CN206209040U - Leakage Current of Zinc-oxide Lightning Arresters measuring system - Google Patents
Leakage Current of Zinc-oxide Lightning Arresters measuring system Download PDFInfo
- Publication number
- CN206209040U CN206209040U CN201621337067.5U CN201621337067U CN206209040U CN 206209040 U CN206209040 U CN 206209040U CN 201621337067 U CN201621337067 U CN 201621337067U CN 206209040 U CN206209040 U CN 206209040U
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- Prior art keywords
- ammeter
- divider resistance
- arrester
- direct current
- zinc
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229960001296 zinc oxide Drugs 0.000 title claims abstract description 15
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 15
- 239000005871 repellent Substances 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 18
- 238000012360 testing method Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 5
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 125000001165 hydrophobic group Chemical group 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006884 silylation reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Thermistors And Varistors (AREA)
Abstract
The utility model discloses a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring system, it is characterised in that：Including high voltage direct current generator, the first DC ammeter, DC microammeter, divider resistance, discharge counter and the second DC ammeter；The high-voltage output end of the high voltage direct current generator is connected with " " terminals of the first DC ammeter, the "+" wiring of the first DC ammeter is connected to the junction of section arrester and lower section arrester, the voltage tester end of high voltage direct current generator is connected with DC microammeter, the end ground connection of high voltage direct current generator；The divider resistance is connected with the lower end after discharge counter parallel connection with lower section arrester, and divider resistance is grounded after being connected with the second DC ammeter；The resistance of the divider resistance is 25k Ω~35k Ω；The utility model can avoid high-altitude from disconnecting the potential safety hazard of high-voltage connection operation, improve operating efficiency and measurement accuracy.
Description
Technical field
The utility model is related to a kind of current measurement system, more particularly to a kind of Leakage Current of Zinc-oxide Lightning Arresters measurement system
System.
Background technology
Arrester when carrying out preventive trial every year, will typically all be kept away because installation number is more and place disperses
Thunder device disconnecting lead, is being installed and used again after pass the test, and the health condition of arrester is detected by testing, it is so not only time-consuming but also
Arduously, and in many cases, voltage class transmission line of electricity high is being carried out when high-altitude disconnects high-voltage connection operation in the presence of very
Big potential safety hazard.Conventional method of testing is to remove the high-voltage connection of arrester to check Zinc-Oxide Arrester (MOA) outward
The filth on surface simultaneously cleans, checks a lead and down conductor of Zinc-Oxide Arrester, checks the safety of arrester in time
Distance, the insulating resistance value for inspecting periodically arrester etc..This mode taken out stitches from high-voltage connection is, it is necessary to manually with the time all
Compare many, and since it is desired that high-altitude application, so there is very big potential safety hazard.
The measuring method of without disconnecting power lead has two-terminal-grounding method and upper underground screen method.Two-terminal-grounding method is in arrester to be measured
Line ball is increased in the junction of two section porcelain vases, and the other end of two section porcelain vases adds ground wire respectively, treats that digital display microampere meter indicates to reach 2000
During microampere, while measuring the 1mA DC reference voltage values of two sections.Two-terminal-grounding method shortcoming has：First, data accuracy is poor,
The shunt voltage value of two economize on electricitys resistance can only be simultaneously read, electric current can be caused to steeply rise when two sections are asynchronous to be punctured and be made measurement
Cannot carry out；Second, there is stealthy risk of equipment damage, economy is general；3rd, generalization is poor, can be only applied to
In 220kV test of lightning arrester, cannot be used on 500kV test of lightning arrester.Upper underground screen method is in the section of arrester to be measured two
Line ball is increased in the junction of porcelain vase, and upper section top adds ground wire, and lower section end is dismantled after ground wire plus shielding line, treats that digital display meter is indicated
Read when reaching 1000 microamperes and save 1mA DC reference voltage values.The shortcoming of upper underground screen method has：Instantly economize on electricity resistance is prior to upper
Section can cause electric current to steeply rise and measurement is carried out when puncturing.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring system, energy
Enough avoid high-altitude from disconnecting the potential safety hazard of high-voltage connection operation, improve operating efficiency and measurement accuracy.
Leakage Current of Zinc-oxide Lightning Arresters measuring system of the present utility model, including high voltage direct current generator, the first direct current
Ammeter, DC microammeter, divider resistance, discharge counter and the second DC ammeter；The height of the high voltage direct current generator
Pressure output end is connected with the "-" terminals of the first DC ammeter, and the "+" wiring of the first DC ammeter is connected to section and takes shelter from the thunder
Device is connected with the lower junction for saving arrester, the voltage tester end of high voltage direct current generator with DC microammeter, high direct voltage hair
The end ground connection of raw device；The divider resistance is connected with the lower end after discharge counter parallel connection with lower section arrester, divider resistance
It is grounded after being connected with the second DC ammeter；The resistance of the divider resistance is 25k Ω~35k Ω.
Further, the divider resistance includes insulating cylinder, the valve element being located in insulating cylinder and the company for being located at insulating cylinder two ends
Connecting terminal, the valve element is formed by organic conductive adhesive by multi-disc resistor disc along being axially bonded successively for insulating cylinder.
Further, the resistor disc is nonlinear resistance body structure.
Further, the outer surface of the resistor disc is provided with water-repellent layer.
The beneficial effects of the utility model：Leakage Current of Zinc-oxide Lightning Arresters measuring system of the present utility model, without tearing open
Connect high-voltage connection, it is to avoid high-altitude disconnects the potential safety hazard of high-voltage connection operation, improves operating efficiency；The setting of divider resistance
Lower section lightning arrestor movement voltage is improve, is made the electric current for flowing through lower section arrester very faint and can be ignored, be not only convenient for surveying
The carrying out of amount, improves measurement accuracy, and effectively prevents lower section arrester because hanging and powered, pacifies with measurement higher
Quan Xing；Magnitude of voltage when upper and lower two section arrester is 1mA by electric current can be measured by the present invention, and in the feelings of 75% voltage
The value of leakage current is measured under condition, the leakage current that is measured with the arrester delivery test of income value will be measured and compared, you can
Verify the state of the arrester.
Brief description of the drawings
The utility model is further described with reference to the accompanying drawings and examples：
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of divider resistance of the present utility model.
Specific embodiment
As shown in the figure：The Leakage Current of Zinc-oxide Lightning Arresters measuring system of the present embodiment, including high voltage direct current generator,
One DC ammeter, DC microammeter, divider resistance, discharge counter and the second DC ammeter；The high direct voltage occurs
The high-voltage output end of device is connected with the "-" terminals of the first DC ammeter, and the "+" wiring of the first DC ammeter is connected to
Section arrester is connected with the lower junction for saving arrester, the voltage tester end of high voltage direct current generator with DC microammeter, direct current
The end ground connection of high pressure generator；The divider resistance is connected with the lower end after discharge counter parallel connection with lower section arrester, point
Piezoresistance is grounded after being connected with the second DC ammeter；The resistance of the divider resistance is 25k Ω~35k Ω.
The measuring method coordinated with the system is comprised the following steps：
A：The high-voltage output end of high voltage direct current generator is connected with the "-" terminals of the first DC ammeter, first is straight
The "+" wiring for flowing ammeter is connected to the junction of section arrester and lower section arrester, and the voltage of high voltage direct current generator is surveyed
Examination end is connected with DC microammeter, the end ground connection of high voltage direct current generator.
B：By resistance for 25k Ω~35k Ω divider resistance it is in parallel with discharge counter after with it is lower save arrester lower end
It is connected, the end ground connection of divider resistance；The setting of divider resistance improves lower section lightning arrestor movement voltage, makes to flow through lower section lightning-arrest
The electric current of device is very faint and can ignore, be not only convenient for measurement carrying out, improve measurement accuracy, and effectively prevent down
Arrester is saved because hanging and powered, with measurement security higher；The divider resistance includes insulating cylinder 1, is located at insulating cylinder 1
In valve element and be located at the connection terminal at the two ends of insulating cylinder 1, the valve element passes through organic conductive adhesive edge by multi-disc resistor disc 2
Axially being bonded successively for insulating cylinder 1 is formed；The resistor disc 2 is nonlinear resistance body structure, to keep the characteristic with arrester
Unanimously, measurement accuracy is improved；The outer surface of the resistor disc 2 is provided with water-repellent layer, and water-repellent layer is mainly by the height containing hydrophobic group
Molecular compound is spun into, and hydrophobic group can be for example one or a combination set of fluorocarbon radical, silylation, to improve the moisture resistance energy of resistor disc 2
Power；During manufacture divider resistance, transformation is processed to insulating cylinder 1 according to the internal diameter size of resistor disc 2 and required piece number, first with heavily fortified point
Hard helical spring fixed spool, there is provided the tightening contact pressure of resistance and terminal, then using organosilicon sealant and sealing ring to exhausted
Edge cylinder 1 carries out encapsulation process, and insulating oil 3 is filled in cylinder as interior insulation medium, constructs and carries out appearance insulating cylinder 1 is improved
After the shielding of face, metal connecting plate is added respectively to form the path of leakage current at the two ends of insulating cylinder 1, while by electricity in two
Extremely respective leading-out terminal facilitates field test wiring, is finally packaged.
C：Lower section arrester is disconnected with the connection of discharge counter, the suitable shelves of DC microammeter are selected as needed
Position, measurement is started after inspection apparatus, meter, test connection are correct；Start high voltage direct current generator, DC current passes through upper section
The valve block of arrester flows into the earth and constitutes loop, when the reading of the first DC ammeter reaches 1mA, DC microammeter with ground connection
Reading be section arrester 1mA voltages；Then discharge the high-voltage output end of high voltage direct current generator and adjust output
Voltage, as the reading U on DC microammeter1During the 1mA voltages of the upper section arrester equal to 75%, the reading of the first DC ammeter
Number I1The leakage current I of as upper section arresteru。
D：After the leakage current of upper section arrester is determined, lower section arrester is disconnected with the connection of divider resistance, by second
The "-" terminals of DC ammeter are connected with the lower end of lower section arrester, the "+" terminals ground connection of the second DC ammeter.
E：Start measurement after inspection apparatus, meter, test connection are correct；Start high voltage direct current generator, when second straight
When the reading for flowing ammeter reaches 1mA, the reading of DC microammeter is the 1mA voltages of lower section arrester；Then it is high to direct current
The high-voltage output end of generator is pressed to discharge and adjust output voltage, as the reading U on DC microammeter2Lower section equal to 75% is kept away
During the 1mA voltages of thunder device, the reading I of the second DC ammeter2The leakage current I of as upper section arresterd。
From the foregoing, it will be observed that this Leakage Current of Zinc-oxide Lightning Arresters measuring system need not disconnect high-voltage connection, it is to avoid high-altitude is torn open
The potential safety hazard of high-voltage connection operation is connect, operating efficiency is improve；The setting of divider resistance improves lower section lightning arrestor movement electricity
Pressure, makes the electric current for flowing through lower section arrester very faint and can ignore, and is not only convenient for the carrying out of measurement, improves measurement accurate
Property, and lower section arrester is effectively prevented because hanging and powered, with measurement security higher；Can be measured by the present invention
Magnitude of voltage when lower two section arrester is 1mA by electric current, and the value of leakage current is measured in the case of 75% voltage, will
The leakage current that measurement income value is measured with the arrester delivery test is compared, you can verify the state of the arrester.
Finally illustrate, above example is only used to illustrate the technical solution of the utility model and unrestricted, although ginseng
The utility model has been described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, without deviating from the objective and model of technical solutions of the utility model
Enclose, it all should cover in the middle of right of the present utility model.
Claims (4)
1. a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring system, it is characterised in that：Including high voltage direct current generator, the first direct current
Ammeter, DC microammeter, divider resistance, discharge counter and the second DC ammeter；The height of the high voltage direct current generator
Pressure output end is connected with the "-" terminals of the first DC ammeter, and the "+" wiring of the first DC ammeter is connected to section and takes shelter from the thunder
Device is connected with the lower junction for saving arrester, the voltage tester end of high voltage direct current generator with DC microammeter, high direct voltage hair
The end ground connection of raw device；The divider resistance is connected with the lower end after discharge counter parallel connection with lower section arrester, divider resistance
It is grounded after being connected with the second DC ammeter；The resistance of the divider resistance is 25k Ω~35k Ω.
2. Leakage Current of Zinc-oxide Lightning Arresters measuring system according to claim 1, it is characterised in that：The divider resistance
Including insulating cylinder, the valve element being located in insulating cylinder and the connection terminal at insulating cylinder two ends is located at, the valve element is by multi-disc resistor disc
Formed along being axially bonded successively for insulating cylinder by organic conductive adhesive.
3. Leakage Current of Zinc-oxide Lightning Arresters measuring system according to claim 2, it is characterised in that：The resistor disc is
Nonlinear resistance body structure.
4. Leakage Current of Zinc-oxide Lightning Arresters measuring system according to claim 3, it is characterised in that：The resistor disc
Outer surface is provided with water-repellent layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621337067.5U CN206209040U (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621337067.5U CN206209040U (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206209040U true CN206209040U (en) | 2017-05-31 |
Family
ID=58751483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621337067.5U Active CN206209040U (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206209040U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572298A (en) * | 2018-06-04 | 2018-09-25 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of more piece arrester test system |
| CN111856113A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Non-intrusive measurement method for true leakage current of zinc oxide arrester |
| CN111856115A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Intervention type measuring method for true leakage current of zinc oxide lightning arrester |
| CN111856114A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Lightning arrester leakage current testing system and method for eliminating parasitic parameter influence |
-
2016
- 2016-12-07 CN CN201621337067.5U patent/CN206209040U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572298A (en) * | 2018-06-04 | 2018-09-25 | 中国南方电网有限责任公司超高压输电公司柳州局 | A kind of more piece arrester test system |
| CN111856113A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Non-intrusive measurement method for true leakage current of zinc oxide arrester |
| CN111856115A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Intervention type measuring method for true leakage current of zinc oxide lightning arrester |
| CN111856114A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Lightning arrester leakage current testing system and method for eliminating parasitic parameter influence |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee after: STATE GRID CORPORATION OF CHINA Patentee after: Super high voltage branch of State Grid Chongqing Electric Power Company Address before: 100031 No. 86 West Chang'an Avenue, Beijing, Xicheng District Patentee before: State Grid Corporation of China Patentee before: State Grid Chongqing Electric Power Company maintenance branch |