CN2672665Y - Detector for thunder and lighting surge - Google Patents
Detector for thunder and lighting surge Download PDFInfo
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- CN2672665Y CN2672665Y CN 200320122374 CN200320122374U CN2672665Y CN 2672665 Y CN2672665 Y CN 2672665Y CN 200320122374 CN200320122374 CN 200320122374 CN 200320122374 U CN200320122374 U CN 200320122374U CN 2672665 Y CN2672665 Y CN 2672665Y
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Abstract
The utility model discloses a detector for thunder and lighting surge, used for detecting the surge property of a thunder and lightning surge protector SPD and detecting the degradation degree, including a charge device, a discharge device and a coupling/decoupling network device. The utility model is characterized in that the detector for thunder and lighting surge also includes a measuring device (3). The charge device (1) which can charge an energy-storage capacitor (13) is connected with the discharge device (2), and the discharge device (2) can discharge the electric energy in the energy-storage capacitor (13) to a mixing waveshaper (22) through a high-voltage discharging switch (21). The discharge device (2) is connected with the measuring device (3), and the coupling/decoupling network device (4) is provided between the discharge device (2) and a power supply. The detector integrates an impulse voltage generator and an impulse current generator with high output amplitude value, and the detector for thunder and lighting surge is matched with the measuring device. The detector for thunder and lighting surge has the advantages of reasonable structure, good stability, safe operation, small size, light weight and low cost, etc.
Description
Technical field
The utility model relates to a kind of testing tool, particularly relates to a kind of thunder and lightning surge tester, is applied to departments such as meteorology, telecommunications, finance, electric power, railway and military affairs, is used to detect the impact characteristics of thunder and lightning surge protector SPD, checks its degradation.
Background technology
In traditional high-voltage test, the overvoltage protection device impulse test is generally separately carried out Low ESR test product and high impedance test product, and the former adopts 8/20 μ s short-circuit impact current feedback circuit, and the latter is then adopted 1.2/50 μ s open-circuit voltage generator.But for low-voltage system, this traditional test is not very perfect.This is because in real thunder and lightning electromagnetic environment, the impedance operator of test product becomes Low ESR by high impedance under lightning impulse, make original surge voltage be converted into dash current immediately: that is surge voltage and dash current can transform mutually by loading condition, therefore is difficult to the characteristic of coming the full test test product with single surge voltage or dash current.Existing 1.2/50 μ s open circuit impulse voltage generator and 8/20 μ s short-circuit impact current feedback circuit are difficult to satisfy testing requirements.
For low-voltage distribution system, in the relevant criterion such as the IEC61643.1 of International Electrotechnical Commission, proposed to adopt 1.2/50 μ s～8/20 μ s hybrid waveform simulation Lightning Electromagnetic Pulse.When surge protector was carried out impulse test, hybrid waveform can better reflect the actual conditions of Lightning Electromagnetic Pulse in the low-voltage distribution system.Integrate impulse voltage generator and impulse current generator at present, the high impedance test product be can be used as 1.2/50 μ s open-circuit voltage generator uses, to the Low ESR test product can be used as mixing wave producer that 8/20 μ s short-circuit current generator uses mostly complex structure, bulky, cost an arm and a leg; Simultaneously measurement mechanism also needs to join in addition, has increased equipment cost and the complicacy that is connected greatly, can only for scientific research department do research with and surge test is carried out at the scene that should not transport to.
Chinese patent 99201288.0 discloses a kind of hybrid waveform generator, is made up of charge circuit, discharge loop and other control, measurement loop.It is that 2kA, short-circuit current are the 1.2/50us﹠amp of 1kV that this generator can only produce open-circuit voltage; 8/20us mixing ripple, and it does not have the relevant detection interface circuit, measure residual voltage and electric current with high-voltage probe and Rogovski coil, be difficult to satisfy the needs of test.
Summary of the invention
Technical problem to be solved in the utility model is: provide a kind of and integrate impulse voltage generator and impulse current generator, output amplitude is big, and is furnished with measurement mechanism, rational in infrastructure, good stability, use are reliable, the thunder and lightning surge tester that volume is little, in light weight, price is low.
The technical scheme in the invention for solving the above technical problem is: this thunder and lightning surge tester, comprise charging device, electric discharge device and coupling/decoupling network device, its design feature is: also comprise measurement mechanism, to the charging device of energy-storage capacitor charging with by high-voltage discharging switch the voltage on the energy-storage capacitor is discharged into the electric discharge device that hybrid waveform forms on the device and links to each other, electric discharge device links to each other with measurement mechanism, is associated with coupling/decoupling network device between electric discharge device and the power supply.To mix wave producer and measurement mechanism fits together, reduce connection, make things convenient for use.
Measurement mechanism described in the utility model contains voltage divider, shunt and residual voltage measuring appliance, the residual voltage measuring appliance comprises high-speed sampling retainer, residual voltage panel table and sequence controller, voltage divider, shunt and high-speed sampling retainer connect the output that hybrid waveform forms device, the output of high-speed sampling retainer connects residual voltage panel table, sequence controller connects high-speed sampling retainer and residual voltage panel table, the output of voltage divider connects residual voltage wave test mouth, and the output of shunt connects current waveform and detects mouth.
Electric discharge device described in the utility model contains high-voltage discharging switch; hybrid waveform forms device and surge voltage follower; high-voltage discharging switch connects charging device respectively and hybrid waveform forms device; the output that hybrid waveform forms device is connecing voltage divider; shunt; connect the surge voltage follower in the time of the high-speed sampling retainer; the surge voltage follower connects tested thunder and lightning surge protector SPD and coupling/decoupling network device; high-voltage discharging switch adopts the vacuum extinction three-phase ac contactor; and adopt three grades to be connected in series synchronously, the surge voltage output negative terminal of surge voltage follower is for suspending ground.The vacuum extinction three-phase ac contactor has the characteristic that high pressure resistant, big current capacity is strong, safe and reliable, noise is little, in light weight, volume is little, the life-span is long as discharge switch.
Charging device described in the utility model contains pressure regulation/stepup transformer, rectification/restrictor, energy-storage capacitor and charging voltage indicator, the input of pressure regulation/stepup transformer connects power supply, exports the input that connects rectification/restrictor, the output of rectification/restrictor connects energy-storage capacitor and charging voltage indicator, and energy-storage capacitor adopts the self-healing impulse capacitor.The self-healing impulse capacitor can stand several ten thousand times discharging and recharging, and volume change is little, has guaranteed the stability of serviceable life of the present utility model and waveform parameter.
Voltage divider described in the utility model adopts capacitive divider, and shunt adopts the little cage type noninductive resistance Rs of volume to be serially connected between the negative terminal and ground of energy-storage capacitor.Effectively eliminate the influence of stray capacitance, stray inductance with this.
The utility model hybrid waveform form device wavefront resistance R _ f and wave rear resistance R t adopt anti-big electric current and high-tension noninductive resistance, its harmonic inductance L and damping resistance Rd are made of one, and adopt little lead coiling and the integrally curing of temperature coefficient.Guaranteeing the stability of parameter, thereby guarantee the stability that hybrid waveform is long-term.
Charging device described in the utility model, electric discharge device, measurement mechanism and coupling/decoupling network device is installed in the cabinet, has charging voltage demonstration, residual voltage demonstration and residual voltage wave test mouth, current waveform on the panel of cabinet and detects mouth.
The utility model compared with prior art has the following advantages: 1, rational in infrastructure, output amplitude big, use reliable.The hybrid waveform of this thunder and lightning surge tester forms device, and surge voltage can take place, dash current can take place again, output open circuit voltage is brought up to 6kV, short-circuit current increases is 3kA, and disposed proving installation, charging device, electric discharge device, measurement mechanism and coupling/decoupling network device is installed in the cabinet, cabinet has the demonstration of measurement parameter panel and residual voltage wave test mouth, current waveform detect mouth, and this structure convenience is connected with digital oscilloscope; Coupling/decoupling network device can prevent that the impacting with high pressure electric current from flowing into AC network when on-line measurement, avoid damaging miscellaneous equipment, has guaranteed safety in utilization.2, good stability, long service life.The discharge switch that this thunder and lightning surge measuring instrument adopts reaches 1,500,000 times mechanical life, and electrical endurance reaches 300,000 times; Energy-storage capacitor adopts the self-healing impulse capacitor, can stand several ten thousand times discharge and recharge, and volume change is little, has guaranteed the serviceable life of this instrument and the stability of waveform parameter.3, volume is little, in light weight, price is low.This thunder and lightning surge tester adopts little, the lightweight discharge switch of volume, energy-storage capacitor, cabinet etc., has realized whole tester miniaturization.
Description of drawings
Fig. 1 is the cabinet panel structural representation of the utility model embodiment.
Fig. 2 is the utility model embodiment circuit block diagram.
Fig. 3 is the utility model embodiment circuit theory diagrams.
Embodiment
Example structure is referring to Fig. 1-Fig. 3.This thunder and lightning surge tester comprises charging device 1, electric discharge device 2, measurement mechanism 3 and coupling/decoupling network device 4.To the charging device 1 of energy-storage capacitor 13 charging with by high-voltage discharging switch 21 electric energy on the energy-storage capacitor 13 is discharged into the electric discharge device 2 that hybrid waveform forms on the device 22 and links to each other, electric discharge device 2 links to each other with measurement mechanism 3, is associated with coupling/decoupling network device 4 between electric discharge device 2 and the power supply.Described charging device 1, electric discharge device 2, measurement mechanism 3 and coupling/decoupling network device 4 can be installed in the cabinet 5.
The charging device 1 of this tester contains pressure regulation/stepup transformer 11, rectification/restrictor 12, energy-storage capacitor 13 and charging voltage indicator 14.The input of pressure regulation/stepup transformer 11 connects power supply, exports the input that connects rectification/restrictor 12, and the output of rectification/restrictor 12 connects energy-storage capacitor 13 and charging voltage indicator 14.The ac high voltage that charging device 1 is produced by pressure regulation/step-up transformer 11 is through rectification/restrictor 12 high-voltage rectifyings, and current-limiting resistance is housed in energy in the energy-storage capacitor 13 energy-storage capacitor 13 chargings, forms the high pressure that reaches more than the 6kV at its two ends.Energy-storage capacitor 13 is Primary Components of tester, and the stability of its life-span and capacitance parameter will directly influence the serviceable life of this tester and the stability of output waveform parameter.The utility model energy-storage capacitor 13 is selected the self-healing impulse capacitor that volume is little, in light weight, high voltage withstanding, the life-span is long, electric capacitance change is little for use.Present embodiment adopts MKMJ7 μ F/9kv self-healing impulse capacitor, and weight only be 1kg, and energy self-regeneration when being impacted, and can stand several ten thousand times discharge and recharge, and volume change is little.
The electric discharge device 2 of this tester contains high-voltage discharging switch 21, hybrid waveform forms device 22 and surge voltage follower 23.High-voltage discharging switch 21 connects the energy-storage capacitor 13 of charging device 1 and hybrid waveform respectively and forms the output that device 22, hybrid waveform form device 22 and connect voltage divider 31, shunt 32, high-speed sampling retainer 331 and surge voltage follower 23 simultaneously, and surge voltage follower 23 connects tested thunder and lightning surge protector SPD and coupling/decoupling network device 4.When 21 moments of high-voltage discharging switch of electric discharge device 2 were closed, the voltage on the high-voltage pulse energy-storage capacitor 13 was added in hybrid waveform and forms device 22, produces to meet 1.2/50 μ s open-circuit voltage shock wave of IEC standard and the short-circuit current rush ripple of 8/20 μ s.The high-voltage discharging switch 21 of embodiment does not adopt traditional ball-gap discharge device, i.e. switch conduction when voltage difference reaches gas discharge between two balls of ball crack, and this ball-gap discharge device volume is big and discharge spark is arranged, and is dangerous.And adopt the vacuum extinction three-phase ac contactor as discharge switch, adopt three grades of methods of attachment of series connection synchronously.This vacuum extinction three-phase ac contactor has the characteristic that high pressure resistant, anti-big current capacity is strong, safe and reliable, noise is little, in light weight, volume is little, the life-span is long, reaches its mechanical life 1,500,000 times, and electrical endurance reaches 300,000 times.
Along with the raising of voltage, electric current, the influence of element stray parameter is more and more serious.Wavefront resistance R _ f and wave rear resistance R t, harmonic inductance L and damping resistance Rd that hybrid waveform forms device 22 are the critical elements that decision mixes wave-wave shape.For reducing the influence of stray parameter to waveform parameter, wavefront resistance R _ f and wave rear resistance R t adopt anti-big electric current and high-tension noninductive resistance.The inductance that test manifests the noninductive resistance that is adopted has only about 0.1 μ H, has satisfied the hybrid waveform index request.Harmonic inductance L and damping resistance Rd are made of one, and adopt the little lead coiling of temperature coefficient, and integral sealing curing, can guarantee the stability of component parameters, thereby guarantee the stability of hybrid waveform.
The measurement mechanism 3 of this tester contains voltage divider 31, shunt 32 and residual voltage measuring appliance 33.Residual voltage measuring appliance 33 comprises high-speed sampling retainer 331, residual voltage panel table 332 and sequence controller 333.Voltage divider 31, shunt 32 and high-speed sampling retainer 331 connect the output that hybrid waveform forms device 22; The output of high-speed sampling retainer 331 connects residual voltage panel table 332; Sequence controller 333 connects high-speed sampling retainer and residual voltage panel table 332; The output of voltage divider 31 connects residual voltage wave test mouth 34; The output of shunt 32 connects current waveform and detects mouth 35.Voltage divider 31 adopts capacitive divider, and the influence of stray capacitance can be ignored, and the residual voltage waveform of being surveyed is undistorted, surveys residual voltage waveform basically identical with using high-voltage probe.Shunt 32 adopts the little cage type noninductive resistance Rs of volume to be serially connected between the negative terminal and ground of energy-storage capacitor 13, connects digital oscilloscope by 75 Ω build-out resistor R3.After adopting this noninductive shunt and 75 Ω build-out resistors, the waveform of being surveyed on oscillograph is surveyed the current waveform basically identical with adopting rogowski coil.F-fuse among Fig. 3, the K-power switch, the BT-pressure regulator, the T1-220/6000V high-tension transformer, the T2-220/15V power transformer, the D-high-voltage rectification silicon stack, the R-restrictor, S-vacuum extinction three-phase ac contactor is a high-voltage discharging switch 21, R1-charging voltage voltage divider high-voltage arm, R2-charging voltage voltage divider low-voltage arm, PR-low-voltage arm trimmer resistor, R4-residual voltage voltage divider high-voltage arm resistance, R5-residual voltage voltage divider low-voltage arm resistance, the R6-build-out resistor, CH1-residual voltage lead-out terminal is a residual voltage wave test mouth 34, CH2-current output terminal is that current waveform detects mouth 35, Cs high-voltage energy storage capacitor device 13, C1-capacitive divider high-voltage arm electric capacity, C2-capacitive divider low-voltage arm electric capacity, M1-charging voltage panel table is that charging voltage shows 51, M2-residual voltage table is a residual voltage panel table 332, the DCN-decoupling network promptly is coupled/decoupling network device 4, the GDT-gas-discharge tube.
High-speed sampling retainer 331 carries out high-speed sampling with fleeting residual voltage peak value and also keeps when impacting, its input and output were adopted respectively 200: 1 and 5: 1 voltage dividers are operated in the linear zone high-speed sampling holding circuit 331, solved the nonlinearity erron of measuring residual voltage.Residual voltage panel table 332 carries out mould/transformation of variables to the peak value of high-speed sampling retainer 331 gained, becomes digital signal, is presented on the panel.Sequence controller 333 is finished functions such as sampling, maintenance, data interlock, zero clearing automatically in order, has simplified operation greatly.
The coupling of this tester/when decoupling network device 4 solved on-line measurement, the impacting with high pressure electric current flowed into AC network, damaged the hidden danger of miscellaneous equipment.
May be when the builtin voltage of this tester is maximum up to 8kV, the tester volume is little in addition, the inner space is little, and the distance between parts is little, but potential difference (PD) is big, thereby be easy to cause the flashover sparking between parts.This tester is taked measures such as multiple insulation, isolation, curing for this reason, adopts the optimal layout that the flashover sparking can not take place.Under high voltage and big electric current, ground connection is a very important problem simultaneously.This tester adopt to suspend ground and protection ground, the extraneously earthing mode that links to each other with this organizational security with protecting.The surge voltage output negative terminal of surge voltage follower 23 is for suspending ground.By reasonable ground connection, the output waveform stability that this tester is measured is higher, and the residual voltage value and the waveform of measurement are also relatively stable.
This thunder and lightning surge tester is the complete supporting testing tool of a kind of zone face plate demonstration and multiple output interface, have on the panel 50 of its cabinet 5 that charging voltage shows 51, residual voltage show 332 and residual voltage wave test mouth 34, current waveform detect mouthfuls 35, also have reset switch 53, maintained switch 54, calibration knob 55,5V self-check key 56, high voltage adjusting knob 57, power switch 58, decoupling power supply positive and negative output terminal on the panel 50 of embodiment at wiretap 59, surge voltage follower 23.
If cabinet 5 adopts the U4 standard PC case, then coupling/decoupling network device 4 can be contained in separately in another cabinet.
Claims (7)
1, a kind of thunder and lightning surge tester, comprise charging device, electric discharge device and coupling/decoupling network device, it is characterized in that: also comprise measurement mechanism (3), to the charging device (1) of energy-storage capacitor (13) charging with by high-voltage discharging switch (21) electric discharge device (2) that the electric energy on the energy-storage capacitor (13) discharges on the hybrid waveform formation device (22) is linked to each other, electric discharge device (2) links to each other with measurement mechanism (3), is associated with coupling/decoupling network device (4) between electric discharge device (2) and the power supply.
2, thunder and lightning surge tester according to claim 1, it is characterized in that: described measurement mechanism (3) contains voltage divider (31), shunt (32) and residual voltage measuring appliance (33), residual voltage measuring appliance (33) comprises high-speed sampling retainer (331), residual voltage panel table (332) and sequence controller (333), voltage divider (31), shunt (32) and high-speed sampling retainer (331) connect the output that hybrid waveform forms device (22), the output of high-speed sampling retainer (331) connects residual voltage panel table (332), sequence controller (333) connects high-speed sampling retainer (331) and residual voltage panel table (332), the output of voltage divider (31) connects residual voltage wave test mouth (34), and the output of shunt (32) connects current waveform and detects mouthful (35).
3; thunder and lightning surge tester according to claim 1; it is characterized in that: described electric discharge device (2) contains high-voltage discharging switch (21); hybrid waveform forms device (22) and surge voltage follower (23); high-voltage discharging switch (21) connects charging device (1) respectively and hybrid waveform forms device (22); the output that hybrid waveform forms device (22) is connecing voltage divider (31); shunt (32); connect surge voltage follower (23) in the time of high-speed sampling retainer (331); surge voltage follower (23) connects tested thunder and lightning surge protector SPD and coupling/decoupling network device (4); high-voltage discharging switch (21) adopts the vacuum extinction three-phase ac contactor; and adopt three grades to be connected in series synchronously, the surge voltage output negative terminal of surge voltage follower (23) is for suspending ground.
4, according to claim 1 or 3 described thunder and lightning surge testers, it is characterized in that: described charging device (1) contains pressure regulation/stepup transformer (11), rectification/restrictor (12), energy-storage capacitor (13) and charging voltage indicator (14), the input of pressure regulation/stepup transformer (11) connects power supply, exports the input that connects rectification/restrictor (12), the output of rectification/restrictor (12) connects energy-storage capacitor (13) and charging voltage indicator (14), and energy-storage capacitor (13) adopts the self-healing impulse capacitor.
5, thunder and lightning surge tester according to claim 2 is characterized in that: described voltage divider (31) adopts capacitive divider, and shunt (32) adopts the little cage type noninductive resistance Rs of volume to be serially connected between the negative terminal and ground of energy-storage capacitor (13).
6, according to claim 1 or 3 described thunder and lightning surge testers, it is characterized in that: wavefront resistance R _ f and wave rear resistance R t that described hybrid waveform forms device (22) adopt anti-big electric current and high-tension noninductive resistance, and its harmonic inductance L and damping resistance Rd are made of one, adopt temperature coefficient little lead coiling and integrally curing.
7, thunder and lightning surge tester according to claim 1 and 2, it is characterized in that: described charging device (1), electric discharge device (2), measurement mechanism (3) and coupling/decoupling network device (4) are installed in the cabinet (5), have charging voltage on the panel (50) of cabinet (5) and show that (51), residual voltage show that (332) and residual voltage wave test mouth (34), current waveform detect mouthful (35).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122374 CN2672665Y (en) | 2003-12-12 | 2003-12-12 | Detector for thunder and lighting surge |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320122374 CN2672665Y (en) | 2003-12-12 | 2003-12-12 | Detector for thunder and lighting surge |
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| CN2672665Y true CN2672665Y (en) | 2005-01-19 |
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| CN 200320122374 Expired - Fee Related CN2672665Y (en) | 2003-12-12 | 2003-12-12 | Detector for thunder and lighting surge |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100568694C (en) * | 2008-01-18 | 2009-12-09 | 中兴通讯股份有限公司 | A kind of AC voltage instantaneous change device |
| CN101876680A (en) * | 2010-05-20 | 2010-11-03 | 中兴通讯股份有限公司 | Method and device for assessing protection performance of surge protection device |
| CN101236222B (en) * | 2008-02-25 | 2011-02-09 | 四川电力试验研究院 | Method for applying impact current for measuring grounded screen electric resistance and inductor |
| CN1904627B (en) * | 2006-08-04 | 2011-05-18 | 太原理工大学 | Lightning protector and detection instrument of device and its detection method |
| CN102162829A (en) * | 2011-03-18 | 2011-08-24 | 武汉大学 | Experimental device for multiple lightning current return strokes of surge protection device (SPD) |
| CN103018504A (en) * | 2012-12-19 | 2013-04-03 | 苏州泰思特电子科技有限公司 | Impact current generating device for testing lightning surges |
| CN103018644A (en) * | 2012-12-29 | 2013-04-03 | 青岛纳川电气科技有限公司 | Automatic SPD (surge protective device) lightning stroke current testing system |
| CN103454534A (en) * | 2013-09-10 | 2013-12-18 | 深圳市科威电子测试有限公司 | Surge testing system and surge testing method |
| WO2014139333A1 (en) * | 2013-03-13 | 2014-09-18 | 深圳市科威电子测试有限公司 | Current waveform generation device |
| CN105699814A (en) * | 2016-03-04 | 2016-06-22 | 云南电网有限责任公司电力科学研究院 | Multi-purpose compact type impulse generator |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN106841747A (en) * | 2017-01-24 | 2017-06-13 | 爱普科斯电子元器件(珠海保税区)有限公司 | Dash current tests residual voltage pressure tester and method |
| CN110554245A (en) * | 2019-09-05 | 2019-12-10 | 杭州琼网计算机网络有限公司 | Stray inductance detection device for laminated busbar |
| CN112444700A (en) * | 2020-11-25 | 2021-03-05 | 桂林电力电容器有限责任公司 | Method for testing self-healing performance of self-healing metallized film capacitor |
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2003
- 2003-12-12 CN CN 200320122374 patent/CN2672665Y/en not_active Expired - Fee Related
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904627B (en) * | 2006-08-04 | 2011-05-18 | 太原理工大学 | Lightning protector and detection instrument of device and its detection method |
| CN100568694C (en) * | 2008-01-18 | 2009-12-09 | 中兴通讯股份有限公司 | A kind of AC voltage instantaneous change device |
| CN101236222B (en) * | 2008-02-25 | 2011-02-09 | 四川电力试验研究院 | Method for applying impact current for measuring grounded screen electric resistance and inductor |
| CN101876680A (en) * | 2010-05-20 | 2010-11-03 | 中兴通讯股份有限公司 | Method and device for assessing protection performance of surge protection device |
| CN101876680B (en) * | 2010-05-20 | 2013-11-06 | 中兴通讯股份有限公司 | Method and device for assessing protection performance of surge protection device |
| CN102162829A (en) * | 2011-03-18 | 2011-08-24 | 武汉大学 | Experimental device for multiple lightning current return strokes of surge protection device (SPD) |
| CN102162829B (en) * | 2011-03-18 | 2012-12-26 | 武汉大学 | Experimental device for multiple lightning current return strokes of surge protection device (SPD) |
| CN103018504A (en) * | 2012-12-19 | 2013-04-03 | 苏州泰思特电子科技有限公司 | Impact current generating device for testing lightning surges |
| CN103018644A (en) * | 2012-12-29 | 2013-04-03 | 青岛纳川电气科技有限公司 | Automatic SPD (surge protective device) lightning stroke current testing system |
| WO2014139333A1 (en) * | 2013-03-13 | 2014-09-18 | 深圳市科威电子测试有限公司 | Current waveform generation device |
| CN103454534A (en) * | 2013-09-10 | 2013-12-18 | 深圳市科威电子测试有限公司 | Surge testing system and surge testing method |
| CN103454534B (en) * | 2013-09-10 | 2016-08-10 | 深圳市科威特斯特科技股份有限公司 | Surge test system and method for testing thereof |
| CN105699814A (en) * | 2016-03-04 | 2016-06-22 | 云南电网有限责任公司电力科学研究院 | Multi-purpose compact type impulse generator |
| CN106405170A (en) * | 2016-08-30 | 2017-02-15 | 西安华谱电力设备制造有限公司 | Integrated high frequency and high voltage power source |
| CN106405170B (en) * | 2016-08-30 | 2019-09-10 | 西安华谱电力设备制造有限公司 | A kind of integral type high-frequency and high-voltage power supply |
| CN106841747A (en) * | 2017-01-24 | 2017-06-13 | 爱普科斯电子元器件(珠海保税区)有限公司 | Dash current tests residual voltage pressure tester and method |
| CN110554245A (en) * | 2019-09-05 | 2019-12-10 | 杭州琼网计算机网络有限公司 | Stray inductance detection device for laminated busbar |
| CN110554245B (en) * | 2019-09-05 | 2021-08-17 | 扬州中电电气科技有限公司 | Stray inductance detection device for laminated busbar |
| CN112444700A (en) * | 2020-11-25 | 2021-03-05 | 桂林电力电容器有限责任公司 | Method for testing self-healing performance of self-healing metallized film capacitor |
| CN112444700B (en) * | 2020-11-25 | 2023-11-03 | 桂林电力电容器有限责任公司 | Self-healing performance test method for self-healing metallized film capacitor |
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