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41results about How to "Large flow capacity" patented technology
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10/350 shock current system for air or vacuum crowbar switch
InactiveCN1767335ABig trigger energyGuaranteed reliabilityApparatus without intermediate ac conversionCircuit interrupters testingCapacitanceElectricity
The invention relates to a 10 / 350 impact current system of an air or vacuum CROWBAR switch, which comprises a capacity resistance connected with the power, a main discharging gap, an inductance and a resistance, wherein it coupled with a CROWBAR switch between the main discharging electrode and the capacity discharging circuit of the inductance; the CROWBAR switch comprises an active electrode and a fixed electrode or it fixes fabrics a trigger electrode in the fixed electrode or the discharging gap between the active electrode and the fixed electrode; it electric connects a trigger system between the active electrode and the fixed electrode or between the fixed electrode and the trigger electrode.
Owner:XI AN JIAOTONG UNIV
Hot-melt type cable middle connection mounting technology
InactiveCN109616962AConsistent Electrical StabilityNo air gap interfaceApparatus for repairing insulation/armouring cablesApparatus for joining/termination cablesInsulation layerElectrical conductor
The invention discloses a hot-melt type cable middle connection mounting technology, and belongs to the field of cable middle connection structures; the method comprises the following steps of S1, performing preprocessing on a cable; S2, performing connecting on conductors; S3, carrying out recovering of a cable insulating layer: a, enabling a recovery conductor formed in S2 to be wrapped with aninner semi-conductive band; b, enabling an insulating repairing layer to wrap the outside of the inner semi-conductive band, wherein the material of the insulating repairing layer is a cross-linked polyethylene insulating band; and c, moving a cold-shrinkable sleeve for wrapping the insulating repairing layer, and performing heating on the insulating repairing layer to be fused, wherein the fusedinsulating repairing layer is cooled and then is integrally formed with an insulating layer of a cable main body, and a new recovery insulation layer is formed; S4, enabling the cold-shrinkable sleeveto be stripped, and performing grinding on the recovery insulation layer; and S5, carrying out recovering of an outer shielding layer of the cable. The method has the advantages that the melting process and the process of repairing and continuous connection of the cross-linked polyethylene material can be simplified, and meanwhile, other large equipment or special auxiliary tools are not needed,so that the effects of improving the construction efficiency and saving the construction cost are achieved.
Owner:吴江市华鼎热缩制品有限公司
High tensile explosion-proof lightning protection insulator and explosion-proof lightning arrester
InactiveCN101656131APreventing Ice DisastersPrevention of Lightning Accident DisastersSpark gap detailsInsulatorsElectricityDislocation
The invention discloses a high tensile insulator with the functions of explosion-proof and lightning protection and a lightning arrester with the function of explosion-proof in the electrical equipment field. The high tensile explosion-proof lightning protection insulator comprises an explosion-proof lightning protection device body containing cell-combination in series with effective large planedischarging gap valve box, where large current can be distributed evenly and can discharge under constant pressure and the inner periphery of the cavity opening is provided with a bulb and an iron capwhich lie in a rabbet platform, a trough type hoop, a joint foot pole of the base of a hollow round platform and a tensile reinforcement combination used for preventing the dislocation caused by drawing. The explosion-proof lightning arrester of the invention comprises an explosion-proof lightning device body containing cell-combination in series with effective large plane discharging gap valve box, where large current can be distributed evenly and can discharge under constant pressure and a fixed shelving combination. The beneficial effect of the invention is that the high tensile explosion-proof lightning protection insulator and the explosion-proof lightning arrester can bear large surging, has low residual voltage and low energy loss, can resist electric sleet disaster and is safe andreliable.
Owner:唐圣严
Combined lightning arrester based on disc-shaped multi-gap arc extinguishing and lightning protection device
ActiveCN109217112ASimple structureImprove reliabilitySpark gap detailsWind energy generationLightning strikeEngineering
The invention discloses a combined type lightning arrester based on a disc-shaped multi-gap arc extinguishing and lightning protection device, in particular to a lightning arrester applied to overheadlines above 10KV. The structure of the invention is as follows: upper and lower connecting fittings are respectively arranged on the upper and lower parts of the insulating support rod, the upper spherical electrode is connected with the upper connecting fittings, the lower spherical electrode is connected with the lower connecting fittings, a first, second,.. N-th disk-shaped multi-gap arc extinguishing lightning protection device is serially connected between the upper connecting fittings and the lower connecting fittings, N is a natural number, 1 <= N <= 8. The lightning current is elongated, elongated and ejected to extinguish the electric arc, thereby avoiding the occurrence of inter-phase short circuit fault and reducing the counterattack probability caused by lightning strike lightning protection wire; and the lightning current is elongated, elongated and ejected. Strong ability to withstand lightning surge, large flow capacity, high security; Good consistency of discharge gapsize; Simple structure; The special multi-gap arc will not be reignited because of the rapid recovery of dielectric insulation after the power frequency continues to flow through the zero-extinguishing arc.
Owner:WUHAN WEICHUANGYUAN ELECTRONICS TECH CO LTD
Surge protective method by self-control surge current triggered gap discharge
InactiveCN1457126AAvoid destructionShort response timeEmergency protective arrangements for limiting excess voltage/currentOvervoltageElectric discharge
The method consists of the assistant discharging circuit containing a group of trigger electrodes setup between protected circuits or devices and a ground electrode and the main discharging circuit containing a main discharging gap. The characters of the invention are that the distance setting between the trigger electrode and the main discharging gap is based on following consideration. The assistant discharging circuit containing trigger electrodes sets the overvoltage threshold. When voltage is higher than the threshold, electric surge current flows through the trigger pole to the ground electrode. The current passing through the trigger pole sets the current threshold. When current is larger than the current threshold, electric arc is generated and electric discharge happens in main discharging gap.
Owner:黄兴英
Coaxial channel lightning protection device circuit
InactiveCN102646974AFree from damageLarge flow capacityEmergency protective arrangements for limiting excess voltage/currentOvervoltageElectrical resistance and conductance
The invention relates to a coaxial channel lightning protection device circuit, which comprises a gas discharge tube I, a transient voltage suppressor diode (also called TVS diode) II, a coupling resistor R and a fast recovery diode D; the gas discharge tube I is connected with the transient voltage suppressor diode II through the coupling resistor R. Compared with the prior art, the circuit provided by the invention has the advantages of large through-flow capacity (5KA), fast response speed (nano-second level), small volume, convenience in installation and the like; as a multi-level protection circuit is adopted, the residual voltage is low; and moreover, the circuit is suitable for overvoltage protection of related devices which transmit videos and data signals through a coaxial cable, and can protect the device from being damaged by sensing the overvoltage and operating the overvoltage.
Owner:SHANGHAI SUM SPD TECH
Protector for preventing interception over-voltage and arc reignition over-voltage of vacuum circuit breaker
ActiveCN101661850ALow residual pressureLarge flow capacitySwitch operated by excess voltageHigh-tension/heavy-dress switchesElectrical resistance and conductanceVacuum interrupter
The invention relates to a conversion current and over-voltage protection technology of electric equipment, in particular to a protector for preventing interception over-voltage and arc reignition over-voltage of a vacuum circuit breaker. A valve body of the protector is assembled by mutual series-parallel connection of a column-type valve plate RN1 of a ZnO non-linear resistor, a ring-type valveplate RN2of a Sic non-linear resistor, and a column-type valve plate RN3 of a ZnO non-linear resistor ; then output ends are connected to both ends of DL movable and stationary main contacts in parallel. The vacuum circuit breaker has the ability of converting current and limiting voltage when the large current is switched on and off, and the function of preventing the interception over-voltage and the arc reignition over-voltage when the low current is switched on and off. When the circuit breaker closes the switch, the current flows from both ends of the main contacts and does not flow in the protector, thus the protector can not have the aging problem, a loop can not cause the reignition over-voltage in the process of switching on and off, thereby protecting the main contact against burning or shortening the service life due to the arc reignition.
Owner:CHANGZHOU MECAN ELECTRIC TECH DEV
Disk-shaped multi-gap arc extinguishing and lightning protection device based on double hemisphere T-shaped ceramic discharge tube
ActiveCN109273988ASimple structureImprove reliabilitySpark gap detailsWind energy generationDielectricLightning strike
The invention discloses a disk-shaped multi-gap arc extinguishing lightning protection device based on a double-hemisphere T-shaped ceramic discharge tube, which relates to a lightning arrester applied to overhead lines above 10KV level. The structure of the device is as follows: 6 Ten double-hemisphere T-shaped ceramic discharge tubes are connected in series to form a series of arc-extinguishinggaps, which are arc-shaped in small segments. By 6 8 arc-extinguishing gap strings and 5 Seven outer-gap spherical electrodes are staggered in series to form a large-arc gap string, and the upper spherical electrode and the lower spherical electrode of the main gap spherical electrode are respectively connected at the ends of the large-arc gap string. The lightning current is elongated, elongated and ejected to extinguish the electric arc and reduce the counterstrike probability caused by lightning strike lightning wire. Strong ability to withstand lightning surge, large flow capacity, highsecurity; Discharge gap size consistency is good, impulse discharge, power frequency discharge is stable; The utility model has the advantages of simple structure, multiple external gaps arranged atthe same time, and the recovery speed of the dielectric insulation can be greatly improved after the lightning stroke of the device, and the dielectric insulation is not reignited after the arc is extinguished.
Owner:WUHAN WEICHUANGYUAN ELECTRONICS TECH CO LTD
Protection device having functions of automatic control, energy moving and degradation self-separation for vacuum arc extinguish chamber
InactiveCN102254735ALarge flow capacitySolve the problem that it is difficult to effectively protect electrical equipmentHigh-tension/heavy-dress switchesAir-break switchesOvervoltageAutomatic control
The invention relates to a protection device having functions of automatic control, energy moving and degradation self-separation for a vacuum arc extinguish chamber. The protection device comprises an automatic degradation off-line device TQ and an energy-moving component R1 which are arranged in series; the two ends of the energy-moving component R1 are connected with a resistor-capacitor (R-C) loop in parallel; a resistor R and a capacitor C in the R-C loop are connected in series; the automatic degradation off-line device TQ comprises a shell; a fuse is arranged in the shell; quartz sand is filled in the shell; a cavity is formed in the middle of the upper part of the shell; a post-degradation off-line indicator and a pre-compaction spring are arranged in the cavity and sealed in the cavity; the lower end of the fuse is connected with a second electrode; the upper end of the fuse passes through the pre-compaction spring and then is connected with the post-degradation off-line indicator; the upper part of the shell is provided with a first electrode; and a lead line of the first electrode is buried in the quartz sand. By the protection device, the reignition rate of a vacuum breaker can be reduced, and the reignition overvoltage, the shut-off overvoltage and the overvoltage during simultaneous cut-off of three phases can be reduced, so that the arc extinguish chamber of the vacuum breaker can be protected, and other electrical equipment can be also protected.
Owner:HEFEI KAIGAO ELECTRICAL EQUIP
Gas discharge tube with trigger electrodes
InactiveCN104377551AShort response timeReduce action delaySpark gaps with auxillary triggeringOvervoltage arrestors using spark gapsResponse delayEngineering
The invention discloses a gas discharge tube with trigger electrodes. The gas discharge tube comprises two main discharge electrodes, the n trigger electrodes and n+1 ceramic tubes, wherein n is larger than or equal to one, the two main discharge electrodes are arranged at the two ends of the gas discharge tube, the n trigger electrodes are sequentially arranged between the two main discharge electrodes, every two adjacent electrodes are connected through the corresponding ceramic tube, and the ceramic tubes are filled with inert gas. By means of the gas discharge tube, the problems of the long response delay and the large follow current of an existing gas discharge tube are solved, and the lightning protection effect is improved.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Rod-shaped multi-gap arc extinguishing and lightning protection device based on double hemisphere T-shaped ceramic discharge tube
PendingCN109273987ASimple structureImprove reliabilitySpark gap detailsOvervoltage arrestors using spark gapsInsulation layerLightning strike
The invention discloses a rod-shaped multi-gap arc extinguishing lightning protection device based on a double-hemisphere T-shaped ceramic discharge tube, which relates to an arc extinguishing lightning protection device applied to overhead lines above 10KV level. The invention comprises a spherical electrode, an insulating umbrella tray, an internal insulating layer, a double-hemisphere T-shapedceramic discharge tube and a bolt electrode. 30 to 40 double hemisphere T-shape ceramic discharge tubes and bolt electrode are sequentially connected to form a rod-type integral body; An internal insulation layer is uniformly wrapped on the whole rod type, and an insulation umbrella tray is arranged on the external insulation layer of the internal insulation layer. The lightning current is elongated, elongated and ejected to extinguish the electric arc, thereby avoiding the occurrence of inter-phase short circuit fault and reducing the counterattack probability caused by lightning strike lightning protection wire; and the lightning current is elongated, elongated and ejected. Strong ability to withstand lightning surge, large flow capacity, high security; Discharge gap size consistency isgood, impulse discharge, power frequency discharge is stable; The utility model has the advantages of simple structure, high reliability and easy mass production.
Owner:WUHAN WEICHUANGYUAN ELECTRONICS TECH CO LTD
An overvoltage damping device of interstice
InactiveCN101217235AGood arcing effectLarge flow capacityEmergency protective arrangements for limiting excess voltage/currentOvervoltageEngineering
The invention relates to a clearance overvoltage damping device, including an insulation cylinder, the interior of which is fixedly provided with a non-inductance resistor and a gas discharge tube, the non-inductance resistor is connected with the gas discharge tube in series, and terminal blocks are arranged on the insulation cylinder. The overvoltage which is caused by the transition process when throwing and cutting a capacitor group can be inhibited effectively, the invention can prevent the occurrence of the accidents of a capacitor, a discharge coil, a circuit breaker and other equipments, ensures the safe power supply and has obvious damping effect for the transition process which is caused by switching-on and re-ignition, the protection capability is strong and the service life is long.
Owner:凌海科诚电气有限责任公司
Multi-stage series gap arrester for lightning protection of power electronic devices
ActiveCN108808644AEasy structure selectionEasy insulation coordinationEmergency protective arrangements for limiting excess voltage/currentEngineeringInductor
The invention discloses a multi-stage series gap arrester for lightning protection of power electronic devices. The multi-stage series gap arrester for lightning protection of power electronic devicescomprises a high-voltage end, a ground end, N+1 zinc oxide arresters (ZnO), N series connection partial voltage inductors, N-1 loop partial voltage inductors and N equal-distance discharge gaps; thezinc oxide arresters, the series connection partial voltage inductors, the loop partial voltage inductors and the equal-distance discharge gaps form a first-stage discharge gap loop to an N-stage discharge gap loop, which are connected in series. The multi-stage series gap arrester is capable of withstanding relatively high direct current operating voltage, and has the characteristics of low residual voltage, long service life and high operational reliability.
Owner:XI AN JIAOTONG UNIV
Beidou 3G/4G video lightning protection terminal based on high-resolution satellite receiving technology
PendingCN107247283AImprove efficiencyEnsure stabilityGHz frequency transmissionNavigation by terrestrial meansSatellite technologyImaging processing
The invention relates to a satellite technology, in particular to a Beidou 3G / 4G video lightning protection terminal based on a high-resolution satellite receiving technology. The Beidou 3G / 4G video lightning protection terminal is composed of an ARM processor, and a power management module, a speed sensor module, a high-resolution satellite receiving module, a telephone module, an expansion module, a lightning protection module, a 3G / 4G communication module, a geomagnetic / BeiDou positioning module and an image processing module which are all connected with the ARM processor. The Beidou 3G / 4G video lightning protection terminal has the characteristics of high accuracy of indoor positioning, long signal receiving distance, and good lightning protection performance.
Owner:THE LOUDI JINXIN ELECTRONICS TECH CO LTD
Electromagnetic pulse protection method for aircraft communication navigation system
InactiveCN107658859AMeet Response Time RequirementsLarge flow capacityEmergency protective arrangements for limiting excess voltage/currentTransceiverEngineering
An electromagnetic pulse protection method for an aircraft communication and navigation system, which includes an antenna and a transceiver, and a suppressor is connected in series between the antenna and the transceiver, and the suppressor is an independent structure that encapsulates suppression components. The suppressor is provided with a mounting base and two connecting plugs, one of which is a pin plug for connecting with an antenna, and the other connecting plug is a female plug for connecting with a transceiver.
Owner:XIAN AIRCRAFT IND GROUP
Surge protection device of end-span method active Ethernet
ActiveCN104377677ALarge flow capacitySimple structureEmergency protective arrangements for limiting excess voltage/currentEngineeringTransient voltage suppressor
The invention discloses a surge protection device of an end-span method active Ethernet. An end-span method is adopted in the active Ethernet, and the active Ethernet comprises a network signal protection unit, an RJ45 input interface and an RJ45 output interface. The network signal protection unit comprises a first triode gas discharge tube, a second triode gas discharge tube, a first rectifier bridge, a second rectifier bridge, a first transient voltage suppressor, a second transient voltage suppressor, a first bidirectional transient voltage suppressor and a second bidirectional transient voltage suppressor. The surge protection device of the end-span method active Ethernet can be used for restraining lightning overvoltage formed by lightning electrostatic induction and electromagnetic induction for the active Ethernet with an intermediate span method adopted, lightning current energy is released to the ground, and it is ensured that the active Ethernet runs normally.
Owner:江苏煌恒通信设备制造有限公司
Zinc oxide semiconductor ceramic chip for lightning protection and preparation method for zinc oxide semiconductor ceramic chip
The invention discloses a zinc oxide semiconductor ceramic chip for lightning protection. The ceramic chip comprises 15mol% of ZnO (zinc oxide), 2.5mol% of Bi2O3 (bismuth oxide), 5mol% of Sb2O3 (antimony trioxide), 2.5mol% of Co2O3 (cobalt oxide), 2.5mol% of MnO2 (manganese dioxide) and 2.5mol% of Cr2O3 (chromium oxide). Meanwhile, the invention further discloses a preparation method for the zinc oxide semiconductor ceramic chip for the lightning protection. The zinc oxide semiconductor ceramic chip prepared by the preparation method disclosed by the invention has the advantages of being small in leaked electric current, high in degradation resistant capacity, good in impact resistance, small in size, convenient to mount and the like, and a plurality of zinc oxide semiconductor ceramic chips can be connected in parallel for use, so that the discharge current capacity is improved.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Connect-disconnect module and substrate for electrophoresis protector
InactiveCN100517901CSmall deviation of melting pointLarge flow capacityTwo-part coupling devicesEmergency protective arrangements for limiting excess voltage/currentElectrophoresisEngineering
A pluggable module of a surge protector, including a shell, a plug, a rheostat, an overheating protector, an indicator and a spring, is characterized in that the shell includes a bottom cover, an intermediate body and a top cover; the bottom surface of the bottom cover is a plane, The front is open, and the top cover covers the front opening of the bottom cover to form a single-unit pluggable module; the front of the intermediate body is open, and the bottom surface can be fixed on the top of the bottom cover or on another intermediate body, and the top cover Cover the front opening of the intermediate body to form a pluggable module of multiple units. A base of a surge protector, including a shell, a clamp, a spring, a terminal block, a terminal block, screws, a terminal and a micro switch. The shell has a "U"-shaped opening whose size is the same as that of a pluggable module. Same size, also includes sockets, that match the plugs of the pluggable modules. A pluggable module into which a single unit or multiple units can be inserted.
Owner:SEARI ELECTRIC TECH
Surge protection device of mid-span active Ethernet
InactiveCN104362604ALarge flow capacitySimple structureEmergency protective arrangements for limiting excess voltage/currentEngineeringTransient voltage suppressor
The invention discloses a surge protection device of mid-span active Ethernet. The active Ethernet adopts mid-span, the surge protection device comprises a network signal protection unit, a power supply unit, an RJ45 input interface and an RJ45 output interface, the network signal protection unit comprises a first tripolar gas discharge tube, a second tripolar gas discharge tube, a first resistor, a second resistor, a third resistor, a fourth resistor, a firs directional transient voltage suppressor and a second directional transient voltage suppressor, and the power supply unit comprises a first piezoresistor, a second piezoresistor, a third piezoresistor, a first inductor, a second inductor and a temperature fuse. The mid-span active Ethernet can suppress lightning overvoltage formed by electrostatic induction of lightning and electromagnetic induction, lightning current energy is released, and normal operation of the active Ethernet is ensured.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
High-capacity overvoltage limiter core
InactiveCN104599799AGuaranteed uptimeLarge flow capacityOvervoltage protection resistorsOvervoltageLow voltage
The invention provides a high-capacity overvoltage limiter core. The limiter core is formed by serially laminating parallel elements, wherein the parallel elements are respectively provided with a high voltage end and a low voltage end; each parallel element consists of a plurality of resistor sheets which are laminated in series, and the plurality of resistor sheets are electrically connected in parallel by virtue of a conducting wire I and a conducting wire II; the parallel elements are divided into parallel elements of an odd number and parallel elements of an even number, the resistor sheets in the parallel elements are divided into parallel resistor posts of an odd number and parallel resistor posts of an even number by virtue of the different distribution of the connecting conducting wire I, an insulation pad and the connecting conducting wire II, and the overvoltage limiter core of different voltage grades can be formed by serially laminating a plurality of parallel elements; while the discharge current capacity of the overvoltage limiter core is increased, the structure is compacter, the floor occupation area of the device can be reduced, a limiter is safe and reliable to operate, an electrical appliance of a power system can be prevented from suffering from the damage of the overvoltage, the development requirement of the power system can be met, and the safety operation of the power system can be guaranteed.
Owner:CHINA XD ELECTRIC CO LTD
10/350 shock current system for air or vacuum CROWBAR switch
InactiveCN100454734CBig trigger energyLarge flow capacityApparatus without intermediate ac conversionCircuit interrupters testingCapacitanceElectricity
Owner:XI AN JIAOTONG UNIV
SnO2 piezoresistor with high nonlinearity, low residual voltage and large discharge current capacity for power transmission of power system, and preparation method thereof
ActiveCN110668808AImprove the ability to discharge amplified currentHigh nonlinear coefficientResistor manufactureVaristor coresVaristorPower transmission
The invention discloses a SnO2 piezoresistor with high nonlinearity, low residual voltage and large discharge current capacity for power transmission of a power system, and a preparation method thereof. The piezoresistor comprises SnO2, Co3O4, Cr2O3, Ni2O3, Sb2O5 and Ta2O5. The preparation method comprises a main slurry preparation step, an auxiliary slurry preparation step, a mixing step, a forming step, a glue discharging step and a sintering step which are carried out in sequence. The SnO2 piezoresistor has the following advantages: the capability of the SnO2 piezoresistor for discharging and amplifying current is improved, so the purpose of enhancing the nonlinear coefficient and the discharge current capacity of the SnO2 piezoresistor is achieved; and the residual voltage ratio is inhibited at the lowest level, and the SnO2 piezoresistor has a better effect and a higher aging stability than a Ta or Sb element monodoped piezoresistor.
Owner:XINJIANG UNIVERSITY
Resistor disc for manufacturing piezoresistor with high discharge current capacity
InactiveCN108358625ALarge flow capacityImprove flow capacityResistor chip manufactureVaristor coresStrontium titanateLithium oxide
The invention belongs to the technical field of electronic components and particularly relates to a resistor disc for manufacturing a piezoresistor with high discharge current capacity. A ceramic chipof the resistor disc and a conductive electrode connected with the ceramic chip are covered with a protective layer; the ceramic chip is prepared from zinc oxide, bismuth oxide, antimonous oxide, manganese dioxide, cobaltic oxide, cobalt dioxide, niobium pentoxide, lanthanum oxide, strontium titanate, a nano additive and the like; the nano additive contains titanium oxide, lithium oxide, nickel oxide and other components; the protective layer is prepared from a binding material and bismuth glass powder and applied to the outermost layer of the resistor disc in a printed manner. Under the samesize, the piezoresistor produced from the resistor disc can bear higher surge current and is higher in discharge current capacity and lower in production cost.
Owner:HEFEI DAZHUO ELECTRIC POWER CO LTD
A gas discharge tube for coaxial cables
ActiveCN106252180BLarge flow capacityExcellent protection voltageThermionic-cathode tubesOvervoltageCoaxial cable
Owner:CHINA PETROLEUM & CHEM CORP +1
Novel gas discharge tube for coaxial cables
ActiveCN106252180AHigh transmission frequency bandwidthReduce lossThermionic-cathode tubesOvervoltageCoaxial cable
The invention provides a novel gas discharge tube for coaxial cables, and belongs to the technical field of lightning protection overvoltage. The novel gas discharge tube comprises a cylindrical cavity, wherein the cavity comprises a cavity wall and plugs at the upper end and the lower end; an inert gas is arranged in the cavity; the cavity is connected to the coaxial cables in series through a metal shell; two ends of the metal shell are connected to the coaxial cables at two ends through connectors respectively; an electrode is arranged in the cavity in a radial manner; two ends of the electrode pass through the upper plug and the lower plug respectively to be connected with wire cores of the coaxial cables at two ends; the cavity wall is an electric conductor; the metal shell is connected with a grounding plate; the cavity wall, the metal shell and the grounding plate form a ground terminal; and the upper plug and the lower plug are made of insulating materials. The novel gas discharge tube has the beneficial effects that the gas discharge tube can be connected to coaxial transmission cables in series and the characteristics of a higher transmission frequency bandwidth, a lower loss, high lightning discharge capacity, more excellent protection voltage, safety and reliability can be achieved.
Owner:CHINA PETROLEUM & CHEM CORP +1
Plate gap surge arrester based on superposition of short-arc drop and near-cathode effect
ActiveCN107240859BOvercome failureReduce arc building rateOvervoltage arrestors using spark gapsVulcanizationLightning strike
The invention relates to a flat plate gap arrester based on superposition of short-arc drop and near-cathode effect, including an insulating mandrel, several flat plate discharge electrodes axially threaded on the insulating mandrel, a fixing seat installed at the low-voltage end of the insulating mandrel, an insert The low-voltage electrode in the fixing seat and the main gap discharge electrode arranged at the high-voltage end of the insulating mandrel, and the silicone rubber vulcanization process used to fix the insulating mandrel, a plurality of the flat discharge electrodes, the fixing seat and The silicone rubber outer sheath of the main gap discharge electrode, wherein, several of the flat plate discharge electrodes are arranged uniformly and in parallel. Zinc oxide-free resistors, green and environmentally friendly, overcome the failure of zinc oxide resistors and the defects of moisture; the arc extinguishing mechanism is composed of three parts: near-cathode effect superposition, near-pole voltage drop superposition, and chamber blowing arc, which can effectively reduce overhead lines due to The arc establishment rate caused by lightning strikes can effectively reduce the line lightning tripping rate under extreme working conditions such as heavy minefields and harsh wet environments.
Owner:武汉水院电气有限责任公司
Sno with high nonlinearity, low residual voltage and large current capacity for power system transmission 2 The preparation method of varistor
ActiveCN110668808BAdd nonlinearityLow residual pressureResistor manufactureVaristor coresElectric power systemSlurry
A kind of SnO with high nonlinearity, low residual voltage and large current capacity for power system transmission 2 The preparation method of the varistor, the composition of the varistor includes SnO 2 , Co 3 O 4 , Cr 2 O 3 , Ni 2 O 3 , Sb 2 O 5 , Ta 2 O 5 , whose preparation steps include SnO 2 The main slurry preparation steps, Co 3 O 4 , Cr 2 O 3 , Ni 2 O 3 , Sb 2 O 5 , Ta 2 O 5 The auxiliary slurry preparation step, the main slurry, the mixing step of the auxiliary slurry, the molding step, the degumming step, and the sintering step, the SnO 2 The main slurry preparation steps, Co 3 O 4 , Cr 2 O 3 , Ni 2 O 3 , Sb 2 O 5 , Ta 2 O 5 The auxiliary slurry preparation step, the main slurry, the mixing step of the auxiliary slurry, the molding step, the degumming step, and the sintering step are performed in sequence. Its beneficial effects are: increased SnO 2 The ability of the varistor to leak large currents achieves the purpose of enhancing its nonlinear coefficient and current capacity; the residual voltage ratio is suppressed to the lowest level, which is better than the results measured by a single doped Ta or Sb element , the aging stability is stronger.
Owner:XINJIANG UNIVERSITY
Surge protective method by self-control surge current triggered gap discharge
InactiveCN1327586CShort response timeConsistent response timeEmergency protective arrangements for limiting excess voltage/currentOvervoltageElectric discharge
The method consists of the assistant discharging circuit containing a group of trigger electrodes setup between protected circuits or devices and a ground electrode and the main discharging circuit containing a main discharging gap. The characters of the invention are that the distance setting between the trigger electrode and the main discharging gap is based on following consideration. The assistant discharging circuit containing trigger electrodes sets the overvoltage threshold. When voltage is higher than the threshold, electric surge current flows through the trigger pole to the ground electrode. The current passing through the trigger pole sets the current threshold. When current is larger than the current threshold, electric arc is generated and electric discharge happens in main discharging gap.
Owner:黄兴英
Low-pressure fusing disconnecting switch
The invention discloses a low-pressure fusing disconnecting switch. The low-pressure fusing disconnecting switch comprises a base (1), a silicon rubber insulator support column (2), a knife switch arranged on the silicon rubber insulator support column (2), a fusing body (10) and a wiring board (11), wherein the knife switch comprises a moving contact (3), a static contact (9), two knife switch plates (4), a pull ring (6) and a pressure spring (13); the side face of the moving contact (3) is provided with a moving contact concave touch surface (17), and / or the side face of the static contact (9) is provided with an annular concave touch surface (18); the contact surface of each knife switch plate (4) and the moving contact (3) is provided with a front-end convex touch surface (16), and the contact surface of the each knife switch plate (4) and the static contact (3) is provided with an annular concave touch surface (15); and the low-pressure fusing disconnecting switch also comprises a flash guard. The low-pressure fusing disconnecting switch provided by the invention has the advantages of simple structure, convenience in use, safety, reliability, low processing cost and large contact area; when the switch is opened and closed, the electric arc can not be generated, thereby prolonging the service life.
Owner:广西和谐电力科技有限公司 +1
Lightning current waveform forming inductor
InactiveCN101425358BEasy to adjustLarge flow capacityTransformers/inductances coils/windings/connectionsVariable inductancesInductorConductor Coil
The invention relates to a lightening current waveform inductance which comprises an insulated barrel as well as an upper electrode and a lower electrode which are arranged on the insulated barrel. An electric inductive coil is wound around the insulated barrel; the outer side of the insulated barrel is respectively provided with two insulated brackets connected with the upper electrode and the lower electrode; a short-circuit rod is arranged on the two insulated brackets, and two moving slide blocks which can move up and down along the short-circuit conductive rod are arranged on the short-circuit conductive rod; and a connecting block corresponding to the moving slide blocks is arranged on each winding of the electric inductive coil of the outer side of the insulated barrel. The connecting block is arranged on each winding of the electric inductive coil, and the short-circuit rod and the moving slide blocks arranged on the insulated brackets on the upper electrode and the lower electrode can be adjusted to enable the lightening current waveform inductance to be conveniently adjusted so as to meet the needs of different test objects such as 10 / 350 mus, 8 / 20 mus lightning current tests, and the like. The invention has the advantages of large discharge current capacity, stable and reliable operation, and the like.
Owner:XI AN JIAOTONG UNIV
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