719 results about "Circuit Failure" patented technology

The invention relates to the technical field of circuit monitoring, in particular to an intelligent sensing and identifying method for circuit faults of a semiconductor hybrid solid-state circuit breaker. Obtaining a fluctuation abnormal moment according to the amplitude characteristic and the continuous characteristic of the current fluctuation in the current time sequence curve; obtaining a suspected current anomaly moment according to the difference characteristic of the fluctuation anomaly degree of the fluctuation anomaly moment and the same historical moment; clustering is carried out according to the current characteristics and fluctuation characteristics of all suspected current abnormal moments in the current time sequence curve, and different clusters are obtained; obtaining the current anomaly degree of the clustering cluster according to the quantity characteristics of the suspected current anomaly moments in the clustering cluster and the distance characteristics in the clustering space; obtaining a current abnormity moment according to the current abnormity degree; a fault characteristic value is obtained according to the distribution characteristic of the current abnormity moment and the change characteristic of the current abnormity degree in the current time sequence curve, and circuit fault identification is carried out, so that the working stability of the circuit breaker is improved.

The invention discloses a crosslinked polyethylene sheath insulation variable frequency cable, and relates to the technical field of cables, and the cable comprises a cable assembly, a temperature sensing mechanism penetrates through the center part of the inner side of the cable assembly, and a plurality of first heat dissipation assemblies are distributed on the side wall of the cable assembly in the circumferential direction at equal intervals; a second heat dissipation assembly is arranged between every two adjacent first heat dissipation assemblies. The temperature sensor is distributed in the middle of the inner side of the filling layer, and the wire conductors are annularly distributed on the inner side of the filling layer, so that the temperature sensor is arranged in the center between the wire conductors, and the temperature sensor can monitor the temperature generated by the wire conductors; according to the utility model, data can be transmitted to the controller through the sensing circuit, and the wire conductor stops working through analysis and control of the controller, so that the temperature is reduced, and the situation that the circuit cannot be normally used when the circuit fails or overload occurs due to overhigh load is avoided.

The invention provides a control method and system for active short circuit of an electric control system of an electric vehicle, and the method comprises the steps: when the electric control system breaks down, if the fault is a short-circuit fault, judging whether the fault belongs to an IGBT short-circuit fault only occurring in an upper / lower bridge, and if yes, entering an ASC mode short-circuit state of the bridge where the fault is located; if the fault is the open-circuit fault, judging whether the upper bridge and the lower bridge have the open-circuit fault, and if so, performing the next step; otherwise, entering an ASC mode short-circuit state of the other bridge of the bridge where the open-circuit fault is located; the number of upper bridge open circuits and the number of lower bridge open circuits in the faults are compared, and the ASC mode two-phase short circuit state of the bridge where the small number of open circuit faults are located is entered; and if the number of the upper bridge open-circuit faults is equal to the number of the lower bridge open-circuit faults, selecting one to enter an upper / lower bridge ASC mode two-phase short-circuit state. According to the scheme, the risk of direct conduction of the positive electrode and the negative electrode of the battery possibly caused by a short-circuit fault of the other bridge when a default upper / lower bridge ASC active short circuit is directly entered is avoided.

The invention discloses a heat dissipation system with an anti-permeation layer and electronic equipment. The heat dissipation system comprises a substrate, a shell and at least one anti-permeation layer, and a heating element is arranged on the substrate. The shell is connected to the substrate, a containing space used for being filled with a cooling working medium is defined between the shell and the substrate, and the heating element is arranged in the containing space. At least part of the anti-permeation layer covers the surface, exposed out of the containing space, of the substrate and further covers the connecting position of the shell and the substrate and the connecting position of the heating element and the substrate. According to the application, through the arrangement of the anti-permeation layer, circuit failure and influence on signal transmission caused by the fact that the cooling working medium permeates into the substrate can be avoided, and the problem of sealing failure caused by accelerated aging of the adhesive layer between the substrate and the shell due to long-term soaking of the cooling working medium can also be avoided.

Aspects of this disclosure relate to a power amplifier system with symbol-based envelope tracking and fault protection. The system can include a power amplifier and a voltage modulator. The voltage modulator can include switches configured to provide the bias voltage and to provide electric circuit breaker protection. The voltage modulator can include a fault detection circuit that can cause a switch of the switches to provide electric circuit breaker protection in response to detecting a circuit fault. Related methods and voltage modulators are disclosed.

The utility model provides a fault simulation training device for an overheat protection circuit of a civil aviation air conditioning component, comprising a stand body, a central console, and an air conditioning component overheat protection fault simulation circuit module comprising a dark box and a circuit panel; the dark box is connected to the central console in communication; the dark box includes an air conditioning component overheat protection fault simulation circuit, which includes a DC power supply, a thermal relay, a thermistor module, a reset switch module, and an overheat indication module; the DC power supply is connected to one end of the thermistor module via a coil of the thermal relay, the other end of the thermistor module is grounded, the reset switch module and the overheat indication module are respectively connected to the first make contact and the second make contact of the thermal relay; the circuit panel is provided with a connection schematic diagram corresponding to the fault simulation circuit and a plurality of fault measurement holes. The utility model can simulate various circuit fault points in the air conditioning component overheat protection fault simulation circuit module, and realize direct measurement of circuit faults.

To prevent the occurrence of a short-circuit failure through a magnetic body layer. A coil component includes interlayer insulating films and conductor layers which are alternately stacked on a magnetic body layer. The conductor layers respectively have coil patterns, terminal patterns which are provided at positions overlapping a terminal electrode, and terminal patterns which are provided at positions overlapping a terminal electrode. The terminal patterns are connected to the terminal electrode, and the terminal patterns are connected to the terminal electrode. The terminal pattern is insulated from the terminal electrode. This can prevent a short circuit failure between a coil pattern or terminal pattern and the terminal pattern through the magnetic body layer.

The present invention relates to a method for diagnosing secondary faults of a rotating rectifier of a multi-stage starting generator. If a single diode open circuit fault occurs in the rotating rectifier when the multi-stage starting generator is in the power generation stage, the system can be derated and run "with the fault". However, a single diode open circuit will cause the three bridge arms of the rotating rectifier to no longer be balanced, thereby increasing the risk of secondary faults. The method proposed in the present invention performs secondary fault diagnosis of the rotating rectifier based on the maximum point distribution characteristics of the voltage waveform at the idle winding end of the stator of the exciter. The proposed method makes full use of the idle excitation winding of the exciter when the system is in the power generation stage. The algorithm is simple and can diagnose the secondary faults of the rotating rectifier online in real time.

The invention relates to the field of motor control, in particular to a fault-tolerant control method, electronic equipment for implementing the method and a computer readable storage medium. The method comprises the following steps of determining a voltage vector controllable range which can be used for controlling the stator voltage of the motor according to the type of a short-circuit bridge arm in response to a detected single-bridge-arm short-circuit fault of an inverter used for driving the alternating current motor; converting the voltage vector controllable range into a corresponding rotor angle controllable range; when the motor rotor angle is out of the rotor angle controllable range, controlling the AC motor to enter an active short-circuit state; and when the rotor angle of the motor is in the rotor angle controllable range, controlling the alternating current motor to output target torque by using current closed-loop control and discontinuous pulse width modulation, so that the average torque output by the alternating current motor in one electric period reaches an expected value.

The invention relates to the technical field of analog current fault diagnosis, in particular to an analog current fault diagnosis method based on redundancy feature suppression, which comprises the following steps: acquiring voltage and current data of a circuit output position according to a circuit simulation model, and constructing a circuit fault state data set according to the voltage and current data; performing time-frequency analysis on the circuit fault state data set through discrete wavelet transform; performing redundant feature suppression processing on the hierarchical frequency domain component set to obtain a circuit fault state data feature set; a DCNN-BiLSTM model is constructed, the DCNN-BiLSTM model is trained according to the circuit fault state data feature set, and the DCNN-BiLSTM model meeting a preset fault diagnosis correct rate is output as an analog power fault diagnosis model; and obtaining target to-be-detected voltage and current data, and performing analog current fault diagnosis on the target to-be-detected voltage and current data according to the analog current fault diagnosis model to obtain a corresponding fault type classification result. According to the invention, redundant features can be effectively suppressed, and the accuracy of analog power supply fault diagnosis is remarkably improved.

A power stage includes a control device and a power transistor, the control device comprising a primary circuit comprising: a control module able to generate a control current, a primary circuit malfunction detector able to detect a malfunction, a pulse transformer comprising a primary winding connected to the primary circuit, comprising a secondary winding connected to the secondary circuit, magnetically coupled to the primary winding and able to generate, from the control current, an induced pulse current making it possible to drive the power transistor, a secondary circuit comprising: a power and fault detection controller able to detect a malfunction of the secondary circuit or of the power transistor, the power and fault detection controller being able to communicate the malfunction of the secondary circuit or of the power transistor to the primary circuit malfunction detector.

The invention relates to the technical field of circuit fault detection, and discloses a circuit fault detection device and a detection method thereof.The circuit fault detection device comprises a detection frame, a first draught fan is arranged on the outer wall of the detection frame, a dustproof cover capable of ascending and descending is arranged in the detection frame, and a detection probe used for detecting a circuit board is arranged at the top in the dustproof cover; a pressing block used for pushing the clamping assemblies to move relatively is arranged in the dustproof cover. A brush plate capable of rotating is arranged at the position, located on one side of the supporting plate, in the detection frame, and a dust removal assembly used for cleaning the brush plate is arranged in the detection frame. According to the invention, interference possibly generated by an external environment during detection can be avoided, and the accuracy of fault detection is ensured; and dust on the brush head is stripped by using a scraper, and the stripped dust is adsorbed by the first electrostatic dust collection plate, so that the brush head can be cleaned, and the influence of raised dust on the detection of the circuit board can be avoided.

The invention discloses a T-type three-level circuit fault wave sealing recovery processing method, which comprises the following steps of: increasing driving signal response time and / or wave sealing recovery signal response time of a vertical tube relative to a transverse tube, so that the vertical tube is conducted with the transverse tube after wave sealing recovery. Or only the vertical pipe is subjected to hardware wave sealing treatment, and the transverse pipe is always in a conducting state; when wave sealing recovery is carried out, the vertical pipe is conducted with the transverse pipe based on the hardware wave sealing structure. Compared with a traditional mode, the device has the advantages that it can be guaranteed that the normally-closed transverse pipe is conducted earlier than the high-frequency vertical pipe in the wave sealing recovery process of the system, the overvoltage risk of the high-frequency transverse pipe is avoided, and the stability of the system is improved.

The present invention relates to the technical field of disconnectors, and discloses an electric operating device for a high-voltage disconnector, comprising a switch assembly, a support seat, a rotating rod rotatably connected in the support seat, a drive sleeve fixed at the end of the rotating rod, and a drive plate fixed on the surface of the drive sleeve; an operating assembly, arranged on one side of the drive plate, comprising a separation and combination member, a support shell arranged on one side of the drive plate, and a screw rod rotatably connected in the support shell. The beneficial effects of the present invention are as follows: 1. The first spring is compressed or stretched by the screw rod, and the drive plate is driven to move quickly by the spring reset elastic force, so as to realize the rapid separation and closing of the knife switch, reduce the generation of arc, reduce the wear of the contacts, and extend the service life of the equipment; 2. An emergency disconnect mechanism composed of a reset member and an electromagnet is provided. When a circuit fails, the electromagnet drives the limit release, and the tension of the seventh spring prompts the reset block to push the moving seat, quickly opening the knife switch, avoiding the expansion of the fault, and ensuring the safety of the power system.

The invention discloses a short-circuit fault suppression method based on transient recovery voltage, and the method comprises the steps: monitoring the transient recovery voltage during a short-circuit fault in real time, and predicting the amplitude of the transient recovery voltage possibly caused by the short-circuit fault based on a monitoring result; on the basis of the prediction result, the circuit breaker is controlled to carry out split-phase opening according to a preset sequence, and the rising rate of the high-frequency transient voltage is further adjusted by adaptively adjusting the shunt path of the short-circuit current; the arc reignition phenomenon in the opening period of the circuit breaker is monitored, prevented and controlled in real time, and meanwhile a signal opposite to the transient recovery voltage harmonic component is generated to counteract higher harmonics. The method is not only suitable for various types of short circuit fault scenes, but also can prolong the service life of power grid equipment, and provides technical guarantee for safe and stable operation of a power system.

The invention relates to the technical field of wire harness terminal tension testing, and discloses an automobile wire harness terminal tension testing device which comprises testing equipment, a controller, a display screen and a workbench are arranged on the testing equipment, and a wire harness fixing mechanism, a terminal fixing mechanism and an automobile vibration simulation mechanism are arranged on the workbench; the wire harness fixing mechanism comprises a plurality of bearing frames arranged on the workbench in a sliding mode, electric push rods are installed on the upper surfaces of the bearing frames, an upper pressing plate is fixed to the output ends of the electric push rods, and a driving traction mechanism used for driving the bearing frames to move synchronously is arranged in the workbench. According to the invention, the wire harness fixing mechanism, the terminal fixing mechanism and the automobile vibration simulation mechanism are arranged, and the wire harness fixing mechanism and the terminal fixing mechanism can be used for fixing a wire harness part and a terminal part respectively, so that whether the connection strength of a terminal and a wire reaches the standard or not can be detected; circuit faults caused by connection loosening or falling in the using process are avoided.

The invention relates to the technical field of machine power detection equipment, in particular to a portable power measurement fault first-aid repair box device, and provides a portable power measurement fault first-aid repair box device for solving the problem that an electrician is inconvenient to carry, detect and replace a new device when detecting a high-position circuit fault. A box body is arranged at the top of the multi-stage lifting device, the supporting table is installed on an adjusting threaded rod, and a structure for adjusting the angle of the supporting table can be formed when the adjusting threaded rod moves up and down. A locking mechanism matched with the adjusting threaded rod is further arranged on the round base, and when the locking mechanism is opened, the adjusting threaded rod can be limited to move up and down; the detection equipment can be lifted to a designated position according to user requirements, is free from the work carried by an electrician, is convenient to operate and high in safety, has a parallel adjustment function, can be leveled on an uneven ground, prevents the detection equipment from inclining and falling laterally, is free from the work carried by the electrician, and is convenient to operate and high in safety.

According to the AC linear anti-surge high-voltage-resistant module, the stress of common-mode surge is improved by increasing the thickness of an insulating dielectric layer, and when the thickness of the insulating dielectric layer is 360 microns or above, the common-mode-surge-resistant stress can reach 4 KV or above. Therefore, when the module faces high common-mode surge voltage, the PCB is not prone to breakdown, and circuit faults caused by breakdown of the surge voltage are effectively avoided. The differential mode surge voltage is reduced step by step by adopting a four-stage protection circuit formed by the piezoresistors VR1-VR4 and the winding resistors RT1-RT4, so that the voltage finally reaching a rear-end circuit is in a safe range, the rear-end circuit is protected from being damaged by the high differential mode surge voltage, the differential mode surge stress resistance of the module is improved, and the differential mode surge stress resistance of the module is up to more than 6KV. According to the invention, the surge resistance and high-voltage stress resistance of the AC linear module are effectively improved.

Temperature-aware built-in self-test (BIST) control system for selectively controlling activation of BIST circuits in a processor-based system to maintain temperature limit and related methods. The temperature-aware BIST control system is configured to selectively control the number of BIST circuits in the processor-based system activated during the same time based on a temperature limit indicator related to a sensed temperature(s) in the processor-based system and whether such is within a defined temperature threshold(s) and / or temperature change rate threshold(s), which may be programmable. In this manner, the safety manager circuit can dynamically and selectively control the number of BIST circuits activated based on temperature according to the BIST control policy(ies) to reduce or avoid circuit failures due to excess temperature, while at the same time maximizing the staggering (i.e., overlapping) of BIST circuit activations to maximize testing speed.

The invention relates to the technical field of electric car braking, and discloses an electric car braking system based on multi-redundancy guarantee and self-adaptive control and a control method, and the electric car braking system comprises a redundant circuit module, a distributed driving module, an efficient transmission module and a self-adaptive control center. The reliability is remarkably improved, seamless switching of a main circuit and a standby circuit within 50 ms is achieved through a circuit dual-redundancy architecture, the distributed multi-motor driven torque reconstruction algorithm is matched, the braking efficiency retention rate under a single fault is improved, the circuit fault survival rate reaches 100%, the braking efficiency and safety are optimized, the mechanical loss is reduced to 8% or below through an efficient transmission module, and the reliability is improved. The braking distance of 100 km / h is shortened to 29 m, the energy utilization efficiency is improved, the energy consumption is further reduced through the low-friction transmission design, the dynamic adaptability and the collaboration are enhanced, a self-adaptive control center solves the multi-system instruction conflict through multi-sensor fusion and fuzzy PID adjustment with the sampling frequency of 1 kHz, the braking stability is improved by 40% or above, and the braking stability is improved by 20% or above. And the response time of the key control instruction under the emergency working condition is shortened to 75mS.

The invention relates to a fuse connector assembly, which comprises a fusion tube, a wiring port, a fuse carrier, a limiting baffle plate, a limiting assembly, a limiting piece, a pushing assembly and a handle piece, and can solve the technical problems that the installation position of a fuse is not considered in the prior art, and other circuit elements are usually installed on the periphery of the installation position of the fuse in a matched manner; in order to reduce the situation that the installation spaces are in a close-up state, when the fusible core is burnt out and needs to be replaced, due to the fact that the operation space is narrow, and most of the fusible core is located in the fuse carrier, the fusible core is difficult to take out and can be dug out only by being continuously pulled outwards by personnel, and efficiency is low. And as the periphery of the fusible core is in a circuit fault condition at the moment, personnel safety problems and the like can be caused by long-time staying.

The invention provides a drip irrigation tape double-wheel automatic winding machine, and relates to the field of drip irrigation tape production.The drip irrigation tape double-wheel automatic winding machine comprises a machine box, a machine frame is arranged on one side of the machine box, a PLC is arranged on the side, away from the machine box, of the machine frame, and the drip irrigation tape double-wheel automatic winding machine further comprises a reel changing mechanism which comprises a large truss arm installed on the side, facing the PLC, of the machine box; the two ends of the large truss arm are each provided with a winding rotating shaft in a penetrating mode, winding discs are installed on the sides, facing the PLC, of the winding rotating shafts, and the other ends of the winding rotating shafts are connected with driven gears. A fixing mechanism; by changing the arrangement mode of the winding motor, the problems that when the winding motor is installed, an electric slip ring needs to be arranged to prevent a wire harness from rotating, so that a circuit system is complex, and the fault position is difficult to rapidly discharge after a circuit breaks down are solved, meanwhile, two winding discs can be driven through a single servo motor, and the winding efficiency is improved. And the utilization rate of the servo motor is improved.

The invention relates to the technical field of power systems, and discloses a high-voltage circuit breaker fault diagnosis method and system and computer equipment, and the method comprises the steps: analyzing the change waveform of contact displacement and coil current during the operation of a high-voltage circuit breaker; constructing a high-voltage circuit breaker fault data set covering four fault situations of coil voltage, coil resistance, a damper and a spring structure; building a preliminary SVM fault classification diagnosis model; fusing a data relationship between faults and a parallel acceleration module into the preliminary SVM fault classification diagnosis model, and training the preliminary SVM fault classification diagnosis model to obtain a trained SVM fault classification diagnosis model; and diagnosing the high-voltage circuit breaker according to the trained SVM fault classification diagnosis model to obtain a fault diagnosis result. By analyzing the change waveform of the contact displacement and the coil current during the operation of the high-voltage circuit breaker, the fault data set covering various fault conditions is constructed, and the SVM fault classification diagnosis model is adopted for diagnosis, so that various faults of the high-voltage circuit breaker can be accurately diagnosed.

The utility model discloses a waterproof bathroom controller. The waterproof bathroom controller comprises a fixed seat; the connecting assembly is connected to the fixing base and comprises a first connecting base, and a first mounting groove is formed in the side, facing the fixing base, of the first connecting base; the first circuit board is mounted in the first mounting groove and is sealed with the first mounting groove through glue pouring; and the adjusting device is mounted on the first circuit board so as to linearly adjust or switch and adjust the output parameters of the electrical equipment. The glue filling sealing structure provides a waterproof barrier for the first circuit board, circuit faults caused by water vapor erosion are effectively prevented, and the service life of equipment is prolonged. Moreover, the setting of the adjusting device allows the user to adjust the output parameters of the electrical equipment in a linear adjustment or switching manner, such as opening and closing control, water flow adjustment and water temperature adjustment, so that the convenience of operation is ensured, the reliable operation of the controller under a humid condition is ensured, safe and stable intelligent shower experience is provided for the user, and the user experience is improved. The waterproof paint is especially suitable for a bathroom environment with high requirements on waterproof performance.

The utility model discloses an active clamping forward switching power supply with dead zone control. The active clamping forward switching power supply comprises a minimum pulse circuit, a dead zone setting circuit, a signal interlocking circuit and an active clamping forward switching circuit, the minimum pulse circuit, the dead zone setting circuit and the signal interlocking circuit are connected in sequence; the active clamping forward switching circuit comprises a transformer T1, the two ends of a primary side winding of the transformer T1 are connected with a clamping absorption circuit in parallel, a primary side negative electrode of the transformer is connected with a main power circuit, and the clamping absorption circuit and the main power circuit are connected with a signal interlocking circuit. The circuit can flexibly set dead time to avoid circuit failure caused by direct connection of a clamping tube and a main power switch tube, input signal burrs can be eliminated, mistaken switching-on caused by the signal burrs can be avoided, one path of PWM can be converted into two paths of PWM output, and the number of external equipment is reduced.

The present invention relates to the technical field of electrical equipment, and discloses an intelligent switch, including a base and a panel; the base has a groove and is used to be accommodated in a concave cavity of a wall; a hollow first sleeve is provided on the bottom of the groove, and a glue outlet connected to the inside of the first sleeve is provided on the outer side of the base; an annular protrusion is provided on the outer side of the base for abutting against the surface of the wall, and the annular protrusion, the outer side of the base and the inner wall of the concave cavity of the wall are enclosed to form a partition for filling with waterproof glue; the panel cover is provided on the groove; a second sleeve extending into the groove and adapted to the first sleeve is provided on the rear side of the panel, the inside of the first sleeve is connected to the inside of the second sleeve, and the second sleeve has a glue injection port opened on the front side of the panel. The present invention resists the penetration of moisture by filling with waterproof glue, has a better moisture-proof effect, can better protect the electronic components in the intelligent switch, and effectively avoids circuit failures caused by wall moisture.

The invention provides a shock wave power supply and a shock wave release detection method. The shock wave power supply comprises a booster circuit, at least one detection circuit and at least one discharge circuit, the booster circuit and all the discharge circuits are connected to the same single circuit, the at least one detection circuit is connected with the at least one discharge circuit in a one-to-one correspondence manner, one end of the detection circuit is electrically connected with one end of the corresponding discharge circuit, and the other end of the detection circuit is electrically connected with the other end of the corresponding discharge circuit. By detecting the voltage drop of the discharge circuit, the short circuit of the discharge circuit and the open circuit of the discharge circuit can be detected, so that two circuit fault states are covered, and the purpose of completely detecting the circuit fault states is achieved.

The present disclosure relates to the field of compressors, and in particular to an air conditioner and a compressor. The compressor comprises a compressor main body, a sealing cover, a frequency converter module, a flow guide assembly and a heat exchanger assembly; the sealing cover is arranged on a side surface of the compressor main body, so as to form a mounting chamber between the inner periphery of the sealing cover and the side surface of the compressor, the frequency converter module, the flow guide assembly and the heat exchanger assembly all being arranged in the mounting chamber; the flow guide assembly is used for guiding and driving air within the mounting chamber to flow along a set path, so as to form recirculating air that flows through the heat exchanger assembly and the frequency converter module; a refrigerant can be introduced into the heat exchanger assembly to exchange heat with the recirculating air; the cooled recirculating air flows to the frequency converter module to cool the frequency converter module. The compressor can reduce the temperature difference between the air in the frequency converter module and the mounting chamber and a compressor casing, so as to avoid the occurrence of condensation at live components of the frequency converter module, thus reducing the probability of circuit failures and the risk of fires caused by short circuits.

The utility model relates to a box body structure of a common box type circuit breaker, which comprises a lower box body, an upper box body, a wiring terminal, a buckle cover, an explosion-proof fragmentation and an explosion-proof protection plate, the lower box body is connected with the upper box body in a sealing way, a sealing cavity is formed between the lower box body and the upper box body, the upper box body is connected with the wiring terminal in a sealing way through the buckle cover, the wiring terminal extends into the sealing cavity, and the explosion-proof fragmentation is connected with the explosion-proof protection plate through the buckle cover. A pressure relief opening communicated with the sealing cavity is formed in one side of the lower box body, the position, located at the pressure relief opening, of the lower box body is connected with an anti-explosion fragment in a sealed mode, the anti-explosion protection plate is fixedly connected to the outer side of the anti-explosion fragment, and pressure relief mesh holes are formed in the side face of the anti-explosion protection plate. The main purpose of the utility model is to control the air pressure of the sealing cavity through the explosion-proof fragmentation, and the discharged air is blocked and dispersed by the explosion-proof protection plate, thereby preventing the sealing structure among the accessories such as the lower box body, the upper box body, the wiring terminal and the like from being damaged by the overhigh air pressure, and the explosion-proof fragmentation can be replaced for reuse after the circuit fault is eliminated. Therefore, maintenance cost is reduced, and economic benefits are improved.

A remote control leakage protection plug executing fixed period automatic detection comprises a remote control leakage protection plug and a remote control leakage protection plug fixed period automatic detection unit, and the remote control leakage protection plug fixed period automatic detection unit comprises a tripping mechanism, a microprocessor MCU, an alternating current signal sampling module, an ACDC power supply and a remote control signal detection module. The alternating current signal sampling module sends collected signals to the MCU, whether electric leakage or other circuit faults exist or not is judged after the signals are analyzed and processed by the MCU, then on-off control signals are sent to the tripping mechanism, the tripping mechanism acts, and whether a power supply loop is switched on or switched off is determined. The MCU can also send out automatic detection signals aiming at the control circuit and the tripping mechanism according to regular automatic detection information set by the embedded program, and the tripping mechanism executes an automatic on-off detection function to ensure that the leakage protection plug circuit system and the action mechanism are kept in a normal standby state. The MCU further receives a remote control signal sent by the remote control signal detection module so as to control the power supply circuit.