Voltage current transformer secondary wiring terminal protection cover and voltage current transformer

Abstract

The utility model relates to a voltage current transformer technical field, concretely relates to voltage current transformer secondary wiring terminal protection cover and voltage current transformer, including erecting the protection cover body and vertically setting support subassembly on the secondary wiring terminal of mutual inductor above, support subassembly is constituted by insulating screw rod, insulating support piece and insulating spacer, the tail of insulating screw rod is set through the protection cover body, the rod body of insulating spacer is set on the insulating screw rod in the upper end of protection cover body, the rod body of insulating screw rod is set on the insulating support piece in the lower end of protection cover body. The utility model through erecting the protection cover body in mutual inductor secondary wiring terminal above, reduced internal space occupation, can effectively avoid cable bending and cause insulating skin breakage, at the same time, it is convenient for the quick removal during overhauling, the insulating material quality and structure design of support subassembly can avoid metal interference, reduce cable pulling, keep wiring neat, improve fastening and aesthetic degree.

Description

Technical Field

[0001] This utility model relates to the field of voltage and current transformer technology, and more specifically, to a protective cover for the secondary terminals of a voltage and current transformer and a voltage and current transformer. Background Technology

[0002] In power systems, the secondary terminals of voltage and current transformers are usually protected by white transparent plastic covers and fixed with metal screws to prevent conductors such as metal slag and small animals from falling onto the secondary terminals, thereby avoiding short circuits in the transformers.

[0003] In practical applications, the effectiveness of the protective cover is affected by the number of secondary cables. When the number of secondary cables is small, the cover is easy to close and can be firmly fixed after the secondary wiring is led out from the outlet hole of the transparent cover. However, when the number of secondary cables is large, due to the small space inside the transparent cover, the cable led out from the transformer needs to be bent and skewed before it can be led out from the outlet hole. This will lead to the following problems: (1) The secondary wiring inside the protective cover is easily squeezed, which will cause the insulation to break and threaten the normal operation of the system; (2) It is not convenient for daily inspection and maintenance, and at the same time affects the tightness and aesthetics of the wiring. Utility Model Content

[0004] The purpose of this utility model is to provide a protective cover for the secondary terminals of a voltage and current transformer and a voltage and current transformer, so as to solve the technical problems pointed out in the background art.

[0005] This utility model is achieved through the following technical solution: a protective cover for the secondary terminals of a voltage and current transformer, including a protective cover body mounted above the secondary terminals of the transformer and a support assembly vertically mounted on the protective cover body. The support assembly consists of an insulating screw, an insulating support member, and an insulating gasket. The tail of the insulating screw penetrates the protective cover body. The insulating gasket is fitted onto the upper part of the insulating screw within the protective cover body. The insulating support member is fitted onto the lower part of the insulating screw within the protective cover body. According to a preferred embodiment, the protective cover body is a transparent cover.

[0006] According to a preferred embodiment, the protective cover body is provided with two support components, which are symmetrically distributed from left to right.

[0007] According to a preferred embodiment, the protective cover body has a waist-shaped hole, and the insulating screw passes through the waist-shaped hole.

[0008] According to a preferred embodiment, the waist-shaped hole is opened on a first side of the protective cover body away from the primary portion of the transformer, and the second side of the protective cover body opposite to the first side abuts against the sidewall of the primary portion of the transformer.

[0009] According to a preferred embodiment, the length and width of the protective cover body are the same as the length and width of the secondary part of the current transformer.

[0010] According to a preferred embodiment, the insulating pad includes an insulating flat pad and an insulating spring pad, wherein the insulating spring pad is disposed at the upper end of the insulating flat pad.

[0011] According to a preferred embodiment, the surface of the insulating flat pad is provided with anti-slip texture, and its shape matches the waist-shaped hole; The shape of the insulating spring washer matches that of the insulating flat washer.

[0012] According to a preferred embodiment, the surface of the insulating screw is coated with an anti-aging coating.

[0013] This utility model also provides a voltage and current transformer, including the protective cover for the secondary terminals of the voltage and current transformer as described above.

[0014] The technical solution of the voltage and current transformer secondary terminal protective cover and voltage and current transformer provided by this utility model has at least the following advantages and beneficial effects: (1) The support assembly, through the cooperation of insulating screws, insulating support parts and insulating gaskets, mounts the protective cover body above the transformer secondary terminal. Compared with the traditional transparent cover with wire outlet holes, it reduces the occupation of internal space and provides more sufficient arrangement space for a large number of secondary cables, avoiding the stress and pressure and insulation damage caused by the cable being forced to bend or tilt due to the small space; (2) The protective cover body is detachably connected to the support assembly through the insulating screws. Compared with the traditional fixed structure transparent cover, it is easier to disassemble and install. When it is necessary to inspect and maintain the secondary terminal, the protective cover body can be quickly removed; (3) The insulation material and structural design of the support assembly not only avoid the interference of metal parts to the cable, but also reduce the pulling of the cable due to improper installation of the protective cover by stably mounting the protective cover body, which helps to maintain the regularity of the secondary wiring, improve the tightness of the wiring and the overall aesthetics. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation of the protective cover for the secondary terminals of the voltage and current transformer provided in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the structure of the support component provided in Embodiment 1 of this utility model; Reference numerals: 100-protective cover body, 200-support assembly, 210-insulating screw, 220-insulating support, 230-insulating flat washer, 240-insulating spring washer, 300-primary part of transformer, 400-secondary part of transformer, 410-secondary terminal block. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Example 1 This embodiment provides a protective cover for the secondary terminals of a voltage and current transformer. Figure 1 This is a schematic diagram showing the installation of the protective cover for the secondary terminals of the voltage and current transformer. (See attached diagram) Figure 1 As shown, the protective cover for the secondary terminals of the voltage and current transformer includes a protective cover body 100 mounted above the secondary terminals 410 of the transformer and a support assembly 200 vertically mounted on the protective cover body 100.

[0018] See Figure 2 As shown, the support assembly 200 consists of an insulating screw 210, an insulating support 220, and an insulating gasket; wherein, the tail of the insulating screw 210 penetrates through the protective cover body 100 and is installed and fixed by engaging with the screw hole opened on the base of the secondary part 400 of the current transformer.

[0019] An insulating gasket is fitted onto the rod of the insulating screw 210 located at the upper end of the protective cover body 100. Through its cooperation with the insulating screw 210 and the protective cover body 100, it increases the contact area, disperses the pressure, and makes the insulating screw 210 more firmly fixed to the protective cover body 100, preventing the protective cover body 100 from loosening or shifting during use. The insulating support 220 is sleeved on the rod of the insulating screw 210 located at the lower end of the protective cover body 100. It can support the protective cover body 100 above the secondary terminal 410 of the current transformer, forming a certain space distance. This avoids the protective cover body 100 directly pressing on the secondary terminal 410 or the cable, providing sufficient space for the secondary cable and reducing the problems of bending, skewing and insulation damage caused by the compression of the cable.

[0020] Specifically, the support assembly 200, through the cooperation of the insulating screw 210, the insulating support 220, and the insulating gasket, mounts the protective cover body 100 above the secondary wiring terminal 410 of the current transformer. Compared with traditional transparent covers with cable outlet holes, this reduces the space occupied internally, providing more ample space for a larger number of secondary cables and preventing the cables from being forced to bend or tilt due to limited space, resulting in stress compression and insulation damage. The protective cover body 100 is detachably connected to the support assembly 200 via the insulating screw 210, which is easier to disassemble and install than traditional fixed transparent covers. When maintenance of the secondary wiring terminal 410 is required, the protective cover body 100 can be quickly removed. In addition, the insulation material and structural design of the support assembly 200 not only avoid interference from metal parts to the cables, but also reduce the pulling of cables due to improper installation of the protective cover body 100 by stably mounting the protective cover body 100, which helps maintain the neatness of the secondary wiring and improves the tightness and overall aesthetics of the wiring.

[0021] Example 2 This embodiment further explains the structure of the protective cover body 100 based on the technical solution provided in Embodiment 1: The protective cover body 100 is a transparent cover, which allows operators to directly observe the connection status and any abnormalities of the secondary wiring terminals 410 and internal cables of the current transformer without disassembling the protective cover. This reduces the operating costs caused by frequently disassembling the protective cover for inspection and improves the convenience of daily inspection and maintenance.

[0022] The protective cover body 100 is provided with two support components 200, which are symmetrically distributed on the left and right sides, so that the protective cover body 100 can be evenly supported and fixed from both sides. Compared with a single support component 200, it can prevent the protective cover body 100 from tilting or shaking due to uneven force, and ensure that it is stably mounted above the secondary wiring terminal 410 of the current transformer. In particular, it can better maintain its positional stability when facing external vibration or slight collision.

[0023] The protective cover body 100 has an oblong hole through which the insulating screw 210 passes. The elongated structure of the oblong hole provides the insulating screw 210 with space to move along the length of the hole, allowing the protective cover body 100 to be adjusted relative to the insulating screw 210 to adapt to the positional differences of the secondary terminals 410 of the current transformer under different models or installation scenarios, as well as the changes in the number and arrangement of secondary cables. This avoids installation difficulties caused by the inability to adjust the fixed hole position and ensures that the protective cover body 100 can accurately cover the area of ​​the secondary terminals 410.

[0024] The waist-shaped hole is opened on the first side of the protective cover body 100 away from the primary part 300 of the current transformer. The second side of the protective cover body 100, which is opposite to the first side, abuts against the side wall of the primary part 300 of the current transformer. This forms a positioning method based on the side wall of the primary part 300 of the current transformer, which can ensure that the protective cover body 100 accurately covers the area of ​​the secondary wiring terminal 410 of the current transformer, avoid protection omissions due to positional deviation, and ensure comprehensive protection.

[0025] The length and width of the protective cover body 100 are the same as the length and width of the secondary part 400 of the current transformer, which can completely cover the secondary part area where the secondary wiring terminal 410 of the current transformer is located. This ensures that conductors such as metal slag and small animals cannot enter from the edge gaps of the protective cover and the secondary part, avoiding the risk of short circuit due to insufficient protection range, and further improving the comprehensiveness and reliability of protection.

[0026] Example 3 This embodiment, based on the technical solution provided in Embodiment 2, further explains the structure of the support component 200: The insulating gasket includes an insulating flat gasket 230 and an insulating spring gasket 240. The insulating spring gasket 240 is located at the upper end of the insulating flat gasket 230. The insulating spring gasket 240 is elastic and will generate a continuous pre-tightening force due to pressure during installation. This pre-tightening force can effectively compensate for the loosening of the insulating screw 210 caused by factors such as vibration and thermal expansion and contraction. Together with the pressing action of the insulating flat gasket 230 on the protective cover body 100, a double fastening effect is formed to ensure that the protective cover body 100 remains stable during long-term use and avoids protection failure or positional displacement due to loosening.

[0027] The surface of the insulating flat washer 230 is provided with anti-slip texture, and its shape matches the waist-shaped hole. The anti-slip texture on the surface of the insulating flat washer 230 can increase the friction with the upper end of the protective cover body 100. Combined with its shape matching the waist-shaped hole, it can effectively prevent the insulating flat washer 230 from sliding or shifting at the waist-shaped hole, ensuring that it always forms a stable limit on the insulating screw 210.

[0028] The shape of the insulating spring washer 240 matches that of the insulating flat washer 230, thus allowing them to fit tightly together. This prevents the spring washer from becoming misaligned due to shape mismatch, ensuring uniform transmission of preload and further enhancing the fixation reliability of the entire support assembly 200. It also reduces the risk of loosening of the protective cover body 100 under vibration or external force.

[0029] The surface of the insulating screw 210 is coated with an anti-aging coating, which can effectively resist the effects of environmental factors such as temperature and humidity, slow down the aging rate of the insulating screw 210, and avoid problems such as material deterioration and mechanical performance degradation due to long-term use, thereby extending the service life of the insulating screw 210 and reducing the replacement frequency and maintenance costs.

[0030] Example 4 This embodiment is based on the technical solution provided in any one of Embodiments 1 to 3, and provides a voltage and current transformer including a protective cover for the secondary terminals of the voltage and current transformer as provided in any one of Embodiments 1 to 3.

[0031] The function and technical effect of the secondary terminal protective cover included in the voltage and current transformer of this embodiment are the same as those of the embodiment of the secondary terminal protective cover, and will not be repeated here.

[0032] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective cover for the secondary terminals of a voltage and current transformer, characterized in that, Includes a protective cover body (100) mounted above the secondary wiring terminals (410) of the current transformer and a support assembly (200) vertically mounted on the protective cover body (100); The support assembly (200) consists of an insulating screw (210), an insulating support (220), and an insulating gasket. The tail of the insulating screw (210) penetrates the protective cover body (100). The insulating gasket is sleeved on the upper part of the insulating screw (210) on the protective cover body (100). The insulating support (220) is sleeved on the lower part of the insulating screw (210) on the protective cover body (100).

2. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 1, characterized in that, The protective cover body (100) is a transparent cover.

3. The protective cover for the secondary terminals of the voltage and current transformer as described in claim 2, characterized in that, The protective cover body (100) is provided with two support components (200), and the two support components (200) are symmetrically distributed from left to right.

4. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 3, characterized in that, The protective cover body (100) has a waist-shaped hole, and the insulating screw (210) is installed through the waist-shaped hole.

5. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 4, characterized in that, The waist-shaped hole is opened on the first side of the protective cover body (100) away from the primary part (300) of the current transformer, and the second side of the protective cover body (100) opposite to the first side abuts against the side wall of the primary part (300) of the current transformer.

6. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 5, characterized in that, The length and width of the protective cover body (100) are the same as the length and width of the secondary part (400) of the current transformer.

7. The protective cover for the secondary terminals of a voltage and current transformer as described in any one of claims 4 to 6, characterized in that, The insulating pad includes an insulating flat pad (230) and an insulating spring pad (240), wherein the insulating spring pad (240) is disposed at the upper end of the insulating flat pad (230).

8. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 7, characterized in that, The surface of the insulating flat pad (230) is provided with anti-slip texture, and its shape matches the waist-shaped hole; The shape of the insulating spring washer (240) matches that of the insulating flat washer (230).

9. The protective cover for the secondary terminals of a voltage and current transformer as described in claim 1, characterized in that, The surface of the insulating screw (210) is coated with an anti-aging coating.

10. A voltage and current transformer, characterized in that, Includes the protective cover for the secondary terminals of the voltage and current transformer as described in any one of claims 1 to 9.

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