CN204479620U - Eliminate the anti-interference clamp specially of surface current - Google Patents
Eliminate the anti-interference clamp specially of surface current Download PDFInfo
- Publication number
- CN204479620U CN204479620U CN201520160402.8U CN201520160402U CN204479620U CN 204479620 U CN204479620 U CN 204479620U CN 201520160402 U CN201520160402 U CN 201520160402U CN 204479620 U CN204479620 U CN 204479620U
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- China
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- jig arm
- surface current
- coaxial cable
- test
- clamping jaw
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Abstract
The utility model discloses a kind of anti-interference clamp specially eliminating surface current, comprise tong bodies, clamping jaw and test splice structure, tong bodies comprises two the first jig arm and the second jig arm that are hinged, clamping jaw is two panels and is separately positioned on inside the clamping part of the first jig arm and the second jig arm, test splice structure comprises the surface current be arranged in insulation crust and to release joint and double shielded coaxial cable joint, double shielded coaxial cable joint is connected by conductor with clamping jaw, double shielded coaxial cable joint and surface current are released between joint and are insulated by insulating element, the anti-interference clamp specially of this elimination surface current is applied to and adopts double shielded coaxial cable as in the insulating medium electrical characteristics test of test channel, can effectively eliminate insulating surface leakage current and on-the-spot strong-electromagnetic field disturbs, guarantee that the accuracy of test result is with repeatable.
Description
Technical field
The utility model is applied to insulating medium response test field, is a kind of anti-interference Special connecting device for eliminating surface leakage current.
Background technology
Leakage current can be divided into volumetric leak electric current and surface leakage current two kinds.Insulation is in impressed voltage situation, and the electric current flowing into the earth or circuit peripheral current-carrying part along insulating surface is surface leakage current.The size of surface leakage current, depends mainly on the surface condition of testing apparatus, as surface wetting, dirty etc.If insulating inner does not have defect, and only surface wetting, in fact can't reduce its built-in electrical insulation intensity.Therefore in order to truly reflect insulating inner situation, in leakage current measurement, the main just volumetric leak electric current measured.But in actual measurement, surface leakage current is often greater than volumetric leak electric current, this gives analysis, judges that the state of insulation of tested device brings difficulty, thus must eliminate the impact of surface leakage current on true measurement.
In insulating medium response test, if insulating surface makes moist or surface filth, so surface leakage current will increase, and test findings will be made to produce very big error, in order to obtain more correct test findings, be necessary to adopt corresponding way to eliminate the impact of surface leakage current.
Summary of the invention
The purpose of this utility model is to provide a kind of being applied to adopt double shielded coaxial cable as in the insulating medium electrical characteristics test of test channel, be used for eliminating insulating surface leakage current and on-the-spot strong-electromagnetic field disturb, with the anti-interference clamp specially of the accuracy and repeated elimination surface current of guaranteeing test result.
For this reason, the technical solution of the utility model is as follows:
A kind of anti-interference clamp specially eliminating surface current, comprise tong bodies, described tong bodies comprises two the first jig arm and the second jig arm that are hinged, one end of described first jig arm and the second jig arm is gripping handle, the other end of described first jig arm and the second jig arm is provided with the clamping part of arc, the test splice structure also comprising clamping jaw and be arranged on outside described first jig arm and the second jig arm clamping part, described clamping jaw is two panels and is separately positioned on inside the clamping part of described first jig arm and the second jig arm, described test splice structure comprises the surface current be arranged in insulation crust and to release joint and double shielded coaxial cable joint, described double shielded coaxial cable joint is connected by conductor with described clamping jaw, described double shielded coaxial cable joint and described surface current are released between joint and are insulated by insulating element.
Described tong bodies adopts insulating material to make.Preferably, described tong bodies adopts elastic insulating material to make, afterburning fastening clamp.Described clamping jaw adopts metallic copper to make, and guarantees that electric test channel conductive is good.
Compared with prior art, the anti-interference clamp specially structure of this elimination surface current is simple, easy to use, be applied to and adopt double shielded coaxial cable as in the insulating medium electrical characteristics test of test channel, can effectively eliminate insulating surface leakage current and on-the-spot strong-electromagnetic field disturbs, guarantee that the accuracy of test result is with repeatable.
Accompanying drawing explanation
Fig. 1 is that surface leakage current is superimposed upon on Medium Measurement electric current and affects schematic diagram to response test;
Fig. 2 is the tan delta curve figure that in Medium Measurement, transformer current is subject to surface leakage current impact;
Fig. 3 is the structural representation of the anti-interference clamp specially of elimination surface current of the present utility model;
Fig. 4 is the anti-interference clamp specially principle of work schematic diagram of elimination surface current of the present utility model;
Fig. 5 is the tan delta curve figure after the anti-interference clamp specially using elimination surface current of the present utility model.
Embodiment
Be described in detail below in conjunction with the structure of accompanying drawing to the anti-interference clamp specially of elimination surface current of the present utility model.
As shown in Figure 1, when not adopting the anti-interference clamp specially of this elimination surface current, surface leakage current is superimposed upon on the measurement electric current of medium, affects the accuracy of test data.
Be illustrated in figure 2 the test result of the anti-interference clamp specially not adopting this elimination surface current, due to the superposition of surface leakage current, cause the test of transformer dielectric loss to occur abnormal negative dielectric loss, the complete distortion of test result.
As shown in Figure 3, the anti-interference clamp specially of this elimination surface current comprises tong bodies 1, described tong bodies 1 comprises two the first jig arm and the second jig arm that are hinged, one end of described first jig arm and the second jig arm is gripping handle 11, the other end of described first jig arm and the second jig arm is provided with the clamping part 12 of arc, it is characterized in that, the test splice structure 3 also comprising clamping jaw 2 and be arranged on outside described first jig arm and the second jig arm clamping part 12, described clamping jaw 2 is two panels and is separately positioned on inside the clamping part 12 of described first jig arm and the second jig arm, described test splice structure 3 comprises the surface current be arranged in insulation crust 31 and to release joint 32 and double shielded coaxial cable joint 33, described double shielded coaxial cable joint 33 is connected by conductor with described clamping jaw 2, described double shielded coaxial cable joint 33 and described surface current are released between joint 32 and are insulated by insulating element.Wherein, described tong bodies 1 adopts insulating material to make.Described clamping jaw 2 adopts metallic copper to make.
The use principle of the anti-interference clamp specially of this elimination surface current as shown in Figure 4, during use, by pressing gripping handle 11, described clamping part 12 is opened, described clamping jaw 2 is clamped on insulating medium, described current drain joint 32 is directly connected to ground by connecting line, and described double shielded coaxial cable joint 33 connects harvester by connecting line.
After adopting clamp specially, sleeve surface leakage current is connected to earth terminal through the surface current leakage path of clamp specially, the leakage current that test channel flows through reometer is volumetric leak electric current, no longer by the impact of surface leakage current, namely by devising the passage of a surface leakage current of releasing, the electric current flowing through reometer is made to only have the measuring current of insulating medium.The passage of this surface leakage current of releasing, not only for surface leakage current of releasing, also has shielding action to the strong-electromagnetic field at scene simultaneously, improves the anti-interference level of test.
After being illustrated in figure 5 the anti-interference clamp specially adopting this elimination surface current, transformer tan delta curve test result, eliminate the impact of surface leakage current, eliminate negative dielectric loss, obtain the interference that real tan delta curve also effectively shields on-the-spot electromagnetic field simultaneously, obtain truly smooth tan delta curve, improve the accuracy of dielectric response test curve, thus ensure that the accuracy of dielectric response on-the-spot test.
Claims (3)
1. eliminate the anti-interference clamp specially of surface current for one kind, comprise tong bodies (1), described tong bodies (1) comprises two the first jig arm and the second jig arm that are hinged, one end of described first jig arm and the second jig arm is gripping handle (11), the other end of described first jig arm and the second jig arm is provided with the clamping part (12) of arc, it is characterized in that, the test splice structure (3) also comprising clamping jaw (2) and be arranged on outside described first jig arm and the second jig arm clamping part (12), described clamping jaw (2) for two panels and be separately positioned on described first jig arm and the second jig arm clamping part (12) inner side, described test splice structure (3) comprises the surface current be arranged in insulation crust (31) and to release joint (32) and double shielded coaxial cable joint (33), described double shielded coaxial cable joint (33) is connected by conductor with described clamping jaw (2), described double shielded coaxial cable joint (33) and described surface current are released between joint (32) and are insulated by insulating element.
2. the anti-interference clamp specially of elimination surface current according to claim 1, is characterized in that, described tong bodies (1) adopts insulating material to make.
3. the anti-interference clamp specially of elimination surface current according to claim 1, is characterized in that, described clamping jaw (2) adopts metallic copper to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160402.8U CN204479620U (en) | 2015-03-21 | 2015-03-21 | Eliminate the anti-interference clamp specially of surface current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520160402.8U CN204479620U (en) | 2015-03-21 | 2015-03-21 | Eliminate the anti-interference clamp specially of surface current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204479620U true CN204479620U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520160402.8U Expired - Fee Related CN204479620U (en) | 2015-03-21 | 2015-03-21 | Eliminate the anti-interference clamp specially of surface current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204479620U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169520A (en) * | 2017-12-05 | 2018-06-15 | 广东电网有限责任公司东莞供电局 | A kind of novel electrode fixture for composite insulator umbrella skirt dielectric parameter measurement |
| CN112198339A (en) * | 2020-09-22 | 2021-01-08 | 国网天津市电力公司电力科学研究院 | A protection device exchanges analog input plug for laboratory |
-
2015
- 2015-03-21 CN CN201520160402.8U patent/CN204479620U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108169520A (en) * | 2017-12-05 | 2018-06-15 | 广东电网有限责任公司东莞供电局 | A kind of novel electrode fixture for composite insulator umbrella skirt dielectric parameter measurement |
| CN112198339A (en) * | 2020-09-22 | 2021-01-08 | 国网天津市电力公司电力科学研究院 | A protection device exchanges analog input plug for laboratory |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150715 Termination date: 20160321 |