Method for testing use performance of electric leakage protection device

Abstract

The invention discloses a use performance test method of a leakage protection device. The use performance test method of the electric leakage protection device comprises the following steps: obtaining an environmental factor grade; obtaining an environmental factor influence coefficient; checking and connecting the devices; setting leakage current parameters; obtaining a sensitivity coefficient; and obtaining a use performance index. According to the invention, environmental factors for use performance testing are analyzed to obtain environmental factor grades, environmental factor influence coefficients are obtained according to the environmental factor grades, then a testing device is checked and connected, then leakage current parameters are set, sensitivity coefficients are obtained according to leakage action time obtained during testing, and the reliability of the testing device is improved. And finally, obtaining the use performance index according to the environmental factor influence coefficient, the sensitivity coefficient and the electric leakage action time, thereby achieving the improvement of the relevance between the use performance test result and the environment, and solving the problem of low relevance between the use performance test result and the environment in the prior art.

Description

[0001] This application is a divisional application of the application filed on July 17, 2024, with application number 202410956772.6 and invention name “A method for testing the performance of a leakage protection device”. Technical Field

[0002] The invention relates to the field of measuring electric variables, and in particular to a method for testing the performance of a leakage protection device. Background Art

[0003] With the rapid development of electrical equipment, safety issues such as electrical failure, leakage and short circuit have gradually appeared in the public's field of vision. In order to improve the safety performance of electrical equipment and protect users from electrical accidents, leakage protection devices have come into being. In the leakage protection device, the detection unit is the core part of the leakage protection device, which is responsible for monitoring the current in the circuit, especially the leakage current. With the increasing attention paid to electrical safety and personal safety, countries have begun to formulate relevant laws and regulations and standards, requiring electrical equipment to have sufficient safety features. Among them, testing and evaluating the performance of leakage protection devices has become an important task. Excellent performance testing can not only ensure the performance of leakage protection devices in actual use, but also effectively protect the safety of users' lives and property. Therefore, it is of great significance to study a performance testing method for leakage protection devices.

[0004] Existing performance tests are generally considered from the perspectives of detecting leakage current, testing action time and testing voltage. Among them, leakage current is detected through fault detection technologies such as differential current detection, zero-sequence current detection and fundamental frequency current change; leakage conditions are simulated through current injection devices, and the time it takes for the leakage protection device to cut off the circuit is tested to achieve the test action time; the insulation performance of the leakage protection device under rated voltage and whether it can work normally are tested through voltage withstand test technology; and the rated current and rated voltage test technology are used to verify whether the rated current and rated voltage of the leakage protection device meet the requirements.

[0005] For example, the invention patent with announcement number: CN106324349B announces an electrical resistance performance testing method and system, including: determining a printed circuit board to be tested, and deploying a corresponding conductive stack signal line for each conductive stack in the printed circuit board to be tested, then setting at least one via for the printed circuit board to be tested, and then deploying a corresponding via signal line for each via on the printed circuit board to be tested, and finally testing the resistance value between each conductive stack and the via through the conductive stack signal line and the via signal line.

[0006] For example, the leakage protector and leakage protection function detection method announced in the invention patent with announcement number: CN104422830B include: periodically judging whether the current timing time reaches a predetermined time length; automatically simulating the leakage current in the power grid when judging that the current timing time reaches the predetermined time length; measuring the leakage current in the power grid and judging whether the leakage current in the power grid is greater than a predetermined leakage current threshold; and simulating the leakage current in the power grid and judging that the leakage current in the power grid is not greater than the predetermined leakage current threshold, outputting a leakage protection function fault signal or outputting a circuit breaker disconnection control signal.

[0007] However, in the process of implementing the technical solution of the invention in the embodiments of the present application, the present application found that the above technology has at least the following technical problems:

[0008] The prior art only considers performance testing in a specific test environment, without considering that excessively high temperature will cause aging and performance degradation of the components of the leakage protection device, thereby affecting the sensitivity and reliability of the leakage protection device; in a humid environment, the insulation of the leakage protection device is unstable, resulting in false triggering of the leakage action or even failure to trigger, and there is a problem of low correlation between the performance test results and the environment. Summary of the invention

[0009] The embodiment of the present application solves the problem of low correlation between the performance test results and the environment by providing a method for testing the performance of a leakage protection device, thereby improving the correlation between the performance test results and the environment.

[0010] The embodiment of the present application provides a method for testing the performance of a leakage protection device, comprising the following steps: S1, analyzing the environmental factors for testing the performance of the leakage protection device according to the actual use scenario of the leakage protection device to obtain an environmental factor level, wherein the environmental factor level includes a temperature level and a humidity level; S2, obtaining an environmental factor influence coefficient according to the environmental factor level, wherein the environmental factor influence coefficient indicates the degree of influence of the environmental factor on the performance of the leakage protection device; S3, inspecting the leakage protection device and connecting an ammeter and an oscilloscope to the leakage protection device according to a preset connection method; S4, setting leakage current parameters according to the electrical safety standards and environmental factor influence coefficients followed by the leakage protection device; S5, injecting a simulated leakage current into the leakage protection device and recording the corresponding leakage action time, thereby obtaining a sensitivity coefficient of the leakage protection device, wherein the sensitivity coefficient indicates the sensitivity of the leakage protection device; S6, obtaining a performance index of the leakage protection device according to the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time, and issuing an early warning of the performance of the leakage protection device according to the performance index of the leakage protection device, wherein the performance index is used to describe the safety of the leakage protection device in actual use.

[0011] Furthermore, a specific method for obtaining the environmental factor influence coefficient is as follows: number the performance tests, and analyze the environmental factors during the performance tests to obtain corresponding temperature levels and humidity levels; obtain the initial temperature value and initial humidity value of the leakage protection device in the performance test through a temperature and humidity sensor and perform normalization to obtain the corresponding temperature value and humidity value, and obtain the environmental factor influence coefficient in combination with the obtained temperature level and humidity level.

[0012] Furthermore, the specific process of obtaining the sensitivity coefficient of the leakage protection device is as follows: injecting a simulated leakage current into the leakage protection device and adjusting the initial simulated leakage current through a current source so that the initial simulated leakage current is converted into a test simulated current; obtaining the leakage action time according to the time information of the simulated leakage current recorded by the oscilloscope, and obtaining the corresponding sensitivity coefficient in combination with the leakage current amplitude in the leakage protection device.

[0013] Furthermore, the sensitivity coefficient of the leakage protection device is calculated using the following formula:

[0014]

[0015] Among them, LM d is the sensitivity coefficient of the leakage protection device in the dth performance test, d is the number of performance tests, d = 1, 2, 3, ..., D, D is the total number of performance tests, f d.e is the end amplitude of the leakage protection device in the dth performance test, f d.o is the starting amplitude of the leakage protection device in the dth performance test, T d.e is the end time node of the leakage protection device in the dth performance test, T d.o is the starting time node of the leakage protection device in the dth performance test, a d is the temperature level of the leakage protection device in the dth performance test, b d is the humidity level of the leakage protection device in the dth performance test, and e represents a natural constant.

[0016] Furthermore, the performance index of the leakage protection device is calculated using the following formula:

[0017] XN=(e-2) S *log2(1+H*L);

[0018] Among them, XN is the performance index of the leakage protection device, S is the average value of the first leakage action time when testing the performance of the leakage protection device, H is the average value of the change in the environmental factor influence coefficient when testing the performance of the leakage protection device, L is the average value of the sensitivity coefficient when testing the performance of the leakage protection device, and e represents a natural constant.

[0019] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0020] 1. The environmental factors of the performance test are analyzed to obtain the environmental factor level, and then the environmental factor influence coefficient is obtained according to the environmental factor level. Then the test device is checked and connected, the leakage current parameters are set and tested, and the sensitivity coefficient is obtained according to the leakage action time obtained during the test. Finally, the performance index is obtained according to the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time, thereby realizing the correlation between the performance test results and the environment, and then realizing the improvement of the correlation between the performance test results and the environment, which effectively solves the problem of low correlation between the performance test results and the environment in the prior art.

[0021] 2. Connect the current source to the leakage protection device in a preset connection mode, then start the current source to inject simulated leakage current into the leakage protection device and adjust the current source to set the corresponding simulated leakage current. Finally, use an ammeter and an oscilloscope to measure the simulated leakage current in the leakage protection device and record the corresponding simulated leakage current amplitude and time information, thereby injecting different simulated leakage currents into the leakage protection device, thereby realizing the diversity of the performance test environment of the leakage protection device.

[0022] 3. The leakage action waveform interval is obtained by using the current waveform of the simulated leakage current obtained by the oscilloscope, and then the starting amplitude and the ending amplitude are obtained according to the leakage action waveform interval. Finally, the time node of the leakage action waveform interval is obtained through the time ruler on the oscilloscope, and the leakage action time is obtained according to the difference of the time nodes of the leakage action waveform interval, thereby realizing the accurate acquisition of the leakage action time, and further realizing the improvement of the accuracy of the performance test results of the leakage protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A flow chart of a method for testing the performance of a leakage protection device provided in an embodiment of the present application;

[0024] Figure 2 A flow chart of injection simulation leakage current provided in an embodiment of the present application;

[0025] Figure 3 A flow chart for obtaining leakage action time provided in an embodiment of the present application;

[0026] Figure 4 A graph showing changes in the usage performance index provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The embodiment of the present application solves the problem of low correlation between performance test results and the environment in the prior art by providing a method for testing the performance of a leakage protection device. The environmental factors for testing the performance of the leakage protection device are analyzed through the actual use scenarios of the leakage protection device to obtain the environmental factor level, and the environmental factor influence coefficient is obtained according to the environmental factor level. The leakage protection device is then inspected and the ammeter and the oscilloscope are connected to the leakage protection device according to a preset connection method. The leakage current parameters are set according to the electrical safety standards and the environmental factor influence coefficient followed by the leakage protection device. A simulated leakage current is injected into the leakage protection device and the corresponding leakage action time is recorded to obtain the sensitivity coefficient of the leakage protection device. Finally, the performance index of the leakage protection device is obtained according to the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time, and the performance of the leakage protection device is warned according to the performance index of the leakage protection device, thereby improving the correlation between the performance test results and the environment.

[0028] The technical solution in the embodiment of the present application is to solve the problem that the above-mentioned performance test results have low correlation with the environment. The overall idea is as follows:

[0029] The environmental factor level is obtained by analyzing the environmental factors of the performance test, and then the environmental factor influence coefficient is obtained according to the environmental factor level. Then the test device is checked and connected, the leakage current parameters are set, and the sensitivity coefficient is obtained based on the leakage action time obtained during the test. Finally, the performance index is obtained based on the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time, thereby achieving the effect of improving the correlation between the performance test results and the environment.

[0030] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0031] like Figure 1As shown, it is a flow chart of a method for testing the performance of a leakage protection device provided in an embodiment of the present application, the method comprising the following steps: S1, obtaining the environmental factor level: analyzing the environmental factors for testing the performance of the leakage protection device according to the actual use scenario of the leakage protection device to obtain the environmental factor level, the environmental factor level including the temperature level and the humidity level, the temperature level indicating the range corresponding to the temperature when testing the performance of the leakage protection device, the humidity level indicating the range corresponding to the humidity when testing the performance of the leakage protection device; S2, obtaining the environmental factor influence coefficient: obtaining the environmental factor influence coefficient according to the environmental factor level, the environmental factor influence coefficient indicating the degree of influence of the environmental factors on the performance of the leakage protection device, the environmental factors including temperature and humidity; S3, checking and connecting the device: checking the leakage protection device and connecting the ammeter and the oscilloscope to the leakage protection device according to the preset connection method; S4, setting the leakage current parameter: setting the leakage current parameter according to the leakage protection device The leakage current parameter is set according to the electrical safety standard and the influence coefficient of environmental factors. The leakage current parameter indicates the maximum leakage current passing through the leakage protection device before the leakage protection device is activated. The action of the leakage protection device is that the leakage protection device disconnects the circuit; S5, obtain the sensitivity coefficient: inject a simulated leakage current into the leakage protection device and record the corresponding leakage action time, thereby obtaining the sensitivity coefficient of the leakage protection device. The simulated leakage current includes the initial simulated leakage current and the test simulated leakage current. The leakage action time indicates the time from the leakage current reaching the leakage current parameter to the leakage protection device disconnecting the circuit, and the sensitivity coefficient indicates the sensitivity of the leakage protection device; S6, obtain the usage performance index: obtain the usage performance index of the leakage protection device according to the influence coefficient of environmental factors, the sensitivity coefficient and the leakage action time, and warn the usage performance of the leakage protection device according to the usage performance index of the leakage protection device. The usage performance index is used to describe the safety level of the leakage protection device in actual use.

[0032] In this embodiment, the actual use scenarios of the leakage protection device include usage occasions and special natural environments. Specifically, the usage occasions include residential, commercial buildings, industrial facilities, outdoors, temporary power use and medical facilities; the special natural environments include humid and high temperature environments. In the actual performance test of the leakage protection device, heating equipment and humidification equipment are used to simulate the actual usage scenarios, thereby achieving an accurate description of the test environment of the performance test, and further achieving an improvement in the correlation between the performance test results and the environment.

[0033] Furthermore, the specific method for obtaining the environmental factor influence coefficient is as follows: number the performance tests, and analyze the environmental factors during the performance tests to obtain the corresponding temperature level and humidity level; obtain the initial temperature value and initial humidity value of the leakage protection device in the performance test through the temperature and humidity sensor and perform normalization to obtain the corresponding temperature value and humidity value, and obtain the environmental factor influence coefficient in combination with the obtained temperature level and humidity level. The temperature and humidity sensor includes a temperature sensor and a humidity sensor. The environmental factor influence coefficient can not only be expressed by summing the normalized initial temperature value and initial humidity value in the performance test, but also can be calculated more accurately according to the temperature level, humidity level, temperature value and humidity value. The environmental factor influence coefficient is calculated using the following formula:

[0034]

[0035] Among them, HJ d is the environmental factor influence coefficient of the leakage protection device in the dth performance test, d is the number of performance tests, d = 1, 2, 3, ..., D, D is the total number of performance tests, a d is the temperature level of the leakage protection device in the dth performance test, b d is the humidity level of the leakage protection device in the dth performance test, w d is the temperature value of the leakage protection device in the dth performance test, s d is the humidity value of the leakage protection device in the dth performance test, and e represents a natural constant.

[0036] In this embodiment, the statistical table of changes in environmental factor influence coefficients is shown in Table 1:

[0037] Table 1 Statistics of changes in environmental factors' influence coefficients

[0038]

[0039] Specifically, the unit of temperature value is ℃, and the unit of humidity value is %. It can be seen from the statistical table of changes in the environmental factor influence coefficient that in the performance test of the leakage protection device, when the temperature level is the same, the greater the humidity level, the greater the environmental factor influence coefficient; when the humidity level is the same, the greater the temperature level, the greater the environmental factor influence coefficient. The greater the temperature level and the humidity level, the greater the leakage protection device is in a special environment, and the greater the environmental factor influence coefficient. According to the environmental factor influence coefficient in the leakage protection device test, the test environment of the leakage protection device test can be clearly judged, thereby further realizing a closer correlation between the performance test results and the environment, and then realizing an improved correlation between the performance test results and the environment.

[0040] Furthermore, the inspection of the leakage protection device includes appearance inspection and connection inspection; the appearance inspection of the leakage protection device is carried out by observing the appearance of the leakage protection device, and the appearance inspection includes checking the integrity of the shell of the leakage protection device and the consistency of the shell marking, the shell integrity indicates the integrity of the shell of the leakage protection device, and the shell marking consistency indicates the consistency between the shell marking of the leakage protection device and the equipment specifications and manufacturer information of the leakage protection device; the preset connection method is obtained according to the detailed installation and connection instructions provided by the leakage protection device manufacturer and the connection situation is checked, and the connection situation inspection includes the compliance of the connection line and the safety of the connection line; the compliance of the connection line indicates the compliance of the connection method of the input line and the output line of the leakage protection device with the preset connection method; the safety of the connection line indicates the degree of damage to the connector and the socket in the connection line.

[0041] In this embodiment, the shell identification of the leakage protection device includes model, specification, compliance standard, rated circuit breaking capacity, production date, safety certification mark, installation and operation instructions. The specific compliance standards include International Electrotechnical Commission standards, US safety standards and standards issued by the Standardization Administration of China; safety certification marks include EU conformity marks, US safety certifications, and China Compulsory Product Certification, thereby achieving more accurate testing of the leakage protection device and further improving the correlation between the performance test results and the environment.

[0042] Further, such as Figure 2 As shown, it is a flow chart for injecting simulated leakage current provided in an embodiment of the present application, and the specific steps for injecting simulated leakage current into the leakage protection device are: step one, connecting the leakage protection device: connecting the current source to the leakage protection device according to a preset connection method; step two, injecting simulated leakage current: starting the current source to inject simulated leakage current into the leakage protection device and adjusting the current source through the adjustment button of the current source to set the corresponding simulated leakage current; step three, recording current-time information: using an ammeter and an oscilloscope to measure the simulated leakage current in the leakage protection device and record the corresponding simulated leakage current amplitude and time.

[0043] In this embodiment, in actual use, the current source is connected to the leakage protection device according to a preset connection method, including the connection between the leakage protection device and other test equipment and the connection between the test fixture and the adapter. Specifically, the connection between the leakage protection device and other test equipment includes the connection between the leakage protection device test interface and the power line, the test current line and the ground line, thereby improving the accuracy of the performance test and further improving the correlation between the performance test results and the environment.

[0044] Furthermore, the specific process of obtaining the sensitivity coefficient of the leakage protection device is as follows: inject a simulated leakage current into the leakage protection device and adjust the initial simulated leakage current through a current source to convert the initial simulated leakage current into a test simulation current, the initial simulated leakage current is a current not greater than the leakage current parameter of the leakage protection device, and the test simulation current is a current greater than the leakage current parameter of the leakage protection device; obtain the leakage action time according to the time information of the simulated leakage current recorded by the oscilloscope, and obtain the corresponding sensitivity coefficient in combination with the leakage current amplitude in the leakage protection device.

[0045] In this embodiment, in actual use, the simulated leakage current and leakage current parameters are usually measured in milliamperes. For example, common leakage current parameters are 10mA to 30mA; the leakage action time is usually measured in milliseconds. For example, for a device with a low leakage current parameter of 10mA, the leakage action time is usually between tens of milliseconds and hundreds of milliseconds. This type of leakage protection device is usually used in occasions such as medical equipment that have extremely high requirements for personal safety, thereby achieving an improvement in the correlation between performance test results and the environment.

[0046] Further, such as Figure 3 As shown, it is a flow chart for obtaining leakage action time provided by an embodiment of the present application, and the specific method for obtaining leakage action time is as follows: obtain the leakage action waveform interval: obtain the leakage action waveform interval according to the current waveform of the simulated leakage current obtained by the oscilloscope, and obtain the starting amplitude and the ending amplitude according to the leakage action waveform interval, the leakage action waveform interval is the current waveform interval of the simulated current that causes the leakage action, the starting amplitude is the amplitude of the simulated current corresponding to the starting point of the leakage action waveform interval, and the ending amplitude is the amplitude of the simulated current corresponding to the ending point of the leakage action waveform interval; obtain the leakage action time: obtain the time nodes of the leakage action waveform interval through the time ruler on the oscilloscope, and obtain the leakage action time according to the difference of the time nodes of the leakage action waveform interval, the time nodes include the starting time node and the ending time node, the starting time node is the starting time node corresponding to the leakage action waveform interval, and the ending time node is the ending time node corresponding to the leakage action waveform interval.

[0047] In this embodiment, the oscilloscope generally includes a display screen, a control panel, an input interface, a vertical amplifier and a horizontal amplifier, wherein the display screen is the core component of the oscilloscope and is used to display the waveform of the input signal; the control panel is used to control various functions and parameter settings of the oscilloscope; the vertical amplifier is used to amplify the input signal and send the amplified signal to the display screen for display; the horizontal amplifier is used to control the display range and time resolution of the waveform on the time axis. In addition, the oscilloscope also has measurement, analysis, storage and playback functions, and specific measurement functions include measuring waveform amplitude, frequency, peak-to-peak value and period; the storage function can save the captured waveform to the internal memory or external storage medium and play back, analyze and export it, thereby achieving more accurate measurement of the leakage action time, and then achieving an improvement in the correlation between the performance test results and the environment.

[0048] Furthermore, the sensitivity coefficient of the leakage protection device can not only be directly obtained by the average value of the leakage action time in the performance test of the leakage protection device, but also can be more accurately calculated according to the time node of the leakage action waveform interval and the corresponding start amplitude and end amplitude and the environmental level of the performance test of the leakage protection device. The sensitivity coefficient of the leakage protection device is calculated using the following formula:

[0049]

[0050] Among them, LM d is the sensitivity coefficient of the leakage protection device in the dth performance test, d is the number of performance tests, d = 1, 2, 3, ..., D, D is the total number of performance tests, f d.e is the end amplitude of the leakage protection device in the dth performance test, f d.o is the starting amplitude of the leakage protection device in the dth performance test, T d.e is the end time node of the leakage protection device in the dth performance test, T d.o is the starting time node of the leakage protection device in the dth performance test, a d is the temperature level of the leakage protection device in the dth performance test, b d is the humidity level of the leakage protection device in the dth performance test, and e represents a natural constant.

[0051] In this embodiment, the horizontal axis of the oscilloscope is displayed as time resolution. The time resolution of the oscilloscope means that it can distinguish the time difference between two signals. A higher time resolution means that the oscilloscope can display the time characteristics of the signal more accurately. The amplitude refers to the voltage amplitude of the measured signal. In actual tests, when the amplitude of the leakage current changes suddenly, it means that there is a safety risk of abnormal operation of the equipment using the leakage protection device. The leakage protection device should be able to quickly identify the change in the amplitude of the leakage current to protect the safety of electricity use, thereby realizing the correlation between the sensitivity of the leakage protection device and environmental factors, and then realizing the improvement of the correlation between the performance test results and the environment.

[0052] Furthermore, the specific steps for obtaining the performance index of the leakage protection device are as follows: obtaining the change of the environmental factor influence coefficient according to the environmental factor influence coefficient in two adjacent performance tests of the leakage protection device, and the change of the environmental factor influence coefficient represents the degree of environmental change in the performance test of the leakage protection device; respectively averaging the change of the environmental factor influence coefficient, the leakage action time and the sensitivity coefficient to obtain the corresponding average value of the change of the environmental factor influence coefficient, the leakage action time and the sensitivity coefficient, and combining the first leakage action time average value obtained by normalizing the leakage action time average value to obtain the performance index of the leakage protection device, and the first leakage action time average value represents the result of normalizing the leakage action time average value.

[0053] In this embodiment, the average value of the leakage action time is normalized to eliminate the unit of the average value of the leakage action time. The unit of the average value of the leakage action time is milliseconds. In the performance test of the leakage protection device, the change in the environmental factor influence coefficient is a positive value. Specifically, the change in the environmental factor influence coefficient is the absolute value of the difference between the environmental factor influence coefficients in two adjacent performance tests, thereby realizing the correlation between the performance of the leakage protection device and the environmental factors, and further realizing the improvement of the correlation between the performance test results and the environment.

[0054] Furthermore, the performance index of the leakage protection device can not only be directly obtained by the ratio of the environmental factor influence coefficient to the sensitivity coefficient of the leakage protection device performance test, but also can be more accurately calculated according to the average value of the change of the environmental factor influence coefficient, the average value of the leakage action time and the average value of the sensitivity coefficient. The performance index of the leakage protection device is calculated using the following formula:

[0055] XN=(e-2) S *log2(1+H*L);

[0056] Among them, XN is the performance index of the leakage protection device, S is the average value of the first leakage action time when testing the performance of the leakage protection device, H is the average value of the change in the environmental factor influence coefficient when testing the performance of the leakage protection device, L is the average value of the sensitivity coefficient when testing the performance of the leakage protection device, and e represents a natural constant.

[0057] In this embodiment, if Figure 4 As shown, it is a graph of the change in the usage performance index provided in an embodiment of the present application, taking the first leakage action time average value of 11 and the sensitivity coefficient average value of 6 as an example. It can be seen from the graph that the greater the average value of the change in the environmental factor influence coefficient when testing the usage performance of the leakage protection device, the greater the usage performance index of the leakage protection device, indicating that the leakage protection device can adapt to larger changes in environmental factors, thereby further realizing the correlation between the usage performance test results of the leakage protection device and environmental factors, and further realizing the improvement of the correlation between the usage performance test results and the environment.

[0058] Furthermore, the specific process of issuing an early warning for the performance of the leakage protection device is as follows: multiple leakage protection devices are tested, and the average of the performance indexes of the leakage action time exceeding the standard cut-off time range of the leakage protection device is calculated to obtain a preset early warning threshold. The standard cut-off time range of the leakage protection device is the cut-off time range marked in the user manual of the leakage protection device. The preset early warning threshold represents the critical value of the leakage protection device when it is put into actual scenarios under specified environmental factors; the performance index of the leakage protection device is compared with the preset early warning threshold. If the performance index of the leakage protection device is less than the preset early warning threshold, an early warning is issued, indicating that the leakage protection device does not meet the requirements for application in actual scenarios; otherwise, it indicates that the leakage protection device is put into actual scenarios.

[0059] In this embodiment, in actual use, the user manual of the leakage protection device usually provides the cut-off time of the leakage protection device under different leakage current levels, as well as its corresponding action time curve and table. The cut-off time range marked in the user manual of the leakage protection device can usually be between tens of milliseconds and hundreds of milliseconds, thereby realizing early warning of the performance of the leakage protection device under different environmental factors, and further realizing the improvement of the correlation between the performance test results and the environment.

[0060] To summarize, the embodiment of the present application analyzes the environmental factors of the performance test to obtain the environmental factor level, then obtains the environmental factor influence coefficient according to the environmental factor level, then checks and connects the test device, sets the leakage current parameters and performs the test, obtains the sensitivity coefficient according to the leakage action time obtained during the test, and finally obtains the performance index according to the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time, thereby realizing the correlation between the performance test results and the environment, and then realizing the improvement of the correlation between the performance test results and the environment, effectively solving the problem of low correlation between the performance test results and the environment in the prior art.

[0061] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0062] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0063] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0064] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0065] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0066] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for testing the performance of a leakage protection device, characterized in that: The following steps are involved: S1, analyzing the environmental factors for testing the performance of the leakage protection device according to the actual use scenario of the leakage protection device to obtain an environmental factor level, wherein the environmental factor level includes a temperature level and a humidity level; S2, obtaining an environmental factor influence coefficient according to the environmental factor level, wherein the environmental factor influence coefficient indicates the influence degree of the environmental factor on the performance of the leakage protection device; The specific method for obtaining the environmental factor influence coefficient is as follows: Number the performance tests and analyze the environmental factors during the performance tests to obtain the corresponding temperature and humidity levels; The initial temperature value and initial humidity value of the leakage protection device in the performance test are obtained through the temperature and humidity sensor and normalized to obtain the corresponding temperature value and humidity value, and the environmental factor influence coefficient is obtained in combination with the obtained temperature level and humidity level; S3, check the leakage protection device and connect the ammeter and oscilloscope to the leakage protection device according to the preset connection method; S4, setting leakage current parameters according to the electrical safety standards followed by the leakage protection device and the influence coefficient of environmental factors; S5, injecting a simulated leakage current into the leakage protection device and recording the corresponding leakage action time, thereby obtaining a sensitivity coefficient of the leakage protection device, wherein the sensitivity coefficient indicates the sensitivity of the leakage protection device; The sensitivity coefficient of the leakage protection device is calculated using the following formula: Among them, LM d is the sensitivity coefficient of the leakage protection device in the dth performance test, d is the number of performance tests, d = 1, 2, 3, ..., D, D is the total number of performance tests, f d.e is the end amplitude of the leakage protection device in the dth performance test, f d.o is the starting amplitude of the leakage protection device in the dth performance test, T d.e is the end time node of the leakage protection device in the dth performance test, T d.o is the starting time node of the leakage protection device in the dth performance test, a d is the temperature level of the leakage protection device in the dth performance test, b d is the humidity level of the leakage protection device in the dth performance test, and e represents a natural constant; S6, obtaining a usage performance index of the leakage protection device according to the environmental factor influence coefficient, the sensitivity coefficient and the leakage action time of the leakage protection device, and issuing an early warning on the usage performance of the leakage protection device according to the usage performance index of the leakage protection device, wherein the usage performance index is used to describe the safety level of the leakage protection device in actual use; The performance index of the leakage protection device is calculated using the following formula: XN=(e-2) S *log2(1+H*L); Wherein, XN is the performance index of the leakage protection device, S is the average value of the first leakage action time when testing the performance of the leakage protection device, H is the average value of the change in the environmental factor influence coefficient when testing the performance of the leakage protection device, L is the average value of the sensitivity coefficient when testing the performance of the leakage protection device, and e represents a natural constant; The specific process of obtaining the sensitivity coefficient of the leakage protection device is as follows: Injecting a simulated leakage current into the leakage protection device and adjusting the initial simulated leakage current through a current source so that the initial simulated leakage current is converted into a test simulated current; The leakage action time is obtained according to the time information of the simulated leakage current recorded by the oscilloscope, and the corresponding sensitivity coefficient is obtained in combination with the leakage current amplitude in the leakage protection device; The specific method for obtaining the leakage action time is as follows: Obtaining a leakage action waveform interval according to the current waveform of the simulated leakage current obtained by the oscilloscope, and obtaining a starting amplitude and an ending amplitude according to the leakage action waveform interval; Obtaining the time nodes of the leakage action waveform interval by the time ruler on the oscilloscope, and obtaining the leakage action time according to the difference of the time nodes of the leakage action waveform interval, wherein the time nodes include a start time node and an end time node; The specific steps for obtaining the performance index of the leakage protection device are as follows: Obtaining the change amount of the environmental factor influence coefficient according to the environmental factor influence coefficient of the leakage protection device in two consecutive performance tests; The change in the environmental factor influence coefficient, the leakage action time and the sensitivity coefficient are averaged to obtain the corresponding average value of the change in the environmental factor influence coefficient, the leakage action time and the sensitivity coefficient, and the performance index of the leakage protection device is obtained by combining the first leakage action time average value obtained by normalizing the leakage action time average value.

2. A method for testing the performance of a leakage protection device as claimed in claim 1, characterized in that: The inspection of the leakage protection device includes appearance inspection and connection inspection; The appearance inspection includes checking the integrity of the shell of the leakage protection device and the consistency of the shell marking; The connection status check includes the compliance of the connection line and the safety of the connection line.

3. A method for testing the performance of a leakage protection device as claimed in claim 1, characterized in that: The specific steps of injecting simulated leakage current into the leakage protection device are: Step 1: Connect the current source to the leakage protection device according to a preset connection method; Step 2: Start the current source to inject simulated leakage current into the leakage protection device and adjust the current source to set the magnitude of the corresponding simulated leakage current; Step three, use an ammeter and an oscilloscope to measure the simulated leakage current in the leakage protection device and record the corresponding simulated leakage current amplitude and time information.

4. A method for testing the performance of a leakage protection device as claimed in claim 1, characterized in that ,The specific process of early warning of the performance of the leakage protection device is as follows: A preset warning threshold is obtained according to the actual use environment of the user and the standard cut-off time range of the leakage protection device, wherein the standard cut-off time range of the leakage protection device is the cut-off time range marked in the user manual of the leakage protection device; The performance index of the leakage protection device is compared with the preset warning threshold. If the performance index of the leakage protection device is less than the preset warning threshold, a warning is issued; otherwise, the leakage protection device is put into use in actual scenarios.

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