the blind hole for fixing.

[0016] Thirdly, some embodiments of this application also provide a multi-current transformer device, including a terminal block and the current transformers mentioned in the second aspect, wherein the leads of multiple current transformers are connected to the same terminal block.

[0017] Beneficial effects: Since the multi-transformer device includes the current transformer mentioned above, it possesses all the beneficial effects of the current transformer mentioned above, which will not be repeated here.

[0018] In addition, by setting up terminals to connect to the leads of multiple current transformers, multiple current transformers can be connected and assembled with multiple measuring devices on the circuit board through the terminals, which facilitates the connection and installation of multiple current transformers. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional structural diagram of a current transformer and wiring terminals provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 An exploded view of the current transformer shown in the image;

[0022] Figure 3 for Figure 1 Another exploded view of the current transformer shown;

[0023] Figure 4 for Figure 3 A schematic diagram of a connection structure between the base component and the wiring terminal shown in the figure;

[0024] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle;

[0025] Figure 6 for Figure 1 A cross-sectional view of the current transformer shown in the figure;

[0026] Figure 7 for Figure 6 A magnified view of a portion of point B in the middle;

[0027] Figure 8 This is a three-dimensional structural diagram of a multi-transformer device provided in an embodiment of this application.

[0028] Figure label:

[0029] 1000, Multiple current transformer equipment;

[0030] 100. Current transformer;

[0031] 10. Wiring housing; 11. Base component; 111. Lead wire opening; 112. Bottom wall; 113. Side wall; 12. Receiving cavity; 13. Buckle component; 14. Plug post; 141. Plug blind hole; 142. Drainage opening; 143. Wire passage notch;

[0032] 20. Coil assembly; 21. Electromagnetic coil; 22. Coil leads; 23. Magnetic core; 24. Bracket; 25. Buffer pad; 26. Insulating tape;

[0033] 30. Lead wire;

[0034] 200. Terminal block. Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0040] A relay is an electronic control device widely used in automatic control circuits to switch circuits on and off. For example, in a relay, by controlling the signal voltage applied to the electromagnetic coil, the armature is controlled to perform a corresponding action, thereby causing the moving spring to contact the stationary spring support to either connect or disconnect, thus controlling the circuit's on or off state.

[0041] The following is combined Figures 1 to 8 This application describes the wiring housing, current transformer, and multi-transformer device of the current transformer provided, in order to at least solve the problem that the coil leads and lead wires inside the current transformer cannot be effectively fixed after connection.

[0042] On the one hand, such as Figure 1 and Figure 2 As shown, Figure 1 This is a three-dimensional structural diagram of the current transformer 100 and the terminal block 200 provided in an embodiment of this application. Figure 2 for Figure 1 An exploded view of a current transformer 100 is shown. The current transformer 100 includes a housing 10, a coil assembly 20, and leads 30. The coil assembly 20 includes an electromagnetic coil 21 and coil leads 22 connected to each other, and is installed inside the housing 10. One end of the coil lead 22 is connected to one end of the lead 30, which is located inside the housing 10, and the other end of the lead 30 passes through the housing 10 for connection to a current measuring device.

[0043] Thus, by passing the circuit under test through the inner side of the wiring housing 10 (or the electromagnetic coil 21), this inner side can be considered as a detection hole. The change in alternating current in the circuit under test will induce an electromotive force in the electromagnetic coil 21. Since the electromagnetic coil 21, coil leads 22, lead wires 30 and the current measuring device form a closed loop, the induced current flows through the electromagnetic coil 21, coil leads 22 and lead wires 30 through the measuring device, so that the measuring device can obtain the actual current in the circuit under test by detecting the induced current and converting it with the corresponding coefficient.

[0044] In this way, by setting up the current transformer 100, the actual current in the circuit under test can be accurately detected, and since there is no need to connect the measuring circuit in series with the circuit under test, the circuit under test (high voltage side) can be electrically isolated from the detection circuit (low voltage side). This is beneficial to improving the safety of the measuring equipment and the ease of operation.

[0045] In some embodiments, such as Figure 2 and Figure 3 As shown, Figure 3 for Figure 1 Another exploded view of the current transformer 100 shown. The wiring housing 10 may include a base member 11, which has a receiving cavity 12 for mounting the coil assembly 20.

[0046] The wiring housing 10 (or base component) can be an integral component. During the assembly of the current transformer 100, the wiring housing 10 consists of two separate independent components to form the receiving cavity 12. After the current transformer 100 is assembled, the two separate components can be bonded, hot-melt welded or ultrasonically welded to form an integral wiring housing 10 to avoid safety accidents caused by user disassembly.

[0047] Alternatively, the wiring housing 10 can also be a separate component, such as... Figure 2 and Figure 3 As shown, the wiring housing 10 also includes a retaining member 13. This retaining member 13 can be a cover-type structure, in which case the receiving cavity 12 is opened within the base member 11, and the receiving cavity 12 is closed by a detachable connection between the retaining member 13 and the base member 11. Alternatively, the receiving cavity 12 can be partially opened on one side of the base member 11, and another part of the receiving cavity 12 can be opened on the side of the retaining member 13 facing the base member 11. Similarly, the detachably connected base member 11 and retaining member 13 can form a closed receiving cavity 12.

[0048] When connecting the base component 11 and the buckle component 13, a snap-fit ​​or screw connection can be used for a detachable connection between the two components.

[0049] Based on this, such as Figure 4and Figure 5 As shown, Figure 4 for Figure 3 The diagram shows a connection structure between the base component and the terminal block. Figure 5 for Figure 4 A partially enlarged schematic diagram at point A. To address the aforementioned issues, the wiring housing 10 further includes a connector 14. The base component 11 has a lead wire opening 111 communicating with the receiving cavity 12. The connector 14 is connected to the base component 11 on the inner side of the lead wire opening 111 facing the receiving cavity 12. Along the length of the connector 14, the connector 14 has a blind insertion hole 141, which is used to insert and fix the lead wire 30.

[0050] For example, such as Figure 5 As shown, one end of the lead wire 30 connected to the coil lead wire 22 is inserted and fixed in the blind hole 141, and the other end of the lead wire 30 is located outside the receiving cavity 12 through the lead wire opening 111, for connecting to measuring equipment.

[0051] Thus, by connecting the insertion post 14 at the position corresponding to the lead wire opening 111 within the receiving cavity 12, the lead wire 30 is inserted and fixed near the end located within the receiving cavity 12, ensuring that the end of the lead wire 30 within the receiving cavity 12 can be securely connected to the base component 11 via the insertion post 14. The lead wire 30 and the insertion post 14 can be fixed by means of adhesive, hot melt bonding, or screw fixing. This solves the problem that the connection between the coil lead 22 and the lead wire 30 cannot be effectively fixed within the receiving cavity 12 after connection, preventing the connection from detaching or falling off due to vibration and pulling during long-term use, thus avoiding breakage of the connection or disconnection of the coil lead 22. This ensures that the secondary winding of the current transformer 100 maintains a stable conductive state during operation.

[0052] like Figure 5 As shown, the length direction of the connector 14 can be parallel to the axis of the electromagnetic coil 21 or the base 11, i.e., the Z direction. Alternatively, the angle between the length direction of the connector 14 and the Z direction can be an acute angle, which is not limited.

[0053] In some embodiments, at least a section of the lead wire 30 near the receiving cavity 12 is made of rigid metal wire. The end of the lead wire 30 connected to the coil lead 22 is bent and inserted into the blind insertion hole 141.

[0054] For example, the coil lead 22 can be wound around one end of the lead wire 30 to make an electrical connection between the two. The joint between the two can then be fixed by soldering. After soldering, one end of the lead wire 30 at the joint can be bent and inserted into the blind hole 141 along the axis of the blind hole 141 for fixation.

[0055] Since the lead wire 30 is a rigid metal wire, after the bent lead wire 30 is inserted into the blind hole 141 along the axial direction (such as the Z direction) of the blind hole 141, it passes through the side wall of the blind hole 141 (or the radial direction of the base part 11) to prevent the connector from being dislodged from the receiving cavity 12 under vibration or pulling, thereby causing the coil lead wire 22 or the connector to break.

[0056] After the coil lead 22 is wound around one end of the lead wire 30, the two can be fixedly connected by soldering. The joint fixed by soldering has greater rigidity, so as to be stably inserted and fixed in the blind hole 141 after bending.

[0057] In some embodiments, the cavity 12 is filled with encapsulating adhesive, the coil assembly 20 is fixedly connected to the base 11 by the encapsulating adhesive, and the lead wire 30 is fixedly connected to the plug post 14 by the encapsulating adhesive.

[0058] By filling the receiving cavity 12 with encapsulating adhesive, the coil assembly 20 is fixedly connected to the base component 11, thereby preventing the coil assembly 20 from shaking within the receiving cavity 12 during daily use and improving the stability of the product equipment. Furthermore, some of the encapsulating adhesive solidifies near the connector 14, such as filling the blind insertion hole 141, so that the base component 11 is fixedly connected to one end of the lead wire 30 via the connector 14, thus preventing the connector of the lead wire 30 from detaching from the receiving cavity and causing the coil lead to break. Moreover, by encapsulating and fixing the lead wire 30 with encapsulating adhesive, there is no need to install additional connectors or other fixing components at the connector 14, resulting in a simple structure and simplified assembly process.

[0059] In some embodiments, such as Figure 5 As shown, along the radial direction of the blind hole 141, the plug post 14 is provided with a drainage opening 142 on the side away from the lead opening 111. The drainage opening 142 communicates with the blind hole 141 to conduct the blind hole 141 and the receiving cavity 12 in the radial direction.

[0060] Thus, during the process of filling the encapsulating adhesive into the receiving cavity 12, the uncured encapsulating adhesive can flow into the wire blind hole 141 through the lower drainage opening 142, so that the connector of the lead wire 30 and the coil lead wire 22 in the wire blind hole 141 is fixedly connected to the inner wall of the wire blind hole 141.

[0061] Among them, continue to refer to Figure 5 Along the length direction of the plug post 14 (such as the Z direction), the drainage opening extends from one end of the plug post 14 to the other end of the plug post 14.

[0062] Taking the end of the plug post 14 connected to the base member 11 along the Z direction as the lower end, and the end of the plug post 14 with the plug blind hole 141 as the upper end, the side of the plug post 14 facing the lead wire opening 111 along the radial direction of the base member 11 as its outer side, and the side of the plug post 14 facing the electromagnetic coil 21 along the radial direction of the base member 11 as its inner side as its inner side.

[0063] The inner side of the plug post 14 is provided with a drainage opening 142. By setting the drainage opening 142 to extend from the upper end of the plug post 14 to the lower end of the plug post 14, when encapsulating adhesive is added into the receiving cavity 12 and the liquid level of the encapsulating adhesive rises from bottom to top, the encapsulating adhesive can flow into the plug blind hole 141 through the drainage opening 142 at the lower position and gradually fill the internal space of the plug blind hole 141, thereby filling the gap between the connector and the inner wall of the plug blind hole 141, so that the solidified encapsulating adhesive can effectively fix the lead wire 30 and the coil lead wire 22 in the plug blind hole 141.

[0064] In some embodiments, such as Figure 4 and Figure 5 As shown, the base component 11 includes a bottom wall 112 and a side wall 113, with a lead wire opening 111 disposed at the side wall 113. One end of the plug post 14 along its length direction is fixedly connected to the bottom wall, and the side of the plug post 14 near the lead wire opening 111 is connected to the side wall 113.

[0065] That is, by setting the lower end of the plug post 14 to be fixedly connected to the bottom wall 112, and the outer side of the plug post 14 to be fixedly connected to the side wall 113 at the edge of the lead wire opening 111, the fixed connection strength between the plug post 14 and the base member 11 in the receiving cavity 12 is improved, thereby avoiding the situation where the plug post 14 breaks due to the pulling of the lead wire 30.

[0066] Understandably, by filling the cavity 12 with encapsulating adhesive, the encapsulating adhesive that solidifies around the terminal block 14 can further increase the fixed connection strength between the terminal block 14 and the base member 11.

[0067] For example, such as Figure 5 As shown, along the Z direction, the height of the insertion post 14 is greater than the minimum distance between the lead wire opening 111 and the bottom wall 112. Along the radial direction of the insertion blind hole 141, the insertion post 14 is provided with a wire passage notch 143 corresponding to the lead wire opening, and the wire passage notch is connected to the insertion blind hole 141.

[0068] With the wire pass-through notch 143 provided, the lead wire 30 can be embedded in the wire pass-through notch 143 between the wire insertion blind hole 141 and the lead wire opening 111, so as to be supported and fixed by the side walls of the wire insertion posts 14 on both sides, which helps to improve the connection stability between the lead wire 30 and the wire insertion post 14.

[0069] It should be noted that in the above scheme, the lead wire 30 inserted into the blind socket 141 is fixedly connected to the socket post 14 by the applied encapsulating adhesive. Alternatively, the two can be fixedly connected in other ways.

[0070] For example, the blind hole 141 can be configured as a threaded hole structure. After the connector of the lead wire 30 and the coil lead wire 22 is inserted into the blind hole 141, a bolt or screw can be screwed into the blind hole 141 to compress and fix the connector of the lead wire 30 and the coil lead wire 22 in the blind hole 141, thereby preventing the lead wire 30 from coming off the plug post 14.

[0071] Alternatively, after inserting the lead wire 30 into the blind hole 141 at the joint of the lead wire 30 and the coil lead wire 22, the joint and the plug post 14 can be fixed by heat fusion or welding. There is no limitation on this.

[0072] In some embodiments, such as Figure 6 and Figure 7 As shown, Figure 6 for Figure 1 A cross-sectional view of the current transformer shown. Figure 7 for Figure 6 A partially enlarged schematic diagram at point B. The coil assembly 20 also includes a magnetic core 23, a bracket 24, buffer pads 25, and insulating tape 26. The annular magnetic core 23 is mounted inside the bracket 24. Buffer pads 25 are provided on at least two opposite sides of the magnetic core 23 along the axial direction of the base member 11 to absorb axial vibrations. The electromagnetic coil 21 is wound around the outside of the bracket 24 to increase the magnetic flux generated by the changing current in the circuit under test through the arrangement of the magnetic core 23, thereby improving the sensitivity and accuracy of the current transformer 100.

[0073] Among them, two buffer pads 25 can be arranged axially on the upper and lower sides of the magnetic core 23. If the number of buffer pads 25 is four, then two buffer pads 25 can be arranged radially on the inner and outer sides of the magnetic core 23, which can play a role in vibration reduction and buffering of the magnetic core 23.

[0074] It should be noted that, Figure 7 The electromagnetic coil 21 shown is a simplified schematic diagram. In reality, the electromagnetic coil 21 is a winding of enameled wire or insulated wire wound around the magnetic core 23. The two ends of the electromagnetic coil 21 are electrically connected to the lead wire 30 through the coil lead 22 to output induced current to the detection device.

[0075] Insulating tape 26 is wrapped around the outside of the electromagnetic coil 21 to fix and protect it, preventing scratches during coil assembly 20 that could reduce insulation performance. The insulating tape 26 also further enhances the insulation of the electromagnetic coil 21.

[0076] On the other hand, such as Figure 8 As shown, Figure 8 This is a three-dimensional structural diagram of a multi-current transformer device 1000 provided in an embodiment of this application. The multi-current transformer device 1000 includes a terminal block 200 and a plurality of current transformers 100, and the leads 30 of the plurality of current transformers 100 are connected to the same terminal block 200.

[0077] Since the multi-transformer device 1000 includes the current transformer 100 mentioned above, the multi-transformer device 1000 possesses all the beneficial effects of the current transformer 100, which will not be repeated here.

[0078] In addition, by setting the terminal block 200 to connect with the lead wires 30 of multiple current transformers 100, the multiple current transformers 100 can be plugged into and assembled with multiple measuring devices on the circuit board through the terminal block 200, which facilitates the connection and installation of multiple current transformers 100.

[0079] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0080] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A terminal enclosure for a current transformer, characterized by, The application relates to a wire connection shell. The wire connection shell comprises a base piece (11) provided with a containing cavity (12) and a lead opening (111) in communication with the containing cavity (12); and a wire insertion column (14) connected with the base piece (11) at the inner side of the lead opening (111) towards the containing cavity (12); the wire insertion column (14) is provided with a wire insertion blind hole (141) along the length direction of the wire insertion column (14), and the wire insertion blind hole (141) is used for inserting and fixing a lead-out wire (30). The wire insertion column (14) is provided with a lead flow opening (142) on the side away from the lead opening (111) along the radial direction of the wire insertion blind hole (141), and the lead flow opening (142) is in communication with the wire insertion blind hole (141).

2. The current transformer terminal enclosure of claim 1, wherein, The lead flow opening (142) is arranged from one end of the wire insertion column (14) to the other end of the wire insertion column (14) along the length direction of the wire insertion column (14).

3. The current transformer terminal enclosure of claim 2, wherein, The base piece (11) comprises a bottom wall (112) and a side wall (113), and the lead opening (111) is arranged at the side wall (113); 4. The current transformer terminal enclosure of any one of claims 1 to 3, wherein, One end of the wire insertion column (14) is connected with the bottom wall (112), and the side of the wire insertion column (14) close to the lead opening (111) is connected with the side wall (113). The height dimension of the wire insertion column (14) is greater than the minimum spacing dimension between the lead opening (111) and the bottom wall (112) along the length direction of the wire insertion column (14); 5. The current transformer terminal enclosure of claim 4, wherein, The wire insertion column (14) is provided with a wire passing gap (143) corresponding to the lead opening (111) along the radial direction of the wire insertion blind hole (141), and the wire passing gap (143) is in communication with the wire insertion blind hole (141). The base piece (11) is provided with two lead openings (111), and the two lead openings (111) are distributed at intervals along the circumference of the base piece (11); 6. The current transformer terminal enclosure of any one of claims 1 to 3, wherein, The number of the wire insertion columns (14) is two, and one wire insertion column (14) is arranged at the inner side of one lead opening (111). The application relates to a wire connection shell.

7. A current transformer characterized by The wire connection shell comprises a base piece (11) provided with a containing cavity (12) and a lead opening (111) in communication with the containing cavity (12); and a wire insertion column (14) connected with the base piece (11) at the inner side of the lead opening (111) towards the containing cavity (12); the wire insertion column (14) is provided with a wire insertion blind hole (141) along the length direction of the wire insertion column (14), and the wire insertion blind hole (141) is used for inserting and fixing a lead-out wire (30). The wire connection shell comprises a base piece (11) provided with a containing cavity (12) and a lead opening (111) in communication with the containing cavity (12); and a wire insertion column (14) connected with the base piece (11) at the inner side of the lead opening (111) towards the containing cavity (12); the wire insertion column (14) is provided with a wire insertion blind hole (141) along the length direction of the wire insertion column (14), and the wire insertion blind hole (141) is used for inserting and fixing a lead-out wire (30). The containing cavity (12) is filled with encapsulation glue, the coil assembly (20) is fixedly connected with the base piece (11) through the encapsulation glue, and the lead-out wire (30) is fixedly connected with the wire insertion column (14) through the encapsulation glue. ​ 8. The current transformer of claim 7, wherein, ​ 9. The current transformer of claim 7, wherein, The lead-out wire (30) is a metal hard wire at least in a section close to the accommodating cavity (12), and one end of the coil lead wire (22) is bent and inserted and fixed in the wire insertion blind hole (141).

10. A multi- transformer device, characterized by Comprising: a wiring terminal (200); and a plurality of current transformers as claimed in any one of claims 7 to 9, the lead-out wires (30) of the plurality of current transformers being connected at the same wiring terminal (200). ​

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