1719 results about "Short circuit protection" patented technology

The invention discloses a 5G base station power supply state intelligent monitoring system and method, and belongs to the technical field of intelligent monitoring. According to the system, operation parameters of a 5G base station power supply are acquired in real time through the data acquisition module, and after the operation parameters are processed by the signal conditioning and conversion module, the master control processing unit analyzes digital signals in real time, detects abnormal states and generates alarm information. The communication module is responsible for data transmission and instruction receiving, and the power management and safety protection module provides overvoltage, undervoltage, overcurrent and short circuit protection and triggers emergency measures. The artificial intelligence analysis module performs fault prediction and performance optimization based on historical data and real-time data, and the remote monitoring terminal realizes data visual monitoring and management. According to the invention, the real-time performance and accuracy of monitoring are improved, unified management of multiple base stations is realized, the operation and maintenance cost is reduced, and stable operation of a 5G communication network is guaranteed.

Apparatus, systems, and methods described herein relate to safety devices for electrochemical cells comprising an electrode tab electrically coupled to an electrode, the electrode including an electrode material disposed on a current collector. In some embodiments, a fuse can be operably coupled to or formed in the electrode tab. In some embodiments, the fuse can be formed by removing a portion of the electrode tab. In some embodiments, the fuse can include a thin strip of electrically resistive material configured to electrically couple multiple electrodes. In some embodiments, the current collector can include a metal-coated deformable mesh material such that the current collector is self-fusing. In some embodiments, the fuse can be configured to deform, break, melt, or otherwise discontinue electrical communication between the electrode and other components of the electrochemical cell in response to a high current condition, a high voltage condition, or a high temperature condition.

The present invention relates to the technical field of power system relay protection, in particular to a power distribution network single-phase short-circuit protection method based on characteristic current adaptive injection. The method comprises: collecting a voltage of a power distribution network bus and characteristic frequency currents of feeder outlets; when a zero-sequence voltage in the power distribution network bus is detected to exceed the limit, according to a relationship between the voltage of the power distribution network bus and a threshold voltage, calculating a photovoltaic injection characteristic frequency current control reference value, and photovoltaic active power and reactive current control reference values; latching a control outer loop of a photovoltaic inverter, switching the photovoltaic active power and reactive current control reference values, setting the injection characteristic frequency current control reference value, and starting photovoltaic characteristic current adaptive injection control; and comparing the amplitudes and phases of the characteristic frequency currents of respective feeders, and if there is a certain feeder satisfying the maximum characteristic frequency current amplitude, and this feeder is not the longest feeder or the characteristic frequency current phase thereof lags behind that of other feeders, determining that the feeder is a faulty feeder. The design of the present invention has good economical efficiency, practicability and implementability.

The invention discloses a power supply circuit, a power supply method, a server, a product and a medium, and relates to the technical field of server power supply, the total power demand of the server is dispersed through the parallel design of multiple power panels, the bus current of a single board connected to a first voltage is reduced to the safe bearing range of an MOS tube, the impact risk is reduced, and the service life of the server is prolonged. The electronic fuse is matched with the single-board power to set an overcurrent protection threshold value, and the short-circuit protection response time is shortened; each board is independently provided with a power supply brick to realize second voltage localization conversion and single board output current reduction, a multi-board output end combined power supply design is combined, a heat source is dispersed to eliminate heat accumulation, the through-current capability is multiplied through a parallel path, and the heat dissipation and electrical design feasibility of the circuit board is improved. The technical problems of MOS tube over-limit, overcurrent protection delay, circuit board heat accumulation and difficult through-flow caused by large current brought by a power supply in a high-power server are solved, and the technical effects of enhancing power supply reliability and optimizing energy efficiency are achieved.

The invention relates to the technical field of battery testing, in particular to an automatic BMS function testing system and method. The method comprises the following steps: acquiring BMS working parameters; performing short-circuit working condition configuration processing according to the BMS working parameters to generate short-circuit working condition configuration data; performing short-circuit signal simulation based on the short-circuit working condition configuration data to generate short-circuit simulation control signal time sequence data; based on the short-circuit analog control signal time sequence data, a battery pack current short-circuit driving test is carried out through a BMS monitoring system, and BMS monitoring response data is generated; and performing short-circuit current monitoring protection evaluation according to the BMS monitoring response data, and generating BMS function test level data. According to the invention, the automatic test of the BMS short-circuit protection function is realized by intelligently configuring the short-circuit working condition, and the efficiency, accuracy and repeatability of the test are remarkably improved.

The invention discloses a multistage protection technology for an intelligent integrated power supply system, and the technology comprises the steps: monitoring the operation state of the power supply system in real time through various types of configured sensors, and transmitting the monitoring data to a data collection module in a wireless manner for data storage; constructing an internal state analysis model, inputting monitoring data, outputting an internal state analysis value, performing threshold comparison, judging whether the operation state of the power supply system is abnormal or not, and controlling the protection module to be started when the operation state is abnormal; according to the invention, a self-adaptive protection strategy is adopted, the abnormal state of the power supply system can be monitored according to the operation state and environmental factors of the power supply system, various protection measures including short-circuit protection, overload protection, under-voltage protection, overvoltage protection, leakage protection, lightning protection and the like are adopted, comprehensive protection of the power supply system is realized, and the power supply system is protected. The problems that an existing power system protection technology is insufficient in data analysis degree, and protection measure starting conditions are not accurate enough are solved.

The invention belongs to the technical field of on-satellite intelligent information processing power supply and distribution, and discloses a power supply and distribution system of an on-satellite real-time information processing system. The system is composed of a short circuit protection circuit (10), a surge suppression circuit (20), a satellite real-time processing system switching circuit (30) based on a magnetic latching relay, an EMI filter (40), a DC-DC power supply module (50), a relay-based power supply and distribution switching circuit (60), a DC-DC power supply module (70) and a DC-DC power supply module (80). According to the invention, the power supply problem of any dynamic redundancy unit in the satellite real-time information processing system is solved, and the sneak path problem caused by misoperation in the use process is avoided.

The invention relates to an energy storage container and a fuse adaptation method. The energy storage container comprises a confluence unit; the plurality of high-voltage boxes are connected to the confluence unit; a plurality of battery clusters, wherein one battery cluster is electrically connected with one high-voltage box; the processing unit is electrically connected to the plurality of high-voltage boxes; the high-voltage box comprises a first short-circuit protection unit and a first current detection unit electrically connected to the first short-circuit protection unit, the first short-circuit protection unit is electrically connected to the processing unit, and the first current detection unit is used for detecting short-circuit withstand current of a branch where the high-voltage box is located when the container is short-circuited. And the processing unit is used for selecting a fuse adaptive to the energy storage container in the first short-circuit protection unit according to the short-circuit withstand current. According to the invention, the reliability and rationality of short-circuit protection can be improved, the safety risk caused by improper short-circuit protection is reduced, and the cost is reduced while the electrical safety is improved.

The utility model discloses a busbar, battery module and battery pack, the busbar includes at least two conducting strip, by setting the first weak part and the second weak part above the thinning area, when the pressure is released, the thinning area will be burst open by the high pressure gas in the single battery, and the impact force will break the first weak part and the second weak part. Therefore, the pressure release valve can efficiently and smoothly release pressure; and when the first weak part and the second weak part are disconnected, the circuit connection between the two adjacent single batteries is also disconnected, so that short-circuit protection is realized, and finally, dual protection of pressure relief protection and battery cell short-circuit protection is synchronously realized. In addition, the first weak part and the second weak part are fused due to overcurrent when being subjected to strong current, and dual protection can also be achieved. The battery module with the busbar can realize dual protection of internal pressure relief protection and battery cell short-circuit protection of the battery module. The battery pack with the battery module has higher safety performance.

The invention discloses a power device driver and a parameter correction method thereof, which are applied to the technical field of power device driving, and are characterized in that a data acquisition module acquires grid voltage and peak current of an IGBT (Insulated Gate Bipolar Translator) in the working process of the IGBT to obtain sampling data; the digital isolation chip realizes electrical isolation among the data acquisition module, the MCU and the grid voltage regulation module; the MCU calibrates the real-time junction temperature data based on the sampling data by using a preset junction temperature calibration formula and outputs calibrated junction temperature data; the gate driving chip outputs a gate voltage capable of driving the IGBT according to the control signal; the second-order short-circuit protection module sends an abnormal signal to the MCU when the IGBT is short-circuited, so that the MCU sends a grid voltage regulation trigger signal to the grid voltage regulation module; the grid voltage adjusting module responds to the grid voltage adjusting trigger signal and controls itself to reduce the grid voltage. Based on the power device driver and the parameter correction method thereof provided by the invention, the junction temperature monitoring precision and reliability are improved.

The invention provides a power converter and an energy storage system, and belongs to the technical field of power electronics. The power converter provided by the invention comprises an NPC three-level balance circuit, a current sampling circuit and a control circuit. Wherein the current sampling circuit can sample current which flows through the midpoint of a bus and flows through a clamping diode included in a first bridge arm in the NPC three-level balance circuit. The control circuit can determine that the clamping diode or the internal switching tube in the first bridge arm has a short-circuit fault if the current is detected to be large under the condition that the external switching tube in the first bridge arm is switched on or the internal switching tube in the first bridge arm is switched off. At the moment, the control circuit stops outputting the PWM signal to the NPC three-level balance circuit, so that each switching tube in the NPC three-level balance circuit is turned off, and the diffusion of the short-circuit fault can be avoided. Therefore, short-circuit protection of the NPC three-level balance circuit is realized, and fire caused by electric leakage of the NPC three-level balance circuit is avoided.

The invention discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method, and relates to the technical field of display. The disclosed short-circuit protection circuit comprises a short-circuit detection module and a short-circuit processing module; the short circuit detection module converts the current loop current on the OLED device into a target detection voltage and outputs the target detection voltage to the short circuit processing module; the short circuit processing module compares the target detection voltage with a preset reference voltage; the short circuit processing module judges that the OLED device is in a short circuit state when the target detection voltage is greater than the preset reference voltage; and when the OLED device is in a short-circuit state, the short-circuit processing module disconnects the loop where the OLED device is located in the OLED driving module. According to the invention, accurate detection of the short circuit of the OLED device is realized through a voltage comparison mode, so that the OLED device can be timely disconnected when the OLED device is short-circuited, and the potential safety hazard is effectively reduced.

The invention relates to the field of display, and discloses a short-circuit protection circuit, an array substrate, a display device and a short-circuit protection method.The short-circuit protection circuit is used for an OLED device and comprises the steps that an information sensing module obtains the actual working current of the OLED device and real-time parameters related to the working state of the OLED device; the dynamic expectation calculation module calculates the dynamic expectation working current n of the OLED device according to the real-time parameters and a preset OLED electrical characteristic model; the decision module synthesizes the actual current, the expected current and the current change rate / fluctuation amplitude to generate a risk judgment signal; and the response control module executes protection operation according to the judgment signal. According to the OLED short-circuit protection method, the accuracy, the sensitivity and the intelligent management level of OLED short-circuit protection are remarkably improved through the technology of dynamically calculating the expected current and carrying out decision making and parameter self-adaptive adjustment by fusing the actual current time sequence characteristics.

Disclosed is a device for detecting and protecting a short circuit of a switch. A short-circuit protection device according to an embodiment of the present invention includes a voltage measurement unit configured to measure an output voltage of a switch and output the output voltage as a measured voltage, a comparison unit configured to compare the measured voltage with a specified reference voltage, and a connection unit that is connected between the voltage measurement unit and the comparison unit and in case that the switch is turned off, the connection unit is configured to connect an output terminal of the voltage measurement unit to a first ground.

A self-triggering, bidirectional control electronics component for an electronic switch (50), for the detection and rapid shutdown of currents at a selected threshold value for both current flow directions, includes a threshold switch having a plurality of selectable shutdown threshold values for both current flow directions, the threshold switch coupled to a bidirectional current sensor system (65), arranged in the electronic switch, based on sensing of sensors on an input side of the threshold switch; and a high-speed de-energizing circuit (53) on an output side of the threshold switch including a high non-load circuit voltage for rapid removal of current from a magnetic drive coil (45), the high-speed de-energizing circuit being configured to rapidly remove the current from the magnetic drive coil when the bidirectional current sensor system senses a current greater than or equal to the selected threshold value among the plurality of selectable shutdown threshold values.

A short circuit protection system for a hybrid vehicle having an internal combustion engine and high voltage components including an electric drive motor is provided. The short circuit protection system includes a high voltage battery pack, a high speed reactive component and a controller. The high voltage battery pack powers the electric drive motor. The high speed reactive component is configured to move between a normally open position and a closed position, wherein in the closed position, power from the high voltage battery pack is diverted away from the high voltage components and to the high speed reactive component. The controller receives operating conditions of the high voltage components and communicates a signal to the high speed reactive component to move to the closed position based on operating conditions consistent with an electrical short to drain power from the high voltage battery pack.

A lighting device having resettable over-current protection function includes a light source module, a power supplying module, a DC-to-DC converting module, an over-current short-circuit protection module, a reference voltage generating module and a self-locking protection module. The power supplying module generates an input voltage. The DC-to-DC converting module converts the input voltage into a driving voltage to drive the light source module. The over-current short-circuit protection module generates a voltage detecting by detecting a driving current passing through the light source module. The reference voltage generating module generates a reference voltage according to the input voltage and the voltage detecting signal. The self-locking protection module generates a control signal according to the input voltage and the reference voltage to turn off the over-current short-circuit protection module in order to perform a self-locking protection mode, such that the DC-to-DC converting module is disconnected from the light source module.

The invention provides a short circuit protection system and a bidirectional rail alternating current traction system. The short circuit protection system is coupled with a converter, and the converter is coupled with an alternating current bus through a switch; the short-circuit protection system comprises a sampling circuit, a processor and a short-circuit detection device. The sampling circuit is coupled with the direct current end of the converter and is configured to convert a first electric signal of the direct current end into a first voltage signal; the processor is configured to convert a second electric signal of the direct current end into a second voltage signal; the short-circuit detection device is coupled with the output end of the sampling circuit and the output end of the processor, and is configured to perform near-end short-circuit detection based on the first voltage signal and perform far-end short-circuit detection based on the second voltage signal; under the condition that near-end short circuit and / or far-end short circuit occurs, a short-circuit protection enable signal is output; the processor is further configured to respond to the short circuit protection enable signal, block the converter and turn off the switch.

The invention belongs to the technical field of aircraft power supply systems, and particularly relates to an aircraft single-phase emergency alternating current power supply system and a switching method. Comprising an AC power distribution box, an emergency AC power control box, a DC power distribution box, a power control and display module and a static converter. The alternating current power distribution box is used for connecting an onboard main alternating current power supply or an auxiliary alternating current power supply or a static converter power supply, supplying power to alternating current electric equipment and transmitting a single-phase normal alternating current bus bar power supply to the emergency alternating current power supply control box; the emergency AC power supply control box is used for carrying out real-time power loss monitoring on a single-phase normal AC bus bar in the AC power supply distribution box, connecting the single-phase normal AC bus bar in the AC power supply distribution box with a single-phase emergency AC bus bar when power loss is monitored, and connecting the single-phase emergency AC bus bar with the single-phase normal AC bus bar in the AC power supply distribution box when power loss is monitored. The static converter is connected with the single-phase emergency AC bus bar, and self state information and output power information of the static converter are fed back to the power control and display module; the direct-current power supply distribution box is used for accessing an airplane direct-current power supply, providing an emergency direct-current power supply for the power supply control and display module and the static converter, and realizing power supply input control and short-circuit protection of the static converter; and the static converter is used for converting the emergency direct-current power supply output by the direct-current power supply distribution box into a single-phase alternating-current power supply and feeding back state information of the static converter to the power supply control and display module. The problem of reliable and automatic conversion of the single-phase emergency alternating current power supply under the condition that the airplane loses a main power supply system and an auxiliary power supply system and a normal alternating current bus bar loses power is solved.

The utility model discloses a battery monomer, a battery device and a power utilization device. The battery cell includes a housing, an electrode assembly, and a current collector. The shell comprises a wall part; the electrode assembly is accommodated in the housing, and one side, facing the wall part, of the electrode assembly is provided with a first tab. The current collector is arranged between the first tab and the wall part and comprises a first connecting part, a second connecting part and a fusing part; the first connecting part is connected to the wall part and is spaced from the first tab; the second connecting part surrounds the first connecting part, is connected to the first tab and is spaced from the wall part; the fusing part is connected with the first connecting part and the second connecting part, and the fusing part, the first tab and the wall part are arranged at intervals. When internal short circuit occurs in the single battery, the fusing part can be fused under the action of instantaneous high temperature, so that a current loop in the single battery is disconnected, a short-circuit protection effect is achieved, potential safety hazards such as fire and explosion caused by short circuit of the single battery are reduced, and the reliability of the single battery is improved.

The invention belongs to the field of battery short-circuit protection, relates to a data analysis technology, and aims to solve the problem that the short-circuit protection response performance of a battery in the charging and discharging process cannot be tested and analyzed in the prior art, in particular to a short-circuit protection response monitoring and control system based on battery charging and discharging, which comprises a monitoring and control platform, the monitoring control platform is in communication connection with a short circuit test module, an evaluation analysis module, an optimization processing module and a database; the short-circuit test module is used for performing short-circuit test analysis on the battery: marking the battery subjected to the short-circuit test analysis as a test object, and performing a charging response test and a discharging response test on the test object in sequence to obtain response data; according to the invention, short-circuit test analysis can be carried out on the battery and response data can be obtained, short-circuit protection response performance of the charging loop and the discharging loop can be fed back according to the charging response value and the discharging response value in the response data, and data support is provided for the evaluation and analysis process.

The invention discloses a drop-out fuse, and relates to the technical field of short-circuit protection switches. Comprising an insulator; the upper support arm is fixed at the upper end of the insulator and is provided with an elastic clamping contact mechanism; the lower supporting arm is fixed at the lower end of the insulator, is arranged on the same side with the upper supporting arm and is provided with a pawl and a jacking spring, the pawl can slide up and down relative to the lower supporting arm, and the jacking spring is used for driving the pawl to move in the direction away from the upper supporting arm; the flicking device is mounted on the lower support arm; the lower end of the fusion tube is hinged to the lower supporting arm, the upper end of the fusion tube can be clamped with the elastic clamping contact mechanism, a ratchet wheel is fixed to the lower end of the fusion tube, and under the condition that the ratchet wheel is matched with the pawl, the fusion tube can be limited to rotate towards one end away from the insulator; and the fuse wire is arranged in the fusion tube in a penetrating manner, one end of the fuse wire is fixedly connected with the lower support arm, and the other end of the fuse wire can be clamped with the elastic clamping contact mechanism and is in transmission connection with the pawl. According to the invention, the connection stability of the fusion tube under the switching-on condition can be ensured.

The embodiment of the invention provides a method and device for inverter control, an inverter, a motor system, a computer readable medium and a computer program product. The method can comprise the steps of determining whether a plurality of bridge arms of the inverter can enter an active short circuit (ASC) state or not under the condition of determining that the inverter needs to enter an ASC protection mode; and under the condition of determining that at least two bridge arms in the plurality of bridge arms can enter the ASC state, controlling the at least two bridge arms to be alternately in the ASC state.

The invention discloses an active protection control system and method of a motor controller and an electric vehicle. Comprising a phase current frequency detection module, a voltage conversion module, a driving chip, a control module, a high-voltage alternating-current electricity taking module and a power module, the phase current frequency detection module is used for detecting a real-time phase current frequency value of a three-phase winding of the motor in real time; the control module is used for storing a phase current frequency limit value and outputting an enable signal of the voltage conversion module; the high-voltage alternating current power taking module is used for obtaining at least one phase of alternating current in the three-phase alternating current and supplying power to the voltage conversion module; the voltage conversion module is used for receiving the voltage conversion enable signal, starting working, converting at least one phase of alternating current into working voltage required by the power module, and outputting the working voltage to a fault pin of the driving chip and a grid electrode of a driving tube of an upper bridge arm or a lower bridge arm in the power module; the active short-circuit protection of the motor in a galloping or overspeed state is realized, and the overvoltage damage of the motor controller is avoided.

The invention relates to the technical field of electric power measurement, in particular to a self-calibration method and system for measuring the metering function of a switch, and the method comprises the steps: a standard signal source carries out the current data point collection of a data collection time period at a fixed collection frequency, carries out the filtering processing of the collected data of the current data point, and obtains the current value of the data collection time period; determining a reference current signal required to be output by a standard signal source based on the acquired current value of the data acquisition time period; the metering module samples a reference current signal output by the standard signal source to obtain a metering sampling current; and carrying out error threshold comparison on the difference between the metering sampling current and the reference current signal, and carrying out self-calibration adjustment on the measurement switch based on a comparison result. Metering deviation is corrected in time, misoperation of overload protection and short-circuit protection is avoided, meanwhile, field calibration operation is simplified, and the self-calibration function can be completed without complex test equipment.

A short-circuit protection circuit in a battery protection system having a battery, a charge switch and a discharge switch connected in series. The short-circuit protection circuit includes: a drive unit having a first output terminal coupled to a control terminal of the discharge switch and a second output terminal coupled to a control terminal of the charge switch, and configured to output a discharge drive signal through the first output terminal to turn on or off the discharge switch, and output a charge drive signal through the second output terminal to turn on or off the charge switch; and a short-circuit detector configured to perform a short-circuit protection when the short-circuit occurs. One of the charge drive signal, the discharge drive signal and a power supply having a higher voltage is configured to supply power to the short-circuit detector.

The utility model discloses a photovoltaic inverter circuit, an inverter and a system, and the photovoltaic inverter circuit comprises a frequency conversion circuit; a multi-path short-circuit protection circuit; the multi-path boost circuit comprises at least two boost modules, each boost module comprises at least two boost circuits, and the output ends of all the boost modules are cascaded and connected with the input end of the frequency conversion circuit; the positive input end of each booster circuit is used for being connected with the positive electrode of a photovoltaic module, the negative input end of each booster circuit is connected with the negative electrode of the photovoltaic module through a short-circuit protection circuit, and the positive electrode connected with the positive input end of each booster circuit and the negative electrode connected with the negative input end of each booster circuit through the short-circuit protection circuit belong to the same photovoltaic module; wherein each short-circuit protection circuit is used for stopping outputting the current of the negative electrode of the connected photovoltaic module to the negative input end of the booster circuit. According to the technical scheme of the utility model, the inverter can be protected when the non-isolated string type photovoltaic inverter is short-circuited to the ground.

The invention discloses a hybrid excitation synchronous motor control method and system, and belongs to the technical field of motor control. The problem that a motor control system can operate at high precision when a position sensor breaks down is mainly solved. The method comprises the following steps that when a position sensor breaks down, a system is switched to an active short circuit protection (ASC) mode, and operation of a motor is controlled by giving instruction values of d-axis current and q-axis current in the mode; then, in an ASC mode, estimating a rotor angle through a voltage equation in a static coordinate system, so as to obtain an electrical angle of a rotor; after the rotor angle estimation is completed, the system is switched from the ASC mode to the vector control mode without the position sensor, and the d-axis voltage and the q-axis voltage are adjusted in the mode, so that the motor can be continuously and accurately controlled and stably run. The invention provides an efficient and safe motor control method, and the safety and reliability of the electric vehicle under the condition of sensor fault are effectively improved.

The invention discloses an LED display screen short circuit protection circuit and method, and the circuit comprises a plurality of relays which are correspondingly connected between a plurality of screen body units and a power supply; the plurality of current detection modules are correspondingly connected between the plurality of screen body units and the relay; the relay control driving module is respectively connected with the plurality of relays so as to control the on-off of the corresponding relays; the sub-controller obtains the real-time current corresponding to each screen body unit detected by the current detection module, compares the real-time current with a preset current, controls the relay control driving module to disconnect the relay corresponding to the corresponding screen body unit when the real-time current is greater than the preset current, so as to cut off the power supply of the power supply to the corresponding screen body unit, and meanwhile, controls the relay control driving module to switch off the relay corresponding to the corresponding screen body unit when the real-time current is greater than the preset current. And sending the acquired current abnormal data to a main controller, so that the main controller sends the current abnormal data to an operation and maintenance end and triggers an alarm system of the operation and maintenance end.

The invention belongs to the field of power distribution network automation, and discloses a controllable drop-type intelligent fuse and a control method thereof. The controllable drop-type intelligent fuse comprises a measurement and control module which is arranged at the lower part of a fusion tube and is used for measuring the working current of the fuse, the high voltage of a line, the temperature of a fuse wire, the poor contact state of the fusion tube and the drop state of the fusion tube through a sensor and a corresponding measurement circuit, and communicating with a background server through a wireless communication function; the measurement and control module is connected with a configured micro motor and a measurement and control module torque output rotating shaft; the lower contact is provided with a novel tensioning structure which is used for enabling the fuse to be controlled to fall off. On the basis of keeping the function of an original traditional drop-out fuse as a short-circuit protection switch, a measurement control and wireless communication circuit is added; working current, fuse wire temperature and drop state can be measured, drop of the fuse can be controlled automatically or wirelessly and remotely when primary current is larger than a set value, and therefore load overcurrent protection is achieved.