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30 results about "Arc duration" patented technology

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

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

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

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

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

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

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

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

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

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

Gun Sound 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

Vacuum arc-extinguishing chamber

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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