2230 results about "Cut-off" patented technology

The invention relates to the technical field of transmitters, and discloses an intelligent monocrystalline silicon pressure difference transmitter which comprises a sensor, diaphragms are arranged on the left side and the right side of the sensor, a first process flange is installed on the front side of the sensor, a second process flange is installed on the rear side of the sensor, and a machine body is fixedly connected to the upper surface of the sensor. A displayer is installed on the front side of the machine body, the sensor is electrically connected with the machine body, and an overload plugging device is arranged on the inner wall of the second process flange. The overload plugging device comprises a U-shaped guide frame, the U-shaped guide frame is installed on the inner wall of the second process flange, and the inner wall of the U-shaped guide frame is connected with a connecting rod in a sliding mode. According to the invention, through the arrangement of the overload plugging device, the interface part can be cut off when the tested pressure end of the transmitter is subjected to overlarge instantaneous pressure, so that the impact of the instantaneous pressure on the diaphragm of the tested pressure end is reduced, and the protection performance of the transmitter on the large instantaneous pressure is improved.

The invention relates to the technical field of power distribution automation auxiliary power supply control, and discloses an intelligent power distribution circuit system for a digital ring main unit, which comprises a transient voltage gradient induction bridge circuit, a hardware signal processing circuit, a power switch unit and a controlled energy release unit, according to the system, a transient voltage gradient induction bridge circuit is used for collecting a primary side bus voltage change rate signal, a hardware signal processing circuit carries out derivation operation on an induction signal and compares the induction signal with a voltage gradient threshold value, and a power switch unit is blocked at the moment that the voltage abnormally drops so as to cut off a load current path. According to the invention, a hardware parameter direct mapping mechanism is utilized to realize microsecond transient protection response, and the physical decoupling of protection logic and digital software is realized by balancing bus potential pulse caused by sudden unloading of a load through the inherent dehumidification resistor in the multiplexing cabinet.

The invention provides an intelligent socket control system and method based on an overvoltage and undervoltage protector, and relates to the technical field of intelligent socket control. Load bias utility of an intelligent socket under different working conditions is extracted, load attribute identification is performed on voltage state information, and a load identification tag of a load side in an intelligent socket access circuit is generated; determining a voltage out-of-limit level of the voltage at the front end of the intelligent socket in an overvoltage and undervoltage state; after the dissimilatory breaking criterion is executed to cut off a load power supply loop, a reset response strategy corresponding to the voltage at the front end of the intelligent socket is generated, and then a tolerance adaptation rule of the voltage at the front end of the intelligent socket when the overvoltage and undervoltage fault is removed is determined; and performing adaptive resetting on the power supply planning table of the power supply state in the current intelligent socket access circuit according to the voltage out-of-limit level and the tolerance adaptation rule. According to the invention, differentiated adaptive control can be carried out on load power supply under the activation of an overvoltage and undervoltage protection mechanism, so that the adaptability of the intelligent socket to complex working conditions is improved.

A high-linearity grid voltage bootstrap circuit relates to the technical field of analog-to-digital conversion and comprises a first charge pump boosting unit, a second charge pump boosting unit and a grid voltage bootstrap unit, working states of a sampling switch are divided into a sampling state and a holding state, an input voltage VIN is boosted to a VG through the grid voltage bootstrap unit in a sampling stage, and the sampling switch is switched on; and the holding stage sampling switch is cut off, and charges are injected to the upper polar plates of the capacitors C3 and C4 of the gate voltage bootstrap unit through the first charge pump boosting unit and the second charge pump boosting unit respectively. According to the invention, the problem that the actual gate-source voltage is reduced due to the grid parasitic capacitance of the sampling switch is solved, and the layout area occupation is greatly reduced while the bootstrap voltage is improved; the proportion of the capacitor C3 and the capacitor C4 can be flexibly set to obtain the required bootstrap voltage; and the problem that the on-resistance of the sampling switch is increased due to the reduction of the gate-source voltage can be solved, and the linearity of the sampling switch is improved.

The invention provides an intelligent fuse, and belongs to the technical field of circuit protection, and the intelligent fuse is characterized in that an upper housing is provided with at least one excitation chamber, the excitation chamber is internally provided with at least one excitation part and at least one impact part, and the excitation part releases high-pressure gas when receiving any one of an external trigger signal and an internal trigger signal; the lower shell is provided with at least one cooling cavity; the current-conducting plate is arranged between the upper shell and the lower shell, and the impact part moves towards the direction where the cooling cavity is located under the thrust action of the high-pressure gas so as to cut off the current-conducting plate; the self-control module is arranged outside the shell and comprises a current detection unit and a processing unit, and the current detection unit is used for detecting a current signal on the conductive plate; the processing unit is used for generating an internal trigger signal according to the current signal. The beneficial effects of the invention are that a dual-trigger mechanism and redundancy design of an internal trigger signal and an external trigger signal are adopted, so that normal action can still be ensured when any signal fails, and the breaking reliability is improved.

The invention relates to the technical field of power system protection, in particular to an underground power distribution network single-phase grounding protection system and method based on a signal injection method. The system comprises a signal acquisition module, a measurement and control protection module and an online monitoring module. According to the invention, by injecting the independent direct current signal and combining a zero-sequence fundamental wave time sequence identification algorithm and a traveling wave distance measurement method, rapid detection, high-precision positioning and selective protection of the single-phase earth fault of the underground low-voltage power distribution network are realized, and the method is suitable for complex environments such as coal mines and metal mines; through insulation value on-line monitoring and electric leakage protection, the ground insulation value level of a line is reflected to the voltage change of an additional direct current signal and a reactor neutral point. A zero-sequence fundamental wave time sequence identification model is adopted for electric leakage fault judgment so as to judge the fault type. By outputting a relay signal, on-off control is performed on a protected branch, so that a fault line can be quickly cut off when a fault occurs, and equipment and a bus are protected from being damaged by the fault.

The invention provides a gate driving device and a display panel, and relates to the technical field of display driving. The gate driving device comprises a cascade transmission circuit, a first frequency dividing circuit and a first output circuit. Wherein the cascade transmission circuit is connected with a first node and used for controlling the potential of the first node according to a cascade transmission signal, and the first frequency dividing circuit is used for controlling the potential of a second node according to the potential of the first node and a first frequency dividing signal transmitted by a first frequency dividing line; the first output circuit comprises a sixth transistor; and when the first node is in a low level state, the potential of the second node is maintained above a preset threshold voltage, so that the sixth transistor is cut off or conducted in a linear region. When frequency division switching needs to be carried out, even if the second node is in a passive high-level state, and the first node is in a low-level state, the potential of the second node is maintained above a preset threshold voltage, so that the sixth transistor is cut off or conducted in a linear region, and display abnormity caused by output abnormity of a first gate driving signal during frequency division switching is avoided.

The invention discloses a virtual reactive power plant user single-phase asynchronous motor reactive power regulation method, and relates to the technical field of electrical equipment control, and the method comprises the steps: collecting the real-time state data of a key node of a power distribution network, and building a short-term prediction model based on the state data; setting a judgment condition according to a prediction result of the model, generating a preliminary reactive power regulation instruction, and adjusting the priority and the regulation amplitude of the preliminary reactive power regulation instruction in real time based on dynamic updating of a prediction trend; issuing the adjusted reactive power adjustment instruction to a user terminal, and performing cooperative processing based on distributed coordination control to generate a final cooperative adjustment instruction; executing an action of cutting off the split-phase capacitor of the single-phase asynchronous motor according to the coordinated adjustment instruction; according to the invention, the split-phase capacitance of the single-phase asynchronous motor at the user side is regulated and controlled by using the virtual reactive power plant, so that low-cost, quick-response, continuous and accurate reactive power regulation is realized, and the problems of reactive power excess and high voltage of a power grid are effectively solved.

The invention provides a combined full-range controllable protection device, which belongs to the technical field of circuit protection and comprises a trigger body, a breaker and a fuse. The trigger body and the breaker are connected in series, and the trigger body and the breaker which are connected in series are connected in parallel with the fuse; when the circuit is abnormal, the trigger body is fused to carry out primary protection on the circuit, the fused trigger body also generates an electric signal and transmits the electric signal to the breaker, the breaker cuts off the circuit to carry out secondary protection on the circuit, current flowing through the trigger body and the breaker is merged into a branch where the fuse is located, and the fuse is fused to form third-level protection on the circuit; therefore, multi-stage protection is realized through the trigger body, the breaker and the fuse, and the time sequence cooperation of multi-stage protection actions not only avoids misoperation, but also can provide redundancy protection when a serious fault occurs, so that quick response and reliable cut-off when the circuit is abnormal are realized on the basis of keeping low loss when the circuit is normal, and the circuit breaker can be suitable for high-voltage and large-current breaking.

The invention relates to an intelligent identification and conversion control method for a charging interface of a multi-standard charging pile in the field of new energy automobiles, and the method comprises the steps: carrying out the mode matching analysis of interface physical feature data and communication signal feature data, and obtaining a preliminary classification result of the type of a charging interface device; according to the loading result of the communication configuration parameters, obtaining a confirmation feedback signal of successful protocol switching; judging whether the load demand data conforms to a rated output power range of a charging interface device or not; according to the authorization instruction, current intensity data including a peak value and an average level and voltage level data including a fluctuation amplitude in the charging process are monitored in real time; if the current intensity data or the voltage level data exceed a preset safety threshold value, power supply connection is disconnected, and a circuit path is cut off; and generating a power-off record log containing abnormal fluctuation data and a power-off moment according to a result of disconnecting the power supply connection.

The embodiment of the invention discloses a semiconductor device, a manufacturing method, a power module, a power conversion circuit and a vehicle. The semiconductor device includes a semiconductor body including a first surface, a second surface, a first device region, and a second device region; the first device region comprises a well region, a first region and a channel layer, and the first region is in contact with the channel layer; a gate trench; a first insulating layer; a first trench located in the second device region; the second device region further comprises a second insulating layer and a filling layer; a trench gate; an interlayer insulating layer; a Schottky metal layer; a drain electrode; and a source electrode. According to the technical scheme of the embodiment of the invention, the depletion type semiconductor device is formed and is in a conducting state and a cut-off state in a normal state, negative voltage needs to be applied between the grid electrode and the source electrode to cut off the channel, the response can be faster, the current circulation can be controlled, and the conducting loss is smaller. And a Schottky structure is integrated, so that the forward conduction voltage drop of the device is reduced, and the energy loss of the device in a reverse follow current state is reduced.

The invention relates to the technical field of circuit breakers, and discloses a fast-to-install primary and secondary fusion pole-mounted circuit breaker which comprises an installation frame and a circuit breaker body arranged on the installation frame, and core power electronic components such as an insulated gate bipolar transistor (IGBT) chip and a module are integrated in the pole-mounted circuit breaker body. The mounting rack is used for mounting a circuit breaker body to realize the functions of automatically cutting off a circuit and remote communication when a fault occurs, the mounting rack comprises a clamping assembly and a supporting piece, the supporting piece is used for mounting the circuit breaker body, and the clamping assembly is used for fastening the supporting piece on a telegraph pole. According to the pole-mounted circuit breaker, assembling and wiring of the circuit breaker body are completed on the ground firstly, then the circuit breaker body is rapidly fixed to the telegraph pole through the installation frame, the effect of improving the installation efficiency and reliability of the pole-mounted circuit breaker is achieved, and meanwhile the use flexibility of the installation frame is high.

The invention relates to the field of load control, in particular to a non-fixed load accurate removal method based on load control fairness and effectiveness consideration. Comprising the following steps: acquiring the frequency of a power grid system, calculating the frequency change rate, judging whether to send a'preparation for load shedding 'instruction to all substations by monitoring the frequency of the power grid system and the frequency change rate, entering a load shedding amount calculation stage, and calculating the load amount needing to be cut off in each region through a dynamic weighted load precise cutting algorithm, calculating a total load shedding amount; based on the load capacity needing to be cut off in each area, the substation optimizes the cut-off combination of the load lines in the areas, after optimization is completed, the substation executes cut-off, and the master station monitors the frequency and the frequency change rate of the power grid system after cut-off and judges whether a locking condition is met or not so as to stop further cut-off. The technical problems that power grid frequency monitoring mostly depends on low-sampling-rate equipment, the rapidly-changing frequency dynamic state is difficult to capture, and instability detection lags or misjudgments are caused are solved.

The invention provides a power cooperative control method, device and system based on load removal and a medium. The method is applied to a micro-grid configuration flexible interconnection device for micro-grid fault protection. After the fault is positioned, a VSG low-voltage ride-through strategy is adopted to carry out current limiting, an importance quantification model is constructed for loads, and according to a real-time operation condition, a shearable load with the minimum influence on the system is screened to carry out priority removal; and dynamic power transmission adjustment of the flexible interconnection device is synchronously triggered, a micro-grid power flow path is reconstructed, and finally a fault is removed based on a current limiting and directional element protection method. According to the invention, system protection is realized by fusing intelligent load removal and flexible power adjustment, and the fault isolation speed and the stability of the microgrid system are effectively improved.

The invention relates to the technical field of circuit breakers, in particular to a primary and secondary fusion complete column-mounted circuit breaker which comprises a mechanism box, a plurality of insulating cylinders fixed to the top end of the mechanism box and a supporting frame transversely fixed to the inner wall of one side of the mechanism box. A plurality of hanging rings are fixed to one side of the top end of the mechanism box, a limiting sliding groove is formed in the supporting frame in a penetrating mode, an inclined triggering assembly is arranged in the limiting sliding groove, and through arrangement of the inclined triggering assembly and an adjusting assembly and cooperative operation between the inclined triggering assembly and the adjusting assembly, the inclined triggering assembly can be adjusted; when a telegraph pole is inclined due to the influence of extreme weather or external force, the primary and secondary fusion complete column-mounted circuit breaker can automatically separate the moving contact from the static contact, so that quick power failure is realized, manual intervention is not needed in the process, the circuit can be cut off at the first time when a dangerous case occurs, and the safety of the telegraph pole is ensured. The electric shock risk possibly encountered when pedestrians approach the inclined telegraph pole is avoided fundamentally, and the overall use safety is improved.

Technology for programing NAND memory. A memory system has control circuitry that applies a low voltage (e.g., VSS) to SGS lines in one or more unselected blocks that neighbor a block that has been selected for programming. This low voltage keeps source select transistors off, which cuts off the NAND channels in the neighbor unselected block(s) from the source line. The control circuit may float the SGS lines in other unselected blocks, which allows the source line voltage to ramp up quickly to provide for a faster programming operation.

The invention discloses a semiconductor laser and a preparation method thereof, which can be used in the field of semiconductor device preparation, and the method comprises the steps: firstly, providing a first conductive type substrate; then, epitaxially growing a buffer layer of a first conduction type, a lower optical waveguide limiting layer, a quantum well active light-emitting layer, an upper optical waveguide limiting layer, a corrosion barrier layer, a current injection layer and an intrinsic ohmic contact layer on the substrate in sequence to obtain a multi-layer epitaxial layer; then, etching the multi-layer epitaxial layer to the corrosion barrier layer based on a preset pattern to form a ridge-shaped table which starts from the intrinsic ohmic contact layer and is deeply cut off to the corrosion barrier layer; and finally, performing particle doping in a region corresponding to the ridge-shaped table, and converting one sides, close to the corrosion barrier layer, of the intrinsic ohmic contact layer, the current injection layer, the corrosion barrier layer and the upper optical waveguide limiting layer into a second conduction type. Therefore, current limitation can be realized without performing multiple epitaxy like a traditional buried heterojunction, and the production cost and the process difficulty are greatly reduced.

The invention relates to a fuse and electric equipment. The fuse comprises a shell, an electric connection unit, an action unit and an excitation unit. The shell is provided with a first cavity and a second cavity, and a communicating hole is formed in the cavity wall of the first cavity so that the first cavity can communicate with the second cavity. The electric connection unit is mounted on the shell and comprises a connection bar and a melt which are connected in parallel; the action unit comprises a first breaker movably installed in the first chamber and a second breaker movably installed in the second chamber. The excitation unit is mounted on the shell; wherein the excitation unit is used for driving the first disjunction device to disconnect the connecting bar, and is also used for driving the second disjunction device to disconnect the melt after the first disjunction device disconnects the connecting bar; and when the first breaking device does not cut off the connecting row, the first breaking device blocks the communicating hole. The invention aims to provide the fuse with the arc extinguishing capability and the breaking capability.

The invention belongs to the technical field of electrical equipment monitoring, and provides an intelligent monitoring method and system for building construction electrical equipment in order to solve the problems that the monitoring dimension is single and hidden dangers such as electrical fires and mechanical faults are difficult to find in advance, and the method comprises the steps that a data collection module collects electrical parameter data and images; the data processing module processes the data; the image analysis module identifies abnormal conditions; the data analysis module identifies abnormal conditions; the comprehensive evaluation module is used for comprehensively evaluating and predicting potential risks; and the intelligent decision support module optimizes a dynamic power supply strategy. According to the invention, early warning of hidden dangers such as electrical fire and mechanical faults is realized; the fault trend of the equipment is predicted, the downtime of the equipment is reduced, the fault is quickly positioned, and the power supply is quickly cut off when abnormality of the electrical equipment is detected; and the operation temperature of the equipment is maintained in a safe interval.

The invention discloses a withstand voltage tester with a protection function, and belongs to the technical field of withstand voltage testers. When the withstand voltage tester leaks electricity, after an electromagnet is powered off, no magnetic force is generated between a magnetic attraction block and the electromagnet, and the elastic support of a second spring can drive a pull plate to move; the pull plate drives the clamping block to horizontally move and is separated from the clamping groove in the electroprobe connecting seat, the electroprobe connecting seat is in a free moving state in the terminal sleeve, and then the first spring drives the piston ring to move in the cavity of the fixing ring through the elastic support of the first spring in the fixing ring; the piston ring drives the pressing ring to move outwards and extrudes the connecting plug on the electroprobe connecting seat, the connecting plug can be separated from the power connection terminal and pop out of the terminal sleeve after being pushed, the purpose of rapidly separating the power connection terminal from the connecting plug is achieved, the connection state between the electroprobe assembly and the tester main body can be cut off in time, and the testing efficiency is improved. Threatening of electric leakage to personal safety is prevented, and the use safety of the withstand voltage tester is improved.

The invention provides a cold heading cutting forming mechanism and a using method, and belongs to the technical field of cold heading machining. Comprising a forming mechanism body, a forming cavity is formed in the inner side of the front portion of the upper end of the forming mechanism body, a cold heading cutter is arranged on the right side of the forming cavity, a protective mounting module is arranged at the upper end of the cold heading cutter, and a control panel is arranged above the right end of the protective mounting module. Through cooperation of the infrared emitter and the infrared reflecting mirror, the cross block and the cold heading cutter holder are adjusted to be perpendicular to each other according to the action of infrared reflection, and then when a metal wire is cut, once the cutting angle of the cold heading cutter deviates due to abrasion or other factors, the cross block and the cold heading cutter holder can be adjusted to be perpendicular to each other. When the metal wire is processed, the infrared emitter and the infrared reflecting mirror deviate, at the moment, the programmable logic controller receives a signal and transmits the signal to the control panel, and the cold heading cutter is powered off in time, so that the cold heading cutter is protected, and the safety of the metal wire during processing can be improved.

The utility model provides a detection control circuit, a battery management circuit and a battery pack. The detection control circuit is used on a sampling line of a battery cell and connected between a positive electrode or a negative electrode of the battery cell and a sampling resistor on the sampling line, the detection control circuit comprises a resistor, a switching tube, an operational amplifier circuit and a control circuit, and when a first voltage value is larger than a preset value, the control circuit controls the switching tube to be switched off; after the switch tube is switched off for a preset time, the control circuit controls the switch tube to be switched on again; when the second voltage value is larger than the preset value, the control circuit controls the switch tube to be disconnected again, and when the second voltage value is smaller than or equal to the preset value, the control circuit controls the switch tube to be kept on. Whether abnormal surge current or short-circuit large current is generated on the sampling line is actively monitored, meanwhile, on-off control over the sampling line is achieved, the sampling line is cut off when the abnormal surge current or the short-circuit large current is generated, and the problem of device damage such as abnormal fusing of a fuse is prevented.

An on-line program control excitation power supply with quench protection for a high-temperature superconducting magnet comprises a single-chip microcomputer for receiving control data, outputting control voltage through digital-to-analog conversion (DAC) of the single-chip microcomputer, and magnetizing a magnet coil through current stepping; a sampling signal is output to the liquid crystal screen to display corresponding voltage and current values in real time after being processed by the single-chip microcomputer analog-to-digital conversion ADC; voltage signals at the two ends of the magnet coil are sampled and returned to the single-chip microcomputer to be processed, when high voltage occurs, it is judged that the voltage signals are abnormal voltage signals, quench protection is carried out, the single-chip microcomputer outputs control signals to cut off connection between the magnet coil and the excitation power source, and residual energy of the magnet coil is released through the high-power thyristor. The provided excitation power supply has the characteristics of high power, high stability, good repeatability and good linearity; performing numerical control stepping output, gradually applying current to the superconducting coil, and slowly establishing a magnetic field; effective quench protection is achieved, and it is guaranteed that a magnet coil is not damaged by quench.

The utility model provides an automatic protection type steam station electric iron which comprises a machine base, an iron body, a safety switch and a switch control mechanism, the machine base is provided with a containing bin used for containing the iron body, and the iron body, the safety switch and the machine base are electrically connected through wires. The switch control mechanism and the safety switch are correspondingly arranged, and the iron body is in contact control connection with the switch control mechanism. Through the arrangement, when the iron main body is placed in the storage bin of the machine base, the iron main body immediately triggers the switch control mechanism, the switch control mechanism controls the safety switch to cut off a circuit between the iron main body and the machine base, and the iron main body cannot be powered on; the situation that a consumer mistakenly touches an external power-on switch to heat the iron body in the machine base can be effectively avoided.

The invention relates to the technical field of generator control, and discloses an emergency control method, device and equipment for a generator set controller and a medium, the same generator set at least comprises two generator controllers, the method is applied to any current generator controller in the generator set, and the method comprises the following steps: determining whether a target generator controller has a fault or not; the target generator controller is another generator controller in the generator set; if the target generator controller breaks down, power supply of the target generator controller is cut off, and input of a first current and voltage signal and output of a control signal based on a target generator are conducted; and accessing the first current and voltage signal, and carrying out parallel operation control on the target generator and the current generator. According to the invention, the generator controlled by the faulty generator controller can be restarted to solve related faults caused by the faulty generator controller, and the normal generator controller automatically carries out parallel operation control on all generators without manpower, so that the operation reliability of the system is improved.

The invention provides a leakage protection method and device of a high-voltage charging system and a charging pile, and relates to the technical field of charging piles, and the method comprises the steps: obtaining leakage current data of the high-voltage charging system collected based on a fluxgate sensor or a tunnel magnetoresistance effect chip in a first time period; fitting a change curve by applying a third-order moving average algorithm according to the leakage current data, and judging whether the high-voltage charging system is subjected to insulation degradation or not according to the change curve; if it is determined that insulation degradation occurs, a high-voltage line of the high-voltage charging system is controlled to be cut off; according to the method, tiny electric leakage can be identified, and the tiny electric leakage can be prevented from developing into a serious fault through insulation degradation trend analysis, so that the detection performance is greatly improved.

The invention discloses an output overvoltage protection self-locking circuit and a switching power supply. The circuit comprises a first switching module, a second switching module, a first control self-locking module and a second control self-locking module, the first control self-locking module is used for determining that the output voltage exceeds the reference voltage, controlling the first switch module to cut off the power supply input, and self-locking and maintaining the cut-off state of the first switch module to the power supply input; and the second control self-locking module is used for determining that the output voltage exceeds the reference voltage, controlling the second switch module to cut off the output loop, and self-locking and maintaining the cut-off state of the second switch module to the output loop. According to the invention, two completely independent overvoltage protection loops are adopted to form a heterogeneous redundancy design, so that the reliability is greatly improved; in addition, self-locking after overvoltage protection can be achieved, the protection function can be released only when input power supply is restarted, and it is ensured that the system can be in a safe state continuously and stably.

The invention provides a charging system with high-voltage protection, which relates to the technical field of elevator emergency power supply and comprises a transformer, a voltage stabilizing circuit, a sampling circuit, an on-off circuit, a surge protection circuit, a constant current and voltage stabilizing circuit and a control circuit. The transformer reduces commercial power high voltage to low voltage; the voltage stabilizing circuit provides a stable direct-current power supply for the sampling and control circuit; the sampling circuit is used for conditioning the AC voltage and outputting a feedback signal; and the control circuit performs mode analysis by utilizing a pre-judgment algorithm according to the feedback signal so as to control the on-off circuit to cut off the mains supply input or switch the output mode of the constant current and voltage stabilizing circuit. Through an intelligent protection mechanism comprising sampling, control and on-off circuits, the device can be suitable for single-phase electric equipment, and quick and accurate response to abnormal high voltage is realized. And the transformer is adopted for voltage conversion and isolation, and the surge protection circuit and the on-off circuit are combined, so that the protection performance is ensured, and the overall cost and size of the system are effectively controlled.

An electric circuit breaker device includes: an igniter provided to a housing; a projectile disposed in an accommodating space formed in the housing, the projectile being to be projected along the accommodating space by energy received from the igniter; a conductor piece that is provided to the housing, forms a portion of an electric circuit, and includes in a portion thereof a cutoff portion disposed crossing the accommodating space and to be cut off by the projectile; and an arc-extinguishing region that is provided in the accommodating space and in which a coolant material is disposed, the arc-extinguishing region being configured to receive the cutoff portion after being cut off. The projectile includes a first projectile configured to cut off the cutoff portion from the conductor piece by being projected by the energy received from the igniter, and a second projectile configured to press, into the arc-extinguishing region, the cutoff portion cut off by the first projectile.

The invention discloses a digital quantity output control circuit and method integrating overcurrent instantaneous protection and delay recovery functions. The circuit is mainly composed of a sampling module, a delay module, a voltage following module, an alarm module, an optical coupler isolation module and a typical digital output switch control module. When an over-current phenomenon is detected, the protection circuit can respond quickly, the circuit is cut off immediately to realize protection, and an alarm signal is output synchronously. Thereafter, the protection state will last for a preset delay time. During the period, the processor can monitor an alarm signal and output a circuit turn-off control signal according to the alarm signal. And after the delay time ends, the protection delay circuit automatically recovers to an initial state, and at the moment, the processor takes over signal output control according to the control logic. According to the invention, over-current instantaneous protection and delay recovery functions of the digital output circuit and smooth switching controlled by the processor are successfully realized, and safety risks caused by over-current faults are effectively avoided.