CN220289806U - Multisection zinc oxide arrester leakage current measures auxiliary device - Google Patents
Multisection zinc oxide arrester leakage current measures auxiliary device Download PDFInfo
- Publication number
- CN220289806U CN220289806U CN202321345955.1U CN202321345955U CN220289806U CN 220289806 U CN220289806 U CN 220289806U CN 202321345955 U CN202321345955 U CN 202321345955U CN 220289806 U CN220289806 U CN 220289806U
- Authority
- CN
- China
- Prior art keywords
- detection loop
- electrically connected
- leakage current
- auxiliary device
- microammeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 239000011787 zinc oxide Substances 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000005259 measurement Methods 0.000 claims abstract description 15
- 239000004593 Epoxy Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims 2
- 241001330002 Bambuseae Species 0.000 claims 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims 2
- 239000011425 bamboo Substances 0.000 claims 2
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
Abstract
The utility model discloses a multisection zinc oxide arrester leakage current measurement auxiliary device, which comprises a voltage doubling cylinder, wherein the voltage doubling cylinder is electrically connected with a control console; the voltage doubling cylinder is electrically connected with the lightning arrester to be tested through a high-voltage cable; the lightning arrester is electrically connected with the auxiliary device body, the auxiliary device body comprises an epoxy plate, and the surface of the epoxy plate is connected with a first detection loop and a second detection loop; the first detection loop comprises a first adjustable resistor and a first microammeter which are connected in series, one end of the first detection loop is electrically connected with the first wiring terminal, and the other end of the first detection loop is electrically connected with the first grounding terminal. The device has solved prior art and has needed the line change many times, and efficiency is lower, and microammeter reading can't accurate reaction actual measurement festival arrester leakage current value's problem, has the leakage current that can measure two sections arresters simultaneously, reduces the line number of times of changing, has improved work efficiency, microammeter measurement data is measuring festival arrester leakage current actual value simultaneously, has improved the characteristics of data's reliability.
Description
Technical Field
The utility model belongs to the technical field of lightning arrester leakage detection, and particularly relates to a multisection zinc oxide lightning arrester leakage current measurement auxiliary device.
Background
The zinc oxide lightning arrester is used as protection equipment of a hydropower station, and plays roles of discharging and breaking by utilizing good nonlinear volt-ampere characteristics of the zinc oxide lightning arrester; under the system operation voltage, the resistance is large, the passing current is small, so that the valve plate cannot be burnt by the small current, and the power frequency operation voltage can be isolated without a series gap; when the voltage rises, the resistance of the device becomes very small, the device can be protected by high current and very low residual voltage, and the device returns to the original state after the overvoltage disappears; the 500kV line outgoing lightning arrester consists of an upper section, a middle section and a lower section which are connected in series, according to the preventive test rule of electric equipment, direct-current withstand voltage and leakage current measurement tests are required to be carried out on the lightning arrester at regular intervals, the leakage current under the direct-current 1mA reference voltage and 75% reference voltage of each section of lightning arrester is measured, the leakage current can reflect the insulation condition of the lightning arrester, and the method is an important means for judging whether the lightning arrester is good or not under the running voltage; in the prior art, when the direct-current withstand voltage and leakage current measurement test is carried out on the lightning arresters, the leakage current under the direct-current 1mA reference voltage and 75% reference voltage of each section of lightning arresters is usually measured respectively, and the non-measurement section of lightning arresters are directly grounded or suspended. The prior art has the following disadvantages:
1, 9 sections of three-phase lightning arresters are used, when the direct current 1mA reference voltage and the leakage current under 75% reference voltage of each section of lightning arresters are respectively measured, the line is required to be replaced for a plurality of times, and the working efficiency is low; and 2, the microammeter is generally arranged at the high-voltage output end, and when the microammeter is tested on the multi-section lightning arrester, the microammeter reads the sum of leakage current values of the measured section lightning arrester and the non-measured section lightning arrester, and the leakage current value of the section lightning arrester is not actually measured.
Therefore, there is a need to design a multisection zinc oxide arrester leakage current measurement auxiliary device to solve the above problems.
Disclosure of Invention
The utility model aims to solve the technical problems of providing the multisection zinc oxide arrester leakage current measurement auxiliary device, which solves the problems that the prior art needs to change lines for many times, the efficiency is low, microammeter readings cannot accurately reflect the actual measured leakage current values of the section arresters, and has the characteristics that the leakage currents of two sections arresters can be measured simultaneously, the line changing times are reduced, the working efficiency is improved, and meanwhile microammeter measurement data is the actual measured leakage current values of the section arresters, and the reliability of the data is improved.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the leakage current measurement auxiliary device of the multisection zinc oxide arrester comprises a voltage doubling cylinder, wherein the voltage doubling cylinder is electrically connected with a control console; the voltage doubling cylinder is electrically connected with the lightning arrester to be tested through a high-voltage cable; the lightning arrester is electrically connected with the auxiliary device body, the auxiliary device body comprises an epoxy plate, and the surface of the epoxy plate is connected with a first detection loop and a second detection loop; the first detection loop comprises a first adjustable resistor and a first microammeter which are connected in series, one end of the first detection loop is electrically connected with the first wiring terminal, and the other end of the first detection loop is electrically connected with the first grounding terminal.
Preferably, the second detection loop comprises a second adjustable resistor and a second microammeter which are connected in series, one end of the second detection loop is electrically connected with the second wiring terminal, and the other end of the second detection loop is electrically connected with the second grounding terminal.
Further, the first adjustable resistor and the second adjustable resistor are megaohm adjustable resistors.
Preferably, a third ground terminal is connected to the surface of the epoxy board.
The beneficial effects of the utility model are as follows:
the device can measure the leakage current of two sections of lightning arresters under direct current 1mA reference voltage and 75% reference voltage simultaneously, reduces repeated wiring times, improves the accuracy of the measured value of the leakage current of the lightning arresters, provides reliable basis for checking whether the lightning arresters are damped or deteriorated and determining whether the action performance of the lightning arresters accords with the product performance requirement, and solves the problems that the prior art needs to change lines for many times, the efficiency is low, and microampere meter reading cannot accurately reflect the actual measured leakage current value of the section of lightning arresters.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the structure of the present utility model in practice;
the reference numerals in the drawings are: an epoxy board 1, a first adjustable resistor 2, a second adjustable resistor 3, a first microammeter 4, a second microammeter 5, a first wiring terminal 6, the lightning arrester comprises a second wiring terminal 7, a first grounding terminal 8, a second grounding terminal 9, a third grounding terminal 10, a voltage doubling cylinder 11, a console 12 and a lightning arrester 13.
Detailed Description
As shown in fig. 1-2, an auxiliary device for measuring leakage current of a multisection zinc oxide arrester comprises a voltage doubling cylinder 11, wherein the voltage doubling cylinder 11 is electrically connected with a console 12; the voltage doubling cylinder 11 is electrically connected with the lightning arrester 13 to be tested through a high-voltage cable; the lightning arrester 13 is electrically connected with an auxiliary device body, the auxiliary device body comprises an epoxy plate 1, and a first detection loop and a second detection loop are connected to the surface of the epoxy plate 1; the first detection loop comprises a first adjustable resistor 2 and a first microammeter 4 which are connected in series, one end of the first detection loop is electrically connected with a first wiring terminal 6, and the other end of the first detection loop is electrically connected with a first grounding terminal 8.
Preferably, the second detection loop comprises a second adjustable resistor 3 and a second microammeter 5 which are connected in series, one end of the second detection loop is electrically connected with the second wiring terminal 7, and the other end of the second detection loop is electrically connected with the second grounding terminal 9.
Preferably, the epoxy board 1 has a third ground terminal 10 connected to the surface thereof.
The working principle of the multisection zinc oxide arrester leakage current measurement auxiliary device is as follows:
as shown in fig. 2, when the leakage current of the two lightning arresters 13 on each phase and in each phase is measured, the second section is electrically connected with the voltage doubling cylinder 11, the voltage doubling cylinder 11 is used for pressurizing, and the first section and the third section are respectively connected with the first wiring terminal 6 and the second wiring terminal 7; if the direct current 1mA reference voltages of the upper section of lightning arrester 13 and the middle section of lightning arrester 13 are similar, the resistance values of the adjustable resistors are adjusted to 0, and the leakage currents of the direct current 1mA reference voltages and 75% reference voltages of the upper section of lightning arrester 13 and the middle section of lightning arrester 13 can be measured simultaneously; if the direct current 1mA reference voltage difference between the upper section and the middle section of the lightning arresters 13 is larger, the upper section is assumed to be U1, the middle section is assumed to be U2, U2 is larger than U1, the upper section of the lightning arresters 13 is connected with an adjustable resistor when the middle section is measured, the resistance is adjusted to be not smaller than the value (U2-U1), the direct measurement can be carried out when the upper section is measured, and the resistance of the adjustable resistor is adjusted to be 0; and when the lower section is measured, the second section and the third section are pressurized in a short circuit mode, the first section and the fourth section are respectively connected with the first wiring terminal 6 and the second wiring terminal 7, the direct current 1mA reference voltage of the upper section and the lower section of the lightning arresters 13 is compared, and the resistance value of the adjustable resistor is selected according to the difference value.
The foregoing embodiments are merely preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without collision. The protection scope of the present utility model is defined by the claims, and the protection scope includes equivalent alternatives to the technical features of the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.
Claims (3)
1. The utility model provides a multisection zinc oxide arrester leakage current measures auxiliary device, includes a voltage doubling section of thick bamboo (11), voltage doubling section of thick bamboo (11) and control cabinet (12) electric connection; the voltage doubling cylinder (11) is electrically connected with the lightning arrester (13) to be tested through a high-voltage cable; the method is characterized in that: the lightning arrester (13) is electrically connected with the auxiliary device body, the auxiliary device body comprises an epoxy plate (1), and a first detection loop and a second detection loop are connected to the surface of the epoxy plate (1); the first detection loop comprises a first adjustable resistor (2) and a first microammeter (4) which are connected in series, one end of the first detection loop is electrically connected with the first wiring terminal (6), and the other end of the first detection loop is electrically connected with the first grounding terminal (8).
2. The multisection zinc oxide arrester leakage current measurement assisting device according to claim 1, wherein: the second detection loop comprises a second adjustable resistor (3) and a second microammeter (5) which are connected in series, one end of the second detection loop is electrically connected with a second wiring terminal (7), and the other end of the second detection loop is electrically connected with a second grounding terminal (9).
3. The multisection zinc oxide arrester leakage current measurement assisting device according to claim 1, wherein: and a third grounding terminal (10) is connected to the surface of the epoxy plate (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321345955.1U CN220289806U (en) | 2023-05-30 | 2023-05-30 | Multisection zinc oxide arrester leakage current measures auxiliary device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321345955.1U CN220289806U (en) | 2023-05-30 | 2023-05-30 | Multisection zinc oxide arrester leakage current measures auxiliary device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220289806U true CN220289806U (en) | 2024-01-02 |
Family
ID=89339219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321345955.1U Active CN220289806U (en) | 2023-05-30 | 2023-05-30 | Multisection zinc oxide arrester leakage current measures auxiliary device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220289806U (en) |
-
2023
- 2023-05-30 CN CN202321345955.1U patent/CN220289806U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104155526A (en) | Method for measuring impact earthing impedance of electric transmission overhead line structure earthing device with lightning conductor | |
| JP2018532249A (en) | Capacitor-type instrument transformer for transient overvoltage monitoring system | |
| CN102426283B (en) | System for testing current density and waveform of pole plate of electrostatic dust collector | |
| CN102901894A (en) | Test method and device for testing 500kV zinc oxide arrester | |
| CN110854809A (en) | Detection method of transformer neutral point protection device and protection device | |
| CN220289806U (en) | Multisection zinc oxide arrester leakage current measures auxiliary device | |
| CN102221652A (en) | Method and device for testing 500kV metal oxide arrester | |
| Melvold et al. | Transient overvoltages on an HVDC bipolar line during monopolar line faults | |
| CN111007393A (en) | High-voltage circuit breaker loop resistance test circuit | |
| CN110320395A (en) | On-line monitoring high-precision capacitance-resistance parallel voltage divider | |
| CN1123777C (en) | Method and apparatus for on-line testing lightning arrester | |
| CN107843759A (en) | The surge current test system and method for testing of electronic equipment in spacecraft | |
| CN111537797B (en) | System and method for measuring insulation resistance of transformer substation without disassembling lead | |
| CN104656048B (en) | A kind of calibration method of switch action characteristic testing stand | |
| CN107727974B (en) | Lightning arrester test device and method based on volt-ampere characteristic deviation | |
| CN113820536A (en) | Zinc oxide arrester live-line detection method based on wireless synchronous current measurement technology | |
| Schei | Diagnostics techniques for surge arresters with main reference to on-line measurement of resistive leakage current of metal-oxide arresters | |
| CN109164338B (en) | High-power medium-voltage direct-current dry-type load device with online monitoring function | |
| CN202837440U (en) | Testing apparatus for testing 500 kV zinc oxide arrester | |
| CN111257604A (en) | Upper section test wiring device for 500kV and above voltage level lightning arrester | |
| CN218567454U (en) | Auxiliary device for lightning arrester leakage current test | |
| CN215180522U (en) | Electric field probe for online monitoring of metal oxide lightning arrester of distribution network | |
| CN111856108B (en) | Buried pipeline potential rise experiment system | |
| CN112326736B (en) | Nondestructive testing method for zinc oxide arrester valve plate | |
| Kershaw et al. | Discharge voltage of arrester connecting lead wires |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |