Current transformer for switch cabinet

Abstract

The utility model discloses a current transformer for a switch cabinet, which comprises a bottom plate, a current transformer shell arranged at the top of the bottom plate and a wiring terminal arranged on the current transformer shell, mounting grooves are symmetrically arranged on the bottom plate, and embedded blocks are detachably arranged in the mounting grooves. A plurality of first clamping teeth distributed at equal intervals are symmetrically arranged on the inner side wall of the mounting groove, second clamping teeth meshed with the first clamping teeth are symmetrically arranged on the outer side of the embedded block, a plurality of round holes are formed in the middle of the embedded block in a penetrating mode, and a blocking strip is arranged at the bottom of each first clamping tooth; the front and back positions of the round holes can be adjusted through the installation groove, the embedded block, the first clamping teeth and the second clamping teeth, the round holes can be easily aligned with the installation hole positions during installation, bolts can penetrate through the round holes to be screwed into the installation hole positions, the installation difficulty is reduced, and meanwhile compared with traditional kidney-shaped holes, the round holes have the advantages that the installation efficiency is improved, and the installation cost is reduced. And the bolt and the embedded block do not move, so that the mounting firmness of the bottom plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of current transformer technology, specifically a current transformer for switchgear. Background Technology

[0002] A current transformer in a switchgear is a commonly used power measurement device. Its main function is to convert the current in a high-voltage line into a low-voltage signal and output it to a protection device or monitoring system to monitor and protect the switchgear.

[0003] Existing current transformers are generally fixed inside the switch cabinet with bolts. In order to facilitate the alignment of the bolts with the mounting holes in the switch cabinet, the bolt holes on the base plate of the current transformer are usually designed as oval holes. Although oval holes can make it easier for the bolts to be aligned with the mounting holes, their effect is very limited. If the mounting hole position is inaccurate, it is difficult to align them, and the holes must be re-drilled. Furthermore, the bolts and oval holes are prone to movement, resulting in the current transformer not being installed securely. Utility Model Content

[0004] The purpose of this invention is to provide a current transformer for switchgear to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a current transformer for switchgear, comprising a base plate, a current transformer housing mounted on the top of the base plate, and terminals disposed on the current transformer housing. The base plate is symmetrically provided with mounting grooves, and inserts are detachably mounted inside the mounting grooves. The inner sidewall of the mounting groove is symmetrically provided with a plurality of first locking teeth distributed at equal intervals. The outer side of the insert is symmetrically provided with second locking teeth that mesh with the first locking teeth. The center of the insert is provided with a plurality of circular holes, and the bottom of the first locking teeth is provided with a stop bar.

[0006] As a preferred embodiment of this utility model, the plurality of circular holes are equidistantly distributed on the same straight line, and the adjacent circular holes partially overlap.

[0007] In a preferred embodiment of this utility model, the first locking tooth, the stop bar, and the base plate are integrally formed.

[0008] As a preferred embodiment of this utility model, an insulator is provided on the outside of the wiring terminal.

[0009] As a preferred embodiment of this utility model, the current transformer housing and the insulator are integrally formed.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: the utility model makes the front and rear positions of the round hole adjustable by setting the mounting groove, insert, first locking tooth and second locking tooth, and there are multiple round holes, so that the round holes can be easily aligned with the mounting hole position during installation, so that the bolt can pass through the round hole and be screwed into the mounting hole position, reducing the installation difficulty. At the same time, compared with the traditional oval hole, the bolt and the insert will not move, improving the stability of the base plate installation. Attached Figure Description

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0012] Figure 2 For this utility model Figure 1 Enlarged view of point A in the middle;

[0013] Figure 3 This is an exploded view of the present invention;

[0014] Figure 4 For this utility model Figure 3 Enlarged view of point B in the middle.

[0015] In the diagram: 1. Base plate; 2. Current transformer housing; 3. Insulator; 4. Terminal block; 5. Mounting groove; 6. Stop bar; 7. First locking tooth; 8. Second locking tooth; 9. Insert; 10. Round hole. Detailed Implementation

[0016] 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.

[0017] Please see Figures 1 to 4This utility model provides a technical solution: a current transformer for switchgear, including a base plate 1, a current transformer housing 2 mounted on the top of the base plate 1, the internal structure of the current transformer housing 2 being prior art and therefore not described in detail, and terminals 4 disposed on the current transformer housing 2. The base plate 1 has symmetrically arranged mounting grooves 5, and inserts 9 are detachably installed inside the mounting grooves 5. Moving the inserts 9 upwards allows for disassembly. The mounting grooves 5 and inserts 9 allow for adjustment of the front and rear positions of the circular holes 10. Multiple circular holes 10 are provided, making it easy to align the circular holes 10 with the mounting positions during installation, facilitating bolts to pass through the circular holes 10 and be screwed into the mounting positions, reducing installation difficulty. Multiple... A first locking tooth 7 is evenly distributed. A second locking tooth 8 is symmetrically provided on the outer side of the insert 9 to mesh with the first locking tooth 7. The second locking tooth 8 cooperates with the first locking tooth 7 to fix the insert 9 and prevent the insert 9 from moving in the mounting groove 5. Multiple round holes 10 are provided through the middle of the insert 9. During installation, the bolt passes through the round holes 10 and is screwed into the mounting hole to fix the base plate 1, thereby realizing the installation and fixation of the current transformer housing 2. Compared with the traditional oval hole, the multiple round holes 10 will not move between the bolt and the insert 9, improving the firmness of the base plate 1 installation. A stop bar 6 is provided at the bottom of the first locking tooth 7. The stop bar 6 is used to block the second locking tooth 8 and prevent the stop bar 6 from moving downward through the mounting groove 5, causing the stop bar 6 to separate from the mounting groove 5.

[0018] In this configuration, multiple circular holes 10 are equidistantly distributed on the same straight line, and adjacent circular holes 10 partially overlap, which allows for the setting of a greater number of circular holes 10 within the same length.

[0019] The first locking tooth 7, the stop bar 6, and the base plate 1 are integrated into one piece, which ensures that they have sufficient structural strength.

[0020] Among them, the outside of the terminal 4 is provided with an insulator 3. The insulator 3 is used to provide electrical isolation, ensuring that the terminal 4 is electrically isolated from the surrounding environment, preventing current from flowing through unexpected paths, thereby ensuring the safe and stable operation of the power system.

[0021] The current transformer housing 2 and the insulator 3 are integrally molded structures, and the current transformer housing 2 and the insulator 3 are integrally cast with epoxy resin, which has good insulation properties.

[0022] Specifically, during installation, first remove the insert 9 from the mounting slot 5, align the round hole 10 with the mounting hole, then place the insert 9 back into the mounting slot 5. The second locking tooth 8 engages with the first locking tooth 7 to fix the insert 9 and prevent movement between the insert 9 and the base plate 1. Finally, take the bolt, pass it through the round hole 10, and screw it into the mounting hole to fix the base plate 1, thereby achieving the installation and fixation of the current transformer housing 2. Depending on the actual situation, the number of inserts 9 can be increased, so that more bolts can be used for fixing, making the installation more secure.

[0023] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] 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 current transformer for a switchgear, comprising a base plate (1), a current transformer housing (2) mounted on the top of the base plate (1), and terminals (4) disposed on the current transformer housing (2), characterized in that: The base plate (1) is symmetrically provided with mounting grooves (5). An insert (9) is detachably installed inside the mounting groove (5). The inner sidewall of the mounting groove (5) is symmetrically provided with a plurality of first locking teeth (7) distributed at equal intervals. The outer side of the insert (9) is symmetrically provided with second locking teeth (8) that mesh with the first locking teeth (7). The middle part of the insert (9) is provided with a plurality of round holes (10). The bottom of the first locking teeth (7) is provided with a stop strip (6).

2. A current transformer for switchgear according to claim 1, characterized in that: Multiple circular holes (10) are equidistantly distributed on the same straight line, and adjacent circular holes (10) partially overlap.

3. A current transformer for switchgear according to claim 1, characterized in that: The first tooth (7), the stop bar (6) and the base plate (1) are integrally formed.

4. A current transformer for switchgear according to claim 1, characterized in that: An insulator (3) is provided on the outside of the terminal (4).

5. A current transformer for switchgear according to claim 4, characterized in that: The current transformer housing (2) and the insulator (3) are integrally formed.

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