Integrated current transformer
By integrating the current coil and the zero-sequence coil into the current transformer, the problems of high cost and non-maintainability of traditional transformers are solved, achieving functional integration and maintainability.
Patent Information
- Application Number
- CN202422754353.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-12
AI Technical Summary
Traditional current transformers require the use of different transformers for current detection and zero-sequence detection, which increases costs and makes the equipment unusable if the leads are damaged.
The integrated structure integrates the current coil and the zero-sequence coil into a single current transformer, and the coil and lead wires can be detachably connected through an interface board and lead wire interface.
This invention enables a single current transformer to perform both current detection and zero-sequence detection, reducing operating costs and allowing for lead replacement in case of damage, thus preventing equipment failure.
Smart Images
Figure CN223612209U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model discloses a current transformer structure belongs to current transformer technical field, concretely relates to an integrated current transformer. BACKGROUND
[0002] The main role of the current transformer is to convert the large current of the primary side into small current of the secondary side for measurement and protection. The current transformer works based on the principle of electromagnetic induction, and its core functions include measurement, protection, isolation and optimization of power system operation. The current transformer is mainly composed of a core, a primary winding, a secondary winding, a terminal and an insulating support. The core is usually made of silicon steel sheets, and the primary winding has fewer turns and is connected in series with the current line to be measured. The secondary winding has more turns and is connected in series with the measuring instrument and the protection circuit.
[0003] The traditional current transformer can be used for current detection and zero sequence detection, but when current detection or zero sequence detection is performed, different current transformers need to be used, that is, one current transformer is needed for current detection, and another current transformer is needed for zero sequence detection, which can cause the increase of use cost. In addition, the coil enameled wire of the traditional current transformer is connected with the outside through a lead wire. Since the current transformer is filled with glue for packaging during production, when the lead wire is damaged, it cannot be replaced, thereby causing the current transformer to be scrapped. INVENTION CONTENTS
[0004] The utility model discloses an integrated current transformer, which solves the above-mentioned problems.
[0005] Technical scheme: An integrated current transformer comprises a shell, a current coil, a zero sequence coil, a shielding ring, an interface plate and a lead wire interface.
[0006] The current coil and the zero sequence coil are both composed of enameled wire and a magnetic core. The enameled wire is wound on the magnetic core and has two ends leading out and welded with the interface plate.
[0007] The current coil, the zero sequence coil and the shielding ring are installed in the shell, the interface plate is fixedly installed on the shell, and the lead wire interface is welded on the interface plate.
[0008] In further embodiments, the shell is formed by one-piece injection molding.
[0009] In further embodiments, the shell is formed by one-piece injection molding.
[0010] The installation groove is provided with a plurality of installation grooves, and the current coil is installed in the installation groove. Adjacent installation grooves are provided with gaps.
[0011] The positioning column is located in the middle of the mounting groove, and the shielding ring is located in the mounting cavity and sleeved on the positioning column.
[0012] The zero sequence coil is mounted in the mounting cavity and located between the shielding ring and the inner wall of the shell.
[0013] In a further embodiment, the zero sequence coil and the shielding ring are in a runway shape.
[0014] In a further embodiment, the shell is encapsulated by glue pouring.
[0015] In a further embodiment, the lead interface is connected with an external circuit board through a plug-in lead.
[0016] Compared with the prior art, the utility model has beneficial effects:
[0017] 1. An integrated structure is adopted, the current coil and the zero sequence coil are integrated in a current transformer, so that current detection and zero sequence detection functions can be realized through a current transformer, thereby reducing cost.
[0018] 2. An interface plate and a lead interface are adopted to realize connection of coil enameled wire and lead, so that when the lead is damaged, the lead can be conveniently replaced, and the current transformer is prevented from being scrapped. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is the axonometric view of the utility model.
[0020] Figure 2 is the plan view of the utility model.
[0021] Figure 3 is the sectional view of the utility model.
[0022] Figure 4 is the bottom view of the utility model.
[0023] Reference signs: shell 1, current coil 2, zero sequence coil 3, shielding ring 4, interface plate 5, lead interface 6. DETAILED DESCRIPTION
[0024] The technical scheme of the utility model will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.
[0025] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element must have a specific orientation, a specific orientation and operation, therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0026] In the description of the utility model, it needs to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, the technical features involved in different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.
[0027] An integrated current transformer, comprising: a shell 1, a current coil 2, a zero sequence coil 3, a shielding ring 4, an interface plate 5, a lead interface 6.
[0028] In one embodiment, as shown in Figures 1 to 4 The current coil 2 and the zero sequence coil 3 are composed of an enameled wire and a magnetic core; the enameled wire is wound on the magnetic core and the two ends are led out and welded with the interface plate 5;
[0029] The current coil 2, the zero sequence coil 3 and the shielding ring 4 are installed in the shell 1, the interface plate 5 is fixedly installed on the shell 1, and the lead interface 6 is welded on the interface plate 5.
[0030] In one embodiment, as shown in Figures 1 to 4 The shell 1 is formed by integral injection molding.
[0031] In one embodiment, as shown in Figures 1 to 4 The shell 1 is formed by integral injection molding.
[0032] The installation groove is provided with a plurality of installation grooves, and the current coil 2 is installed in the installation groove, and a gap is provided between adjacent installation grooves;
[0033] The positioning column is located in the middle of the installation groove, the shielding ring 4 is located in the installation cavity and is sleeved on the positioning column;
[0034] The zero sequence coil 3 is installed in the installation cavity and between the shielding ring 4 and the inner wall of the shell 1.
[0035] In one embodiment, as shown in the drawings, the zero sequence coil 3 and the shielding ring 4 are runway-shaped. Figures 1 to 4
[0036] In one embodiment, as shown in the drawings, the shell 1 is encapsulated by pouring glue. Figures 1 to 4
[0037] In one embodiment, as shown in the drawings, the lead interface 6 is connected with an external circuit board through a plug-in lead. Figures 1 to 4
[0038] In the assembly of the utility model, firstly, the lead interface 6 is welded on the interface plate 5, secondly, the interface plate 5 is fixedly installed on the shell 1, the current coil 2, the zero sequence coil 3 and the shielding ring 4 are sequentially put into the shell 1, meanwhile, the ends of the enameled wire of the current coil 2 and the zero sequence coil 3 are led out and welded on the interface plate 5, the shell 1 is encapsulated by pouring glue, finally, the lead interface 6 is connected with an external circuit board through a plug-in lead, the utility model integrates the current coil 2 and the zero sequence coil 3 in a current transformer, so that the current detection or zero sequence detection function can be realized through a current transformer, thereby reducing the use cost, meanwhile, the interface plate 5 and the lead interface 6 are adopted to realize the connection between the coil enameled wire and the lead, so that when the lead is damaged, the lead can be conveniently replaced, and the current transformer is prevented from being scrapped.
[0039] Obviously, the above embodiments are only examples for clearly illustrating, and are not limitation to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the utility model.
Claims
1. An integrated current transformer, characterized by Include: The shell, current coil, zero sequence coil, shield ring, interface board and lead interface; The current coil and the zero sequence coil are both composed of enameled wire and magnetic core; the enameled wire is wound on the magnetic core and the two ends are led out and welded with the interface board; The current coil, the zero sequence coil and the shield ring are installed in the shell, the interface board is fixedly installed on the shell, and the lead interface is welded on the interface board.
2. The integrated current transformer of claim 1, wherein, The shell is formed by one-piece injection molding.
3. The integrated current transformer of claim 2, wherein, The mounting groove, positioning column and mounting cavity are formed in the shell by injection molding; The mounting groove is provided with a plurality of mounting grooves, and the current coil is installed in the mounting groove, and a gap is provided between adjacent mounting grooves; The positioning column is located in the middle of the mounting groove, the shield ring is located in the mounting cavity and is sleeved on the positioning column; The zero sequence coil is installed in the mounting cavity and located between the shield ring and the inner wall of the shell.
4. The integrated current transformer of claim 1, wherein, The zero sequence coil and the shield ring are in the shape of a racetrack.
5. The integrated current transformer of claim 1, wherein, The shell is packaged by pouring glue.
6. The integrated current transformer of claim 1, wherein, The lead interface is connected with the external circuit board through plug-in lead.