CN205910290U - Earth fault positioning device - Google Patents
Earth fault positioning device Download PDFInfo
- Publication number
- CN205910290U CN205910290U CN201620780786.8U CN201620780786U CN205910290U CN 205910290 U CN205910290 U CN 205910290U CN 201620780786 U CN201620780786 U CN 201620780786U CN 205910290 U CN205910290 U CN 205910290U
- Authority
- CN
- China
- Prior art keywords
- supply line
- electric leakage
- ground connection
- power supply
- earth
- 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
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- 238000013461 design Methods 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 238000009413 insulation Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 4
- 230000009466 transformation Effects 0.000 claims 1
- 238000005070 sampling Methods 0.000 abstract description 5
- 230000002708 enhancing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses an earth fault positioning device, including ground connection electrical parameter measuring module, electric leakage sampling circuit, and current detection module, the electric leakage sampling circuit stretch over and connect each power supply line, ground connection electrical parameter measuring module one end links to each other with electric leakage sampling circuit one end, other end ground connection, the current detection module both ends connect on the power supply line to it is connected with the power supply line to stride across electric leakage sampling circuit. The utility model discloses an earth fault positioning device can effectively judge the trouble in the power end logical OR circuit of measuring point side, each instrument and the equal slidable of power supply line tie point moreover, flexible processing can effectively reduce the fault point scope. This design can improve error detection efficiency, reduces the purpose of power off time in order to reach enhancing power supply reliability, and application range is wide, and convenient and fast is nimble effective, is worth popularizing and applying.
Description
Technical field
The utility model is related to electric power testing equipment technical field, more particularly, to a kind of Earth design equipment.
Background technology
Being recognized by long-time extensive investigations research, though through city, the upgrading of rural power grids, putting into a huge sum of money, having done a large amount of
Work, but the electric energy loss of low-voltage network is big, it is many to relate to electrification, power quality is low, electrical network unmanageable, earth leakage protective inefficacy
Still fundamentally do not solve etc. hard nut to crack, find through investigation, electricity supplying and using system ground connection (artificially connects containing neutral point
Ground and the earth fault of electricity supplying and using system), it is the basic reason causing the problems referred to above.At present, in actual production activity, distribution
Fault more than 90% is earth fault, including single-phase earthing and multiphase ground connection.Therefore, except people to be made are to power ground problem
There is a clear correct understanding, cause beyond the enough attention of people, specific solve problem is worked out on technological layer
Method.
Utility model content
For the deficiencies in the prior art, technical problem to be solved in the utility model is to provide a kind of detection efficiency
Earth design equipment high, that detection sensitivity is good, applied widely.
In order to solve above-mentioned technical problem, the utility model is achieved through the following technical solutions: a kind of earth fault is fixed
Position equipment, including ground connection electrical parameter measuring module, leak electricity sample circuit, and current detection module, and described electric leakage sample circuit is horizontal
Across and connect each supply line, described ground connection electrical parameter measuring module one end is connected with electric leakage sample circuit one end, another termination
Ground, described current detection module two end is connected in supply line, and crosses over electric leakage sample circuit and be connected with supply line.
As the improvement of technique scheme, described electric leakage sample circuit and supply line's tie point, and the inspection of described electric current
Survey module and supply line's tie point, all can slide in supply line.
Further, described ground connection electrical parameter measuring module is insulation resistance meter.
Further, described current detection module is galvanometer.
Further, described supply line one end connects transformer station's power end, and the other end connects three-phase windings transformer.
Further, described transformer neutral point is earth-free.
With respect to prior art, the beneficial effects of the utility model are: Earth design equipment profit of the present utility model
With wire, there is certain resistance, apply a galvanic current pressure when on the line, then circuit and earth point will constitute one
Individual circuit loop, thus work with the principle applying power supply point one pressure drop of generation.Make in insulation resistance meter line attachment both sides
With galvanometer detect two ends pressure drop situation can effectively failure judgement in the power end of measurement point or line side, (fault is relatively low in voltage
That side), and each instrument and supply line's tie point are all slidably, and sweetly disposition can effectively reduce fault point range.
The design can improve trouble shoot efficiency, reduce power off time to reach the purpose improving power supply reliability, make
Wide with scope, convenient and swift, flexibly effectively, it is worthy of popularization.
Brief description
In order to be illustrated more clearly that the technical scheme of the utility model embodiment, simple by making to the accompanying drawing of embodiment below
Ground is introduced.
Fig. 1 is the structural representation of the Earth design equipment of the utility model preferred embodiment.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, it is fully described by it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.
Based on the embodiment in the utility model, those of ordinary skill in the art are obtained under the premise of not making creative work
Every other embodiment, broadly falls into the scope of the utility model protection.
As shown in figure 1, being the structural representation of the Earth design equipment of the utility model preferred embodiment, this practicality
New Earth design equipment includes being grounded electrical parameter measuring module 1, and leak electricity sample circuit 2, and current detection module 3,
Described electric leakage sample circuit 2 across and connect each supply line, described ground connection electrical parameter measuring module 1 one end and electric leakage sampling electricity
Road 2 one end is connected, and the other end is grounded, and described 3 liang of ends of current detection module are connected in supply line, and cross over electric leakage sample circuit
2 with the connection of supply line.
As the improvement of technique scheme, described electric leakage sample circuit 2 and supply line's tie point, and the inspection of described electric current
Survey module 3 and supply line's tie point, all can slide in supply line.
Further, described ground connection electrical parameter measuring module 1 is insulation resistance meter.
Further, described current detection module 3 is galvanometer.
Further, described supply line one end connects transformer station's power end, and the other end connects three-phase windings 4 transformer.
Further, described transformer neutral point is earth-free.
When adopting insulation resistance meter detection fault at ordinary times, because transformer neutral point is earth-free, and three-phase windings are to direct current
The almost nil characteristic of electrical impedance, leads to circuit three-phase when measuring using insulation resistance meter such as short circuit.
Earth design equipment utilization wire of the present utility model has certain resistance, applies one when on the line
Galvanic current pressure, then circuit and earth point will constitute a circuit loop (in Fig. 1 arrows the sense of current), thus
With the principle work applying power supply point one pressure drop of generation.Galvanometer is used to detect two ends in insulation resistance meter line attachment both sides
Pressure drop situation can effectively failure judgement in the power end of measurement point or line side (fault is in that relatively low side of voltage), and each instrument
With supply line's tie point all slidably, sweetly disposition can effectively reduce fault point range to table.
The design can improve trouble shoot efficiency, reduce power off time to reach the purpose improving power supply reliability, make
Wide with scope, convenient and swift, flexibly effectively, it is worthy of popularization.
Above disclosed only preferred embodiment of the present utility model, can not limit this practicality with this new certainly
The interest field of type, the equivalent variations therefore made according to the utility model claim, still belong to the model that the utility model is covered
Enclose.
Claims (6)
1. it is characterised in that including ground connection electrical parameter measuring module, leak electricity a kind of Earth design equipment sample circuit, and
Current detection module, described electric leakage sample circuit across and connect each supply line, described ground connection electrical parameter measuring module one end
It is connected with electric leakage sample circuit one end, the other end is grounded, and described current detection module two end is connected in supply line, and crosses over institute
State electric leakage sample circuit to be connected with supply line.
2. Earth design equipment according to claim 1 is it is characterised in that described electric leakage sample circuit and supply lines
Road tie point, and described current detection module and supply line's tie point, all can slide in supply line.
3. Earth design equipment according to claim 2 is it is characterised in that described ground connection electrical parameter measuring module is
Insulation resistance meter.
4. Earth design equipment according to claim 1 is it is characterised in that described current detection module is electric current
Meter.
5. Earth design equipment according to claim 1 is it is characterised in that described supply line one end connects power transformation
Station owner's circuit, the other end connects three-phase windings transformer.
6. Earth design equipment according to claim 5 is it is characterised in that described transformer neutral point is earth-free.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620780786.8U CN205910290U (en) | 2016-07-22 | 2016-07-22 | Earth fault positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620780786.8U CN205910290U (en) | 2016-07-22 | 2016-07-22 | Earth fault positioning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205910290U true CN205910290U (en) | 2017-01-25 |
Family
ID=57806046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620780786.8U Expired - Fee Related CN205910290U (en) | 2016-07-22 | 2016-07-22 | Earth fault positioning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205910290U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764019A (en) * | 2019-10-30 | 2020-02-07 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judgment and high-precision positioning method based on double-end measurement |
-
2016
- 2016-07-22 CN CN201620780786.8U patent/CN205910290U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110764019A (en) * | 2019-10-30 | 2020-02-07 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judgment and high-precision positioning method based on double-end measurement |
| CN110764019B (en) * | 2019-10-30 | 2021-07-30 | 国网湖北省电力有限公司电力科学研究院 | Line temporary grounding quantity judging and positioning method based on double-end measurement |
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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: 20170125 Termination date: 20170722 |