A transformer core grounding current testing device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-08-11
AI Technical Summary
[0002]变压器铁芯接地电流测试是电力系统中重要的电气试验项目，用于检测变压器铁芯的接地状态及接地回路的异常情况，对保障变压器安全稳定运行具有关键意义，现有的测试装置至少有以下弊端：1、现有的测试装置大多对线束缺少收纳，在使用完成后，线束裸露在外，容易发生损毁，影响使用寿命；2、现有的测试装置大多缺少防护，边角受到磕碰后，极易发生损伤，造成装置的故障，故此，我们推出一种变压器铁芯接地电流测试装置
1、本实用新型中，将防护软垫通过粘胶层粘贴在电流测试仪外表面，使防护软垫将电流测试仪的边角处进行包裹，从而对电流测试仪的边角处进行保护，通过在防护软垫前端设置两个延伸部，可以提高对边角处的防护效果，通过在防护软垫上端和下端设置凸起支撑部，凸起支撑部可以起到支撑作用，避免电流测试仪与桌面接触；
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Figure CN224624652U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current testing technology, and in particular to a transformer core grounding current testing device. Background Technology
[0002] Transformer core grounding current testing is an important electrical test item in power systems. It is used to detect the grounding status of the transformer core and abnormalities in the grounding circuit, which is crucial for ensuring the safe and stable operation of the transformer. Existing testing devices have at least the following drawbacks: 1. Most existing testing devices lack proper wiring harness storage, leaving the harness exposed after use, which is prone to damage and affects its service life; 2. Most existing testing devices lack protection, and the edges and corners are easily damaged by impacts, causing device failure. Therefore, we have introduced a transformer core grounding current testing device. Utility Model Content
[0003] The main purpose of this utility model is to provide a transformer core grounding current testing device, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A transformer core grounding current testing device includes a current tester. Two protective devices are fixedly connected to the left and right ends of the current tester. A display screen is fixedly connected to the front end of the current tester. A signal harness is fixedly connected to the front right end of the current tester. A wire clamp is fixedly connected to the end of the signal harness away from the current tester. A storage device is fixedly connected to the rear right end of the current tester.
[0005] Preferably, the storage device includes a bracket, a winding post is fixedly connected to the inner wall of the bracket, the front and rear ends of the winding post are both arc-shaped structures, the winding post is a "T" shaped structure, a protective cover is movably connected to the lower right end of the bracket, a connecting plate is fixedly connected to the front end of the bracket, a through hole is opened on the right side of the front end of the connecting plate, a threaded hole is opened on the front end of the protective cover, and a limit bolt is threadedly connected in the threaded hole.
[0006] By adopting the above technical solution, both the front and rear ends of the winding post are curved, which can prevent the winding post from scratching the wire harness.
[0007] Preferably, the bracket has an "L" shaped structure and is fixedly connected to the current tester.
[0008] Preferably, the left end of the protective cover is fixedly connected to two connecting parts, and the two connecting parts are fixedly connected to a connecting shaft, which is movably connected to the bracket.
[0009] Preferably, the protective cover has an internal hollow structure.
[0010] Preferably, the protective device includes a protective pad with a "U"-shaped structure. The upper and lower ends of the protective pad are fixedly connected to protruding support portions. The ends of the two protruding support portions away from the protective pad are arc-shaped. The upper and lower front ends of the protective pad are fixedly connected to extension portions, both of which are "L"-shaped. An adhesive layer is fixedly connected to the inner wall of the protective pad.
[0011] Preferably, the protective pad is bonded to the current tester via an adhesive layer, and the protective pad is in contact with the left, upper, and lower ends of the current tester.
[0012] This utility model has the following beneficial effects: 1. In this utility model, the protective pad is pasted to the outer surface of the current tester with an adhesive layer, so that the protective pad wraps around the corners of the current tester, thereby protecting the corners of the current tester. By setting two extensions at the front end of the protective pad, the protection effect on the corners can be improved. By setting protruding support parts at the upper and lower ends of the protective pad, the protruding support parts can play a supporting role and prevent the current tester from contacting the table. 2. In this utility model, by setting up a storage device, the protective cover is opened to expose the bracket and the winding post installed on the bracket. After the signal harness is unplugged from the current tester, the signal harness is wound around the winding post. After the winding is completed, the protective cover is put on, and then the limiting bolt is threaded through the connecting plate and connected to the protective cover to limit the protective cover and the bracket, thereby protecting the signal harness and preventing it from being exposed. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a transformer core grounding current testing device according to the present invention. Figure 2 This is a schematic diagram of the overall structure of the protective device of the transformer core grounding current testing device of this utility model; Figure 3 This is a schematic diagram of the overall structure of the storage device for a transformer core grounding current testing device according to this utility model; Figure 4 This is a schematic diagram of the overall structure of the protective cover of the transformer core grounding current testing device of this utility model.
[0014] In the diagram: 1. Current tester; 2. Signal harness; 3. Protective device; 4. Storage device; 5. Display screen; 6. Wire clamp; 31. Protective pad; 32. Extension; 33. Protruding support; 34. Adhesive layer; 41. Bracket; 42. Protective cover; 43. Winding post; 44. Connecting plate; 45. Through hole; 46. Limit bolt; 47. Threaded hole; 421. Connecting part; 422. Connecting shaft. Detailed Implementation
[0015] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0016] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0018] Please see Figure 1-4 This utility model provides a technical solution: A transformer core grounding current testing device includes a current tester 1. Two protective devices 3 are fixedly connected to the left and right ends of the current tester 1. A display screen 5 is fixedly connected to the front end of the current tester 1. A signal harness 2 is fixedly connected to the front right end of the current tester 1. A wire clamp 6 is fixedly connected to the end of the signal harness 2 away from the current tester 1. A storage device 4 is fixedly connected to the rear right end of the current tester 1.
[0019] In this embodiment, the storage device 4 includes a bracket 41, with a winding post 43 fixedly connected to the inner wall of the bracket 41. The front and rear ends of the winding post 43 are both arc-shaped structures, and the winding post 43 has a "T"-shaped structure. A protective cover 42 is movably connected to the lower right end of the bracket 41. A connecting plate 44 is fixedly connected to the front end of the bracket 41. A through hole 45 is opened on the right side of the front end of the connecting plate 44. A threaded hole 47 is opened at the front end of the protective cover 42, and a limit bolt 46 is threadedly connected to the threaded hole 47. The bracket 41 has an "L"-shaped structure and is fixedly connected to the current tester 1. Two connecting parts 421 are fixedly connected to the left end of the protective cover 42. The two connecting parts 421 are fixedly connected to a connecting shaft 422, and the connecting shaft 422 is movably connected to the bracket 41. The protective cover 42 has an internal hollow structure.
[0020] The above method involves: flipping the protective cover 42 to open it, thereby exposing the bracket 41 and the winding post 43 mounted on the bracket 41. The surface of the winding post 43 is smoothed to prevent wear on the signal harness 2. Then, the signal harness 2 connected to the current tester 1 is carefully unplugged, taking care to avoid excessive pulling that could damage the internal circuitry of the signal harness 2. Next, one end of the signal harness 2 is fixed at the starting position of the winding post 43, and then the signal harness 2 is evenly wound around the winding post 43 in a certain direction and pattern to protect it.
[0021] In this embodiment, the protective device 3 includes a protective pad 31, which has a "U" shaped structure. The upper and lower ends of the protective pad 31 are fixedly connected to protruding support portions 33. The ends of the two protruding support portions 33 away from the protective pad 31 are arc-shaped. The upper and lower front ends of the protective pad 31 are fixedly connected to extension portions 32, which are both "L" shaped structures. An adhesive layer 34 is fixedly connected to the inner wall of the protective pad 31. The protective pad 31 is bonded to the current tester 1 through the adhesive layer 34, and the protective pad 31 is in contact with the left, upper, and lower ends of the current tester 1.
[0022] Through the above solution: the protective pad 31 is provided with a raised support part 33 and an extension part 32. The raised support part 33 can effectively disperse the external impact force and prevent the impact force from directly acting on the corners of the current tester 1; the extension part 32 further expands the protection range and provides all-round protection for the current tester 1.
[0023] It should be noted that this utility model describes a transformer core grounding current testing device. First, a protective pad 31 that matches the dimensions of the current tester 1 is selected. One side of the protective pad 31 has an adhesive layer 34, which is made of high-strength, aging-resistant, high-quality adhesive material to ensure a firm bond and prevent it from easily falling off. The side of the protective pad 31 with the adhesive layer 34 is precisely aligned with one corner of the current tester 1, and gently pressed to ensure a tight fit, completing the attachment of the first protective pad 31. Then, following the same method, the protective pads 31 of the remaining three protective devices 3 are attached to the other three corners of the current tester 1. At each corner, each protective pad 31 is equipped with a raised support 33 and an extension 32. The raised support 33 can effectively disperse external impact forces, preventing them from directly impacting the corners of the current tester 1. The extension 32 further expands the protection range, providing all-around protection for the current tester 1. Through the synergistic effect of these four protective pads 31, the protection effect of the current tester 1 can be significantly increased, minimizing the risk of damage from bumps and knocks during daily use and transportation, and extending its service life. After completing the current testing, the signal harness 2 needs to be properly stored and protected. Gently pry open the protective cover 42 by hand to remove it. Open the tray 41 to expose the bracket 41 and the winding post 43 mounted on it. The surface of the winding post 43 is smoothed to prevent wear on the signal harness 2. Then, carefully unplug the signal harness 2 connected to the current tester 1, taking care to avoid excessive pulling that could damage the internal circuitry of the signal harness 2. Next, fix one end of the signal harness 2 to the starting position of the winding post 43, and then evenly wind the signal harness 2 around the winding post 43 in a specific direction and pattern. During the winding process, be careful to keep the signal harness 2 neat and avoid crossing or knotting. After the signal harness 2 is completely wound, slowly close the protective cover 42. To ensure accurate alignment between the protective cover 42 and the current tester 1, locate the connecting plate 44, which has threaded holes matching the limiting bolt 46. Pass the limiting bolt 46 through the threaded holes on the connecting plate 44 and screw it into the corresponding threaded holes on the protective cover 42. Through the threaded connection, the protective cover 42 and the bracket 41 are reliably limited and fixed. In this way, the signal harness 2 is properly housed inside the protective cover 42, avoiding exposure to the outside. This effectively prevents the signal harness 2 from being corroded, damaged, or accidentally pulled by the external environment, ensuring the normal use of the signal harness 2 and the overall performance of the current tester 1.
[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A transformer core grounding current testing device, comprising a current tester (1), characterized in that: The current tester (1) has two protective devices (3) fixedly connected to its left and right ends. The current tester (1) has a display screen (5) fixedly connected to its front end. The current tester (1) has a signal harness (2) fixedly connected to its front right end. The end of the signal harness (2) away from the current tester (1) is fixedly connected to a wire clamp (6). The current tester (1) has a storage device (4) fixedly connected to its rear right end. The storage device (4) includes a bracket (41), and a winding post (43) is fixedly connected to the inner wall of the bracket (41). The front and rear ends of the winding post (43) are arc-shaped structures. The winding post (43) is a "T"-shaped structure. A protective cover (42) is movably connected to the lower right end of the bracket (41). A connecting plate (44) is fixedly connected to the front end of the bracket (41). A through hole (45) is opened on the right side of the front end of the connecting plate (44). A threaded hole (47) is opened at the front end of the protective cover (42). A limit bolt (46) is threadedly connected inside the threaded hole (47).
2. The transformer core grounding current testing device according to claim 1, characterized in that: The bracket (41) has an "L" shaped structure and is fixedly connected to the current tester (1).
3. The transformer core grounding current testing device according to claim 1, characterized in that: The left end of the protective cover (42) is fixedly connected to two connecting parts (421), and the two connecting parts (421) are fixedly connected to a connecting shaft (422). The connecting shaft (422) is interlocked with the bracket (41).
4. The transformer core grounding current testing device according to claim 1, characterized in that: The protective cover (42) has an internal hollow structure.
5. The transformer core grounding current testing device according to claim 1, characterized in that: The protective device (3) includes a protective pad (31), which has a "U" shaped structure. The upper and lower ends of the protective pad (31) are fixedly connected to protruding support parts (33). The ends of the two protruding support parts (33) away from the protective pad (31) are arc-shaped. The upper and lower front ends of the protective pad (31) are fixedly connected to extension parts (32), which are both "L" shaped. The inner wall of the protective pad (31) is fixedly connected to an adhesive layer (34).
6. The transformer core grounding current testing device according to claim 5, characterized in that: The protective pad (31) is bonded to the current tester (1) through an adhesive layer (34), and the protective pad (31) is in contact with the left, upper and lower ends of the current tester (1).