Outdoor combined current and voltage transformer

Abstract

The utility model provides an outdoor combined type current and voltage transformer which comprises an insulation pouring body, a first current transformer, a second current transformer, a first voltage transformer and a second voltage transformer, and the first current transformer, the second current transformer, the first voltage transformer and the second voltage transformer are sequentially arranged and sealed in the insulation pouring body. The first current transformer is connected with the first wire outlet plate, the second current transformer is connected with the second wire outlet plate, the first voltage transformer is connected with the first wire outlet plate through the first conductive spring, the second voltage transformer is connected with the second wire outlet plate through the second conductive spring, and the first voltage transformer and the second voltage transformer are connected with the first end and the second end of the conductive rod respectively. And one end of the first wire outlet plate, one end of the second wire outlet plate and the third end of the conducting rod are positioned outside the insulating casting body, so that the problem that a hard special-shaped conducting rod is adopted to connect the voltage transformer and the current transformer in the prior art is solved; the production of the combined type mutual inductor consumes a large amount of labor cost and material cost; and the production efficiency of the combined type mutual inductor is low.

Description

Technical Field

[0001] The utility model relates to the technical field of outdoor mutual inductors, in particular to an outdoor combined current and voltage mutual inductor. Background Art

[0002] Combined instrument transformer is a device for measuring current, voltage or electric energy in power system. It is actually a combination of voltage transformer and current transformer. Combined instrument transformer can be a combination of voltage transformer and current transformer, which is used to measure single-phase power. It can also be a combination of two voltage transformers and two current transformers, which is used to measure three-phase power according to the two-wattmeter method in three-phase three-wire system.

[0003] At present, when producing a combined transformer composed of two voltage transformers and two current transformers, a hard conductive rod is required to connect the two voltage transformers and the two current transformers respectively, and then multiple people work together to move the whole into a mold, then pour insulating material into the mold, and finally demold it. However, there are the following problems:

[0004] First, after the two voltage transformers and the two current transformers are connected, it is inconvenient to carry them as a whole, and the coils of the transformers are easily displaced during the transportation process, so they need to be remade;

[0005] Second, the conductive rod is a special-shaped hard conductive rod, which needs to wait for external processing;

[0006] Third, when the voltage transformer and current transformer are wound with coils, the conductive rods must be wrapped inside the coils of the voltage transformer and current transformer. This requires ensuring that the conductive rod wrapping position is accurate, the conductive rod size is accurate, and the coil winding size is accurate. However, human errors may occur in the processing, wrapping of the conductive rods, and winding of the coils.

[0007] The above three problems result in that the production of the combined mutual inductor not only consumes a large amount of labor cost and material cost, but also reduces the production efficiency of the combined mutual inductor. Utility Model Content

[0008] The purpose of the embodiments of the present application is to provide an outdoor combined current and voltage transformer, which is used to solve the technical problem in the prior art that due to the use of hard special-shaped conductive rods to connect the voltage transformer and the current transformer, the production of the combined transformer not only consumes a lot of labor costs and material costs, but also reduces the production efficiency of the combined transformer.

[0009] To achieve the above objectives, the present application embodiment adopts the following technical solutions:

[0010] An outdoor combined current and voltage transformer comprises an insulating cast body, a first current transformer, a second current transformer, a first voltage transformer and a second voltage transformer;

[0011] The first current transformer, the first voltage transformer, the second voltage transformer and the second current transformer are arranged in sequence and sealed in the insulating casting body;

[0012] The first current transformer is connected to a first outlet board, and one end of the first outlet board is placed outside the insulating casting body;

[0013] The second current transformer is connected to a second outlet board, and one end of the second outlet board is placed outside the insulating casting body;

[0014] The first voltage transformer is connected to the first outlet board through a first conductive spring, the second voltage transformer is connected to the second outlet board through a second conductive spring, a conductive rod is arranged between the first voltage transformer and the second voltage transformer, a first end of the conductive rod is connected to the first voltage transformer, a second end is connected to the second voltage transformer, and a third end is placed outside the insulating casting body.

[0015] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the first current transformer and the second current transformer have the same structure, including a current core, a current primary winding and a current secondary winding;

[0016] The current core is a ring structure, the current secondary winding is wound on the current core, the current primary winding passes through the current core, the current primary winding of the first current transformer is connected to the first outlet board, and the current primary winding of the second current transformer is connected to the second outlet board.

[0017] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the first outlet plate includes a first outlet plate AP1 and a first outlet plate AP2 connected in an integral manner, and the second outlet plate includes a second outlet plate CP1 and a second outlet plate CP2 connected in an integral manner;

[0018] The head end and the tail end of the primary winding of the first current transformer are respectively wound around the tail end of the first outlet plate AP1 and the tail end of the first outlet plate AP2, the first outlet plate AP1 is connected to the first conductive spring, and the head end of the first outlet plate AP1 and the head end of the first outlet plate AP2 are placed outside the insulating casting body;

[0019] The beginning and the end of the primary winding of the second current transformer are respectively wound around the end of the second outlet plate CP1 and the end of the second outlet plate CP2, the second outlet plate CP1 is connected to the second conductive spring, and the beginning of the second outlet plate CP1 and the beginning of the second outlet plate CP2 are placed outside the insulating cast body.

[0020] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the first conductive spring is connected to the first outlet plate AP1 through a first thread hole and a screw opened on the first outlet plate AP1, and the second conductive spring is connected to the second outlet plate CP1 through a second thread hole and another screw opened on the second outlet plate CP1, and the screw is adapted to both the first thread hole and the second thread hole.

[0021] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the screw includes a screw head, an annular groove and a threaded section. The screw head, annular groove and threaded section are connected in sequence and form an integrally formed structure. The threaded section is adapted to both the first thread hole and the second thread hole.

[0022] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the wire diameter of the first conductive spring and the wire diameter of the second conductive spring are both defined as D, and the groove width of the annular groove is d, then D=d is satisfied.

[0023] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the first voltage transformer and the second voltage transformer have the same structure, including a voltage core, a voltage primary winding, and a voltage secondary winding;

[0024] The voltage core is a ring structure, the voltage secondary winding is wound on the voltage core, the voltage primary winding passes through the voltage core, the first end of the voltage primary winding of the first voltage transformer and the first end of the voltage primary winding of the second voltage transformer are both connected with conductive sheets, the first outlet board AP1 is connected to the first voltage transformer through the first conductive spring and the conductive sheet located on the first voltage transformer, the second outlet board CP1 is connected to the second voltage transformer through the second conductive spring and the conductive sheet located on the second voltage transformer, the second end of the voltage primary winding of the first voltage transformer and the second end of the voltage primary winding of the second voltage transformer are both connected to the conductive rod.

[0025] In an outdoor combined current and voltage transformer described in an embodiment of the present application, a secondary junction box is provided at the bottom of the insulating cast body;

[0026] The current secondary winding of the first current transformer, the current secondary winding of the second current transformer, the voltage secondary winding of the first voltage transformer, and the voltage secondary winding of the second voltage transformer are all connected to the secondary junction box.

[0027] In an outdoor combined current and voltage transformer described in an embodiment of the present application, a support assembly is provided on each of the two conductive sheets, and the support assembly includes an embedded nut and a support screw;

[0028] The embedded nut is fixedly installed on the end face of the conductive sheet away from the voltage core, the end of the support screw away from the nut is threadedly connected to the embedded nut, and the nut of the support screw is located at the end of the embedded nut away from the conductive sheet.

[0029] In an outdoor combined current and voltage transformer described in an embodiment of the present application, the support screws and the insulating casting body are both made of epoxy resin.

[0030] Compared with the prior art, the embodiments of the present application have at least the following beneficial effects:

[0031] It can be seen from the above technical scheme that the embodiment of the present application sets a first outlet board connected to the first current transformer, a second outlet board connected to the second current transformer, uses a first conductive spring to connect the first outlet board and the first voltage transformer, and uses a second conductive spring to connect the second outlet board and the second voltage transformer. Through the conductive spring, a "soft connection" of the current transformer and the voltage transformer is achieved, so that in the process of making a combined transformer, it is only necessary to place the voltage transformer and the current transformer separately into the mold, and indirectly connect the voltage transformer and the current transformer using an adjustable and easily accessible conductive spring, which solves the technical problem in the prior art that the voltage transformer and the current transformer are connected by using a hard special-shaped conductive rod, resulting in the production of the combined transformer not only consuming a lot of labor costs and material costs, but also reducing the production efficiency of the combined transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for the description of the embodiments. The drawings are not intended to be drawn to scale, and for the sake of clarity, not every component will be marked in each figure. The drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Among them:

[0033] Figure 1 This is a front view of an outdoor combined current and voltage transformer described in an embodiment of the present application.

[0034] Figure 2 This is a top view of an outdoor combined current and voltage transformer (excluding the insulating cast body) described in an embodiment of the present application.

[0035] Figure 3 Schematic diagram of the structure of the screw in the embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1-insulating cast body, 2-first current transformer, 3-second current transformer, 4-first voltage transformer, 5-second voltage transformer, 6-first outlet board, 7-second outlet board, 8-first conductive spring, 9-second conductive spring, 10-conductive rod, 11-current primary winding, 12-current secondary winding, 13-screw, 14-screw head, 15-annular groove, 16-threaded section, 17-voltage primary winding, 18-voltage secondary winding, 19-conductive sheet, 20-embedded nut, 21-support screw. DETAILED DESCRIPTION

[0038] The embodiment of the present application provides an outdoor combined current and voltage transformer to solve the technical problem in the prior art that the voltage transformer and the current transformer are connected by using hard special-shaped conductive rods, resulting in that the production of the combined transformer not only consumes a large amount of labor costs and material costs, but also reduces the production efficiency of the combined transformer.

[0039] In view of this, the concept of the embodiment of the present application is to set a first outlet board connected to the first current transformer, a second outlet board connected to the second current transformer, use a first conductive spring to connect the first outlet board and the first voltage transformer, and use a second conductive spring to connect the second outlet board and the second voltage transformer. Through the conductive spring, a "soft connection" of the current transformer and the voltage transformer is achieved, so that in the process of making a combined transformer, it is only necessary to place the voltage transformer and the current transformer separately into the mold, and use an adjustable and easily accessible conductive spring to indirectly connect the voltage transformer and the current transformer. This solves the technical problem in the prior art that the voltage transformer and the current transformer are connected by using a hard special-shaped conductive rod, which results in the production of the combined transformer not only consuming a lot of labor costs and material costs, but also reducing the production efficiency of the combined transformer.

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0045] The present application embodiment provides an outdoor combined current and voltage transformer. Figures 1 to 3 As shown, an outdoor combined current and voltage transformer includes an insulating cast body 1, a first current transformer 2, a second current transformer 3, a first voltage transformer 4, a second voltage transformer 5 and a secondary junction box.

[0046] The first current transformer 2 , the first voltage transformer 4 , the second voltage transformer 5 and the second current transformer 3 are arranged in sequence and sealed in the insulating casting body 1 .

[0047] The first current transformer 2 is connected to the first outlet board 6 , one end of which is placed outside the insulating casting body 1 ; the second current transformer 3 is connected to the second outlet board 7 , one end of which is placed outside the insulating casting body 1 .

[0048] Specifically, the first current transformer 2 and the second current transformer 3 have the same structure, and both include a current core, a current primary winding 11 and a current secondary winding 12. The current core is a ring structure, and the current secondary winding 12 is wound on the current core, that is, the current secondary winding 12 of the first current transformer 2 is wound on the current core of the first current transformer 2, and the current secondary winding 12 of the second current transformer 3 is wound on the current core of the second current transformer 2. The current primary winding 11 passes through the current core, that is, the current primary winding 11 of the first current transformer 2 passes through the current core of the first current transformer 2, and the current primary winding 11 of the second current transformer 3 passes through the current core of the second current transformer 3. The current primary winding 11 of the first current transformer 2 is connected to the first outlet board 6, and the The primary current winding 11 of the second current transformer 3 is connected to the second terminal board 7. More specifically, the first terminal board 6 includes a first terminal board AP1 and a first terminal board AP2 connected in an integral manner, and the second terminal board 7 includes a second terminal board CP1 and a second terminal board CP2 connected in an integral manner. The beginning and the end of the primary current winding 11 of the first current transformer 2 are respectively wound on the end of the first terminal board AP1 and the end of the first terminal board AP2, and the beginning and the end of the first terminal board AP1 and the beginning and the end of the first terminal board AP2 are both placed outside the insulating cast body 1. The beginning and the end of the primary current winding 11 of the second current transformer 3 are respectively wound on the end of the second terminal board CP1 and the end of the second terminal board CP2, and the beginning and the end of the second terminal board CP1 and the beginning and the end of the second terminal board CP2 are placed outside the insulating cast body 1.

[0049] Among them, the head end of the first outlet board AP1 and the head end of the first outlet board AP2 located outside the insulating cast body 1 serve as the primary connection terminal of phase A, and the head end of the second outlet board CP1 and the head end of the second outlet board CP2 located outside the insulating cast body 1 serve as the primary connection terminal of phase C.

[0050] The first voltage transformer 4 is connected to the first outlet board 6 through a first conductive spring 8, and the second voltage transformer 5 is connected to the second outlet board 7 through a second conductive spring 9. A conductive rod 10 is arranged between the first voltage transformer 4 and the second voltage transformer 5. The first end of the conductive rod 10 is connected to the first voltage transformer 4, the second end is connected to the second voltage transformer 5, and the third end is placed outside the insulating cast body 1.

[0051] Specifically, the first voltage transformer 4 and the second voltage transformer 5 have the same structure, both including a voltage core, a voltage primary winding 17 and a voltage secondary winding 18, the voltage core is a ring structure, the voltage secondary winding 18 is wound on the voltage core, that is, the voltage secondary winding 18 of the first voltage transformer 4 is wound on the voltage core of the first voltage transformer 4, the voltage secondary winding 18 of the second voltage transformer 5 is wound on the voltage core of the second voltage transformer 5, and the voltage primary winding 17 passes through The voltage core, that is, the voltage primary winding 17 of the first voltage transformer 4 passes through the voltage core of the first voltage transformer 4, the voltage primary winding 17 of the second voltage transformer 5 passes through the voltage core of the second voltage transformer 5, the first end of the voltage primary winding 17 of the first voltage transformer 4 and the first end of the voltage primary winding 17 of the second voltage transformer 5 are both connected with a conductive sheet 19, and the first outlet plate AP1 is connected to the conductive sheet 19 on the first voltage transformer 4 through the first conductive spring 8 and the conductive sheet 19 on the first voltage transformer 4. The first voltage transformer 4 is connected, and the second outlet plate CP1 is connected to the second voltage transformer 5 through the second conductive spring 9 and the conductive sheet 19 located on the second voltage transformer 5. In this embodiment, the first conductive spring 8 is connected to the first outlet plate AP1 through a first thread hole and a screw 13 opened on the first outlet plate AP1, and the second conductive spring 9 is connected to the second outlet plate CP1 through a second thread hole and another screw 13 opened on the second outlet plate CP1. The screw 13 is adapted to the first thread hole and the second thread hole and can be threadedly matched. More specifically, the screw 13 includes a screw head 14, an annular groove 15 and a threaded segment 16. The screw head 14, the annular groove 15 and the threaded segment 16 are connected in sequence, and the three are an integrally formed structure. The threaded segment 16 is adapted to the first thread hole and the second thread hole. The second end of the voltage primary winding 17 of the first voltage transformer 4 and the second end of the voltage primary winding 17 of the second voltage transformer 5 are both connected to the conductive rod 10.

[0052] Wherein, the wire diameter of the first conductive spring 8 and the wire diameter of the second conductive spring 9 are both defined as D, and the groove width of the annular groove 15 is d, then D=d is satisfied. When in use, the end of the first conductive spring 8 connected to the first outlet board AP1 is wound into the corresponding annular groove 15 of the screw 13, and then the threaded segment 16 is screwed into the first thread hole. At the same time, the screw head 14 can press the first conductive spring 8 tightly to ensure the reliable connection between the first conductive spring 8 and the first outlet board AP1. The end of the second conductive spring 9 connected to the second outlet board CP1 is wound into the corresponding annular groove 15 of the screw 13, and then the threaded segment 16 of the screw 13 is screwed into the second thread hole. At this time, the screw head 14 of the screw 13 can press the second conductive spring 9 tightly to ensure the reliable connection between the second conductive spring 9 and the second outlet board CP1. The voltage primary winding 17 of the first voltage transformer 4 and the second voltage transformer 5 are both composed of two sections of coils, and the first end and the second end of the voltage primary winding 17 are the ends of the two sections of coils respectively.

[0053] The secondary junction box (not shown in the figure) is arranged at the bottom of the insulating cast body, and the current secondary winding 12 of the first current transformer 2, the current secondary winding 12 of the second current transformer 3, the voltage secondary winding 18 of the first voltage transformer 4 and the voltage secondary winding 18 of the second voltage transformer 5 are all connected to the secondary junction box.

[0054] The voltage secondary winding 18 of the first voltage transformer 4 and the voltage secondary winding 18 of the second voltage transformer 5 are connected to each other, and the connection point thereof is connected to the secondary junction box.

[0055] In some preferred embodiments, a support assembly is provided on both conductive sheets 19, and the support assembly includes an embedded nut 20 and a support screw 21. The embedded nut 20 is fixedly installed on the end face of the conductive sheet 19 away from the voltage core, and the end of the support screw 21 away from the nut is threadedly connected to the embedded nut 20, and the nut of the support screw 21 is located at the end of the embedded nut 20 away from the conductive sheet 19.

[0056] Among them, the embedded nut 20 is arranged on the upper end face of the conductive sheet 19, and the end of the voltage primary winding 17 of the first voltage transformer 4 and the end of the voltage primary winding 17 of the second voltage transformer 5 are both connected to the lower end face of the conductive sheet 19. When manufacturing an outdoor combined current and voltage transformer described in an embodiment of the present application, the nut of the support screw 21 is fixed to the corresponding position on the mold, which plays a limiting role for the first voltage transformer 4 and the second voltage transformer 5, ensuring the insulation distance between the first voltage transformer 4 and the second voltage transformer 5 and the mold. When pouring epoxy resin to form the insulating casting body 1, the distance from the outer side of the insulating casting body 1 to the first voltage transformer 4 and the second voltage transformer 5 is ensured, that is, by ensuring the thickness of the insulating casting body 1, the insulation effect of the outdoor combined current and voltage transformer described in the embodiment of the present application is ensured.

[0057] In some preferred embodiments, the support screws 21 and the insulating casting body 1 are both made of epoxy resin.

[0058] Among them, since the traditional support screw 21 adopts non-epoxy resin nails, two process holes will be left on the surface of the product after the product is demolded. In order to ensure the insulation of the product, the staff needs to pour epoxy resin into the process holes to seal the process holes. However, after the product is demolded, the epoxy resin poured to seal the process holes will not be able to blend with the molded insulating casting body 1, resulting in poor insulation performance of the transformer or even no insulation, which makes the transformer have serious safety hazards. By setting the material of the support screw 21 to the same as the material of the insulating casting body 1, both are epoxy resin, when pouring epoxy resin into the mold to form the insulating casting body 1, the support screw 21 can be effectively integrated with the insulating casting body 1. When the product is demolded, the product surface is flat and has no process holes, which ensures the insulation performance of the product and eliminates the occurrence of safety hazards.

[0059] In summary, an outdoor combined current and voltage transformer provided in an embodiment of the present application is provided, by setting a first outlet board connected to the first current transformer, a second outlet board connected to the second current transformer, using a first conductive spring to connect the first outlet board and the first voltage transformer, and using a second conductive spring to connect the second outlet board and the second voltage transformer. Through the conductive spring, a "soft connection" of the current transformer and the voltage transformer is realized, so that in the process of making the combined transformer, it is only necessary to place the voltage transformer and the current transformer separately into the mold, and indirectly connect the voltage transformer and the current transformer using an adjustable and easily accessible conductive spring, which solves the technical problem that the production of the combined transformer not only consumes a lot of labor costs and material costs, but also reduces the production efficiency of the combined transformer due to the use of hard special-shaped conductive rods to connect the voltage transformer and the current transformer in the prior art; at the same time, by setting the material of the supporting screws and the insulating casting body to be epoxy resin, the surface of the product is flat and has no process holes when the product is demolded, thereby ensuring the insulation performance of the product and eliminating the occurrence of safety hazards.

[0060] The above is a detailed introduction to an outdoor combined current and voltage transformer provided in an embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An outdoor combined current and voltage transformer, characterized in that: It includes an insulating casting body, a first current transformer, a second current transformer, a first voltage transformer and a second voltage transformer; The first current transformer, the first voltage transformer, the second voltage transformer and the second current transformer are arranged in sequence and sealed in the insulating casting body; The first current transformer is connected to a first outlet board, and one end of the first outlet board is placed outside the insulating casting body; The second current transformer is connected to a second outlet board, and one end of the second outlet board is placed outside the insulating casting body; The first voltage transformer is connected to the first outlet board through a first conductive spring, the second voltage transformer is connected to the second outlet board through a second conductive spring, a conductive rod is arranged between the first voltage transformer and the second voltage transformer, a first end of the conductive rod is connected to the first voltage transformer, a second end is connected to the second voltage transformer, and a third end is placed outside the insulating casting body.

2. An outdoor combined current and voltage transformer as claimed in claim 1, characterized in that: The first current transformer and the second current transformer have the same structure, including a current core, a current primary winding and a current secondary winding; The current core is a ring structure, the current secondary winding is wound on the current core, the current primary winding passes through the current core, the current primary winding of the first current transformer is connected to the first outlet board, and the current primary winding of the second current transformer is connected to the second outlet board.

3. An outdoor combined current and voltage transformer as claimed in claim 2, characterized in that: The first outlet plate includes a first outlet plate AP1 and a first outlet plate AP2 connected in an integral manner, and the second outlet plate includes a second outlet plate CP1 and a second outlet plate CP2 connected in an integral manner; The head end and the tail end of the primary winding of the first current transformer are respectively wound around the tail end of the first outlet plate AP1 and the tail end of the first outlet plate AP2, the first outlet plate AP1 is connected to the first conductive spring, and the head end of the first outlet plate AP1 and the head end of the first outlet plate AP2 are placed outside the insulating casting body; The beginning and the end of the primary winding of the second current transformer are respectively wound around the end of the second outlet plate CP1 and the end of the second outlet plate CP2, the second outlet plate CP1 is connected to the second conductive spring, and the beginning of the second outlet plate CP1 and the beginning of the second outlet plate CP2 are placed outside the insulating cast body.

4. An outdoor combined current and voltage transformer as claimed in claim 3, characterized in that: The first conductive spring is connected to the first outlet plate AP1 through a first thread hole and a screw opened on the first outlet plate AP1, and the second conductive spring is connected to the second outlet plate CP1 through a second thread hole and another screw opened on the second outlet plate CP1, and the screw is adapted to both the first thread hole and the second thread hole.

5. An outdoor combined current and voltage transformer as claimed in claim 4, characterized in that: The screw comprises a screw head, an annular groove and a threaded section, which are connected in sequence and form an integral structure, and the threaded section is adapted to both the first thread hole and the second thread hole.

6. An outdoor combined current and voltage transformer as claimed in claim 5, characterized in that: It is defined that the wire diameter of the first conductive spring and the wire diameter of the second conductive spring are both D, and the groove width of the annular groove is d, then D=d is satisfied.

7. An outdoor combined current and voltage transformer as claimed in claim 3, characterized in that: The first voltage transformer and the second voltage transformer have the same structure, including a voltage core, a voltage primary winding and a voltage secondary winding; The voltage core is a ring structure, the voltage secondary winding is wound on the voltage core, the voltage primary winding passes through the voltage core, the first end of the voltage primary winding of the first voltage transformer and the first end of the voltage primary winding of the second voltage transformer are both connected with conductive sheets, the first outlet board AP1 is connected to the first voltage transformer through the first conductive spring and the conductive sheet located on the first voltage transformer, the second outlet board CP1 is connected to the second voltage transformer through the second conductive spring and the conductive sheet located on the second voltage transformer, the second end of the voltage primary winding of the first voltage transformer and the second end of the voltage primary winding of the second voltage transformer are both connected to the conductive rod.

8. An outdoor combined current and voltage transformer as claimed in claim 7, characterized in that: A secondary junction box is provided at the bottom of the insulating cast body; The current secondary winding of the first current transformer, the current secondary winding of the second current transformer, the voltage secondary winding of the first voltage transformer, and the voltage secondary winding of the second voltage transformer are all connected to the secondary junction box.

9. An outdoor combined current and voltage transformer as claimed in claim 7, characterized in that: A support assembly is disposed on each of the two conductive sheets, and the support assembly includes an embedded nut and a support screw; The embedded nut is fixedly installed on the end face of the conductive sheet away from the voltage core, the end of the support screw away from the nut is threadedly connected to the embedded nut, and the nut of the support screw is located at the end of the embedded nut away from the conductive sheet.

10. An outdoor combined current and voltage transformer as claimed in claim 9, characterized in that: The support screws and the insulating casting body are both made of epoxy resin.

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