Insulation and dielectric loss test switching device, test system and test method

Abstract

The application relates to an insulation and dielectric loss test switching device, a test system and a test method. The insulation and dielectric loss test switching device comprises a shell, a static contact, a conductive part, a limiting assembly and a reset part. The static contact is used for grounding. The conductive part has a connecting part and is in sliding connection with the shell and can be moved to a first position and a second position. The limiting assembly is used for limiting the movement of the conductive part relative to the shell when the conductive part is in the second position. The reset part is used for driving the conductive part to move from the second position to the first position when the limiting assembly removes the limitation of the conductive part. The structure to be measured is electrically connected with the conductive part. When the conductive part is located at the first position, the conductive part is separated from the static contact. The connecting part is used for electrically connecting an insulation resistance detector to detect the insulation resistance. When the conductive part is located at the second position, the conductive part is electrically connected with the static contact. The connecting part is used for electrically connecting a dielectric loss detector to detect the dielectric loss factor. Therefore, different equipment can be quickly switched to complete corresponding detection.

Description

Technical Field

[0001] This application relates to the field of power equipment testing technology, and in particular to an insulation and dielectric loss testing switching device, testing system and testing method. Background Technology

[0002] Power transmission networks deliver electricity to users through the interconnection of numerous electrical devices. The reliability of the transmission network is determined by the operational stability of each device. Various electrical devices operate under conditions of high voltage, high current, mechanical vibration, and varying weather conditions. For example, high-voltage bushings in power transformers are prone to damage due to prolonged moisture exposure, oil deterioration, or mechanical failure. Damage to high-voltage bushings can lead to grid malfunctions and, in severe cases, even fires and explosions.

[0003] In related technologies, it is typically necessary to periodically inspect and maintain equipment prone to damage, such as the aforementioned high-voltage bushings. In existing technologies, detecting the dielectric loss factor and insulation resistance of high-voltage bushings helps maintenance personnel understand their usage status and determine if they are damaged. Grounding is required when testing the dielectric loss factor, but grounding will cause the testing equipment to fail when testing insulation resistance parameters. Therefore, the high-voltage bushing cannot be grounded when testing insulation resistance. Consequently, operators need to use both a dielectric loss meter and an insulation resistance meter with different wiring methods to test the high-voltage bushing and obtain the parameters.

[0004] In practice, operators need to move to a high position to connect the dielectric loss test leads to both ends of the structure under test to detect the dielectric loss factor. After the test is completed, the operator needs to replace the dielectric loss detector with an insulation resistance detector and rewire the device. During this process, the operator needs to remain at a high position for an extended period or move to the ground and wait for the measurement to be completed before carrying the insulation resistance detector back to a high position for installation. If the operator remains at a high position for an extended period, it will increase the safety risk. Repeatedly carrying the testing equipment to high positions will significantly increase the workload and, to some extent, increase the safety risk. Summary of the Invention

[0005] Therefore, it is necessary to provide an insulation and dielectric loss test switching device, test system and test method to address the problems of cumbersome operation and poor safety of replacing the above-mentioned dielectric loss tester and insulation resistance tester.

[0006] On the one hand, this application provides a switching device for insulation and dielectric loss testing, which includes:

[0007] case;

[0008] A stationary contact is fixedly connected to the inner wall of the housing and is used for grounding;

[0009] A conductive component has a connecting portion. The conductive component is disposed inside the housing and slidably connected to the housing, allowing the conductive component to move to a first position and a second position. When the conductive component is in the first position, it is separated from the stationary contact, and the connecting portion is used for electrical connection to an insulation resistance detector for insulation resistance detection. When the conductive component is in the second position, it is in electrical contact with the stationary contact, and the connecting portion is used for electrical connection to a dielectric loss detector for dielectric loss detection.

[0010] A limiting component, connected to the housing, is used to restrict the movement of the conductive element relative to the housing when the conductive element is in the second position;

[0011] A reset member, connected to the housing, is used to drive the conductive member to reset from the second position to the first position when the limiting component releases the movement restriction of the conductive member relative to the housing.

[0012] In some embodiments, the conductive element includes a conductive rod and a guide block. The guide block is disposed on the outer side wall of the conductive rod, and the conductive rod is disposed inside the housing. A guide groove is formed on the inner wall of the housing, and the guide block is engaged in the guide groove. The conductive rod can move along the length direction of the guide groove with the guide block.

[0013] In some embodiments, the conductive element further includes an abutment block disposed on the outer side wall of the conductive rod, and the reset element is connected to the abutment block. The reset element is used to drive the abutment block to move the conductive rod to the first position.

[0014] In some embodiments, the reset member includes a first reset spring, one end of which abuts against the housing and the other end of which abuts against the conductive element.

[0015] In some embodiments, the limiting component includes a limiting rod that passes through the side wall of the housing and is slidably connected to the housing. The conductive element has a limiting hole, and the limiting rod is inserted into the limiting hole to restrict the movement of the conductive element relative to the housing.

[0016] In some embodiments, the limiting assembly further includes a second return spring, one end of which is connected to the outer wall of the housing, and the other end of which is connected to the limiting rod.

[0017] In some embodiments, the housing includes an outer shell and a baffle, with the conductive element and the baffle both disposed inside the outer shell, the conductive element penetrating the baffle and slidably connected to the baffle.

[0018] In some embodiments, the housing further includes a protective cover, and a mounting opening is provided on one side of the housing, with the protective cover covering the mounting opening.

[0019] On the other hand, this application provides a testing system including an insulation resistance detector, a dielectric loss detector, and an insulation and dielectric loss test switching device as described above. The conductive element is electrically connected to the structure under test. When the conductive element is in the first position, the insulation resistance detector is electrically connected to the connection part, and the insulation resistance detector is connected in series with the structure under test. When the conductive element is in the second position, one detection terminal of the dielectric loss detector is electrically connected to the connection part, and the other detection terminal of the dielectric loss detector is connected to the structure under test to form a detection loop.

[0020] A testing method based on the above-described testing system includes the following steps:

[0021] Move the conductive element to the second position, adjust the limiting component so that the limiting component restricts the conductive element to the second position, connect the dielectric loss detector to the connecting part so that the dielectric loss detector and the structure under test form a detection loop to detect the dielectric loss factor of the structure under test.

[0022] Release the limiting component from the conductive element, so that the reset component drives the conductive element to move to the first position, connect the insulation resistance detector to the connection part, so that the insulation resistance detector is connected in series with the structure under test, so as to detect the insulation resistance parameter of the structure under test.

[0023] The aforementioned insulation and dielectric loss test switching device, test system, and test method include an insulation and dielectric loss test switching device comprising a housing, a conductive element, and a stationary contact. The conductive element can slide within the housing, thereby switching to a first position or a second position. When the conductive element is in the first position, it is not in contact with the stationary contact and is not grounded. The detection terminal of an insulation resistance detector can be connected to the connection part to detect the insulation resistance parameters of the structure under test. When the conductive element is in the second position, it is in contact with the stationary contact, grounding the conductive element. The detection terminal of a dielectric loss detector can be connected to the connection part to detect the dielectric loss factor of the structure under test. A limiting component is used to restrict the conductive element to the second position. When the limiting component releases the restriction on the conductive element, a reset component can drive the conductive element to move to the first position, thereby fixing the conductive element in a designated position. Specifically, the operator moves to a higher position and connects both the dielectric loss detector and the insulation resistance detector to the structure under test, and electrically connects the conductive component to the structure under test. This insulation and dielectric loss test switching device can be set up on the ground. After installation, the operator returns to the ground and connects the dielectric loss detector and the insulation resistance detector to the conductive component respectively to complete the detection of dielectric loss factor and insulation resistance. The operator only needs to change the connection and switch the conductive component to the designated position to complete the detection of the two parameters. The switching operation is simple and convenient, without the need to climb to a height to change equipment multiple times or stay at a height for a long time, and the safety is high. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an insulation and dielectric loss test switching device according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the internal structure of the housing in an insulation and dielectric loss testing switching device according to an embodiment of this application.

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0027] Figure 4 This is a schematic diagram of the protective cover in the open state of an insulation and dielectric loss test switching device according to an embodiment of this application.

[0028] In the figure, 100 is the housing; 110 is the stationary contact; 120 is the outer shell; 121 is the mounting port; 130 is the baffle; 140 is the protective cover; 200 is the conductive component; 210 is the connecting part; 220 is the conductive rod; 230 is the guide block; 240 is the abutment block; 250 is the limiting hole; 300 is the limiting assembly; 310 is the limiting rod; 311 is the abutment part; 320 is the second return spring; 400 is the reset component; and 410 is the first return spring. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] See Figure 1 and Figure 2 , Figure 1 A schematic diagram of the insulation and dielectric loss testing switching device in one embodiment of this application is shown. Figure 2 This diagram illustrates the internal structure of the housing in an insulation and dielectric loss testing switching device according to an embodiment of this application. An embodiment of this application provides an insulation and dielectric loss testing switching device, which includes a housing 100, a stationary contact 110, a conductive element 200, a limiting assembly 300, and a reset element 400. The stationary contact 110 is fixedly connected to the inner wall of the housing 100 and is used for grounding. The conductive element 200 has a connecting portion 210. The conductive element 200 is disposed inside the housing 100 and slidably connected to the housing 100, allowing the conductive element 200 to move to a first position and a second position. When the conductive element 200 is in the first position, it is separated from the stationary contact 110, and the connecting portion 210 is used for electrical connection to an insulation resistance detector for insulation resistance testing. When the conductive element 200 is in the second position, it is electrically connected to the stationary contact 110, and the connecting portion 210 is used for electrical connection to a dielectric loss detector for dielectric loss testing. The limiting component 300 is connected to the housing 100 and is used to restrict the movement of the conductive member 200 relative to the housing 100 when the conductive member 200 is in the second position. The resetting component 400 is connected to the housing 100 and is used to drive the conductive member 200 to reset from the second position to the first position when the limiting component 300 releases the movement restriction of the conductive member 200 relative to the housing 100.

[0036] likeFigure 2 As shown, the stationary contact 110 is located at one end of the housing 100. The conductive element 200 is used for electrical connection with the structure under test (such as a high-voltage bushing), that is, the conductive element 200 is connected to the structure under test. The conductive element 200 can move inside the housing 100. The conductive element 200 can move to a first position and a second position. When the conductive element 200 is in the first position, it is not in contact with the stationary contact 110. At this time, the structure under test is not grounded, so the insulation resistance parameter of the structure under test can be detected by an insulation resistance tester. When the conductive element 200 is in the second position, the structure under test is grounded through the conductive element 200 and the stationary contact 110. At this time, the dielectric loss factor of the structure under test can be detected by a dielectric loss tester. The reset component 400 can use a spring, magnet, motor or other structure to drive the conductive component 200 to move to the first position. The limiting component 300 can limit the conductive component 200 to the second position. In use, the operator can move the conductive component 200 to the second position manually or electrically and limit the conductive component 200 to the second position by the limiting component 300. Releasing the limitation of the limiting component 300 on the conductive component 200 will allow the conductive component 200 to return to the first position under the action of the reset component 400.

[0037] When using it, the operator connects the insulation resistance tester and the dielectric loss tester to the structure to be tested, such as a high place or a narrow place where the high voltage bushing is located, and electrically connects the structure to be tested to the conductive part 200. This insulation and dielectric loss test switching device is placed in an easily accessible location (such as on the ground). The operator operates the device from a safe position. Specifically, the operator moves the conductive element 200 to the second position and fixes it with the limiting component 300. The dielectric loss detector is then connected to the connection part 210. At this time, the dielectric loss detector and the structure under test form a detection circuit. Both the dielectric loss detector and the structure under test are grounded through the connection with the stationary contact 110, thereby allowing the dielectric loss factor of the structure under test to be measured. The connection between the dielectric loss detector and the connection part 210 is then disconnected, and the limiting component 300 is released from its restriction on the conductive element 200. The conductive element 200 returns to the first position under the action of the reset component 400. The insulation resistance detector is then connected to the connection part 210. At this time, the structure under test and the insulation resistance detector are not grounded, thereby allowing the insulation resistance of the structure under test to be measured.

[0038] It should be noted that dielectric loss detectors and insulation resistance detectors typically have two detection terminals. By connecting the two detection terminals to the structure under test to form a detection loop, the relevant parameters of the structure under test can be detected. Since both dielectric loss detectors and insulation resistance detectors can achieve detection functions through various connection methods, they will not be listed here. Operators can adjust the connection method according to the actual situation, as long as it is ensured that both the dielectric loss detector and the insulation resistance detector can form a detection loop with the structure under test.

[0039] With the above-described setup, operators can replace the dielectric loss detector and insulation resistance detector from a relatively safe location, such as the ground, without needing to stay at a high position or make multiple trips to a higher position. The replacement process is simple, easy to operate, and highly safe. Furthermore, conductive components such as the conductive element 200 and the stationary contact 110 are all housed within the housing 100, and the position switching operation of the conductive element 200 is completed inside the housing 100, effectively preventing electric shock to operators and improving operational safety.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments, the conductive element 200 includes a conductive rod 220 and a guide block 230. The guide block 230 is disposed on the outer side wall of the conductive rod 220, and the conductive rod 220 is disposed inside the housing 100. A guide groove (not shown in the figure) is formed on the inner wall of the housing 100, and the guide block 230 is engaged in the guide groove, allowing the conductive rod 220 to move along the length direction of the guide groove with the guide block 230.

[0041] The guide block 230 can slide along the guide groove to drive the conductive rod 220 to move inside the housing 100, thereby enabling the conductive rod 220 to move to the first position and the second position. In some preferred embodiments, the connecting part 210 is provided on the conductive rod 220, and one end of the conductive rod 220 is used to contact the stationary contact 110. With the above arrangement, the direction of movement of the conductive rod 220 can be restricted, avoiding deviation during the movement of the conductive rod 220, and ensuring that the conductive rod 220 can move to the first position and the second position.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, the conductive member 200 further includes an abutment block 240, which is disposed on the outer side wall of the conductive rod 220. The reset member 400 is connected to the abutment block 240 and is used to drive the abutment block 240 to move the conductive rod 220 to a first position.

[0043] In some preferred embodiments, the reset member 400 is a spring, and the abutment block 240 is disposed on the side wall of the conductive rod 220. The end of the spring abuts against the abutment block 240, thereby pushing the abutment block 240 and the conductive rod 220 to move. The reset member 400 can also be a motor, which is connected to the abutment block 240, thereby driving the conductive rod 220 to move by driving the abutment block 240. With the above arrangement, it is convenient to connect the reset member 400 and the conductive member 200, improving the connection stability between the reset member 400 and the conductive member 200, so that the reset member 400 can stably drive the conductive rod 220.

[0044] like Figure 1 and Figure 2As shown, in some embodiments, the reset member 400 includes a first reset spring 410, one end of which abuts against the housing 100 and the other end of which abuts against the conductive member 200.

[0045] The length direction of the first return spring 410 is the same as the moving direction of the conductive element 200, so that the first return spring 410 can be compressed during the process of the conductive element 200 moving from the first position to the second position. After the limiting component 300 releases the restriction on the conductive element 200, the first return spring 410 can push the conductive element 200 back to the first position. With the above configuration, the conductive element 200 can return from the second position to the first position, and the structure is simple and easy to inspect and maintain.

[0046] Furthermore, the first reset spring 410 is sleeved on the outer periphery of the conductive rod 220 and abuts against the abutment block 240, so that the various structures are arranged reasonably and the space occupied is reduced.

[0047] See Figure 3 In some embodiments, the limiting component 300 includes a limiting rod 310 that passes through the side wall of the housing 100 and is slidably connected to the housing 100. The conductive element 200 has a limiting hole 250, and the limiting rod 310 is inserted into the limiting hole 250 to limit the movement of the conductive element 200 relative to the housing 100.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, a mounting hole (not shown) is provided on the outer wall of the housing 100. A limiting rod 310 is inserted into the mounting hole, allowing it to pass through the outer wall of the housing 100. The limiting rod 310 moves along the depth direction of the mounting hole to approach or move away from the conductive component 200 located inside the housing 100. The moving direction of the limiting rod 310 is perpendicular to the moving direction of the conductive component 200. The position of the limiting hole 250 corresponds to the limiting rod 310, and the depth direction of the limiting hole 250 is perpendicular to the moving direction of the conductive component 200. When the conductive component 200 is in the second position, the limiting rod 310 can be inserted into the limiting hole 250 to restrict the movement of the conductive component 200. With the above settings, the limiting rod 310 can be adjusted to quickly limit or release the conductive component 200, making the operation simple and quick.

[0049] See Figure 3 In some embodiments, the limiting component 300 further includes a second return spring 320, one end of which is connected to the outer wall of the housing 100, and the other end is connected to the limiting rod 310.

[0050] like Figure 1 , Figure 2 and Figure 3As shown, the end of the limiting rod 310 away from the conductive member 200 (i.e., the end located outside the housing 100) has an abutment portion 311. The second return spring 320 is disposed between the abutment portion 311 and the housing 100. One end of the second return spring 320 is connected to the housing 100, and the other end is connected to the abutment portion 311. When the limiting rod 310 is inserted into the limiting hole 250, the second return spring 320 is at its free length. When the limiting component 300 releases the restriction on the conductive element 200, the limiting rod 310 moves away from the conductive element 200, thereby stretching the second return spring 320. It is easy to understand that when the conductive element 200 has not moved to the second position, the limiting rod 310 cannot be inserted into the limiting hole 250, causing the limiting rod 310 to abut against the side wall of the conductive element 200 (i.e., the side wall of the conductive rod 220), and the second return spring 320 is in a stretched state. When the conductive element 200 moves to the second position, the second return spring 320 pulls the limiting rod 310 to insert into the limiting hole 250, thus limiting the conductive element 200. With the above setup, no manual operation is required. When the conductive element 200 moves to the second position, the limiting rod 310 can quickly insert into the limiting hole 250 to complete the limiting, thus quickly limiting the conductive element 200.

[0051] like Figure 1 and Figure 2 As shown, in some embodiments, the housing 100 includes an outer shell 120 and a baffle 130. The conductive element 200 and the baffle 130 are both disposed inside the outer shell 120. The conductive element 200 passes through the baffle 130 and is slidably connected to the baffle 130.

[0052] A baffle 130 is located in the middle of the housing 120. The plane of the baffle is perpendicular to the moving direction of the conductive element 200. The conductive element 200 passes through the baffle 130 and is slidably connected to the baffle 130, allowing the conductive element 200 to move inside the housing 120. With this configuration, the conductive element 200 only needs to slide and connect with the baffle 130 to move, without contacting the inner wall of the housing 120. This allows a cavity to be formed inside the housing 120, facilitating the placement of structures such as the limiting component 300 and the reset component 400.

[0053] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the housing 100 further includes a protective cover 140, and an installation opening 121 is provided on one side of the housing 120, with the protective cover 140 covering the installation opening 121.

[0054] A mounting port 121 is provided on one side of the housing 120, through which the conductive component 200, the limiting component 300, and the reset component 400 inside the housing 120 can be removed for maintenance. Additionally, the structure under test, the insulation resistance tester, and the dielectric loss tester can be connected to the conductive component 200 through the mounting port 121 for easy connection. The protective cover 140 prevents rainwater, dust, and other impurities from entering the housing 120 through the mounting port 121 and causing a short circuit, thus improving the stability and safety of this insulation and dielectric loss testing switching device.

[0055] On the other hand, this application provides a testing system including an insulation resistance detector, a dielectric loss detector, and an insulation and dielectric loss test switching device as described above. A conductive element 200 is electrically connected to the structure under test. When the conductive element 200 is in a first position, the insulation resistance detector is electrically connected to the connection portion 210, and the insulation resistance detector and the structure under test are connected in series. When the conductive element 200 is in a second position, one detection terminal of the dielectric loss detector is electrically connected to the connection portion 210, and the other detection terminal of the dielectric loss detector is connected to the structure under test to form a detection circuit.

[0056] This insulation and dielectric loss testing switching device, in conjunction with an insulation resistance tester and a dielectric loss tester, can complete the testing of the structure under test. For example... Figure 1 and Figure 2 As shown, the structure under test (SUT) needs to be electrically connected to the conductive component 200. When detecting the insulation resistance parameter of the SUT, the SUT and the conductive component 200 are not grounded. The insulation resistance detector is connected in series with the SUT, so that the SUT is located between the two detection terminals of the insulation resistance detector, thereby detecting the insulation resistance parameter of the SUT. When detecting the dielectric loss factor of the SUT, the SUT and the conductive component 200 are grounded. The dielectric loss detector and the SUT form a detection circuit, so that the SUT is located between the two detection terminals of the dielectric loss detector, thereby detecting the dielectric loss factor of the SUT. Through the above settings, the safety of detecting the dielectric loss factor and insulation resistance parameters can be improved.

[0057] It should be noted that the insulation resistance tester is connected in series with the structure under test. Resistance parameters are obtained by applying a high voltage to the structure. The dielectric loss tester can be connected to the structure under test using either a direct connection or a reverse connection method, both of which can achieve the purpose of detecting the dielectric loss factor. Therefore, operators can choose the appropriate wiring method according to actual needs to form a detection circuit between the dielectric loss tester and the structure under test. The above content is only a simple explanation of the detection principle for ease of understanding and does not limit the specific connection methods of this application.

[0058] A test method based on the above-described test system includes the following steps: moving the conductive element 200 to a second position, adjusting the limiting component 300 so that the limiting component 300 restricts the conductive element 200 to the second position, connecting a dielectric loss detector to the connecting part 210 so that the dielectric loss detector and the structure under test form a detection circuit to detect the dielectric loss factor of the structure under test; releasing the limiting component 300 from restricting the conductive element 200 so that the reset component 400 drives the conductive element 200 to move to a first position, connecting an insulation resistance detector to the connecting part 210 so that the insulation resistance detector and the structure under test are connected in series to detect the insulation resistance parameter of the structure under test.

[0059] like Figure 1 and Figure 2 As shown, during testing, one detection terminal of the dielectric loss detector and one detection terminal of the insulation resistance detector are both connected to the structure under test, electrically connecting the structure under test to the conductive component 200. The other detection terminal of the dielectric loss detector is connected to the connecting part 210, moving the conductive component 200 to the second position. At this point, the structure under test and the dielectric loss detector form a detection circuit and are grounded. The dielectric loss factor of the structure under test is obtained through the dielectric loss detector. The connection between the detection terminal of the dielectric loss detector and the connecting part 210 is then disconnected, moving the conductive component 200 to the first position. The other detection terminal of the insulation resistance detector is connected to the connecting part 210. At this point, the structure under test is located between the two detection terminals of the insulation resistance detector, and neither the insulation resistance detector nor the structure under test is grounded. The insulation resistance detector obtains the insulation resistance parameters of the structure under test. Using the above method, the dielectric loss factor and insulation resistance parameters can be tested simply by changing the tester on one side of the insulation and dielectric loss test switching device. For the structure to be tested located at a high place, this method can effectively reduce the number of times one has to climb up or the time required for operators to stay at a high place for testing, which can improve safety and operational efficiency to a certain extent.

[0060] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A switching device for insulation and dielectric loss testing, characterized in that, include: case; A stationary contact is fixedly connected to the inner wall of the housing and is used for grounding; A conductive component has a connecting portion. The conductive component is disposed inside the housing and slidably connected to the housing, allowing the conductive component to move to a first position and a second position. When the conductive component is in the first position, it is separated from the stationary contact, and the connecting portion is used for electrical connection to an insulation resistance detector for insulation resistance detection. When the conductive component is in the second position, it is in electrical contact with the stationary contact, and the connecting portion is used for electrical connection to a dielectric loss detector for dielectric loss detection. A limiting component, connected to the housing, is used to restrict the movement of the conductive element relative to the housing when the conductive element is in the second position; A reset member, connected to the housing, is used to drive the conductive member to reset from the second position to the first position when the limiting component releases the movement restriction of the conductive member relative to the housing.

2. The insulation and dielectric loss testing switching device according to claim 1, characterized in that, The conductive component includes a conductive rod and a guide block. The guide block is disposed on the outer side wall of the conductive rod, and the conductive rod is disposed inside the housing. A guide groove is formed on the inner wall of the housing, and the guide block is engaged in the guide groove. The conductive rod can move along the length direction of the guide groove with the guide block.

3. The insulation and dielectric loss testing switching device according to claim 2, characterized in that, The conductive component further includes an abutment block disposed on the outer side wall of the conductive rod. The reset component is connected to the abutment block and is used to drive the abutment block to move the conductive rod to the first position.

4. The insulation and dielectric loss testing switching device according to claim 1, characterized in that, The reset component includes a first reset spring, one end of which abuts against the housing and the other end of which abuts against the conductive component.

5. The insulation and dielectric loss testing switching device according to claim 1, characterized in that, The limiting component includes a limiting rod that passes through the side wall of the housing and is slidably connected to the housing. The conductive element has a limiting hole, and the limiting rod is inserted into the limiting hole to restrict the movement of the conductive element relative to the housing.

6. The insulation and dielectric loss testing switching device according to claim 5, characterized in that, The limiting assembly also includes a second return spring, one end of which is connected to the outer wall of the housing, and the other end is connected to the limiting rod.

7. The insulation and dielectric loss testing switching device according to claim 1, characterized in that, The housing includes an outer shell and a baffle. The conductive element and the baffle are both disposed inside the outer shell. The conductive element passes through the baffle and is slidably connected to the baffle.

8. The insulation and dielectric loss testing switching device according to claim 7, characterized in that, The housing also includes a protective cover, and an installation opening is provided on one side of the housing, with the protective cover covering the installation opening.

9. A testing system, characterized in that, The device includes an insulation resistance tester, a dielectric loss tester, and an insulation and dielectric loss test switching device as described in any one of claims 1-8. The conductive element is electrically connected to the structure under test. When the conductive element is in the first position, the insulation resistance tester is electrically connected to the connecting part, and the insulation resistance tester is connected in series with the structure under test. When the conductive element is in the second position, one detection terminal of the dielectric loss tester is electrically connected to the connecting part, and the other detection terminal of the dielectric loss tester is connected to the structure under test to form a detection circuit.

10. A test method based on the test system of claim 9, characterized in that, Includes the following steps: Move the conductive element to the second position, adjust the limiting component so that the limiting component restricts the conductive element to the second position, connect the dielectric loss detector to the connecting part so that the dielectric loss detector and the structure under test form a detection loop to detect the dielectric loss factor of the structure under test. Release the limiting component from the conductive element, so that the reset component drives the conductive element to move to the first position, connect the insulation resistance detector to the connection part, so that the insulation resistance detector is connected in series with the structure under test, so as to detect the insulation resistance parameter of the structure under test.

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