4121 results about "Electric shock" patented technology

The invention relates to the technical field of electrical performance testing, and particularly discloses a method and system for evaluating the electric shock life of an arc extinguish chamber of a low-voltage circuit breaker, and the method comprises the steps: S1, collecting real-time arc extinguish performance index parameters in the arc extinguish chamber of different low-voltage strength grades in a preset time period and the cumulative number of closing operations of the circuit breaker of different low-voltage strength grades; s2, simulating an arcing process change image of each closing operation of the circuit breaker based on real-time arc extinguishing performance index parameters in the arc extinguishing chamber with different low-voltage strength grades, establishing an arc extinguishing three-dimensional model, and performing feature extraction analysis on the arcing process change image to obtain a standard arc state coefficient; s3, inputting the real-time arc extinguishing performance index parameter and the standard arc state coefficient into a preset analysis model for prediction analysis, and obtaining an arc extinguishing prediction value; and S4, inputting the predicted arc extinguishing value, the cumulative number of closing operations and a historical evaluation factor into the predicted analysis model for training to construct an arc extinguish chamber electric shock life evaluation model.

The invention relates to the technical field of power distribution cabinets, and discloses a power distribution cabinet with a self-adaptive environment adjusting mechanism, and the power distribution cabinet comprises a cabinet body which is used for fixing and supporting internal electrical elements; the automatic dehumidification assembly is mounted on the outer side of the cabinet body and is used for dehumidifying the cabinet body when detecting that the moisture content in the cabinet body is too high; the cleaning assembly is installed on one side of the cabinet body and used for conducting anti-blocking treatment on a filter screen arranged outside the cabinet body, and the driving assembly is installed outside the cleaning assembly and used for driving the cleaning assembly. By adding the automatic dehumidification assembly, the humidity in the power distribution cabinet can be effectively reduced, and the risk of electrical short circuit caused by a humid environment is reduced. By discharging moisture, safe operation of electrical equipment is guaranteed, and fire and electric shock accidents caused by moisture are avoided. And meanwhile, corrosion and aging processes can be slowed down, the service lives of the power distribution cabinet and internal components are remarkably prolonged, and the maintenance and replacement cost is reduced.

The invention belongs to the technical field of electrical safety, and particularly relates to a human body electric shock protection method and system based on multi-parameter fusion, multi-dimensional characteristic parameters are formed by extracting a high-frequency harmonic component, a voltage abrupt change slope and a magnetic field intensity fluctuation value of a residual current waveform, and the weight is dynamically adjusted according to the instantaneous change rate of each characteristic, so that the human body electric shock protection is realized. Generating a weighted feature vector; and a comprehensive criterion value is calculated in combination with a preset rule base and is compared with a dynamic threshold value, so that whether the circuit breaker is triggered to act or not is determined. According to the method, through fusion analysis of a plurality of physical characteristics, the identification capability of the system in a complex electromagnetic environment is improved, the probability of misoperation caused by external interference is effectively reduced, the action accuracy and stability of the circuit breaker are improved, and the power utilization safety and the power supply continuity are guaranteed.

The invention relates to the field of electric power engineering construction safety management, and particularly discloses an electric power engineering construction safety management system based on multiple sensors. By monitoring the relative deviation distance and direction of the gravity center point, the transfer speed and direction of the gravity center point, the inclination angle and direction of the body and the number and the supporting area of supporting framework joint points corresponding to various postures of the overhead working personnel in the electric power engineering construction process, the falling risk of the overhead working personnel is recognized; monitoring the distance between each easily-impacted part of the body of the aerial working personnel and an object adjacent to the part and the activity coefficient of the object adjacent to each easily-impacted part in the electric power engineering construction process, and identifying the collision risk of the aerial working personnel; the distance between high-altitude operation personnel and all surrounding electrified bodies in the electric power engineering construction process is monitored, the electric shock risk of the high-altitude operation personnel is recognized, recognition and evaluation of various safety risks of the high-altitude operation personnel in the electric power engineering construction process are achieved, and personnel safety is guaranteed.

A tool for hanging and disassembling a grounding wire of a power transmission line tower through an unmanned aerial vehicle comprises the unmanned aerial vehicle, a detachable connecting rod frame is installed on the unmanned aerial vehicle, and two hanging rings are connected to the bottom end of the connecting rod frame. And the high-altitude falling risk and the induced electric shock hidden danger caused by manual tower climbing are thoroughly eliminated. An operator can perform remote control on the ground and is prevented from being directly exposed to a high-voltage electric field and a severe tower environment, so that the life safety of the operator is fundamentally guaranteed, and the system conforms to the development trend of'few-person and unmanned 'operation and maintenance of an intelligent power grid. The unmanned aerial vehicle can quickly pass through complex terrains to approach an operation point, is particularly suitable for special tower positions such as mountainous areas and cross rivers, greatly improves the operation efficiency, and remarkably improves the operation safety. A traditional manual grounding wire hanging and dismounting mode is changed, the device is not influenced by the terrain and the tower type, the operation process is convenient and fast, the maintenance operation time is shortened, the labor intensity is reduced, and the personal safety is ensured.

The invention discloses a construction site personnel electric shock prevention early warning method and system fusing UWB and AI. The method comprises the following steps: acquiring data of spacing between personnel and electrified equipment in real time, eliminating multipath interference by adopting a subspace projection algorithm, and generating an optimized distance in combination with a self-adaptive Kalman filtering algorithm; constructing a multi-dimensional trend vector fusing the distance change rate, the environmental parameters and the equipment voltage, and inputting a voltage-sensitive LSTM model to predict a dynamic risk probability; and calculating a dynamic safety threshold based on voltage-risk nonlinear mapping, and triggering a three-level early warning mechanism. Through multi-path interference suppression, dynamic risk assessment and a grading early warning system, accurate safety management and control in a high-risk environment are realized, the early warning precision and response speed of a high-voltage operation scene are remarkably improved, and the false alarm rate is reduced to 3% or below.

The invention discloses an intelligent charging method of a vehicle-mounted storage battery and a related product, which can be applied to the technical field of vehicles, and the method comprises the following steps: determining a current gear of a vehicle; when the current gear is an ACC gear or an OFF gear, the voltage of a vehicle-mounted storage battery is detected through a remote terminal, and a first detection result is obtained; when the first detection result is smaller than or equal to a preset power shortage threshold value, sending a power supplement prompt to a user APP based on a cloud platform, and requesting and waiting for authorization feedback of a user; and when the authorization feedback is authorization agreement, charging the vehicle-mounted storage battery through a power battery. Therefore, before the charging action and the high-voltage power-on of the whole vehicle are implemented, the user authorization is obtained through the user APP, the user is fully informed that the high-voltage power-on action of the whole vehicle is about to be adopted, the risk of high-voltage electric shock caused by the situation that the user is using or maintaining the vehicle is avoided, and the charging safety is improved.

The invention relates to the technical field of electric power conductive parts, in particular to a busbar using a conductive extrusion molding material as a shield, which comprises the following steps: S1, selecting a high-voltage insulating conductive material; s2, raw material pretreatment quality detection; s3, carrying out extrusion molding on the high-voltage insulating layer; s4, extruding and coating the conductive shielding layer; s5, carrying out secondary extrusion molding on the double-layer insulation structure; s6, processing the cutting edge of the busbar; s7, bending and forming the busbar; s8, peeling and punching the busbar; and S9, packaging and quality assurance testing. The 70% high-voltage insulating layer (crosslinked polyethylene) is used for providing the excellent dielectric strength of at least 35 kV / mm, electric shock and short circuit accidents are effectively prevented, safe operation of a power system is ensured, the 30% high-purity copper or aluminum alloy conductive shielding layer achieves the electromagnetic shielding effectiveness larger than or equal to 80 dB, electromagnetic interference (EMI) is remarkably inhibited, and the service life of the cable is prolonged. The influence of electromagnetic noise on surrounding equipment is reduced, and the stability and reliability of the system are improved.

The invention discloses a low-voltage circuit breaker for a photovoltaic switch, which comprises a low-voltage circuit breaker body and a pluggable fixed shell arranged on the right side of the low-voltage circuit breaker body, and a first transparent shell and a second transparent shell which are movable are arranged on the left side of the fixed shell. According to the invention, by rotating the rotating block, the first transparent shell and the second transparent shell can cover the switch on the low-voltage circuit breaker, so that the switch is prevented from being touched by mistake during use, the electric push rod drives the arc-shaped locking block to move up and down, so that the arc-shaped locking block locks the limiting groove in the rotating block through the limiting block, and the safety of the low-voltage circuit breaker is improved. When a low-voltage circuit breaker is disconnected and a maintainer carries out maintenance on a fault circuit, the protection switch is prevented from being pushed to be closed by a person who does not know the condition, the phenomenon of electric shock caused by the maintenance worker is avoided, and only the maintainer can separate the arc-shaped locking block from the rotating block, so that the maintenance efficiency is improved. Therefore, the operation on the switch on the low-voltage circuit breaker is unlocked.

The invention belongs to the technical field of distribution network electric power operation and maintenance equipment, and particularly relates to an intelligent high-altitude branch pruning device and a pruning method.The pruning method comprises the following steps that an electric impact high branch saw is fixedly installed at the front end of a mechanical arm of a robot walking along the line, and remote control is adopted; the along-line walking robot is in adsorption butt joint with the lifting unmanned aerial vehicle through the electromagnet, the unmanned aerial vehicle lifts the along-line walking robot to the overhead wire to be placed, the along-line walking robot is remotely controlled to advance and retreat along the overhead wire, and the robot arm is controlled to complete all-angle operation. And starting and stopping of the lopper saw operation are controlled and implemented. The along-line walking robot works along the line, electric shock accidents caused by high-altitude close-range contact of operators with high-voltage wires are avoided, high-altitude falling is prevented, the life safety of the operators is guaranteed, the labor intensity is reduced, and the automation level of distribution network maintenance is improved.

The utility model belongs to the technical field of leakage protectors, and particularly relates to an alternating current screen leakage protection circuit and device, and the circuit comprises a power management circuit which comprises a molded case switch and is used for the on-off of the current of an electrical load; and the breaking control circuit is connected with the power supply management circuit. According to the utility model, through cooperation of the power management circuit, the breaking control circuit, the electric leakage monitoring circuit and the connection control circuit, a setting value can be adjusted according to characteristics of an actual electrical load, an electric leakage current in an electrical load loop can be monitored in real time, and once it is monitored that the electric leakage current exceeds a preset setting value, the electric leakage current is monitored to be abnormal. The power supply can be quickly and automatically cut off to prevent electric shock, fire and other dangerous situations caused by electric leakage, the problem that traditional equipment is insensitive to small current leakage is effectively solved, the use flexibility is improved, and meanwhile, the safety and efficiency of electrical load equipment are remarkably improved.

A mouse trap comprises a shell, which comprises a base and an upper shell mounted above the base, wherein an electric shock device, a mouse pressing device and a locking device are arranged in the shell; the electric shock device comprises a conductive element, the mouse pressing device is movably mounted on the top wall of the shell and extends downwards towards the base, and the bottom end of the mouse pressing device is positioned above the conductive element of the electric shock device.

The invention provides a photovoltaic system and power distribution network state cooperative monitoring method based on the Internet of Things, and the method comprises the steps: deploying a multi-point collection device in a key region of a photovoltaic power station through a sensor network, and obtaining the soil humidity change and soil conductivity at regular time; denoising and standardizing the acquired soil humidity change and soil conductivity data to generate a standardized environmental parameter matrix; according to the dynamic change trend of grounding grid corrosion, identifying the mapping relation between the soil environment parameters and the grounding resistance value, and combining the real-time environment parameters and the corrosion trend to predict the resistance change; and comparing the predicted resistance change with the current grounding resistance value in real time, if the current grounding resistance value is detected to exceed a safety threshold range, triggering an abnormal early warning signal, and determining a potential area with high electric shock risk according to the resistance deviation degree and the corrosion rate.

The invention discloses a charging over-temperature detection system and method for a direct-current charging gun, and relates to the technical field of direct-current fast charging, and the system comprises a temperature collection module, a signal conditioning circuit module, a micro-control module, a power regulation module and a control execution module. According to the invention, the stable charging power is maintained, and the temperature of the charging gun is kept in a reasonable range, so that the problems of resistance increase, limited charging power and the like caused by over-temperature are avoided, the relatively stable charging power is maintained, the prolonging of charging time is reduced, the energy utilization rate is improved, and the charging efficiency is improved by reasonably controlling the temperature of the charging gun. Energy loss caused by overheating is reduced, the utilization rate of energy is improved, and the charging process is more efficient and energy-saving; potential safety hazards such as insulation performance reduction, part damage short circuit and thermal runaway caused by overheating can be effectively prevented, accidents such as fire disasters and electric shock are avoided, the safety of users and equipment is guaranteed, and the service life of a battery is prolonged.

A safety device for a DC grid includes a voltage measuring device between a potential line and a reference potential line, and a protective circuit for reducing an electric shock caused by Y-capacitors of the electric DC grid. The protective circuit includes a circuit breaker between the respective potential line and the reference potential line. A plurality of tripping criteria are predefined and the first circuit breaker and / or the second circuit breaker can be actuated so as to close exclusively in the event of all predefined tripping criteria being met as determined by the first voltage measuring device and / or by the second voltage measuring device.

The utility model discloses a high-voltage breaking circuit and a high-voltage test box, and relates to the technical field of energy storage. The high-voltage breaking circuit disclosed by the utility model is arranged between a battery module and an inverter, the high-voltage breaking circuit comprises a contactor, a time relay, a fuse and a molded case circuit breaker, a first end of the contactor is connected with a direct current output end of the battery module, a control end of the contactor is connected with the time relay, and a second end of the contactor is connected with the molded case circuit breaker. The second end of the contactor is connected with the first end of the fuse, the second end of the fuse is connected with the first end of the molded case circuit breaker, and the second end of the molded case circuit breaker is connected with the input end of the inverter; wherein the time relay is used for controlling the timing function to be started after being started and controlling the contactor to be closed after timing is finished, so that a main loop between the battery module and the inverter is conducted. According to the circuit, the safety of field personnel can be ensured through various means, and the personnel can be transferred to a safe place at the moment of switching on, so that electric shock accidents are avoided.

The invention discloses an automobile charging equipment slot and a use method, the automobile charging equipment slot comprises a charging pile, the side surface of the charging pile is provided with a slot body, and a charging gun is inserted into the slot body; the anti-falling rack is rotationally connected to the front side of the slot body at an equal angle, and the end part of the anti-falling rack is clamped with the concave edge of the outer side of the charging gun; and the sealing plate is slidably connected into the storage groove, and the storage groove is formed in the inner wall of the slot body. According to the automobile charging equipment slot and the use method, during use, the charging gun and the slot body can be subjected to reinforcing and anti-loosening treatment, and the problems that when the charging gun is put back into the slot, the charging gun is not firmly fixed by the slot, the charging gun is likely to slide out of a charging port, and an electric shock accident is likely to be caused are avoided; the slot body can be automatically closed, and dust and rainwater are prevented from entering the slot.

The utility model discloses an anti-electric shock power distribution cabinet, which comprises a cabinet body, a cabinet door is rotatably arranged at the left end of the front side of the cabinet body, a handle is welded in the middle of the right end of the front side of the cabinet door, a movable back plate is arranged in the cabinet body, and an electric appliance element is fixedly arranged on the surface of the front side of the movable back plate. The electric shock prevention power distribution cabinet comprises a cabinet body, a movable back plate is arranged in the cabinet body, sliding rails are arranged at the upper end and the lower end of the movable back plate in a bilateral symmetry mode, the sliding rails are fixedly connected with the inner wall of the cabinet body, the sliding rails are slidably connected with the movable back plate, and an adjusting unit is arranged on the rear side of the movable back plate. Therefore, the electric appliance elements are automatically moved out, a larger operation space is provided for maintainers, meanwhile, the electric shock prevention unit can effectively prevent electric shock accidents caused by the fact that the electric appliance elements are not powered off in time in the maintenance process of the maintainers, and the safety of the maintenance process is greatly improved.

The utility model discloses a UPS (Uninterrupted Power Supply) input power distribution cabinet with high safety performance, comprising a main body assembly which comprises a power distribution cabinet body; the electric leakage assembly comprises a mounting groove, a fixed pipe, a spring, a side connecting block and a connecting rod; the mounting groove is formed in the front end of one side of the outer surface of the power distribution cabinet body, the fixed pipe is fixed to the front end of one side in the power distribution cabinet body, the spring is installed in the fixed pipe, the side connecting block is connected to the other side of the spring, the connecting rod is fixedly connected to one side of the outer surface of the side connecting block, the track is fixed to the inner wall of the power distribution cabinet body, and the movable plate is slidably installed in the track. The metal sheet is connected to one end of the outer surface of the movable plate, and the test pencil is installed in the movable plate. According to the utility model, the problems that electric leakage occurs in a conventional power distribution cabinet, but electric leakage detection can be carried out in the power distribution cabinet only when an operator needs to open a cabinet door of the power distribution cabinet, and when the operator opens the cabinet door, electric shock risks may be brought to maintenance personnel are solved.

The invention discloses an electric shock protection method for a low-voltage power distribution network, and belongs to the field of electric shock protection of low-voltage power distribution networks. Decomposing the residual current signal into IMF components based on VMD; total energy of IMF components is calculated, and energy values of different frequency bands are used as features; inputting the features into a pre-constructed electric leakage fault type identification model, wherein the electric leakage fault type identification model identifies different electric leakage scenes; and based on the electric leakage scene identification result, executing a protection criterion. According to the method, the electric shock current component is accurately extracted from the complex residual current waveform, the degree of an electric shock accident is reflected, after the electric shock current is obtained, different action measures are executed according to the effective value of the current, and RCD protection misoperation caused by interference factors and refusal action in the electric shock state are effectively prevented.

AED pulse generation circuits that provide floating, adjustable, bias voltages for driving a solid-state defibrillation waveform therapy generator circuit are provided. The provided bias voltages allow to reverse polarity of provided electric shock to increase chances of successful defibrillation and survival. In one of the provided configurations, energy stored in the pulse capacitor can be discharged by activating the waveform therapy generator in the high-resistance transconductance region. The circuits can be positioned on a self-contained module potted with an insulating material to reduce unintended interactions with other AED components. Through the use of the disclosed circuits, AED size can be reduced to promote pocketability while simultaneously increasing AED reliability.

The invention relates to the technical field of illumination optical fiber manufacturing, in particular to a photoelectric separation safety illumination line, a preparation method thereof and an illumination system. The optical fiber comprises a core layer, a wrapping layer and a protective layer, the wrapping layer is coated on the outer surface of the core layer and adopts a resin coating layer, and the protective layer is arranged on the outer surface of the wrapping layer; the photoelectric separation lighting line which is low in energy consumption, safe, reliable and high in lighting brightness is provided, through the photoelectric separation design, optical fibers are connected to LED lamp beads, optical signals are received, safety and environmental protection are achieved, environmental protection is achieved, no electric spark is generated, no electromagnetic interference is generated, no heat is generated, and therefore the surrounding environment cannot be affected; potential safety hazards are avoided; wireless energy transmission between the power supply module and the light source is realized by adopting a magnetic resonance coupling or electromagnetic induction technology, so that the electric shock risk caused by traditional wire connection is eliminated, and the safety of installation and use is improved.

The invention belongs to the technical field of offshore refueling, and discloses helicopter offshore platform refueling equipment, and a bearing bracket of an oil storage unit of the helicopter offshore platform refueling equipment comprises a fixed bracket, a sliding bracket for mounting a tank box assembly and a release mechanism; a first sliding face is arranged on the fixed support, the sliding support is arranged above the fixed support and provided with a second sliding face matched with the first sliding face, the releasing mechanism has the state of locking the sliding support and the state of releasing the sliding support, and the sliding support can slide down along the fixed support under the action of self gravity when being released. The pump skid unit of the refueling equipment is used for pumping fuel oil in the tank box assembly into the refueling skid unit, and finally refueling is conducted on the helicopter through the refueling gun. An electrostatic grounding protection reel is arranged in the refueling pry unit, the refueling gun is communicated with an outlet of the oil pump assembly, the electrostatic grounding protection reel comprises a grounding clamp, and a grounding needle is arranged on the inner wall of the clamping end of the grounding clamp in a protruding mode. The refueling equipment can deal with safety accidents in emergency, reduce the risk of electric shock and eliminate potential safety hazards.

A safety socket comprises a socket body and a panel covering one side of the socket body, outer jacks of the panel correspond to inner jacks of the socket body, a protection assembly sliding along a straight line is arranged in an accommodating cavity between the panel and the socket body, the protection assembly comprises a protection cover and a shifting piece, and the shifting piece is arranged in the accommodating cavity. The protective cover blocks the mutual communication between the inner jack and the outer jack, and the operation end of the shifting piece extends out of the containing cavity and is used for driving the protective cover to translate in the containing cavity, so that the connecting jack formed in the protective cover corresponds to the inner jack and the outer jack respectively. According to the utility model, the protection assembly is arranged between the panel and the socket body, and the protection cover is arranged between the inner jacks and the outer jacks in a blocking manner, so that the inner jacks can be prevented from being contacted from the outside, electric shock is avoided, dust can be prevented, only the operation end needs to be shifted when the socket needs to be used, and the socket has the advantage of convenience in operation.

The invention relates to the technical field of power distribution cabinets, and discloses an anti-electric shock outdoor power distribution cabinet, which comprises a power distribution cabinet, a power-off switch arranged in the power distribution cabinet, a wiring groove arranged on the power-off switch, and a wiring terminal arranged in the wiring groove, the extension part is fixed below the power-off switch and corresponds to the wiring groove, an insulating strip is mounted on the extension part, a power connection fork is rotationally mounted at the top of the insulating strip through a torsional spring, the torsional spring applies torsional force away from the binding post to the power connection fork, and a wire penetrates through the power connection fork and extends out of the tail end of the power connection fork; an insulating wrapping layer is arranged on the top, away from the binding post, of the insulating strip. According to the invention, when the power is cut off through the power-off switch, the wire can be disconnected from the binding post, and the exposed part of the wire can be wrapped in an insulating manner, so that the risk that the exposed wire possibly carries residual current to cause electric shock to maintenance personnel in subsequent maintenance is avoided, and the potential safety hazard is reduced.

The utility model discloses a dust collector automatic dust collection charging seat with a display screen, which can display the operation condition of equipment in real time and improve the visualization of the equipment through the design of the display screen, so that corresponding parts can be overhauled and adjusted in time, and the efficient and stable operation and the convenience of operation and use of the dust collection charging seat are ensured. The charging structure is provided with the charging frame with the clamping opening and the conical guide groove, the positioning stability during charging of the dust collector can be improved, the charging assembly avoids the problem of electric shock caused by mistaken touch of the conducting strip through the designed linkage piece and the micro switch at the corresponding position, and the use safety of the charging assembly is improved; and the top of the dust collection structure is laterally assembled and matched with a bottom positioning structure which is embedded, assembled and clamped with an upper positioning ring and a lower positioning ring, and an air outlet filter piece embedded assembly structure provided with a pull rod, so that the convenience of disassembly and assembly operation of the dust collection filter structure is improved. Compared with a common dust collection charging seat, the dust collection charging seat can achieve the functions of efficient dust collection, safe charging and convenient disassembly, assembly and maintenance.

The invention relates to a transformer through-flow test voltage regulator based on a single-phase adjustable transformer, and relates to the field of power system relay protection. A voltage regulating unit and a remote control unit are arranged, and the voltage regulating unit comprises an air switch, a switching power supply and an electric voltage regulator which are connected with the air switch, a voltage regulating liquid crystal screen and a voltage regulating PCB. The voltage regulation PCB comprises a voltage regulation single chip microcomputer, a voltage regulation communication module, a voltage regulation stabilizer, a temperature acquisition module, a current acquisition module, an AD acquisition module, a two-way relay module, a voltage acquisition module and a current transformer; the remote control unit comprises a remote control liquid crystal screen and a remote control PCB. The remote control PCB comprises a charging chip, a USB charging port, a lithium battery, a remote control single-chip microcomputer, a remote control voltage stabilizer and a remote control communication module. The voltage regulation communication module is in communication connection with the remote control communication module. Under the condition, three-phase split-phase operation and remote control of experimental instruments can be realized, electric shock of personnel is prevented, and four safety protection modes are provided.

The utility model relates to the technical field of outdoor high-voltage vacuum circuit breakers, and discloses an outdoor high-voltage vacuum circuit breaker with an isolating switch, the top of a base is fixedly connected with a circuit breaker body, the middle part of the front side of the base is fixedly connected with a fixed shell, and the two sides of the fixed shell are fixedly connected with electric push rods. A clamping plate is fixedly connected to one side of the electric push rod, a connecting base is fixedly connected to the middle of the front side of the circuit breaker body, a winding roller is rotatably connected to the interior of the connecting base, an electric wire is arranged on the winding roller, and an isolating switch is fixedly connected to the bottom of the electric wire; a servo motor, a winding roller, an electric wire and the like are arranged to be matched with the disconnecting switch for use, the servo motor drives the winding roller to rotate so as to unwind the electric wire, the electric wire drives the disconnecting switch to move downwards so as to move to the position below the circuit breaker body, and therefore the danger of electric shock caused by an operator in the using process can be prevented; and a response can be conveniently and quickly made in an emergency.

The present invention relates to the technical field of distribution cabinets, and discloses an anti-electric shock outdoor distribution cabinet, including a distribution cabinet, in which a power-off switch is installed. The distribution cabinet further includes: a wiring groove opened on the power-off switch, and a wiring post is arranged in the wiring groove; an extension part fixed below the power-off switch and corresponding to the wiring groove, an insulating strip is installed on the extension part, a power connection fork is rotatably installed at the top of the insulating strip through a torsion spring, and the torsion spring applies a torsional force to the power connection fork to move it away from the wiring post, and a wire is threaded through the power connection fork and extends from its end, and an insulating wrapping layer is provided at the top of the insulating strip away from the wiring post. When the power-off switch cuts off the power, the present invention can not only disconnect the wire from the wiring post, but also insulate and wrap the exposed part of the wire, avoiding the risk of electric shock to the maintenance personnel during subsequent maintenance caused by the residual current that the exposed wire may carry, and reducing potential safety hazards.

The invention provides a cable fault arc temperature distribution calculation method based on multi-physics field coupling, and the method comprises the steps: building a cable fault arc simulation model; setting boundary conditions of multi-physics field coupling of an electric field equation, a magnetic field equation, a fluid heat transfer equation and a laminar flow equation for the cable fault arc simulation model; the arc temperature distribution is obtained by controlling the voltage and current parameters of the arc simulation loop, the distance between the copper core conductor and the grounding electrode and the air velocity. A cable fault arc simulation model is built, high risks of electric shock and explosion in laboratory tests are avoided, the loss cost of laboratory test equipment is reduced, the defect that only the peripheral temperature of the arc can be measured in the laboratory tests is overcome through a multi-physics field coupling equation, and global continuous arc temperature data are obtained. And a theoretical basis is provided for power system protection design, cable laying optimization, fire-fighting strategy formulation and cable fire risk assessment.