Suíomh na nPointe Cóir agus Teicneolaíocht Rialú Sábháilteachta do Chloisíní SF₆ Ard - Voltaige

1. Blocking effect: It gives full play to the arc - blowing effect of the gas flow. The arc - extinguishing chamber is small in size, simple in structure, large in breaking current, short in arcing time, has no reignition when breaking capacitive or inductive current, and has low over - voltage.
2. Long electrical life: It can continuously break 19 times at a full capacity of 50kA, with a cumulative breaking current of 4200kA, a long maintenance cycle, and is suitable for frequently - operated scenarios.
3. High insulation strength: SF₆ gas can pass various insulation tests with a large margin under 0.3MPa. After the cumulative breaking current reaches 3000kA, each breaking port can withstand a power - frequency voltage of 250kV within 1 minute under 0.3MPa, and can still withstand a power - frequency voltage of 166.4kV when the SF₆ gas pressure is reduced to zero gauge pressure.
4. Good sealing performance: The water content of SF₆ gas is relatively low. The arc - extinguishing chamber, resistors, and supports can be divided into independent gas compartments to prevent dirt and moisture from entering the interior of the circuit breaker.
5. Small operating power and smooth buffering: The transmission ratio between the working cylinder of the mechanism and the arc - extinguishing contact is 1∶1, and the mechanism has stable characteristics. The stability of the mechanism characteristics can reach 3000 times (10000 times in the test environment), and the operating noise is less than 90dB.

1. Electrical hazards: Caused by equipment insulation damage or operational errors, mainly manifested as high voltage and arcs. Since the circuit breaker carries high voltage during operation and has capacitive and inductive effects, residual charges may still exist even when it is in the open - circuit state, leading to electric shock injuries. Arcs may generate high temperatures and cause fires.
2. Mechanical hazards: The hazards mainly come from the mechanical components of the equipment. If not properly operated and maintained, one may be pinched or bumped by rotating or moving parts.
3. Chemical hazards: SF₆ gas is stable at room temperature, but it begins to decompose under the action of arcs, corona, etc. Inhaling the generated gas may cause dizziness, pulmonary edema, or even death.
4. Environmental hazards: Performing maintenance in weather such as thunderstorms and strong winds not only increases the difficulty of maintenance work but also brings uncontrollable risks to maintenance personnel. In addition, problems such as poor ventilation and small space in the maintenance environment may also increase the danger of on - site maintenance.

1. Fiber optic sensing technology: Fiber optic sensing technology has excellent insulation performance and anti - electromagnetic interference ability. It can effectively monitor the structural health and electrical parameters of SF₆ circuit breakers, collect and analyze data in real - time, and promptly detect potential faults and safety hazards.
2. Wireless sensor network: A wireless sensor network is composed of a large number of sensor nodes. Its main purpose is to monitor environmental parameters, equipment status, and the location information of maintenance personnel in real - time. The network has the characteristics of self - organization, self - adaptation, and anti - interference, and can adapt to the complex and changeable environmental conditions on - site, realizing real - time monitoring and location of hazard points.
3. Machine vision and infrared thermal imaging technology: Machine vision technology can identify and locate potential hazard points, such as exposed cables and damaged equipment, by capturing and analyzing on - site images; while infrared thermal imaging technology can monitor the temperature distribution of equipment in real - time and accurately locate fault points and potential risk points.

1. Data collection: Obtained through various sensors, operation records of monitoring equipment, etc. To improve the accuracy of the model, a large amount of comprehensive data should be collected as much as possible.
2. Data preprocessing: Preprocess the original data (outlier detection and processing, data transformation, etc.) to improve data quality and lay the foundation for subsequent feature engineering and model training.
3. Feature engineering: After preprocessing is completed, useful features for hazard point prediction need to be selected from a large amount of data. These features should have good discrimination and predictive ability to improve the accuracy of the model.
4. Model training: SVM (Support Vector Machine) is a commonly used classification and regression analysis method. It separates different categories of data by finding the optimal hyperplane, maximizing the classification interval between the two types of data.

3.3 Safety Control Technology Strategies

To improve the accuracy and practicality of location technologies, big data and artificial intelligence technologies should be utilized, and machine learning algorithms should be applied to intelligently identify and predict hazard points in substation maintenance sites, providing more accurate location information for maintenance personnel and reducing the risk of accidents. In substation maintenance sites, data from various sensors should be fused to improve the accuracy of location and the accuracy of the model. Applying augmented reality (AR) technology, which integrates virtual information with the real world, can enable maintenance personnel to better understand the equipment structure and thus solve the problem of operational errors. Relevant parties should strengthen the management of on - site maintenance work and strictly follow the operation procedures for maintenance (see Figure 1). At the same time, develop intelligent wearable devices for maintenance personnel to obtain their location information in real - time and monitor them in real - time to ensure safety.