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30 results about "Arc duration" patented technology
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Current-Based Method and Apparatus for Detecting and Classifying Arcs
ActiveUS20080021664A1Improve the level ofIncrease successMaterial breakdown voltageCellsEngineeringPower circuits
An apparatus and technique are provided for generating a plasma using a power supply circuit and arc detection arrangement. The power supply circuit has a cathode enclosed in a chamber, and is adapted to generate a power-related parameter. The arc detection arrangement is communicatively coupled to the power supply circuit and adapted to assess the severity of arcing in the chamber by comparing the power-related parameter to at least one threshold. According to various implementations, arc occurrences, arcing duration, intensity and / or energy are measured responsive to comparing the power-related parameter to the at least one threshold. According to further implementations, the above-mentioned measured quantities are accumulated and / or further processed. An apparatus and method are also provided for detecting arc events when the current spikes above a threshold level. The method and apparatus is also for classifying the arc events based on the voltage and current signals and the duration each is beyond a threshold value.
Owner:SCHNEIDER ELECTRIC USA INC
Monitoring method for electrical endurance of arc-extinguishing chamber of circuit breaker and determination method for initial time of arcing current
InactiveCN105425145ASolve the costEffective prediction of electrical lifeCircuit interrupters testingStart timeEngineering
The invention provides a monitoring method for electrical endurance of an arc-extinguishing chamber of a circuit breaker and a determination method for initial time of an arcing current, wherein the method have advantages of good adaptability, simple operation and precise determination. According to the invention, when an arc-extinguishing chamber is driven by a switchgear drive system to make motion, a force value of the drive system is reduced suddenly at time of separation of a static contact and a moving contact of the arc-extinguishing chamber, wherein the sudden reduction time of the force value is the separation starting time of the arc-extinguishing chamber. Therefore, the sudden reduction time of the force value can reflect the separation starting time of the arc-extinguishing chamber. However, because an intelligent electronic device needs to carry out amplification, processing, and analyses on the collected force signal, certain hardware and software delay exists, the sudden reduction time of the force value of intelligent electronic calculation can be corrected by using an actual breaking signal, thereby determining the hardware and software delay. On the basis of real-time monitoring and recording on a force value signal and a line current signal of the drive system of the circuit breaker, the initial arcing time, arcing duration time, and arcing current value during the cut-off process of the circuit breaker are determined.
Owner:CHINA XIDIAN GRP CO LTD
Arc time inductor and electrical life on-line monitoring system of circuit breaker
InactiveCN101788647AGood safety isolation performanceSensitive detectionCircuit interrupters testingElectricityMonitoring system
The invention discloses an arc time inductor and an electrical life on-line monitoring system of a circuit breaker, wherein the arc time inductor of the circuit breaker mainly comprises an insulating shell, an electromagnetic shielding layer, a magnetic core and a metal induction coil, wherein the electromagnetic shielding layer, the magnetic core and the metal induction coil are arranged in the insulating shell; the electromagnetic shielding layer is attached to the side wall and the inner side of the rear end surface of the insulating shell; the cylindrical magnetic core is positioned in the center of the insulating shell; the metal induction coil spirally encircles on the periphery of the magnetic core, and both ends of the metal induction coil respectively extend out of the insulating shell to be used as two output ends. The arc time inductor of the circuit breaker is arranged near an arc extinguish chamber of the circuit breaker, the front end of the arc time inductor is opposite to a detected contact, and the output end of the arc time inductor of the circuit breaker is connected to a mainframe of the monitoring system. The invention can accurately determine the initial arc time and the arc duration in the on-off process of the circuit breaker so as to ensure the electrical life on-line monitoring and the comprehensive judgment accuracy of the circuit breaker.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Current-based method and apparatus for detecting and classifying arcs
ActiveUS7981257B2Improve the level ofIncrease successCellsResistance/reactance/impedencePower flowPeak value
An apparatus and technique are provided for generating a plasma using a power supply circuit and arc detection arrangement. The power supply circuit has a cathode enclosed in a chamber, and is adapted to generate a power-related parameter. The arc detection arrangement is communicatively coupled to the power supply circuit and adapted to assess the severity of arcing in the chamber by comparing the power-related parameter to at least one threshold. According to various implementations, arc occurrences, arcing duration, intensity and / or energy are measured responsive to comparing the power-related parameter to the at least one threshold. According to further implementations, the above-mentioned measured quantities are accumulated and / or further processed. An apparatus and method are also provided for detecting arc events when the current spikes above a threshold level. The method and apparatus is also for classifying the arc events based on the voltage and current signals and the duration each is beyond a threshold value.
Owner:SCHNEIDER ELECTRIC USA INC
Non-contact pantograph-catenary arc detection system
InactiveCN102295015APrecise positioningEasy maintenanceVehicle route interaction devicesSensing dataUltraviolet lights
The invention discloses a non-contact pantograph-catenary arc detection system, which includes an optical imaging measurement device, an ultraviolet photoelectric sensing device and a data analysis and processing system. The device converts the optical signal into a pulsed current signal, and the data analysis and processing system analyzes the pulsed current signal into the duration and intensity of arcing and the number of arcing occurrences for each span. The area of the arc is precisely positioned. The invention applies the principle of ultraviolet photoelectric detection to pantograph-catenary arc detection technology for the first time, and uses the specific wavelength emitted by pantograph-catenary arc as its detection feature. By detecting the ultraviolet light emitted when pantograph-catenary arcing occurs, it is judged whether there is pantograph-catenary arcing, and parameters such as arcing time and intensity are calculated according to the corresponding algorithm, and the arcing site is checked through the existing database Positioning is convenient for future line maintenance and transformation.
Owner:CHENGDU TANGYUAN ELECTRICAL APPLIANCE
Current-based method and apparatus for detecting and classifying arcs
An apparatus and technique are provided for generating a plasma using a power supply circuit and arc detection arrangement. The power supply circuit has a cathode enclosed in a chamber, and is adapted to generate a power-related parameter. The arc detection arrangement is communicatively coupled to the power supply circuit and adapted to assess the severity of arcing in the chamber by comparing the power-related parameter to at least one threshold. According to various implementations, arc occurrences, arcing duration, intensity and / or energy are measured responsive to comparing the power-related parameter to the at least one threshold. According to further implementations, the above-mentioned measured quantities are accumulated and / or further processed. An apparatus and method are also provided for detecting arc events when the current spikes above a threshold level. The method and apparatus is also for classifying the arc events based on the voltage and current signals and the duration each is beyond a threshold value.
Owner:SCHNEIDER ELECTRIC USA INC
Vehicle electrical system arc detection apparatus and method
InactiveUS6594125B2Eliminate backgroundEliminate sperious noiseElectric propulsion mountingEmergency protective arrangement detailsFrequency filteringDistribution power system
Disclosed is a vehicle which includes an electrical system monitoring system which results in detecting arcing in the electrical distribution system of the vehicle and the ability to provide notification and protection for such arcing. The system functions to monitor the electrical distribution system of the vehicle to sense the frequencies of signals in the system using appropriate filtering. One type of filtering which may be used is based upon a heterodyning circuit which provides variable frequency filtering for filtering a signal representative of the current in at least one electrical circuit of the vehicle. The heterodyning circuit output is configured to produce a signal which may be logarithmically related to the filtered signal. If the output signal exceeds a predetermined limit (representative of noise) for a predetermined period (representative of a typical arc duration), the system generates an arc signal. The arc signal may then be used to operate a circuit interrupter or an indicator in a circuit protection system or both.
Owner:SIEMENS ENERGY & AUTOMATION INC +1
Arc Welding Method And Arc Welding System
The invention provides an arc welding method and an arc welding system. The arc welding method repeatedly includes unit welding periods of a droplet transfer period, an arc duration preparation period (T2) and an arc duration period (T3). In the droplet transfer period, welding currents are made to flow through in a method of determining a time average value of an absolute value to be a first value while a maximum value of the absolute value to be a second value between a consumption electrode and a base material, thereby making the droplet transferred to the base material from the consumption electrode. And in the period T2, the welding currents are made to flow through in a method that the maximum value of the absolute value is larger than the second value. And in the period T3, the welding currents are made to flow through in a method that the time average value of the absolute value is smaller than the first value, thereby generating arc duration between the consumption electrode and the base material. Thus, short circuit of the consumption electrode and base material in the arc duration period can be inhibited.
Owner:DAIHEN CORP
Arc extinguishing mechanism and direct-current circuit breaker
ActiveCN109360755ASolve the problem of long critical breaking arcing timeReliable breakingElectric switchesCircuit-breaking switch detailsElectricityDc circuit breaker
The invention provides an arc extinguishing mechanism and a direct-current circuit breaker. The arc extinguishing mechanism comprises a fixed contact, a movable contact and a permanent magnet. The fixed contact comprises a base and a bending portion positioned at a first quadrant of the base, and the bending portion is provided with an electric contact. The movable contact can rotate relative to the fixed contact, so that electric contacts of the movable contact and the fixed contact are in contact and / or separation, and a plane formed by rotation of the movable contact is a reference plane. The permanent magnet is provided with a first magnetic pole and a second magnetic pole opposite to the first magnetic pole, and the connecting line of the first magnetic pole and the second magnetic pole is not perpendicular to the reference plane. The direct-current circuit breaker comprises a substrate, a shell, a plurality of laminated gate pieces and the arc extinguishing mechanism. The arc extinguishing mechanism and the direct-current circuit breaker can effectively solve the problem of long low-current critical breaking arc duration of direct-current high voltage, and reliable breaking under the condition of forward and reverse current can be ensured.
Owner:BEIJING PEOPLES ELECTRIC PLANT
Method for detecting arc extinguishing performance of circuit breaker
InactiveCN110346715AJudging the arc extinguishing performanceRealize the detection purposeCircuit interrupters testingPower gridElectric power
The invention belongs to the technical field of electrical equipment detection, and particularly relates to a method for detecting arc extinguishing performance of a circuit breaker. A large number ofcircuit breakers are in a power grid, but the arc extinguishing methods of different types of circuit breakers are different, and a general method for detecting the arc extinguishing performance of the circuit breakers is needed. The invention provides a method for detecting arc extinguishing performance of a circuit breaker. The arc extinguishing performance of the circuit breaker is judged according to the electromagnetic wave signal and the arc duration time by detecting the electromagnetic wave signal radiated by a switch arc generated in the switching-on and switching-off process of thecircuit breaker. The method for detecting the arc extinguishing performance of the circuit breaker is wide in application range, and can achieve the detection purpose for various types of circuit breakers; and the arc extinguishing performance of the circuit breaker is judged by acquiring electromagnetic wave signals of the circuit breaker in the states of putting into operation, different operation years and reaching the service life, and the actual production requirement in the power industry is met.
Owner:YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
Cable initial-stage arc fault modeling method
ActiveCN112611942ATesting dielectric strengthFault location by conductor typesNonlinear resistorOvervoltage
The invention discloses a cable initial-stage arc fault modeling method. Initial-stage arc faults are main manifestation forms of early degradation of cable insulation. The method comprises the following steps: for a widely used cross-linked polyethylene (XLPE) cable, measuring a typical characteristic curve of initial-stage arc fault voltage of a cable through a high-voltage experiment; analyzing and counting four key characteristic quantities including an arc starting time point, arc duration time, arc combustion duration voltage and insulation recovery overvoltage of the initial-stage arc fault, and fitting voltage characteristics of the initial-stage arc fault by adopting a CSC function; and finally, based on the fitted initial-stage arc fault voltage function, constructing a cable initial-stage arc fault model of the time-varying voltage-controlled nonlinear resistor, and giving model parameters. According to the method, the blank in the aspect of cable initial-stage arc fault modeling is filled, a model basis is provided for early warning, analysis and positioning of subsequent cable initial faults, and the method has important practical value.
Owner:KUNMING UNIV OF SCI & TECH
Current aging technical device for vacuum arc-extinguishing chamber
The invention belongs to the technical field of electric parameter test of electric vacuum devices and particularly relates to a current aging technical device for a vacuum arc-extinguishing chamber. The current aging technical device consists of a stander, an opening and closing speed adjustment mechanism, a pneumatic reversing valve, a connection screw, the vacuum arc-extinguishing chamber, a direct current source, a power polarity conversion switch and a control system, wherein the respective parts of the device are fixed on the stander. The technical device is mainly characterized in that the control system controls a high-current direct current power supply to work and applies technically set rated current to two ends of the vacuum arc-extinguishing chamber; an electric arc which is generated transiently can burn out and remove glitches to implement one-time aging; the control system controls the pneumatic reversing valve to move in an opposite direction to drive a movable conductive rod in the vacuum arc-extinguishing chamber to do closing operation and then changes the polarities of power supplies applied to the two ends of the vacuum arc-extinguishing chamber after the aging is executed for technically set times; the opening and closing speed adjustment mechanism controls the opening speed and the closing speed of the vacuum arc-extinguishing chamber and the electric arc duration time by adjusting the gas pressure of the pneumatic reversing valve to meet technical requirements of different products.
Owner:湖北大禹汉光真空电器有限公司
Arc extinguish chamber of molded case circuit breaker
InactiveCN107799370AReduce the temperatureFacilitate dissociationElectric switchesCircuit-breaking switch detailsLow voltageEngineering
The invention discloses an arc extinguish chamber structure of a low-voltage molded case circuit breaker. A plurality of U-shaped metal grid pieces are horizontally stacked at intervals from top to bottom in the middle of the extinguish chamber structure; a fixed contact is located right under the metal grid pieces; a U-shaped arc striking piece is arranged right above the metal grid pieces; a gapis formed between the U-shaped arc striking piece and the metal grid pieces; two up-and-down vertical arc isolating walls are separately arranged on a left side and a right side outside a U shape formed by the metal grid pieces and the arc striking piece; two up-and-down vertical air production pieces are separately and fixedly attached on the left inner side wall and the right inner side wall ofthe interior of a U-shaped opening formed by the metal grid pieces and the arc striking piece; the two air production pieces are parallel to each other and face each other. According to the arc extinguish chamber structure, the air production pieces are additionally mounted in the U-shaped opening formed by the metal grid pieces and the arc striking piece; airflow is generated by erosion of electric arc and is used for driving the electric arc; the pressure of the arc extinguish chamber is improved; the temperature of the electric arc is favorably reduced; the deionization of the electric arcis accelerated; the arc duration is reduced, so that the breaking capability of the circuit breaker can be greatly improved.
Owner:JIANGSU PHONO ELECTRIC
Low-voltage circuit breaker
InactiveCN102623270AImprove breaking capacityShort durationCircuit-breaking switch detailsLow voltage circuitsEngineering
The invention relates to a low-voltage circuit breaker. The technical problem of long arc duration caused by the secondary electron emission of the conventional low-voltage circuit breaker is solved. The low-voltage circuit breaker comprises a shell, an arc extinguish chamber, a moving contact terminal and a fixed contact terminal, wherein the arc extinguish chamber, the fixed contact terminal and the moving contact terminal are arranged in the shell. The low-voltage circuit breaker is characterized by also comprising a contact terminal cover, wherein the contact terminal cover mainly comprising a base part and a gas production part connected with the base part; at least the gas production part is made from a gas production material; the gas production part is opposite to a spacing between the moving contact terminal and the fixed contact terminal; when the gas production part produces a gas, an arc enters the arc extinguish chamber; and moreover, the gas production part faces a moving contact on the moving contact terminal.
Owner:ZHEJIANG TENGEN ELECTRIC
Pantograph-catenary arcing measurement sensor calibration device and calibration method
ActiveCN113552523BConsider the impactEasy to fixElectrical measurementsTraction power supplyControl theory
The invention belongs to the technical field of detection and monitoring of traction power supply systems, and discloses a calibration device for pantograph-catenary arcing measurement sensors. Actual data to limit the working distance between the sensor to be calibrated and the light source for simulating the arc, based on the adjustment platform structure to realize the three-way adjustment of the pantograph-catenary arc sensor to be calibrated, and adjust the light transmission of different light sources through the rotating plate with a light hole Frequency, so as to calibrate the pantograph-catenary arcing duration, pantograph-catenary arcing times and pantograph-catenary arcing interval time measured by the pantograph-catenary arcing sensor in a way that is most close to the use environment. The calibration device can simultaneously calibrate multiple types of arc sensors, and simultaneously considers the influence of ambient interference light on the arc sensors. The invention also discloses a calibration method based on the pantograph-catenary arcing measurement sensor calibration device.
Owner:SOUTHWEST JIAOTONG UNIV +1
Welding control method, welding machine control device and welding machine
ActiveCN111037055BStable voltageImprove welding qualityWelding accessoriesControl engineeringProcess engineering
Owner:PANASONIC WELDING SYST TANGSHAN
Electrical contactor
An electrical contactor (10) comprises a first terminal (12) having a fixed member (30) with at least one fixed electrical contact (32), a second terminal (14), and at least one movable electrical contact (50) in electrical communication with the second terminal (14). A dual-coil actuator (64) is also provided and has a first drive coil (80) drivable to open and close the movable and fixed electrical contacts, and a second non-drive coil (82) feedback connected to induce a reverse flux to temper and stabilise a nett flux. Control of a delay time of the opening and closing electrical contacts is thus possible, so as to be at or adjacent to a subsequent or next zero-crossing of an associated AC load current waveform. A method of controlling electrical contact closing and opening delay, and a method of limiting or preventing electrical contact bounce and arc duration are also provided.
Owner:JOHNSON ELECTRIC SHENZHEN
Method for calculating influence of electric arc on oil flow rate in switching process of on-load tap-changer
PendingCN112069711AImprove reliabilityComputationally accurate implementationDesign optimisation/simulationSpecial data processing applicationsThermodynamicsTransformer
The invention relates to a method for calculating the influence of an electric arc on an oil flow rate in the switching process of an on-load tap-changer. The method comprises the steps: calculating electric arc energy: calculating the integral of voltage and current at two ends of the electric arc within the duration of the electric arc; calculating the volume of produced gas: calculating the volume of the produced gas according to the ratio of the electric arc energy to the energy required for producing the unit volume of gas; establishing a temperature field and fluid field coupling calculation model; and calculating the oil flow rate. The invention further discloses a system for calculating the influence of the electric arc on the oil flow rate in the switching process of the on-load tap-changer. By quantitatively characterizing the energy generated by the electric arc, the method and system can be suitable for transformers of different voltage classes; simulation software is introduced into bidirectional coupling of a temperature field and a fluid field, and a certain theoretical basis is provided for accurately calculating the influence of the electric arc on the oil flow rate in the switching process of the on-load tap-changer and practically improving the reliability of non-electric quantity protection actions.
Owner:ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
Tap switch state evaluation method based on electric arc electromagnetic radiation signal
PendingCN114019252AReduce false alarm rateQuick responseElectromagentic field characteristicsEngineeringComputational physics
The invention discloses a tap switch state evaluation method based on an electric arc electromagnetic radiation signal. According to the method, energy information in a plurality of frequency bands is obtained through the sub-frequency band energy measurement of the electromagnetic radiation signal of an on-load tap switch; with an adaptive arc signal threshold determination method adopted, the electric arc signal energy threshold value of the on-load tap tap switch and the electromagnetic radiation frequency distribution characteristic of an electric arc can be obtained; an electric arc generation position and an electric arc arcing intensity are determined; the electric arc arcing duration and the energy range during each time of electric arc arcing are determined; the operation state of the on-load tap switch is evaluated; and whether an arc fault occurs or not is judged by using an adaptive on-load tap switch state judgment method, and the influence of the arc fault on the on-load tap switch is evaluated. According to the method, the electromagnetic radiation signal is adopted, the response speed can be increased, and the false alarm rate of the arc is effectively reduced through the adaptive arc signal threshold determination method and the adaptive on-load tap switch state judgment method.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO ELECTRIC POWER RES INST +2
Ignition device for engine
InactiveCN101699057ABurn fullyElectric ignition installationMachines/enginesEngine efficiencyCylinder head
The invention provides an ignition device for an engine. The device adopts a piston and a cylinder cover which are provided with needle electrodes at the same time, wherein two kinds of electrodes are correspondingly arranged, and ignition is carried out when the distance is shortest, and long arc duration ignition is maintained by utilizing high voltage arc ionized air in a process that the piston moves far away from the cylinder cover to ensure that combustible gas can be sufficiently burnt and achieve the effect of comprehensively improving the efficiency and emission of the engine. To ensure stable arc, the electrodes adopt a multi-needle structure.
Owner:北京奈特通达科技发展有限责任公司
Intelligent arc extinguishing and overvoltage protection system
InactiveCN107294079AWon't burn outReduced insulation performanceEmergency protective arrangements for limiting excess voltage/currentOvervoltageElectric power system
The invention discloses an intelligent arc suppression and overvoltage protection system, which includes a power grid, an isolation switch module, a voltage mutual induction module, a control module, a vacuum circuit breaker module, a vacuum contact module, a voltage detection drive module, a control switch module, and a rectification and voltage stabilization module , infrared detection module and alarm module. Beneficial effects: the present invention can be used to detect the voltage of the power grid by setting the voltage detection drive module 7, and protect the power system from being burned by high voltage through the setting of the MOS tube. When a single-phase intermittent arc ground fault occurs, the control The device 4 sends an action command to the vacuum circuit breaker module 5 capable of single-phase operation, transforms the unstable arc grounding into a stable metal grounding, limits the overvoltage caused by the arcing grounding to the online voltage level, and greatly reduces the single-phase grounding arc. Time and the resulting insulation breakdown short circuit accident and arrester explosion accident.
Owner:HEFEI DONGJIU ELECTRICAL CO LTD
Chip fuse and manufacturing method of chip fuse
ActiveCN104813433BAvoid destructionEnough film thicknessFuse device manufactureHeating/cooling contact switchesTectorial membraneEngineering
The present invention provides a chip fuse and a method of manufacturing the chip fuse, and aims at improving the breaking performance such as maintaining the appearance and reducing the continuous arc. In the chip fuse (21), a heat storage layer (23) is formed on an insulating substrate (22), and surface electrode portions (24a) on both sides in the longitudinal direction of the chip fuse are formed on the heat storage layer. ) and the fuse element part (24b) between the above-mentioned surface electrode parts, and a protective film is formed on the fuse element part, wherein, on the heat storage layer in a manner surrounding the fuse element part A rectangular bank (27) is formed on the surface electrode portion, and a first protective film (28) is formed inside the bank. In addition, in the bank forming process, by affixing a sheet-shaped photosensitive group-containing material on the fuse element portion, the surface electrode portion, and the heat storage layer, and attaching the sheet-shaped photosensitive group-containing material Rectangular banks are formed by ultraviolet exposure and development (photolithography).
Owner:KAMAYA ELECTRIC
Gunfire simulator
The invention is suitable for the technical field of electronic engineering, and provides a gunfire simulator. The gunfire simulator comprises a firing electrode set, a discharging electrode set, a firing circuit and an energy storage circuit, wherein the firing electrode set is located on the inner side of the discharging electrode set, the height of the firing electrode set is lower than that of the discharging electrode set, and the firing circuit comprises a high-voltage generation circuit and an arc duration circuit; and a first connection point of the high-voltage generation circuit is connected with a positive electrode of the firing electrode set and a first connection point of the arc duration circuit, a second connection point of the high-voltage generation circuit is connected with a negative electrode of the firing electrode set and a second connection point of the arc duration circuit, a third connection point of the arc duration circuit is connected with a first connection point of the energy storage circuit, a fourth connection point of the arc duration circuit is connected with a second connection point of the energy storage circuit, a third connection point of the energy storage circuit is connected with a positive electrode of the discharging electrode set, and a fourth connection point of the energy storage circuit is connected with a negative electrode of the discharging electrode set. The gunfire simulator is small in size, light in weight and convenient to carry, and the problems that simulated gunfire in existing shooting training is low in sound level and distorted in sound quality are solved.
Owner:王龙
Pantograph catenary arcing measurement sensor calibration device and calibration method
ActiveCN113552523AConsider the impactEasy to fixElectrical measurementsTraction power supplyLight transmission
The invention belongs to the technical field of traction power supply system detection and monitoring and discloses a pantograph catenary arcing measurement sensor calibration device. The device comprises a measurement module and an arcing module, simulates actual data such as guide height and pull-out value through an adjusting structure, limits a working distance between a sensor to be calibrated and a light source for simulating arcing, three-way adjustment of the to-be-calibrated pantograph catenary arcing sensor is realized based on an adjustment platform structure, and different light source light transmission frequencies are adjusted through a rotating plate provided with light transmission holes, so pantograph catenary arcing duration, pantograph catenary arcing times and pantograph catenary arcing interval time measured by the pantograph catenary arcing sensor are calibrated in a mode closest to a use environment. The calibration device can calibrate multiple types of arcing sensors at the same time, and the influence of environmental interference light on the arcing sensors is considered at the same time. The invention further discloses a calibration method based on the calibration device for the pantograph catenary arcing measurement sensor.
Owner:SOUTHWEST JIAOTONG UNIV +1
Welding control method, welding machine control device and welding machine
ActiveCN111037055AStable voltageImprove welding qualityWelding accessoriesControl engineeringProcess engineering
The invention provides a welding control method, a welding machine control device and a welding machine. The welding control method comprises the steps that after a welding pulse is output, whether ashort circuit occurs in a current pulse period or not is detected; when the short circuit is detected, a short circuit duration and an arcing duration are obtained; a filtering voltage calculation method is determined according to the ratio of the short-circuit duration to the arcing duration; and the filtering voltage of the welding pulse is calculated in real time according to the calculation method, and when the filtering voltage reaches the preset voltage, next welding pulse is output. According to the embodiment of the invention, the problems of unstable arc and inconsistent arc length caused by short circuit in the welding process can be avoided.
Owner:PANASONIC WELDING SYST TANGSHAN
Gun Sound Simulator
Owner:王龙
Low-voltage circuit breaker
InactiveCN102623270BImprove breaking capacityShort durationCircuit-breaking switch detailsLow voltage circuitsSecondary electrons
The invention relates to a low-voltage circuit breaker. The technical problem of long arc duration caused by the secondary electron emission of the conventional low-voltage circuit breaker is solved. The low-voltage circuit breaker comprises a shell, an arc extinguish chamber, a moving contact terminal and a fixed contact terminal, wherein the arc extinguish chamber, the fixed contact terminal and the moving contact terminal are arranged in the shell. The low-voltage circuit breaker is characterized by also comprising a contact terminal cover, wherein the contact terminal cover mainly comprising a base part and a gas production part connected with the base part; at least the gas production part is made from a gas production material; the gas production part is opposite to a spacing between the moving contact terminal and the fixed contact terminal; when the gas production part produces a gas, an arc enters the arc extinguish chamber; and moreover, the gas production part faces a moving contact on the moving contact terminal.
Owner:ZHEJIANG TENGEN ELECTRIC
Thermal stability principle-based intermittent grounding protection method for small-resistance grounding system
PendingCN113346463AEffective handling of intermittent ground faultsObjective settingEmergency protective circuit arrangementsElectrical resistance and conductanceGround failure
The invention provides a thermal stability principle-based intermittent grounding protection method for a small-resistance grounding system and aims to solve the problem that the single arcing duration of an intermittent grounding fault is often smaller than a protection action time limit, and the problem that traditional grounding fault protection is difficult to process, and other problems,so as to effectively remove intermittent grounding faults. According to the technical schemes, zero-sequence current is used for constructing heating characteristic values of all outgoing lines in a fault arcing period, heat difference is used for constructing heat dissipation characteristic values after arc extinguishing, protection action is conducted after the heating characteristic values exceed the limit, and intermittent grounding faults are removed. The method provided by the invention can be used as backup protection for outgoing line protection of the existing small-resistance grounding system, and improve the operation and power supply reliability of the system.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
Current-based method and apparatus for detecting and classifying arcing
An apparatus and technique for generating plasma using a power supply circuit and an arc detection device are provided. A power circuit has a cathode enclosed in a chamber and is adapted to generate power related parameters. The arc detection arrangement is communicatively coupled to the power supply circuit and adapted to estimate the severity of arcing in the chamber by comparing the power related parameter to less than a threshold value. According to various implementations, arc occurrence, arc duration, severity, and / or energy are measured in response to a comparison of the power-related parameter to less than a threshold value. According to another implementation, the above-mentioned measured quantities are accumulated and / or further processed. Apparatus and methods for detecting arcing when a current spike is above a threshold level are also provided. The method and apparatus are also used to classify arcing events based on the voltage and current signals and the duration that each signal exceeds a threshold.
Owner:SCHNEIDER ELECTRIC USA INC
Vacuum arc-extinguishing chamber
InactiveCN105609363AEnsure safetyGuaranteed arc durationHigh-tension/heavy-dress switchesAir-break switchesGround contactEngineering
The invention provides a quick arc-extinguishing device for extinguishing an arc of a high-voltage switch cabinet. The quick arc-extinguishing device structurally comprises a fixed contact 2, an arc-extinguishing chamber ceramic shell 3, a moving contact 4, a grounding contact 5, a watchband contact finger 6 and a miniature gas generator 7, wherein the fixed contact 2 is located at the upper part of the arc-extinguishing chamber ceramic shell 3; the grounding contact 5 is located at the lower part of the arc-extinguishing chamber ceramic shell 3 and is grounded; the watchband contact finger 6 is arranged in a groove of the moving contact 4; the moving contact 4 is arranged in a hole in the grounding contact 5; and the miniature gas generator 7 is arranged at the bottom part of the grounding touch 5. The quick arc-extinguishing device has the advantage that a main loop of the switch cabinet is grounded; and a switch cabinet protecting device sends out a circuit breaker breaking command of the cabinet, so that the switch cabinet is powered off. The time from the moment when an arc probe sends out a signal to the moment when an electronic detection device receives the signal is about 2ms; the time from the moment when the electronic detection device sends out the signal to the moment when the quick arc-extinguishing device extinguishes an arc light is about 2ms; and the condition that the arc duration is about 4ms is ensured, so that the arc energy is reduced and the safety of switch cabinet equipment is ensured.
Owner:XINYANG NORMAL UNIVERSITY
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