70results about How to "Improve protection reliability" patented technology

According to the invention, the internal association relationship between the fault working condition attribute and the fault feature is mined, and the fault information fusion-based power system transient protection method is provided. The fault information fusion method adopts a Kalman filtering algorithm and an improved Kalman filtering algorithm, or adopts a particle filtering algorithm or an improved particle filtering algorithm. And the fault can be reflected more accurately by fusing the standard fault characteristics of the fault working condition attributes. According to the power system transient protection method based on the fault working condition attribute, the adverse effect of the fault initial phase angle and the transition resistance on protection is overcome, and the transient protection reliability is improved.

The invention discloses a measurement switch protection function misalignment analysis and switching protection method, which comprises the following steps of: establishing a current mapping relation between a measurement unit and a protection unit in a measurement switch, and a verification relation between the measurement unit and electric quantity data of an electric energy meter; the measurement unit and the protection unit carry out current data interaction and mutual verification, and whether a correct current relation is satisfied is judged according to a current mapping relation between the measurement unit and the protection unit; the measuring switch collects electric quantity data of the electric energy meter, and judges whether the electric quantity relation between the measuring unit and the electric energy meter is changed or not according to the verification relation between the measuring unit and the electric quantity data of the electric energy meter; the protection unit judges whether the sampling current is abnormal or not according to the verification result of the measurement unit. The invention further discloses a measuring switch. According to the invention, the technical problems of performing misalignment analysis and abnormity monitoring on the protection function of the measurement switch, reducing the risk of abnormal tripping and improving the reliability of the system are solved.

The utility model relates to a front liquid drainage type socket shell and car charging socket, relate to charging socket technical field for car, front liquid drainage type socket shell includes: shell body, protection wall, the hole insulator of car charging socket is embedded in shell body, the insertion end of hole insulator stretches out to the front end of shell body, the protection wall is surrounded in the outside of insertion end of hole insulator, forms the cavity for insertion between insertion end and protection wall, one end of protection wall is integrally formed fixed connection in the front panel of shell body, the other end of protection wall extends to the front end of shell body, the first liquid drainage channel is set up in the junction of protection wall and front panel, relative to traditional rear end liquid drainage, the utility model reduces the risk that liquid leaks in the rear end of socket and the electric connection in car, enhances waterproof security, does not need the liquid drainage component such as hose in the rear end of shell body, reduces the frequency of user inspection maintenance, improves the applicability, convenience and reliability of car charging socket.

The invention discloses an intelligent direct-current circuit breaker electronic release which comprises a self-powered multi-switching-value input acquisition circuit, a double-path redundant current acquisition circuit, a double-path voltage acquisition circuit, a memory circuit, a CAN communication circuit, a control circuit and an output circuit. The control circuit respectively reads information of the self-powered multi-switching-value input acquisition circuit, the dual-path redundant current acquisition circuit, the dual-path voltage acquisition circuit and the memory circuit and then outputs the information to the CAN communication circuit and the output circuit; according to the invention, remote and local opening and closing operations of the circuit breaker can be identified, redundant current can be collected to realize a protection function, the contact state of the circuit breaker can be identified and evaluated, the electrical life times of the circuit breaker can be calculated, and the state of an operating mechanism of the circuit breaker can be judged; according to the invention, intelligent monitoring of the state of the circuit breaker and intelligent control of the circuit breaker are realized, and data support is provided for auxiliary intelligent decision making of the circuit breaker.

The invention discloses a tension testing device for cable detection, and relates to the field of tension testing devices, the tension testing device comprises a testing rack, the testing rack is movably provided with a testing pull-up seat, and the testing pull-up seat is provided with a pull-up clamp; the device further comprises a cable position detection device, and the cable position detection device is installed on the test rack. It needs to be explained that in the embodiment of the invention, sudden stop is triggered through mechanical swing of the cable holder, the skew fault can be identified in the initial stage, the tension coaxiality deviation caused by skew cable clamping and deformation and sinking of the pull-up seat is avoided, and the major safety accident of cable collapse is effectively avoided; according to the cable tension test device, the test data distortion caused by such factors is eliminated, the accuracy and repeatability of a cable tension test result are ensured, meanwhile, through reverse mechanical triggering, real-time detection and sudden stop of tiny deformation and sinking of the pull-up seat are realized, and hidden safety hazards are eliminated in advance.

The invention discloses a power transmission tower safety rope releasing device based on an unmanned aerial vehicle and a releasing and recycling method.The releasing device comprises an unmanned aerial vehicle hanging frame, a driven wheel, a rack and a driving wheel, the driven wheel is installed on the unmanned aerial vehicle hanging frame, and one side of the top end of the rack is hinged to the unmanned aerial vehicle hanging frame in an overturning mode; the other side of the top end of the rack is connected with an unmanned aerial vehicle hanging frame through an electric release pin. The driving wheel is installed on the machine frame, and a safety rope is clamped and fixed between the driving wheel and the driven wheel. Based on the releasing device and the releasing and recycling method, the releasing and recycling efficiency, reliability and convenience of the safety rope are improved.

The invention relates to the technical field of coatings, in particular to dual-curing conformal coating as well as a preparation method and application thereof. The dual-curing three-proofing paint is composed of siloxane containing oxazolidinyl groups, a UV oligomer containing isocyanate groups, a diluting monomer, a water removal agent, a photoinitiator, a wetting agent, a catalyst and the like. Wherein the siloxane containing the oxazolidinyl group has two functional groups of long carbon chain oxazolidine and siloxane, the long carbon chain oxazolidine can realize rapid moisture curing of oligomer and does not generate volatile harmful substances, and meanwhile, hydrolysis residues of the long carbon chain oxazolidine can plasticize the conformal coating and reduce adhesion loss caused by shrinkage. On the other hand, siloxane groups can form a stronger physical or chemical action with a base material, so that the adhesive force to the base material is improved. In conclusion, the three-proofing paint has excellent low surface tension and high wettability, can effectively wet the polluted surface of the PCB and form interaction, has the characteristics of excellent adhesive force, salt mist resistance, high flexibility and the like, and has very high market application value.

The present invention relates to the field of lightning electromagnetic pulse protection technology, and in particular to a lightning electromagnetic pulse protection device. In order to reduce the probability of collision and impact damage of external debris on the device and improve the working reliability of the device, the present invention comprises a shell, the two ends of the shell are provided with wiring terminals, a protection module is arranged in the shell, an anti-collision cylinder is arranged outside the shell, a plurality of rib connection groups are connected between the anti-collision cylinder and the shell, each rib connection group comprises two rib connection plates connected at the ends and arranged at an angle, in each rib connection group, the connection between the two rib connection plates is fixedly connected to the shell, and the other end of the rib connection plate is fixedly connected to the anti-collision cylinder, the anti-collision cylinder intercepts possible foreign objects, protects the shell and the protection module in the shell, reduces the influence of external impurities on the device, improves the heat dissipation efficiency in the anti-collision cylinder through heat dissipation ribs, and improves the heat dissipation efficiency of the protection module.

The invention discloses a line protection method suitable for a power distribution network containing an unknown load branch, and the method comprises the steps: obtaining three-phase current at two ends of a protection interval, and extracting a positive-sequence component of the three-phase current to obtain a sampling sequence; according to preset windows and step length sliding grouping, calculating waveform similarity of the corresponding windows; solving an energy operator corresponding to the similarity of each window; according to an energy operator, whether a first threshold value is exceeded or not is judged firstly, and if not, no fault exists; and if so, judging whether the front-to-back ratio of the energy operator exceeds a second threshold value, if so, judging the section as a fault section, and otherwise, judging no fault. According to the method, the problem of maloperation of traditional fault protection caused by unknown load branch or distributed new energy input in the power distribution network is solved.

The utility model discloses a maintainable high-temperature sodium battery pack, which comprises a box body assembly, a nanometer heat preservation assembly, a battery core assembly and a BMS (Battery Management System) module, the box body assembly comprises a top cover, a lower box body and a first sealing ring arranged in the top cover; the BMS module is arranged on the surface of one side of the lower box body, the battery cell assembly is arranged in the nanometer heat preservation assembly, openings matched with an output module of the battery cell assembly are formed in the opposite positions of the lower box body, the nanometer heat preservation assembly and the BMS module, and a second sealing ring is further arranged at the opening of the BMS module; the output module of the battery core assembly sequentially passes through the opening and is arranged in the BMS module; the nanometer heat preservation assembly is arranged in the lower box body, the top cover is arranged on the top of the lower box body through a first sealing ring, and the top cover and the lower box body are fixedly connected in a threaded connection mode.

The utility model relates to the field of basement waterproofing, and discloses a drainage protection plate and a basement side wall structure, the drainage protection plate comprises a drainage layer, an isolation layer and a self-adhesive layer, the drainage layer is provided with a plurality of first cup bodies which are arranged at intervals and protrude towards the back side, the isolation layer is arranged on the back side of the drainage layer, and the self-adhesive layer is arranged on the isolation layer. The self-adhesive layer is arranged on the side face, opposite to the drainage layer, of the isolation layer. The drainage protection plate has good structural strength, impact resistance and connection strength, is not prone to being damaged or falling off in the backfill process of backfill soil, and is high in protection reliability of the waterproof layer.

The application provides a primary and secondary fusion column circuit breaker protection adjustment method, comprising: collecting voltage phase data and current waveform data from three-phase positions of a bus in real time, obtaining photovoltaic grid-connected point output proportion and reactive power injection amplitude sequence during low voltage ride through, and reading current district photovoltaic penetration from a district configuration file; according to the voltage phase data and the reactive power injection amplitude sequence, correcting phase offset of each period according to the change rule that reverse power flow gradually increases with the increase of output during photovoltaic output climbing, calculating the initial discrimination range of the maximum sensitivity angle of the directional element; taking the corrected discrimination angle width as an effective window for phase comparison, comparing the current bus voltage phase with the reactive power injection amplitude, identifying the phase pullback phenomenon caused by low voltage ride through, and extracting the phase swing characteristics of the bus voltage.

The utility model discloses a state monitoring assembly for a wire harness, and relates to the technical field of wire harness monitoring equipment, the state monitoring assembly comprises a monitor main body and a data line, the data line is provided with a protective sleeve, the data line comprises a joint and a lead, the protective sleeve comprises an inner-layer soft sleeve, a top fixing lantern ring and a bottom fixing lantern ring, the inner-layer soft sleeve is detachably installed on the joint, and the top fixing lantern ring is detachably installed on the lead. The inner-layer soft sleeve comprises a top plate, a base and a connecting column, the top fixing lantern ring is movably installed at the top of the inner-layer soft sleeve, the bottom fixing lantern ring is movably installed at the bottom of the inner-layer soft sleeve, a fan-shaped notch matched with a wire is formed in the side face of the protective sleeve, and the protective sleeve is arranged on the wire in a sleeving mode through the fan-shaped notch. The data line connector has the advantages of being convenient to assemble and disassemble, enhancing the protection performance and prolonging the service life, and solves the problems that a traditional data line connector is easy to damage and high in maintenance cost.

The utility model discloses a kind of general anesthesia operation intraoperative eye protection medical eyecup, and it is related to medical eyecup technical field.The utility model includes two eyecup shells, two the eyecup shell corresponding side fixedly connected with nose pad, further include protection mechanism, the protection mechanism is used to seal protection to patient eye, the protection mechanism includes sealing assembly, the sealing assembly is installed on two eyecup shells, the sealing assembly includes the two support sleeves of being fixed in the mutual far side of two eyecup shells.The utility model is by setting sealing assembly, specifically is winding roll and realizes adjustable length by the elastic fixing belt of driving shaft, adapts different head circumference to complete stable wearing, sealing silica gel ring cooperates sealing element and eye skin closely, realize self-adapting face profile telescopic compensation, and guide liquid outward, multilayer sealing structure blocks disinfectant, blood, foreign matter intrusion in eye, improves eye protection sealing property and security.

This utility model discloses an interlocking block slope protection for a plain reservoir dam, comprising several evenly arranged slope protection blocks. Each slope protection block has multiple elongated openings along its transverse direction on its front side, extending longitudinally through the block. Multiple longitudinal drainage pipes are installed within each slope protection block, with both ends of each pipe connected to the outside. Furthermore, the drainage pipes are arranged in a matrix along the longitudinal direction. Even further, a connecting pipe is provided between two adjacent drainage pipes in the transverse direction. Furthermore, a rubber pad layer is provided on the outer surface of each slope protection block. Even further, the surface of the rubber pad layer has several raised points. This utility model, by installing multiple drainage pipes inside the slope protection block and providing a rubber anti-slip layer on the outer side, enables the slope protection block to drain rainwater quickly and efficiently without losing stability under temperature changes.

The utility model discloses an intelligent anti-chemical clothing of built -in temperature and humidity monitoring relates to the technical field of protective clothing, the utility model discloses an intelligent anti-chemical clothing body, the one side of intelligent anti-chemical clothing body is connected with knapsack, the inside fixedly connected with compressed air bottle of knapsack, the inside of intelligent anti-chemical clothing body is provided with intelligent monitoring subassembly, the utility model discloses the control of exhaust valve mechanism has realized the accurate maintenance of the inside micro - positive pressure of anti-chemical clothing, when intelligent monitoring subassembly detects that the air pressure is out of limit, electric push rod starts immediately, and the funnel shape plugging block is separated from the closure block, forms the exhaust passage, and the gas is unidirectionally exhausted through the first check valve, and after the normal air pressure, the electric push rod contracts and makes the plugging block reset seal, and this movement process is through the synergetic effect of electric drive and funnel shape sealing structure, guarantees the exhaust efficiency, prevents the external contaminant reverse osmosis again, improves the protection reliability effectively while maintaining the safe micro - positive pressure.

This utility model discloses a device for temporary edge protection of steel-concrete composite beams, belonging to the field of building construction. It includes a base, with a column fixedly installed at the upper end of the base. Two sets of adjusting screws are threadedly inserted into the upper front side of the base. Fixing seats are fixedly installed on both the left and right sides of the upper end of the column via bolts. Two sets of steel cables are installed at the upper end of the base, and these steel cables are connected to the fixing seats on the left and right sides of the upper end of the column. Through the cooperation of the base, column, two sets of adjusting screws, four sets of fixing seats, and two sets of steel cables, multiple sets of protective plates are arranged and fixedly installed, thereby achieving temporary edge protection for the steel-concrete composite beam. Compared with traditional protection measures, this device, through modular design, adjustable connection structure, and the application of lightweight materials, achieves efficient coordination with processes such as steel-concrete composite beam hoisting and concrete pouring, significantly improving protection reliability and construction efficiency.

The application provides a metal pipe inner wall rust inhibitor AI spraying track planning method and system based on visual guidance, relates to the field of industrial automatic spraying technology, and the method comprises the following steps: acquiring original sequence images of a metal pipe inner wall collected by an endoscopic visual probe, performing optical distortion correction and multi-view point cloud space registration on the original sequence images to obtain an inner wall three-dimensional topological grid; extracting node coordinates and surface normal vectors of the inner wall three-dimensional topological grid, and calculating local curvature gradient distribution of the node coordinates and the surface normal vectors; performing threshold segmentation and feature boundary extraction on the local curvature gradient distribution to obtain a geometric feature partition graph of the spatial range of the thread groove bottom, the windward surface of the reinforcing rib and the weld reinforcement area. The application improves the uniformity of the coating and the protection reliability.

The invention provides a transfer cart for galvanized steel coil production, and belongs to the technical field of transfer carts. Comprising a trolley, an inner supporting assembly is arranged on the trolley, a guide fixing assembly is arranged at the front end of the inner supporting assembly, a lifting table is arranged below the inner supporting assembly, a bottom fixing assembly is arranged on the lifting table, anti-cracking assemblies are arranged on the two sides of the bottom fixing assembly, and a steel coil can be placed on the inner supporting assembly. And a hydraulic power system is arranged in the trolley. A bevel gear set is driven by a motor to adjust a guide block to be matched with the inner diameter of a steel coil, the steel coil is guided to be accurately arranged on an inner supporting assembly in a sleeving mode, alignment time consumption and operation difficulty are reduced, the steel coil is fixed through the inner supporting assembly and a bottom fixing assembly, the sliding risk is reduced, and an arc-shaped plate rotates around the axis to be attached to the side face of the steel coil to form lateral protection; and the end face fixing plate is embedded and connected in a reinforced mode, and the problem of cracking caused by vibration and inclination in the transferring process is effectively avoided.

The present invention discloses an over-temperature protection device for a motor, a motor and an over-temperature protection method thereof, the device comprising: a thermistor for sensing the current temperature of the switch tube of the motor; a voltage-dividing resistor and the thermistor are arranged in series to form a voltage-dividing branch for a preset power supply, so as to realize voltage-dividing control of the voltage-stabilizing unit and the control switch; the voltage-stabilizing unit is used to be in a shut-off state when the current temperature reaches the preset over-temperature protection point of the switch tube, so as to control the control switch to conduct in combination with the voltage-dividing branch and output a low-level signal to the controller of the motor, so that the controller controls the motor to stop according to the low-level signal. The scheme of the present invention can solve the problem of poor protection reliability in the prior art of over-temperature shutdown protection by controlling the switch of the triode, and achieve the effect of improving protection reliability.

This application relates to the field of cable protection pipe technology, and in particular to a low-temperature impact-resistant CPVC cable protection pipe, which includes a protection pipe body, an insulation layer, and a circulation mechanism. An impact-resistant mechanism is fixedly connected to the inner side of the protection pipe body. A cable body is inserted through the insulation pipe body inside the impact-resistant mechanism. A heat exchange mechanism is fixedly connected to the outer surface of the insulation pipe body. The circulation mechanism is located at the top of the protection pipe. This technical solution, through its heat exchange, circulation, impact resistance, and heat recovery structure, combined with a composite insulation layer and a suitable heat exchange medium, efficiently absorbs solar energy and recovers waste heat from the cable, continuously insulating the protection pipe body day and night, resisting external impacts, preventing low-temperature embrittlement and cable overheating, adapting to different low-temperature environments, reducing heat loss and energy consumption, and solving the problems of existing CPVC cable protection pipes such as poor resistance to low temperatures, weak impact resistance, and limited adaptability.

This utility model discloses a battery cover with airbag cushioning, relating to the field of battery covers. It includes a battery cover body, which comprises a mounting base frame, a frame-shaped rubber airbag, a movable battery cover, a plate-shaped rubber airbag, a dustproof corrugated pipe, mounting plates, and cushioning springs. The frame-shaped rubber airbag is fixedly installed on the inner wall of the mounting base frame. The movable battery cover is located on one side of the mounting base frame. The plate-shaped rubber airbag is fixedly installed on the inner wall of the movable battery cover. The dustproof corrugated pipe is fixedly sleeved on the mounting base frame and the movable battery cover. Eight mounting plates are symmetrically fixedly installed on the inner walls of the mounting base frame and the movable battery cover. By setting up a battery cover body composed of a mounting base frame, frame-shaped rubber airbag, movable battery cover, plate-shaped rubber airbag, dustproof corrugated pipe, mounting plates, and cushioning springs, a multi-dimensional, multi-layered cushioning and protection system can be formed, effectively solving the problem of traditional single-material battery covers lacking a cushioning and energy-absorbing structure.

The utility model discloses a kind of water leakage warning protection devices of water equipment, it is related to water safety protection technical field.The device includes box, main control module, water droplet sensor, water leakage protection component, alarm component and power supply unit, when water leakage is detected by water droplet sensor, the water stop of water leakage protection component is triggered by main control module Waterway is blocked, and alarm component is activated to send alarm;It is controlled by mechanical and electronic cooperation, the quick water cut-off and synchronous warning when water leakage are realized, and compact structure, response is fast, applicable to water dispenser, water purifier and a variety of water equipment, can effectively reduce the loss caused by water leakage.

This invention discloses a drone with a folding wing structure, relating to the field of drone technology. It includes an outer shell mechanism, a camera mechanism mounted on the left side of the outer shell mechanism, a wing mechanism mounted on the top of the outer shell mechanism for gliding, and a horizontal wing mechanism mounted on the bottom of the outer shell mechanism. By mounting the wing mechanism at the top, the horizontal wing mechanism at the bottom, and tail rudder mechanisms at both ends of the outer shell mechanism, a complete flight control system is formed. The wing mechanism enables the outer shell mechanism to glide, the horizontal wing mechanism provides balance and guidance for the overall structure, and the tail rudder mechanism precisely controls the flight attitude. These three mechanisms work together to improve flight stability and maneuverability. The complementary functions and structural synergy between the mechanisms enhance the reliability and flexibility of the drone's flight, improve the overall durability and protective performance of the equipment, and significantly optimize the user experience of the drone.

The utility model relates to the technical field of automobile parts production, provide a kind of injection mould and injection equipment with protection function, injection mould includes template component and protection structure, template component includes first template and second template, and the first template and second template are formed with the cavity for shaping soft rubber product between, second template is movable relative to first template, to have mold closed state and open mold state;Protection structure is arranged corresponding cavity, and protection structure includes flexible protection piece, one end of flexible protection piece is connected to first template, other end is connected to second template, flexible protection piece can be stretched or folded with the movement of second template, dynamic covers cavity, effectively prevent foreign matter from entering or material overflow;Flexible design adapts second template movement process, and give consideration to protective property and movement coordination, improve the protection reliability of cavity area.

The utility model discloses an electric wheel rear axle box maintenance cover, including maintenance cover subassembly, hinged mechanism, set up maintaining opening on rear axle box, maintenance cover subassembly includes apron, sets up the inner baffle ring and outer baffle ring of apron inboard, and the inner baffle ring and outer baffle ring are sequentially arranged from the center of apron to the outer edge, and the wallboard of maintaining opening is inserted between the inner baffle ring and outer baffle ring, and one end of hinged mechanism is fixedly connected with apron outside, and the other end is fixedly connected with the rear axle box outer wall at maintaining opening, and apron is opened and closed along the horizontal direction rotation through hinged mechanism. Through the collaborative design of double baffle ring insertion type sealing structure and horizontal rotation hinge, improve the dynamic sealing performance and the ability of resisting foreign matter invasion of rear axle box maintaining opening, improve the opening and closing operation efficiency and structural stability of large maintenance cover, effectively adapt to the extreme vibration working condition of mining area and reduce the maintenance complexity, can satisfy the requirement of high frequency maintenance convenience, precision component protection reliability and heavy equipment structure durability of mine electric wheel rear axle box.

The utility model provides a protection circuit for a lithium battery pack, which comprises a battery pack, a battery management chip IC (integrated circuit), an MOS (metal oxide semiconductor) tube, a three-end self-recovery fuse, a fusing control circuit and a protection detection unit, the positive electrode of the battery pack is connected with the battery management chip IC, and the battery management chip IC is in control connection with the grid electrode of the MOS tube. The protection detection unit is arranged corresponding to the MOS tube and is used for detecting safety information of the MOS tube; the fusing control circuit is connected with the three-end self-recovery fuse according to the detection information of the protection detection unit; the positive electrode of the battery pack is connected with the source electrode of the MOS tube through a three-end self-recovery fuse. According to the utility model, the protection detection unit is additionally arranged in the protection main loop of the battery pack and is used for detecting the safety information of the MOS tube and protecting the MOS tube according to the detection result, so that the protection reliability of the battery pack can be improved, the application scheme is simple, and the battery pack protection circuit has the advantages of simple structure, high reliability, safety and convenience.

This utility model relates to the field of blister packaging technology, and in particular to a food blister packaging with an anti-pressure buffer structure. The food blister packaging with an anti-pressure buffer structure includes a box body, a lower connecting edge fixedly connected to the top of the box body, an upper connecting edge hinged to one side of the lower connecting edge, a lid fixedly connected to the middle of the upper connecting edge, symmetrically fixed placement rings inside the box body, a hexagonal groove on the lower connecting edge, a hexagonal prism fixed at the bottom of the upper connecting edge that inserts into the hexagonal groove, a first support column and a second support column inside the box body, a first limiting post at the bottom of the lid that engages with the first support column, and second limiting posts at the four corners of the lid that engage with the second support column. Fastening grooves are provided on the upper and lower connecting edges away from the hinge. The food blister packaging with an anti-pressure buffer structure provided by this utility model has the advantages of strong anti-pressure performance, good anti-torsion effect, reliable protection of internal food, reasonable structural design, and strong practicality.

The present invention discloses an IPM protection device, a motor and an IPM protection method thereof, the device comprising: a current sampling circuit, a first overcurrent protection circuit, a second overcurrent protection circuit and a controller; wherein the current sampling circuit is used to collect the three-phase current of the motor driven by the IPM to be protected, and output a first output signal when the current sampling circuit is normal, or output a second output signal when the current sampling circuit is abnormal; the first overcurrent protection circuit is used to implement overcurrent protection for the IPM to be protected according to the first output signal under the control of the controller; the second overcurrent protection circuit is used to implement overcurrent protection for the IPM to be protected according to the second output signal under the control of the controller. The solution of the present invention can solve the problem of poor protection reliability caused by the internal power device of the IPM being burned after the operational amplifier chip in the current sampling circuit fails, thereby achieving the effect of improving protection reliability.

This application relates to the technical field of electricity metering boxes and discloses an efficient heat dissipation electricity metering box, which includes a box body with a mounting base plate inside the box body. A trigger plate is slidably connected to the mounting base plate, and the trigger plate is located between the electrical components and the mounting base plate. The trigger plate includes a heat-conducting part and an insulating part. The heat-conducting part is located at the end of the insulating part near the ground. The mounting base plate is provided with a limiting structure. This application enables the electricity metering box to efficiently conduct the heat of the electrical components to the mounting base plate for heat dissipation during normal operation using the heat-conducting part. When the system encounters abnormally high temperatures, it can switch to the insulating part to prevent the abnormal heat on the mounting base plate from being transferred back to the electrical components over a large area. This prevents problems such as electrolytic capacitor life decay, LCD screen malfunction, metering inaccuracy, or even permanent damage caused by the superposition of ambient temperatures, curbs the expansion of the accident scope, and further improves the operational safety and reliability of the electricity metering box.