CN114859127A - Sample high-voltage resistivity testing device - Google Patents
Sample high-voltage resistivity testing device Download PDFInfo
- Publication number
- CN114859127A CN114859127A CN202210663438.2A CN202210663438A CN114859127A CN 114859127 A CN114859127 A CN 114859127A CN 202210663438 A CN202210663438 A CN 202210663438A CN 114859127 A CN114859127 A CN 114859127A
- Authority
- CN
- China
- Prior art keywords
- resistivity
- electrode
- small sample
- voltage
- opening
- 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.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a sample high-voltage resistivity testing device, wherein a small sample to be tested consists of an insulating paper board with an opening with a preset size dug in the middle, a small sample with a preset size and a polyimide adhesive tape, the small sample is attached to the opening of the insulating paper board through the polyimide adhesive tape, so that the small sample can also measure the volume resistivity, the creepage distance along the surface is increased by the insulating paper board, the leakage current is reduced, a spring can enable a protective electrode and a measuring electrode to be in full contact with the small sample to be tested, the flowing current is just the current flowing on the electrode in contact with the small sample, the protective electrode and the insulating paper board are in full contact with each other, and the effect of leading out the surface current can be achieved. The method solves the technical problems that the traditional resistivity test method for the solid insulating material is easy to generate creepage along the surface and even cause creepage discharge to influence the test accuracy under the conditions of high voltage, large field intensity and small sample size.
Description
Technical Field
The invention relates to the technical field of resistivity measuring devices, in particular to a sample high-voltage resistivity testing device.
Background
With the continuous improvement of the transmission voltage grade of the power grid and the development of the direct-current transmission technology, on one hand, a new challenge is provided for the design of an insulation structure of transmission equipment, and on the other hand, higher requirements are provided for the performance of absolute materials. In contrast to ac transmission, the electric field distribution in a high voltage installation under the influence of a dc voltage depends on the resistivity of the material, for example the main insulation of the high voltage dc bushing, the main insulation of the high voltage cable accessories, etc.
The traditional resistivity test method for the solid insulating material comprises the following steps: under high temperature and normal pressure, an insulation resistance standard three-electrode test system is adopted to apply direct current high voltage to a solid insulation material sheet-shaped pattern, and a galvanometer is utilized to measure the current flowing through the insulation material, so that the resistivity of the insulation material under different electric field strengths is calculated, and the nonlinear law of the resistivity is searched. The test method usually needs to apply higher direct current voltage so as to obtain enough data points, but when the applied direct current voltage is too high, the electric field intensity is too large, and the size of the obtained material is too small, the surface leakage current of a tested sample is increased, the creepage problem along the surface is generated, even creeping discharge is caused, the test accuracy is influenced, in severe cases, test equipment is burnt, the test cannot be normally carried out, and great difficulty is brought to the test of the resistivity of the insulating material of a small sample under high electric field intensity. Therefore, a high-voltage resistivity testing technology for small samples needs to be researched to solve the problem that the traditional resistivity testing method for the solid insulating material is easy to generate creepage along the surface and even cause creeping discharge to influence the testing accuracy under the conditions of high voltage, large field intensity and small sample size.
Disclosure of Invention
The invention provides a sample high-voltage resistivity testing device, which is used for solving the technical problem that the traditional solid insulating material resistivity testing method is easy to generate creepage along the surface even causes creeping discharge to influence the testing accuracy under the conditions of high voltage, large field intensity and small sample size.
In view of the above, the present invention provides a sample high-voltage resistivity testing apparatus, including:
the device comprises a small sample to be tested, an upper computer, an electrometer, a direct-current power supply power amplifier and a resistivity test platform;
the small sample piece to be measured comprises an insulating paper board with an opening with a preset size dug in the middle, a small sample with a preset size and a polyimide adhesive tape, wherein the small sample is placed in the opening of the insulating paper board, and the polyimide adhesive tape surrounds the periphery of the small sample and fixes the small sample on the insulating paper board;
the resistivity test platform comprises a resistivity test cavity shell, a resistivity test cavity, a high-voltage electrode, a measuring electrode, a protective electrode, a spring, a polytetrafluoroethylene sheath, a first epoxy resin block, a second epoxy resin block and a non-metal sheath;
the high-voltage electrode, the measuring electrode, the protective electrode, the spring, the polytetrafluoroethylene sheath, the first epoxy resin block, the second epoxy resin block and the nonmetal sheath are arranged inside the resistivity testing cavity, a first opening and a second opening are formed in the top of the resistivity testing cavity, the first opening and the second opening are respectively provided with the first epoxy resin block and the second epoxy resin block in a penetrating mode, a third opening is formed in the bottom of the resistivity testing cavity, the high-voltage electrode is of a T-shaped structure, and a vertical end of the high-voltage electrode extends out of the resistivity testing cavity from the third opening;
the small sample piece to be measured is placed between the high-voltage electrode and the measuring electrode, the measuring electrode and the high-voltage electrode act to press the small sample of the small sample piece to be measured, the protective electrodes are arranged on the left side and the right side of the measuring electrode and act with the high-voltage electrode to press the insulating paper board of the small sample piece to be measured;
the protection electrode is connected with the top of the resistivity cavity through a polytetrafluoroethylene sheath and is fixed with the polytetrafluoroethylene sheath through a non-metal sheath, the polytetrafluoroethylene sheath is arranged at the upper left side and the upper right side of the resistivity testing cavity corresponding to the measuring electrode, the polytetrafluoroethylene sheath is fixed at the top of the resistivity testing cavity through the non-metal sheath, one end of the spring is fixed at the top of the measuring electrode, the other end of the spring is fixed at the upper end of the corresponding polytetrafluoroethylene sheath, and the bottom of the high-voltage electrode is connected with the resistivity testing cavity shell through the polytetrafluoroethylene sheath;
the electrometer is connected with the host computer, and first epoxy piece top is connected with the electrometer, and the bottom is passed through the lead wire and is connected with measuring electrode, and second epoxy piece top is connected with the electrometer, and the bottom is passed through the lead wire and is connected with right side guard electrode, and the vertical end bottom and the DC power supply power amplifier of high voltage electrode are connected, and the electrometer ground connection.
Alternatively, the dimensions of the small sample are 7mm x 2mm and the measuring electrode is a 7mm diameter disk electrode.
Optionally, the insulating cardboard has a size of 100mm × 100mm × 2 mm.
Alternatively, the electrometer is a 6514 model editable electrometer.
Optionally, the resistivity test chamber housing is made of stainless steel.
Optionally, the resistivity test cavity housing is integrally provided with supporting legs.
Optionally, the bottom of the supporting foot is provided with a detachably mounted universal wheel.
According to the technical scheme, the sample high-voltage resistivity testing device provided by the invention has the following advantages:
the invention provides a sample high-voltage resistivity testing device, a small sample to be tested consists of an insulating paper board with an opening with a preset size dug in the middle, a small sample with a preset size and a polyimide adhesive tape, the small sample is attached to the opening of the insulating paper board through the polyimide adhesive tape, so that the small sample can also measure the volume resistivity, the creepage distance along the surface is increased by the insulating paper board, the leakage current is reduced, a spring can ensure that a protective electrode and a measuring electrode are fully contacted with the small sample to be tested, the flowing current is just the current flowing on the electrode contacted with the small sample, the protective electrode and the insulating paper board are fully contacted with each other, and the effect of leading out the surface current can be achieved, therefore, the sample high-voltage resistivity testing device provided by the invention provides a solution for the test of the resistivity of the small sample under the high electric field intensity, the method solves the technical problems that the traditional resistivity test method for the solid insulating material is easy to generate creepage along the surface and even cause creepage discharge to influence the test accuracy under the conditions of high voltage, large field intensity and small sample size.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other related drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a small sample to be tested of a sample high-voltage resistivity testing device provided in the present invention;
FIG. 2 is a schematic diagram of the overall structure of a sample high-voltage resistivity testing device provided in the present invention;
wherein the reference numerals are:
1. an upper computer; 22. an electrometer; 3. a DC power supply power amplifier; 4. a resistivity test cavity; 5. a resistivity test cavity housing; 6. a measuring electrode; 7. a guard electrode; 8. a small sample to be tested; 8-1, insulating paperboard; 8-2, polyimide tape; 8-3, small sample; 9. a polytetrafluoroethylene sheath; 10. supporting legs; 11. a lead wire; 12. a high voltage electrode; 13. a second epoxy resin block; 14. a spring; 15. a non-metallic sheath; 16. a first epoxy block.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For ease of understanding, referring to fig. 1 and 2, an embodiment of a sample high voltage resistivity testing apparatus is provided in the present invention, comprising:
the device comprises a small sample piece to be tested 8, an upper computer 1, an electrometer 2, a direct-current power supply power amplifier 3 and a resistivity test platform;
the small sample piece 8 to be measured comprises an insulating paper board 8-1 with an opening with a preset size dug in the middle, a small sample 8-3 with a preset size and a polyimide adhesive tape 8-2, wherein the small sample 8-3 is placed in the opening of the insulating paper board 8-1, and the small sample 8-3 is fixed on the insulating paper board 8-1 by the polyimide adhesive tape 8-2 around the small sample 8-3;
the resistivity test platform comprises a resistivity test cavity shell 5, a resistivity test cavity 4, a high-voltage electrode 12, a measuring electrode 6, a protective electrode 7, a spring 14, a polytetrafluoroethylene sheath 9, a first epoxy resin block 16, a second epoxy resin block 13 and a nonmetal sheath 15;
the high-voltage electrode 12, the measuring electrode 6, the protective electrode 7, the spring 15, the polytetrafluoroethylene sheath 9, the first epoxy resin block 16, the second epoxy resin block 13 and the nonmetal sheath 15 are arranged inside the resistivity testing cavity 4, a first opening and a second opening are formed in the top of the resistivity testing cavity 4, the first opening and the second opening are respectively provided with the first epoxy resin block 16 and the second epoxy resin block 13 in a penetrating mode, a third opening is formed in the bottom of the resistivity testing cavity 4, the high-voltage electrode 12 is of a T-shaped structure, and the vertical end of the high-voltage electrode extends out of the resistivity testing cavity from the third opening;
the small sample piece to be measured is placed between the high-voltage electrode 12 and the measuring electrode 6, the measuring electrode 6 and the high-voltage electrode 12 act to press the small sample 8-3 of the small sample piece to be measured 8, the protective electrodes 7 are arranged on the left side and the right side of the measuring electrode 6 and act with the high-voltage electrode 6 to press the insulating paper board 8-1 of the small sample piece to be measured 8;
the protection electrode 7 is connected with the top of the resistivity cavity 4 through a polytetrafluoroethylene sheath 9 and is fixed with the polytetrafluoroethylene sheath 9 through a non-metal sheath 15, the polytetrafluoroethylene sheath 9 is arranged at the upper left and upper right of the resistivity test cavity 4 corresponding to the measuring electrode 6, the polytetrafluoroethylene sheath 9 is fixed at the top of the resistivity test cavity 4 through the non-metal sheath 15, one end of a spring 14 is fixed at the top of the measuring electrode 6, the other end of the spring is fixed at the upper end of the corresponding polytetrafluoroethylene sheath 9, and the bottom of the high-voltage electrode 12 is connected with the resistivity test cavity shell 5 through the polytetrafluoroethylene sheath 9;
the electrometer 2 is connected with host computer 1, and 16 tops of first epoxy piece are connected with electrometer 2, and the bottom is connected with measuring electrode 6 through lead wire 11, and the top of second epoxy piece 13 is connected with electrometer 2, and the bottom is connected with right side guard electrode 7 through lead wire 11, and the vertical end bottom of high voltage electrode 12 is connected with DC power supply power amplifier 3, and electrometer 2 ground connection.
In the embodiment of the invention, the small sample piece 8 to be tested is composed of an epoxy resin small sample 8-3 with the size of 7mm × 7mm × 2mm, an insulating paper board 8-1 with the size of 100mm × 100mm × 2mm and a polyimide adhesive tape 8-2, an opening with the size of 7mm × 7mm × 2mm is dug in the middle of the insulating paper board 8-1, the epoxy resin small sample 8-3 is placed in the center of the insulating paper board 8-1, and the joint of the epoxy resin small sample 8-3 and the insulating paper board 8-1 is sealed by the polyimide adhesive tape 8-2, so that the epoxy resin small sample 8-3 is fully contacted with the insulating paper board 8-1 and plays a certain fixing role. In practical applications, the small sample 8-3 may also be selected from other insulating materials, and the dimensions may also be selected from other dimensions, which are not specifically limited herein. The small sample piece 8 to be tested can exactly conform to the originally designed size of the tested resistivity, and the small sample piece is placed into the resistivity testing cavity 4 to fully ensure that the small sample piece is in a horizontal position in the resistivity test, so that the electrode can be fully contacted with the small sample 8-3, and errors caused by measuring the volume resistivity are reduced.
Resistivity test cavity shell 5 can select the shell of stainless steel material, and resistivity test cavity shell 5 bottom can set up supporting legs 10, and supporting legs 10 can be with resistivity test cavity shell 5 integrated design, also can be with resistivity test cavity shell 5 detachable design, for convenient removal transportation, supporting legs 10 bottom also can be provided with the universal wheel.
The spring 14 is arranged to make the guard electrode 7 and the measuring electrode 6 fully contact with the insulating paper 8-1 and the small sample 8-3 of the small sample piece 8 to be measured, respectively, and the current flowing through the guard electrode and the measuring electrode is just the current flowing through the measuring electrode 6 contacting with the small sample 8-3. The protective electrode 7 is in full contact with the insulating paper board 8-1, and the effect of leading out surface current is achieved. The protective electrode 7 and the measuring electrode 6 are designed according to the national standard, the outer side of the protective electrode 7 is fixed with the lead 11 and is led out of the resistivity insulation cavity 4 through the second epoxy resin block 14 which plays an insulation role. The high-voltage electrode 12 in the resistivity cavity 4 is connected with the power amplifier 3, the measuring electrode 6 of the resistivity testing cavity 4 is connected with the electrometer 2 through a lead wire of the first epoxy resin block 16, the electrometer 2 is a 6514 type editable electrometer, the electrometer 2 is connected with the upper computer 1 and matched with resistivity measuring software of the upper computer, and the upper computer 1 is a PC (personal computer) end. The polytetrafluoroethylene sheath 9 isolates the resistivity test cavity shell 5 from the protective electrode, the high-voltage electrode and the measuring electrode respectively, and the polytetrafluoroethylene sheath 9, the protective electrode, the high-voltage electrode and the measuring electrode are fixed to play a role in electrical insulation. The electrometer 2 and the dc power supply power amplifier 3 are grounded to the ground. The polytetrafluoroethylene sheath 9 connected between the protective electrode 7 and the resistivity test cavity shell 5 can adopt an inverted L-shaped structure, the polytetrafluoroethylene sheath 9 connected between the measuring electrode 6 and the resistivity test cavity shell 5 can adopt a T-shaped structure, and the polytetrafluoroethylene sheath 9 connected between the high-voltage electrode 12 and the resistivity test cavity shell 5 can adopt a rectangular structure.
When the sample high-voltage resistivity testing device provided by the embodiment of the invention is used for testing the resistivity of the small sample 8-3, firstly, the small sample piece 8 to be tested is placed between the high-voltage electrode 12 and the measuring electrode 6 in the resistivity testing cavity 4, certain pressure is applied through the spring 14 and acts for certain time, then the switch of the direct-current power supply power amplifier 3 is turned on, the voltage value is adjusted, the resistivity measuring software in the electrometer 2 and the upper computer 1 is turned on, the volume resistance detection value R of the small sample 8-3 is obtained, and then according to the thickness L of the small sample 8-3 and the effective area A of the measuring electrode 6, the formula is adopted
The volume resistivity p of the small sample 8-3 was calculated.
In one embodiment, the measuring electrode 6 is a 7mm diameter disk electrode that makes direct contact with the face of a small sample 8-3 having dimensions 7mm x 2mm, where the shortest creepage distance between the upper and lower electrodes is only 2mm of the height of the sample. An insulating paper board 8-1 is added to cover the small sample 8-3, so that the shortest creepage distance between the electrodes is changed from the original 2mm to 95mm (namely (50mm-3.5mm) × 2+2mm), and the creepage distance under the voltage meets the creepage distance requirement and the leakage current requirement of the sample resistivity test. The sample high-voltage resistivity testing device provided by the embodiment of the invention can bear the direct-current voltage of 6kV without surface creepage, and the sample high-voltage resistivity testing device is protected from generating harmful discharge when measuring the resistivity.
According to the sample high-voltage resistivity testing device provided by the embodiment of the invention, if the small sample 8-3 is required to carry out resistivity measurement under different field strengths, only the small sample 8-3 needs to be disassembled, the appropriate creepage distance along the surface is calculated, and the reasonably designed size of the insulating paper board 8-1 is spliced, so that the resistivity measurement under various different high field strengths can be met, and the applicability is wide.
The invention provides a sample high-voltage resistivity testing device, a small sample to be tested consists of an insulating paper board with an opening with a preset size dug in the middle, a small sample with a preset size and a polyimide adhesive tape, the small sample is attached to the opening of the insulating paper board through the polyimide adhesive tape, so that the small sample can also measure the volume resistivity, the creepage distance along the surface is increased by the insulating paper board, the leakage current is reduced, a spring can ensure that a protective electrode and a measuring electrode are fully contacted with the small sample to be tested, the flowing current is just the current flowing on the electrode contacted with the small sample, the protective electrode and the insulating paper board are fully contacted with each other, and the effect of leading out the surface current can be achieved, therefore, the sample high-voltage resistivity testing device provided by the invention provides a solution for the test of the resistivity of the small sample under the high electric field intensity, the method solves the technical problems that the traditional resistivity test method for the solid insulating material is easy to generate creepage along the surface and even cause creepage discharge to influence the test accuracy under the conditions of high voltage, large field intensity and small sample size.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. A sample high-voltage resistivity testing device, comprising:
the device comprises a small sample to be tested, an upper computer, an electrometer, a direct-current power supply power amplifier and a resistivity test platform;
the small sample piece to be measured comprises an insulating paper board with an opening with a preset size dug in the middle, a small sample with a preset size and a polyimide adhesive tape, wherein the small sample is placed in the opening of the insulating paper board, and the polyimide adhesive tape surrounds the periphery of the small sample and fixes the small sample on the insulating paper board;
the resistivity test platform comprises a resistivity test cavity shell, a resistivity test cavity, a high-voltage electrode, a measuring electrode, a protective electrode, a spring, a polytetrafluoroethylene sheath, a first epoxy resin block, a second epoxy resin block and a non-metal sheath;
the high-voltage electrode, the measuring electrode, the protective electrode, the spring, the polytetrafluoroethylene sheath, the first epoxy resin block, the second epoxy resin block and the nonmetal sheath are arranged in the resistivity test cavity, a first opening and a second opening are formed in the top of the resistivity test cavity, the first opening and the second opening are respectively provided with the first epoxy resin block and the second epoxy resin block in a penetrating mode, a third opening is formed in the bottom of the resistivity test cavity, the high-voltage electrode is of a T-shaped structure, and the vertical end of the high-voltage electrode extends out of the resistivity test cavity from the third opening;
the small sample piece to be measured is placed between the high-voltage electrode and the measuring electrode, the measuring electrode and the high-voltage electrode act to press the small sample of the small sample piece to be measured, the protective electrodes are arranged on the left side and the right side of the measuring electrode and act with the high-voltage electrode to press the insulating paper board of the small sample piece to be measured;
the protection electrode is connected with the top of the resistivity cavity through a polytetrafluoroethylene sheath and is fixed with the polytetrafluoroethylene sheath through a non-metal sheath, the polytetrafluoroethylene sheath is arranged at the upper left side and the upper right side of the resistivity testing cavity corresponding to the measuring electrode, the polytetrafluoroethylene sheath is fixed at the top of the resistivity testing cavity through the non-metal sheath, one end of the spring is fixed at the top of the measuring electrode, the other end of the spring is fixed at the upper end of the corresponding polytetrafluoroethylene sheath, and the bottom of the high-voltage electrode is connected with the resistivity testing cavity shell through the polytetrafluoroethylene sheath;
the electrometer is connected with the host computer, and first epoxy piece top is connected with the electrometer, and the bottom is passed through the lead wire and is connected with measuring electrode, and second epoxy piece top is connected with the electrometer, and the bottom is passed through the lead wire and is connected with right side guard electrode, and the vertical end bottom and the DC power supply power amplifier of high voltage electrode are connected, and the electrometer ground connection.
2. The apparatus for testing high voltage resistivity of a sample according to claim 1, wherein the small sample has a size of 7mm x 2mm, and the measuring electrode is a 7mm diameter disk electrode.
3. The apparatus for testing high voltage resistivity of a sample according to claim 1, wherein the insulating paper board has a size of 100mm x 2 mm.
4. The apparatus of claim 1, wherein the electrometer is a 6514 model editable electrometer.
5. The apparatus of claim 1, wherein the resistivity test chamber is made of stainless steel.
6. The high-pressure resistivity testing device for the sample as claimed in claim 5, wherein the resistivity testing chamber housing is integrally provided with supporting legs.
7. The apparatus for testing the high-voltage resistivity of the sample according to claim 6, wherein the bottom of the supporting leg is provided with a universal wheel which is detachably mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210663438.2A CN114859127A (en) | 2022-06-13 | 2022-06-13 | Sample high-voltage resistivity testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210663438.2A CN114859127A (en) | 2022-06-13 | 2022-06-13 | Sample high-voltage resistivity testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114859127A true CN114859127A (en) | 2022-08-05 |
Family
ID=82624497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210663438.2A Pending CN114859127A (en) | 2022-06-13 | 2022-06-13 | Sample high-voltage resistivity testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114859127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684273A (en) * | 2022-11-11 | 2023-02-03 | 中国工程物理研究院激光聚变研究中心 | High-temperature ultrahigh-precision electric transportation test system and test method thereof |
-
2022
- 2022-06-13 CN CN202210663438.2A patent/CN114859127A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115684273A (en) * | 2022-11-11 | 2023-02-03 | 中国工程物理研究院激光聚变研究中心 | High-temperature ultrahigh-precision electric transportation test system and test method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104620114B (en) | Voltage measuring apparatus with insulator | |
| JP3628244B2 (en) | Partial discharge detection method | |
| CN103257263B (en) | Contactless duplex frequency voltage measuring device | |
| US20180136263A1 (en) | Non-contact voltage measurement system using multiple capacitors | |
| US10605832B2 (en) | Sensor subsystems for non-contact voltage measurement devices | |
| CN114859127A (en) | Sample high-voltage resistivity testing device | |
| CN109459621A (en) | A kind of conductor floats current potential contactless measuring system | |
| US11137423B2 (en) | Contactless voltage transducer | |
| CN208999493U (en) | A kind of three electrode assemblies for the test of paper oil insulation dielectric response | |
| KR20220126381A (en) | Voltage measuring device for high voltage power equipment and high voltage power equipment with the same | |
| CN113324896A (en) | Experimental device for be used for high tension cable buffer layer electrochemical corrosion research that blocks water | |
| US6998832B1 (en) | High-voltage indicating apparatus and method | |
| KR20160088779A (en) | Apparatus for measuring electrical characteristics | |
| CN110542777B (en) | Three-phase integrated GIS independent bus voltage measuring device | |
| CN115616306B (en) | Surface charge collection system of low charge leakage | |
| US4441073A (en) | Resistivity sensor system for detecting faults in sealed gas-insulated electrical apparatus | |
| CN207908574U (en) | Contact net voltage non-contact type measuring device | |
| KR200169790Y1 (en) | An instrument for measuring earth resistance of concrete electric-pole | |
| Chavez et al. | Accurate voltage measurement with electric field sampling using permittivity-shielding | |
| CN114200262B (en) | High-voltage cable elbow terminal partial discharge and transient steady state voltage on-line measuring device | |
| JP3769119B2 (en) | Volume resistivity meter, liquid purity monitoring apparatus including the same, liquid resistivity measuring method, and liquid purity monitoring method using the same | |
| CN208443964U (en) | A kind of solid insulating material Inverter fed motor test device and Inverter fed motor tester | |
| CN106970325B (en) | Generator handbag insulation reverse wiring inspection device and method for high potential measurement | |
| CN112014618B (en) | Contact voltage detection device, grounding system and contact voltage detection method | |
| US2194303A (en) | Radio noise testing equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |