Current transformer and electrical equipment

Abstract

The utility model belongs to the field of current transformers, and particularly relates to a current transformer and electrical equipment. The utility model provides a current transformer in order to conveniently judge the serial and parallel connection states of the current transformer. The current transformer comprises a shell and a conductive assembly, the conductive assembly comprises an inner conductive part, an outer conductive barrel and an insulation structure located between the inner conductive part and the outer conductive barrel, the inner conductive part is rotatably matched with the insulation structure, and a series connection station and a parallel connection station are arranged in the rotation stroke of the inner conductive part; when the inner conductive piece is in the series connection station, the P1 side inner conductive terminal of the inner conductive piece is located at the highest position, and when the inner conductive piece is in the parallel connection station, the P1 side inner conductive terminal is located at the lowest position. The utility model further provides electrical equipment comprising the current transformer. As the inner conductive piece can rotate, the serial and parallel connection states of the current transformer can be conveniently judged according to the position of the inner conductive terminal on the P1 side.

Description

Technical Field

[0001] This utility model belongs to the field of current transformers, and in particular relates to a current transformer and electrical equipment. Background Technology

[0002] A current transformer is an electrical device used to change the magnitude of current. The magnitude of the current on the secondary side differs depending on whether the current transformer is connected in series or parallel.

[0003] For example, Chinese utility model patent with authorization announcement number CN201392730Y and authorization announcement date of January 27, 2010 discloses a high-voltage SF6 current transformer. The current transformer includes a shell, an iron core, and a conductive component that passes horizontally through the shell. The conductive component passes through the iron core. The conductive component includes an inner conductive rod (equivalent to an inner conductive element), an outer conductive tube (equivalent to an outer conductive cylinder), and an insulating structure located between the inner conductive plate and the outer conductive tube. The P1 side of the outer conductive tube is insulated from the shell, and the P2 side of the outer conductive tube is electrically connected to the shell.

[0004] The inner conductive rod includes a cylindrical main body and an inner conductive terminal on the P1 side, which is located on the P1 side of the main body (or on the P1 side of the inner conductive rod). The outer conductive tube has an outer conductive terminal on the P1 side, and the wiring portion of the outer conductive terminal on the P1 side is located above the outer conductive tube. The housing includes a wiring terminal on the P1 side and a wiring terminal on the P2 side, with the P1 side wiring terminal located on the P1 side of the current transformer and the P2 side wiring terminal located on the P2 side of the current transformer. Both the P1 side wiring terminal and the P2 side wiring terminal are located below the conductive components.

[0005] When the current transformers are in series, the incoming conductive element (e.g., incoming cable or incoming conductor bus) is electrically connected to the P1 side external conductive terminal of the outer conductive tube via a connector. The P1 side internal conductive terminal of the inner conductive rod is electrically connected to the P1 side wiring terminal via a connector (equivalent to the first connector). The outgoing conductive element is electrically connected to the P2 side of the inner conductive rod via a connector. The current flow direction is: incoming conductive element → P1 side of outer conductive tube → P2 side of outer conductive tube → P2 side of housing → P1 side of housing → P1 side wiring terminal → P1 side of inner conductive rod → P2 side of inner conductive rod → outgoing conductive element. At this time, if the current in the incoming conductive element is I, then the current flowing through the inside of the iron core is 2I.

[0006] When the current transformers are in parallel, the inlet conductor is electrically connected to the P1 side external conductive terminal of the outer conductive tube via a connector; the P1 side external conductive terminal of the outer conductive tube is electrically connected to the P1 side internal conductive terminal of the inner conductive rod via a connector (equivalent to a second connector); the P2 side terminal is electrically connected to the P2 side of the inner conductive rod via a connector; and the outlet conductor is electrically connected to the P2 side of the inner conductive rod via a connector. The current flows in two paths:

[0007] (1) Inlet conductive component → outer conductive tube P1 side → outer conductive tube P2 side → housing P2 side → P2 side terminal → inner conductive rod P2 side → outlet conductive component;

[0008] (2) Inlet conductive component → Outer conductive tube P1 side → Inner conductive rod P1 side → Inner conductive rod P2 side → Outlet conductive component.

[0009] At this point, let the magnitude of the current flowing into the conductive component be I, then the magnitude of the current flowing through the inside of the iron core is I.

[0010] In summary, the magnitude of the current on the secondary side of the current transformer differs depending on whether it is connected in series or parallel.

[0011] When using the above-mentioned current transformers, since the structures of the P1 side and P2 side of the current transformers are basically the same, it is difficult for on-site workers to clearly distinguish the state of the current transformers, which is not conducive to on-site management. Utility Model Content

[0012] The purpose of this invention is to provide a current transformer to solve the technical problem that existing current transformers are not easy to distinguish between series and parallel states.

[0013] The purpose of this utility model is also to provide an electrical device to solve the same technical problems mentioned above.

[0014] To achieve the above objectives, the technical solution for the current transformer provided by this utility model is as follows:

[0015] A current transformer includes a housing and a conductive assembly horizontally passing through the housing. The conductive assembly includes an inner conductive element, an outer conductive cylinder, and an insulating structure located between the inner conductive element and the outer conductive cylinder. The P1 side of the outer conductive cylinder is electrically connected to an outer conductive terminal on the P1 side for direct or indirect electrical connection to the current-injecting conductive element. The housing includes a P1 side terminal. The inner conductive element and the insulating structure are rotatably coupled, or the inner conductive element and the insulating structure are fixedly connected, and the insulating structure and the outer conductive cylinder are rotatably coupled. The rotation stroke of the inner conductive element has a series position for connecting in series with the outer conductive cylinder during use and a parallel position for connecting in parallel with the outer conductive cylinder during use.

[0016] The P1 side wiring terminal is located above the conductive component, and the wiring part of the P1 side external conductive terminal is located below the external conductive cylinder. When the internal conductive component is in the series working position, the P1 side internal conductive terminal of the internal conductive component is located at the highest point. When the internal conductive component is in the parallel working position, the P1 side internal conductive terminal is located at the lowest point.

[0017] Alternatively, the P1 side terminal is located below the conductive component, and the wiring portion of the P1 side external conductive terminal is located above the external conductive cylinder. When the internal conductive component is in a series connection position, the P1 side internal conductive terminal of the internal conductive component is located at the lowest point, and when the internal conductive component is in a parallel connection position, the P1 side internal conductive terminal is located at the highest point.

[0018] Furthermore, the insulating structure is an insulating sleeve, and the insulating sleeve is made of a self-lubricating material.

[0019] Furthermore, the housing also includes a P2 side wiring terminal, which is located below the outer conductive cylinder. The P2 side of the inner conductive component is electrically connected to the P2 side inner conductive terminal, and the wiring portion of the P2 side inner conductive terminal is located below the inner conductive component.

[0020] Furthermore, the housing is filled with an insulating gas, which consists of 20.5% nitrogen and 79.5% carbon dioxide.

[0021] Furthermore, the current transformer also includes a top plate for supporting the housing and an insulating sleeve for supporting the top plate. An iron core is provided inside the housing, and a secondary lead tube is connected to the iron core. The secondary lead tube passes vertically through the insulating sleeve and the top plate. A shielding cover is fixedly connected to the lower surface of the top plate, and the lower end of the shielding cover has an outward and upward curled part.

[0022] The beneficial effects of this current transformer are as follows: This is an improved invention. The main difference between this invention and the prior art is that in the prior art, the inner conductive component cannot rotate, while in this invention, the inner conductive component can rotate.

[0023] Based on the above differences, when actually using the current transformer of this utility model, on-site personnel only need to observe the position of the inner conductive terminal on the P1 side to easily determine the series or parallel connection state of the current transformer. For example, when the inner conductive terminal on the P1 side is at its highest (or lowest) position, the current transformer is in series. At this time, since the wiring part of the outer conductive terminal on the P1 side is located below (or above) the outer conductive cylinder, the current-infeeding conductive component will not interfere with the inner conductive terminal and the first connecting component on the P1 side. When the inner conductive terminal on the P1 side is at its lowest (or highest) position, the current transformer is in parallel. When it is necessary to change the series or parallel connection state of the current transformer, the personnel need to rotate the inner conductive component.

[0024] The technical solution for this utility model of electrical equipment is:

[0025] An electrical device includes a current transformer, a first connector, and a second connector. The current transformer includes a housing and a conductive assembly horizontally passing through the housing. The conductive assembly includes an inner conductive element, an outer conductive cylinder, and an insulating structure located between the inner conductive element and the outer conductive cylinder. The P1 side of the outer conductive cylinder is electrically connected to an outer conductive terminal on the P1 side for direct or indirect electrical connection to the current-injecting conductive element. The housing includes a P1 side terminal. The inner conductive element is rotatably engaged with the insulating structure, or the inner conductive element is fixedly connected to the insulating structure, and the insulating structure is rotatably engaged with the outer conductive cylinder. The rotational stroke of the inner conductive element has a series position for connecting in series with the outer conductive cylinder during use and a parallel position for connecting in parallel with the outer conductive cylinder during use.

[0026] The P1 side wiring terminal is located above the conductive component, and the wiring part of the P1 side external conductive terminal is located below the external conductive cylinder. When the internal conductive component is in the series working position, the P1 side internal conductive terminal of the internal conductive component is located at the highest point. When the internal conductive component is in the parallel working position, the P1 side internal conductive terminal is located at the lowest point.

[0027] Alternatively, the P1 side wiring terminal is located below the conductive component, and the wiring part of the P1 side external conductive terminal is located above the external conductive cylinder. When the internal conductive component is in a series working position, the P1 side internal conductive terminal of the internal conductive component is located at the lowest point, and when the internal conductive component is in a parallel working position, the P1 side internal conductive terminal is located at the highest point.

[0028] When the inner conductive component is in the series connection position, the first connector is used to electrically connect the inner conductive terminal on the P1 side to the terminal on the P1 side; when the inner conductive component is in the parallel connection position, the second connector is used to electrically connect the inner conductive terminal on the P1 side to the outer conductive terminal on the P1 side.

[0029] Furthermore, the insulating structure is an insulating sleeve, and the insulating sleeve is made of a self-lubricating material.

[0030] Furthermore, the housing also includes a P2 side wiring terminal, which is located below the outer conductive cylinder. The P2 side of the inner conductive component is electrically connected to the P2 side inner conductive terminal, and the wiring portion of the P2 side inner conductive terminal is located below the inner conductive component.

[0031] Furthermore, the housing is filled with an insulating gas, which consists of 20.5% nitrogen and 79.5% carbon dioxide.

[0032] Furthermore, the current transformer also includes a top plate for supporting the housing and an insulating sleeve for supporting the top plate. An iron core is provided inside the housing, and a secondary lead tube is connected to the iron core. The secondary lead tube passes vertically through the insulating sleeve and the top plate. A shielding cover is fixedly connected to the lower surface of the top plate, and the lower end of the shielding cover has an outward and upward curled part.

[0033] Furthermore, when the inner conductive component is in a parallel working position, the inner conductive terminal on the P1 side, the second connector, and the outer conductive terminal on the P1 side are fixedly connected by the same set of fasteners to realize the electrical connection between the inner conductive terminal on the P1 side, the second connector, and the outer conductive terminal on the P1 side. The second connector is used to electrically connect with the incoming conductive component to realize the indirect electrical connection between the outer conductive terminal on the P1 side and the incoming conductive component.

[0034] Furthermore, when the inner conductive component is in a parallel working position, the second connector is located between the inner conductive terminal on the P1 side and the outer conductive terminal on the P1 side.

[0035] Furthermore, the first connector includes a first horizontal portion and first vertical portions located on both sides of the first horizontal portion, each of the first vertical portions being used for electrical connection with the inner conductive terminal on the P1 side and the wiring terminal on the P1 side, respectively.

[0036] Furthermore, the second connector includes a second horizontal portion and a second vertical portion located on one side of the second horizontal portion. The second vertical portion is used for fixed connection with the inner conductive terminal and the outer conductive terminal on the P1 side, and the second horizontal portion is used for electrical connection with the incoming current conductive element.

[0037] The beneficial effects of this utility model of electrical equipment are as follows: This utility model is an improved invention. The main difference between this utility model and the prior art is that in the prior art, the inner conductive component cannot rotate, while in this utility model, the inner conductive component can rotate. Based on the above difference, when actually using the electrical equipment of this utility model, on-site personnel only need to observe the position of the inner conductive terminal on the P1 side to easily determine the series or parallel connection state of the current transformer. When it is necessary to change the series or parallel connection state of the current transformer, the personnel need to rotate the inner conductive component. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the electrical equipment of this utility model;

[0039] Figure 2 This is a schematic diagram of the current transformer in series in specific embodiment 1 of the electrical equipment of this utility model;

[0040] Figure 3 This is a schematic diagram of the current transformer in parallel connection in specific embodiment 1 of the electrical equipment of this utility model;

[0041] Figure 4 This is a schematic diagram of the current transformer in series in specific embodiment 2 of the electrical equipment of this utility model;

[0042] Figure 5 This is a schematic diagram of the current transformer in parallel connection in specific embodiment 2 of the electrical equipment of this utility model;

[0043] Explanation of reference numerals in the attached figures:

[0044] 1. Explosion-proof valve; 2. Housing; 201. P1 side terminal; 202. P2 side terminal; 3. Iron core; 4. Conductive components; 401. Inner conductive component; 4011. P1 side inner conductive terminal; 402. Outer conductive cylinder; 403. Insulating sleeve; 5. Top plate; 6. Shielding cover; 7. Insulating sleeve; 8. Secondary lead pipe; 9. Base; 10. Desiccant; 11. Air vent pipe; 12. Density meter; 13. Insulating sealing structure; 14. P1 side outer conductive terminal; 15. First connector; 16. Second connector; 17. P2 side inner conductive terminal; 18. Outgoing connector; 19. Third connector. Detailed Implementation

[0045] To address the problems in the background technology, the core inventive concept of this utility model is to enable the inner conductive component to rotate, and to enable the current transformer to be in series or parallel state when the inner conductive terminal on the P1 side of the inner conductive component is in the highest and lowest positions, respectively, thereby facilitating the operator to determine the series or parallel state of the current transformer.

[0046] The present invention will be further described in detail below with reference to the embodiments.

[0047] Specific embodiment 1 of the electrical equipment provided by this utility model:

[0048] like Figures 1-3 As shown, the electrical equipment includes a current transformer and corresponding connectors. (Refer to...) Figure 1 As shown, in one specific embodiment, the current transformer mainly includes a housing 2, an explosion-proof valve 1 installed on the housing 2, an iron core 3 located inside the housing 2, a top plate 5 for supporting the housing 2, a shielding cover 6, an insulating sleeve 7 for supporting the top plate 5, a secondary lead pipe 8, a base 9, a desiccant 10, a density gauge 12, and a gas venting pipe 11 for taking gas from the density gauge 12. The pressure value of the insulating gas inside the current transformer can be conveniently observed on site through the density gauge 12.

[0049] Of course, in other specific embodiments, the current transformer can omit structures such as the desiccant 10, the air vent 11, and the density meter 12. The main innovation of this utility model is the series-parallel structure of the current transformer. Therefore, this utility model does not restrict structures in the current transformer that are unrelated to the series-parallel structure. The series-parallel structure of the current transformer will be described in detail below.

[0050] In one basic embodiment, the current transformer includes a conductive assembly 4 horizontally passing through the housing 2. The conductive assembly 4 includes an inner conductive element 401, an outer conductive cylinder 402, and an insulating structure located between the inner conductive element 401 and the outer conductive cylinder 402. The outer conductive cylinder 402 has a P1-side external conductive terminal 14 electrically connected to its P1 side. The P1-side external conductive terminal 14 is used for direct or indirect electrical connection to the current-incoming conductive element. The housing 2 includes a P1-side terminal 201. The inner conductive element 401 is rotatably engaged with the insulating structure, and the inner conductive element 401... The rotation stroke of component 1 has a series station for connecting with the outer conductive cylinder 402 in series during use and a parallel station for connecting with the outer conductive cylinder 402 in parallel during use; the P1 side terminal 201 is located above the conductive component 4, and the wiring part of the P1 side outer conductive terminal 14 is located below the outer conductive cylinder 402. When the inner conductive component 401 is in the series station, the P1 side inner conductive terminal 4011 of the inner conductive component 401 is located at the highest point, and when the inner conductive component 401 is in the parallel station, the P1 side inner conductive terminal 4011 is located at the lowest point.

[0051] As another basic implementation method, the only difference from the above basic implementation method is that the inner conductive element 401 is fixedly connected to the insulating structure, and the insulating structure and the outer conductive cylinder 402 are rotatably coupled. At this time, the inner conductive element 401 and the insulating structure rotate synchronously.

[0052] Similar to existing technologies, an insulating sealing structure 13 (such as a sealing ring) is provided on the P1 side of the housing 2 to insulate the P1 side of the outer conductive cylinder 402 from the housing, thereby ensuring that the current on the outer conductive cylinder 402 flows into the housing 2 only after flowing through the iron core 3. The specific arrangement of the insulating sealing structure 13 is a conventional technical means in this field, and the insulating sealing structure 13 is also included in the Chinese utility model patent with authorization announcement number CN201392730Y, so it will not be described again here.

[0053] The inner conductive component 401 further includes an inner conductive rod, with the inner conductive terminal 4011 on the P1 side located on the P1 side of the inner conductive rod. The inner conductive rod can be a solid rod, in which case it is a rod-shaped conductive rod; or it can be a hollow rod, in which case it is a cylindrical conductive rod. The current-inlet conductive component can be a current-inlet cable or a current-inlet busbar, etc.

[0054] like Figures 1-3As shown, when the inner conductive component 401 is in the series position, the first connector 15 is used to electrically connect the inner conductive terminal 4011 on the P1 side to the terminal 201 on the P1 side; when the inner conductive component 401 is in the parallel position, the second connector 16 is used to electrically connect the inner conductive terminal 4011 on the P1 side to the outer conductive terminal 14 on the P1 side.

[0055] like Figure 3 As shown, preferably, when the current transformer is in the parallel operating position, on the P1 side of the current transformer, the inner conductive terminal 4011, the second connector 16, and the outer conductive terminal 14 on the P1 side are fixedly connected by the same set of fasteners to achieve electrical connection between the inner conductive terminal 4011, the second connector 16, and the outer conductive terminal 14 on the P1 side. The second connector 16 is used for electrical connection with the incoming current conductor to achieve indirect electrical connection between the outer conductive terminal 14 and the incoming current conductor. At this time, the second connector 16 also constitutes the incoming line connector, resulting in a simple structure. The fasteners can be connecting bolts or connecting pins, etc.

[0056] Preferably, the second connector 16 is located between the inner conductive terminal 4011 on the P1 side and the outer conductive terminal 14 on the P1 side, and the structure is simple.

[0057] In other specific embodiments, the external conductive terminal 14 on the P1 side may also be located between the second connector 16 and the internal conductive terminal 4011 on the P1 side.

[0058] In other specific embodiments, the external conductive terminal 14 on the P1 side can also be directly electrically connected to the incoming current conductive element. In this case, the second connector 16 is only used to electrically connect the external conductive terminal 14 on the P1 side and the internal conductive terminal 4011 on the P1 side. Alternatively, both sides of the external conductive terminal 14 on the P1 side are electrically connected to the second connector 16 and the incoming line connector, respectively, and the incoming line connector is electrically connected to the incoming current conductive element. In this case, the second connector 16 is only used to electrically connect the external conductive terminal 14 on the P1 side and the internal conductive terminal 4011 on the P1 side.

[0059] On the P2 side of the current transformer, the housing 2 also includes a P2 side terminal 202, which is located below the outer conductive cylinder 402. The P2 side of the inner conductive component 401 is electrically connected to a P2 side inner conductive terminal 17, and the wiring portion of the P2 side inner conductive terminal 17 is located below the inner conductive component 401. The P2 side inner conductive terminal 17 is electrically connected to the outgoing wire connector 18, and the outgoing wire connector 18 is electrically connected to the P2 side terminal 202 via a third connector 19, resulting in a simple structure.

[0060] Reference Figure 3 As shown, when current transformers in electrical equipment are connected in parallel, the current flows in two directions:

[0061] (1) Inlet conductive component → Second connector 16 (or inlet connector) → P1 side external conductive terminal 14 → External conductive cylinder 402 → Housing 2 → P2 side wiring terminal 202 → Third connector 19 → Outlet connector 18 → Outlet conductive component (outlet cable or outlet conductive bus, etc.).

[0062] (2) Inlet conductive component → Second connector 16 (or inlet connector) → Inner conductive component 401 → P2 side inner conductive terminal 17 → Outlet connector 18 → Outlet conductive component.

[0063] like Figure 2 As shown, when the current transformers in the electrical equipment are in series, the current flow direction is as follows: incoming conductive component → incoming line connector (which can be composed of the second connector 16) → P1 side external conductive terminal 14 → external conductive cylinder 402 → housing 2 → P1 side wiring terminal 201 → first connector 15 → inner conductive component 401 → P2 side inner conductive terminal 17 → outgoing line connector 18 → outgoing current guide component.

[0064] In summary, the main differences between this embodiment and the prior art are: (1) In the prior art, the P1 side terminal 201 is located below the conductive component 4, while in this embodiment, the P1 side terminal 201 is located above the conductive component 4; (2) In the prior art, the inner conductive component 401 cannot rotate, while in this embodiment, the inner conductive component 401 is rotatably coupled with the insulating structure, or the inner conductive component 401 is fixedly connected with the insulating structure, and the insulating structure is rotatably coupled with the outer conductive cylinder 402, that is, the inner conductive component 401 can rotate; (3) In the prior art, the wiring part of the P1 side outer conductive terminal 14 is located above the outer conductive cylinder 402, while in this embodiment, the wiring part of the P1 side outer conductive terminal 14 is located below the outer conductive cylinder 402.

[0065] Based on the above differences, when actually using the current transformer in this embodiment, on-site personnel only need to observe the position of the inner conductive terminal 4011 on the P1 side to easily determine the series or parallel connection state of the current transformer. When the inner conductive terminal 4011 on the P1 side is at its highest position, the current transformer is in series. At this time, since the wiring part of the outer conductive terminal 14 on the P1 side is located below the outer conductive cylinder 402, the current-inlet conductive element will not interfere with the inner conductive terminal 4011 on the P1 side and the first connecting member 15. When the inner conductive terminal 4011 on the P1 side is at its lowest position, the current transformer is in parallel. At this time, since the inner conductive terminal 4011 on the P1 side is already at its lowest position, the force indirectly applied to the inner conductive terminal 4011 on the P1 side by the current-inlet conductive element will not cause the inner conductive terminal 4011 on the P1 side to rotate. When it is necessary to change the series or parallel connection state of the current transformer, the personnel need to rotate the inner conductive element 401.

[0066] like Figure 2 As shown, in one specific embodiment, the first connector 15 includes a first horizontal portion and first vertical portions located on both sides of the first horizontal portion. Each first vertical portion is used for electrical connection with the inner conductive terminal 4011 on the P1 side and the wiring terminal 201 on the P1 side, respectively. In this case, the first connector 15 has an inverted "U" shaped structure, which is simple in structure.

[0067] Meanwhile, the shape of the inner conductive element 401 is the same as that of the inner conductive element 401 in the prior art, so there is no need to remanufacture the inner conductive element 401, which can save costs.

[0068] In other specific embodiments, the length of the inner conductive terminal 4011 on the P1 side can be increased, and when the current transformer is in series, the inner conductive terminal 4011 on the P1 side is aligned with the terminal 201 on the P1 side. At this time, the first connector 15 can be a conductive block.

[0069] like Figure 3 As shown, in one specific embodiment, the second connector 16 includes a second horizontal portion and a second vertical portion located on one side of the second horizontal portion. The second vertical portion is used for fixed connection with the inner conductive terminal 4011 and the outer conductive terminal 14 on the P1 side, and the second horizontal portion is used for electrical connection with the current-carrying conductive element. In this case, the second connector 16 has a "┘" shaped structure, which is simple in structure.

[0070] In other specific embodiments, the second connector 16 can also be a connecting plate. In this case, an additional inlet connector that is electrically connected to the external conductive terminal 14 on the P1 side is required.

[0071] To enable better rotation of the inner conductive component 401, in one specific embodiment, the insulating structure is an insulating sleeve 403, which is made of a self-lubricating material such as polytetrafluoroethylene, thereby reducing the resistance encountered by the inner conductive component 401 during rotation. The insulating sleeve 403 is interference-fitted onto the outer conductive cylinder 402 or the inner conductive component 401.

[0072] In other specific embodiments, the insulating sleeve 403 may also be made of other smooth, non-self-lubricating materials; or, the insulating structure may be a plurality of insulating blocks evenly distributed circumferentially, the insulating blocks being bonded to the outer conductive cylinder 402 or the inner conductive component 401.

[0073] In one specific embodiment, the housing 2 is filled with an insulating gas, which consists of 20.5% nitrogen and 79.5% carbon dioxide. This insulating gas is an environmentally friendly gas that can reduce environmental pollution. It should be noted that the insulating gas is synthetic air, a commonly used environmentally friendly gas in the art, and this invention does not involve any improvement to synthetic air.

[0074] However, in other specific embodiments, the insulating gas can also be SF6 gas. SF6 gas has good insulation properties, which is beneficial for the miniaturization of current transformers.

[0075] In one specific embodiment, when the insulating gas is an environmentally friendly gas, the iron core 3 is electrically connected to the secondary lead tube 8, the secondary lead tube 8 passes vertically through the insulating sleeve 7 and the top plate 5, the shield 6 is fixedly connected to the lower plate surface of the top plate 5, and the lower end of the shield 6 is provided with an outward and upward curled part to avoid the phenomenon of tip discharge, thereby reducing the insulation gap and facilitating the miniaturization of the current transformer.

[0076] However, in other specific embodiments, when the insulating gas is SF6 gas, the current transformer may not include the shield 6, or the shield 6 may be a cylindrical shield; when the insulating gas is an environmentally friendly gas, the inner diameter of the insulating bushing 7 may be increased, thereby eliminating the shield 6, or the inner diameter of the shield 6 may be increased, and the shield 6 with the increased inner diameter may be a cylindrical shield.

[0077] Specific embodiment 2 of the electrical equipment provided by this utility model:

[0078] Reference Figures 1-5 As shown, the main difference between this embodiment and specific embodiment 1 is that in specific embodiment 1, the P1 side terminal 201 is located above the conductive component 4, the wiring portion of the P1 side external conductive terminal 14 is located below the external conductive cylinder 402, and when the internal conductive component 401 is in the series position, the P1 side internal conductive terminal 4011 of the internal conductive component 401 is located at the highest point, and when the internal conductive component 401 is in the parallel position, the P1 side internal conductive terminal 4011 is located at the lowest point; while in this embodiment, the P1 side terminal 201 is located below the conductive component 4, the wiring portion of the P1 side external conductive terminal 14 is located above the external conductive cylinder 402, and when the internal conductive component 401 is in the series position, the P1 side internal conductive terminal 4011 of the internal conductive component 401 is located at the lowest point, and when the internal conductive component 401 is in the parallel position, the P1 side internal conductive terminal 4011 is located at the highest point.

[0079] It should be noted that, in this embodiment, reference is made to... Figures 2-5 As shown, the P2 side terminal 202 can be located below or above the outer conductive cylinder 402.

[0080] Preferably, the P2 side terminal 202 is located below the outer conductive cylinder 402. In this case, the center of gravity of the outgoing conductive component is lower, and the stability of the electrical equipment is better.

[0081] In summary, the main difference between this embodiment and the prior art is that in the prior art, the inner conductive component 401 cannot rotate, while in this embodiment, the inner conductive component 401 is rotatably coupled with the insulating structure, that is, the inner conductive component 401 can rotate.

[0082] Based on the above differences, when actually using the current transformer in this embodiment, on-site personnel only need to observe the position of the inner conductive terminal 4011 on the P1 side to easily determine the series or parallel connection state of the current transformer. When the inner conductive terminal 4011 on the P1 side is at its highest position, the current transformer is in a parallel connection state; when the inner conductive terminal 4011 on the P1 side is at its lowest position, the current transformer is in a series connection state. At this time, since the wiring part of the outer conductive terminal 14 on the P1 side is located above the outer conductive cylinder 402, the current-infeeding conductive component will not interfere with the inner conductive terminal 4011 on the P1 side and the first connecting member 15. When it is necessary to change the series or parallel connection state of the current transformer, the personnel need to rotate the inner conductive component 401.

[0083] Specific embodiments of the current transformer provided by this utility model:

[0084] In this utility model, the difference between electrical equipment and current transformer is that electrical equipment includes current transformer, first connector 15, second connector 16, third connector 19 and outgoing connector 18, while current transformer does not include the above connectors.

[0085] The specific structure of the current transformer in this embodiment is the same as that of any one of the current transformers in specific embodiments 1 and 2 of the electrical equipment of this utility model, and will not be described again here.

[0086] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments without creative effort, or make equivalent substitutions for some of the technical features, or organically combine different specific implementation methods to create appendices. Figures 1-5 The specific embodiments described herein are provided, but those skilled in the art can certainly devise other specific embodiments not shown in the accompanying drawings. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A current transformer, comprising a housing and a conductive assembly horizontally passing through the housing, the conductive assembly comprising an inner conductive element, an outer conductive cylinder, and an insulating structure located between the inner conductive element and the outer conductive cylinder, wherein the P1 side of the outer conductive cylinder is electrically connected to an outer conductive terminal on the P1 side for direct or indirect electrical connection to the current-injecting conductive element, and the housing includes a P1 side terminal block, characterized in that, The inner conductive component is rotatably coupled to the insulating structure, or the inner conductive component is fixedly connected to the insulating structure, and the insulating structure is rotatably coupled to the outer conductive cylinder; the rotation stroke of the inner conductive component has a series station for connecting in series with the outer conductive cylinder during use and a parallel station for connecting in parallel with the outer conductive cylinder during use. The P1 side wiring terminal is located above the conductive component, and the wiring part of the P1 side external conductive terminal is located below the external conductive cylinder. When the internal conductive component is in the series working position, the P1 side internal conductive terminal of the internal conductive component is located at the highest point. When the internal conductive component is in the parallel working position, the P1 side internal conductive terminal is located at the lowest point. Alternatively, the P1 side terminal is located below the conductive component, and the wiring portion of the P1 side external conductive terminal is located above the external conductive cylinder. When the internal conductive component is in a series connection position, the P1 side internal conductive terminal of the internal conductive component is located at the lowest point, and when the internal conductive component is in a parallel connection position, the P1 side internal conductive terminal is located at the highest point.

2. The current transformer as described in claim 1, characterized in that, The insulating structure is an insulating sleeve, and the insulating sleeve is made of a self-lubricating material.

3. The current transformer as described in claim 1 or 2, characterized in that, The housing also includes a P2 side wiring terminal, which is located below the outer conductive cylinder. The P2 side of the inner conductive component is electrically connected to the P2 side inner conductive terminal, and the wiring portion of the P2 side inner conductive terminal is located below the inner conductive component.

4. The current transformer as described in claim 1 or 2, characterized in that, The housing is filled with an insulating gas, which consists of 20.5% nitrogen and 79.5% carbon dioxide.

5. The current transformer as described in claim 4, characterized in that, The current transformer also includes a top plate for supporting the housing and an insulating sleeve for supporting the top plate. An iron core is provided inside the housing, and a secondary lead tube is connected to the iron core. The secondary lead tube passes vertically through the insulating sleeve and the top plate. A shielding cover is fixedly connected to the lower surface of the top plate, and the lower end of the shielding cover has an outward and upward curled part.

6. An electrical device comprising a current transformer, a first connector, and a second connector, characterized in that, The current transformer is the current transformer according to any one of claims 1 to 5; when the inner conductive component is in the series position, the first connector is used to electrically connect the inner conductive terminal on the P1 side to the terminal on the P1 side; when the inner conductive component is in the parallel position, the second connector is used to electrically connect the inner conductive terminal on the P1 side to the outer conductive terminal on the P1 side.

7. The electrical equipment as described in claim 6, characterized in that, When the inner conductive component is in the parallel working position, the inner conductive terminal on the P1 side, the second connector, and the outer conductive terminal on the P1 side are fixedly connected by the same set of fasteners to realize the electrical connection between the inner conductive terminal on the P1 side, the second connector, and the outer conductive terminal on the P1 side. The second connector is used to electrically connect with the incoming conductive component to realize the indirect electrical connection between the outer conductive terminal on the P1 side and the incoming conductive component.

8. The electrical equipment as claimed in claim 7, characterized in that, When the inner conductive component is in the parallel working position, the second connector is located between the inner conductive terminal on the P1 side and the outer conductive terminal on the P1 side.

9. The electrical equipment as described in any one of claims 6 to 8, characterized in that, The first connector includes a first horizontal portion and first vertical portions located on both sides of the first horizontal portion. Each first vertical portion is used to electrically connect to the inner conductive terminal on the P1 side and the wiring terminal on the P1 side, respectively.

10. The electrical equipment as claimed in claim 7 or 8, characterized in that, The second connector includes a second horizontal portion and a second vertical portion located on one side of the second horizontal portion. The second vertical portion is used for fixed connection with the inner conductive terminal and the outer conductive terminal on the P1 side, and the second horizontal portion is used for electrical connection with the incoming current conductive element.

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