CN203433045U - Ground resistance test device - Google Patents
Ground resistance test device Download PDFInfo
- Publication number
- CN203433045U CN203433045U CN201320529558.XU CN201320529558U CN203433045U CN 203433045 U CN203433045 U CN 203433045U CN 201320529558 U CN201320529558 U CN 201320529558U CN 203433045 U CN203433045 U CN 203433045U
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- CN
- China
- Prior art keywords
- test
- ground
- cables
- subtest
- stake
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- Expired - Fee Related
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 13
- 239000004411 aluminium Substances 0.000 claims description 8
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000012423 maintenance Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
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Abstract
A ground resistance test device comprises a ground resistance tester and two auxiliary test columns, and also comprises three test cables and a plurality of aluminum armor tapes. One ends of the three test cables are connected with the ground resistance tester, the other end of one test cable of the three test cables is connected with a tested ground stud, and the other ends of the other two test cables are connected with the wiring terminals of the two auxiliary test columns respectively. The aluminum armor tapes are wound at the connection positions of the wiring terminals of the auxiliary test columns and the test cables. According to the utility model, a conventional method of clamping the wire clamps with the test cables on the wiring terminals of the auxiliary ground studs directly is abandoned, but the test cables are wound on the wiring terminals of the auxiliary ground studs and then are bound and fixed by the aluminum armor tapes, so that the contact resistance among the test cables and the auxiliary ground studs is reduced, the test accuracy of the ground resistance is improved, and the potential safety hazards of the operation and maintenance of a power distribution network caused by the ground faults are eliminated.
Description
Technical field
The utility model relates to a kind of resistance testing device, specifically a kind of earth resistance device.
Background technology
Earth resistance is the big event that power engineering is checked and accepted, checked, measures.Whether the connection of the grounded screen of whole distribution engineering is reliable, and whether ground connection is good, affects power supply quality.If stake resistance resistance is excessive or ground wire disconnection fault occurs, will cause equipment burnout due to abnormal electrical power supply, even personal safety is caused to danger; Excessive when stake resistance resistance, simultaneously substation transformer, arrester ground resistance are also excessive, and while there is Lightning Over-voltage, lightning arrester can not normally discharge over the ground, will cause lightning arrester or Distribution Transformer Burning; The less diffusing of stake resistance is faster, and the time that after thunderbolt, noble potential keeps is just short, and dangerous just little, protected object is just safer.Therefore, it is extremely important that high pressure industry expands examination earth resistance accuracy rate, is related to personnel, equipment, power grid security.
In order to guarantee the good earth of equipment, the test of power engineering stake resistance at present mainly utilizes instrument to carry out in-site measurement to stake resistance by inspector, and conventional surveying instrument is hand-rail type ground resistance table.Hand-rail type ground resistance table is a kind of comparatively traditional measurement instrument, and its ultimate principle is to adopt bikini voltage drop method.Its measurement means is to squeeze into two subtest stakes on the ground in tested ground wire grounded stake (being called X) side, require these two detective poles to be positioned at the same side of tested pile, three substantially point-blank, apart from a nearer subtest stake (being called Y) the distance 20 meters of left and right of tested pile of tested pile, apart from a tested pile subtest stake (being called Z) distance 40 meters of left and right of tested pile far away.During test, rotational speed crank on request, tester produces electric energy by inner magnet motor, between tested pile X and subtest stake Z far away, pass into electric current, now between tested pile X and auxiliary pile Y, can obtain a voltage, instrument, by measuring this electric current and magnitude of voltage, can calculate the ground resistance of tested ground stud.But, when actual measurement stake resistance, because the wire clamp of p-wire is connected insecure or subtest stake surface corrosion with subtest stake, seriously cause loose contact, therefore cause the accuracy rate of earth resistance data not high, brought potential safety hazard to power distribution network O&M.
Utility model content
For above-mentioned deficiency, the utility model provide a kind of simple to operate, test earth resistance device accurately.
For addressing the above problem, the utility model is by the following technical solutions: a kind of earth resistance device, comprise ground resistance tester and two subtest stakes, it is characterized in that, also comprise three test cables and some aluminium armor tapes, one end of three described test cables is connected with ground resistance tester, the other end of a test cable in described three is connected with tested ground stud, the other end of all the other two test cables in described three is connected with the binding post of two subtest stakes respectively, on the binding post of described subtest stake, be wound with aluminium armor tape with test cable junction.
Preferably, described test cable is intertwined and connected on the binding post of subtest stake.
Preferably, described test cable is welded on the binding post of subtest stake.
Preferably, described ground resistance tester comprises digital earth resistance tester.
Preferably, described ground resistance tester comprises hand-rail type earth resistance tester.
The beneficial effects of the utility model are: the utility model has been abandoned and directly the wire clamp with test cable has directly been clipped in to the classic method on auxiliary earth stake binding post, after test cable is wrapped on auxiliary earth stake binding post, with aluminium armor tape, bundle again fixing, reduced like this contact resistance between test cable and auxiliary earth stake, improve the test accuracy rate of stake resistance, eliminated the power distribution network O&M potential safety hazard causing due to earth fault.
Accompanying drawing explanation
Fig. 1 is not structural representation during winding aluminum band of the utility model;
Structural representation when Fig. 2 is the utility model winding aluminum band;
In figure, 1 ground resistance tester, 2 first subtest stakes, 3 second subtest stakes, 4 test cables, 5 aluminium armor tapes, 6 tested ground studs.
Embodiment
As depicted in figs. 1 and 2, a kind of earth resistance device of the present utility model, it comprises ground resistance tester 1, the first subtest stake 2, the second subtest stake 3, article three, test cable 4 and some aluminium armor tapes 5, one end of three described test cables 3 is connected with ground resistance tester 1, the other end of a test cable in described three is connected with tested ground stud 6, the other end of all the other two test cables is intertwined and connected with the binding post of the first subtest stake 2 and the second subtest stake 3 respectively, on the binding post of described subtest stake, be wound with aluminium armor tape with test cable junction.
In above-mentioned embodiment, described test cable also can be welded on the binding post of subtest stake; Described ground resistance tester adopts digital earth resistance tester or hand-rail type earth resistance tester.
The utility model improves the test accuracy rate of stake resistance by the contact resistance that reduces to test between cable and auxiliary earth stake, thereby has eliminated the power distribution network O&M potential safety hazard causing due to earth fault.
The above is preferred implementation of the present utility model; for those skilled in the art; not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection domain of the present utility model.
Claims (5)
1. an earth resistance device, comprise ground resistance tester and two subtest stakes, it is characterized in that, also comprise three test cables and some aluminium armor tapes, one end of three described test cables is connected with ground resistance tester, the other end of a test cable in described three is connected with tested ground stud, the other end of all the other two test cables in described three is connected with the binding post of two subtest stakes respectively, on the binding post of described subtest stake, is wound with aluminium armor tape with test cable junction.
2. earth resistance device according to claim 1, is characterized in that, described test cable is intertwined and connected on the binding post of subtest stake.
3. earth resistance device according to claim 1, is characterized in that, described test cable is welded on the binding post of subtest stake.
4. according to the earth resistance device described in claims 1 to 3 any one, it is characterized in that, described ground resistance tester comprises digital earth resistance tester.
5. according to the earth resistance device described in claims 1 to 3 any one, it is characterized in that, described ground resistance tester comprises hand-rail type earth resistance tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529558.XU CN203433045U (en) | 2013-08-28 | 2013-08-28 | Ground resistance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320529558.XU CN203433045U (en) | 2013-08-28 | 2013-08-28 | Ground resistance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203433045U true CN203433045U (en) | 2014-02-12 |
Family
ID=50062073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320529558.XU Expired - Fee Related CN203433045U (en) | 2013-08-28 | 2013-08-28 | Ground resistance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203433045U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941097A (en) * | 2014-04-30 | 2014-07-23 | 国家电网公司 | Large ground grid grounding resistance real-time monitor |
| CN111239644A (en) * | 2019-10-17 | 2020-06-05 | 武汉海尔热水器有限公司 | Grounding detection system and method |
-
2013
- 2013-08-28 CN CN201320529558.XU patent/CN203433045U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103941097A (en) * | 2014-04-30 | 2014-07-23 | 国家电网公司 | Large ground grid grounding resistance real-time monitor |
| CN111239644A (en) * | 2019-10-17 | 2020-06-05 | 武汉海尔热水器有限公司 | Grounding detection system and method |
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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: 20140212 Termination date: 20160828 |