High-voltage load resistor rack and load box

Abstract

The utility model provides a kind of high pressure load resistance shelf and load box.High pressure load resistance shelf includes resistance fixing device and the resistance module installed on resistance fixing device.Resistance module includes at least two groups of resistance branch and at least three groups of output terminal.At least two groups of resistance branch and at least three groups of output terminal are electrically connected, and at least two groups of resistance branch include multiple parallelly connected resistances.At least two groups of resistance branch are connected in series / parallel, to realize multi-grade resistance value output.Compared with prior art, the utility model can obtain multi-grade resistance value by the series connection or parallel connection combination between different resistance branch, and the output terminal outputs different resistance value, meets the test demand of high voltage power supply under different load conditions, and provides more comprehensive test result.

Description

Technical Field

[0001] This utility model relates to the field of high voltage power supply resistive load testing technology, and in particular to a high voltage load resistor frame and load box. Background Technology

[0002] High-voltage power supplies are core components in power transmission, medical equipment (such as X-ray machines and CT scanners), industrial testing (cable withstand voltage testing), and scientific research facilities (particle accelerators). Their performance verification relies on load devices simulating actual operating conditions. For example, a simulated load is applied using a high-voltage transformer or other large loads.

[0003] Traditional load simulation equipment often only provides a single resistance value, which cannot meet the testing requirements of high-voltage power supplies under different load conditions. If a high-voltage transformer is used, different models and specifications of high-voltage transformers are required when the required load capacity varies. This not only leads to high equipment purchase costs, but also requires frequent transformer replacements during actual testing to meet different test requirements, increasing operational complexity and testing time costs.

[0004] In view of this, it is indeed necessary to propose a high-voltage load resistor frame and load box to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage load resistor frame and load box that can output multiple resistance values.

[0006] Therefore, the present invention provides a high-voltage load resistor frame, including a resistor fixing device and a resistor module mounted on the resistor fixing device. The resistor module includes at least two sets of resistor branches and at least three sets of output terminals. The at least two sets of resistor branches and the at least three sets of output terminals are electrically connected. The at least two sets of resistor branches include multiple resistors connected in parallel. The at least two sets of resistor branches are connected in series / parallel to achieve multi-level resistance output.

[0007] Optionally, one of the two sets of resistor branches includes 10 resistors with the same resistance value, and the other set of resistor branches includes 4 resistors with the same resistance value.

[0008] Optionally, one of the two sets of resistor branches includes 10 resistors with the same resistance value, and the other set of resistor branches includes n resistors with a resistance value of nΩ, where n≥1.

[0009] Optionally, it also includes at least three sets of resistor branches and at least four sets of output terminals that are electrically connected. The three sets of resistor branches are a first resistor branch, a second resistor branch, and a third resistor branch. The first resistor branch includes 10 first resistors connected in parallel with the same resistance value. The second resistor branch includes 4 second resistors connected in parallel with the same resistance value. The third resistor branch includes 4 third resistors connected in parallel with the same resistance value. The resistance values ​​of the first resistor, the second resistor, and the third resistor are different.

[0010] Optionally, it includes 3 sets of first resistor branches, 4 sets of second resistor branches, 5 sets of third resistor branches, and 13 sets of output terminals. The first resistor branches, second resistor branches, and third resistor branches are connected in series with each other, and the 13 sets of output terminals are electrically connected to the resistor module.

[0011] Optionally, the resistor fixing device includes a resistor frame, which has several sets of mounting seats for fixing the two ends of the resistor. Limiting posts are fixed at both ends of the resistor. The mounting seats have open slots, and the limiting posts are installed in the open slots to fix the resistor.

[0012] Optionally, the shape of the opening groove matches that of the limiting post. The opening groove includes a bottom end and an opening end that are arranged opposite to each other. From the bottom end to the opening end, the cross-sectional area of ​​the opening groove gradually increases in the height direction. The ratio of the groove depth to the diameter of the limiting post is ≥2.

[0013] Optionally, the resistor frame is a multi-layer resistor frame arranged along the height direction, and the projected area increases from top to bottom in the projection direction perpendicular to the resistor frame, with the mounting base fixed at both ends of the resistor frame.

[0014] Therefore, this utility model also provides a load cell, comprising:

[0015] The enclosure contains an insulating liquid and is equipped with the aforementioned high-voltage load resistor frame, which is immersed in the insulating liquid.

[0016] The junction box is fixed to the top of the enclosure. One side of the junction box has several sets of resistor connectors that correspond one-to-one with the output terminals of the resistor module. The other side of the junction box has several sets of resistance taps that correspond one-to-one with the resistor connectors. The resistance taps are used to connect to the output terminals of the power supply under test.

[0017] Optionally, each set of resistance taps includes a first tap, a second tap, and a third tap arranged along the height direction. The second tap and the third tap are both used to connect to the output terminal of the power supply under test, and the inner diameter of the second tap is greater than or equal to the inner diameter of the third tap.

[0018] Compared with the prior art, the technical solution of the embodiments of this utility model has the following beneficial effects:

[0019] This utility model's resistor module includes at least two sets of resistor branches and at least three sets of output terminals. By combining different resistor branches in series or parallel, multiple resistance values ​​can be obtained, and the output terminals display different resistance values ​​to meet the testing requirements of high-voltage power supplies under various load conditions, providing more comprehensive test results. Each resistor branch consists of multiple resistors connected in parallel to form a branch, allowing for flexible adjustment of the number or value of resistors as needed. This facilitates users in quickly configuring the required resistance value according to different testing requirements, improving testing flexibility. Through the flexible series and parallel combination of multiple resistor branches, multiple resistance value outputs are achieved, allowing a single device to cover the full operating condition testing needs of high-voltage power supplies, avoiding the cost problem of traditional solutions requiring the customization of multiple high-voltage transformer devices. Attached Figure Description

[0020] Figure 1 This is a structural schematic diagram of the load cell conforming to a preferred embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A sectional view;

[0022] Figure 3 yes Figure 1 A structural diagram from another angle;

[0023] Figure 4 This is a schematic diagram of the assembly of the junction box and the high-voltage load resistor frame according to a preferred embodiment of the present utility model;

[0024] Figure 5 yes Figure 4 A structural diagram from another angle;

[0025] Figure 6 This is a schematic diagram of the high-voltage load resistor frame without wires, conforming to the preferred embodiment of this utility model;

[0026] Figure 7 yes Figure 6 A close-up view of the circled area;

[0027] Figure 8 This is a circuit diagram of a resistor module conforming to a preferred embodiment of the present utility model;

[0028] Figure 9 yes Figure 1 Schematic diagram of the intermediate junction box;

[0029] Figure 10 yes Figure 9 A schematic diagram of the junction box without its top cover.

[0030] The components in the attached diagram are labeled as follows:

[0031] Box 1, metal shell 11, insulation box 12, ventilation pipe 13, cooling pipe 14;

[0032] 2. Connector box, 21. Resistor connector, 22. Resistance tap, 22. First tap, 221. Second tap, 222. Third tap, 223. Partition, 23. Conductive plate, 24. Fixing plate, 241. Metal conductive component, 242.

[0033] High voltage load resistor frame 3, resistor fixing device 31, mounting base 311, base plate 3111, support plate 3112, opening slot 3113, fixing column 312, resistor module 32, output terminal 325, resistor 324, limiting column 3241, first resistor branch 321, second resistor branch 322, third resistor branch 323.

[0034] Load cell 100. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0037] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Please see Figures 1 to 10 As shown, an embodiment of this utility model provides a load box 100 for simulating various loads of a high-voltage power supply. The load box 100 includes a housing 1 and a connector box 2 fixed to the top of the housing 1. The load box 100 is connected to the output terminal of the high-voltage power supply to be tested via the connector box 2. The high-voltage power supply is not shown in the figure.

[0039] Please see Figures 1 to 3As shown, the enclosure 1 is an insulating box 12, and a high-voltage load resistor frame 3 is installed inside the insulating box 12. The insulating box 12 is made of insulating material, such as PP material. Furthermore, the insulating box 12 also contains an insulating liquid (not shown). In this embodiment, the insulating liquid is transformer oil. In other embodiments, the insulating liquid can also be mineral oil-based dielectric coolant, fluorinated liquid, or other equivalent substitutes with insulating and cooling functions. The resistor module 32 in the high-voltage load resistor frame 3 is immersed in the insulating liquid to ensure electrical safety and forms a double insulation barrier with the insulating box 12, effectively preventing safety accidents such as leakage during high-voltage power supply testing, and greatly improving the safety of testing operations.

[0040] When the resistor module 32 is working, it is submerged in insulating liquid. The insulating liquid serves two purposes: it insulates the resistor module 32 and it dissipates the heat generated during operation. To further improve heat dissipation efficiency, cooling pipes 14 can be installed on the inner wall of the insulation box 12, which can quickly absorb and dissipate heat to cool the resistor module 32.

[0041] In some preferred embodiments, a metal casing 11, such as a sheet metal casing, a stainless steel casing, or an aluminum alloy casing, is also provided outside the insulation box 12. This application does not limit the material of the metal casing 11. The insulation box 12 is housed within the metal casing 11 to increase the structural strength of the box 1, enabling it to withstand certain external impacts and pressures, and preventing damage during transportation and use.

[0042] The top of the enclosure 1 is also equipped with a vent, which is fitted with a flange. A vent pipe 13 is connected to the flange to balance the air pressure inside and outside the enclosure 1. When the insulating liquid vaporizes at high temperature to produce gas, the gas can be discharged from the vent pipe 13 in a timely manner, avoiding problems such as deformation or damage to the enclosure 1 or affecting the test results caused by excessive air pressure inside the enclosure.

[0043] Please see Figures 4 to 8 As shown, the high-voltage load resistor frame 3 is used to output loads with various resistance values, suitable for simulating different load conditions required by high-voltage power supplies under various complex working conditions, making the test more comprehensive and realistic. The high-voltage load resistor frame 3 includes a resistor fixing device 31 and a resistor module 32. The resistor fixing device 31 is fixed to the bottom surface of the insulating box 12 body 1, and the resistor module 32 is mounted on the resistor fixing device 31.

[0044] In some embodiments, the resistor module 32 includes at least two sets of resistor branches and at least three sets of output terminals 325. The at least two sets of resistor branches and the at least three sets of output terminals 325 are electrically connected. The at least two sets of resistor branches include multiple resistors 324 connected in parallel, and the at least two sets of resistor branches are connected in series. Different combinations can be used to output the resistance value of a single resistor branch and the sum of the resistance values ​​of multiple resistor branches, thereby achieving multiple resistance value outputs. For example, the resistor module 32 includes two resistor branches and three sets of output terminals 325, one of which is a starting output terminal. One of the other two output terminals 325 outputs the total resistance value of one resistor branch, and the other output terminal 325 outputs the sum of the total resistance values ​​of the two resistor branches.

[0045] Furthermore, one of the two sets of resistor branches includes 10 resistors 324 with the same resistance value, and the other set of resistor branches includes n resistors 324 with a resistance value of nΩ, where n≥1. By dividing the resistor module 32 into two groups, and with the number and resistance value of the resistors 324 in each group being clearly defined, when a resistor module 32 malfunctions, it is relatively easy to determine the branch where the faulty resistor 324 is located, thereby diagnosing and replacing the faulty resistor 324, reducing maintenance costs and difficulty.

[0046] In this embodiment, one set of the two resistor branches includes 10 resistors 324 with the same resistance value, and the other set includes 4 resistors 324 with the same resistance value. Setting up two sets of branches with 10 and 4 resistors 324 with the same resistance value respectively facilitates precise combinations with specific resistance values. For example, assuming each resistor 324 in one branch is 1Ω and each resistor 324 in the other branch is 5Ω, then by connecting different numbers of resistors 324 in series or parallel, numerous precise resistance values ​​such as 1Ω, 0.5Ω, 5Ω, 2.5Ω, 6Ω, and 3Ω can be obtained. This helps to simulate load resistance values ​​closer to actual application scenarios in testing, improving the accuracy and reliability of test results.

[0047] In some preferred embodiments, to provide a variety of output resistance values, the resistor module 32 may also include at least three electrically connected resistor branches and at least four output terminals 325. The three resistor branches are a first resistor branch 321, a second resistor branch 322, and a third resistor branch 323. The first resistor branch 321, the second resistor branch 322, and the third resistor branch 323 can be connected in series to provide a wider range of resistance value combinations. By selecting different output terminals 325, various resistance value options can be flexibly output, such as the resistance value of each individual resistor branch and the sum of the resistance values ​​of multiple branches, to meet the testing requirements of high-voltage power supplies under various load conditions. For example, the resistor module 32 includes three resistor branches and four output terminals 325, one of which is a starting output terminal. Of the other three output terminals 325, one output terminal 325 outputs the total resistance of one resistor branch, another output terminal 325 outputs the sum of the total resistance of two resistor branches, and the remaining output terminal 325 outputs the sum of the total resistance of three resistor branches.

[0048] Specifically, the first resistor branch 321 includes 10 parallel-connected first resistors 324 with the same resistance value. The second resistor branch 322 includes 4 parallel-connected second resistors 324 with the same resistance value. The third resistor branch 323 includes 4 parallel-connected third resistors 324 with the same resistance value. The resistance values ​​of the first, second, and third resistors 324 are different. Each resistor branch is composed of parallel-connected resistors 324 with different resistance values, and the resistance values ​​of the first, second, and third resistor branches 321, 322, and 323 are different. By adjusting the number of parallel resistors and combining them in series, ultra-fine resistance value adjustment can be achieved. For example, the first resistor branch 321 contains 10 identical parallel resistors 324, which can output a smaller resistance value and also meet specific resistance value requirements through partial parallel connection, effectively improving the flexibility and accuracy of testing.

[0049] In other embodiments, the first resistor branch 321, the second resistor branch 322, and the third resistor branch 323 may also be connected in parallel.

[0050] Please see Figure 8As shown, in this embodiment, the resistor module 32 includes three sets of first resistor branches 321, four sets of second resistor branches 322, five sets of third resistor branches 323, and thirteen sets of output terminals 325. The first resistor branches 321, second resistor branches 322, and third resistor branches 323 are connected in series. This series connection of multiple resistor branches helps to distribute the current and prevents a single resistor branch from being damaged by excessive current. Simultaneously, each resistor branch is composed of multiple parallel resistors 324, so even if one resistor 324 fails, the load capacity will not be completely lost, providing a stable and reliable load environment for high-voltage power supply testing and ensuring test continuity. The thirteen sets of output terminals 325 are electrically connected to the resistor branches in the resistor module 32. By combining multiple resistor branches in resistor module 32 with 13 output terminals 325, 12 combinations can be achieved, including single resistor branch resistance output, sum of two resistor branch resistance output, and sum of three resistor branch resistance output. This provides a wide range of precise resistance value selection for high-voltage power supply testing, meeting the needs of complex and varied load simulation.

[0051] The output resistance values ​​of the three first resistor branches 321 are 0.15MΩ, 0.5MΩ, and 1MΩ, respectively. The 0.15MΩ first resistor branch 321 obtains the first output resistance value by connecting n resistors 324 with the same resistance value in parallel, where n is a natural number and n≥1. For example, connecting ten 1.5MΩ resistors 324 in parallel results in a total resistance of 0.15MΩ, and the first output resistance value is 0.15MΩ. Using multiple resistors 324 in parallel can distribute the current, reduce the burden on individual resistors 324, and improve the reliability and stability of the resistor module 32.

[0052] The first resistor branch 321, with a resistance of 0.5MΩ, obtains the second output resistance by connecting n resistors 324 of the same value in parallel, where n is a natural number and n≥1. For example, connecting ten 5MΩ resistors 324 in parallel results in a total resistance of 0.5MΩ, and the second output resistance is 0.5MΩ. Alternatively, a 5MΩ resistor 324 can be obtained by connecting resistors 324 of different values ​​in series. For example, connecting 1.5MΩ and 3.5MΩ resistors 324 in series.

[0053] The first resistor branch 321, with a resistance of 1MΩ, obtains the third output resistance by connecting n resistors 324 of the same value in parallel, where n is a natural number and n≥1. For example, connecting ten 10MΩ resistors 324 in parallel results in a total resistance of 1MΩ, and the third output resistance is 1MΩ. Alternatively, a 10MΩ resistor 324 can be obtained by connecting resistors 324 of different values ​​in series. For example, connecting 1.5MΩ, 3.5MΩ, and 5MΩ resistors 324 in series.

[0054] The output resistance of each of the four sets of second resistor branches 322 is 1MΩ. Based on the 1MΩ first resistor branch 321, one, two, three, and four second resistor branches 322 are connected in series respectively to obtain a fourth output resistance of 2MΩ, a fifth output resistance of 3MΩ, a sixth output resistance of 4MΩ, and a seventh output resistance of 5MΩ. By changing the number of second resistor branches 322 connected in series, different output resistance values ​​can be easily achieved. This flexible resistance adjustment method allows the resistor module 32 to quickly adapt to various testing requirements, switching to the desired resistance value without complex operations.

[0055] In some embodiments, the second resistor branch 322 is composed of n resistors 324 connected in parallel with a resistance value of nMΩ, where n is a natural number and n≥1.

[0056] In this embodiment, the second resistor branch 322 is formed by four 4MΩ second resistors 324 connected in parallel.

[0057] The output resistance of each of the five sets of third resistor branches 323 is 5MΩ. Based on the 5MΩ third resistor branch 323, one, two, three, four, and five third resistor branches 323 are connected in series respectively to obtain the eighth output resistance of 10MΩ, the ninth output resistance of 15MΩ, the tenth output resistance of 20MΩ, the eleventh output resistance of 25MΩ, and the twelfth output resistance of 30MΩ. By changing the number of third resistor branches 323 connected in series, different resistance values ​​can be easily achieved. This flexible resistance adjustment method allows the resistor module 32 to quickly adapt to various testing needs, switching to the desired resistance value without complex operations.

[0058] In some embodiments, the third resistor branch 323 is composed of n resistors 324 with a resistance of 5nMΩ connected in parallel, where n is a natural number and n≥1.

[0059] In this embodiment, the third resistor branch 323 is formed by four 20MΩ third resistors 324 connected in parallel.

[0060] Please see Figures 6 to 7 As shown, in this embodiment, the resistor fixing device 31 includes a resistor frame, on which several sets of mounting seats 311 for fixing the two ends of the resistor 324 are provided. Each mounting seat 311 includes a base plate 3111 and a support plate 3112. The base plate 3111 is fixed to the resistor 324 frame by screws. The mounting seat 311 has an L-shaped structure, with the base plate 3111 and the support plate 3112 perpendicular to each other. The support plate 3112 has an opening slot 3113. The design of the opening slot 3113 can accommodate limiting posts 3241 of different sizes and shapes, eliminating the need to replace the fixing device and providing strong versatility.

[0061] Limiting posts 3241 are fixed at both ends of resistor 324. The limiting posts 3241 are installed in the opening slot 3113 to fix resistor 324.

[0062] For ease of installation, the opening groove 3113 is shaped to match the limiting post 3241. The opening groove 3113 includes a bottom end and an opening end positioned opposite each other. From the bottom end to the opening end, the cross-sectional area of ​​the opening groove 3113 gradually increases in the height direction. This allows the limiting post 3241 to be easily aligned and inserted into the opening groove 3113 during installation, and also facilitates the removal of the limiting post 3241 from the opening groove 3113 when disassembly is required, improving the maintenance and replacement efficiency of the resistor 324. Furthermore, the ratio of the groove depth of the opening groove 3113 to the diameter of the limiting post 3241 is ≥2. This design makes the limiting post 3241 more securely installed and less likely to detach from the opening groove 3113. The end of the limiting post 3241 facing away from the resistor 324 is further reinforced with screws, enhancing the fixing effect of the resistor 324 and ensuring that the resistor 324 maintains a reliable connection even during long-term use or in vibration environments.

[0063] In this embodiment, the resistor frame is a multi-layered resistor 324 frame arranged along the height direction, and the projected area increases from top to bottom in the projection direction perpendicular to the resistor 324 frame, so as to increase the installation stability of the resistor frame.

[0064] Specifically, the resistor frame has a 5-layer pyramid structure, with 10, 12, 14, 14, and 16 resistors installed sequentially on each layer. The first to fifth layers of resistor frames are fixedly connected by vertically installed fixing columns 312. The top of each fixing column 312 has a lifting ring (not shown) for easy hoisting and movement. Mounting bases 311 are fixed to both ends of each layer of resistor frames.

[0065] Please see Figures 9 to 10 As shown, one side of the connector box 2 is provided with several sets of resistor connectors 21 that are connected one-to-one with the output terminals of the resistor module 32, and the other side of the connector box 2 is provided with several sets of resistance taps 22 that are connected one-to-one with the resistor connectors 21. The resistance taps 22 are used to connect to the output terminals of the power supply under test.

[0066] In this embodiment, there are 13 sets of resistor connectors 21. The input terminals of the 13 sets of resistor connectors 21 are respectively connected to the corresponding output terminals 325 via wires. The output terminals of the 13 sets of resistor connectors 21 are respectively connected to the corresponding resistance taps 22. The leftmost resistance tap 22 of the connector box 2 is the starting tap. The resistance values ​​marked on the other taps are the resistance values ​​between the starting tap and the other tap. One end of the output terminal of the high-voltage power supply is connected to the starting tap, and the other end is connected to one of the remaining resistance taps. That is, the connector box 2 provides 12 different resistance taps 22 for the high-voltage power supply to be tested to select different loads, which facilitates quick switching of loads with different resistance values. The operator only needs to select the corresponding output terminal 325 to connect according to the test requirements to easily obtain the required load resistance value without reassembling the resistor 324 frame, which greatly improves the test efficiency and saves time and labor costs. The design of the connector box 2 allows the operator to easily obtain the required load resistance value simply by selecting the corresponding output terminal 325 to connect. This convenient connection method simplifies the testing process and reduces the difficulty of operation.

[0067] In some preferred embodiments, if the 12 output resistance values ​​on the 13 resistance taps 22 cannot meet the testing requirements, the load resistance can be flexibly adjusted within multiple resistance ranges up to 30MΩ by inserting a "high-voltage jumper wire". For example, when a load resistance of 9MΩ is required, and there is no corresponding resistance value on the 13 resistance taps 22, the "1MΩ resistance tap group 22" and the "2MΩ resistance tap group 22" can be connected with a "high-voltage jumper wire". At this time, the resistance between the "10MΩ tap group" and the starting resistance tap 22 is adjusted to 9MΩ. This setting achieves more resistance values ​​without increasing hardware investment.

[0068] Each set of resistance taps 22 includes three taps arranged along the height direction: tap 221, tap 222, and tap 223. Tap 221 is used to connect to a high-voltage divider to test the output voltage value of the power supply, ensuring accurate monitoring of the power output during testing. Tap 223 is used to connect to the high-voltage power supply under test and is suitable for conventional high-voltage line connections.

[0069] The second tap 222 is a spare tap and is also used to connect to the output terminal of the high-voltage power supply under test. The inner diameter of the interface of the second tap 222 is greater than or equal to the inner diameter of the interface of the third tap 223. In some embodiments, the inner diameter of the interface of the second tap 222 is equal to the inner diameter of the interface of the third tap 223. When the third tap 223 is damaged, the second tap 222 can be used to connect to the power supply under test.

[0070] In some preferred embodiments, the inner diameter of the second tap 222 is larger than that of the third tap 223. If the high-voltage output cable used by the customer is very thick, the second tap 222 can be used to connect to the output terminal of the high-voltage power supply to be tested. For example, if the inner diameter of the inner tube of the second tap 222 is 22mm, such as a 22mm Teflon tube, then the second tap 222 supports connecting high-voltage cables with an outer diameter ≤22mm, and can support high-voltage cables up to 22mm in diameter, thus expanding the compatibility range of the equipment and adapting to the high-voltage cable specifications used by different customers.

[0071] The junction box 2 is detachably fitted with a top cover for sealing the box body, ensuring airtightness and facilitating subsequent maintenance. Inside the junction box 2, there are two spaced-apart partitions 23. These partitions 23 form a receiving space. Conductive components are housed within this space, which is sealed with adhesive (not shown) to achieve overall insulation. This design effectively prevents arcing or short circuits between the internal conductive components, improving the safety and reliability of the junction box 2 under high-voltage conditions. By housing the conductive components within the receiving space, insulation requirements are met only by insulating and sealing the receiving space, eliminating the need for complex insulation treatment of the entire junction box 2 and significantly reducing production costs. A resistance connector 21 is connected to one end of the conductive component via a wire, and a resistance tap 22 is connected to the other end of the conductive component via a wire. The conductive component includes 13 sets of conductive plates 24. Each conductive plate 24 includes a fixing plate 241 and metal conductive parts 242 mounted on the fixing plate 241. A metal conductive element 242 is provided on the side of the fixing plate 241 facing the resistor 324 tap, and the resistor 324 tap is connected to the metal conductive element 242 via a wire. In this embodiment, the metal conductive element 242 is a copper sheet. Three metal conductive elements 242 are provided on the side of the fixing plate 241 facing the resistance tap 22, and the three metal conductive elements 242 are electrically connected to each other via wires. The first tap 221, the second tap 222, and the third tap 223 are respectively connected to the three metal conductive elements 242 via wires.

[0072] In summary, the resistor module 32 of this invention includes at least two sets of resistor branches and at least three sets of output terminals. By combining different resistor branches in series or parallel, multiple resistance values ​​can be obtained, enabling the output terminals to output different resistance values ​​to meet the testing requirements of high-voltage power supplies under different load conditions and provide more comprehensive test results. Each set of resistor branches consists of multiple resistors 324 connected in parallel, and the resistance value can be flexibly adjusted as needed, allowing users to quickly configure the required resistance value according to different test requirements and improving testing flexibility. Through the flexible series and parallel combination of multiple resistor branches, multiple resistance value outputs are achieved, allowing a single device to cover the full operating condition testing needs of high-voltage power supplies, avoiding the cost problem of traditional solutions requiring the customization of multiple high-voltage transformer devices.

[0073] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A high-voltage load resistor frame, characterized in that, include: A resistor fixing device and a resistor module installed on the resistor fixing device, the resistor module including at least two sets of resistor branches and at least three sets of output terminals, the at least two sets of resistor branches and the at least three sets of output terminals being electrically connected, the at least two sets of resistor branches including multiple resistors connected in parallel, and the at least two sets of resistor branches being connected in series / parallel to achieve multi-level resistance output.

2. The high-voltage load resistor frame according to claim 1, characterized in that, One of the two sets of resistor branches includes 10 resistors with the same resistance value, and the other set of resistor branches includes 4 resistors with the same resistance value.

3. The high-voltage load resistor frame according to claim 1, characterized in that, One of the two sets of resistor branches includes 10 resistors with the same resistance value, and the other set of resistor branches includes n resistors with a resistance value of nΩ, where n≥1.

4. The high-voltage load resistor frame according to claim 1, characterized in that, It also includes at least three sets of resistor branches and at least four sets of output terminals that are electrically connected. The three sets of resistor branches are a first resistor branch, a second resistor branch and a third resistor branch. The first resistor branch includes 10 first resistors connected in parallel with the same resistance value. The second resistor branch includes 4 second resistors connected in parallel with the same resistance value. The third resistor branch includes 4 third resistors connected in parallel with the same resistance value. The resistance values ​​of the first resistor, the second resistor and the third resistor are different.

5. The high-voltage load resistor frame according to claim 4, characterized in that, It includes 3 sets of first resistor branches, 4 sets of second resistor branches, 5 sets of third resistor branches, and 13 sets of output terminals. The first resistor branches, second resistor branches, and third resistor branches are connected in series with each other, and the 13 sets of output terminals are electrically connected to the resistor module.

6. The high-voltage load resistor frame according to claim 1, characterized in that, The resistor fixing device includes a resistor frame, which is provided with several sets of mounting seats for fixing the two ends of the resistor. Limiting posts are fixed at both ends of the resistor. The mounting seats are provided with open slots, and the limiting posts are installed in the open slots to fix the resistor.

7. The high-voltage load resistor frame according to claim 6, characterized in that, The opening groove matches the shape of the limiting post. The opening groove includes a bottom end and an opening end that are disposed opposite to each other. From the bottom end to the opening end, the cross-sectional area of ​​the opening groove gradually increases in the height direction. The ratio of the groove depth to the diameter of the limiting post is ≥2.

8. The high-voltage load resistor frame according to claim 6, characterized in that, The resistor frame is a multi-layer resistor frame arranged along the height direction, and the projected area increases from top to bottom in the projection direction perpendicular to the resistor frame. The mounting base is fixed at both ends of the resistor frame.

9. A load cell, characterized in that, include: The enclosure contains an insulating liquid and is equipped with a high-voltage load resistor frame as described in any one of claims 1 to 8, wherein the high-voltage load resistor frame is immersed in the insulating liquid; A junction box is fixed to the top of the housing. One side of the junction box is provided with several sets of resistor connectors that are connected one-to-one with the output terminals of the resistor module. The other side of the junction box is provided with several sets of resistance taps that are connected one-to-one with the resistor connectors. The resistance taps are used to connect to the output terminals of the power supply under test.

10. The load cell according to claim 9, characterized in that, Each set of resistance taps includes a first tap, a second tap, and a third tap arranged along the height direction. The second tap and the third tap are both used to connect to the output terminal of the power supply under test. The inner diameter of the interface of the second tap is greater than or equal to the inner diameter of the interface of the third tap.

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