A large current transformer for round meters

Abstract

The utility model relates to a mutual -inductor technical field especially a kind of circular table with large current mutual -inductor, including shell, magnetic core and coil, the coil is wound on magnetic core, the magnetic core and coil are set in shell, secondary output wire is provided on the coil, the secondary output wire extends to shell outside, glue sealing is carried out in shell interior, through-hole is set in the middle part of shell, copper bar is threaded in through-hole, primary input copper sheet is welded in the both ends of copper bar. A kind of circular table with large current mutual -inductor obtained by the utility model, copper bar is threaded in shell interior, to ensure the stable passage of large current, while also can reduce the inner diameter of coil, magnetic core, to reduce the size of whole mutual -inductor, reduce cost while miniaturization.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, and in particular to a high current transformer for circular meters. Background Technology

[0002] In existing technology, for current transformers used in circular meters, especially when the current is large, such as 200A, the width of the primary input copper strip needs to be 19mm and the thickness is about 2.5mm. Therefore, the diameter of the through hole in the transformer housing must be greater than or equal to 19mm, meaning the hollow diameter of the internal magnetic core and coil must be greater than 19mm. This ultimately results in the outer diameter of the entire transformer housing exceeding 50mm, making the overall size large. Utility Model Content

[0003] To address the aforementioned technical deficiencies, this invention provides a high-current transformer for circular meters, which enables the passage of large currents and features a small size.

[0004] This utility model discloses a high current transformer for a circular atomic meter, including a housing, a magnetic core and a coil. The coil is wound on the magnetic core, and the magnetic core and coil are disposed inside the housing. A secondary output wire is disposed on the coil and extends to the outside of the housing. The inside of the housing is sealed with glue. A through hole is provided in the middle part of the housing, and a copper rod is inserted into the through hole. Primary input copper sheets are welded to both ends of the copper rod.

[0005] The cross-section of the primary input copper sheet is rectangular, with a width greater than or equal to 19 mm and a thickness greater than or equal to 2.5 mm. The cross-section of the copper rod is square, with a side length of 6.5 mm.

[0006] Four sets of support parts are arranged in an array on the inner wall of the through hole of the shell. Each set of support parts is spaced 90° apart, and each set of support parts abuts against the four side walls of the copper rod.

[0007] The support includes two parallel raised ribs, with the two raised ribs of each support being spaced apart from each other, and the raised ribs covering the entire axial direction of the through hole.

[0008] Connect a voltage measurement line to one of the primary input copper plates.

[0009] The present invention provides a high-current transformer for circular meters, which uses a copper rod inserted inside the housing to ensure the stable passage of high current. At the same time, it can also reduce the inner diameter of the coil and magnetic core, thereby reducing the size of the entire transformer, lowering costs and enabling miniaturization. Attached Figure Description

[0010] Figure 1 This is a front view of the structure of this utility model;

[0011] Figure 2 This is a front view of the present invention (voltage measuring lines are not shown);

[0012] Figure 3 This is a side view of the present invention (voltage measuring lines are not shown);

[0013] Figure 4 for Figure 2 Schematic diagram of the cross section of AA;

[0014] Figure 5 The three-dimensional representation of this utility model Figure 1 (Voltage measurement leads not shown);

[0015] Figure 6 The three-dimensional representation of this utility model Figure 2 (Voltage measurement lines are not shown). Detailed Implementation

[0016] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0017] Example 1:

[0018] like Figure 1-6 As shown, this utility model discloses a high current transformer for a circular atomic meter, including a housing 1, a magnetic core 8 and a coil 9. The coil 9 is wound on the magnetic core 8. The magnetic core 8 and the coil 9 are disposed inside the housing 1. A secondary output wire 4 is disposed on the coil 9. The secondary output wire 4 extends to the outside of the housing 1. The inside of the housing 1 is sealed with glue. A through hole 6 is provided in the middle part of the housing 1. A copper rod 2 is inserted into the through hole 6. Primary input copper sheets 3 are welded to both ends of the copper rod 2.

[0019] The housing 1, magnetic core 8, and coil 9 are all essential components of a conventional current transformer. The housing 1 is a hollow cylindrical structure with a through hole 6 in the middle. A copper rod 2 passes through the through hole 6 of the housing 1, and primary input copper sheets 3 are welded to both ends of the copper rod 2. Since existing circular current transformers using copper sheets with a cross-section of 19mm × 2.5mm for 200A current are designed to maintain the connection method, the original copper sheets are used at both ends of the copper rod 2. To minimize the diameter of the through hole 6 in the housing 1, the copper rod 2 connects two primary input copper sheets 3. While ensuring that the copper rod 2 can handle a large current of 200A, it can accommodate a smaller through hole 6 diameter, thereby reducing the outer diameter of the housing 1, magnetic core 8, and coil 9, and reducing the overall size of the current transformer, resulting in a small-volume, high-current current transformer.

[0020] The primary input copper sheet 3 has a rectangular cross-section with a width of at least 19 mm and a thickness of at least 2.5 mm. The copper rod 2 has a square cross-section with a side length of 6.5 mm. The copper rod 2, with its square cross-section, is a long strip structure that can be welded to the primary input copper sheets 3 at both ends. The dimensions of the primary input copper sheet 3 are set according to actual requirements to ensure it can carry a current of 200A. Simultaneously, the dimensions of the copper rod 2 allow it to carry a current of 200A, and the required through-hole diameter 6 is relatively small, reducing the overall size of the transformer. One sidewall of the square-section copper rod 2 can be welded to the primary input copper sheet 3, resulting in a large contact area, a strong and stable weld, and ensuring stable current flow.

[0021] Four sets of support parts are arranged in an array on the inner wall of the through hole 6 of the housing 1. Each set of support parts is spaced 90° apart, and each set of support parts abuts against the four side walls of the copper rod 2. The 90° spacing of the support parts ensures that each support part can support the four side walls of the copper rod 2. In actual use, there can be a certain interference fit between the support parts and the copper rod 2 to ensure that the connection between the housing 1 and the copper rod 2 is firm and stable.

[0022] The support portion includes two parallel raised ribs 7, with the two raised ribs 7 of each support portion spaced apart from each other, and the raised ribs 7 covering the entire axial direction of the through hole 6. Using two spaced raised ribs 7 as the support portion provides a large contact area between the raised ribs 7 and the copper rod 2, thereby improving the stability of the positioning.

[0023] A voltage measuring line 5 is connected to one of the primary input copper plates 3. A copper fitting can be installed at the end of the voltage measuring line 5, and the copper fitting and the primary input copper plate 3 can be fixedly connected by riveting.

[0024] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the interaction relationship between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simplification, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-current transformer for circular meters, comprising a housing, a magnetic core, and a coil, characterized in that: The coil is wound on a magnetic core, and the magnetic core and coil are disposed inside a housing. A secondary output wire is provided on the coil and extends to the outside of the housing. The inside of the housing is sealed with glue. A through hole is provided in the middle of the housing, and a copper rod is inserted into the through hole. Primary input copper sheets are welded to both ends of the copper rod.

2. A high-current transformer for circular meters according to claim 1, characterized in that: The cross-section of the primary input copper sheet is rectangular, with a width greater than or equal to 19 mm and a thickness greater than or equal to 2.5 mm. The cross-section of the copper rod is square, with a side length of 6.5 mm.

3. A high-current transformer for circular meters according to claim 2, characterized in that: Four sets of support parts are arranged in an array on the inner wall of the through hole of the shell. Each set of support parts is spaced 90° apart, and each set of support parts abuts against the four side walls of the copper rod.

4. A high-current transformer for circular meters according to claim 3, characterized in that: The support includes two parallel raised ribs, with the two raised ribs of each support being spaced apart from each other, and the raised ribs covering the entire axial direction of the through hole.

5. A high-current transformer for circular meters according to claim 1, characterized in that: Connect a voltage measurement line to one of the primary input copper plates.

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