CN205374569U - Impact current testing device - Google Patents
Impact current testing device Download PDFInfo
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- CN205374569U CN205374569U CN201521074669.1U CN201521074669U CN205374569U CN 205374569 U CN205374569 U CN 205374569U CN 201521074669 U CN201521074669 U CN 201521074669U CN 205374569 U CN205374569 U CN 205374569U
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- inductance
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Abstract
The utility model discloses an impact current testing device, the device includes: shunt, oscilloscope, high -pressure electric capacity, discharge switch, resistance and inductance, wherein, shunt, high -pressure electric capacity, discharge switch, resistance and inductance are established ties and are looped in, oscilloscope with the shunt is parallelly connected, during the test, will wait the arrester on -line monitoring terminal of detecting and establish ties with the shunt, insert the return circuit that shunt, high -pressure electric capacity, discharge switch, resistance and inductance are established ties and is formed. The utility model discloses a shunt - oscilloscope measures arrester on -line monitoring terminal impulse current's accuracy.
Description
Technical field
This utility model relates to anti-damage to crops caused by thunder technical field, particularly relates to a kind of dash current test device.
Background technology
Owing to being subject to the restriction of zinc oxide material and manufacture level, zinc oxide valve plate is generally only by the lightning current of below 20KA, most of zinc oxide valve plate is only by the lightning current of 5KA, and according to statistics, in China, the lightning current of more than 60% crosses 20KA, the lightning current of more than 80% is more than 10KA, so other way must be wanted the lightning current attacking circuit is limited in 20KA or 10KA even below 5KA, then allowing these lightning currents filtered down by spark gap again, this electric current is exactly the nominal discharge current of spark gap.Specify according to China's standard: the nominal discharge current of spark gap by different electric pressures respectively 20,10,5,3,1KA Pyatyi, namely zinc oxide valve plate can reliably work and itself is damaged under this electric current.
Spark gap nominal discharge current is for dividing spark gap grade, and it is one of most basic technical parameter of spark gap, represents with the lightning impulse current peak value of 8/20 waveform.According to regulation in GB " alternating current gapless metal oxide arrester GB11032 ": spark gap should be able to tolerate the lightning impulse current that waveform is 8/20 equal to the spark gap nominal rating discharge current test of 20 minor peaks, after 20 Secondary Shocks spark gap do not puncture, not flashover, do not damage.And discharge current is much smaller than, when marking discharge stream, having impact essentially without on spark gap.
Metal oxide surge attester with series gap avoids the problem of aging under power-frequency voltage long term, and the impact failure of its running status and accumulation is relevant with the time of dash current and amplitude, causes the time of impact failure and discharge current amplitude to be inversely proportional to.According to the requirement of GB, lightning arrester discharge current peak more than the number of times of mark discharge stream more than 20 times time be accomplished by carrying out alerting and indicating.So the maximum discharge current by spark gap and the number of times more than mark discharge stream, for evaluating the running status of spark gap, there is especially for the spark gap having gap important value and reference significance.Accordingly, it would be desirable to a kind of device dash current can tested, it is possible to detecting whether of confirmation dash current is accurate, evaluates accurately with the running status to spark gap.
Summary of the invention
For solving the technical problem of existing existence, this utility model provides a kind of dash current test device.
For reaching above-mentioned purpose, the technical scheme of this utility model embodiment is achieved in that
A kind of dash current test device, described device includes: diverter, oscillograph, high-voltage capacitance, discharge switch, resistance and inductance, wherein, diverter, high-voltage capacitance, discharge switch, resistance and inductance are connected and form loop, and described oscillograph is in parallel with described diverter；During test, spark gap on-line monitoring terminal to be detected is connected with diverter, access the loop that described diverter, high-voltage capacitance, discharge switch, resistance and inductance series connection are formed.
Wherein, the resistance of described diverter is 0.1m Ω.
This utility model provides a kind of dash current test device, adopts diverter oscilloscope measurement method to measure the accuracy of spark gap on-line monitoring terminal dash current.
Accompanying drawing explanation
In accompanying drawing (it is not necessarily drawn to scale), similar accompanying drawing labelling can at parts similar described in different views.The similar reference numerals with different letter suffix can represent the different examples of similar component.Accompanying drawing generally shows each embodiment discussed herein by way of example and not limitation.
Fig. 1 is the electrical block diagram of this utility model dash current test device.
Detailed description of the invention
This utility model provides a kind of dash current test device, adopts diverter oscilloscope measurement method to measure the accuracy of spark gap on-line monitoring terminal dash current.
As shown in Figure 1, dash current of the present utility model test device includes: diverter 11, oscillograph 12, high-voltage capacitance 13, discharge switch 14, resistance 15 and inductance 16, wherein, diverter 11, high-voltage capacitance 13, discharge switch 14, resistance 15 and inductance 16 are connected and form loop, and oscillograph 12 is in parallel with diverter 11.
During test, spark gap on-line monitoring terminal is connected with diverter 11, access the loop that described diverter 11, high-voltage capacitance 13, discharge switch 14, resistance 15 and inductance 16 series connection are formed, now, spark gap on-line monitoring terminal is identical with the electric current of diverter 11, the voltage of diverter 11 is tested by oscillograph 12, and then confirm the electric current on diverter 11, namely can determine that the electric current of spark gap on-line monitoring terminal, so, whether the dash current that can test the spark gap on-line monitoring terminal originally determined is accurate.
In practical application, as it is shown in figure 1, spark gap on-line monitoring terminal can also add the combination replacement of sampling resistor by inductance.
Wherein, the actual value of dash current can pass through following formula (1) and determines:
i1(t)=u1(t)/Rs(1)
Wherein: u1The magnitude of voltage at diverter 11 two ends is recorded for oscillograph 12；RSFor diverter RSResistance, i is dash current current value, and t represents current time, it is preferable that select diverter 11 resistance be 0.1m Ω.
The above, be only preferred embodiment of the present utility model, is not intended to limit protection domain of the present utility model.
Claims (2)
1. a dash current test device, it is characterized in that, described device includes: diverter, oscillograph, high-voltage capacitance, discharge switch, resistance and inductance, wherein, diverter, high-voltage capacitance, discharge switch, resistance and inductance are connected and form loop, and described oscillograph is in parallel with described diverter；During test, spark gap on-line monitoring terminal to be detected is connected with diverter, access the loop that described diverter, high-voltage capacitance, discharge switch, resistance and inductance series connection are formed.
2. device according to claim 1, it is characterised in that the resistance of described diverter is 0.1m Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521074669.1U CN205374569U (en) | 2015-12-22 | 2015-12-22 | Impact current testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521074669.1U CN205374569U (en) | 2015-12-22 | 2015-12-22 | Impact current testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205374569U true CN205374569U (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521074669.1U Active CN205374569U (en) | 2015-12-22 | 2015-12-22 | Impact current testing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219419A (en) * | 2017-05-26 | 2017-09-29 | 国家电网公司 | One kind is super, ultra-high voltage lightning arrester rapid degradation method and system |
| CN108107261A (en) * | 2017-12-01 | 2018-06-01 | 国网北京市电力公司 | Arrester dash current tests system |
| CN112649652A (en) * | 2020-11-18 | 2021-04-13 | 中国电力科学研究院有限公司武汉分院 | Tracing method and system for impact current magnitude |
| CN114200193A (en) * | 2021-10-29 | 2022-03-18 | 东风商用车有限公司 | Device and method for testing impact current of negative bus of electric automobile |
-
2015
- 2015-12-22 CN CN201521074669.1U patent/CN205374569U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219419A (en) * | 2017-05-26 | 2017-09-29 | 国家电网公司 | One kind is super, ultra-high voltage lightning arrester rapid degradation method and system |
| CN107219419B (en) * | 2017-05-26 | 2023-08-29 | 国家电网公司 | Rapid degradation method and system for ultra-high voltage and extra-high voltage lightning arrester |
| CN108107261A (en) * | 2017-12-01 | 2018-06-01 | 国网北京市电力公司 | Arrester dash current tests system |
| CN112649652A (en) * | 2020-11-18 | 2021-04-13 | 中国电力科学研究院有限公司武汉分院 | Tracing method and system for impact current magnitude |
| CN112649652B (en) * | 2020-11-18 | 2023-10-03 | 中国电力科学研究院有限公司武汉分院 | Tracing method and system for impulse current magnitude |
| CN114200193A (en) * | 2021-10-29 | 2022-03-18 | 东风商用车有限公司 | Device and method for testing impact current of negative bus of electric automobile |
| CN114200193B (en) * | 2021-10-29 | 2024-01-19 | 东风商用车有限公司 | Device and method for testing impact current of negative bus of electric automobile |
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| C14 | Grant of patent or utility model | ||
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Address after: Longhua District of Hainan city in Haikou province 570311 Hai posterior No. 23 Patentee after: Hainan Electric Power Grid Co., Ltd. Electric Power Research Institute Address before: Building Letter No. 123-8 Binhai Road 570105 Hainan city of Haikou province 13 Patentee before: Hainan Power Technology Research Institute |