CN105353178A - Single-point movable grounding apparatus for extra-high voltage main transformation partial discharge test - Google Patents
Single-point movable grounding apparatus for extra-high voltage main transformation partial discharge test Download PDFInfo
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- CN105353178A CN105353178A CN201510886812.5A CN201510886812A CN105353178A CN 105353178 A CN105353178 A CN 105353178A CN 201510886812 A CN201510886812 A CN 201510886812A CN 105353178 A CN105353178 A CN 105353178A
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- Prior art keywords
- ground
- grounding
- metallic conductor
- grounded screen
- terminal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a single-point movable grounding apparatus for an extra-high voltage main transformation partial discharge test. The apparatus comprises a metal conductor for grounding, one surface of the metal conductor is provided with a grounding network wiring terminal connected with a test onsite grounding network, not more than six grounding terminals of discharged experiment equipment are arranged at equal intervals from the grounding network wiring terminal around the grounding network wiring terminal, the other surface of the metal conductor is provided with insulation pins, and the insulation pins are used for placing the metal conductor stably on the ground of a test field and insulating the metal conductor from the ground. According to the invention, equal-resistance grounding of single-point grounding during the extra-high voltage main transformation partial discharge test can be realized, the process of installing a grounding wire is simplified, the grounding reliability is improved, the time for mounting and dismounting the grounding wire is shortened, the onsite high-voltage test safety and the work efficiency are improved, and grounding points can be moved according to an experiment at the field.
Description
Technical field
The invention belongs to high-voltage earthing technology, particularly the removable earthing device of a kind of extra-high voltage main transformer partial discharge test single-point, is the removable single-point grounding device of multiple testing equipments of the stake resistances such as realization.
Background technology
In high-potting, main-transformer partial discharge test is the most important test carried out after main-transformer is installed, and has vital role to the latency defect caused in discovering device inside transport, installation process.And main-transformer partial discharge test is exchanged for 1000kV, because its electric pressure is high, in order to reduce the impact on test of surrounding environment and object, compared with conventional 500kV and following electric pressure equipment, its test has many particular/special requirements, and wherein ground wire single-point grounding is exactly one of them.Earth point is not fixed, and in order to reduce the undesired signal that ground loop may be introduced, the method that present situation is commonly used is employing grounding copper bar, then the common point of ground wire is all received on this copper bar, and fixes with bolt.More owing to testing used ground wire, this kind of way uses and wastes time and energy, and efficiency is low, dangerous, has also occurred the unequal problem of stake resistance simultaneously.
Summary of the invention
The object of the invention is to propose a kind of extra-high voltage main transformer partial discharge test single-point grounding device, need to accomplish single-point grounding when practice finds extra-high voltage main transformer partial discharge test.
To achieve these goals, technical scheme of the present invention is: the removable earthing device of a kind of extra-high voltage main transformer partial discharge test single-point, comprise a metallic conductor for ground connection, metallic conductor has two faces being parallel to each other opposing, metallic conductor face is provided with a grounded screen connection terminal be connected with testing ground grounded screen, wherein, arrange on the face of grounded screen connection terminal at described metallic conductor, around described grounded screen connection terminal, with described grounded screen connection terminal equidistant be provided with no more than 6 for being connected the ground terminal being discharged experimental facilities, another face of described metallic conductor is provided with insulation pin, insulation pin is used for metallic conductor to be steadily placed on ground, testing ground, and metallic conductor and ground are insulated.
Scheme is further: described insulation pin is rubber or plastic insulation pin, and be three rubber fixing in isosceles triangle or plastic column, the height of rubber or plastic column is not less than 10mm.
Scheme is further: described metallic conductor is rosette, and described grounded screen connection terminal is arranged on the center in a disk face, and described ground terminal is 6, and 6 ground terminals are symmetricly set on the edge of rosette around grounded screen connection terminal.
Scheme is further: described grounded screen connection terminal and ground terminal be one to hook bolt, described metallic conductor is screwed in a bolt head of hook bolt terminal is fixed on metallic conductor, have nut to another bolt head rotation set of hook bolt, nut is used for being inserted in the connection ground wire locking of another bolt head.
Scheme is further: scribble different pigment respectively at described grounded screen connection terminal and ground terminal, distinguish different connection terminals and ground terminal by different colors.
The invention has the beneficial effects as follows: the resistance eutral grounding such as grade that both can realize single-point grounding during extra-high voltage main transformer partial discharge test, and the process simplified when ground wire is installed, improve the reliability of ground connection, shorten dress, tear the time of ground wire open, improve field high-pressure test security and work efficiency, and can experimentally mobile grounding point at the scene.
Below in conjunction with drawings and Examples, invention is described in detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
The removable earthing device of a kind of extra-high voltage main transformer partial discharge test single-point, the removable earthing device of main transformer partial discharge test single-point of such as more than 1000kV.As shown in Figure 1, described device comprises a metallic conductor 1 for ground connection, metallic conductor has two faces 101 and 102 being parallel to each other opposing, metallic conductor face 101 is provided with a grounded screen connection terminal 2 be connected with testing ground grounded screen, wherein, arrange on the face 101 of grounded screen connection terminal at described metallic conductor, around described grounded screen connection terminal, no more than 6 ground terminals 3 are provided with described grounded screen connection terminal is equidistant, multiple ground terminal is for connecting underproof discharge test equipment ground, such as: test the intermediate transformer with needing ground connection to discharge, the equipment such as compensation reactor, be provided with insulation pin 4 in another face 102 of described metallic conductor, insulation pin is used for metallic conductor to be steadily placed on ground, testing ground, and metallic conductor and ground is insulated.
In embodiment: described insulation pin is rubber or plastic insulation pin, be three rubber or plastic column fixed in isosceles triangle, the height of rubber or plastic column is not less than 10mm.
In embodiment: the copper rosette of described metallic conductor to be diameter be 100mm, thickness is 10mm, described grounded screen connection terminal is arranged on the center in a disk face, and described ground terminal is 6, and 6 ground terminals are symmetricly set on the edge of rosette around grounded screen connection terminal.
In embodiment: reply diameter is the rosette of 100mm, thickness is the metallic conductor of 10mm, described grounded screen connection terminal and ground terminal be a M6 to hook bolt, a protruding line ball annulus 303 and 203 to the interlude of hook bolt, to a bolt of hook bolt, the M6 blind screwhole 102 that the described metallic conductor of 301 and 201 screw-in is arranged, terminal is fixed on metallic conductor, have nut 5 to another bolt head 302 and 202 rotation set of hook bolt, nut is used for being inserted in the connection ground wire locking of another bolt head.
In embodiment: scribble different pigment respectively at described grounded screen connection terminal and ground terminal, distinguish different connection terminals and ground terminal by different colors.
By the removable earthing device of above-described embodiment, the stake resistance that can realize single-point grounding during extra-high voltage main transformer partial discharge test is definitely equal, very important for Measurement accuracy parameter discharge time, and the process simplified when ground wire is installed, improve the reliability of ground connection, shorten dress, tear the time of ground wire open, improve field high-pressure test security and work efficiency, and can experimentally mobile grounding point at the scene.
Claims (5)
1. the removable earthing device of extra-high voltage main transformer partial discharge test single-point, comprise a metallic conductor for ground connection, metallic conductor has two faces being parallel to each other opposing, metallic conductor face is provided with a grounded screen connection terminal be connected with testing ground grounded screen, it is characterized in that, arrange on the face of grounded screen connection terminal at described metallic conductor, around described grounded screen connection terminal, with described grounded screen connection terminal equidistant be provided with no more than 6 for being connected the ground terminal being discharged experimental facilities, another face of described metallic conductor is provided with insulation pin, insulation pin is used for metallic conductor to be steadily placed on ground, testing ground, and metallic conductor and ground are insulated.
2. earthing device according to claim 1, is characterized in that, described insulation pin is rubber or plastic insulation pin, and be three rubber or plastic column fixed in isosceles triangle, the height of rubber or plastic column is not less than 10mm.
3. earthing device according to claim 1, it is characterized in that, described metallic conductor is rosette, and described grounded screen connection terminal is arranged on the center in a disk face, described ground terminal is 6, and 6 ground terminals are symmetricly set on the edge of rosette around grounded screen connection terminal.
4. the earthing device according to claim 1 or 2 or 3, it is characterized in that, described grounded screen connection terminal and ground terminal be one to hook bolt, described metallic conductor is screwed in a bolt head of hook bolt terminal is fixed on metallic conductor, have nut to another bolt head rotation set of hook bolt, nut is used for being inserted in the connection ground wire locking of another bolt head.
5. earthing device according to claim 1, is characterized in that, scribbles different pigment respectively, distinguish different connection terminals and ground terminal by different colors at described grounded screen connection terminal and ground terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886812.5A CN105353178A (en) | 2015-12-07 | 2015-12-07 | Single-point movable grounding apparatus for extra-high voltage main transformation partial discharge test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510886812.5A CN105353178A (en) | 2015-12-07 | 2015-12-07 | Single-point movable grounding apparatus for extra-high voltage main transformation partial discharge test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105353178A true CN105353178A (en) | 2016-02-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510886812.5A Pending CN105353178A (en) | 2015-12-07 | 2015-12-07 | Single-point movable grounding apparatus for extra-high voltage main transformation partial discharge test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105353178A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785080A (en) * | 2016-03-17 | 2016-07-20 | 许继（厦门）智能电力设备股份有限公司 | GIS current transformer high-voltage test secondary circuit tool |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002134988A (en) * | 2000-10-27 | 2002-05-10 | Nec Corp | Ground connection method |
| CN202133686U (en) * | 2011-06-30 | 2012-02-01 | 中机国际（西安）技术发展有限公司 | Grounding wiring board used for high voltage lab |
| CN203225358U (en) * | 2013-04-07 | 2013-10-02 | 国家电网公司 | A self-shielding grounding wire concentration apparatus used for extra-high-voltage tests |
| CN203465297U (en) * | 2013-09-17 | 2014-03-05 | 国家电网公司 | Grounding device for electrical testing |
| CN205374516U (en) * | 2015-12-07 | 2016-07-06 | 国家电网公司 | But extra -high voltage owner becomes single -point running ground device for partial discharge test |
-
2015
- 2015-12-07 CN CN201510886812.5A patent/CN105353178A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002134988A (en) * | 2000-10-27 | 2002-05-10 | Nec Corp | Ground connection method |
| CN202133686U (en) * | 2011-06-30 | 2012-02-01 | 中机国际（西安）技术发展有限公司 | Grounding wiring board used for high voltage lab |
| CN203225358U (en) * | 2013-04-07 | 2013-10-02 | 国家电网公司 | A self-shielding grounding wire concentration apparatus used for extra-high-voltage tests |
| CN203465297U (en) * | 2013-09-17 | 2014-03-05 | 国家电网公司 | Grounding device for electrical testing |
| CN205374516U (en) * | 2015-12-07 | 2016-07-06 | 国家电网公司 | But extra -high voltage owner becomes single -point running ground device for partial discharge test |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105785080A (en) * | 2016-03-17 | 2016-07-20 | 许继（厦门）智能电力设备股份有限公司 | GIS current transformer high-voltage test secondary circuit tool |
| CN105785080B (en) * | 2016-03-17 | 2018-09-04 | 许继（厦门）智能电力设备股份有限公司 | The secondary circuit tooling of GIS current transformer high-pottings |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160224 |
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| WD01 | Invention patent application deemed withdrawn after publication |