CN201935978U - Simple ground fault detection apparatus - Google Patents
Simple ground fault detection apparatus Download PDFInfo
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- CN201935978U CN201935978U CN2010206332277U CN201020633227U CN201935978U CN 201935978 U CN201935978 U CN 201935978U CN 2010206332277 U CN2010206332277 U CN 2010206332277U CN 201020633227 U CN201020633227 U CN 201020633227U CN 201935978 U CN201935978 U CN 201935978U
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- ground fault
- fault detection
- detection apparatus
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Abstract
The utility model discloses a simple ground fault detection apparatus. The simple ground fault detection apparatus comprises a box body, wherein a tramegger is arranged in the box body; the output end of the tramegger is connected to a connection line E and a connection line L through a disconnecting link; the end part of the connection line E is a U-shaped copper connector; and the end part of the connection line L is a hook. Through the simple ground fault detection apparatus adopting the technical scheme, a ground fault searching range is quickly and effectively reduced and is convenient to reduce, a ground fault point can be searched out in a short time, the complex procedures of sectional try current delivery in the traditional sense are reduced, the workload is reduced, the power failure time is shortened, and the efficiency is improved.
Description
Technical field
The utility model relates to a kind of Earth Fault Detection instrument.
Background technology
Enter thunderstorm season, the frequency of 10 KV generation earth faults is higher.The ground connection of equipment for power transmission and distribution net distribution line can be divided into single-phase earthing, two phase ground and three-phase ground connection.According to earth fault classification, earth fault has two kinds of permanent earth and transient earthings.The former normally the insulation breakdown lead reason such as land and cause, the latter is generally reasons such as foreign matter is arranged on lightning flash over and the lead and causes that wherein modal is the overhead transmission line single-phase earthing.
When distribution line generation earth fault,, need in time faulty line and non-fault line to be distinguished for fear of the expansion of accident.In transformer station (institute), switchyard or generating plant; if " one-phase ground protection line selection apparatus " reliably is not installed; the power failure audit trial that just needs manually operate a switch one by one could be selected faulty line, sometimes even will just can find out all distribution lines that link to each other with bus power failure of operating a switch.Will cause the interruption of non-fault line powering like this, cause large-area power-cuts; Simultaneously, also increase the action frequency of high-voltage switch gear (isolating switch), shortened serviceable life, reduced the reliability and the delivery of power supply.And to search earth point on the line, and also need numerous branched lines and main line are disconnected one by one, use each section of insulation resistance instrument measurement or each branch insulating resistance value over the ground again, by artificial judgment trouble spot scope.This process is very complicated, and workload is very big; For personal safety, multiple safety practice need be set, expend great amount of manpower, goods and materials and time, increased power worker's labour intensity, also have unsafe hidden danger.
Summary of the invention
The purpose of this utility model provides a kind of Earth Fault Detection instrument, and this detector can shorten the time of searching the trouble spot, reduces the complicated procedures that the segmentation examination is sent on the traditional sense, reduces workload, shortens power off time.
For achieving the above object, the utility model is by the following technical solutions:
The utility model comprises casing, at described box house megohmmeter is set, and the output terminal of megohmmeter connects E connecting line and L connecting line by disconnecting link, and wherein E connecting line end is a U type copper sleeve, and L connecting line end is hook.
Adopt the utility model of technique scheme, convenient, fast, dwindle the earth fault scope of searching effectively, can find earth fault at short notice, reduced the complicated procedures that the segmentation examination is sent on the traditional sense, reduce workload, shorten power off time, raise the efficiency.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Fig. 2 is the structural representation of E connecting line in the utility model.
Fig. 3 is the structural representation of L connecting line in the utility model.
Embodiment
As Fig. 1, Fig. 2, shown in Figure 3, the utility model comprises casing 1, in casing 1 inside 2500 volts of megohmmeters 2 are set, the output terminal of 2500 volts of megohmmeters 2 connects E connecting line and L connecting line by disconnecting link K, wherein E connecting line end is a U type copper sleeve 3, L connecting line end is used to connect 10 kilovolts of ground wire joints for hook 4, hook 4.
Need to prove that above-mentioned E connecting line and L connecting line are 4 square millimeters of multiply copper cash.Wherein the E connecting line with U type copper sleeve is connected to megohmmeter black line one end, and the L connecting line is connected to megohmmeter red line one end, and is convenient, fast when articulating circuit.
When searching fault, earlier according to survey is shaken in the faulty line segmentation, dwindling fault coverage, the pending fault circuit narrows down to the troubleshooting principle that road along the line is maked an inspection tour comprehensively, checked behind the minimum zone to carry out.
During troubleshooting, check whether megohmmeter is normal.To 10 kilovolts of faulty line segmentations, with circuit 1/2 place and switchgear is arranged or easily segmentation place be advisable.Respectively with long 20 meters band hook receivers be connected to red 4 square millimeters of copper cash, 4 square millimeters of insulation of 10 meters band U type copper sleeve black multiply copper conductors connect megohmmeter " line " (L) and " " (G) end, the other end connects tested phase line and earthing pole respectively, and should contact good.At the uniform velocity shake the megohmmeter handle with per minute 120 commentaries on classics, observe registration.Insulating resistance value is 1 to 5 megaohm under the general normal condition, can descend to some extent during weather such as rainy day, greasy weather, and the megohmmeter registration was zero when permanent earth fault took place.Progressively dwindle the troubleshooting scope according to above-mentioned steps, after faulty line narrowed down to minimum zone, inspection comprehensively along the line in this scope was again found the trouble spot and is got rid of fault.
Must be noted that and be: the one, to follow safety rules when searching fault and the site safety requirement.The safe distance and the data of shaking when surveying in order to guarantee to insulate are accurate, shake the copper core of surveying usefulness and forbid to contact human body or other objects.The 2nd, shake and want conscientious careful when surveying, tackle failure cause analysis simultaneously.The 3rd, after measurement finishes, equipment under test should be discharged.Such as, may there be a plurality of earth points simultaneously in same faulty section, get rid of place's earth fault after, should after insulating resistance value is qualified, can recover to send once more to line test.
Claims (1)
1. simple and easy Earth Fault Detection instrument, it is characterized in that: it comprises casing (1), in described casing (1) inside megohmmeter (2) is set, the output terminal of megohmmeter (2) connects E connecting line and L connecting line by disconnecting link (K), wherein E connecting line end is a U type copper sleeve (3), and L connecting line end is hook (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206332277U CN201935978U (en) | 2010-11-30 | 2010-11-30 | Simple ground fault detection apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206332277U CN201935978U (en) | 2010-11-30 | 2010-11-30 | Simple ground fault detection apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201935978U true CN201935978U (en) | 2011-08-17 |
Family
ID=44447496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206332277U Expired - Fee Related CN201935978U (en) | 2010-11-30 | 2010-11-30 | Simple ground fault detection apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201935978U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510768A (en) * | 2015-11-25 | 2016-04-20 | 国网河南桐柏县供电公司 | Trouble shooting method for service live grounding |
| CN108627735A (en) * | 2018-07-26 | 2018-10-09 | 浙江德辉电力安装工程有限公司 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
-
2010
- 2010-11-30 CN CN2010206332277U patent/CN201935978U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105510768A (en) * | 2015-11-25 | 2016-04-20 | 国网河南桐柏县供电公司 | Trouble shooting method for service live grounding |
| CN108627735A (en) * | 2018-07-26 | 2018-10-09 | 浙江德辉电力安装工程有限公司 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110817 Termination date: 20111130 |