A low voltage leakage protection remote automatic testing system and device

Abstract

The present invention belongs to the field of leakage protection test technology, and in particular, relates to a low-voltage leakage protection remote automatic test system and device. The system includes a cloud platform, a communication module, an automatic test module, and an acoustic and optical alarm module; the cloud platform is used to obtain the duration of each test interval, send out a test signal and a reset signal, and is also used to analyze the safety level of the low-voltage leakage protector; the communication module is used to obtain the test signal and the reset signal sent by the cloud platform; the automatic test module is used to perform real-time self-test when the test signal transmitted by the communication module is received; the acoustic and optical alarm module is used to perform voice notification that the test is about to start when the test signal transmitted by the communication module is received, and is also used to immediately send out an acoustic and optical alarm when the test action fails. The present invention can timely identify and diagnose the performance status of the low-voltage leakage protector by automatically and in real time detecting the working status of the low-voltage leakage protector, thereby replacing manual detection with remote automatic testing, and greatly improving the inspection efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of leakage protection testing, and in particular relates to a low-voltage leakage protection remote automatic testing system and device. Background Art

[0002] In low-voltage power systems, low-voltage residual current devices (RCDs) can quickly detect and cut off residual current fault circuits to prevent electric shock or fire. As people become more dependent on electricity, the requirements for the reliability and stability of residual current devices are gradually increasing.

[0003] At present, low-voltage leakage protectors are generally tested manually, that is, a person presses the "test" button (or other designated test contacts) on the protector to check whether the mechanical action of the protector is normal; observes the action response of the protector to ensure that the circuit can be quickly cut off within the specified time, and checks whether its built-in contacts are sensitive and whether the circuit cutting function is normal.

[0004] Since there are many and complex electrical devices in commercial and office areas, and the number of employees is large, traditional manual inspection and testing is not only time-consuming, but also has the possibility of missed inspections. In addition, the "test" button on the leakage protection device is generally pressed manually, but due to the lack of awareness of regular maintenance or neglect of leakage protection failures, some users will not even press the "test" button once in several years, resulting in the leakage protection function not necessarily working properly, posing hidden dangers. In summary, the existing leakage protection testing technology has the problems of high manual testing frequency and low inspection efficiency. Summary of the invention

[0005] The present invention solves the problems of high manual testing frequency and low inspection efficiency in the prior art by providing a low-voltage leakage protection remote automatic testing system and device, realizes replacement of manual inspection with remote automatic testing, and greatly improves inspection efficiency.

[0006] The present invention provides a low-voltage leakage protection remote automatic test system, comprising: a cloud platform, a communication module, an automatic test module, and an audible and visual alarm module;

[0007] Cloud platform: used to obtain the duration of each test interval, send out test signals and reset signals, and also used to receive real-time self-test data, test data, reset data, and standard specification parameters of the low-voltage leakage protector, and analyze the safety level of the low-voltage leakage protector based on the real-time self-test data, test data, reset data, and standard specification parameters;

[0008] Communication module: used to obtain the test signal and reset signal sent by the cloud platform, obtain the real-time self-test data, test data and reset data sent by the automatic test module, and also used to store the standard specification parameters of the low-voltage leakage protector, and send the real-time self-test data, standard specification parameters, test data and reset data of the low-voltage leakage protector to the cloud platform;

[0009] Automatic test module: used to perform real-time self-test and obtain real-time self-test data when the test signal from the communication module is received. When the real-time self-test passes, the leakage test button is automatically turned on to obtain the test data. The leakage test button is automatically reset according to the reset signal from the communication module to obtain the reset data. It is also used to send the real-time self-test data, test data and reset data to the communication module;

[0010] Sound and light alarm module: It is used to give voice notification that the test is about to start when the test signal is received from the communication module, that is, before turning on the leakage test button. It is also used to immediately issue an sound and light alarm when the test action fails.

[0011] Preferably, the analysis process of the safety level of the low-voltage leakage protector in the cloud platform is:

[0012] The cloud platform analyzes the aging coefficient and abnormal fluctuation coefficient based on the test data, reset data, and standard specification parameters of the low-voltage leakage protector, and comprehensively analyzes the safety factor based on the aging coefficient and the abnormal fluctuation coefficient, and obtains the safety degree of the low-voltage leakage protector based on the safety factor;

[0013] The aging coefficient is used to reflect the physical and mechanical properties of the low-voltage leakage protector during long-term use;

[0014] The abnormal fluctuation coefficient is used to reflect the short-term electrical performance of the low-voltage leakage protector;

[0015] The safety factor is used to reflect the safety level of the low-voltage leakage protector.

[0016] Preferably, the specific steps of real-time self-checking in the automatic test module are:

[0017] The automatic test module obtains real-time self-test data of the low-voltage leakage protector, and the real-time self-test data includes a specification parameter comparison group. The specification parameter comparison group is obtained by: obtaining the shell image information of the low-voltage leakage protector and identifying the specification parameters again based on it, recording the identified specification parameters as the specification parameter comparison group, and sending the specification parameter comparison group to the cloud platform through the communication module;

[0018] The cloud platform extracts and obtains the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector, performs fault prediction, and obtains the fault prediction coefficient. The fault prediction coefficient is used to assess the possibility that the low-voltage leakage protector that has not been used for a long time has failed.

[0019] The cloud platform compares the fault prediction index with the first threshold. If the fault prediction index exceeds the first threshold, it is determined that the low-voltage leakage protector has failed, that is, the real-time self-test has failed, and the test of the low-voltage leakage protector will not be continued; if the fault prediction index does not exceed the first threshold, it is determined that the real-time self-test has passed, and the test of the low-voltage leakage protector will continue.

[0020] Preferably, the fault prediction coefficient is obtained in the following manner:

[0021] Pre-process the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector;

[0022] Compare the preprocessed specification parameter comparison group with the standard specification data to obtain the specification parameter similarity;

[0023] Extract the standard test time interval and electrical life times of the low voltage leakage protector from the standard specification parameters;

[0024] Based on the last test time after preprocessing, the number of protection actions and specification similarity, the standard test time interval, and the number of electrical life, the fault prediction coefficient is obtained through the fault prediction coefficient calculation formula.

[0025] Preferably, the fault prediction coefficient calculation formula is:

[0026] ;

[0027] In the formula, FPC is the fault prediction coefficient, SIM is the specification similarity, is the time of the last test, is the current time, is the standard test time interval, To protect the number of actions, is the number of electrical lifespans, and sech represents the hyperbolic secant function.

[0028] Preferably, the method for obtaining the fault prediction index further includes:

[0029] If there is a safety factor corresponding to the historical test of the low-voltage leakage protector in the cloud platform, the last safety factor of the low-voltage leakage protector is obtained and included in the analysis process of the fault prediction index, that is:

[0030] Obtain the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector for preprocessing;

[0031] Obtain the last safety factor of the low voltage leakage protector;

[0032] Compare the preprocessed specification parameter comparison group with the standard specification data to obtain the specification parameter similarity;

[0033] Extract the standard test time interval and electrical life times of the low voltage leakage protector from the standard specification parameters;

[0034] Based on the last test time after preprocessing, the number of protection actions and specification similarity, the standard test time interval, the number of electrical life, and the last safety factor, the fault prediction coefficient is obtained through the fault prediction coefficient calculation formula;

[0035] The calculation formula of the fault prediction coefficient is:

[0036] ;

[0037] In the formula, FPC is the fault prediction coefficient, SIM is the specification similarity, is the time of the last test, is the current time, is the standard test time interval, To protect the number of actions, is the number of electrical life cycles, e is a natural constant, and PSF is the previous safety factor.

[0038] Preferably, the safety factor is obtained in the following manner:

[0039] Obtain aging coefficient and abnormal fluctuation coefficient;

[0040] Obtain the weights of the aging coefficient and the abnormal fluctuation coefficient for the safety factor respectively through the objective weighting method;

[0041] The safety factor is calculated by the safety factor formula according to the aging factor, the weight of the aging factor to the safety factor, the abnormal fluctuation factor, and the weight of the abnormal fluctuation factor to the safety factor;

[0042] The safety factor formula is:

[0043] ;

[0044] In the formula, PSF is the safety factor, π is the circumference of a circle, e is the natural constant, and MAC is the aging coefficient. is the weight of MAC for PSF, AVC is the abnormal fluctuation coefficient, is the weight of AVC for PSF.

[0045] Preferably, the aging coefficient is obtained in the following manner:

[0046] Obtain test data, average temperature difference before and after the test and perform preprocessing;

[0047] Extract contact resistance, action time, trigger current value, and temperature difference before and after the test from the pre-processed test data;

[0048] Extract standard contact resistance, standard operating time, and rated leakage operating current values ​​from standard specification parameters;

[0049] The aging coefficient is calculated by the aging coefficient formula;

[0050] The aging coefficient formula is:

[0051] ;

[0052] In the formula, MAC is the aging coefficient, e is the natural constant, is the contact resistance, is the standard contact resistance, is the action time, is the standard action time, is the trigger current value, is the rated leakage operating current value, To test the temperature difference before and after, is the average temperature difference before and after the test.

[0053] Preferably, the abnormal fluctuation coefficient is obtained in the following manner:

[0054] Obtain test data, average current peak value, average voltage peak value, average electromagnetic interference intensity and perform preprocessing;

[0055] Extract the current peak value, voltage peak value and electromagnetic interference intensity in the short circuit situation from the pre-processed test data;

[0056] The abnormal fluctuation coefficient is calculated by the abnormal fluctuation coefficient formula;

[0057] The formula for abnormal fluctuation coefficient is:

[0058] ;

[0059] In the formula, AVC is the abnormal fluctuation coefficient, π is the circumference of a circle, is the peak current, is the average current peak value, is the voltage peak value, is the average voltage peak value, is the electromagnetic interference intensity, is the average electromagnetic interference intensity.

[0060] A low-voltage leakage protection remote automatic test device, used to implement the above-mentioned low-voltage leakage protection remote automatic test system, including: a cloud platform for storing and processing real-time self-test data, test data, reset data, and standard specification parameters;

[0061] The low-voltage leakage protector comprises a communication module, an automatic test module and an audible and visual alarm module, which are used to obtain information of the low-voltage leakage protector, perform leakage test and reset, and also to give audible and visual alarms.

[0062] The present invention has the following advantages:

[0063] The present invention automatically and in real time detects the working status of the low-voltage leakage protector, so that the performance status of the low-voltage leakage protector can be timely identified and diagnosed without human intervention, thereby replacing manual detection with remote automatic testing, greatly improving the inspection efficiency, and effectively solving the problem of high frequency of manual testing and low inspection efficiency in the prior art.

[0064] The present invention performs a real-time self-check before testing, thereby being able to conduct a comprehensive inspection of the low-voltage leakage protector, discover potential problems in a timely manner, thereby improving the overall test efficiency and avoiding the risk of electric shock that may occur in subsequent tests.

[0065] The present invention introduces the last safety factor in the fault prediction coefficient analysis process, thereby combining historical data with the current situation, comparing and analyzing the long-term performance of the low-voltage leakage protector, identifying in advance the potential faults of the low-voltage leakage protector that has not been used for a long time or has been triggered multiple times, optimizing the maintenance and replacement cycle of the low-voltage leakage protector, reducing the occurrence of unexpected faults, and improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a schematic diagram of the structure of the system of the present invention. DETAILED DESCRIPTION

[0067] The above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0068] Example 1: Figure 1 As shown, a low-voltage leakage protection remote automatic test system includes: a cloud platform, a communication module, an automatic test module, and an audible and visual alarm module;

[0069] Cloud platform: used to obtain the duration of each test interval, send out test signals and reset signals, and also used to receive real-time self-test data, test data, reset data, and standard specification parameters of the low-voltage leakage protector, and analyze the safety level of the low-voltage leakage protector based on the real-time self-test data, test data, reset data, and standard specification parameters;

[0070] Communication module: used to obtain the test signal and reset signal sent by the cloud platform, obtain the real-time self-test data, test data and reset data sent by the automatic test module, and also used to store the standard specification parameters of the low-voltage leakage protector, and send the real-time self-test data, standard specification parameters, test data and reset data of the low-voltage leakage protector to the cloud platform;

[0071] Automatic test module: used to perform real-time self-test and obtain real-time self-test data when the test signal from the communication module is received. When the real-time self-test passes, the leakage test button is automatically turned on to obtain the test data. The leakage test button is automatically reset according to the reset signal from the communication module to obtain the reset data. It is also used to send the real-time self-test data, test data and reset data to the communication module;

[0072] Sound and light alarm module: It is used to give voice notification that the test is about to start when the test signal is received from the communication module, that is, before turning on the leakage test button. It is also used to immediately issue an sound and light alarm when the test action fails.

[0073] Through the fully automated testing process, it can effectively avoid the possible missed detection and misjudgment in traditional manual testing, and improve the detection frequency and accuracy of low-voltage leakage protectors. Through remote intelligent management of low-voltage leakage protectors, not only can the test and reset be completed automatically, but also managers can directly view the device status through the cloud platform, saving the time and cost of manual inspections and avoiding the limitations of manual testing.

[0074] The analysis process of the safety level of the low-voltage leakage protector in the cloud platform is as follows: the cloud platform analyzes the aging coefficient and the abnormal fluctuation coefficient according to the test data, reset data, and standard specification parameters of the low-voltage leakage protector, and comprehensively analyzes the safety factor based on the aging coefficient and the abnormal fluctuation coefficient, and derives the safety level of the low-voltage leakage protector based on the safety factor; the aging coefficient is used to reflect the physical and mechanical properties of the low-voltage leakage protector during long-term use; the abnormal fluctuation coefficient is used to reflect the electrical performance of the low-voltage leakage protector in the short term; the safety factor is used to reflect the safety level of the low-voltage leakage protector.

[0075] The specific steps of the real-time self-test in the automatic test module are as follows: the automatic test module obtains the real-time self-test data of the low-voltage leakage protector, the real-time self-test data includes a specification parameter comparison group, and the specification parameter comparison group is obtained by: obtaining the shell image information of the low-voltage leakage protector and identifying the specification parameters again based on it, recording the identified specification parameters as the specification parameter comparison group, and sending the specification parameter comparison group to the cloud platform through the communication module;

[0076] The cloud platform extracts and obtains the specification parameter comparison group, standard specification data, last test time, and number of protection actions of the low-voltage leakage protector, performs fault prediction, and obtains a fault prediction coefficient. The fault prediction coefficient is used to evaluate the possibility that a low-voltage leakage protector that has not been used for a long time has failed; the cloud platform compares the fault prediction index with the first threshold value. If the fault prediction index exceeds the first threshold value, it is determined that the low-voltage leakage protector has failed, that is, the real-time self-test has failed, and the test of the low-voltage leakage protector will not be continued; if the fault prediction index does not exceed the first threshold value, it is determined that the real-time self-test has passed, and the test of the low-voltage leakage protector will continue.

[0077] Intelligently acquiring specification parameters through image recognition of the device shell reduces the complexity of manual data input and improves the degree of automation of the self-test process, thereby saving manpower and improving the accuracy of data collection. The fault prediction coefficient is used to evaluate the possibility of potential failure of the device due to long-term disuse, and judge whether the device status is suitable for the next test based on the preset first threshold. This automatically analyzes the failure risk of the device when it has not been used for a long time, avoids unnecessary leakage tests, reduces safety hazards caused by long-term disuse of the equipment, and improves detection efficiency and safety.

[0078] Among them, in the shell image recognition of low-voltage leakage protector, the intelligent way to obtain specification parameters includes: optical character recognition (OCR), barcode / QR code recognition, RFID / NFC tag recognition, etc. The first threshold and historical self-test data, test data, reset data, standard specification parameters, etc. are all stored in the cloud platform.

[0079] The fault prediction coefficient is obtained in the following way: preprocessing the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector; performing similarity comparison between the preprocessed specification parameter comparison group and the standard specification data to obtain the specification parameter similarity; extracting the standard test time interval and electrical life times of the low-voltage leakage protector from the standard specification parameters; and obtaining the fault prediction coefficient through the fault prediction coefficient calculation formula based on the last test time, protection action times, specification similarity, standard test time interval, and electrical life times after preprocessing.

[0080] Similarity comparison can reflect whether the low-voltage leakage protector deviates from the standard specifications. If the deviation is large, it may indicate the possibility of equipment performance degradation or potential failure. The standard test interval reflects the recommended inspection frequency of the equipment, while the electrical life number indicates the expected number of protection times of the equipment under rated conditions.

[0081] Once the fault prediction coefficient exceeds the preset first threshold, the system will determine that the device may have failed, and can trigger a real-time alarm or stop testing the low-voltage leakage protector to avoid the risk of electric shock.

[0082] The calculation formula of the fault prediction coefficient is:

[0083] ;

[0084] In the formula, FPC is the fault prediction coefficient, SIM is the specification similarity, is the time of the last test, is the current time, is the standard test time interval, To protect the number of actions, is the number of electrical lifespans, and sech represents the hyperbolic secant function.

[0085] An example is, SIM=0.8, sky, sky, Second-rate, The fault prediction coefficient FPC=0.299 is obtained, and the first threshold is 0.8, which means that testing is required. When this system is connected to each low-voltage leakage protector for remote control testing, the previous records are empty or not recorded. Therefore, when encountering a low-voltage leakage protector without the last test record, check it as much as possible.

[0086] The method of obtaining the fault prediction index also includes: if there is a safety factor of the low-voltage leakage protector corresponding to the historical test in the cloud platform, then the last safety factor of the low-voltage leakage protector is obtained and included in the analysis process of the fault prediction index, that is, obtaining the specification parameter comparison group, standard specification data, last test time, and number of protection actions of the low-voltage leakage protector for preprocessing; obtaining the last safety factor of the low-voltage leakage protector; performing a similarity comparison between the preprocessed specification parameter comparison group and the standard specification data to obtain the specification parameter similarity; extracting the standard test time interval and electrical life number of the low-voltage leakage protector from the standard specification parameters;

[0087] Based on the last test time after preprocessing, the number of protection actions and specification similarity, the standard test time interval, the number of electrical life, and the last safety factor, the fault prediction coefficient is obtained through the fault prediction coefficient calculation formula; at this time, the fault prediction coefficient calculation formula is:

[0088] ;

[0089] Where e is a natural constant and PSF is the previous safety factor.

[0090] An example is, PSF=0.557, SIM=0.8, sky, sky, Second-rate, times. The fault prediction coefficient FPC=0.438 is obtained, and the first threshold is 0.8, so the test is continued. After this system connects to each low-voltage leakage protector for remote control testing, when encountering a low-voltage leakage protector with a record of the last inspection, it should be determined whether the current test is necessary based on the safety factor obtained from the last test. If the last safety factor is relatively low, it means that the low-voltage leakage protector may be damaged. In order to avoid accidental electric shock during testing, testing should be avoided as much as possible.

[0091] By comparing the last safety factor with the current safety factor, the system can observe the changing trend of the equipment status. If the safety factor continues to decrease, it means that the equipment status is gradually deteriorating, and attention or maintenance measures need to be taken in advance. If the current safety factor is significantly lower than the last time, it may indicate that the equipment status has deteriorated, which also helps to identify potential failure risks in advance.

[0092] The method of obtaining the safety factor is as follows: obtaining the aging factor and the abnormal fluctuation coefficient; obtaining the weights of the aging factor and the abnormal fluctuation coefficient for the safety factor respectively through the objective weighting method; calculating the safety factor through the safety factor formula according to the aging factor, the weight of the aging factor for the safety factor, the abnormal fluctuation coefficient, and the weight of the abnormal fluctuation coefficient for the safety factor; the safety factor formula is:

[0093] ;

[0094] In the formula, PSF is the safety factor, π is the circumference of a circle, and MAC is the aging coefficient. is the weight of MAC for PSF, AVC is the abnormal fluctuation coefficient, is the weight of AVC for PSF.

[0095] An example is, MAC=0.661, AVC=0.475, , , the safety factor PSF = 0.557 is obtained. If the safety factor is not greater than 1, it means that there is a certain degree of aging or abnormal fluctuation. If it is greater than 1, it means that the low-voltage leakage protector is in good safety condition. The greater it is than 1, the better the safety level.

[0096] By regularly monitoring changes in safety factors, the cloud platform can also intelligently adjust the maintenance cycle of the low-voltage leakage protector to avoid excessive or delayed maintenance, thereby reducing maintenance costs and increasing the service life of the low-voltage leakage protector.

[0097] The aging coefficient is obtained by: obtaining the test data, the average temperature difference before and after the test and performing preprocessing; extracting the contact resistance, action time, trigger current value, and the temperature difference before and after the test from the preprocessed test data; extracting the standard contact resistance, standard action time, and rated leakage action current value from the standard specification parameters; and calculating the aging coefficient through the aging coefficient formula; the aging coefficient formula is:

[0098] ;

[0099] Where MAC is the aging coefficient, is the contact resistance, is the standard contact resistance, is the action time, is the standard action time, is the trigger current value, is the rated leakage operating current value, To test the temperature difference before and after, is the average temperature difference before and after the test.

[0100] An example is, Microohm, Microohm, , , , , Celsius, Celsius, the aging coefficient MAC=0.661. When the aging coefficient is greater than 0.5, it means that the low-voltage leakage protector has been aged. The closer the aging coefficient is to 1, the more serious the aging of the mechanical performance. The aging coefficient reflects whether the low-voltage leakage protector has mechanical wear problems during long-term use. Ensuring preventive maintenance before serious wear can reduce the frequency of manual inspections and manual judgment errors, improve maintenance efficiency, and prevent hidden dangers caused by aging, ensuring that the low-voltage leakage protector maintains good protection functions in the long term.

[0101] The increase in contact resistance means that the low-voltage leakage protector is aging, because contact wear and oxidation will cause resistance to increase. Wear of mechanical parts will cause action delays, so the action time may become longer with aging. After the low-voltage leakage protector ages, the trigger current value may deviate from the rated leakage action current value.

[0102] The abnormal fluctuation coefficient is obtained by: obtaining test data, average current peak value, average voltage peak value, average electromagnetic interference intensity and preprocessing; extracting the current peak value, voltage peak value, and electromagnetic interference intensity in the short circuit situation from the preprocessed test data; calculating the abnormal fluctuation coefficient by the abnormal fluctuation coefficient formula; the abnormal fluctuation coefficient formula is:

[0103] ;

[0104] In the formula, AVC is the abnormal fluctuation coefficient, π is the circumference of a circle, is the peak current, is the average current peak value, is the voltage peak value, is the average voltage peak value, is the electromagnetic interference intensity, is the average electromagnetic interference intensity.

[0105] An example is, , , , , , , and the abnormal fluctuation coefficient AVC=0.475 is obtained. When the abnormal fluctuation coefficient is higher than 0.5, it means that there is a large fluctuation, otherwise it means that the fluctuation is close to the average value. The closer the abnormal fluctuation coefficient is to 1, the more serious the abnormal fluctuation of electrical performance under short-circuit state. The abnormal fluctuation coefficient can sensitively capture the short-term abnormal behavior of the low-voltage leakage protector, prevent sudden short-term electrical failures, especially electrical anomalies caused by factors such as changes in the external environment, avoid the expansion of electrical failures, and ensure the safety of the low-voltage leakage protector. Among them, a higher current peak indicates that the low-voltage leakage protector has potential overload or short-circuit problems, and a larger voltage fluctuation will reduce the electrical performance of the low-voltage leakage protector. Excessive electromagnetic interference may cause the low-voltage leakage protector to fail or unstable performance, especially when it fluctuates violently in a short period of time.

[0106] Embodiment 2: The present invention provides a low-voltage leakage protection remote automatic test device, which is used to implement a low-voltage leakage protection remote automatic test system in Embodiment 1, including: a cloud platform, which is used to store and process real-time self-test data, test data, reset data, and standard specification parameters;

[0107] The low-voltage leakage protector comprises a communication module, an automatic test module and an audible and visual alarm module, which are used to obtain information of the low-voltage leakage protector, perform leakage test and reset, and also to give audible and visual alarms.

[0108] The low-voltage leakage protector adopts the principle of non-self-holding electromagnet. When powered on, the moving shaft of the electromagnet replaces the manual pressing of the "once a month" test button to achieve automatic testing. After pressing the leakage test button, the reset button will pop up. Similarly, another electromagnet presses the reset button to achieve automatic reset. The power supply of this device is taken from the power supply side of the leakage protection switch. The live wire and the neutral wire need to be taken separately by puncture technology (or the magnetic suction principle is used to take power at the nut on the power supply side of the switch). When taking power, the conditions for live operation are met (power can also be cut off).

Claims

1. A low voltage leakage protection remote automatic test system, characterized in that: include: Cloud platform, communication module, automatic test module, sound and light alarm module; Cloud platform: used to obtain the duration of each test interval, send out test signals and reset signals, and also used to receive real-time self-test data, test data, reset data, and standard specification parameters of the low-voltage leakage protector, and analyze the safety level of the low-voltage leakage protector based on the real-time self-test data, test data, reset data, and standard specification parameters; Communication module: used to obtain the test signal and reset signal sent by the cloud platform, obtain the real-time self-test data, test data and reset data sent by the automatic test module, and also used to store the standard specification parameters of the low-voltage leakage protector, and send the real-time self-test data, standard specification parameters, test data and reset data of the low-voltage leakage protector to the cloud platform; Automatic test module: used to perform real-time self-test and obtain real-time self-test data when the test signal from the communication module is received. When the real-time self-test passes, the leakage test button is automatically turned on to obtain the test data. The leakage test button is automatically reset according to the reset signal from the communication module to obtain the reset data. It is also used to send the real-time self-test data, test data and reset data to the communication module; Sound and light alarm module: used to notify the test is about to start when receiving the test signal from the communication module, that is, before turning on the leakage test button, and also used to immediately issue a sound and light alarm when the test action fails; The analysis process of the safety level of low-voltage leakage protectors in the cloud platform is as follows: The cloud platform analyzes the aging coefficient and abnormal fluctuation coefficient based on the test data, reset data, and standard specification parameters of the low-voltage leakage protector, and comprehensively analyzes the safety factor based on the aging coefficient and the abnormal fluctuation coefficient, and obtains the safety degree of the low-voltage leakage protector based on the safety factor; The aging coefficient is used to reflect the physical and mechanical properties of the low-voltage leakage protector during long-term use; The abnormal fluctuation coefficient is used to reflect the short-term electrical performance of the low-voltage leakage protector; The safety factor is used to reflect the safety level of the low-voltage leakage protector; The safety factor is obtained as follows: Obtain aging coefficient and abnormal fluctuation coefficient; Obtain the weights of the aging coefficient and the abnormal fluctuation coefficient for the safety factor respectively through the objective weighting method; The safety factor is calculated by the safety factor formula according to the aging factor, the weight of the aging factor to the safety factor, the abnormal fluctuation factor, and the weight of the abnormal fluctuation factor to the safety factor; The safety factor formula is: ； In the formula, PSF is the safety factor, π is the circumference of a circle, e is the natural constant, and MAC is the aging coefficient. is the weight of MAC for PSF, AVC is the abnormal fluctuation coefficient, is the weight of AVC for PSF; The aging coefficient is obtained as follows: Obtain test data, average temperature difference before and after the test and perform preprocessing; Extract contact resistance, action time, trigger current value, and temperature difference before and after the test from the pre-processed test data; Extract standard contact resistance, standard operating time, and rated leakage operating current values ​​from standard specification parameters; The aging coefficient is calculated by the aging coefficient formula; The aging coefficient formula is: ； In the formula, MAC is the aging coefficient, e is the natural constant, is the contact resistance, is the standard contact resistance, is the action time, is the standard action time, is the trigger current value, is the rated leakage operating current value, To test the temperature difference before and after, is the average temperature difference before and after the test; The abnormal fluctuation coefficient is obtained as follows: Obtain test data, average current peak value, average voltage peak value, average electromagnetic interference intensity and perform preprocessing; Extract the current peak value, voltage peak value and electromagnetic interference intensity in the short circuit situation from the pre-processed test data; The abnormal fluctuation coefficient is calculated by the abnormal fluctuation coefficient formula; The formula for abnormal fluctuation coefficient is: ； In the formula, AVC is the abnormal fluctuation coefficient, π is the circumference of a circle, is the peak current, is the average current peak value, is the voltage peak value, is the average voltage peak value, is the electromagnetic interference intensity, is the average electromagnetic interference intensity.

2. A low voltage leakage protection remote automatic test system as claimed in claim 1, characterized in that: The specific steps of real-time self-check in the automatic test module are: The automatic test module obtains real-time self-test data of the low-voltage leakage protector, and the real-time self-test data includes a specification parameter comparison group. The specification parameter comparison group is obtained by: obtaining the shell image information of the low-voltage leakage protector and identifying the specification parameters again based on it, recording the identified specification parameters as the specification parameter comparison group, and sending the specification parameter comparison group to the cloud platform through the communication module; The cloud platform extracts and obtains the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector, performs fault prediction, and obtains the fault prediction coefficient. The fault prediction coefficient is used to assess the possibility that the low-voltage leakage protector that has not been used for a long time has failed. The cloud platform compares the fault prediction index with the first threshold. If the fault prediction index exceeds the first threshold, it is determined that the low-voltage leakage protector has failed, that is, the real-time self-test has failed, and the test of the low-voltage leakage protector will not be continued; if the fault prediction index does not exceed the first threshold, it is determined that the real-time self-test has passed, and the test of the low-voltage leakage protector will continue.

3. A low voltage leakage protection remote automatic test system as claimed in claim 2, characterized in that: The fault prediction coefficient is obtained as follows: Pre-process the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector; Compare the preprocessed specification parameter comparison group with the standard specification data to obtain the specification parameter similarity; Extract the standard test time interval and electrical life times of the low voltage leakage protector from the standard specification parameters; Based on the last test time after preprocessing, the number of protection actions and specification similarity, the standard test time interval, and the number of electrical life, the fault prediction coefficient is obtained through the fault prediction coefficient calculation formula.

4. A low voltage leakage protection remote automatic test system as claimed in claim 3, characterized in that: The fault prediction coefficient calculation formula is: ； In the formula, FPC is the fault prediction coefficient, SIM is the specification similarity, is the time of the last test, is the current time, is the standard test time interval, To protect the number of actions, is the number of electrical lifespans, and sech represents the hyperbolic secant function.

5. A low voltage leakage protection remote automatic test system as claimed in claim 2, characterized in that: The method for obtaining the fault prediction index also includes: If there is a safety factor corresponding to the historical test of the low-voltage leakage protector in the cloud platform, the last safety factor of the low-voltage leakage protector is obtained and included in the analysis process of the fault prediction index, that is: Obtain the specification parameter comparison group, standard specification data, last test time, and protection action times of the low-voltage leakage protector for preprocessing; Obtain the last safety factor of the low voltage leakage protector; Compare the preprocessed specification parameter comparison group with the standard specification data to obtain the specification parameter similarity; Extract the standard test time interval and electrical life times of the low voltage leakage protector from the standard specification parameters; Based on the last test time after preprocessing, the number of protection actions and specification similarity, the standard test time interval, the number of electrical life, and the last safety factor, the fault prediction coefficient is obtained through the fault prediction coefficient calculation formula; The calculation formula of the fault prediction coefficient is: ； In the formula, FPC is the fault prediction coefficient, SIM is the specification similarity, is the time of the last test, is the current time, is the standard test time interval, To protect the number of actions, is the number of electrical life, e is a natural constant, PSF is the last safety factor, and sech represents the hyperbolic secant function.

6. A low-voltage leakage protection remote automatic test device, used to implement a low-voltage leakage protection remote automatic test system as claimed in any one of claims 1 to 5, characterized in that: Includes: Cloud platform for storing and processing real-time self-test data, test data, reset data, and standard specification parameters; The low-voltage leakage protector comprises a communication module, an automatic test module and an audible and visual alarm module, which are used to obtain information of the low-voltage leakage protector, perform leakage test and reset, and also to give audible and visual alarms.

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