Low partial discharge protection resistor

Abstract

This utility model relates to the field of resistor technology and provides a low partial discharge protection resistor, including equalizing rings, an insulating support, and wire-wound resistors. Five equalizing rings are evenly spaced on the outside of the insulating support, and five wire-wound resistors are positioned between adjacent equalizing rings. The wire-wound resistors of this utility model employ a design where resistance wire is uniformly wound around a ceramic insulating tube and fixed with high-performance insulating varnish, greatly reducing partial discharge and effectively ensuring the stable operation of the power system and equipment safety. The equalizing rings are made of polished aluminum rings with a complete and uniform curvature. Their evenly spaced distribution on the outside of the insulating support effectively improves and evens out the electric field distribution, significantly enhancing electric field uniformity and reducing the risk of faults caused by electric field distortion. The wire-wound resistors between adjacent equalizing rings are arranged in an evenly spaced, staggered manner, allowing the heat generated by each resistor during energization to dissipate rapidly and preventing heat accumulation.

Description

Technical Field

[0001] This utility model relates to the field of resistor technology, and in particular to a low partial discharge protection resistor. Background Technology

[0002] In the testing and operation of power systems, protective resistors, as key components, play a crucial role in ensuring equipment safety and stable system operation. However, traditional protective resistors have many problems that urgently need to be addressed:

[0003] On the one hand, conventional wire-wound resistors are prone to generating high partial discharge during operation due to manufacturing process and structural design defects. This not only affects the accuracy of test data but may also cause potential damage to power equipment, seriously threatening the safety of system operation.

[0004] On the other hand, traditional protective resistors suffer from uneven electric field distribution, and electric field distortion can easily lead to excessively high local electric field strength, causing faults such as insulation breakdown, which greatly limits the performance and service life of the equipment. At the same time, wire-wound resistors generate a lot of heat during the energizing process, and the heat dissipation design of traditional structures is unreasonable, making it difficult for the heat to be dissipated effectively. The accumulation of heat can easily degrade the resistor's performance and even cause equipment failure. Utility Model Content

[0005] The purpose of this invention is to provide a low partial discharge protection resistor, which solves the above-mentioned problems when used in operation.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a low partial discharge protection resistor, including equalizing rings, insulating supports and wire-wound resistors, wherein five equalizing rings are equally spaced on the outside of the insulating supports, and five wire-wound resistors are arranged between two adjacent equalizing rings.

[0007] Preferably, the wire-wound resistor consists of a resistance wire and a ceramic insulating tube, with the resistance wire evenly wound around the ceramic insulating tube.

[0008] Preferably, the five wire-wound resistors are arranged at equal intervals between two adjacent equalizing rings.

[0009] Preferably, the equalizing ring has ten holes, and ten wire-wound resistors are arranged between the three equalizing rings.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. The present invention provides a low partial discharge protection resistor, wherein the wire-wound resistor is designed by uniformly winding the resistance wire on a ceramic insulating tube and fixing it with high-performance insulating varnish, which greatly reduces the partial discharge and effectively ensures the stable operation of the power system and the safety of the equipment.

[0012] 2. The low partial discharge protection resistor provided by this utility model has an equalizing ring made of polished aluminum ring with a complete and uniform arc. By being evenly distributed on the outside of the insulation support, it can effectively improve and uniformize the electric field distribution, significantly improve the electric field uniformity, reduce the risk of faults caused by electric field distortion, and provide a stable electric field environment for the test circuit.

[0013] 3. The low partial discharge protection resistor provided by this utility model adopts an equally spaced staggered arrangement of the wire-wound resistors between adjacent equalizing rings, so that the heat generated by each resistor during the power-on process can be quickly dissipated, avoiding heat accumulation, effectively solving the heat dissipation problem, extending the service life of the resistor, and ensuring its reliability under long-term operation.

[0014] 4. This utility model provides a low partial discharge protection resistor where an insulating support connects the wire-wound resistors in an orderly series, which not only enhances the stability of the entire resistor structure but also simplifies the installation process, reduces operational difficulty, and improves ease of use. Simultaneously, by optimizing the connection method between the wire-wound resistor and the equalizing ring, the use of other structural components is simplified, making the resistor structure more compact and concise, effectively reducing manufacturing costs and maintenance difficulty.

[0015] In summary, this resistor structure, with its innovative combination of equalizing ring and wire-wound resistor, can be flexibly connected in series or parallel to the circuit according to test requirements. It not only optimizes the uniformity of the electric field, but also provides reliable protection for the equipment in the test circuit, greatly improving its applicability and versatility in different test scenarios. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model;

[0017] Figure 2 This is a side view of the structure of this utility model.

[0018] The following are the labels in the attached diagram: 1. Equalizing ring; 2. Insulation support; 3. Wire winding resistor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0021] Combination Figure 1 and Figure 2 As shown, a low partial discharge protection resistor of this utility model includes an equalizing ring 1, an insulating support 2, and a wire-wound resistor 3. Five equalizing rings 1 are equally spaced on the outside of the insulating support 2, and five wire-wound resistors 3 are arranged between two adjacent equalizing rings 1.

[0022] The wire-wound resistor 3 consists of a resistance wire and a ceramic insulating tube. The resistance wire is evenly wound around the ceramic insulating tube and fixed with high-performance insulating varnish. The winding is uniform, resulting in extremely low partial discharge.

[0023] Five wire-wound resistors 3 are equally spaced between two adjacent equalizing rings 1.

[0024] Ten holes are opened on the equalizing ring 1, and ten wire-wound resistors 3 are arranged between the three equalizing rings 1.

[0025] Specifically, the equalizing ring 1 is made of aluminum ring with a polished surface and a complete and uniform arc, which effectively improves and equalizes the electric field;

[0026] The insulating support 2 connects the entire winding resistor 3 in series, further strengthening the entire resistor structure and facilitating installation and use.

[0027] The arrangement of multiple wire-wound resistors 3, spaced apart from each other, effectively dissipates the heat generated during energization. Similarly, this structural arrangement solves both the problem of electric field uniformity and the heat dissipation issue of the wire-wound resistors 3. Furthermore, the connection between the wire-wound resistors 3 and the equalizing ring 1 effectively reduces the need for other structural components. The overall resistor structure is simpler.

[0028] This resistor structure, through the combination of equalizing ring 1 and winding resistor 3, can be connected in series or parallel to the circuit according to the test requirements, thereby improving the uniformity of the electric field and protecting the equipment in the test circuit.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low partial discharge protection resistor comprising a grading ring (1), an insulating support (2) and a winding resistor (3), characterized in that: Five equalizing rings (1) are equally spaced on the outside of the insulating support (2), and five winding resistors (3) are arranged between two adjacent equalizing rings (1).

2. The low partial discharge protection resistor according to claim 1, characterized in that: The winding resistor (3) consists of a resistance wire and a ceramic insulating tube, with the resistance wire evenly wound around the ceramic insulating tube.

3. The low partial discharge protection resistor according to claim 1, characterized in that: The five winding resistors (3) are equally spaced between two adjacent equalizing rings (1).

4. The low partial discharge protection resistor according to claim 1, characterized in that: The equalizing ring (1) has ten holes, and ten wire-wound resistors (3) are arranged between the three equalizing rings (1).

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