Pressure-resistant internal resistance testing device and circuit breaker testing equipment

Abstract

The application discloses a kind of pressure resistance internal resistance test device and circuit breaker test equipment, it is related to low-voltage electrical apparatus test field.The pressure resistance internal resistance test device includes mounting seat, with the internal resistance electrode of mounting seat fixed connection, and with the pressure resistance electrode of mounting seat movable connection, the pressure resistance electrode coaxially is arranged on the outside of the internal resistance electrode, and the pressure resistance electrode and the internal resistance electrode are mutually insulated, along the axial direction of the internal resistance electrode, the contact surface of the pressure resistance electrode is projected from the contact surface of the internal resistance electrode, after the contact surface of the pressure resistance electrode and busbar abut, the pressure resistance electrode moves towards the side close to the mounting seat, until the contact surface of the internal resistance electrode and the busbar abut.The pressure resistance internal resistance test device uses the design of pressure resistance electrode and internal resistance electrode coaxial arrangement, can be compatible with the test demand of different direction busbar, reduce the damage of component caused by force imbalance, to improve detection stability, and reduce maintenance cost.

Description

Technical Field

[0001] This application relates to the field of low-voltage electrical appliance testing technology, and more specifically, to a withstand voltage internal resistance testing device and a circuit breaker testing equipment. Background Technology

[0002] A frame circuit breaker is a mechanical switching device capable of connecting, carrying, and interrupting normal circuit current, and also capable of connecting, carrying, and interrupting current for a certain period of time under specified abnormal circuit conditions. During withstand voltage testing of a frame circuit breaker, if the busbar has both horizontal and vertical sections (e.g., in multi-specification products), the contact area between the withstand voltage electrodes on both sides and the busbar is small. Furthermore, because the withstand voltage electrodes are in eccentric contact with the busbar, this can easily lead to stress imbalance, resulting in damage to the linear bearing and increased maintenance costs. Utility Model Content

[0003] The purpose of this application is to provide a withstand voltage and internal resistance testing device and a circuit breaker testing equipment. The device adopts a design in which the withstand voltage electrode and the internal resistance electrode are arranged coaxially, which can be compatible with the testing requirements of busbars in different directions, reduce component damage caused by force imbalance, thereby improving the testing stability and reducing maintenance costs.

[0004] The embodiments of this application are implemented as follows:

[0005] A first aspect of this application provides a withstand voltage internal resistance testing device, including a mounting base, an internal resistance electrode fixedly connected to the mounting base, and a withstand voltage electrode movably connected to the mounting base. The withstand voltage electrode is coaxially sleeved on the outside of the internal resistance electrode, and the withstand voltage electrode and the internal resistance electrode are insulated from each other. Along the axial direction of the internal resistance electrode, the contact surface of the withstand voltage electrode protrudes beyond the contact surface of the internal resistance electrode. When the contact surface of the withstand voltage electrode abuts against a busbar, the withstand voltage electrode moves toward the side closer to the mounting base until the contact surface of the internal resistance electrode abuts against the busbar. This withstand voltage internal resistance testing device adopts a design where the withstand voltage electrode and the internal resistance electrode are coaxially arranged, which can accommodate the testing requirements of busbars in different directions, reduce component damage caused by force imbalance, thereby improving testing stability and reducing maintenance costs.

[0006] As one possible implementation, a first elastic member is further included, disposed between the pressure-resistant electrode and the mounting base, the first elastic member being connected to the pressure-resistant electrode and the mounting base, and the first elastic member being used to provide a restoring force for the pressure-resistant electrode.

[0007] In one possible implementation, there are multiple first elastic elements, which are evenly distributed along the circumferential direction of the internal resistance electrode.

[0008] As one possible implementation, it also includes a limiting member fixedly connected to the mounting base. The limiting member is sleeved outside the pressure-resistant electrode and is used to limit the movement of the pressure-resistant electrode toward the side away from the mounting base.

[0009] In one possible implementation, the limiting member is provided with a first limiting part, and the pressure-resistant electrode is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the movement of the pressure-resistant electrode relative to the mounting base.

[0010] As one possible implementation, it also includes a withstand voltage terminal, wherein the limiting member is provided with a through groove for exposing part of the withstand voltage electrode, the withstand voltage terminal is accommodated in the through groove, and the withstand voltage terminal is in contact with and fixedly connected to the withstand voltage electrode.

[0011] As one possible implementation, it also includes an internal resistance terminal and a fastener, wherein the internal resistance terminal is in contact with the internal resistance electrode and connected via the fastener.

[0012] As one possible implementation, it further includes a fixed base fixedly disposed on the side of the internal resistance electrode away from the busbar, and a second elastic member is disposed between the internal resistance electrode and the fixed base. The second elastic member is used to drive the internal resistance electrode to move toward the side away from the fixed base, so as to provide a clamping force for the internal resistance electrode to abut against the busbar.

[0013] As one possible implementation, it also includes an insulating element located between the withstand voltage electrode and the internal resistance electrode, wherein the orthogonal projection of the withstand voltage electrode onto the internal resistance electrode is within the orthogonal projection range of the insulating element onto the internal resistance electrode.

[0014] A second aspect of this application provides a circuit breaker testing device, including the aforementioned withstand voltage and internal resistance testing apparatus. This withstand voltage and internal resistance testing apparatus employs a design where the withstand voltage electrodes and internal resistance electrodes are arranged coaxially, enabling compatibility with testing requirements for busbars in different directions, reducing component damage caused by force imbalance, thereby improving testing stability and reducing maintenance costs.

[0015] The beneficial effects of the embodiments of this application include:

[0016] The withstand voltage internal resistance testing device includes a mounting base, an internal resistance electrode fixedly connected to the mounting base, and a withstand voltage electrode movably connected to the mounting base. The withstand voltage electrode is coaxially sleeved on the outside of the internal resistance electrode, and the withstand voltage electrode and the internal resistance electrode are insulated from each other. Along the axial direction of the internal resistance electrode, the contact surface of the withstand voltage electrode protrudes beyond the contact surface of the internal resistance electrode. When the contact surface of the withstand voltage electrode abuts against the busbar, the withstand voltage electrode moves toward the side closer to the mounting base until the contact surface of the internal resistance electrode abuts against the busbar. Because the withstand voltage electrode and the internal resistance electrode are coaxially arranged, the withstand voltage internal resistance testing device provided in this application can connect to the busbar through the same axial direction regardless of the installation direction of the busbar, without needing to adjust the spatial angle of the electrodes, significantly improving the adaptability of the device to complex installation scenarios. Traditional symmetrical electrode docking with busbars is prone to lateral force due to contact position deviation, leading to electrode or mounting bracket deformation. The coaxial structure provided in this application ensures that the force direction of both the withstand voltage electrode and the internal resistance electrode is along the axial direction, avoiding lateral force and reducing the probability of component damage due to force imbalance. The progressive docking process, with the withstand voltage electrode contacting first and the internal resistance electrode contacting later, ensures uniform and sufficient contact pressure between both electrodes and the busbar, reducing test signal fluctuations caused by poor contact and significantly improving the repeatability and accuracy of test data. On the one hand, the balanced force coaxial structure design extends the service life of core components such as electrodes and mounting brackets; on the other hand, the coaxial structure reduces the calibration frequency caused by component deformation, lowering the workload of maintenance personnel and the cost of spare parts replacement. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A perspective view of the withstand voltage internal resistance testing device provided in the embodiments of this application;

[0019] Figure 2 One of the cross-sectional views of the withstand voltage internal resistance testing device provided in the embodiments of this application;

[0020] Figure 3 An exploded view of the withstand voltage internal resistance testing device provided in the embodiments of this application;

[0021] Figure 4 A schematic diagram showing the withstand voltage internal resistance testing device provided in the embodiments of this application abutting against the busbar;

[0022] Figure 5This is a second cross-sectional view of the withstand voltage internal resistance testing device provided in the embodiments of this application.

[0023] Icons: 600- Withstand voltage and internal resistance testing device; 601- Withstand voltage electrode; 602- Internal resistance electrode; 603- Mounting base; 604- Limiting component; 605- Fixing base; 606- Insulating component; 607- First elastic component; 608- Pin; 609- Bushing; 610- Second elastic component; 611- Withstand voltage terminal; 612- Internal resistance terminal; 614- Fastener; 002- Busbar. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. These terms are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "horizontal," "vertical," etc., do not indicate that the component must be absolutely horizontal or suspended, but can be slightly tilted. The terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Please refer to the reference. Figures 1 to 5This application provides a withstand voltage internal resistance testing device 600, including a mounting base 603, an internal resistance electrode 602 fixedly connected to the mounting base 603, and a withstand voltage electrode 601 movably connected to the mounting base 603. The withstand voltage electrode 601 is coaxially sleeved on the outside of the internal resistance electrode 602, and the withstand voltage electrode 601 and the internal resistance electrode 602 are mutually insulated. Along the axial direction of the internal resistance electrode 602, the contact surface of the withstand voltage electrode 601 protrudes beyond the contact surface of the internal resistance electrode 602. When the contact surface of the withstand voltage electrode 601 abuts against the busbar 002, the withstand voltage electrode 601 moves towards the side closer to the mounting base 603 until the contact surface of the internal resistance electrode 602 abuts against the busbar 002. This withstand voltage internal resistance testing device 600 adopts a design where the withstand voltage electrode 601 and the internal resistance electrode 602 are arranged coaxially, which can accommodate the testing requirements of busbars 002 in different directions, reduce component damage caused by force imbalance, thereby improving testing stability and reducing maintenance costs.

[0028] It should be noted that the withstand voltage internal resistance testing device 600 includes a mounting base 603, an internal resistance electrode 602, and a withstand voltage electrode 601. The mounting base 603 serves as the basic load-bearing structure for mounting and supporting the internal resistance electrode 602 and the withstand voltage electrode 601. The internal resistance electrode 602 is fixedly connected to the mounting base 603 (e.g., fastened with bolts, pins 608, etc.), and its position relative to the mounting base 603 remains constant. It is mainly used to detect the internal resistance parameter of the busbar 002. The withstand voltage electrode 601 is movably connected to the mounting base 603 (e.g., sliding fit or elastic fit). (Connected), the withstand voltage electrode 601 can reciprocate along the axial direction of the internal resistance electrode 602; simultaneously, the withstand voltage electrode 601 has a ring structure, coaxially sleeved on the outside of the internal resistance electrode 602, and the two are electrically isolated by an insulating material (such as an insulating sleeve or air gap) to prevent mutual conduction between the internal resistance electrode 602 and the withstand voltage electrode 601; along the axial direction of the internal resistance electrode 602 (or the direction of movement of the withstand voltage electrode 601), the contact surface of the withstand voltage electrode 601 for contacting the busbar 002 protrudes beyond the contact surface of the internal resistance electrode 602 for contacting the busbar 002. That is to say, in the natural state (i.e., when the device is not in contact with the busbar 002), the contact surface of the withstand voltage electrode 601 is located closer to the busbar 002 than the contact surface of the internal resistance electrode 602.

[0029] When the device approaches busbar 002, the contact surface of the withstand voltage electrode 601 protrudes beyond the contact surface of the internal resistance electrode 602, causing the contact surface of the withstand voltage electrode 601 to first abut against busbar 002. As the device continues to move closer to busbar 002, the withstand voltage electrode 601, under the reaction force of busbar 002, begins to move (such as sliding or compressing) along the axial direction of the internal resistance electrode 602 towards the side closer to the mounting base 603. As the withstand voltage electrode 601 moves, the contact surface of the internal resistance electrode 602 gradually approaches busbar 002 until the contact surface of the internal resistance electrode 602 is fully abutted against busbar 002. At this point, the device completes docking with busbar 002 and can simultaneously perform withstand voltage testing and internal resistance detection.

[0030] The withstand voltage and internal resistance testing device 600 provided in this application features a coaxial arrangement of the withstand voltage electrode 601 and the internal resistance electrode 602. Regardless of the installation direction of the busbar 002 (e.g., horizontal, vertical, or inclined), the device can connect with the busbar 002 via the same axial direction without adjusting the spatial angle of the electrodes, significantly improving the adaptability of the device to complex installation scenarios. When traditional symmetrical electrodes connect with the busbar 002, lateral forces are easily generated due to contact position deviations, leading to deformation of the electrodes or mounting base 603. However, the coaxial structure provided by this device ensures that the force direction of both the withstand voltage electrode 601 and the internal resistance electrode 602 is along the axial direction, avoiding the generation of lateral forces and reducing the probability of component damage due to force imbalance (e.g., electrode bending, cracking of the mounting base 603).

[0031] The progressive contact process, where the withstand voltage electrode 601 contacts first and the internal resistance electrode 602 contacts later, ensures uniform and sufficient contact pressure between both electrodes and the busbar 002. This reduces test signal fluctuations caused by poor contact (such as breakdown voltage deviation during withstand voltage testing or unstable contact resistance during internal resistance testing), significantly improving the repeatability and accuracy of the test data. On one hand, the coaxial structure design with balanced force extends the service life of core components such as the electrodes and mounting base 603; on the other hand, the coaxial structure reduces the calibration frequency caused by component deformation, lowering the workload of maintenance personnel and the cost of spare parts replacement.

[0032] As one possible implementation method, such as Figures 2 to 5 As shown, the withstand voltage internal resistance testing device 600 also includes a first elastic element 607 disposed between the withstand voltage electrode 601 and the mounting base 603. The first elastic element 607 is connected to the withstand voltage electrode 601 and the mounting base 603, and the first elastic element 607 is used to provide a reset force for the withstand voltage electrode 601.

[0033] It should be noted that the withstand voltage internal resistance testing device 600 also includes a first elastic element 607, which is located between the withstand voltage electrode 601 and the mounting base 603, and is connected to the withstand voltage electrode 601 and the mounting base 603 respectively to form an elastic support structure. When the contact surface of the withstand voltage electrode 601 abuts against the busbar 002 and moves toward the side closer to the mounting base 603, the first elastic element 607 will deform due to compression, and the first elastic element 607 has a tendency to return to its natural state, thereby improving the stability and reliability of the contact between the withstand voltage electrode 601 and the busbar 002; when the test is completed and the device is separated from the busbar 002, the first elastic element 607 will release the elastic force generated by the deformation, providing a reset force for the withstand voltage electrode 601, pushing the withstand voltage electrode 601 to move toward the side away from the mounting base 603 along the axial direction of the internal resistance electrode 602 until it returns to the initial state, that is, along the axial direction of the internal resistance electrode 602, the contact surface of the withstand voltage electrode 601 protrudes again from the contact surface of the internal resistance electrode 602.

[0034] The reset function of the first elastic element 607 ensures that the withstand voltage electrode 601 automatically returns to its initial position after each test, eliminating the need for manual adjustment and allowing the device to quickly enter the next test state, thus improving testing efficiency. During the reset process, the elastic force of the first elastic element 607 acts evenly on the withstand voltage electrode 601, preventing collisions or friction between the withstand voltage electrode 601 and other components due to uneven force during reset, reducing the probability of component damage and further extending the service life of the device. Because the withstand voltage electrode 601 can accurately reset to its initial position each time, its relative position with the internal resistance electrode 602 remains consistent, thereby ensuring a stable contact state between the electrode and the busbar 002 during each test, which is beneficial for maintaining the accuracy and consistency of test data.

[0035] As one possible implementation method, such as Figures 2 to 5 As shown, there are multiple first elastic elements 607, which are evenly distributed along the circumferential direction of the internal resistance electrode 602.

[0036] It should be noted that in this withstand voltage internal resistance testing device 600, the number of first elastic elements 607 is set to multiple, and the multiple first elastic elements 607 are evenly distributed along the circumference of the internal resistance electrode 602. Specifically, the multiple first elastic elements 607 are arranged at equal intervals in the annular region between the withstand voltage electrode 601 and the mounting base 603 with the axis of the internal resistance electrode 602 as the center, and each first elastic element 607 is connected to the withstand voltage electrode 601 and the mounting base 603 respectively.

[0037] When the pressure-resistant electrode 601 comes into contact with the busbar 002 and moves toward the side closer to the mounting base 603, multiple uniformly distributed first elastic elements 607 will be simultaneously compressed and deformed. The elastic force they generate will act evenly on different positions of the pressure-resistant electrode 601 to ensure that there is surface contact between the pressure-resistant electrode 601 and the busbar 002. When the test is completed and the device is separated from the busbar 002, these first elastic elements 607 will release their elastic force, and the reset force provided to the pressure-resistant electrode 601 will be evenly distributed along the circumferential direction, pushing the pressure-resistant electrode 601 to reset smoothly.

[0038] Multiple first elastic elements 607 are evenly distributed along the circumference, which makes the force on the withstand voltage electrode 601 more uniform during movement and reset. This avoids tilting or offset of the withstand voltage electrode 601 due to excessive local force, ensuring the coaxiality of the withstand voltage electrode 601 and the internal resistance electrode 602, and further ensuring the stability of the contact between the electrode and the busbar 002. The multiple first elastic elements 607 share the elastic force, distributing the load borne by a single elastic element, reducing the risk of affecting the normal operation of the entire device due to fatigue or damage of a single elastic element, and extending the overall service life of the first elastic elements 607. Due to the more balanced force, the positional accuracy of the withstand voltage electrode 601 after each reset is higher, and the relative positional deviation with the internal resistance electrode 602 is smaller. This results in a high degree of consistency in the contact state between the electrode and the busbar 002 during each test, which is beneficial to improving the repeatability and reliability of the test data.

[0039] As one possible implementation method, such as Figures 1 to 4 As shown, the withstand voltage internal resistance testing device 600 also includes a limiting member 604 fixedly connected to the mounting base 603. The limiting member 604 is sleeved outside the withstand voltage electrode 601 and is used to limit the movement of the withstand voltage electrode 601 toward the side away from the mounting base 603.

[0040] It should be noted that the withstand voltage internal resistance testing device 600 also includes a limiting member 604, which is fixedly connected to the mounting base 603 and is sleeved on the outside of the withstand voltage electrode 601, forming a surrounding limiting structure for the withstand voltage electrode 601. When the test is completed and the device is separated from the busbar 002, the first elastic member 607 provides a restoring force to push the withstand voltage electrode 601 to move away from the mounting base 603. The limiting member 604 will prevent the withstand voltage electrode 601 from moving excessively. When the withstand voltage electrode 601 moves to the preset position, it will contact the limiting member 604, which will then restrict the withstand voltage electrode 601 from continuing to move away from the mounting base 603, ensuring that the withstand voltage electrode 601 remains in the appropriate initial position.

[0041] The limiting component 604 precisely restricts the position of the withstand voltage electrode 601 after reset, preventing over- or under-reset of the withstand voltage electrode 601 due to factors such as fluctuations in the elastic force of the first elastic component 607. This ensures that the contact surface of the withstand voltage electrode 601 consistently protrudes beyond the contact surface of the internal resistance electrode 602, guaranteeing consistency in the initial state for each test and improving test accuracy. Without the limiting component 604, the withstand voltage electrode 601 might collide with other components of the device during reset due to inertia or excessive elastic force. The presence of the limiting component 604 effectively avoids this situation, reducing the possibility of component damage and extending the device's service life. The stable initial position makes the contact process between the withstand voltage electrode 601 and the busbar 002 more stable during each test, reducing problems such as poor contact caused by initial position deviations and further enhancing the reliability of the device operation.

[0042] As one possible implementation method, such as Figure 2 and Figure 4 As shown, the limiting member 604 is provided with a first limiting portion, and the withstand voltage electrode 601 is provided with a second limiting portion. The first limiting portion and the second limiting portion cooperate to limit the movement of the withstand voltage electrode 601 relative to the mounting base 603. For example, in this embodiment, the first limiting portion is an annular sidewall of the limiting member 604 extending toward the withstand voltage electrode 601, and the second limiting portion is an annular protrusion of the withstand voltage electrode 601 extending toward the limiting member 604.

[0043] It should be noted that a first limiting part and a second limiting part are respectively provided on the limiting member 604 and the pressure-resistant electrode 601, which cooperate with each other. The first limiting part is located on the limiting member 604, and the second limiting part is located on the pressure-resistant electrode 601. Their positions correspond to each other and can interact to form a limiting fit structure. During the movement of the pressure-resistant electrode 601 toward the side away from the mounting base 603, when the pressure-resistant electrode 601 moves to the initial position, the first limiting part and the second limiting part contact and block each other, thereby restricting the pressure-resistant electrode 601 from continuing to move and ensuring that the pressure-resistant electrode 601 stays in the appropriate initial position.

[0044] As one possible implementation method, such as Figures 1 to 3 As shown, the withstand voltage internal resistance testing device 600 also includes a withstand voltage terminal 611. The limiting member 604 is provided with a through groove for exposing part of the withstand voltage electrode 601. The withstand voltage terminal 611 is housed in the through groove and is in contact with and fixedly connected to the withstand voltage electrode 601.

[0045] It should be noted that the withstand voltage internal resistance testing device 600 also includes a withstand voltage terminal 611. A through slot is formed on the limiting member 604, the function of which is to expose part of the withstand voltage electrode 601. The withstand voltage terminal 611 is accommodated in the through slot, and the withstand voltage terminal 611 is in contact with the exposed withstand voltage electrode 601. At the same time, the two can be fixedly connected by fasteners 614 (such as screws) to form an electrical connection path. During the withstand voltage test, the test circuit can be electrically connected to the withstand voltage electrode 601 through the withstand voltage terminal 611, so that the test voltage can be transmitted to the withstand voltage electrode 601 through the withstand voltage terminal 611, and then the withstand voltage test of the busbar 002 is completed through the contact between the withstand voltage electrode 601 and the busbar 002.

[0046] The withstand voltage terminal 611 is fixedly connected to the withstand voltage electrode 601 with good contact, ensuring stable electrical signal transmission during testing, reducing test data errors caused by poor contact, and improving the accuracy of withstand voltage testing. The through-slot provides reasonable installation space for the withstand voltage terminal 611, allowing it to be cleverly integrated into the device without affecting the normal movement of the withstand voltage electrode 601, while also making the overall structure more compact and saving installation space. When the withstand voltage terminal 611 experiences wear or failure, its installation within the through-slot and relatively simple connection to the withstand voltage electrode 601 facilitate disassembly, replacement, and maintenance, reducing the maintenance difficulty and cost of the device.

[0047] As one possible implementation method, such as Figures 1 to 3 As shown, the withstand voltage internal resistance testing device 600 also includes an internal resistance terminal 612 and a fastener 614. The internal resistance terminal 612 is in contact with the internal resistance electrode 602 and is connected by the fastener 614.

[0048] It should be noted that the withstand voltage internal resistance testing device 600 also includes an internal resistance terminal 612 and a fastener 614. The internal resistance terminal 612 is in contact with the internal resistance electrode 602, and the two can be fixedly connected by the fastener 614 (such as a screw) to form a stable electrical connection path. The fastener 614 tightly fixes the internal resistance terminal 612 and the internal resistance electrode 602, ensuring that the two will not be relatively displaced during device operation. During internal resistance testing, the test circuit can be electrically connected to the internal resistance electrode 602 through the internal resistance terminal 612, so that the test current can be transmitted to the internal resistance electrode 602 through the internal resistance terminal 612, and then the internal resistance test of the busbar 002 is completed through the contact between the internal resistance electrode 602 and the busbar 002.

[0049] The internal resistance terminal 612 and the internal resistance electrode 602 are connected by fasteners 614, ensuring a tight and secure connection. This effectively prevents poor contact caused by vibration or loosening, ensuring stable electrical signal transmission during internal resistance testing and improving the reliability of test data. The fastener 614 connection method integrates the internal resistance terminal 612 and the internal resistance electrode 602 into a single unit, reducing relative movement between components, enhancing the overall structural stability of the device, and extending its service life. The fastener 614 connection also simplifies and facilitates the installation of the internal resistance terminal 612 and the internal resistance electrode 602. Furthermore, subsequent maintenance or replacement can be quickly disassembled, reducing maintenance costs and complexity.

[0050] As one possible implementation method, such as Figures 1 to 4 As shown, the internal resistance withstand voltage test device 600 also includes a fixed base 605 fixedly disposed on the side of the internal resistance electrode 602 away from the busbar 002. A second elastic element 610 is disposed between the internal resistance electrode 602 and the fixed base 605. The second elastic element 610 is used to drive the internal resistance electrode 602 to move toward the side away from the fixed base 605, so as to provide a clamping force for the internal resistance electrode 602 to abut against the busbar 002.

[0051] It should be noted that the withstand voltage internal resistance testing device 600 also includes a fixed base 605 and a second elastic element 610. The fixed base 605 is fixedly disposed on the side of the internal resistance electrode 602 away from the busbar 002, and the fixed base 605 is relatively fixed to the mounting base 603. The second elastic element 610 is located between the internal resistance electrode 602 and the fixed base 605, and is connected to both the internal resistance electrode 602 and the fixed base 605. During operation, the second elastic element 610 is always under stress, and the elastic force generated by the second elastic element 610 drives the internal resistance electrode 602 to move towards the side away from the fixed base 605. When the contact surface of the internal resistance electrode 602 abuts against the busbar 002, the elastic force of the second elastic element 610 is converted into a clamping force between the internal resistance electrode 602 and the busbar 002, ensuring close contact between the two. Even if there is slight displacement or vibration of the busbar 002 during the test, the elastic force of the second elastic element 610 can be adjusted in real time to maintain a stable clamping force.

[0052] Stable clamping force ensures that the internal resistance electrode 602 and the busbar 002 maintain good contact at all times, avoiding test signal attenuation or distortion caused by poor contact, and significantly improving the accuracy of internal resistance test data. The elastic deformation capability of the second elastic element 610 can compensate for minor deviations in the thickness or installation position of the busbar 002, enabling the device to be compatible with testing different specifications of busbar 002 within a certain range, enhancing the versatility of the device. The flexible clamping achieved through elastic force avoids rigid collisions between the internal resistance electrode 602 and the busbar 002, reducing the wear on the contact surfaces and extending the service life of both the electrode and the busbar 002.

[0053] As one possible implementation method, such as Figures 2 to 4 As shown, the withstand voltage internal resistance testing device 600 also includes a bushing 609. A fixing seat 605 is sleeved on the outside of the internal resistance electrode 602. Along the axial direction of the internal resistance electrode 602, a second elastic element 610 is located between the internal resistance electrode 602 and the fixing seat 605. Along the radial direction of the internal resistance electrode 602, the bushing 609 is located between the internal resistance electrode 602 and the fixing seat 605, and the bushing 609 is fixedly connected to the fixing seat 605. The bushing 609 can be made of copper or plastic. By adding a bushing 609 between the internal resistance electrode 602 and the fixing seat 605, the movement of the internal resistance electrode 602 relative to the fixing seat 605 along the axial direction of the internal resistance electrode 602 can be made smoother. It also protects and lubricates the internal resistance electrode 602 and the fixing seat 605, preventing them from jamming due to wear and affecting the movement of the internal resistance electrode 602.

[0054] As one possible implementation method, such as Figures 1 to 3 As shown, the withstand voltage internal resistance testing device 600 also includes an insulating member 606, which is located between the withstand voltage electrode 601 and the internal resistance electrode 602. The orthogonal projection of the withstand voltage electrode 601 onto the internal resistance electrode 602 is located within the orthogonal projection range of the insulating member 606 onto the internal resistance electrode 602.

[0055] It should be noted that the withstand voltage and internal resistance testing device 600 also includes an insulating component 606, which is located between the withstand voltage electrode 601 and the internal resistance electrode 602, serving to isolate them. From the axial projection of the internal resistance electrode 602, the orthographic projection of the withstand voltage electrode 601 onto the internal resistance electrode 602 is completely within the orthographic projection range of the insulating component 606 onto the internal resistance electrode 602; that is, the projection of the insulating component 606 covers the entire area opposite to the withstand voltage electrode 601 and the internal resistance electrode 602. Since the withstand voltage electrode 601 and the internal resistance electrode 602 are used for withstand voltage testing and internal resistance testing respectively, they need to maintain electrical isolation. The insulating component 606 effectively blocks the current path between them, avoiding electrical signal interference. Simultaneously, the position of the insulating component 606 ensures that the withstand voltage electrode 601 and the internal resistance electrode 602 are always separated by the insulating component 606 during relative movement, preventing insulation failure due to positional changes.

[0056] The insulating component 606 completely isolates the withstand voltage electrode 601 and the internal resistance electrode 602, ensuring that the electrical signals from the withstand voltage test and the internal resistance test do not interfere with each other. This avoids test data errors caused by signal crosstalk and improves the accuracy of both tests. The projection of the withstand voltage electrode 601 is entirely within the projection range of the insulating component 606, eliminating any gaps or leaks that may exist between them. Even under long-term use or vibration environments, it can stably maintain its insulation performance, reducing the risk of short circuits in the device. The coverage design of the insulating component 606 matches the coaxial arrangement and relative movement of the withstand voltage electrode 601 and the internal resistance electrode 602, ensuring that it does not obstruct the normal movement of the electrodes and guaranteeing smooth testing.

[0057] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0058] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

Claims

1. A withstand voltage internal resistance testing device, characterized in that, The device includes a mounting base (603), an internal resistance electrode (602) fixedly connected to the mounting base (603), and a withstand voltage electrode (601) movably connected to the mounting base (603). The withstand voltage electrode (601) is coaxially sleeved on the outside of the internal resistance electrode (602), and the withstand voltage electrode (601) and the internal resistance electrode (602) are mutually insulated. Along the axial direction of the internal resistance electrode (602), the contact surface of the withstand voltage electrode (601) protrudes from the contact surface of the internal resistance electrode (602). When the contact surface of the withstand voltage electrode (601) abuts against the busbar (002), the withstand voltage electrode (601) moves toward the side closer to the mounting base (603) until the contact surface of the internal resistance electrode (602) abuts against the busbar (002).

2. The withstand voltage internal resistance testing device according to claim 1, characterized in that, It also includes a first elastic member (607) disposed between the withstand voltage electrode (601) and the mounting base (603), the first elastic member (607) being connected to the withstand voltage electrode (601) and the mounting base (603), and the first elastic member (607) being used to provide a restoring force for the withstand voltage electrode (601).

3. The withstand voltage internal resistance testing device according to claim 2, characterized in that, The number of the first elastic element (607) is multiple, and the multiple first elastic elements (607) are evenly distributed along the circumferential direction of the internal resistance electrode (602).

4. The withstand voltage internal resistance testing device according to any one of claims 1 to 3, characterized in that, It also includes a limiting member (604) fixedly connected to the mounting base (603), the limiting member (604) being sleeved outside the withstand voltage electrode (601), the limiting member (604) being used to limit the movement of the withstand voltage electrode (601) toward the side away from the mounting base (603).

5. The withstand voltage internal resistance testing device according to claim 4, characterized in that, The limiting member (604) is provided with a first limiting part, and the pressure-resistant electrode (601) is provided with a second limiting part. The first limiting part and the second limiting part cooperate to limit the movement of the pressure-resistant electrode (601) relative to the mounting base (603).

6. The withstand voltage internal resistance testing device according to claim 4, characterized in that, It also includes a withstand voltage terminal (611), and the limiting member (604) is provided with a through groove for exposing part of the withstand voltage electrode (601). The withstand voltage terminal (611) is housed in the through groove and is in contact with and fixedly connected to the withstand voltage electrode (601).

7. The withstand voltage internal resistance testing device according to claim 6, characterized in that, It also includes an internal resistance terminal (612) and a fastener (614), the internal resistance terminal (612) being in contact with the internal resistance electrode (602) and connected via the fastener (614).

8. The withstand voltage internal resistance testing device according to claim 1, characterized in that, It also includes a fixing base (605) fixedly disposed on the side of the internal resistance electrode (602) away from the busbar (002), and a second elastic member (610) is disposed between the internal resistance electrode (602) and the fixing base (605). The second elastic member (610) is used to drive the internal resistance electrode (602) to move toward the side away from the fixing base (605) so as to provide a clamping force for the internal resistance electrode (602) to abut against the busbar (002).

9. The withstand voltage internal resistance testing device according to claim 1, characterized in that, It also includes an insulating element (606) located between the withstand voltage electrode (601) and the internal resistance electrode (602), wherein the orthographic projection of the withstand voltage electrode (601) onto the internal resistance electrode (602) is within the orthographic projection range of the insulating element (606) onto the internal resistance electrode (602).

10. A circuit breaker testing device, characterized in that, Includes the withstand voltage internal resistance testing device (600) as described in any one of claims 1 to 9.

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