A test device for detecting the pressure resistance of a busbar

Abstract

The utility model relates to a kind of for detecting busbar pressure resistance testing device, including the test row plug for electrically connecting multiple busbar to be tested;With the relay switch component of test row plug electric connection and for cutting off and conducting the passage between it and test row plug;With relay switch component electric connection and for inputting high voltage to relay switch component and the test current that can obtain the input of relay switch component's program-controlled voltage-withstanding detector;Signal collector is electrically connected with relay switch component and program-controlled voltage-withstanding detector respectively;And industrial computer is electrically connected with program-controlled voltage-withstanding detector and signal collector respectively, by industrial computer, the same current of test current and preset current threshold is compared to determine the busbar to be tested is qualified, not only can realize automatically detecting to busbar to improve detection efficiency and meet the requirement of batch testing, but also can eliminate the security risk of test personnel and ensure the accuracy of test data.

Description

Technical Field

[0001] This utility model relates to the field of power equipment testing technology, and in particular to a testing device for testing the withstand voltage of busbars. Background Technology

[0002] Busbars play a crucial role in power transmission and distribution systems, and their withstand voltage performance directly affects the safe and stable operation of the power system. Therefore, the withstand voltage performance of busbars needs to be tested before leaving the factory. Currently, the industry's withstand voltage testing of busbars mainly faces the following problems: First, the withstand voltage performance testing of busbars is still done manually. This manual testing method requires reconnecting the positive and negative terminals of the high-voltage equipment to the positive and negative terminals of the next busbar to be tested after each busbar is tested, resulting in low testing efficiency and difficulty in meeting the requirements of batch testing. Second, testing personnel need to directly contact the high-voltage equipment (outputting 12KV voltage) to test the busbars, posing a significant safety hazard. Third, due to the manual testing method, the test data displayed on the testing instrument needs to be read manually and recorded on the data log sheet, which introduces errors in manual data reading and makes it difficult to ensure the accuracy of the test data. Utility Model Content

[0003] (1) Technical problems to be solved

[0004] This invention provides a testing device for detecting the pressure resistance of busbars. It can not only automatically detect busbars to improve testing efficiency and meet the requirements of batch testing, but also eliminate safety hazards for test personnel and ensure the accuracy of test data.

[0005] (2) Technical solution

[0006] In a first aspect, embodiments of this utility model provide a testing device for detecting the withstand voltage of busbars, comprising: a test connector for electrically connecting multiple busbars to be tested; a relay switch assembly electrically connected to the test connector for cutting off and connecting the path between the relay switch assembly and the test connector; a programmable withstand voltage tester electrically connected to the relay switch assembly for inputting a high voltage to the relay switch assembly and acquiring the test current input by the relay switch assembly; and a signal acquisition unit electrically connected to the relay switch assembly for controlling the opening or closing of the relay switch assembly, and the signal acquisition unit is also electrically connected to the programmable withstand voltage tester for acquiring the test current input by the relay switch assembly. The system includes a programmable withstand voltage tester that outputs a high-voltage feedback signal to the relay switch assembly; and an industrial control computer electrically connected to the programmable withstand voltage tester, used to control the programmable withstand voltage tester to output a high-voltage signal to the relay switch assembly and acquire the test current. The industrial control computer is also electrically connected to the signal acquisition unit, used to output control commands to the signal acquisition unit to control the opening and closing of the relay switch assembly. The industrial control computer can determine that the busbar under test is qualified based on the test current being the same as a preset current threshold. The industrial control computer acquires the feedback signal to control whether the programmable withstand voltage tester continues to output a high-voltage signal to the relay switch assembly and whether it continues to output control commands to the signal acquisition unit to control the opening or closing of the relay switch assembly.

[0007] Furthermore, the test terminal block includes a first detection terminal block and a second detection terminal block that are electrically connected to the busbar to be tested respectively. The first detection terminal block is provided with a plurality of first terminals, and each first terminal is electrically connected to the positive terminal of each busbar to be tested. The second detection terminal block is provided with a plurality of first terminals, and each second terminal is electrically connected to the negative terminal of each busbar to be tested.

[0008] Furthermore, the relay switch assembly includes a first switch assembly and a second switch assembly that are electrically connected to the test pin. The first switch assembly is electrically connected to the first detection terminal block, and the second switch assembly is electrically connected to the first detection terminal block.

[0009] Furthermore, the first switch assembly includes a plurality of first switches, the output terminal of each first switch being electrically connected to the first detection terminal block, and the first switch assembly includes a plurality of second switches, the input terminal of each second switch being electrically connected to the second detection terminal block.

[0010] Furthermore, the programmable withstand voltage tester includes a high-voltage output terminal electrically connected to the relay switch assembly and used to output the high-voltage voltage, and a current detection terminal used to acquire the test current.

[0011] Furthermore, the high-voltage output terminal is connected to an external high-voltage power supply and electrically connected to the first switch assembly of the relay switch assembly, for inputting a high-voltage voltage to the first switch assembly. The current detection terminal is electrically connected to the second switch assembly of the relay switch assembly, for acquiring the test current.

[0012] Furthermore, the high-voltage output terminal is electrically connected to the input terminals of multiple first switches on the first switching assembly, and the current detection terminal is electrically connected to the output terminals of multiple second switches on the second switching assembly.

[0013] Furthermore, the signal acquisition device is provided with multiple control ports, each of which is electrically connected to the control terminal of the first switch on the first switch assembly and the control terminal of the second switch on the second switch assembly.

[0014] Furthermore, the testing device also includes a radar detector, which is electrically connected to the industrial control computer and is used to input a sensing signal indicating that a tester has been detected to the industrial control computer.

[0015] Furthermore, the testing device also includes an audible and visual alarm, which is electrically connected to the industrial control computer. The industrial control computer receives the sensing signal output by the radar detector and outputs an alarm command to the audible and visual alarm.

[0016] (3) Beneficial effects

[0017] In summary, this utility model uses an industrial control computer to control a programmable withstand voltage tester to apply a high voltage to the busbar under test, and a signal acquisition device to control the opening and closing of the corresponding switches on the relay switch assembly. This enables the testing of multiple busbars under test. By reading the test current obtained by the programmable withstand voltage tester, and comparing the test current with a preset current threshold, the industrial control computer determines that the busbar under test is qualified based on the fact that the test current is the same as the preset current threshold. This not only enables automatic detection of busbars, thereby improving detection efficiency and meeting the requirements of batch testing, but also eliminates safety hazards for test personnel and ensures the accuracy of test data.

[0018] This invention uses a signal acquisition device to monitor in real time whether the programmable withstand voltage tester outputs high voltage to the relay switch assembly, which can further eliminate safety hazards in the busbar testing process and improve the safety of the testing device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the testing device of this utility model.

[0021] In the picture:

[0022] 1 - Industrial control computer; 10 - First detection terminal block; 11 - First terminal; 2 - Signal acquisition unit; 20 - Second detection terminal block; 21 - Second terminal; 3 - Programmable withstand voltage tester; 31 - High voltage output terminal; 32 - Current detection terminal;

[0023] 4-First switch assembly;

[0024] 5-Second switch assembly;

[0025] 6-Radar detector;

[0026] 7. Sound and light alarm;

[0027] 100 - Busbar to be tested; 101 - Positive end; 102 - Negative end. Detailed Implementation

[0028] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principle of this utility model by way of example, but should not be used to limit the scope of this utility model. That is, this utility model is not limited to the described embodiments, and covers any modifications, substitutions and improvements to the parts, components and connection methods without departing from the spirit of this utility model.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 1As shown, this utility model relates to a testing device for detecting the withstand voltage of busbars, including a test socket for electrically connecting multiple busbars 100 to be tested; a relay switch assembly electrically connected to the test socket and capable of cutting off and connecting the path between the relay switch assembly and the test socket; a programmable withstand voltage tester 3 electrically connected to the relay switch assembly for inputting a high voltage to the relay switch assembly and for acquiring the test current input to the relay switch assembly; and a signal acquisition unit 2 electrically connected to the programmable withstand voltage tester 3 for acquiring a feedback signal indicating whether the programmable withstand voltage tester 3 outputs a high voltage to the relay switch assembly and transmitting the feedback signal to the industrial control computer. Specifically, the programmable withstand voltage tester 3 is also provided with a separate signal transmitting terminal connected to the signal receiving port on the signal acquisition unit 3. Both the signal transmitting terminal and the signal receiving port are... The components used for signal transmission are common electronic devices in existing technologies, such as plugs and sockets in fiber optic transmitters, which will not be elaborated here. The signal acquisition unit 2 is electrically connected to the relay switch assembly to control its opening and closing. The industrial control computer 1 is electrically connected to the programmable withstand voltage tester 3 to control the tester to output a high voltage to the relay switch assembly and acquire the test current. The industrial control computer 1 is also electrically connected to the signal acquisition unit 2 to output control commands to control the opening and closing of the relay switch assembly. Specifically, the control command is an external input command from the tester to the industrial control computer to perform a performance test on one of the busbars to be tested. The industrial control computer can determine that the busbar 100 under test is qualified based on the test current being the same as a preset current threshold. Specifically, the industrial control computer 1 is selected from Siemens' SIMATIC series. The IPC547D industrial computer 1 receives an external input control command and then inputs it to the signal acquisition unit 2. This enables the signal acquisition unit 2 to control the opening and closing of relay switch assemblies. The external input control command can simultaneously control the opening and closing of the first switch of the first switch assembly and the second switch of the second switch assembly of the relay switch assembly, thereby enabling batch testing of multiple busbars 100 to be tested. For example, if the tester needs to test the first busbar 100 to be tested, the corresponding control command needs to be input on the industrial computer so that the industrial computer can send the control command to the signal acquisition unit 2. Through the control ports S1 and S5 on the signal acquisition unit 2, the control terminals of the corresponding first switch KA1 and second switch KA2 are controlled to close simultaneously. After the first switch KA1 and second switch KA2 are closed simultaneously, the control command controls the high-voltage output terminal 31 of the programmable withstand voltage tester 3 to input a high-voltage voltage to the busbar 100 to be tested.The industrial control computer 1 obtains the test current acquired by the programmable withstand voltage tester 3, that is, the industrial control computer 1 reads the test current value on the programmable withstand voltage tester 3, and compares the magnitude of the test current value with the current threshold preset in the industrial control computer 1, so as to determine whether the busbar 100 to be tested has a leakage current phenomenon, thereby determining whether the busbar 100 to be tested is a qualified product. Specifically, if the test current value is equal to the current threshold, or the absolute value of the difference between the test current value and the current threshold is within a preset difference range, wherein the preset difference can be preset in the industrial control computer based on the test experience of the tester, it is determined that there is no leakage current phenomenon in the busbar to be tested, the test ends and the tested busbar is a qualified product. If the test current value is not equal to the current threshold and / or the absolute value of the difference between the test current value and the current threshold is not within the preset difference range, it is determined that there is a leakage current phenomenon in the busbar to be tested, the test ends and the tested busbar is an unqualified product. Optionally, in order to facilitate the tester to identify unqualified products timely and efficiently during the test process, an alarm can be added to the industrial control computer, so as to give timely reminder to the tester and improve the screening accuracy of unqualified products. The alarm can be an audible alarm, a light alarm, or an audible and visual alarm. Certainly, it is also possible to send the information to the communication device of the tester (such as a computer, a mobile phone and other movable electronic devices) through a corresponding communication protocol by editing an email or a short message.

[0031] In this utility model, the industrial control computer controls the programmable withstand voltage tester to apply high voltage to the busbars to be tested, and the signal collector controls the corresponding switches on the relay switch assembly to open or close, so that a plurality of busbars to be tested can be tested. Then by reading the test current acquired by the programmable withstand voltage tester, the industrial control computer compares the test current with the preset current threshold, and determines that the busbar to be tested is qualified based on the fact that the test current is equal to the preset current threshold. This not only realizes automatic detection of busbars so as to improve the detection efficiency and meet the requirements of batch testing, but also eliminates the safety hazards of test personnel and ensures the accuracy of test data.

[0032] As a preferred embodiment, for example Figure 1As shown, the test connector includes a first detection terminal block 10 and a second detection terminal block 20, which are electrically connected to the busbars 100 under test, respectively. The first detection terminal block 10 has multiple first terminals 11, and each first terminal 11 is electrically connected to the positive terminal 101 of each busbar 100 under test. The second detection terminal block 20 has multiple second terminals 21, and each second terminal 21 is electrically connected to the negative terminal 102 of each busbar 100 under test. By electrically connecting the first and second detection terminal blocks to multiple busbars under test respectively, the drawback of having to manually reconnect the next busbar to be tested after testing one busbar can be reduced, thereby improving the testing efficiency. Specifically, for efficiency, the first detection terminal block 10 is provided with four first terminals 11 and the second detection terminal block 20 is provided with four second terminals 21. Each first terminal 11 is electrically connected to the positive terminal 101 of the busbar 100 to be tested, and each second terminal 21 is electrically connected to the negative terminal 102 of the busbar 100 to be tested. This ensures that the first detection terminal block 10 and the second detection terminal block 20 are connected to the corresponding busbar 100 to be tested and thus conduction is achieved. It should be noted that the number of first terminals 11 and second terminals 21 is not limited to four. The number of test terminals can be selected according to the number of busbars to be tested.

[0033] As another preferred implementation, such as Figure 1 As shown, the relay switch assembly includes a first switch assembly 4 and a second switch assembly 5 electrically connected to the test pin. The first switch assembly 4 is electrically connected to the first detection terminal block 10, and the second switch assembly 5 is electrically connected to the second detection terminal block 20. The first switch assembly 4 includes multiple first switches, the output of which is electrically connected to the first detection terminal block 10. The second switch assembly 5 includes multiple second switches, the input of which is electrically connected to the second detection terminal block 20. By opening or closing the first switch assembly 4 and the second switch assembly 5, the path between the first switch assembly and the first detection terminal block 10, and the path between the second switch assembly and the second detection terminal block 20, can be cut off and connected. This enables automatic detection of different busbars to be tested on a single testing device. Specifically, the first switch assembly 4 includes multiple first switches (such as...). Figure 1 The second switch assembly 5 includes multiple second switches (such as KA1, KA2, KA3, and KA4). Figure 1 (KA5, KA6, KA7, and KA8), the output terminal of each first switch is electrically connected to the first terminal 11 corresponding to the first detection terminal block 10, and the input terminal of each second switch is electrically connected to the corresponding second terminal 21 on the second detection terminal block 20, for example, as Figure 1As shown, the first switch KA1 is electrically connected to the first terminal 11 on the first detection terminal block 10; the first switch KA2 is electrically connected to the second terminal 11 on the first detection terminal block 10; the first switch KA3 is electrically connected to the third terminal 11 on the first detection terminal block 10; and the first switch KA4 is electrically connected to the fourth terminal 11 on the first detection terminal block 10. The first to fourth terminals 11 on the first detection terminal block 10 refer to the terminals 11 arranged sequentially from left to right on the first detection terminal block 10. Similarly, the second switches KA5, KA6, KA7, and KA8 are also electrically connected to the first to fourth terminals 21 on the second detection terminal block 20, respectively. It should be noted that to ensure the normal operation of the corresponding busbars under test, the first and second switches need to be matched to form corresponding control... The control switch pair, namely, one of the four first switches KA1, KA2, KA3 and KA4, and one of the four second switches KA5, KA6, KA7 and KA8, must be closed simultaneously. That is, the two first switches and second switches that are closed simultaneously match each other to form a corresponding control switch pair. Specifically, the first switch KA1 and the second switch KA5 are the control switch pair for the first busbar 100 to be tested, the first switch KA2 and the second switch KA6 are the control switch pair for the second busbar 100 to be tested, the first switch KA3 and the second switch KA7 are the control switch pair for the third busbar 100 to be tested, and the first switch KA4 and the second switch KA8 are the control switch pair for the fourth busbar 100 to be tested. The arrangement of the first to fourth busbars 100 to be tested is the same as the arrangement of the first terminals on the first detection terminal block 10.

[0034] As another alternative implementation method.

[0035] Preferably, such as Figure 1As shown, the programmable withstand voltage tester includes a high-voltage output terminal 31 electrically connected to the relay switch assembly and used to output a high-voltage voltage, and a current detection terminal 32 used to acquire the test current. The high-voltage output terminal 31 is connected to an external high-voltage power supply (not shown in the figure) and electrically connected to the first switch assembly 4 of the relay switch assembly, used to input a high-voltage voltage to the first switch assembly 4. The current detection terminal 32 is electrically connected to the second switch assembly 5 of the relay switch assembly, used to acquire the test current, and the high-voltage output terminal 31 is electrically connected to the input terminals of multiple first switches on the first switch assembly 4. The current detection terminal 32 is electrically connected to the second switch assembly 5. The output terminals of multiple second switches on the switch assembly 5 are electrically connected. The test current is the current input from the high voltage output terminal 31 of the self-controlled withstand voltage tester 3, which flows sequentially through the circuit consisting of the first switch assembly 4, the first detection terminal block 10, the busbar under test 100, the second detection terminal block 20, and the second switch assembly 5. The high voltage output of the self-controlled withstand voltage tester is used to test the high voltage output of the busbar under test, and the test current fed back by the busbar under test can be detected in real time by the current detection terminal. This can further improve the automated testing efficiency of the busbar under test and enhance the overall compactness of the testing device.

[0036] Preferably, such as Figure 1 As shown, the signal acquisition device 2 is equipped with multiple control ports. Each control port is electrically connected to the control terminal of the corresponding first switch on the first switch group 4 and the control terminal of the corresponding second switch on the second switch assembly 5. Specifically, the signal acquisition device 2 is equipped with eight control ports (e.g., Figure 1The control ports S1-S8 are shown, where control ports S1, S2, S3, and S4 are electrically connected to the control terminals of the corresponding first switches KA1, KA2, KA3, and KA4, respectively, and control ports S5, S6, S7, and S8 are electrically connected to the control terminals of the corresponding second switches KA5, KA6, KA7, and KA8, respectively. The signal acquisition device 2 is an RS485 signal acquisition device. After the industrial control computer 1 compares the actual acquired test current value with the preset current threshold value within the industrial control computer to determine whether the busbar under test is qualified, it receives the control signal generated by the industrial control computer 1 via control port S1. - Any one of S4 and one of the corresponding control ports S5-S8 can trigger the control terminal of the first switch and the control terminal of the second switch to open the first switch and the second switch respectively, ensuring the completion of this test. The signal acquisition device 2 can also acquire feedback signals indicating whether the programmable withstand voltage tester 3 outputs high voltage to the first switch assembly of the relay switch assembly and transmit these feedback signals to the industrial computer 1. Specifically, the feedback signals include a first feedback signal indicating that the programmable withstand voltage tester 3 does not output high voltage to the first switch assembly of the relay switch assembly, and a feedback signal indicating that the programmable withstand voltage tester 3 does not output high voltage to the first switch assembly of the relay switch assembly. The first switching assembly of the component outputs a second feedback signal of high voltage. It should be noted that this feedback signal is output by a voltage detection circuit located within the programmable withstand voltage tester 3, electrically connected to the high voltage output terminal 31, and used to receive the first voltage signal in the high-level state and the second voltage signal in the low-level state of the high voltage output terminal 31. This voltage detection circuit is a common existing technology in the field of electronic circuits, and will not be elaborated upon here. The feedback signal can be determined as either the first or second feedback signal by reading the first or second voltage signal using an RS485 signal acquisition device. The industrial control computer 1 receives the first feedback signal... When a feedback signal is received, the programmable withstand voltage tester 3 stops inputting high voltage to the relay switch assembly and simultaneously outputs a corresponding control command to the signal acquisition unit 2 to control the opening of the relay switch assembly. When the industrial control computer 1 receives the second feedback signal, it controls the programmable withstand voltage tester 3 to continue inputting high voltage to the relay switch assembly and simultaneously outputs a corresponding control command to the signal acquisition unit 2 to control the continued closing of the relay switch assembly. By monitoring in real time whether the programmable withstand voltage tester outputs high voltage to the relay switch assembly through the signal acquisition unit, potential safety hazards during the busbar testing process can be further eliminated, ensuring the safe operation of the testing device.

[0037] Preferably, such as Figure 1As shown, the testing device also includes a radar detector 6, which is electrically connected to the industrial control computer 1. The radar detector 6 is used to input a sensing signal indicating that a tester has been detected to the industrial control computer 1. After receiving the sensing signal, the industrial control computer 1 generates a control signal to stop the test busbar. Specifically, the radar detector 6 is preferably a radar life detector. After the radar detector 6 detects a tester and generates a corresponding sensing signal, it inputs the signal to the industrial control computer 1 so that the industrial control computer 1 can generate a corresponding control command to control the programmable withstand voltage tester 3 to stop outputting high voltage and / or control the corresponding first and second switches on the relay assembly to open simultaneously, thereby eliminating the safety hazard to the tester.

[0038] Preferably, such as Figure 1 As shown, the testing device also includes an audible and visual alarm 7, which is electrically connected to the industrial control computer 1. After receiving the sensing signal output by the radar detector 6, the industrial control computer 1 outputs an alarm command to the audible and visual alarm 7. Upon receiving the alarm command, the audible and visual alarm 7 emits an audible and visual alarm signal. Specifically, after the radar detector 6 detects the test personnel and generates a corresponding sensing signal, it inputs it to the industrial control computer 1. This allows the industrial control computer 1 to generate a corresponding control command to control the audible and visual alarm 7 to perform an alarm operation, thereby further eliminating potential safety hazards for the test personnel.

[0039] It should be clarified that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. This utility model is not limited to the specific steps and structures described above and shown in the figures. Furthermore, for the sake of brevity, detailed descriptions of known methods and techniques are omitted here.

[0040] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art without departing from the scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A testing device for detecting the pressure resistance of busbars, characterized in that, include: A test connector for electrically connecting multiple busbars (100) to be tested; A relay switch assembly, electrically connected to the test socket, is used to cut off and connect the path between the relay switch assembly and the test socket; The programmable withstand voltage tester (3) is electrically connected to the relay switch assembly and is used to input high voltage to the relay switch assembly and to obtain the test current input by the relay switch assembly. The signal acquisition device (2) is electrically connected to the relay switch assembly and is used to control the opening or closing of the relay switch assembly. The signal acquisition device (2) is electrically connected to the programmable withstand voltage tester (3). An industrial control computer (1) is electrically connected to the programmable withstand voltage tester (3) and is used to control the programmable withstand voltage tester (3) to output a high voltage to the relay switch assembly and acquire the test current; it is also electrically connected to the signal acquisition unit (2) and is used to output control commands to the signal acquisition unit (2) to control the opening or closing of the relay switch assembly; The industrial control computer (1) can determine whether the busbar (100) to be tested is qualified based on the fact that the test current is the same as the preset current threshold.

2. The testing apparatus according to claim 1, characterized in that, The test connector includes a first detection terminal block (10) and a second detection terminal block (20) that are electrically connected to the busbar (100) to be tested. The first detection terminal block (10) is provided with a plurality of first terminals (11), and each first terminal (11) is electrically connected to the positive terminal (101) of each busbar (100) to be tested. The second detection terminal block (20) is provided with a plurality of second terminals (21), and each second terminal (21) is electrically connected to the negative terminal (102) of each busbar (100) to be tested.

3. The testing apparatus according to claim 2, characterized in that, The relay switch assembly includes a first switch assembly (4) and a second switch assembly (5) electrically connected to the test pin. The first switch assembly (4) is electrically connected to the first detection terminal block (10), and the second switch assembly (5) is electrically connected to the second detection terminal block (20).

4. The testing apparatus according to claim 3, characterized in that, The first switch assembly (4) includes a plurality of first switches, the output terminal of each first switch being electrically connected to the first detection terminal block (10). The second switch assembly (5) includes a plurality of second switches, the input terminal of each second switch being electrically connected to the second detection terminal block (20).

5. The testing apparatus according to claim 2, characterized in that, The programmable withstand voltage tester includes a high voltage output terminal (31) electrically connected to the relay switch assembly and used to output the high voltage, and a current detection terminal (32) used to acquire the test current.

6. The testing apparatus according to claim 5, characterized in that, The high voltage output terminal (31) is connected to an external high voltage power supply and electrically connected to the first switch assembly (4) of the relay switch assembly, for inputting high voltage to the first switch assembly (4). The current detection terminal (32) is electrically connected to the second switch assembly (5) of the relay switch assembly, for obtaining the test current.

7. The testing apparatus according to claim 6, characterized in that, The high voltage output terminal (31) is electrically connected to the input terminals of multiple first switches on the first switch assembly (4), and the current detection terminal (32) is electrically connected to the output terminals of multiple second switches on the second switch assembly (5).

8. The testing apparatus according to claim 3, characterized in that, The signal acquisition device (2) is provided with multiple control ports, and each control port is electrically connected to the control terminal of the first switch on the first switch assembly (4) and the control terminal of the second switch on the second switch assembly (5).

9. The testing apparatus according to claim 1, characterized in that, It also includes a radar detector (6), which is electrically connected to the industrial control computer (1) and is used to input the sensing signal of the detected test personnel to the industrial control computer (1).

10. The testing apparatus according to claim 9, characterized in that, It also includes an audible and visual alarm (7), which is electrically connected to the industrial control computer (1). After receiving the sensing signal output by the radar detector (6), the industrial control computer (1) outputs an alarm command to the audible and visual alarm (7).

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