CN205157715U - Casing surface leakage current shields instrument - Google Patents
Casing surface leakage current shields instrument Download PDFInfo
- Publication number
- CN205157715U CN205157715U CN201520865412.1U CN201520865412U CN205157715U CN 205157715 U CN205157715 U CN 205157715U CN 201520865412 U CN201520865412 U CN 201520865412U CN 205157715 U CN205157715 U CN 205157715U
- Authority
- CN
- China
- Prior art keywords
- leakage current
- instrument
- surface leakage
- telescopic band
- sleeve surface
- 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 - Fee Related
Links
- 238000012360 testing method Methods 0.000 claims abstract description 45
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 16
- 238000005259 measurement Methods 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 3
- 238000000605 extraction Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 229940052961 longrange Drugs 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
Abstract
The utility model relates to a casing surface leakage current shields instrument, including current -guiding ring, microammeter and test instrument, current -guiding ring places double -deck electrically conductive telescopic band in and is connected with the electrically conductive telescopic band of bilayer including double -deck electrically conductive telescopic band and conductive spring in, and the outside of double -deck electrically conductive telescopic band is equipped with a binding post, and binding post is connected through drainage line and microammeter, and the microammeter still is connected with the test instrument electricity. Use this shielding instrument can efficient extraction casing surface leakage current, prevent its test loop who flows in test instrument, avoid surperficial leakage current to test data's influence, master the true situation of insulation of the equipment of awaiting measuring. Simultaneously, the long -range receipt data of this equipment accessible bluetooth have ensured measurement personnel's operation safety, treat the check out test set not damaged simultaneously, and have saved on -the -spot operating time, have improved work efficiency.
Description
Technical field
The utility model relates to a kind of sleeve surface leakage current screen instrument, and particularly the shielding instrument of the equipment casing surface leakage current such as transformer, lightning arrester, mutual inductor, belongs to electric power checkout equipment technical field.
Background technology
In the commissioning test and routine test of the equipment such as transformer, lightning arrester, mutual inductor, all need to carry out insulation resistance or DC current test to equipment casing.During test, the electric current I that testing tool obtains comprises the volumetric energy I through device interior
1with the surface leakage current I of equipment surface
2, wherein volumetric energy I
1consersion unit built-in electrical insulation situation, when ageing equipment is serious, volumetric energy I
1can increase.Surface leakage current I
2by equipment surface cleanliness, humidity effect, have nothing to do with apparatus insulated situation, belong to the distracter of test.When equipment surface is moist or have filth, the surface leakage current I of equipment
2can much larger than volumetric energy I
1if do not eliminate I
2interference, the accuracy of test result can be had a strong impact on.
At present, the method of shielded surfaces leakage current is wound around plain conductor at sleeve surface also to connect on side, surface leakage current is introduced plain conductor, it is avoided to flow into testing tool, thus realize shielding, this method has following shortcoming: the plain conductor that (1) is wound around can not be fitted in sleeve surface completely, has during loosening phenomenon and affects test result; (2) plain conductor surface is jagged, can scratch sleeve surface insulating material, affect apparatus insulated performance when being wrapped in sleeve surface; (3) use plain conductor to be wound around and need execute-in-place, workload is large, wastes time and energy.
Utility model content
For the deficiencies in the prior art, the utility model provides a kind of sleeve surface leakage current screen instrument.
The technical solution of the utility model is as follows:
A kind of sleeve surface leakage current screen instrument, comprise draining ring, microampere meter and testing tool, described draining ring comprises bilayer conductive telescopic band and power spring, power spring to be built in bilayer conductive telescopic band and to be connected with bilayer conductive telescopic band, the outside of bilayer conductive telescopic band is provided with a connection terminal, connection terminal is connected with microampere meter by drainage thread, and microampere meter is also electrically connected with testing tool.
Preferably, described power spring is copper spring.Copper spring conductive effect is good, ensures the accuracy of testing result to the full extent.
Preferably, the flexible diameter of described draining ring is 5 ~ 40cm.The benefit of this design is, diameter 5cm under draining ring state of nature, 40cm under maximum tension degree, and when can ensure most of 220kV and use with running casing, draining ring is in elastic stretching state, neither damages draining ring, can ensure again to test effect.
Preferably, the spring wire diameter of described copper spring is 1mm-5mm.
Preferably, the spring wire diameter of described copper spring is 2mm.
Preferably, described draining ring comprises five copper springs, and five copper springs are laid in bilayer conductive telescopic band.
Preferably, described shielding instrument also comprises CC254x type Bluetooth Receiver, and described microampere meter is GSWB-GI type high voltage direct current microampere meter.The benefit of this design is, the signal output terminal of GSWB-GI type high voltage direct current microampere meter is connected with Bluetooth Receiver, composition wireless transmission microampere meter, facilitate the hand-held Bluetooth Receiver of testing staff, and away from applied voltage test district, ensure the security of testing staff, facilitate observation and the record of data simultaneously.
Preferably, described testing tool is ZVI-200 type high voltage direct current tester.
During use, the operating process of this sleeve surface leakage current screen instrument is as follows:
(1) draining ring is enclosed within sleeve upper end first to be measured or second full skirt surface, guarantees that draining ring is in elastic stretching state;
(2) connection terminal outside draining ring connects a drainage thread, drainage thread is connected on surveying instrument ground terminal through microampere meter;
(3) carry out applied voltage test to sleeve pipe to be measured, the hand-held Bluetooth Receiver of testing crew reads surface leakage current value by the data receiving microampere meter;
(4) read test instrument current values, after measurement, after fully discharging, takes off shielding instrument to sleeve pipe to be measured.
The beneficial effects of the utility model are:
1. use shielding instrument can effective extraction tube surface leakage current, prevent it from flowing into the test loop of testing tool, avoid surface leakage current on the impact of test data, the insulation real conditions of grasp Devices to test.
2. this shielding instrument can Measurement accuracy surface leakage current, and reflection equipment surface is moist, filthy situation, and for overhaul of the equipments provides authentic data, tester can wireless reception related data, and security is high.
3. draining ring closely can wrap up sleeve surface, draining ring smooth outer surface, to sleeve surface material without damage, does not affect the insulating property of equipment and materials.
4. this shielding instrument gross weight 2kg, volume is little, lightweight, is easy to carry, and meets site test requirement, improves detection efficiency, save the time.
Accompanying drawing explanation
Fig. 1 is the structural representation of draining ring in the utility model;
Fig. 2 is the using state figure of the utility model shielding instrument;
Wherein: 1, power spring; 2, bilayer conductive telescopic band; 3, connection terminal; 4, microampere meter; 5, testing tool; 6, Bluetooth Receiver; 7, Devices to test; 8, drainage thread.
Embodiment
Also by reference to the accompanying drawings the utility model is described further below by embodiment, but is not limited thereto.
Embodiment 1:
As depicted in figs. 1 and 2, a kind of sleeve surface leakage current screen instrument, comprise draining ring, microampere meter 4 and testing tool 5, wherein, draining ring comprises bilayer conductive telescopic band 2 and power spring 1, and power spring 1 to be built in bilayer conductive telescopic band 2 and to be connected with bilayer conductive telescopic band 2, and the outside of bilayer conductive telescopic band 2 is provided with a connection terminal 3, connection terminal 3 is connected with microampere meter 4 by drainage thread 8, and microampere meter 4 is also electrically connected with testing tool 5.
In the present embodiment, power spring 1 is copper spring, and the spring wire of copper spring, through can be 1mm-5mm, elects 2mm as in the present embodiment, and copper spring conductive effect is good, ensures the accuracy of testing result to the full extent.
The flexible diameter of draining ring is 5 ~ 40cm.Diameter 5cm under draining ring state of nature, 40cm under maximum tension degree, when can ensure most of 220kV and use with running casing, draining ring is in elastic stretching state, neither damages draining ring, can ensure again to test effect.
Draining ring comprises five copper springs, is laid in side by side in bilayer conductive telescopic band about five copper springs.Testing tool is the ZVI-200 type high voltage direct current tester that Suzhou Hai Wo company produces.
Embodiment 2:
A kind of sleeve surface leakage current screen instrument, as described in Example 1, its difference is structure: this shielding instrument also comprises CC254x type Bluetooth Receiver, and microampere meter is GSWB-GI type high voltage direct current microampere meter.
The signal output terminal of GSWB-GI type high voltage direct current microampere meter is connected with Bluetooth Receiver, composition wireless transmission microampere meter, facilitates the hand-held Bluetooth Receiver of testing staff, and away from applied voltage test district, ensure the security of testing staff, facilitate observation and the record of data simultaneously.
As shown in Figure 2, utilize the using method that the sleeve surface leakage current screen instrument described in the present embodiment detects bushing shell for transformer, its operating process is as follows,
(1) draining ring is enclosed within sleeve upper end first to be measured or second full skirt surface, guarantees that draining ring is in elastic stretching state;
(2) connection terminal 3 outside draining ring connects a drainage thread 8, drainage thread 8 is connected on ZVI-200 type high voltage direct current tester 5 ground terminal through GSWB-GI type high voltage direct current microampere meter 4;
(3) carry out applied voltage test to sleeve pipe to be measured, testing crew hand-held CC254x type Bluetooth Receiver 6 reads surface leakage current value by the data receiving GSWB-GI type high voltage direct current microampere meter 4;
(4) read ZVI-200 type high voltage direct current tester 5 current values, after measurement, after sleeve pipe to be measured is fully discharged, take off shielding instrument.
Claims (8)
1. a sleeve surface leakage current screen instrument, it is characterized in that, comprise draining ring, microampere meter and testing tool, described draining ring comprises bilayer conductive telescopic band and power spring, power spring to be built in bilayer conductive telescopic band and to be connected with bilayer conductive telescopic band, the outside of bilayer conductive telescopic band is provided with a connection terminal, and connection terminal is connected with microampere meter by drainage thread, and microampere meter is also electrically connected with testing tool.
2. sleeve surface leakage current screen instrument as claimed in claim 1, it is characterized in that, described power spring is copper spring.
3. sleeve surface leakage current screen instrument as claimed in claim 1, it is characterized in that, the flexible diameter of described draining ring is 5 ~ 40cm.
4. sleeve surface leakage current screen instrument as claimed in claim 2, it is characterized in that, the spring wire diameter of described copper spring is 1mm-5mm.
5. sleeve surface leakage current screen instrument as claimed in claim 2, it is characterized in that, the spring wire diameter of described copper spring is 2mm.
6. sleeve surface leakage current screen instrument as claimed in claim 2, it is characterized in that, described draining ring comprises five copper springs, and five copper springs are laid in bilayer conductive telescopic band.
7. sleeve surface leakage current screen instrument as claimed in claim 1, it is characterized in that, described shielding instrument also comprises CC254x type Bluetooth Receiver, and described microampere meter is GSWB-GI type high voltage direct current microampere meter.
8. sleeve surface leakage current screen instrument as claimed in claim 1, it is characterized in that, described testing tool is ZVI-200 type high voltage direct current tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520865412.1U CN205157715U (en) | 2015-11-02 | 2015-11-02 | Casing surface leakage current shields instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520865412.1U CN205157715U (en) | 2015-11-02 | 2015-11-02 | Casing surface leakage current shields instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205157715U true CN205157715U (en) | 2016-04-13 |
Family
ID=55693394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520865412.1U Expired - Fee Related CN205157715U (en) | 2015-11-02 | 2015-11-02 | Casing surface leakage current shields instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205157715U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182206A (en) * | 2015-11-02 | 2015-12-23 | 国网山东省电力公司聊城供电公司 | Sleeve surface leakage current shielding tool and application thereof |
-
2015
- 2015-11-02 CN CN201520865412.1U patent/CN205157715U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182206A (en) * | 2015-11-02 | 2015-12-23 | 国网山东省电力公司聊城供电公司 | Sleeve surface leakage current shielding tool and application thereof |
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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 |
Granted publication date: 20160413 Termination date: 20161102 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |