Current transformer

Abstract

The present invention relates to a current transformer, comprising a shell and a plurality of clamping members, wherein the shell has mounting positions communicating with two opposite axial sides of the shell, the plurality of clamping members are spaced and matched with the shell along the circumference of the shell, the plurality of clamping members jointly define a clamping position coaxial with the mounting position, the clamping position is used to clamp a cable, and the cable can be installed in the clamping position so that the cable and the current transformer can adaptively maintain a high degree of concentricity; the plurality of clamping members can move in the radial direction while moving in the axial direction of the shell to increase or decrease the diameter of the clamping position, so that the current transformer can perform stepless adjustment on the clamping position, so that cables with various diameters can be adapted and installed.

Description

Technical Field

[0001] The invention relates to the field of cable operation monitoring and diagnosis, and in particular to a current transformer. Background Art

[0002] In order to ensure the safe and economical operation of the power system, the operation of the cable must be monitored and measured. However, general measurement and protection devices cannot be directly connected to primary high-voltage equipment, so it is necessary to use a current transformer to convert the large current of the primary system into a small current in proportion. The current transformer can convert high voltage or large current into a standard low voltage (100V) or a standard small current (5A or 10A, both refer to the rated value) in proportion and then supply it to the measuring instrument, etc., so as to achieve the standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment. Current transformers can also be used to isolate high-voltage systems to ensure the safety of people and equipment.

[0003] The current transformer structure used in high-voltage transmission cables is generally installed in a ring shape around the cable, but the installation accuracy of existing current transformers at the project site is generally not high, and it is difficult to install the ring-shaped current transformer and the cable with a high concentricity. Generally, there will be 10% eccentricity, or very complex high-precision installation fixtures are required during installation to ensure that the current transformer and the cable have a high concentricity during installation. Furthermore, the diameter specification range of the cable is very large, and the existing current transformer has low adaptability and cannot adapt to a wide range of cable models with different diameters at the same time, and cannot be infinitely adjusted. Summary of the invention

[0004] Based on this, it is necessary to provide a current transformer to address the problem that the existing current transformer and the cable cannot maintain a high degree of concentricity during installation and cannot be adjusted steplessly to adapt to cables of different diameters. The purpose is to enable the current transformer to not only maintain a high degree of concentricity with the cable when installed, but also to be able to perform stepless adjustment so that it can adapt to cables of various diameters.

[0005] According to one aspect of the present application, a current transformer is provided, comprising:

[0006] A housing having mounting positions communicating with two axially opposite sides of the housing;

[0007] A plurality of clamping members, wherein the plurality of clamping members are spaced and connected to the shell along the circumference of the shell;

[0008] The plurality of clamping members jointly define a clamping position coaxial with the installation position, the clamping position being used to clamp a cable, and each of the clamping members can move radially while moving along the axial direction of the housing to increase or decrease the diameter of the clamping position.

[0009] In one of the embodiments, the current transformer further includes a first binding band, which bundles all the clamping members along the circumferential direction to limit the relative movement between the clamping members and the housing.

[0010] In one embodiment, each of the clamping members is provided with a first threading hole, and the first binding belt passes through the first threading hole of each of the clamping members in sequence to tie up the clamping members.

[0011] In one embodiment, the current transformer further comprises a plurality of sliders, which are arranged on the housing at intervals along the circumferential direction, and each of the clamping members is coupled to the housing via one of the sliders;

[0012] The clamping member cooperates with the inclined surface of the slider so that the clamping member moves in the radial direction of the housing while sliding in the axial direction of the housing.

[0013] In one of the embodiments, one of the corresponding clamping member and the sliding block is provided with an inclined groove extending obliquely relative to the axial direction of the shell, and the other of the corresponding clamping member and the sliding block is at least partially confined in the inclined groove and can slide reciprocatingly in the inclined groove.

[0014] In one embodiment, the clamping member or the sliding block at least partially limited in the inclined groove has a guide surface contacting the inclined groove, the guide surface extends obliquely relative to the axial direction of the shell, and the extension direction of the guide surface is the same as the extension direction of the inclined groove.

[0015] In one embodiment, the extension directions of all the inclined slots converge toward the central axis of the shell.

[0016] In one of the embodiments, the current transformer further includes a second binding belt, which is used to bundle the single clamp and the slider installed correspondingly thereto to limit the relative movement between the clamp and the housing.

[0017] In one embodiment, the clamping member has a second threading hole at one end in the axial direction of the shell, the slider has a recessed portion at one end away from the second threading hole, and the second restraining belt passes through the threading hole and is confined in the recessed portion.

[0018] In one of the embodiments, the housing comprises two sub-housings, wherein one end of one of the sub-housings is movably connected to one end of the other sub-housing, and one of the sub-housings is capable of rotating relative to the other sub-housing to switch between an open state and a closed state;

[0019] When the two sub-shells are in the closed state, the two sub-shells enclose the installation position.

[0020] The above-mentioned current transformer is fixed to the shell by arranging multiple sliders, and a guide surface is arranged on each slider, which extends obliquely from one axial side of the shell to the other side. At the same time, multiple clamping members are arranged, and each clamping member is provided with an inclined groove consistent with the inclined direction of the above-mentioned guide surface, so that the guide surface is limited in the inclined groove, so that the multiple clamping members can form a clamping position coaxial with the shell, and then the cable can be installed in the clamping position so that the cable and the current transformer can adaptively maintain a high degree of concentricity; at the same time, the multiple clamping members can move simultaneously along the radial and axial directions of the shell, so that the clamping position can be increased or decreased, so that the above-mentioned current transformer can perform stepless adjustment on the clamping position, so that it can adapt to the installation of cables of various different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A three-dimensional schematic diagram of a current transformer provided by an embodiment of the present invention;

[0023] Figure 2 A three-dimensional schematic diagram of the current transformer provided by an embodiment of the present invention and a cable of a certain diameter specification when installed;

[0024] Figure 3 A three-dimensional schematic diagram of the current transformer provided by an embodiment of the present invention when installed with a cable of another diameter specification;

[0025] Figure 4 An exploded schematic diagram of a housing provided in an embodiment of the present invention when it is in an open state;

[0026] Figure 5 A three-dimensional schematic diagram of a slider provided by an embodiment of the present invention;

[0027] Figure 6 A three-dimensional schematic diagram of a clamping member provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0029] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “liquid level”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher liquid level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower liquid level than the second feature.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "liquid horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0034] As described in the background technology, in order to ensure the safe and economical operation of the power system, the operation of the cable must be monitored and measured, but general measurement and protection devices cannot be directly connected to the primary high-voltage equipment. Therefore, it is necessary to use a current transformer to proportionally convert the large current of the primary system into a small current and then supply it to measuring instruments, etc., so as to achieve standardization and miniaturization of measuring instruments, protection equipment and automatic control equipment.

[0035] The inventors of the present invention have noticed that the current transformer structure used for high-voltage transmission cables is generally installed around the cable in a ring-shaped form. A plurality of clamping members are arranged in the circumference of the ring-shaped current transformer so that the plurality of clamping members together form a clamping position for clamping the cable. However, the installation accuracy of the existing current transformer at the construction site makes it difficult to keep the cable clamped in the above-mentioned clamping position and the ring-shaped current transformer installed with a high degree of concentricity; and the size of the above-mentioned clamping position cannot usually be adjusted, which makes the existing cable transformer poorly adaptable. When cables of different diameters need to be installed, the original current transformer cannot be installed, and the current transformer and the cable of the new diameter can only be replaced and reinstalled.

[0036] In order to solve this problem, the inventors have designed an adjustable current transformer after in-depth research. A plurality of clamping members are used to form a clamping position coaxial with the current transformer, and the plurality of clamping members can be moved simultaneously to change the diameter of the clamping position, thereby achieving high-precision coaxial installation of the current transformer and the cable and stepless adjustment of the current transformer to adapt to cables of different diameters.

[0037] The current transformer disclosed in this embodiment is only used as an example for illustration and does not limit the technical scope of this application. It is understood that in other embodiments, the current transformer can also be used to install other high-voltage power transmission facilities, which is not limited here.

[0038] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0039] like Figures 1 to 3As shown, a current transformer 10 includes a shell 100, a plurality of sliders 200, a plurality of clamping members 300, a first restraining band 400 and a plurality of second restraining bands 500. The plurality of sliders 200 are arranged at intervals along the circumference of the shell 100 and are disposed on the shell 100. Each clamping member 300 is installed on a slider 200 so that the plurality of clamping members 300 are also arranged at intervals along the circumference of the shell 100. The plurality of clamping members 300 are used to form a clamping position coaxial with the shell 100, and the clamping position is used to clamp the outer peripheral surface of the cable 20. Each clamping member 300 can move radially while moving axially along the shell 100 relative to a slider 200 so that the diameter of the clamping position is increased or decreased to adapt to the installation of cables 20 of different diameter specifications. When the cable 20 is installed in the clamping position, the first binding belt 400 is used to bundle all the clamping members 300 to tighten the clamping position, thereby limiting the relative displacement between the clamping member 300 and the slider 200, so that the cable 20 can be fixedly installed in the clamping position coaxially with the housing 100. The second binding belt 500 is used to bundle a single clamping member 300 and the slider 200 installed corresponding to the clamping member 300 together to further limit the relative movement of the clamping member 300 and the housing 100.

[0040] In some embodiments, Figure 1 and Figure 4 As shown, the shell 100 is a hollow shell 100 in the shape of a ring. The shell 100 includes two semicircular sub-shells 110 and a connector 120. One end of one sub-shell 110 is movably connected to one end of the other sub-shell 110 through the connector 120. One of the sub-shells 110 can rotate relative to the other sub-shell 110 with the axial direction of the connector 120 as the rotation axis, so that the two sub-shells 110 are opened or closed. When the two sub-shells 110 are closed, the two sub-shells 110 are locked with each other and enclosed into a ring-shaped shell 100. The ring-shaped shell 100 has installation positions on opposite sides of the axial direction of the shell 100. The purpose of designing the shell 100 as an openable or closed structure is to facilitate installation. When the length of the cable is several kilometers, Figure 2 and Figure 3 As shown, the cable 20 can be inserted into the installation position by opening the two sub-housings 110, so that the housing 100 can be installed around the cable 20, and the cable 20 does not need to pass from one side of the housing 100 to the other side to be installed, thereby realizing flexible and convenient installation of the cable 20 and the current transformer 10. The connecting member 120 here can be a pin, a hinge or a hinge, etc., which is not limited here.

[0041] In some embodiments, Figure 4As shown, each sub-shell 110 includes a semicircular main body 111 and a semicircular upper cover 112. The main body 111 has a semicircular accommodating cavity. The accommodating cavity is open at one end along the axial direction of the main body 111. The accommodating cavity is used to accommodate the coil and sensor of the current transformer 10. The upper cover 112 is covered on the open end of the accommodating cavity by a plurality of screws to close the open end of the accommodating cavity.

[0042] Please continue reading Figure 1 In some embodiments, there are four sliders 200, which are arranged on the side wall of the installation position at equal intervals along the circumference of the shell 100. Each slider 200 is roughly a right triangle. One end of the slider 200 along the radial direction of the shell 100 is a vertical surface, which is fixed to the side wall of the installation position. The other end of the slider 200 along the radial direction of the shell 100 has an inclined extending guide surface 201. The guide surface 201 is used to cooperate with the clamping member 300. In the direction from one side of the shell 100 along the axial direction to the other side, the guide surfaces 201 of all sliders 200 extend toward the central axis of the shell 100 and converge at the same point.

[0043] In some embodiments, Figure 5 As shown, the end face of the slider 200 at one end along the axial direction of the shell 100 is also provided with a recessed portion 202 and a triangular protrusion 203, and the recessed portion 202 is located between the shell 100 and the protrusion 203. The purpose of providing the recessed portion 202 and the protrusion 203 is that when the second restraining belt 500 is used to bind a slider 200 and its corresponding clamping member 300, one end of the second restraining belt 500 can be limited in the recessed portion 202 and will not slip off to separate from the slider 200, so that the slider 200 and the clamping member 300 can be firmly bound together.

[0044] In some embodiments, Figure 6 As shown, the number of the clamping members 300 corresponds to the number of the sliders 200, and there are four of them. Each clamping member 300 includes a clamping plate 310, a connecting plate 320 and a reinforcing plate 330. The clamping plate 310 is used to clamp the cable 20, the connecting plate 320 is used to cooperate with the slider 200, and the reinforcing plate 330 is used to support and strengthen. One end of the clamping plate 310 along the length direction is vertically fixed to one end of the reinforcing plate 330 along the length direction. The connecting plate 320 is a right triangle, wherein the two end faces where the two right-angled sides in the triangular cross section of the connecting plate 320 are respectively fixed to the clamping plate 310 and the reinforcing plate 330, and the end face where the hypotenuse in the triangular cross section of the connecting plate 320 is used to cooperate with the inclined guide surface 201 of the slider 200. When the clamping member 300 is installed on the slider 200, the length direction of the clamping plate 310 is consistent with the axial direction of the housing 100, and the length direction of the reinforcing plate 330 is consistent with the radial direction of the housing 100.

[0045] Specifically, in a preferred embodiment, Figure 2 , Figure 3 and Figure 6 As shown, the side of the clamping plate 310 away from the connecting plate 320 is an arc surface, the axial direction of the arc surface is consistent with the axial direction of the housing 100, and the arc surfaces of all the clamping plates 310 jointly define a circular clamping position. When the cylindrical cable is clamped in the clamping position, the center of the cross section of the cable 20 in the axial direction coincides with the center of the clamping position. In some embodiments, a plurality of spaced-apart dot-shaped anti-slip protrusions 203 can also be provided on the arc surface, so that the cable 20 will not slip when clamped in the clamping position, and can be clamped more firmly by the clamping member 300.

[0046] Please continue reading Figure 2 , Figure 3 and Figure 6 In a preferred embodiment, the end face where the hypotenuse in the triangular cross-section of the connecting plate 320 is located is provided with an inwardly recessed long strip-shaped oblique groove 321, and the oblique groove 321 is used to allow the guide surface 201 of the slider 200 to be limited in the oblique groove 321 and slide in the oblique groove 321 when the slider 200 is installed with the clamping member 300. One end of the connecting plate 320 close to the clamping plate 310 is also provided with a plurality of first threading holes 322 which are arranged at intervals along the length direction of the clamping plate 310 and connected to the opposite sides in the thickness direction of the connecting plate 320. The first threading holes 322 are used to thread the first restraining band 400. When the cable 20 is clamped in the clamping position and the first restraining band 400 is passed through the first threading holes 322 of all the clamping members 300, the first restraining band 400 surrounds all the clamping members 300 and the outer peripheral surface of the cable 20 along the circumference of the clamping position formed by the plurality of clamping members 300. The first restraining band 400 can be tightened to reduce the diameter of the clamping position to limit the relative movement of the clamping member 300 and the shell 100, so that the cable 20 can be firmly installed in the clamping position. In addition, in a more preferred embodiment, the connecting plate 320 is further provided with a plurality of weight-reducing holes 323 which are arranged at intervals and connected to both sides of the connecting plate 320 in the thickness direction, so as to reduce the weight of the current transformer 10 and save manufacturing costs.

[0047] In a preferred embodiment, if Figure 6As shown, the reinforcing plate 330 is provided with two second threading holes 331 connecting the two sides of the reinforcing plate 330 in the thickness direction, and the two second threading holes 331 are located on both sides of the connecting plate 320. The second threading holes 331 are used to thread the second restraining belt 500. When a second restraining belt 500 is used to bundle a clamping member 300 and a corresponding slider 200 matched therewith, one end of the second restraining belt 500 passes through one of the second threading holes 331, and the other end passes through the other second threading hole 331. After the two ends pass through the second threading holes 331 respectively, they extend to the top of the recessed portion 202 of the slider 200 at the same time and are connected and tightened, so that the second restraining belt 500 is in a closed ring shape to bundle the clamping member 300 and the slider 200 together, so as to further limit the relative movement of the clamping member 300 and the shell 100.

[0048] So, like Figure 2 and Figure 3 As shown, when multiple clamping members 300 are installed with the housing 100, the clamping members 300 are partially accommodated in the installation position, and each slider 200 can slide in the inclined groove 321 of the clamping member 300, so that each clamping member 300 can move simultaneously in the radial and axial directions of the housing 100. When all the clamping members 300 move relative to the housing 100, the diameter of the clamping position formed by all the clamping members 300 increases or decreases accordingly, so that cables 20 of different diameters can be installed, and the center of the axial cross section of the cable 20 is kept highly concentric with the center point of the current transformer 10. In addition, the first binding belt 400 is used to bundle all the clamping members 300 and the cables 20, and the multiple second binding belts 500 are used to bundle each clamping member 300 and the slider 200 corresponding thereto, so that the clamping member 300 and the housing 100 cannot move relative to each other, thereby realizing the firm installation of the cable 20 and the current transformer 10.

[0049] It should be noted that the number of the clamping members 300 is not limited to four, but may be more, and the first and second restraining bands 400 and 500 are not limited to cable ties, and any device that can achieve the restraining and tightening functions can be used. The matching mode between the clamping member 300 and the slider 200 is not limited to the matching form between the inclined guide surface 201 and the inclined groove 321, but may also be other matching modes with guiding functions or matching concave and convex modes. In some embodiments, the inclined groove 321 may be formed on the slider 200, and the guide surface 201 is formed on the clamping member 300 corresponding thereto.

[0050] Combination Figures 1 to 4 When the above-mentioned current transformer 10 is installed, the installation steps are as follows:

[0051] In the first step, the two sub-housings 110 are opened and covered over the cable 20 and then closed, so that the cable 20 is inserted into the installation position of the housing 100;

[0052] In the second step, the inclined grooves 321 of the multiple clamping members 300 are aligned with the corresponding guide surfaces 201 of the slider 200, so that the guide surfaces 201 are limited in the slide grooves, and the slider 200 is moved in the slide groove to adjust the positions of the clamping members 300 relative to the housing 100, so that the clamping positions formed by the multiple clamping members 300 match the diameter of the cable 20, until the multiple clamping members 300 can contact the outer circumference of the cable 20 at the same time, and the center of the axial cross section of the cable 20 coincides with the center point of the current transformer 10.

[0053] In the third step, the first binding belt 400 and the second binding belt 500 are tightened respectively to prevent the plurality of clamping members 300 from being displaced relative to the housing 100 , thereby firmly installing the cable 20 in the clamping position formed by the plurality of clamping members 300 .

[0054] At this point, the installation between the current transformer 10 and the cable 20 is completed, and the current transformer 10 adaptively maintains concentricity with the cross section of the cable 20 in the axial direction. When it is necessary to install cables 20 of different diameters, the first binding belt 400 and the second binding belt 500 are loosened, and the relative position between the clamping member 300 and the housing 100 is adjusted so that the multiple clamping members 300 form clamping positions with different diameters, and the diameter of the clamping position matches the diameter of the cable 20 to be installed separately, and then the first binding belt 400 and the second binding belt 500 are tightened to achieve stepless adjustment of the current transformer 10.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0056] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. A current transformer, characterized in that: include: A housing having mounting locations communicating with two axially opposite sides of the housing; A plurality of sliders, wherein the plurality of sliders are arranged on the housing at intervals along the circumference of the housing; A plurality of clamping members, wherein the plurality of clamping members are arranged along the circumference of the housing, and each of the clamping members cooperates with an inclined surface of the slider to be coupled to the housing through the slider; The plurality of clamping members jointly define a clamping position coaxial with the mounting position, the clamping position is used to clamp a cable, one of the corresponding clamping member and the slider is provided with an oblique groove extending obliquely relative to the axial direction of the housing, the other of the corresponding clamping member and the slider is at least partially limited in the oblique groove and can reciprocate in the oblique groove, the clamping member or the slider at least partially limited in the oblique groove has a guide surface contacting the oblique groove, the guide surface extends obliquely relative to the axial direction of the housing, and the extension direction of the guide surface is the same as the extension direction of the oblique groove, so that each of the clamping members can move in the radial direction while moving in the axial direction of the housing to increase or decrease the diameter of the clamping position; Each of the clamping members includes a clamping plate, a connecting plate and a reinforcing plate, wherein one end of the clamping plate along its own length direction is vertically fixed to one end of the reinforcing plate along its own length direction, and the connecting plate is in the form of a right-angled triangle, wherein the two end surfaces where the two right-angled sides in the triangular cross-section of the connecting plate are located are respectively fixed to the clamping plate and the reinforcing plate, and the end surface where the hypotenuse in the triangular cross-section of the connecting plate is located is used to cooperate with the inclined guide surface of the slider.

2. The current transformer according to claim 1, characterized in that: The current transformer further includes a first binding band, which bundles all the clamping members in a circumferential direction to limit the relative movement between the clamping members and the housing.

3. The current transformer according to claim 2, characterized in that: Each of the clamping members is provided with a first threading hole, and the first binding belt passes through the first threading hole of each of the clamping members in sequence to bind the clamping members.

4. The current transformer according to claim 1, characterized in that: A side of the clamping plate away from the connecting plate is an arc surface, and an axial direction of the arc surface is consistent with an axial direction of the shell.

5. The current transformer according to claim 4, characterized in that: The arc surface is provided with a plurality of spaced apart dot-shaped anti-slip protrusions.

6. The current transformer according to claim 1, characterized in that: The extension directions of all the inclined slots converge toward the central axis of the shell.

7. The current transformer according to claim 1, characterized in that: The current transformer further includes a second binding belt, which is used to bundle the single clamping member and the sliding block installed correspondingly thereto, so as to limit the relative movement between the clamping member and the housing.

8. The current transformer according to claim 7, characterized in that: The clamping member has a second threading hole at one end in the axial direction of the shell, and the slider has a recessed portion at one end away from the second threading hole. The second restraining belt passes through the threading hole and is confined in the recessed portion.

9. The current transformer according to claim 8, characterized in that: A protrusion is further provided on the end surface of one end of the sliding block along the axial direction of the housing, and the recessed portion is located between the housing and the protrusion.

10. The current transformer according to claim 1, characterized in that: The housing comprises two sub-housings, wherein one end of one of the sub-housings is movably connected to one end of the other sub-housing, and one of the sub-housings is rotatable relative to the other sub-housing to switch between an open state and a closed state; When the two sub-shells are in the closed state, the two sub-shells enclose the installation position.

Images