A mutual inductor with high insulation performance

Abstract

This utility model discloses a high-insulation-performance instrument transformer, relating to the field of power equipment technology. It includes an instrument transformer body, a limiting protrusion at the top of the body, a protective cover at the top of the body and above the limiting protrusion, a protective plate at the top of the limiting protrusion and on the inner wall of the protective cover, a fixing screw at the top of the protective cover, and a mounting plate at the bottom of the instrument transformer body. The mounting plate has perforated rubber gaskets symmetrically arranged at both ends. This utility model effectively improves the insulation performance and installation and maintenance convenience of the instrument transformer, providing a strong guarantee for the safe and stable operation of the power system.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of power equipment, specifically to a current transformer with high insulation performance. Background Technology

[0002] In power systems, instrument transformers, as key electrical equipment, play a crucial role in transforming high voltage or large current into low voltage or small current for use by measuring instruments, protection devices, and automatic control equipment. With the rapid development of the power industry, the performance requirements for instrument transformers are increasingly stringent, particularly regarding insulation performance.

[0003] According to application number CN202411199084.6, a current transformer includes: a housing; a magnetic core disposed inside the housing, the surface of which is wound with copper wire, which can be used to directly connect the primary winding to the main circuit, and the current passing through it will generate a magnetic field in the iron core; a base fixedly connected to the circumferential surface of the housing; and a bracket fixedly connected to the lower end of the base. The current transformer, through components such as a sliding groove, sliding rod, rubber block, and suction cup in the fixing mechanism, may have deficiencies in its insulation design. For example, if it operates in a harsh environment for a long time, it is easily affected by factors such as humidity and dirt, leading to a decrease in insulation performance, which in turn affects the accuracy and reliability of the current transformer, and may even cause safety accidents. Secondly, the connection method of the above-mentioned current transformer is redundant and complex, using reverse screw installation, which increases the cost of maintenance, repair, and replacement.

[0004] Therefore, developing a current transformer with high insulation performance and convenient installation and maintenance is of great practical significance. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a current transformer with high insulation performance to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high-insulation-performance instrument transformer includes an instrument transformer body, a limiting protrusion on the top of the instrument transformer body, a protective cover on the top of the instrument transformer body and above the limiting protrusion, a protective plate on the top of the limiting protrusion and on the inner wall of the protective cover, a fixing screw passing through the top of the protective cover, and a mounting plate passing through the bottom of the instrument transformer body, with perforated rubber pads symmetrically provided at both ends of the mounting plate.

[0008] Preferably, the top of the limiting protrusion is provided with a groove in the horizontal direction, and the top of the limiting protrusion is provided with a through groove in the vertical direction.

[0009] Preferably, the protective cover has multiple wiring ports on its side wall and a top block on its top inner wall.

[0010] Preferably, the protective plate has multiple side plates at both ends, through holes at both ends, and sheet-like rubber pads on the inner side of the side plates.

[0011] Preferably, the outer walls at both ends of the protective plate are slidably connected to the inner wall of the protective cover, and the middle end of the protective plate is correspondingly provided with the through groove.

[0012] Preferably, the bottom of the fixing screw is threaded to the top of the transformer body.

[0013] Preferably, the mounting plate has a T-shaped cross-section, and the two ends of the mounting plate are symmetrically provided with U-shaped grooves.

[0014] Preferably, the perforated rubber pad is embedded in the inner wall of the U-shaped groove.

[0015] In summary, this technical solution has the following main advantages:

[0016] In this invention, by setting limiting protrusions, protective covers, and protective plates on the top of the current transformer body, and by rationally designing the cooperation relationship between these structures, such as the sliding connection between the protective cover and the protective plate, and the corresponding through grooves between the protective plate and the limiting protrusions, the influence of external environmental factors on the internal circuit of the current transformer is effectively prevented, thus improving the insulation performance of the current transformer. Meanwhile, the side plates and sheet-like rubber gaskets at both ends of the protective plate further enhance the sealing and insulation properties. Furthermore, the mounting plate has U-shaped grooves and perforated rubber gaskets at both ends, allowing the current transformer to be easily installed on various support structures, improving installation stability. Attached Figure Description

[0017] Figure 1 This is an isometric view of the overall structure of this utility model;

[0018] Figure 2 Exploded view of the overall structure of this utility model Figure 1 ;

[0019] Figure 3 Exploded view of the overall structure of this utility model Figure 2 ;

[0020] Figure 4 For the present utility model Figure 2 Enlarged view of point A in the middle.

[0021] Figure descriptions: 1. Current transformer body; 2. Limiting protrusion; 3. Protective cover; 4. Protective plate; 5. Fixing screw; 6. Mounting plate; 7. Perforated rubber pad; 201. Groove; 202. Through groove; 301. Wiring port; 302. Top block; 401. Side plate; 402. Through hole; 403. Sheet-shaped rubber pad; 601. U-shaped groove. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0023] Example

[0024] like Figures 1 to 4 As shown, a high-insulation-performance instrument transformer includes an instrument transformer body 1, a limiting protrusion 2 on the top of the instrument transformer body 1, a protective cover 3 on the top of the instrument transformer body 1 and above the limiting protrusion 2, a protective plate 4 on the top of the limiting protrusion 2 and on the inner wall of the protective cover 3, a fixing screw 5 passing through the top of the protective cover 3, and a mounting plate 6 passing through the bottom of the instrument transformer body 1. The mounting plate 6 has perforated rubber pads 7 symmetrically provided at both ends.

[0025] It should be noted that in this embodiment, the top of the limiting protrusion 2 is horizontally embedded with a groove 201, and the top of the limiting protrusion 2 is vertically provided with a through groove 202; the groove 201 is used to cooperate with the top block 302 provided on the inner wall of the top of the cover 3 for limiting and pressing connection and fixation, effectively preventing the cover 3 from being installed off-center, while allowing the protective plate 4 to be moved and limited.

[0026] The protective cover 3 has multiple wiring ports 301 on its side wall. The top of the transformer body 1 and the side of the wiring ports 301 are also provided with wiring posts. The wiring ports 301 are used for wires to pass through and be fixedly connected to the wiring posts to ensure the normal use of the transformer body 1.

[0027] The protective plate 4 has multiple side plates 401 at both ends. The multiple side plates 401 are located on one side of multiple wiring ports 301, which serve to shield and reduce the through hole area of ​​the wiring ports 301, effectively avoiding the influence of electric arc on the electrical cabinet and electrical components themselves. Secondly, the reduction of the through hole area also plays a certain role in dust prevention.

[0028] The protective plate 4 has through holes 402 at both ends to reserve installation positions for the terminal blocks and connected wires, ensuring the basic functions of the transformer body 1.

[0029] The inner side of the side panel 401 is provided with a sheet-like rubber pad 403 to help prevent the electric arc from affecting the electrical cabinet and the electrical components themselves.

[0030] The outer walls at both ends of the protective plate 4 are slidably connected to the inner wall of the cover 3, and the middle end of the protective plate 4 is correspondingly set with the through groove 202, so that the protective plate 4 can be embedded in the inner wall of the cover 3.

[0031] The bottom of the fixing screw 5 is threaded to the top of the transformer body 1. The fixing screw 5 is used to fix the protective plate 4, including the protective cover 3, to the top of the transformer body 1, so that the protective plate 4, the protective cover 3 and the transformer body 1 constitute an integrated electrical unit.

[0032] The mounting plate 6 has a T-shaped cross-section, which facilitates the quick and easy installation of the transformer by the installer. The mounting plate 6 has symmetrical U-shaped grooves 601 at both ends. The mounting plate 6 is generally made of metal. It is used in conjunction with the perforated rubber pad 7 and screws through the U-shaped groove 601. The perforated rubber pad 7 is embedded in the inner wall of the U-shaped groove 601. The screw passes through the top of the perforated rubber pad 7 and is fixedly connected to the inner wall of the switch cabinet or the installation position of the transformer body 1. The perforated rubber pad 7 has insulation properties, which further reduces the influence of current.

[0033] The above embodiments are only for illustrating the technical concept of this utility model and should not be construed as limiting the scope of protection of this utility model. Any modifications made to the technical solution based on the technical concept proposed by this utility model shall fall within the scope of protection of this utility model.

Claims

1. A high-insulation-performance instrument transformer, comprising an instrument transformer body (1), characterized in that... The transformer body (1) has a limiting protrusion (2) on its top. The transformer body (1) has a cover (3) on its top and above the limiting protrusion (2). The limiting protrusion (2) has a protective plate (4) on its top and inside the cover (3). The cover (3) has a fixing screw (5) on its top. The transformer body (1) has a mounting plate (6) on its bottom. The mounting plate (6) has perforated rubber pads (7) symmetrically arranged at both ends.

2. A transformer with high insulation performance according to claim 1, characterized in that, The top of the limiting protrusion (2) is horizontally embedded with a groove (201), and the top of the limiting protrusion (2) is vertically provided with a through groove (202).

3. A transformer with high insulation performance according to claim 1, characterized in that, The cover (3) has multiple wiring ports (301) on its side wall and a top block (302) on its top inner wall.

4. A high insulation performance mutual inductor according to claim 2, characterized in that, The guard plate (4) has multiple side plates (401) at both ends, and through holes (402) are provided at both ends of the guard plate (4). A sheet-like rubber pad (403) is provided on the inner side of the side plate (401).

5. A high insulation performance mutual inductor according to claim 4, characterized in that, The outer walls at both ends of the guard plate (4) are slidably connected to the inner wall of the cover (3), and the middle end of the guard plate (4) is correspondingly provided with the through groove (202).

6. A current transformer with high insulation performance according to claim 1, characterized in that, The bottom of the fixing screw (5) is threaded to the top of the transformer body (1).

7. A current transformer with high insulation performance according to claim 1, characterized in that, The mounting plate (6) has a T-shaped cross-section, and the mounting plate (6) has symmetrical U-shaped grooves (601) at both ends.

8. A high insulation performance mutual inductor according to claim 7, characterized in that, The perforated rubber pad (7) is embedded in the inner wall of the U-shaped groove (601).

Images