CN201181327Y - High voltage standard dielectric loss device - Google Patents
High voltage standard dielectric loss device Download PDFInfo
- Publication number
- CN201181327Y CN201181327Y CNU2008200353728U CN200820035372U CN201181327Y CN 201181327 Y CN201181327 Y CN 201181327Y CN U2008200353728 U CNU2008200353728 U CN U2008200353728U CN 200820035372 U CN200820035372 U CN 200820035372U CN 201181327 Y CN201181327 Y CN 201181327Y
- Authority
- CN
- China
- Prior art keywords
- dielectric loss
- resistance
- standard
- capacitor
- high pressure
- 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.)
- Expired - Lifetime
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- 238000012216 screening Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 description 9
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model discloses a device used for detecting an automatic dielectric loss measurement apparatus by adopting a method of the variable capacity. The device comprises a standard capacitor Cn with the rated voltage being 10 kV and a resistor R, wherein the standard capacitor Cn and the resistor R are connected in series; two terminals are respectively arranged at two ends of the standard capacitor Cn and the resistor R; the resistor comprises at least two resistors with different resistance values and a transfer switch K; and the transfer switch can switch over the dielectric loss within different measurement ranges.
Description
Technical field:
The utility model relates to a kind of device that detects automated media loss test instrument in the electric system.Belong to electric system high pressure measurement detection technique field.
Background technology:
Electric system at present is extensive use of dielectric loss angle tan δ value and the electric capacity that automated media loss test instrument is measured high pressure equipment such as power transformer, voltage transformer (VT), current transformer, cable, power capacitor.For the periodic verification of these measuring instruments, guarantee that the accuracy of using is frequent and trickle work of metrological service.Press DL/T 962--2005 " high-pressure medium loss test instrument general technical specifications " regulation, if can have a cover to be used for the device of verification automated media loss test instrument, just can play a multiplier effect, we are referred to as high pressure standard dielectric loss device with this device.
The at present domestic high pressure standard dielectric loss device that only has employing 100pF (pico farad) electric capacity shelves to detect, still none family's calibration, calibrating unit adopt the method for variable capacitance that the dielectric loss tester is examined and determine, and make the calibration operation of high-pressure medium loss test instrument have big defective.
Summary of the invention:
The utility model the problem that will solve be exactly the high pressure measurement pick-up unit that a kind of method that adopts variable capacitance of design detects automated media loss test instrument.
For realizing above purpose, the utility model takes following technical scheme to realize:
High pressure standard dielectric loss device is in series by rated voltage standard capacitor Cn that is 10KV and resistance R and forms.High-pressure side when holding the Hv end that joins to use for the positive connection of automated media loss instrument with standard capacitor Cn, measuring junction when the Cx end that joins with resistance terminal uses for the positive connection of automated media loss measurent instrument, the high-pressure side when also the using measuring junction of holding concurrently for automated media loss measurent instrument reversal connection collimation method; Wherein active component is provided with the resistance and the switch K of at least two different resistance values, and switch K can switch the dielectric loss amount of different ranges.Resistance and corresponding range selector are selected 9 groups for use among Fig. 2.
Can calculate the value of different dielectric loss angle tan δ with following formula according to different resistance values.
tanδ＝2πfRC
Can obtain the numerical parameter of standard capacitor Cn, each resistance R by following step:
1, after choosing dielectric material, earlier measure DIELECTRIC CONSTANT in detail, require its accuracy of measurement reach ± 0.05%.Form simple and easy capacity plate antenna with stainless steel materials by certain area, anode-cathode distance is 1mm, and medium is an air.Measure its electric capacity C1 with the corresponding electric bridge 3 that can guarantee accuracy of measurement.Then, be placed between two pole plates, record its electric capacity C2 once more, can be similar to so and think with the thick dielectric material of 1mm:
ε＝C2/C1
2, structural designs such as each grade of accurate Calculation capacitance (C12) corresponding electrode physical dimension, anode-cathode distance, insulated column, connecting column.
3, accurately measure distributed capacitance C20.
4, the respective resistivity values of each grade of primary Calculation tan δ nominal value.
5,, debug out the actual required resistance value of each grade t an δ nominal value at last in conjunction with distributed capacitance C20.
6, take shielding measure, eliminate other spuious distributed capacitance influence.
7, select the little and high voltage bearing range selector of distributed capacitance for use.
8, capacitor is carried out withstand voltage, moistureproof PROCESS FOR TREATMENT.
9, resistor being carried out artificial ageing handles.
A cabinet 4 and internal layer shielding are installed in the outside of said apparatus, are provided with insulation pin 5 in the bottom of cabinet.
The device that the above-mentioned method of utilizing variable capacitance is examined and determine the dielectric loss tester has been replenished the blank in the calibration operation of high-pressure medium loss test instrument, and this work of giving has brought very big facility.
Description of drawings:
Fig. 1 is the system construction drawing of high pressure standard dielectric loss device
Fig. 2 is a high pressure standard dielectric loss device main circuit diagram
Embodiment:
High pressure standard dielectric loss device shown in Fig. 1-2, the high pressure standard dielectric loss device of 1000pF is a standard capacitor of selecting 1000pF for use, capacitor is to adopt coaxial structure, high-pressure stage, measures the utmost point and screening electrode all center on an axle center installation, in fill SF
6(sulfur hexafluoride) gas makes capacitor have high stability, is not subjected to the influence of temperature and humidity substantially; Resistance adopts high-power high voltage resistance, and it has characteristics such as high pressure resistant, high-power, good stability, and resistance can be set to 9, is respectively R1 to R9; Range shift switch is selected little, the high voltage bearing range selector of distributed capacitance for use, and uses and to cover ag material, makes switch very little contact resistance be arranged, move resistance and very little distributed capacitance again.Said structure makes equipment set have stable electric capacity and dielectric loss amount, and it is not subjected to the influence of temperature, humidity, voltage height.Automated media loss test instrument all is consistent with positive connection with reversal connection line measurement data.
The high pressure standard dielectric loss device of 10000pF is a polypropylene capacitor of selecting 10000pF for use, and the capacitor that the polypropylene insulation material is worked as medium has characteristics such as temperature coefficient is less, dielectric loss angle is less; Resistance adopts high-power high voltage resistance, and it has characteristics such as high pressure resistant, high-power, good stability, and resistance can be set to 9, is respectively R1 to R9; Range shift switch is selected little, the high voltage bearing range selector of distributed capacitance for use, and uses and to cover ag material, makes switch very little contact resistance be arranged, move resistance and very little distributed capacitance again.Said structure makes equipment set have stable electric capacity and dielectric loss amount, and it is not subjected to the influence of temperature, humidity, voltage height.Automated media loss test instrument all is consistent with positive connection with reversal connection line measurement data.
The foregoing description limits the utility model never in any form, and all employings are equal to the technical scheme that mode obtained of replacement or equivalent transformation, all drop within the protection domain of the present utility model.
Claims (6)
1. high pressure standard dielectric loss device, comprise standard capacitor Cn and resistance R that a rated voltage is 10KV, and both are in series, high-pressure side when holding the Hv end that joins to use for the positive connection of automated media loss instrument with standard capacitor Cn, measuring junction when the Cx end that joins with resistance uses for the positive connection of automated media loss measurent instrument, high-pressure side when also the using measuring junction of holding concurrently for automated media loss measurent instrument reversal connection collimation method, it is characterized in that active component is provided with the resistance and the switch K of at least two different resistance values, switch K can switch the dielectric loss amount of different ranges.
2. high pressure standard dielectric loss device according to claim 1, it is characterized in that: standard capacitor Cn is the standard capacitor of 1000pF, standard capacitor is to adopt coaxial structure, high-pressure stage, measures the utmost point and screening electrode all center on an axle center installation, in fill SF
6Gas.
3. high pressure standard dielectric loss device according to claim 1, it is characterized in that: standard capacitor Cn is the polypropylene capacitor of 10000pF.
4 according to claim 1,2 or 3 described high pressure standard dielectric loss devices, it is characterized in that: resistance adopts high-power high voltage resistance; Range shift switch is selected the little and high voltage bearing range selector of distributed capacitance for use, and selects for use and cover ag material.
5. according to claim 1,2 or 3 described high pressure standard dielectric loss devices, it is characterized in that: described resistance is 9, is respectively RI to R9.
6. according to the described high pressure standard of claim 4 dielectric loss device, it is characterized in that: described resistance is 9, is respectively RI to R9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200353728U CN201181327Y (en) | 2008-04-30 | 2008-04-30 | High voltage standard dielectric loss device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200353728U CN201181327Y (en) | 2008-04-30 | 2008-04-30 | High voltage standard dielectric loss device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181327Y true CN201181327Y (en) | 2009-01-14 |
Family
ID=40250826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200353728U Expired - Lifetime CN201181327Y (en) | 2008-04-30 | 2008-04-30 | High voltage standard dielectric loss device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201181327Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313876A (en) * | 2010-07-05 | 2012-01-11 | 河南电力试验研究院 | Calibrating device for fully automated high-voltage dielectric loss tester |
| CN102621513A (en) * | 2012-04-10 | 2012-08-01 | 辽宁省电力有限公司抚顺供电公司 | Calibration standard device for portable dielectric loss testers |
| CN107167754A (en) * | 2017-06-19 | 2017-09-15 | 国网辽宁省电力有限公司抚顺供电公司 | Portable medium angle of loss criteria check device |
| CN109581264A (en) * | 2019-01-08 | 2019-04-05 | 任守华 | A kind of capacitance and dielectric loss standard |
-
2008
- 2008-04-30 CN CNU2008200353728U patent/CN201181327Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313876A (en) * | 2010-07-05 | 2012-01-11 | 河南电力试验研究院 | Calibrating device for fully automated high-voltage dielectric loss tester |
| CN102313876B (en) * | 2010-07-05 | 2013-07-10 | 河南省电力公司电力科学研究院 | Calibrating device for fully automated high-voltage dielectric loss tester |
| CN102621513A (en) * | 2012-04-10 | 2012-08-01 | 辽宁省电力有限公司抚顺供电公司 | Calibration standard device for portable dielectric loss testers |
| CN107167754A (en) * | 2017-06-19 | 2017-09-15 | 国网辽宁省电力有限公司抚顺供电公司 | Portable medium angle of loss criteria check device |
| CN109581264A (en) * | 2019-01-08 | 2019-04-05 | 任守华 | A kind of capacitance and dielectric loss standard |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102650685B (en) | Method for assessing technical parameters of TEV (Transient Earth Voltage) partial discharge testing instruments for power systems | |
| CN201654130U (en) | Automatic measuring and calibrating device of high-impedance measuring apparatus | |
| CN103954896A (en) | Oiled paper insulation partial discharge inception voltage test system | |
| CN201181327Y (en) | High voltage standard dielectric loss device | |
| US20110215828A1 (en) | Test method for passive device embedded printed circuit board | |
| CN102759690A (en) | Method for judging insulation aging degrees of alternating current (AC) cables | |
| CN106030738B (en) | For monitoring the method and apparatus of the condenser-type terminal for three-phase AC grid | |
| CN103278753A (en) | Device for induced voltage tests on transformers | |
| CN111289858A (en) | Method for judging partial discharge inside transformer | |
| CN210119558U (en) | Program-controlled pulse current method partial discharge tester calibration system | |
| CN203249991U (en) | Device applied to transformer induction voltage test | |
| JP7152411B2 (en) | Method and apparatus for monitoring capacitor bushings for AC power networks | |
| CN106546940A (en) | A kind of field testing procedure of optical voltage transformer | |
| CN115774173B (en) | Device and method for evaluating insulation performance of dry-type transformer | |
| Smith et al. | The modelling of electric field, capacitance and dissipation factor of a high voltage bushing over varying frequency | |
| CN110412328B (en) | Combined electronic transformer for distribution transformer and measuring system | |
| CN106771623A (en) | The test device of insulating materials resistance and resistivity under a kind of hot environment | |
| CN1048555C (en) | L, C testing circuit and multi-parameter measurer thereof | |
| CN106443549A (en) | Analog alternating current resistance device for calibrating battery internal resistance tester | |
| CN204203445U (en) | Measuring equipment rolling inspection device | |
| CN115184854A (en) | Calibration method of high-voltage dielectric loss tester | |
| CN204855770U (en) | Concrete resistivity apparatus calibrating device | |
| CN2532487Y (en) | metallized film tester | |
| CN101839947B (en) | Measurement method of parasitic inductance of capacitor | |
| CN204287463U (en) | A kind of three-phase four-wire system standard potential transformer secondary load modifying device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ELECTRIC POWER CO. STATE ELECTRIC NET CROP Effective date: 20121024 Owner name: ELECTRIC POWER RESEARCH INSTITUTE, JIANGSU ELECTRI Free format text: FORMER OWNER: JIANGOU PROVINCIAL POWER TEST INST CO., LTD. Effective date: 20121024 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121024 Address after: 210036 Fenghuang West Street, Jiangsu, Nanjing, China, No. 243 Patentee after: Electric Power Research Institute of Jiangsu Electric Power Company Patentee after: Jiangsu Electric Power Company Patentee after: State Grid Corporation of China Address before: 210036 Fenghuang West Street, Jiangsu, Nanjing, China, No. 243 Patentee before: Jiangou Provincial Power Test Inst Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20090114 |
|
| CX01 | Expiry of patent term |