Intelligent primary and secondary fusion pole-mounted circuit breaker

Abstract

This invention discloses an intelligent primary and secondary integrated pole-mounted circuit breaker, relating to the technical field of integrated pole-mounted circuit breakers, including a mechanism box. This invention utilizes a temperature sensor and a surface-mount thermistor to facilitate direct and accurate temperature data acquisition from the terminal block inside the terminal box, improving the accuracy and real-time performance of temperature monitoring, thereby enabling real-time detection of terminal block overheating faults. An anomaly detection module accurately distinguishes between various abnormal states such as natural temperature rise, sensor failure, short-term overload, and poor contact, significantly reducing false alarm rates and enabling early identification of potential faults. A condition assessment module quantifies and calculates the lifespan of seven influencing factors, including temperature difference cycling, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation, and instantaneous high-temperature shock, dynamically assessing the remaining lifespan and health status of the surface-mount thermistor.

Description

Technical Field

[0001] This invention relates to the field of integrated pole-mounted circuit breaker technology, and more particularly to an intelligent integrated primary and secondary pole-mounted circuit breaker. Background Technology

[0002] In power distribution network systems, intelligent primary and secondary integrated pole-mounted circuit breakers are core equipment for ensuring the safe and stable operation of the power grid, playing a crucial role in line protection, fault isolation, and power distribution. As distribution network systems develop towards intelligence and refinement, higher requirements are placed on the operational reliability and condition monitoring capabilities of pole-mounted circuit breakers. Currently, although existing intelligent primary and secondary integrated pole-mounted circuit breakers integrate basic monitoring components such as current transformers and voltage sensors, enabling the monitoring of electrical parameters such as line current and voltage;

[0003] Existing temperature detection methods typically involve wireless temperature tags and manual inspections. However, manual inspections require maintenance personnel to periodically carry infrared thermometers and other equipment to the site, which is not only costly in terms of manpower and resources but also has long inspection cycles (usually monthly or quarterly), making it difficult to detect sudden overheating faults in a timely manner and prone to "missed detections" and "delayed detections." Furthermore, outdoor pole-mounted equipment is scattered and located in complex terrain, resulting in extremely low inspection efficiency. In extreme weather conditions (such as heavy rain, blizzards, and high temperatures), there are also safety risks to maintenance personnel. While wireless temperature tags enable non-contact temperature measurement, the tags must be affixed to the terminal surface. Due to the limited space and high temperatures at the terminals, the adhesion is poor, and the tags are prone to falling off. Additionally, the wireless signal attenuates significantly inside the metal terminal box, resulting in poor data transmission stability and difficulty in ensuring the real-time and continuous nature of monitoring data. Moreover, the limited battery life of the tags and the cumbersome replacement and maintenance further increase maintenance costs.

[0004] Therefore, improvements are needed to address the aforementioned issues. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing an intelligent primary and secondary integrated pole-mounted circuit breaker.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an intelligent primary and secondary integrated pole-mounted circuit breaker, comprising a mechanism box, three poles are equidistantly installed on the top surface of the mechanism box, a current transformer is installed on one side of the three poles, a first connecting bracket is fixedly connected to the lower side of the mechanism box, three voltage sensors are installed on one end of the top surface of the first connecting bracket, the three voltage sensors are electrically connected to the current transformers, a second connecting bracket is bolted to the top surface of the mechanism box between the three poles, a voltage transformer is installed on one end of the top surface of the second connecting bracket, and a temperature measuring component for real-time monitoring of terminal temperature and prevention of overheating faults is installed at the top of the three poles at the terminal box.

[0007] A control box is bolted to one side of the outer wall of the mechanism box. The control box is equipped with an anomaly detection module and a status assessment module.

[0008] The anomaly detection module, based on multi-source data such as current, voltage, terminal block temperature and ambient temperature, achieves intelligent diagnosis of the circuit breaker's operating status through data preprocessing, segmented statistics and fluctuation analysis.

[0009] The condition assessment module quantifies and analyzes influencing factors such as temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation and instantaneous high temperature shock, calculates the loss rate of each factor on the effective working life of the thermistor, sums up the total impact value by adding up the values ​​of each factor, and compares it with the initial remaining life rate to achieve dynamic assessment of the health status and life prediction of the thermistor.

[0010] Preferably, the data analysis steps of the anomaly detection module are as follows:

[0011] M1: Preprocess the acquired current, voltage, and temperature data, and use the preprocessed data as the valid data for each item; acquire historical data from the same period and calculate its average. As a benchmark, the normal fluctuation range of each data point is set. By analyzing data fluctuations exceeding a certain threshold within a unit of time... The time period is segmented and marked, and anomaly judgment is made by combining the number of segments of historical abnormal data;

[0012] M2: Calculates the ambient reference temperature by combining historical ambient temperature data. and its fluctuation range The cause of the anomaly is determined based on the combined trends of current, voltage, temperature, and ambient temperature.

[0013] Preferably, the data analysis steps of the anomaly detection module are as follows:

[0014] N1: Quantitative analysis of seven factors affecting the lifespan of surface mount thermistors, including temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation and instantaneous high temperature shock, and calculation of the loss rate of each factor on the effective working life of the thermistor.

[0015] N2: Based on historical data analysis, determine the attenuation coefficient of each influencing factor, and calculate the impact value of each factor based on real-time monitoring data or environmental parameters; sum the impact values ​​of each factor to obtain the total impact value. and the initial effective working life remaining rate Compare;

[0016] N3: When When, a message appears saying "Inspection and maintenance required"; when At that time, the thermistor will be forcibly replaced.

[0017] Preferably, the upper ends of the outer walls on both sides of the mechanism box are fixed with handles for easy hoisting and maintenance, and multiple mounting plates are equidistantly distributed on the lower periphery of the outer wall of the mechanism box, with mounting holes on the top surface of each mounting plate.

[0018] Preferably, a data interface is provided on the outer wall of one end of the mechanism box, and an interface cover is threaded onto the data interface.

[0019] Preferably, the temperature measuring assembly includes a temperature sensor fixed to the outer wall of one side of the terminal box by bolts. A protective sleeve for protecting the temperature measuring data lines is fixed to the temperature sensor. Two temperature measuring data lines electrically connected to the temperature sensor are provided inside the protective sleeve. One end of the protective sleeve is located at the terminal block of the terminal box, and a surface-mount thermistor is fixed to one end of the two temperature measuring data lines.

[0020] Preferably, the outer wall of the terminal block is symmetrically provided with two external threaded cylinders, the surface mount thermistor is sleeved on the outer wall of the external threaded cylinder, the external threaded cylinder is threaded with a limiting nut for pressing and fixing the surface mount thermistor, the bottom surface of the surface mount thermistor abuts against the surface of the terminal block, and the outer surface of the surface mount thermistor is coated with waterproof adhesive.

[0021] Preferably, the temperature sensor is provided with a connecting pipe on one side of the protective sleeve that connects to the inside of the control box, and the connecting pipe contains a data line for electrically connecting the temperature sensor to the control box.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. By combining a temperature sensor with a surface-mount thermistor, it is easy to directly attach to the terminal block inside the terminal box to accurately collect temperature data, improving the accuracy and real-time performance of temperature monitoring. This enables real-time detection of terminal overheating faults. Furthermore, the combination of a protective sleeve and a connecting tube facilitates protection of the temperature measurement data line and ensures a stable electrical connection between the temperature sensor and the control box. This improves the operational stability of the temperature measurement component and the continuity of data transmission in complex outdoor environments, enabling reliable temperature data transmission and subsequent fault warning functions. Ultimately, this solves the problems of existing devices relying on manual inspection and wireless temperature tags for temperature detection, which are labor-intensive, have low inspection efficiency, lead to missed detections and high personal safety risks, and are prone to wireless tag detachment, unstable data transmission, and high maintenance costs. This improves the convenience, reliability, and maintenance efficiency of intelligent primary and secondary integrated pole-mounted circuit breaker terminal temperature monitoring.

[0024] 2. The anomaly detection module collects, preprocesses, and analyzes fluctuations of multi-source data such as current, voltage, terminal block temperature, and ambient temperature in real time. It accurately distinguishes various abnormal states such as natural temperature rise, sensor failure, short-term overload, and poor contact, which greatly reduces the false alarm rate and can identify potential faults in advance. It realizes the transformation from "post-event processing" to "pre-event warning", which significantly improves the safe operation level and maintenance response efficiency of distribution network equipment.

[0025] 3. The status assessment module performs quantitative modeling and life loss calculation for seven types of influencing factors, including temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation, and instantaneous high temperature shock, to dynamically assess the remaining life and health status of the surface mount thermistors. When the cumulative loss reaches a set threshold, it automatically triggers a "maintenance required" or "forced replacement" prompt, thereby achieving predictive maintenance of key temperature sensing components. This avoids monitoring interruptions or data distortion caused by sensor failure, improves the long-term reliability of the system, and reduces the operation and maintenance costs and safety risks caused by sudden failures. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a first-view schematic diagram of the overall structure proposed in this invention;

[0028] Figure 2 This is a second-view schematic diagram of the overall structure proposed in this invention;

[0029] Figure 3 This is a third-view schematic diagram of the overall structure proposed in this invention;

[0030] Figure 4 The present invention proposes Figure Three Enlarged structural diagram of the section labeled A;

[0031] Figure 5 This is a flowchart of the system proposed in this invention.

[0032] The following are the components listed in the diagram: 1. Mechanism box; 2. Pole post; 3. Current transformer; 4. Voltage sensor; 5. Voltage transformer; 6. Handle; 7. Control box; 8. Interface cover; 9. Terminal box; 10. Temperature sensor; 11. Protective sleeve; 12. Temperature measurement data cable; 13. Terminal block; 14. Surface mount thermistor; 15. Limit nut. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0034] Example 1: See Figures 1 to 4This invention discloses an intelligent primary and secondary integrated pole-mounted circuit breaker, comprising a mechanism box 1. Three poles 2 are equidistantly mounted on the top surface of the mechanism box 1. A current transformer 3 is mounted on one side of each pole 2. A first connecting bracket is fixed to the lower side of the mechanism box 1. Three voltage sensors 4 are mounted on one end of the top surface of the first connecting bracket, and the three voltage sensors 4 are electrically connected to the current transformers 3. Second connecting brackets are bolted to the top surface of the mechanism box 1 between the three poles 2. A voltage transformer 5 is mounted on one end of the top surface of each second connecting bracket. Temperature measuring components for real-time monitoring of terminal temperature and prevention of overheating faults are installed at the top of each of the three poles 2 at the terminal box 9. Current transformer 3 uses a ZW32 series current transformer, voltage sensor 4 uses a ZW32 series voltage sensor, and voltage transformer 5 uses a ZW32 series voltage transformer. These components offer strong adaptability and high monitoring accuracy, enabling precise acquisition of line electrical parameters. The mechanism box 1, pole 2, first connecting bracket, second connecting bracket, and mounting plate are made of Q235 steel. This Q235 steel structure provides high mechanical strength and load-bearing capacity, effectively ensuring the overall structural stability of the circuit breaker. This completes the basic assembly of the circuit breaker's main structure, integrating basic monitoring components and temperature measurement components, providing a stable platform for monitoring line electrical parameters and terminal temperature. The above components together form the basic framework of the device, ensuring the integrity and stability of the overall circuit breaker structure and laying a solid structural foundation for subsequent accurate monitoring and fault early warning functions. Handles 6 are fixed to the upper ends of the outer walls on both sides of the mechanism box 1 for easy hoisting and maintenance. Multiple mounting plates are evenly distributed around the lower perimeter of the outer wall of the mechanism box 1, each with mounting holes on its top surface. The handles 6 are made of aluminum alloy, which is lightweight and corrosion-resistant, facilitating operation and maintenance while extending service life. The handles 6 facilitate hoisting and subsequent maintenance of the circuit breaker, and the mounting plates and holes ensure stable installation of the circuit breaker on the column, improving equipment installation efficiency. To ensure ease of operation and maintenance and guarantee installation stability during equipment operation, a control box 7 is bolted to one side of the outer wall of the mechanism box 1. A data interface is located on one end of the outer wall of the mechanism box 1, and an interface cover 8 is threaded onto the data interface. The interface cover 8 is made of aluminum alloy, which is lightweight, corrosion-resistant, and extends its service life. The control box 7 provides an installation and operating platform for electrical parameter processing, temperature data analysis, and fault early warning. The data interface facilitates later data export or equipment debugging, and the interface cover 8 provides a sealing and protective function for the data interface. This ensures the stability of equipment monitoring data processing and the cleanliness of the data interface, improving the ease of equipment operation and maintenance.

[0035] In this invention, the temperature measuring assembly includes a temperature sensor 10 bolted to the outer wall of one side of the terminal box 9. A protective sleeve 11 for protecting the temperature measuring data lines 12 is fixed to the temperature sensor 10. Two temperature measuring data lines 12 electrically connected to the temperature sensor 10 are housed inside the protective sleeve 11. One end of the protective sleeve 11 is located at the terminal block 13 of the terminal box 9, and a surface-mount thermistor 14 is fixed to one end of each of the two temperature measuring data lines 12. The temperature sensor 10 uses a DS18B20 digital temperature sensor, which has high temperature measurement accuracy and fast response speed, suitable for real-time temperature monitoring of the terminal box. The protective sleeve 11 is made of PVC material, which provides good insulation and corrosion resistance. The temperature measurement data cable 12 is corrosion-resistant, effectively protecting it from outdoor environmental corrosion. The RVVP shielded cable used in the temperature measurement data cable 12 provides strong anti-interference capabilities, ensuring the stability of temperature signal transmission. The terminal box 9 and terminal block 13 are made of flame-retardant ABS material, offering excellent insulation and flame-retardant performance, enhancing the electrical safety of the equipment. Through the cooperation of the temperature sensor 10, protective sleeve 11, temperature measurement data cable 12, and surface-mount thermistor 14, direct and accurate acquisition and signal transmission of terminal temperature can be achieved. This improves the accuracy of temperature monitoring and the stability of data transmission, providing reliable fault early warning. Data support; two externally threaded cylinders are symmetrically arranged on the outer wall of the terminal block 13. The surface mount thermistor 14 is sleeved on the outer wall of the externally threaded cylinder. The externally threaded cylinder is threaded with a limiting nut 15 for pressing and fixing the surface mount thermistor 14. The bottom surface of the surface mount thermistor 14 abuts against the surface of the terminal block 13, and the outer surface of the surface mount thermistor 14 is coated with waterproof adhesive. The limiting nut 15 is made of 304 stainless steel, which is corrosion-resistant and has high strength, ensuring a stable fixation of the surface mount thermistor 14. The cooperation between the externally threaded cylinder and the limiting nut 15 ensures a tight fit between the surface mount thermistor 14 and the terminal block 13, guaranteeing accurate temperature measurement. The waterproof adhesive further enhances the performance of the surface mount thermistor 14. Waterproof performance, suitable for complex outdoor environments; improves the installation stability and environmental adaptability of the temperature sensing component, ensuring continuous reliability of temperature monitoring; the temperature sensor 10 is located on one side of the protective sleeve 11 and has a connecting pipe connecting to the inside of the mechanism box 1, and the connecting pipe contains a data cable for electrically connecting the temperature sensor 10 and the control box 7; the connecting pipe is made of stainless steel, which has high structural strength and corrosion resistance, and can protect the data cable and ensure neat wiring; it realizes stable signal docking between the temperature sensor 10 and the control box 7, ensuring fast and stable transmission of temperature data to the control box 7; it improves the reliability of data transmission, ensuring the smooth realization of the control box 7's real-time analysis and fault warning functions for temperature data.

[0036] Working Principle: In the use of this invention, firstly, the surface-mount thermistor 14 is sleeved onto the external threaded sleeve of the terminal block 13 inside the terminal box 9, and tightened and fixed by the limiting nut 15, so that the bottom surface of the surface-mount thermistor 14 is tightly against the surface of the terminal block 13. At the same time, waterproof adhesive is coated on the outer surface of the surface-mount thermistor 14 to ensure the accuracy of temperature acquisition and improve waterproof performance. Meanwhile, the temperature sensor 10 is fixed to the outer wall of one side of the terminal box 9 by bolts. The two temperature measurement data lines 12 connected to it pass through the protective sleeve 11 and extend to the terminal block 13 to be electrically connected to the surface-mount thermistor 14. The protective sleeve 11 can protect the temperature measurement data lines 12 to prevent dust and moisture in the outdoor environment from affecting data transmission. The connecting tube on one side of the temperature sensor 10 connects to the inside of the mechanism box 1. The data line electrically connected to the control box 7 of the temperature sensor 10 is passed through the connecting tube to realize the signal docking between the temperature measurement component and the control box 7. The handles on both sides of the mechanism box 1 are... 6. This facilitates equipment hoisting and subsequent maintenance. The circuit breaker can be securely installed on the designated position on the column through the mounting holes on the mounting plate at the lower end of the mechanism box 1. The data interface is used for later data export or equipment debugging. Normally, the interface is sealed by screws through the interface cover 8 to ensure cleanliness. When the device is running, the current transformer 3 and voltage sensor 4 collect the current and voltage parameters of the line in real time. The voltage transformer 5 assists in completing the accurate conversion of the voltage signal. The relevant electrical parameter data are synchronously transmitted to the control box 7 for processing. At the same time, the surface mount thermistor 14 senses the temperature change of the terminal block 13 in real time and transmits the temperature signal to the temperature sensor 10 through the temperature measurement data line 12. After the temperature sensor 10 converts and processes the signal, it is transmitted to the control box 7 through the data line in the connecting pipe. The control box 7 analyzes the received temperature data in real time. If the temperature of the terminal block 13 exceeds the preset threshold, a fault warning signal is immediately issued to remind the maintenance personnel to deal with it in time. At this point, the device is in use.

[0037] Example 2: See Figure 5 The control box 7 is equipped with an intelligent control component, which includes an anomaly detection module and a status assessment module.

[0038] The anomaly detection module, based on multi-source data such as current, voltage, terminal block temperature and ambient temperature, achieves intelligent diagnosis of the circuit breaker's operating status through data preprocessing, segmented statistics and fluctuation analysis.

[0039] The status assessment module quantifies and analyzes influencing factors such as temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation and instantaneous high temperature shock, calculates the loss rate of each factor on the effective working life of the thermistor, and obtains the total impact value by accumulating the various impact values ​​and comparing it with the initial life remaining rate, so as to realize the dynamic assessment of the health status of the thermistor and life prediction.

[0040] The acquired current, voltage, and temperature data are preprocessed, and the corresponding data obtained after preprocessing are used as the valid data for each item. Historical data is acquired, and the corresponding data within a set time period relative to the current time point are retrieved from the historical data, and the mean of the corresponding data is calculated. Based on the real-time detected corresponding data and mean The absolute value of the difference serves as the recent fluctuation data for the corresponding item.

[0041] Preprocessing: The collected data is sorted according to the collection time, and corresponding items collected at the same time are processed. averaging the data and standard deviation The calculation, and the mean obtained from the calculation. and standard deviation Collect data fluctuation range for corresponding items The system is configured to compare the collected data for a given item with its fluctuation range, mark data outside the fluctuation range as outliers, and record the number of outliers. ,like If the collected data is abnormal, the data will be re-tested; if If outliers are removed, the mean of the remaining corresponding test data after outlier removal is calculated. The calculation, and the mean obtained from the calculation. As the corresponding data detected at the corresponding time;

[0042] Retrieve historical data corresponding to items within a set time period at the current time point, process the valid data according to preprocessing methods, and obtain the fluctuation range of the valid data. ( For the corresponding data sequence number, Time represents current data, Time represents voltage data, (The time represents the temperature data of the terminal block 13), and the fluctuation range of the corresponding valid data is taken as the normal fluctuation of the corresponding data.

[0043] The fluctuation of the corresponding data within a unit of time exceeds The time period is marked, the marked time period is divided into segments according to unit time, and the number of segments is counted; the fluctuation of the corresponding data when an anomaly occurs in the historical data is retrieved, and the data is segmented; the number of segments of the corresponding data for each anomaly is calculated, the fluctuation range is set, and the corresponding data for the number of segments exceeding the fluctuation range is determined to be an anomaly.

[0044] The ambient temperature data for the same time period in historical data is retrieved, and the average ambient temperature is calculated and taken as the ambient reference temperature. And calculate the fluctuation. ;

[0045] If the ambient temperature Increased and fluctuations exceeded the range Terminal block 13 temperature Synchronous rise, real-time average current and voltage within normal fluctuation range , If the temperature rises within the specified range, it is determined to be a natural temperature increase of the equipment caused by the rise in ambient temperature, and no alarm is required; if , , Of the three data points, only one data point consistently shows a real-time value exceeding the historical fluctuation range. If the other two parameters are normal and the ambient temperature is stable, then the problem is determined to be a sensor malfunction, drift, or abnormal data transmission; if the current... Short fluctuations exceeding the normal range And with The difference is greater than the preset threshold, temperature It then rose rapidly, but the voltage If the condition is normal, it is determined to be a short-term overload or transient fault, and an alert should be issued and the event recorded.

[0046] The surface-mount thermistor 14 is affected by various factors in outdoor applications using the terminal box 9. Outdoor temperature differences cause repeated thermal expansion and contraction, leading to loosening of the surface mount joints, fatigue cracking of the lead solder joints, and accelerated aging of the insulating coating, reducing temperature measurement accuracy and structural stability. The impact of temperature cycling is also significant. ,in The attenuation coefficient caused by temperature difference cycling. For temperature difference circulation, This refers to the number of temperature difference cycles.

[0047] Condensation forms moisture on the surface of the thermistor, damaging its insulation performance, increasing the risk of leakage, and combining with dust and metallic impurities in the terminal box to form a corrosive medium that erodes the thermistor's leads and packaging material. Over time, this can easily lead to poor contact, short circuits, or even failure, ultimately causing distortion or interruption of temperature data acquisition. The impact of condensation is significant. ,in The attenuation coefficient caused by condensation. This refers to the duration of condensation.

[0048] Although terminal boxes provide protection, dust and salt spray in outdoor environments (coastal / chemical areas) can adhere to the surface of the thermistor. Long-term accumulation can block heat dissipation channels and accelerate the aging of the insulation coating. Corrosive media such as salt spray can also corrode the thermistor's leads and solder joints, leading to increased contact resistance or even open circuits. The impact of dust and salt spray... ,in and These are the attenuation coefficients caused by dust and salt spray, respectively. For the amount of dust accumulation, Salt spray concentration, For the number of days of exposure;

[0049] The distribution network environment where the circuit breaker is located is subject to strong electromagnetic radiation (such as surges generated by switching operations and electromagnetic induction from nearby high-voltage equipment). The signal transmission lines of surface-mount thermistors are susceptible to electromagnetic interference, leading to distorted temperature data acquisition (such as abnormal fluctuations or jumps). The impact of electromagnetic interference... ,in The attenuation coefficient caused by electromagnetic interference. Electromagnetic interference intensity;

[0050] Outdoor equipment may be subjected to strong winds, vehicle vibrations, and mechanical shocks from equipment operation (such as circuit breaker opening and closing). The surface mount and lead solder joints of the thermistors are prone to loosening or detachment due to long-term vibration, damaging the physical contact for temperature acquisition and leading to data interruption or errors. The impact of mechanical vibration is significant. ,in The attenuation coefficient caused by mechanical vibration. For mechanical vibration acceleration, The duration of vibration;

[0051] Prolonged exposure to ultraviolet (UV) radiation from outdoor sunlight accelerates the aging and embrittlement of the insulating materials (such as waterproof adhesive and encapsulation coating) on ​​the surface of thermistors, reducing their insulation performance and waterproofing effectiveness, and increasing the risk of leakage and short circuits; the impact of UV radiation... ,in The attenuation coefficient caused by condensation. Ultraviolet radiation;

[0052] When an overload or short-circuit fault occurs in the circuit, the temperature inside the terminal box will rise sharply in a short period of time (potentially exceeding 150°C), far exceeding the rated operating temperature limit of the thermistor. This will accelerate the aging of the thermistor component and may even directly burn out the sensor; the impact of instantaneous high-temperature shock. ,in The attenuation coefficient caused by instantaneous high-temperature impact. For instantaneous high temperature, This refers to the rated operating temperature of the thermistor.

[0053] By analyzing historical data, the impact of each influencing factor's unit change on the effective working life of the thermistor is obtained. Based on the impact, the loss rate of each influencing factor on the remaining effective working life of the thermistor is calculated, which is the attenuation coefficient of the corresponding item.

[0054] The total impact value is obtained by adding up the above impact values. ,when When, a message appears saying "Inspection and maintenance required"; when When forced to "replace the thermistor", the initial effective working life remaining rate is... .

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intelligent primary and secondary integrated pole-mounted circuit breaker, comprising a mechanism box (1), three poles (2) are equidistantly installed on the top surface of the mechanism box (1), a current transformer (3) is installed on one side of each of the three poles (2), a first connecting bracket is fixedly connected to one side of the lower end of the mechanism box (1), three voltage sensors (4) are installed on one end of the top surface of the first connecting bracket, the three voltage sensors (4) are electrically connected to the current transformer (3), and a second connecting bracket is bolted to each of the three poles (2) on the top surface of the mechanism box (1), a voltage transformer (5) is installed on one end of the top surface of the second connecting bracket, characterized in that: The top of each of the three poles (2) is equipped with a temperature measuring component for real-time monitoring of the terminal temperature and prevention of overheating faults at the terminal box (9); A control box (7) is bolted to one side of the outer wall of the mechanism box (1). The control box (7) is equipped with an anomaly judgment module and a status evaluation module. The anomaly detection module, based on multi-source data such as current, voltage, terminal block temperature and ambient temperature, achieves intelligent diagnosis of the circuit breaker's operating status through data preprocessing, segmented statistics and fluctuation analysis. The condition assessment module quantifies and analyzes influencing factors such as temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation and instantaneous high temperature shock, calculates the loss rate of each factor on the effective working life of the thermistor, sums up the total impact value by adding up the values ​​of each factor, and compares it with the initial remaining life rate to achieve dynamic assessment of the health status and life prediction of the thermistor.

2. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The data analysis steps of the anomaly detection module are as follows: M1: Preprocess the acquired current, voltage, and temperature data, and use the preprocessed data as the valid data for each item; acquire historical data from the same period and calculate its average. As a benchmark, the normal fluctuation range of each data point is set. By analyzing data fluctuations exceeding a certain threshold within a unit of time... The time period is segmented and marked, and anomaly judgment is made by combining the number of segments of historical abnormal data; M2: Calculates the ambient reference temperature by combining historical ambient temperature data. and its fluctuation range The cause of the anomaly is determined based on the combined trends of current, voltage, temperature, and ambient temperature.

3. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The data analysis steps of the anomaly detection module are as follows: N1: Quantitative analysis of seven factors affecting the lifespan of surface mount thermistors, including temperature difference cycle, condensation, dust and salt spray, electromagnetic interference, mechanical vibration, ultraviolet radiation and instantaneous high temperature shock, and calculation of the loss rate of each factor on the effective working life of the thermistor. N2: Based on historical data analysis, determine the attenuation coefficient of each influencing factor, and calculate the impact value of each factor based on real-time monitoring data or environmental parameters; sum the impact values ​​of each factor to obtain the total impact value. and the initial effective working life remaining rate Compare; N3: When When, a message appears saying "Inspection and maintenance required"; when At that time, the thermistor will be forcibly replaced.

4. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The upper ends of the outer walls on both sides of the mechanism box (1) are fixed with handles (6) for easy hoisting and maintenance. Multiple mounting plates are evenly distributed on the lower periphery of the outer wall of the mechanism box (1), and mounting holes are opened on the top surface of each mounting plate.

5. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 4, characterized in that: A data interface is provided on the outer wall of one end of the mechanism box (1), and an interface cover (8) is threadedly connected to the data interface.

6. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 1, characterized in that: The temperature measuring assembly includes a temperature sensor (10) that is bolted to the outer wall of one side of the terminal box (9). A protective sleeve (11) for protecting the temperature measuring data line (12) is fixed to the temperature sensor (10). Two temperature measuring data lines (12) that are electrically connected to the temperature sensor (10) are provided inside the protective sleeve (11). One end of the protective sleeve (11) is located at the terminal block (13) of the terminal box (9). A surface mount thermistor (14) is fixed to one end of the two temperature measuring data lines (12).

7. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that: The outer wall of the terminal block (13) is symmetrically provided with two external threaded cylinders. The surface mount thermistor (14) is sleeved on the outer wall of the external threaded cylinder. The external threaded cylinder is threaded with a limiting nut (15) for pressing and fixing the surface mount thermistor (14). The bottom surface of the surface mount thermistor (14) abuts against the surface of the terminal block (13), and the outer surface of the surface mount thermistor (14) is coated with waterproof adhesive.

8. The intelligent primary and secondary integrated pole-mounted circuit breaker according to claim 6, characterized in that: The temperature sensor (10) is located on one side of the protective sleeve (11) and has a connecting pipe that connects to the inside of the mechanism box (1). The connecting pipe has a data line for electrically connecting the temperature sensor (10) and the control box (7).

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