A method, device, electronic device and storage medium for monitoring performance of molded case circuit breaker

Abstract

The present invention discloses a method for monitoring the performance of a molded case circuit breaker, comprising the following steps: obtaining the corresponding closing and opening time, tripping and opening time, and tripping and opening time point; determining the shape of a relationship curve characterizing the relationship between the tripping speed and the tripping and opening time point; determining the slope corresponding to each tripping and opening time point; determining the number of tripping times and the tripping frequency within a preset period; determining a consumption coefficient function; determining the total tripping consumption according to the consumption coefficient function; determining a performance attenuation coefficient; and determining a comprehensive health status level of the molded case circuit breaker. The present invention determines the comprehensive health status level of the molded case circuit breaker based on the acquired relevant data, so that the user can give an early warning of the circuit breaker usage and accurately locate problems, perform precise maintenance on the molded case circuit breaker, and enhance the safety of use and the safety of the entire circuit system. The present invention also discloses a device, an electronic device, and a computer-readable storage medium for implementing the above method.

Description

Technical Field

[0001] The present invention relates to the technical field of molded case circuit breakers, and in particular to a method, device, electronic equipment and storage medium for monitoring the performance of a molded case circuit breaker. Background Art

[0002] Molded case circuit breakers, also known as device-type circuit breakers, are a commonly used low-voltage electrical equipment. Their shell is mainly made of insulating materials such as plastic, and contains key components such as contact systems, arc extinguishing devices, operating mechanisms, and releases. The main function of molded case circuit breakers is to protect circuits from overload, short circuit, and undervoltage. They can automatically cut off faulty circuits to prevent accidents from expanding and ensure the safe operation of electrical systems.

[0003] Molded case circuit breakers have the characteristics of compact structure, small size, light weight, serialization, high degree of modularization, and easy installation. They are widely used in power distribution systems in industrial, commercial and civil buildings to control and protect power lines and motors.

[0004] Molded case circuit breakers have closing, tripping and re-tripping positions. Closing position: the moving and static contacts of the product are in contact, and the current can be carried normally at this time. Tripping position: the position after the product protectively trips when there is a fault current in the system. Re-tripping position: the position that the product must pass when it needs to be closed again. This position is to empower the internal mechanisms of the product. In the case of tripping caused by fault current, it will cause erosion of the moving and static contacts inside the circuit breaker, affecting the performance and life of the circuit breaker. However, this burning situation cannot be identified from the appearance, resulting in the inability to perform accurate maintenance during maintenance, resulting in the risk of power outages and safety hazards during the use of the entire box transformer. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a method, device, electronic device and storage medium for monitoring the performance of a molded case circuit breaker. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] A first aspect of an embodiment of the present invention provides a method for monitoring performance of a molded case circuit breaker, comprising the following steps:

[0007] In response to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, the corresponding closing and disconnecting time, the tripping and opening time and the tripping and opening time point are respectively obtained; wherein the disconnection signal and the opening signal are generated by a position sensor arranged at the handle;

[0008] Determine the shape of a relationship curve representing the relationship between the tripping speed and the tripping opening time point according to the preset moving distance of the handle, the closing and opening time, the tripping opening time and the tripping opening time point;

[0009] Determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve;

[0010] Determine the number of trips within a preset period based on the tripping and opening time point;

[0011] Determine a tripping frequency according to the number of tripping times and the preset period;

[0012] Determine a consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times;

[0013] Determine the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times;

[0014] Determine a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption;

[0015] The comprehensive health status level of the molded case circuit breaker is determined according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient.

[0016] In one embodiment of the present invention, the determining of the consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times includes:

[0017] Fitting each of the tripping speeds with the tripping opening time point to obtain a first consumption coefficient function;

[0018] Fitting each of the preset cycles with the corresponding number of tripping times to obtain a second consumption coefficient function;

[0019] Determining the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times includes:

[0020] The total opening consumption is determined according to the first consumption coefficient function, the second consumption coefficient function, a standard consumption value, the tripping speed and the number of tripping times.

[0021] In one embodiment of the present invention, the method further comprises:

[0022] In response to a trip trigger signal, start recording a trigger maintenance time;

[0023] When the triggering maintenance time is greater than the preset time threshold, it is determined that the tripping triggering signal is a tripping signal.

[0024] In one embodiment of the present invention, determining the performance attenuation coefficient according to the slope, the tripping frequency, the tripping times and the total opening consumption includes:

[0025] According to the slope, determining a first breaking performance attenuation coefficient, a first insulation performance attenuation coefficient and a first load-bearing performance attenuation coefficient;

[0026] Determining a second breaking performance attenuation coefficient, a second insulation performance attenuation coefficient, and a second load-bearing performance attenuation coefficient according to the tripping frequency;

[0027] Determining a third breaking performance attenuation coefficient, a third insulation performance attenuation coefficient, and a third load-bearing performance attenuation coefficient according to the number of tripping times;

[0028] According to the total opening consumption, a fourth breaking performance attenuation coefficient, a fourth insulation performance attenuation coefficient and a fourth load-bearing performance attenuation coefficient are determined.

[0029] In one embodiment of the present invention, the first breaking performance attenuation coefficient is less than the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient, and the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient are equal;

[0030] The second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are less than the second insulation performance attenuation coefficient; the second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are equal;

[0031] The third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are equal;

[0032] The fourth breaking performance attenuation coefficient is greater than the fourth insulation performance attenuation coefficient, and the fourth insulation performance attenuation coefficient is greater than the fourth load-bearing performance attenuation coefficient;

[0033] The first breaking performance attenuation coefficient is smaller than the third breaking performance attenuation coefficient, the third breaking performance attenuation coefficient is equal to the fourth breaking performance attenuation coefficient; the third breaking performance attenuation coefficient is smaller than the second breaking performance attenuation coefficient;

[0034] The third insulation performance attenuation coefficient is smaller than the fourth insulation performance attenuation coefficient, the fourth insulation performance attenuation coefficient is smaller than the second insulation performance attenuation coefficient, and the second insulation performance attenuation coefficient is equal to the first insulation performance attenuation coefficient;

[0035] The third bearing performance attenuation coefficient is smaller than the second bearing performance attenuation coefficient, the second bearing performance attenuation coefficient is smaller than the fourth bearing performance attenuation coefficient, and the fourth bearing performance attenuation coefficient is smaller than the first bearing performance attenuation coefficient.

[0036] In one embodiment of the present invention, determining the comprehensive health status level of the molded case circuit breaker according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient includes:

[0037] Determining a first health status level according to the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient;

[0038] determining a second health status level according to the second breaking performance attenuation coefficient, the second insulation performance attenuation coefficient, and the second load-bearing performance attenuation coefficient;

[0039] Determining a third health status level according to the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient;

[0040] determining a fourth health status level according to the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient, and the fourth load-bearing performance attenuation coefficient;

[0041] The comprehensive health status level of the molded case circuit breaker is determined based on the first health status level, the second health status level, the third health status level, the fourth health status level, the average tripping speed, the corresponding tripping frequency, the corresponding number of tripping times, and the corresponding total tripping consumption.

[0042] In one embodiment of the present invention, the calculation formula of the first health status level K1 is:

[0043]

[0044] The calculation formula of the second health status level K2 is:

[0045]

[0046] The calculation formula of the third health status level K3 is:

[0047]

[0048] The calculation formula of the fourth health status level K4 is:

[0049]

[0050] A second aspect of an embodiment of the present invention provides a molded case circuit breaker performance monitoring device, comprising:

[0051] An acquisition module, for responding to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, respectively acquiring the corresponding closing and disconnecting time, the tripping and opening time and the tripping and opening time point; wherein the disconnection signal and the opening signal are generated by a position sensor arranged at the handle;

[0052] A first determination module is used to determine the shape of a relationship curve representing the relationship between the tripping speed and the tripping opening time point according to a preset moving distance of the handle, the closing and opening time, the tripping opening time and the tripping opening time point;

[0053] A second determination module is used to determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve;

[0054] A third determination module is used to determine the number of tripping times within a preset period according to the tripping opening time point;

[0055] A fourth determination module, used to determine a tripping frequency according to the number of tripping times and the preset period;

[0056] A fifth determination module, configured to determine a consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times;

[0057] A sixth determination module, configured to determine a total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times;

[0058] A seventh determination module, configured to determine a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption;

[0059] The eighth determination module is used to determine the comprehensive health status level of the molded case circuit breaker according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient.

[0060] A third aspect of an embodiment of the present invention provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a molded case circuit breaker performance monitoring method provided in the first aspect of an embodiment of the present invention is implemented.

[0061] A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for monitoring the performance of a molded case circuit breaker provided by the first aspect of an embodiment of the present invention is implemented.

[0062] Beneficial effects of the present invention:

[0063] The present invention obtains corresponding data according to the disconnection signal of the closing position and the opening signal of the corresponding tripping position, and obtains the tripping speed, tripping frequency, tripping times, and total opening consumption according to these data, so as to determine the comprehensive health status level of the molded case circuit breaker, so that the user can give early warning and accurately locate the problem of the circuit breaker use according to the comprehensive health status level and related data, and accurately maintain the molded case circuit breaker, thereby enhancing the safety of use and the safety of the entire circuit system. At the same time, it provides data support for the stability analysis of the circuit system.

[0064] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0065] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0067] Figure 1 A schematic flow chart of a method for monitoring performance of a molded case circuit breaker provided by an embodiment of the present invention;

[0068] Figure 2 A block diagram of a molded case circuit breaker performance monitoring device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0069] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0070] like Figure 1 As shown, a first aspect of an embodiment of the present invention provides a method for monitoring performance of a molded case circuit breaker, comprising the following steps:

[0071] Step 11, in response to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, respectively obtain the corresponding closing and disconnecting time, tripping and opening time and tripping and opening time point.

[0072] The disconnection signal and the opening signal are generated by a position sensor arranged at the handle.

[0073] When the disconnection signal of the closing position and the opening signal of the tripping position are generated, the closing disconnection time T1 and the tripping opening time T2 are respectively measured, and the tripping opening time point T of the opening signal is recorded. The tripping opening time point is in the date format or the date + time format. The disconnection signal of the closing position is the signal when the conduction signal of the closing position is disconnected.

[0074] Step 12, determining the shape of a relationship curve representing the relationship between the tripping speed and the tripping time point according to the preset movement distance of the handle, the closing and opening time, the tripping time and the tripping time point.

[0075] In this step, the preset moving distance of the handle is a fixed value of the mechanical structure. Here, the preset moving distance of the handle is the distance L that the handle moves from the closing position to the tripping position. Therefore, the tripping speed Vt=L / (T2-T1). The data of the tripping time point that generates the tripping signal within a period of time and the corresponding tripping speed are marked in a coordinate system with the tripping time point as the horizontal coordinate and the tripping speed as the vertical coordinate, and are connected in sequence to form a relationship curve.

[0076] Step 13: determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve.

[0077] In this step, a tangent is drawn at each data point on the relationship curve, and the slope of each tangent is calculated. Here, as the molded case circuit breaker wears out, the tripping speed becomes slower and slower. The larger the slope, the greater the drop in the tripping speed, which means that the circuit breaker moves from the normal closing position to the tripping position due to a fault, that is, the opening time of the opening phenomenon becomes longer.

[0078] Step 14, determining the number of trips according to the tripping and opening time point. In this step, recording a tripping and opening time point indicates that a trip (opening) has occurred, and the number of trips that occurred can be obtained based on the recorded tripping and opening time point. For example, if the data for one month or three months is recorded, the number of trips for one month or three months can be obtained.

[0079] Step 15, determining the tripping frequency according to the number of tripping times and the preset period. In this step, within the time range of the previous step, the tripping frequency in any period or time period can be calculated, such as the tripping frequency of a preset period of one week, 10 days, or 30 days. Specifically, the tripping frequency of the preset period is calculated as the ratio of the number of tripping times in the preset period to the preset period.

[0080] Step 16, determining a consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times. Specifically, fitting each tripping speed with the tripping opening time point to obtain a first consumption coefficient function. Fitting each preset cycle with the corresponding number of tripping times to obtain a second consumption coefficient function.

[0081] Step 17, determining the total opening switch consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times. Specifically, determining the total opening switch consumption according to the first consumption coefficient function, the second consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times.

[0082] For example, the mechanical life of the circuit breaker is Nc. In the absence of fault current, the consumption of the circuit breaker opening once is 1 / Nc (standard consumption value). However, due to the influence of arc erosion and metal particles during the tripping fault, as well as the uncertainty of the current size at that time, the consumption coefficient is determined based on the consumption coefficient function, tripping speed, tripping times and other data. The consumption of one opening is: consumption coefficient × (1 / Nc), which can more accurately reflect the consumption of the opening, thereby providing more accurate data support for the subsequent calculation of the comprehensive health status level. The total opening consumption is the sum of the opening consumption within the required cycle.

[0083] Step 18, determining the performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total tripping consumption.

[0084] Step 19, determining the comprehensive health status level of the molded case circuit breaker according to the tripping speed, tripping frequency, tripping times, total tripping consumption and performance attenuation coefficient.

[0085] In this embodiment, the corresponding closing and disconnecting time, tripping and opening time and tripping and opening time point are obtained according to the disconnection signal of the closing position and the opening signal of the corresponding tripping position. The tripping speed, tripping frequency, tripping times and total opening consumption can be calculated according to these data, so as to determine the comprehensive health status level of the molded case circuit breaker, so that the user can give early warning and accurately locate the problem of circuit breaker use according to the comprehensive health status level and related data, and accurately maintain and monitor the molded case circuit breaker, thereby enhancing the safety of use and the safety of the entire circuit system. At the same time, it provides data support for the stability analysis of the circuit system.

[0086] A second aspect of an embodiment of the present invention provides a method for monitoring performance of a molded case circuit breaker, comprising the following steps:

[0087] Step 201: In response to a tripping trigger signal, start recording the duration of the tripping trigger signal.

[0088] Step 202: When the triggering maintenance time is greater than the preset time threshold and the conduction signal of the closing position and the conduction signal of the re-locking position are not detected, it is determined that the tripping triggering signal is an opening signal.

[0089] It should be noted that the handle can be manually pulled from the closing position through the tripping position to the re-arresting position, so whether the handle has passed the tripping position cannot be judged only by whether it has passed the tripping position. In order to more accurately distinguish whether the tripping trigger signal is generated by manual maintenance operations or field faults, certain conditions are used to determine whether the tripping trigger signal is an opening signal or a tripping trigger signal generated when the handle is manually pulled from the closing position through the tripping position to the re-arresting position. When the handle moves to the closing, tripping and re-arresting positions, the position sensor will generate corresponding different signals according to the corresponding three different positions.

[0090] For example, the preset time threshold is 3s. When the position sensor at the handle generates a tripping trigger signal, the timing starts and the time t that the tripping trigger signal is maintained is recorded. When t>3s and there is no conduction signal feedback in the closing position or the re-decoupling position, the tripping trigger signal is judged as an opening signal. If t<3s and there is a conduction signal feedback in the closing position or the re-decoupling position, it is judged as not an opening signal.

[0091] Step 203, in response to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, respectively obtain the corresponding closing and opening time, tripping and opening time and tripping and opening time point.

[0092] The disconnection signal and the opening signal are generated by a position sensor arranged at the handle.

[0093] When the disconnection signal of the closing position and the opening signal of the tripping position are generated, the closing disconnection time T1 and the tripping opening time T2 are respectively measured, and the tripping opening time point T of the opening signal is recorded. The tripping opening time point is in the date format or the date + time format. The disconnection signal of the closing position is the signal when the conduction signal of the closing position is disconnected.

[0094] Step 204, determining the shape of a relationship curve representing the relationship between the tripping speed and the tripping time point according to the preset moving distance of the handle, the closing and opening time, the tripping time and the tripping time point.

[0095] In this step, the preset moving distance of the handle is a fixed value of the mechanical structure. Here, the preset moving distance of the handle is the distance L that the handle moves from the closing position to the tripping position. Therefore, the tripping speed Vt=L / (T2-T1). The data of the tripping time point that generates the tripping signal within a period of time and the corresponding tripping speed are marked in a coordinate system with the tripping time point as the horizontal coordinate and the tripping speed as the vertical coordinate, and are connected in sequence to form a relationship curve to obtain the shape of the relationship curve.

[0096] Step 205, determining the slope corresponding to each tripping and opening time point according to the shape of the relationship curve.

[0097] In this step, a tangent is drawn at each data point on the relationship curve, and the slope of each tangent is calculated. Here, as the molded case circuit breaker wears out, the tripping speed becomes slower and slower. The larger the slope, the greater the drop in the tripping speed. This means that the time it takes for the circuit breaker to go from the normal closing position to the handle moving to the tripping position due to a fault, that is, the tripping phenomenon, becomes longer. The tripping time is directly related to the product's breaking capacity, providing data support for breaking performance analysis.

[0098] Step 206, determine the number of trips within a preset period according to the tripping and opening time point. In this step, recording a tripping and opening time point indicates that a trip (opening) has occurred, and the tripping that occurred can be determined based on the recorded tripping and opening time point. The number of trips can be obtained by integrating the time records for a period of time. For example, based on the tripping and opening time point data recorded for one week, 10 days, and 30 days, the number of trips Nt for one week, 10 days, and 30 days can be obtained. If the circuit breaker has no faults, the opening phenomenon generally does not occur. If it trips within the set time period, it means that there are unstable factors in the circuit.

[0099] In one embodiment, when the number of tripping times within a preset period is greater than a threshold number, a first alarm message is generated to provide a fault warning to the user and provide reference information for subsequent troubleshooting of system faults.

[0100] Step 207, determining the tripping frequency according to the number of tripping times and the preset period. In this step, within the time range of the previous step, the tripping frequency in any period or time period can be calculated, such as the tripping frequency of a preset period of one week, 10 days, or 30 days. Specifically, the tripping frequency of the preset period is calculated as the ratio of the number of tripping times in the preset period to the preset period.

[0101] In one embodiment, when the tripping frequency of a preset period is greater than a frequency threshold, a second alarm message is generated to provide a fault warning to the user and provide reference information for subsequent troubleshooting of system faults.

[0102] Step 208, determine the consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times. Specifically, fit each tripping speed with the tripping opening time point to obtain a first consumption coefficient function. Fit each preset cycle with the corresponding number of tripping times to obtain a second consumption coefficient function.

[0103] In this step, the least square method can be used to fit these data to obtain the first consumption coefficient function and the second consumption coefficient function.

[0104] Step 209, determining the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times. Specifically, determining the total opening consumption according to the first consumption coefficient function, the second consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times.

[0105] For example, the mechanical life of the product is Nc. In the absence of fault current, the consumption of the product opening once is 1 / Nc (standard consumption value). However, due to the influence of arc erosion and metal particles during the tripping fault, as well as the uncertainty of the current magnitude at that time, the first consumption coefficient f(Vz) is determined according to the tripping speed Vz closest to the current time and the first consumption coefficient function f(Vt), and the second consumption coefficient f(N) is determined according to the currently counted tripping times N and the second consumption function f(Nt). The consumption of one opening is: f(Vz)×f(N)×(1 / Nc), which can more accurately reflect the consumption of the opening, thereby providing more accurate data support for the subsequent calculation of the comprehensive health status level. The sum of the consumption of each opening trip within the required period is the total opening consumption.

[0106] Among them, when the total trip consumption within the cycle is higher than the set value, a third alarm message is generated, indicating that the circuit breaker can no longer complete the next tripping task and needs maintenance or replacement.

[0107] Step 210, determining the performance attenuation coefficient according to the slope, tripping frequency, tripping times and total tripping consumption. Specifically, different influencing factors have different effects on the performance of the circuit breaker, so different influencing factors have different performance attenuation coefficients, and the performance attenuation coefficient is a preset value. The specific steps of determining the performance attenuation coefficient according to the slope, tripping frequency, tripping times and total tripping consumption include:

[0108] According to the slope, the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient are determined. Specifically, when the average slope in the cycle is greater than the slope threshold or the average speed is less than the speed threshold, the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient are determined.

[0109] According to the tripping frequency, the second breaking performance attenuation coefficient, the second insulation performance attenuation coefficient and the second load-bearing performance attenuation coefficient are determined. Specifically, when the tripping frequency in the cycle is greater than the frequency threshold, the second breaking performance attenuation coefficient, the second insulation performance attenuation coefficient and the second load-bearing performance attenuation coefficient are determined.

[0110] According to the number of tripping times, the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are determined. Specifically, when the number of tripping times in a cycle is greater than the number threshold, the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are determined.

[0111] According to the total opening consumption, the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient and the fourth load-bearing performance attenuation coefficient are determined. Specifically, when the total opening consumption in the cycle is greater than the consumption threshold, the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient and the fourth load-bearing performance attenuation coefficient are determined.

[0112] In this step, the slope, tripping frequency, number of trippings, and total switch consumption can be set to correspond to different performance attenuation coefficients in relation to the threshold value. These data can be stored in a table, and the corresponding data can be found in the table later. When determining the performance attenuation coefficient, the data within the same time range is targeted, that is, the slope, tripping frequency, number of trippings, and total switch consumption within the same cycle.

[0113] In one embodiment, the above threshold may include multiple intervals, and different intervals correspond to different performance attenuation coefficients.

[0114] Among them, the first breaking performance attenuation coefficient is smaller than the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient, and the first insulation performance attenuation coefficient is equal to the first load-bearing performance attenuation coefficient, that is, the average tripping speed (average slope) has a greater influence on the breaking performance attenuation than on the insulation performance attenuation and the load-bearing performance attenuation, and has the same influence on the insulation performance attenuation and the load-bearing performance attenuation.

[0115] The second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are less than the second insulation performance attenuation coefficient; the second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are equal, that is, the influence of the tripping frequency on the breaking performance attenuation is greater than that on the insulation performance attenuation, and the influence on the load-bearing performance attenuation is greater than that on the insulation performance attenuation.

[0116] The third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are equal, that is, the number of tripping times has the same influence on the breaking performance attenuation, the insulation performance attenuation and the load-bearing performance attenuation.

[0117] The fourth breaking performance attenuation coefficient is greater than the fourth insulation performance attenuation coefficient, and the fourth insulation performance attenuation coefficient is greater than the fourth load-bearing performance attenuation coefficient, that is, the total breaking consumption has a greater impact on the breaking performance attenuation than the insulation performance attenuation, and the impact on the insulation performance attenuation is greater than the impact on the load-bearing performance attenuation.

[0118] The first breaking performance attenuation coefficient is smaller than the third breaking performance attenuation coefficient, the third breaking performance attenuation coefficient is equal to the fourth breaking performance attenuation coefficient, and the second breaking performance attenuation coefficient is larger than the third breaking performance attenuation coefficient. That is, among the average tripping speed, tripping frequency, number of trippings and total opening consumption, the average tripping speed has the greatest impact on the breaking performance attenuation, the number of trippings and the total opening consumption have second impact on the breaking performance attenuation, and the tripping frequency has the least impact on the breaking performance attenuation.

[0119] The fourth insulation performance attenuation coefficient is greater than the third insulation performance attenuation coefficient, the fourth insulation performance attenuation coefficient is less than the second insulation performance attenuation coefficient and the first insulation performance attenuation coefficient, and the second insulation performance attenuation coefficient is equal to the first insulation performance attenuation coefficient, that is, among the average tripping speed, tripping frequency, number of trippings and total opening consumption, the number of trippings has the greatest impact on the insulation performance attenuation, the average tripping speed and the tripping frequency have the same and smallest impact on the insulation performance attenuation, and the impact of the total opening consumption on the insulation performance attenuation is less than the impact of the number of trippings, and greater than the impact of the tripping frequency.

[0120] The third load-bearing performance attenuation coefficient is less than the second load-bearing performance attenuation coefficient, the second load-bearing performance attenuation coefficient is less than the fourth load-bearing performance attenuation coefficient, and the fourth load-bearing performance attenuation coefficient is less than the first load-bearing performance attenuation coefficient. That is, among the average tripping speed, tripping frequency, tripping times and total opening consumption, the average tripping speed has the smallest effect on the load-bearing performance attenuation, while the tripping times have the largest effect, the tripping frequency has a smaller effect than the tripping times, the total opening consumption has a smaller effect than the tripping frequency, and the tripping frequency has a smaller effect than the average tripping speed.

[0121] For example, after obtaining the slope, tripping frequency, tripping times and total tripping consumption within a certain time period, the corresponding performance attenuation coefficient is found according to the relationship with the threshold, as shown in Table 1:

[0122] Table 1

[0123]

[0124] In Table 1, the smaller the value, the greater the impact.

[0125] In Table 1, the first breaking performance attenuation coefficient is 0.4, the first insulation performance attenuation coefficient is 0.9, and the first load-bearing performance attenuation coefficient is 0.9. Here, the three performance attenuation coefficients are determined according to the performance attenuation coefficient corresponding to the slope range of the average slope in the required period.

[0126] The second breaking performance attenuation coefficient is 0.7, the second insulation performance attenuation coefficient is 0.9, and the second load-bearing performance attenuation coefficient is 0.7;

[0127] The third breaking performance attenuation coefficient is 0.5, the third insulation performance attenuation coefficient is 0.5 and the third load-bearing performance attenuation coefficient is 0.5;

[0128] The fourth breaking performance attenuation coefficient is 0.3, the fourth insulation performance attenuation coefficient is 0.7, and the fourth load-bearing performance attenuation coefficient is 0.3.

[0129] Step 211, according to the tripping speed, tripping frequency, tripping times, total tripping consumption and performance attenuation coefficient, determine the comprehensive health status level of the molded case circuit breaker. Specifically, step 211 includes step A, step B, step C, step D, and step E:

[0130] Step A: determining a first health status level K1 according to a first breaking performance attenuation coefficient F1, a first insulation performance attenuation coefficient J1 and a first load-bearing performance attenuation coefficient C1.

[0131] The calculation formula for the first health status level K1 is:

[0132]

[0133] Step B: determining a second health status level K2 according to the second breaking performance attenuation coefficient F2, the second insulation performance attenuation coefficient J2 and the second load-bearing performance attenuation coefficient C2.

[0134] The calculation formula for the second health status level K2 is:

[0135]

[0136] Step C: determining a third health status level K3 according to the third breaking performance attenuation coefficient F3, the third insulation performance attenuation coefficient J3 and the third bearing performance attenuation coefficient C3.

[0137] The calculation formula for the third health status level K3 is:

[0138]

[0139] Step D: determining a fourth health status level K4 according to the fourth breaking performance attenuation coefficient F4, the fourth insulation performance attenuation coefficient J4 and the fourth load-bearing performance attenuation coefficient C4.

[0140] The calculation formula for the fourth health status level K4 is:

[0141]

[0142] The calculation formula in brackets in the above health status level calculation formula can reflect that the smaller the performance attenuation coefficient is, the greater the impact on the performance is. There is no order in which steps A to D are executed.

[0143] For example, the period is 10 days from the current time, V = 8 mm / s, P = 0.3, C = 3, H = 0.37, then K1 = 8.5, K2 = 9.2, K3 = 9, K4 = 9.4.

[0144] Step E, according to the first health status level K1, the second health status level K2, the third health status level K3 and the fourth health status level K4, determine the comprehensive health status level K of the molded case circuit breaker. Specifically, according to the first health status level K1, the second health status level K2, the third health status level K3, the fourth health status level K4, the average tripping speed V, the corresponding tripping frequency P, the corresponding number of tripping times C, and the corresponding total opening consumption H, determine the comprehensive health status level K of the molded case circuit breaker.

[0145] Among them, the average tripping speed V is the average tripping speed in the period used to determine the performance reduction coefficient. The tripping frequency P is the tripping frequency in the period used to determine the performance reduction coefficient. The number of trips C is the number of trips in the period used to determine the performance reduction coefficient. The total trip consumption H is the sum of each total trip consumption in the period used to determine the performance reduction coefficient.

[0146] Specifically, the inverse of each health status level is multiplied by the corresponding index, and then added to obtain the comprehensive health status level K of the molded case circuit breaker.

[0147] For example, according to the above data example, the comprehensive health status level of the molded case circuit breaker K = 1.34 is obtained, wherein the standard comprehensive health status level of the molded case circuit breaker may be less than or equal to 1, indicating that the performance of the molded case circuit breaker is basically normal. If the calculated comprehensive health status level K of the molded case circuit breaker is greater than 1, it means that the performance of the molded case circuit breaker has deteriorated and maintenance or replacement is required.

[0148] In one embodiment, the number of closing times within a certain cycle may also be calculated as a kind of data for performance monitoring.

[0149] When the handle moves to the closing position, the position sensor generates a closing conduction signal. When the conduction signal of the closing position is generated, the closing time point is recorded. The closing time point is in the date format or the date + time format. The number of closing times is determined according to the closing time point. In this step, recording a closing time point means that a closing has occurred. The number of closings that have occurred can be obtained according to the recorded closing time point. For example, if the data for one month or three months is recorded, the number of closings for one month or three months can be obtained.

[0150] Closing times Nh - tripping times Nt = fault-free closing times Ns. The fault-free closing times records the normal operation of the circuit breaker during its life cycle. This indicator can be used to record information during product use.

[0151] In one embodiment, the closing and disconnecting signals, tripping trigger signals, opening signals, and re-closing signals can be obtained, and the time points of the corresponding states can be recorded. The various state changes that occur in the circuit breaker during the service life can be recorded, providing reference data for troubleshooting when a fault occurs in the circuit system.

[0152] In this embodiment, based on the above monitoring data and the determined comprehensive health status level of the molded case circuit breaker, the user can warn the use of the circuit breaker and accurately locate the problem according to the comprehensive health status level and related data, and accurately maintain and monitor the molded case circuit breaker, thereby enhancing the safety of use and the safety of the entire circuit system. At the same time, it provides data support for the stability analysis of the circuit system.

[0153] like Figure 2 As shown, a third aspect of an embodiment of the present invention provides a molded case circuit breaker performance monitoring device, comprising:

[0154] An acquisition module 31 is used to respond to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, and respectively acquire the corresponding closing and disconnecting time, tripping and opening time and tripping and opening time point; wherein the disconnection signal and the opening signal are generated by a position sensor arranged at the handle;

[0155] The first determination module 32 is used to determine the shape of a relationship curve representing the relationship between the tripping speed and the tripping time point according to the preset movement distance of the handle, the closing and opening time, the tripping time and the tripping time point;

[0156] A second determination module 33, used to determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve;

[0157] A third determination module 34, used to determine the number of tripping times within a preset period according to the tripping opening time point;

[0158] A fourth determination module 35, for determining a tripping frequency according to the number of tripping times and a preset cycle;

[0159] A fifth determination module 36, for determining a consumption coefficient function according to a tripping speed, a tripping opening time point, a preset cycle and a corresponding number of tripping times;

[0160] A sixth determination module 37, for determining the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times;

[0161] A seventh determination module 38, for determining a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption;

[0162] The eighth determination module 39 is used to determine the comprehensive health status level of the molded case circuit breaker according to the tripping speed, tripping frequency, tripping times, total tripping consumption and performance attenuation coefficient.

[0163] In one embodiment of the present invention, the fifth determination module 36 is further used to fit each tripping speed with the tripping opening time point to obtain a first consumption coefficient function;

[0164] Fitting each preset cycle with the corresponding number of tripping times to obtain a second consumption coefficient function;

[0165] In one embodiment of the present invention, the sixth determination module is further used to determine the total opening consumption according to the first consumption coefficient function, the second consumption coefficient function, the standard consumption value, the tripping speed and the number of tripping times.

[0166] In one embodiment of the present invention, a molded case circuit breaker performance monitoring device further includes:

[0167] A timing module, used for starting to record the trigger maintenance time in response to the trip trigger signal;

[0168] The ninth determination module is used to determine that the tripping trigger signal is a tripping signal when the triggering maintenance time is greater than a preset time threshold.

[0169] In one embodiment of the present invention, the seventh determination module 38 is further used to determine the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient according to the slope;

[0170] Determine a second breaking performance attenuation coefficient, a second insulation performance attenuation coefficient, and a second load-bearing performance attenuation coefficient according to the tripping frequency;

[0171] According to the number of tripping times, determine the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient;

[0172] According to the total opening consumption, the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient and the fourth load-bearing performance attenuation coefficient are determined.

[0173] In one embodiment of the present invention, the first breaking performance attenuation coefficient is smaller than the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient, and the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient are equal;

[0174] The second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are less than the second insulation performance attenuation coefficient; the second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are equal;

[0175] The third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are equal;

[0176] The fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient and the fourth load-bearing performance attenuation coefficient are equal;

[0177] The fourth breaking performance attenuation coefficient is less than the first breaking performance attenuation coefficient, the first breaking performance attenuation coefficient is less than the third breaking performance attenuation coefficient; the third breaking performance attenuation coefficient is less than the second breaking performance attenuation coefficient;

[0178] The fourth insulation performance attenuation coefficient is smaller than the third insulation performance attenuation coefficient, and the third insulation performance attenuation coefficient is smaller than the second insulation performance attenuation coefficient and the first insulation performance attenuation coefficient;

[0179] The fourth bearing performance attenuation coefficient is smaller than the third bearing performance attenuation coefficient, the third bearing performance attenuation coefficient is smaller than the second bearing performance attenuation coefficient, and the second bearing performance attenuation coefficient is smaller than the first bearing performance attenuation coefficient.

[0180] In one embodiment of the present invention, the eighth determination module 39 is further configured to determine the first health status level according to the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient;

[0181] determining a second health status level according to the second breaking performance attenuation coefficient, the second insulation performance attenuation coefficient, and the second load-bearing performance attenuation coefficient;

[0182] Determining a third health status level according to the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient;

[0183] determining a fourth health status level according to the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient, and the fourth load-bearing performance attenuation coefficient;

[0184] The comprehensive health status level of the molded case circuit breaker is determined based on the first health status level, the second health status level, the third health status level, the fourth health status level, the average tripping speed, the corresponding tripping frequency, the corresponding number of tripping times, and the corresponding total tripping consumption.

[0185] In one embodiment of the present invention, the calculation formula of the first health status level K1 is:

[0186]

[0187] The calculation formula for the second health status level K2 is:

[0188]

[0189] The calculation formula for the third health status level K3 is:

[0190]

[0191] The calculation formula for the fourth health status level K4 is:

[0192]

[0193] A third aspect of an embodiment of the present invention further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned molded case circuit breaker performance monitoring method when executing the program.

[0194] A fourth aspect of an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps of the above-mentioned molded case circuit breaker performance monitoring method are implemented.

[0195] The memory may include a random access memory (RAM) or a non-volatile memory (NVM), such as at least one disk memory. Optionally, the memory may also be at least one storage device located away from the aforementioned processor.

[0196] The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0197] The method provided in the embodiment of the present invention can be applied to electronic devices. Specifically, the electronic device can be: a desktop computer, a portable computer, an intelligent mobile terminal, a server, etc. This is not limited here, and any electronic device that can implement the present invention belongs to the protection scope of the present invention.

[0198] As for the device / electronic device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0199] 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.

[0200] 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.

[0201] 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 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0202] 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 monitoring performance of a molded case circuit breaker, characterized in that: The following steps are involved: In response to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, the corresponding closing and disconnecting time, the tripping and opening time and the tripping and opening time point are respectively obtained; wherein the disconnection signal and the opening signal are generated by a position sensor arranged at the handle; Determine the shape of a relationship curve representing the relationship between the tripping speed and the tripping opening time point according to the preset moving distance of the handle, the closing and opening time, the tripping opening time and the tripping opening time point; Determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve; Determine the number of trips within a preset period based on the tripping and opening time point; Determine a tripping frequency according to the number of tripping times and the preset period; Determine a consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times; Determine the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times; Determine a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption; The comprehensive health status level of the molded case circuit breaker is determined according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient.

2. The method according to claim 1, characterized in that The determining of the consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times includes: Fitting each of the tripping speeds with the tripping opening time point to obtain a first consumption coefficient function; Fitting each of the preset cycles with the corresponding number of tripping times to obtain a second consumption coefficient function; Determining the total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times includes: The total opening consumption is determined according to the first consumption coefficient function, the second consumption coefficient function, a standard consumption value, the tripping speed and the number of tripping times.

3. The method according to claim 2, characterized in that The method further comprises: In response to a trip trigger signal, start recording a trigger maintenance time; When the triggering maintenance time is greater than the preset time threshold, it is determined that the tripping triggering signal is a tripping signal.

4. The method according to claim 1, characterized in that Determining a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption includes: According to the slope, determining a first breaking performance attenuation coefficient, a first insulation performance attenuation coefficient and a first load-bearing performance attenuation coefficient; Determining a second breaking performance attenuation coefficient, a second insulation performance attenuation coefficient, and a second load-bearing performance attenuation coefficient according to the tripping frequency; Determining a third breaking performance attenuation coefficient, a third insulation performance attenuation coefficient, and a third load-bearing performance attenuation coefficient according to the number of tripping times; According to the total opening consumption, a fourth breaking performance attenuation coefficient, a fourth insulation performance attenuation coefficient and a fourth load-bearing performance attenuation coefficient are determined.

5. The method according to claim 4, characterized in that The first breaking performance attenuation coefficient is smaller than the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient, and the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient are equal; The second breaking performance attenuation coefficient and the second load-bearing performance attenuation coefficient are less than the second insulation performance attenuation coefficient; The second breaking performance attenuation coefficient is equal to the second load-bearing performance attenuation coefficient; The third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient are equal; The fourth breaking performance attenuation coefficient is greater than the fourth insulation performance attenuation coefficient, and the fourth insulation performance attenuation coefficient is greater than the fourth load-bearing performance attenuation coefficient; The first breaking performance attenuation coefficient is less than the third breaking performance attenuation coefficient, and the third breaking performance attenuation coefficient is equal to the fourth breaking performance attenuation coefficient; The third breaking performance attenuation coefficient is less than the second breaking performance attenuation coefficient; The third insulation performance attenuation coefficient is smaller than the fourth insulation performance attenuation coefficient, the fourth insulation performance attenuation coefficient is smaller than the second insulation performance attenuation coefficient, and the second insulation performance attenuation coefficient is equal to the first insulation performance attenuation coefficient; The third bearing performance attenuation coefficient is smaller than the second bearing performance attenuation coefficient, the second bearing performance attenuation coefficient is smaller than the fourth bearing performance attenuation coefficient, and the fourth bearing performance attenuation coefficient is smaller than the first bearing performance attenuation coefficient.

6. The method according to claim 5, characterized in that Determining the comprehensive health status level of the molded case circuit breaker according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient includes: Determining a first health status level according to the first breaking performance attenuation coefficient, the first insulation performance attenuation coefficient and the first load-bearing performance attenuation coefficient; determining a second health status level according to the second breaking performance attenuation coefficient, the second insulation performance attenuation coefficient, and the second load-bearing performance attenuation coefficient; Determining a third health status level according to the third breaking performance attenuation coefficient, the third insulation performance attenuation coefficient and the third load-bearing performance attenuation coefficient; determining a fourth health status level according to the fourth breaking performance attenuation coefficient, the fourth insulation performance attenuation coefficient, and the fourth load-bearing performance attenuation coefficient; The comprehensive health status level of the molded case circuit breaker is determined based on the first health status level, the second health status level, the third health status level, the fourth health status level, the average tripping speed, the corresponding tripping frequency, the corresponding number of tripping times, and the corresponding total tripping consumption.

7. The method according to claim 6, characterized in that The calculation formula of the first health status level K1 is: The calculation formula of the second health status level K2 is: The calculation formula of the third health status level K3 is: The calculation formula of the fourth health status level K4 is: Among them, K1 represents the determination of the first health status level, F1 represents the first breaking performance attenuation coefficient, J1 represents the first insulation performance attenuation coefficient, and C1 represents the first load-bearing performance attenuation coefficient; K2 represents the determination of the second health status level, F2 represents the second breaking performance attenuation coefficient, J2 represents the second insulation performance attenuation coefficient, and C2 represents the second load-bearing performance attenuation coefficient; K3 represents the determination of the third health status level, F3 represents the third breaking performance attenuation coefficient, J3 represents the third insulation performance attenuation coefficient, and C3 represents the third load-bearing performance attenuation coefficient; K4 represents the determination of the fourth health status level, F4 represents the fourth breaking performance attenuation coefficient, J4 represents the fourth insulation performance attenuation coefficient, and C4 represents the fourth load-bearing performance attenuation coefficient.

8. A performance monitoring device for a molded case circuit breaker, characterized in that: include: An acquisition module, for responding to the disconnection signal of each closing position and the opening signal of the corresponding tripping position, respectively acquiring the corresponding closing and disconnecting time, the tripping and opening time and the tripping and opening time point; wherein the disconnection signal and the opening signal are generated by a position sensor arranged at the handle; A first determination module is used to determine the shape of a relationship curve representing the relationship between the tripping speed and the tripping opening time point according to a preset moving distance of the handle, the closing and opening time, the tripping opening time and the tripping opening time point; A second determination module is used to determine the slope corresponding to each tripping and opening time point according to the shape of the relationship curve; A third determination module is used to determine the number of tripping times within a preset period according to the tripping opening time point; A fourth determination module, used to determine a tripping frequency according to the number of tripping times and the preset period; A fifth determination module, configured to determine a consumption coefficient function according to the tripping speed, the tripping opening time point, the preset cycle and the corresponding number of tripping times; A sixth determination module, configured to determine a total opening consumption according to the consumption coefficient function, the standard consumption value, the tripping speed and the tripping times; A seventh determination module, configured to determine a performance attenuation coefficient according to the slope, the tripping frequency, the number of tripping times and the total opening consumption; The eighth determination module is used to determine the comprehensive health status level of the molded case circuit breaker according to the tripping speed, the tripping frequency, the number of tripping times, the total opening consumption and the performance attenuation coefficient.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the molded case circuit breaker performance monitoring method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for monitoring the performance of a molded case circuit breaker according to any one of claims 1 to 7 is implemented.

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