Short circuit device for alternating current withstand voltage test

Abstract

The utility model discloses a short circuit device for an alternating current withstand voltage test, and relates to the technical field of alternating current withstand voltage tests. The device comprises a short-circuit wire, a first jointing clamp and a second jointing clamp, one end of the short-circuit wire is fixedly connected to the first jointing clamp, and the other end of the short-circuit wire is fixedly connected to the second jointing clamp; the short-circuit wire is of a rigid structure. According to the short-circuit device, the short-circuit wire of a rigid structure is connected with the first wiring clamp and the second wiring clamp, compared with a bare wire used by a traditional short-circuit wire, potential safety hazards caused by the fact that the short-circuit wire swings due to external force factors and makes contact with test equipment are avoided, and the practicability and reliability of the short-circuit device are remarkably improved. In addition, a telescopic junction pole is arranged, so that the multifunctionality of the device is improved, the risk of high-altitude operation is reduced, and the safety of field operation is ensured.

Description

Technical Field

[0001] This application relates to the technical field of AC withstand voltage tests, and particularly to a short - circuit device for AC withstand voltage tests. Background Art

[0002] The AC withstand voltage test is an effective method for judging the insulation strength of electrical equipment. It can test the ability of electrical equipment insulation strength to withstand long - term power frequency voltage and power frequency voltage rise. Measuring the AC withstand voltage test of the reactor winding together with the bushing uses a test voltage that is a certain multiple higher than the rated voltage to replace the atmospheric over - voltage and internal over - voltage to assess the insulation performance of the reactor, and at the same time, to test the installation process of the reactor. When conducting the wiring for the AC withstand voltage test of the reactor, the head and tail of the reactor winding need to be short - circuited, and the short - circuit wire needs to be fixed in position and maintain a sufficient safety distance from the equipment shell and other parts.

[0003] When conducting the AC withstand voltage test on the reactor, the existing short - circuit device for AC withstand voltage tests uses bare wires. Since the bare wires are of a flexible structure and cannot maintain deformation, there will be a swinging situation caused by insecure fixation, which makes the bare wires contact the bushing shell. This will not only interrupt the test process but may also cause electric shock accidents or damage the equipment insulation. At the same time, when conducting the withstand voltage test, there may be a situation where the position of the high - voltage bushing is too high and high - altitude wiring is required. The existing test device does not have the function of adjusting the height, and it requires operators to work at high altitude to complete the wiring, which increases the risk of falling from a height and poses a threat to personnel safety. Utility Model Content

[0004] In view of this, this application provides a short - circuit device for AC withstand voltage tests, mainly aiming to solve the technical problem that the bare wires of the existing short - circuit device for AC withstand voltage tests contact the bushing shell, which will not only interrupt the test process but may also cause electric shock accidents or damage the equipment insulation.

[0005] This application provides a short - circuit device for AC withstand voltage tests, including a short - circuit wire, a first wiring clip, and a second wiring clip. Among them,

[0006] One end of the short - circuit wire is fixedly connected to the first wiring clip, and the other end of the short - circuit wire is fixedly connected to the second wiring clip;

[0007] The short - circuit wire is of a rigid structure.

[0008] In a feasible implementation manner, the short - circuit wire is connected between the first wiring clip and the second wiring clip in a fixed shape.

[0009] In a feasible implementation manner, the short - circuit wire includes an outer skin and an inner core. The material of the outer skin is a rigid hard material, and the material of the inner core is copper.

[0010] In a feasible embodiment, the inner core of the short connection wire is welded at the edges of the first connection clip and the second connection clip.

[0011] In a feasible embodiment, both the first connection clip and the second connection clip are in a concave-shaped flat structure, and the materials of the first connection clip and the second connection clip are copper.

[0012] In a feasible embodiment, clamping portions are provided on both the first connection clip and the second connection clip.

[0013] In a feasible embodiment, a connection rod is further included. Wherein, the connection rod includes a support rod, a telescopic mechanism and a clamping mechanism. The support rod is connected to the telescopic mechanism, the telescopic mechanism is connected to the clamping mechanism, and the clamping mechanism is detachably connected to the clamping portions of the first connection clip and the second connection clip.

[0014] In a feasible embodiment, a first control switch is provided on the support rod, and the first control switch is used to control the connection between the clamping mechanism and the clamping portion.

[0015] In a feasible embodiment, the telescopic mechanism includes a motor and a telescopic rod. The support rod is connected to the motor, the motor is connected to the telescopic rod, the telescopic rod is connected to the clamping mechanism, and the motor is used to provide power to the telescopic rod.

[0016] In a feasible embodiment, a second control switch is further provided on the support rod, and the second control switch is used to control the motor to drive the telescopic mechanism to extend or shorten.

[0017] The present application provides a short-circuiting device for AC withstand voltage test, including a short connection wire, a first connection clip and a second connection clip. Wherein, one end of the short connection wire is fixedly connected to the first connection clip, and the other end of the short connection wire is fixedly connected to the second connection clip; the short connection wire is of a rigid structure. The present application uses a short connection wire of a rigid structure to be connected to the first connection clip and the second connection clip. Compared with the bare wire used in traditional short connection wires, it avoids the safety hazards caused by the swing of the short connection wire contacting the test equipment due to external force factors, and significantly enhances the practicability and reliability of the short-circuiting device. In addition, a telescopic connection rod is also equipped, which not only improves the versatility of the device, but also reduces the risk of high-altitude operation and ensures the safety of on-site operation.

[0018] Other features and advantages of the present utility model will be described in the subsequent specification, and in part, will become apparent from the specification or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained by the structures specifically pointed out in the written specification, claims, and drawings.

[0019] The technical solutions of the present utility model will be further described in detail below through the drawings and embodiments. Description of the Drawings

[0020] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The illustrative embodiments and descriptions thereof are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0021] Figure 1 The structural schematic diagram of a short-circuit device for AC withstand voltage test provided by an embodiment of the present application is shown;

[0022] Figure 2 The structural schematic diagram of a wiring rod provided by an embodiment of the present application is shown.

[0023] In the drawings:

[0024] 1. Short-circuit wire; 21. First wiring clip; 22. Second wiring clip; 3. Clamping mechanism; 4. Telescopic rod; 5. Motor; 6. Support rod; 7. First control switch; 8. Second control switch. Detailed Embodiments

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0027] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] As the core of energy conversion and transmission in the power grid, power transformers and reactors are the most critical and expensive equipment in power transmission and transformation equipment. Their operating reliability is directly related to the economic operation and safe and stable operation of the power grid. In the factory acceptance test, handover test, and insulation preventive test of electrical equipment, an AC withstand voltage test is required. The AC withstand voltage test is the most direct and effective method to test the insulation strength of transformers, and it is very effective in detecting local defects in the main insulation of transformers, such as moisture ingress, cracking in the main insulation of windings, or winding loosening caused during transportation, insufficient lead distance, impurities and bubbles in the oil, and dirt attached to the winding insulation.

[0029] See Figure 1 , which shows a schematic structural diagram of a short-circuiting device for AC withstand voltage test provided by an embodiment of the present application, including a short-circuit wire 1, a first terminal clamp 21, and a second terminal clamp 22. Among them,

[0030] One end of the short-circuit wire 1 is fixedly connected to the first terminal clamp 21, and the other end of the short-circuit wire 1 is fixedly connected to the second terminal clamp 22;

[0031] In the above embodiment, the short-circuit wire 1 is the core connecting component of the present application, which is used to establish an electrical connection between two points that need to be short-circuited. One end of the short-circuit wire 1 is fixedly connected to the first terminal clamp 21, and the other end of the short-circuit wire 1 is fixedly connected to the second terminal clamp 22, that is, the short-circuit wire 1 conducts the first terminal clamp 21 and the second terminal clamp 22. The first terminal clamp 21 is used to clamp on the first electrical contact point that needs to be short-circuited, and the second terminal clamp 22 is used in cooperation with the first terminal clamp 21 to clamp on the second electrical contact point that needs to be short-circuited.

[0032] By setting the first terminal clamp 21 and the second terminal clamp 22, operators can quickly and conveniently establish an electrical connection between two electrical contact points that need to be short-circuited, without manually winding or welding wires. Just clamp the first terminal clamp 21 and the second terminal clamp 22 on the contact points, which greatly improves the test efficiency. The design of the first terminal clamp 21 and the second terminal clamp 22 makes the short-circuiting process more stable and reliable, reducing potential safety hazards caused by wire loosening or detachment, thus ensuring the safety and accuracy of the AC withstand voltage test.

[0033] The short-circuit wire 1 is a rigid structure.

[0034] In the above embodiment, the rigid structure refers to that the short-circuit wire 1 has high rigidity and anti-deformation ability in physical form. The rigid structure means that the short-circuit wire 1 is not easy to bend, twist or deform when subjected to external force, and can maintain its original shape and dimensional stability. Common rigid materials include metal materials, ceramic materials, hard plastics and composite materials, among which metal materials include stainless steel, carbon steel and aluminum alloy, etc., which generally have high strength and rigidity; ceramics have high hardness, high strength and good wear resistance, but are relatively brittle; hard plastics generally have high rigidity and strength, while maintaining light weight and good corrosion resistance; composite materials have superior properties that a single material does not have, but the cost is relatively high.

[0035] In a high-voltage or high-current test environment, the rigid structure of the short-circuit wire 1 is not easily deformed during the connection process, and can more effectively isolate and protect electrical components, preventing safety accidents caused by faults such as short circuits and leakage. In addition, the rigid structure also helps to reduce the risk of electric shock caused by shaking or falling off of the short-circuit wire 1, improving the safety of test personnel and equipment. At the same time, the rigid structure enables the short-circuit wire 1 to withstand greater mechanical stress and environmental factors, and is not easily damaged or failed, which helps to extend the service life of the short-circuit wire 1 and improve the durability and reliability of the entire test device.

[0036] Furthermore, the short-circuit wire 1 is connected between the first wiring clamp 21 and the second wiring clamp 22 in a fixed shape.

[0037] In the above embodiment, the short-circuit wire 1 is connected between the first wiring clip 21 and the second wiring clip 22 in a fixed shape, and this fixed shape is set during the manufacturing process of the short-circuit wire 1. The present application does not specifically limit this fixed shape, as long as it satisfies the conditions that the short-circuit wire 1 can simultaneously connect the first wiring clip 21 and the second wiring clip 22 without affecting other test steps. A straight line, an arc, or other shapes designed according to specific application scenarios can be selected to ensure that the short-circuit wire can stably connect the two wiring clips and adapt to specific electrical connection requirements.

[0038] The short-circuit wire 1 is connected between two terminal clamps in a fixed shape, which reduces deformation caused by external forces (such as wind, vibration, etc.) and reduces the probability of safety accidents such as electric shock or short circuit. In some application scenarios, the spatial layout of electrical equipment may be limited. The short-circuit wire 1 with a fixed shape can be customized according to actual needs to adapt to specific space requirements and optimize the overall layout of the electrical system.

[0039] Furthermore, the short-circuit wire 1 includes an outer skin and an inner core, the outer skin is made of a rigid hard material, and the inner core is made of copper.

[0040] In the above embodiment, the short wire 1 is composed of an inner core and an outer skin. The outer skin is sleeved on the inner core to wrap the inner core to form a wire structure. The inner core is made of a multi-strand copper wire with a wire diameter of 6 square millimeters. The material of the outer skin can be one of polyvinyl chloride, polyethylene, and cross-linked polyethylene. Specifically, it is rigid polyvinyl chloride in polyvinyl chloride, high-density polyethylene in polyethylene, and cross-linked polyethylene. These three materials are all rigid hard materials that are heat-resistant, corrosion-resistant, and not easily deformed.

[0041] Due to the excellent electrical conductivity and stability of copper, using a copper inner core can ensure the smooth and stable transmission of current, reducing heat and energy loss caused by excessive resistance. After comprehensive consideration among common rigid materials, rigid polyvinyl chloride, high-density polyethylene, and cross-linked polyethylene are selected as the outer skin to ensure that the shape of the short wire 1 remains fixed, reducing deformation caused by external forces and lowering the probability of safety accidents such as short circuits. The outer skin material also has good insulation, wear resistance, chemical corrosion resistance, and anti-aging properties, reducing the probability of electric shock for operators, resisting damage to the short wire 1 from the external environment, and extending the service life of the short wire 1.

[0042] Furthermore, the inner core of the short wire 1 is welded to the edges of the first terminal clamp 21 and the second terminal clamp 22.

[0043] In the above embodiment, the inner core of the short wire 1 is welded to the first terminal clamp 21 and the second terminal clamp 22. The welding position is at the edges of the first terminal clamp 21 and the second terminal clamp 22, that is, on the clamping arms of the first terminal clamp 21 and the second terminal clamp 22. Through welding, a firm electrical connection is formed between the short wire 1 and the first terminal clamp 21 and the second terminal clamp 22.

[0044] The welded connection between the inner core of the short wire 1 and the first terminal clamp 21 and the second terminal clamp 22 can ensure good metal contact between the inner core and the terminal clamp, reducing contact resistance and energy loss. Welding the short wire 1 at the edge of the terminal clamp ensures that the short wire 1 does not affect the operation of the terminal clamp by the operator due to its location and fixed shape.

[0045] Furthermore, both the first terminal clamp 21 and the second terminal clamp 22 are in a "concave" - shaped flat structure, and the materials of the first terminal clamp 21 and the second terminal clamp 22 are copper.

[0046] In the above embodiment, both the first terminal clamp 21 and the second terminal clamp 22 are in a "concave" - shaped flat copper structure, that is, the terminal clamp is a square copper sheet with a square groove in the center, forming clamping arms on both sides.

[0047] The "U"-shaped design of the terminal clamp provides stable clamping force, ensuring that the terminal clamp is not easily slipped off during the connection process, and is also convenient for installation and disassembly. The flat design helps to save space and is convenient for stacking or side-by-side installation.

[0048] Further, it is characterized in that clamping parts are provided on both the first terminal clamp 21 and the second terminal clamp 22.

[0049] In the above embodiment, a square copper sheet is provided at the bottom of the "U" shape of the first terminal clamp 21 and the second terminal clamp 22, which is the clamping part. The clamping part and the rest of the terminal clamp are cast by an integrated process. Some structures for enhancing friction, such as serrated edges, elastic clips, etc., can also be provided on the clamping part to ensure that the terminal clamp and the terminal rod can still maintain a stable connection when subjected to external forces.

[0050] The clamping part is a part specially designed on the terminal clamp for clamping itself. The clamping part provides a stable clamping foundation for the terminal clamp. The existence of the clamping part enables the terminal clamp to be fixed more effectively, improving the reliability and safety of the connection.

[0051] See Figure 2 , which shows a schematic structural diagram of the terminal rod provided by the embodiment of the present application. Further, it also includes a terminal rod, wherein the terminal rod includes a support rod 6, a telescopic mechanism, and a clamping mechanism 3. The support rod 6 is connected to the telescopic mechanism, the telescopic mechanism is connected to the clamping mechanism 3, and the clamping mechanism 3 is detachably connected to the clamping parts of the first terminal clamp 21 and the second terminal clamp 22.

[0052] In the above embodiment, the terminal rod is an auxiliary component of the terminal clamp and the short wire 1, and has three main structures: a support rod 6, a telescopic mechanism, and a clamping mechanism 3. The support rod 6 is the main part of the terminal rod and is a rod-shaped structure arranged at the bottom of the entire terminal rod; the telescopic mechanism is connected to the support rod 6 and is a rod-shaped structure with the function of telescopic length; the clamping mechanism 3 is arranged at the top of the telescopic mechanism and is an adjustable clamping element.

[0053] By setting the telescopic mechanism, the terminal rod can adjust its height according to actual needs, greatly improving the flexibility of use, so that the terminal rod can easily adapt to various complex electrical wiring environments. The stable support and flexible adjustment functions of the terminal rod make the test wiring work more efficient and convenient. The staff can complete the wiring task without frequently moving positions or adjusting the wiring height.

[0054] Further, a first control switch 7 is provided on the support rod 6, and the first control switch 7 is used to control the connection between the clamping mechanism 3 and the clamping part.

[0055] In the above embodiments, the first control switch 7 is provided on the support rod 6. The specific structure of the first control switch 7 is not limited, as long as it can control the clamping mechanism 3. A button, a switch, or a touch screen can be selected to achieve the control function. The clamping mechanism 3 is used for the clamping part of the terminal clamp. The specific structure of the clamping mechanism 3 is not limited, as long as it can clamp the terminal clamp and reach the specified position and then release it. It can be in various forms such as a mechanical claw, a suction cup, or a clip.

[0056] The operator can tightly clamp the terminal clamp with the test contact through the connection rod. After the connection is completed, the operator only needs to operate the first control switch 7 to realize the release control of the clamping mechanism 3, so that the connection rod is separated from the terminal clamp. The whole connection process between the terminal clamp and the test contact does not require direct contact with the terminal clamp, simplifies the operation process, and reduces the operation risk.

[0057] Furthermore, the telescopic mechanism includes a motor 5 and a telescopic rod 4. The support rod 6 is connected to the motor 5, the motor 5 is connected to the telescopic rod 4, and the telescopic rod 4 is connected to the clamping mechanism 3. The motor 5 is used to provide power to the telescopic rod 4.

[0058] In the above embodiments, both the motor 5 and the telescopic rod 4 are rod-shaped structures. The motor 5 is connected above the support rod 6, the telescopic rod 4 is connected above the motor 5, and the clamping mechanism 3 is connected to the top of the telescopic rod 4. The motor 5 converts electrical energy into kinetic energy to drive the telescopic rod 4, so that the telescopic rod 4 can be telescopically adjusted in height, and then drive the height of the clamping mechanism 3 to change.

[0059] The design of the telescopic rod 4 enables the entire connection rod to be adjusted in length as needed to adapt to the connection requirements at different height positions, enhancing the versatility and flexibility of the short-circuit device.

[0060] Furthermore, a second control switch 8 is also provided on the support rod 6. The second control switch 8 is used to control the motor to drive the telescopic mechanism to extend or shorten.

[0061] In the above embodiments, the second control switch 8 is also provided on the support rod 6, and is set at different heights on the same side of the support rod 6 as the first control switch 7. The specific structure of the second control switch 8 is not limited, as long as it can control the motor. A button, a switch, or a touch screen can be selected to achieve the control function.

[0062] The setting of the second control switch 8 enables the operator to directly perform height control operations on the support rod 6, greatly improving the operation convenience. The motor driving the telescopic mechanism to extend or shorten reduces the need for manual operation, enabling the operator to only stand under the test equipment and extend the connection rod to short-circuit the test equipment, thus improving the work efficiency and eliminating the risk of working at heights.

[0063] A short-circuit device for AC withstand voltage test provided by the present application includes a short-circuit wire 1, a first wiring clip 21 and a second wiring clip 22. One end of the short-circuit wire 1 is fixedly connected to the first wiring clip 21, and the other end of the short-circuit wire 1 is fixedly connected to the second wiring clip 22; the short-circuit wire 1 is of a rigid structure. The present application uses the rigid short-circuit wire 1 to connect with the first wiring clip 21 and the second wiring clip 22. Compared with the bare wire used in the traditional short-circuit wire, it avoids the safety hazards caused by the short-circuit wire swinging and contacting the test equipment due to external force factors, and significantly enhances the practicability and reliability of the short-circuit device. In addition, a telescopic wiring rod is also equipped, which not only improves the versatility of the device, but also reduces the risk of high-altitude operation and ensures the safety of on-site operation. The present application can be applied to the AC withstand voltage test of the winding of an electric transformer and a reactor together with the bushing, and short-circuit the winding of the electric transformer or the reactor together with the bushing to detect the insulation performance.

[0064] Those skilled in the art can understand that the drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the drawings are not necessarily essential for implementing the present application. Those skilled in the art can understand that the modules in the device in the implementation scenario can be distributed in the device in the implementation scenario according to the description of the implementation scenario, or can be correspondingly changed and located in one or more devices different from the present implementation scenario. The modules in the above implementation scenario can be combined into one module, or further split into multiple sub-modules.

[0065] The above serial numbers of the present application are only for description and do not represent the advantages or disadvantages of the implementation scenarios. The above disclosure is only several specific implementation scenarios of the present application. However, the present application is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A short-circuit device for AC withstand voltage test, characterized in that, It includes a jumper wire (1), a first terminal clamp (21) and a second terminal clamp (22). Among them, One end of the jumper wire (1) is fixedly connected to the first terminal clamp (21), and the other end of the jumper wire (1) is fixedly connected to the second terminal clamp (22); The jumper wire (1) is of a rigid structure.

2. The device according to claim 1, wherein The jumper wire (1) is connected between the first terminal clamp (21) and the second terminal clamp (22) in a fixed shape.

3. The device according to claim 1, characterized in that, The jumper wire (1) includes an outer skin and an inner core. The material of the outer skin is a rigid hard material, and the material of the inner core is copper.

4. The device according to claim 3, characterized in that The inner core of the jumper wire (1) is welded to the edges of the first terminal clamp (21) and the second terminal clamp (22).

5. The device according to claim 1, characterized in that, Both the first terminal clamp (21) and the second terminal clamp (22) are "concave"-shaped flat structures, and the materials of the first terminal clamp (21) and the second terminal clamp (22) are copper.

6. The device according to any one of claims 1 to 5, characterized in that, Both the first terminal clamp (21) and the second terminal clamp (22) are provided with clamping parts.

7. The device according to claim 6, characterized in that, It further includes a wiring rod. Among them, the wiring rod includes a support rod (6), a telescopic mechanism and a clamping mechanism (3). The support rod (6) is connected to the telescopic mechanism, the telescopic mechanism is connected to the clamping mechanism (3), and the clamping mechanism (3) is detachably connected to the clamping parts of the first terminal clamp (21) and the second terminal clamp (22).

8. The device according to claim 7, characterized in that, A first control switch (7) is provided on the support rod (6), and the first control switch (7) is used to control the connection between the clamping mechanism (3) and the clamping part.

9. The device according to claim 7, characterized in that, The telescopic mechanism includes a motor (5) and a telescopic rod (4). The support rod (6) is connected to the motor (5), the motor (5) is connected to the telescopic rod (4), the telescopic rod (4) is connected to the clamping mechanism (3), and the motor (5) is used to provide power to the telescopic rod (4).

10. The device according to claim 9, wherein A second control switch (8) is further provided on the support rod (6), and the second control switch (8) is used to control the motor to drive the telescopic mechanism to extend or shorten.

Images