CN109932609A - Rural area low-voltage power supply platform area failure leakage current measuring tool - Google Patents
Rural area low-voltage power supply platform area failure leakage current measuring tool Download PDFInfo
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- CN109932609A CN109932609A CN201910162105.XA CN201910162105A CN109932609A CN 109932609 A CN109932609 A CN 109932609A CN 201910162105 A CN201910162105 A CN 201910162105A CN 109932609 A CN109932609 A CN 109932609A
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- operating stick
- current transformer
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Abstract
The invention discloses a kind of rural area low-voltage power supply platform area failure leakage current measuring tools, it include: operating stick, fixed pulley and split core type current transformer are fixed in operating stick, split core type current transformer installation is fixed on overhead transmission line, wherein first lever of split core type current transformer is fixed with operating stick, another lever is connected with drawstring, and drawstring is sagging after fixed pulley to extend to ground surface end, controls the jaw of split core type current transformer to carry out pulling in ground surface end and opens and closure；Link rod, upper end are fixed with operating stick, the installation and dismounting for compounding practice bar；Current line, one end are connect with split core type current transformer, and the other end extends to ground and connect with electric leakage measuring instrument；Leak electricity measuring instrument, accesses overhead transmission line three-phase and four-line electric current, carries out leakage current measurement.Measurement of the present invention to overhead transmission line leakage current, can rapid drop check range, substantially increase the efficiency of staff.
Description
Technical field
The present invention relates to power grid maintenance technical fields, especially failure leakage current measuring tool.
Background technique
Since user relatively disperses, supply path is longer, is generally used 0.4kv three-phase and four-line frame in rural area low-voltage power supply platform area
The mode on ceases to be busy road is powered.In the daily work, the production of the reasons such as consumer electronics failure or aging circuit insulating layer breakage can be encountered
Raw electric leakage causes electric energy loss, the risk of person electric shock.But since the general route of overhead transmission line is compared with long, branch is more, middle line
Branch's electric leakage device is fitted without, and is caused in leak current fault troubleshooting procedure, and specific fault point difficulty, processing are positioned in troubleshooting procedure
Efficiency is lower.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of measurements of rural area low-voltage power supply platform area failure leakage current
Tool facilitates the leak current fault of overhead transmission line to check, improves efficiency.
In order to solve the above technical problems, the present invention adopts the following technical scheme: rural area low-voltage power supply platform area failure electric leakage electricity
Flow measurement tool, comprising:
Operating stick, fixed pulley and split core type current transformer are fixed in operating stick, and split core type current transformer installation is fixed to
On overhead transmission line, wherein first lever of split core type current transformer is fixed with operating stick, another lever is connected with drawstring, is drawn
Rope is sagging after fixed pulley to extend to ground surface end, controls the jaw of split core type current transformer to carry out pulling in ground surface end
It opens and is closed；
Link rod, upper end are fixed with operating stick, the installation and dismounting for compounding practice bar；
Current line, one end are connect with split core type current transformer, and the other end extends to ground and connect with electric leakage measuring instrument；
Leak electricity measuring instrument, accesses overhead transmission line three-phase and four-line electric current, carries out leakage current measurement.
Optionally, first lever of the electric leakage measuring instrument is inserted into fixed sleeving, and the fixed sleeving and operating stick are welded
Connect fixation.
Optionally, the operating stick is equipped with socket, and link rod upper end insertion socket is simultaneously locked.
Optionally, link rod upper end is inserted into socket and is fixed using screw locking.
The present invention by adopting the above technical scheme, has the following beneficial effects:
1, the leakage current measurement to overhead transmission line fulcrum is realized using the measurement method of secondary current.Overhead transmission line is all
High-altitude parallel lines will realize the leakage current measurement to its a certain node, on the one hand need the bigbore pincerlike meter of super large, but frame
Ceases to be busy road cross section span half is both greater than one meter, the so big bigbore pincerlike meter of super large, in measurement accuracy and design
Through difficult to realize；Another aspect overhead transmission line is mostly the bare conductor of electrification, and aerological measurement security risk is larger.The present invention passes through
Current transformer is installed on overhead transmission line and carries out secondary side measurement, so that becoming simple easy to overhead transmission line leakage current measurement
Row, and greatly reduce security risk.
2, using the method for fixed pulley and drawstring cooperation, pulling is carried out in ground surface end to control the pincers of split core type current transformer
Mouth opens and closure, thus operator can remotely install on the ground to overhead transmission line and dismounting current transformer.For frame
Ceases to be busy road needs to install and removes current transformer by the realization that secondary side current measures thinking, if operator steps on bar
If operation, it will so that measurement work is become very complicated, greatly increase workload, and safe operation risk is high.The present invention is set
The operating stick of meter cooperates link rod, can installation and dismounting of the simple and quick realization to current transformer on the ground.
3, leak current fault point is checked and determined for line loss, is provided strong tool, is greatly improved work efficiency.Rural area
Generally all radius of electricity supply is longer for power supply line, and branch point is also more, as leaked electricity under certain branch point, blanket type exclude workload compared with
Greatly, it excludes difficult.Measurement of the present invention to overhead transmission line leakage current, can rapid drop check range, substantially increase work people
The efficiency of member.
The specific technical solution of the present invention and its advantages will in the following detailed description in conjunction with attached drawing into
Row detailed description.
Detailed description of the invention
Present invention will be further described below with reference to the accompanying drawings and specific embodiments:
Fig. 1 is operation of the present invention instrumentation plan；
Fig. 2 is leakage current measurement schematic diagram of the present invention.
Specific embodiment
The characteristics of present invention is according to rural area low-voltage overhead line road designs leakage current measuring tool, is able to achieve personnel on ground
Planar survey overhead line failure leakage current, the personnel of reducing ascend a height the security risk in checking process.By to overhead transmission line
Secondary side current measurement detects the leakage current size of overhead transmission line and the specific phase of failure electric leakage, can carry out to route
Measurement paragraph by paragraph reduces investigation range, quickly orients fault point.
Rural area low-voltage power supply platform area failure leakage current measuring tool, comprising:
Operating stick 2, fixed pulley and split core type current transformer 1 are fixed in operating stick, and split core type current transformer installation is fixed
Onto overhead transmission line, wherein first lever of split core type current transformer is fixed with operating stick, another lever is connected with drawstring
4, drawstring is sagging after fixed pulley to extend to ground surface end, controls the pincers of split core type current transformer to carry out pulling in ground surface end
Mouth opens and closure；
Link rod 3, upper end is fixed with operating stick, the installation and dismounting for compounding practice bar；
Current line 5, one end is connect with split core type current transformer, and the other end extends to ground and connect with electric leakage measuring instrument；
Leak electricity measuring instrument 6, accesses overhead transmission line three-phase and four-line electric current, carries out leakage current measurement.
Wherein, first lever of the electric leakage measuring instrument is inserted into fixed sleeving, and the fixed sleeving and operating stick are welded
It is fixed.The operating stick is equipped with socket, and link rod upper end insertion socket is simultaneously locked.
Theoretical foundation of the Kirchhoff's current law (KCL) as overhead transmission line leakage current measurement.Kirchhoff's current law (KCL), table
State in office one instantaneously, the sum of the electric current for flowing to a certain node is constantly equal to the sum of the electric current flowed out by the node.The present invention passes through
Current transformer is installed to measure the transient current vector sum flowed through in phase line and neutral return path, if instantaneously on overhead transmission line
It current phasor and is not zero, is then leakage current；For example zero, then explanation is without leakage current.
Current measurement is carried out using installation forcipated mutual-inductor mode.Since overhead transmission line is higher, word order lateral distance
It is difficult using apparatus measures loop current.The present invention, will be secondary by installing split core type current transformer additional on three-phase and four-line respectively
Current loop guides to ground, is convenient for measuring.Following in measurement process not influences route normal operation, and operating process ensures that safety can
It leans on.
The opening and closure of split core type current transformer are controlled in operating stick by the way of fixed pulley and drawstring cooperation.Measurement
When need that split core type current transformer is installed in the phase line and the neutral conductor of overhead transmission line by operating stick, due to current clamp shape
Smaller (bore is Ф 50mm), is difficult to control the opening and closure of its binding clip at a distance.The present invention installs fixed sliding in operating stick
Current clamp is clamped and one end is fixed in operating stick by wheel, and the other end is used using drawstring connection solderless wrapped connection on fixed pulley, by pulley
For fulcrum, remote opening for easily control current clamp can close on the ground, very easily by current clamp in overhead line
Road is fixed and removes.
Measurement process does not influence route and operates normally and safe and reliable.In package unit use process, do not need to disconnect fortune
Capable low-voltage circuit or power failure, does not influence the operation of power grid.Split core type current transformer, current line, drawstring, link rod when measurement
It is all insulating materials Deng outside, safe operation is reliable.
It is measured by current line, can detect that leakage current size and analyzes electric leakage phase.Every phase overhead line installation one
Current clamp, extends to ground for current line, can measure to the electric current of the overhead line of three-phase and four-line.It is every according to three-phase and four-line
Current phasor on root conducting wire and as leakage current value, it is identical as primary current phase that applied current clamps secondary current, size
Directly proportional characteristic, measure current clamp secondary current vector sum come convert the current phasor on route and.To reach measurement
The purpose of overhead line failure leakage current.It is compared simultaneously by current phasor and with the angle of each electric current, analysis electric leakage
Phase.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, is familiar with
The those skilled in the art should be understood that the present invention includes but is not limited to content described in specific embodiment above.It is any
Modification without departing from function and structure principle of the invention is intended to be included in the range of claims.
Claims (4)
1. rural area low-voltage power supply platform area failure leakage current measuring tool, characterized by comprising:
Operating stick, fixed pulley and split core type current transformer are fixed in operating stick, and split core type current transformer installation is fixed to aerial
On route, wherein first lever of split core type current transformer is fixed with operating stick, another lever is connected with drawstring, drawstring warp
Cross it is sagging after fixed pulley extend to ground surface end, with carry out pulling in ground surface end control the jaw of split core type current transformer open with
Closure；
Link rod, upper end are fixed with operating stick, the installation and dismounting for compounding practice bar；
Current line, one end are connect with split core type current transformer, and the other end extends to ground and connect with electric leakage measuring instrument；
Leak electricity measuring instrument, accesses overhead transmission line three-phase and four-line electric current, carries out leakage current measurement.
2. rural area low-voltage power supply platform area failure leakage current measuring tool according to claim 1, it is characterised in that: described
First lever of electric leakage measuring instrument is inserted into fixed sleeving, and the fixed sleeving is welded and fixed with operating stick.
3. rural area low-voltage power supply platform area failure leakage current measuring tool according to claim 2, it is characterised in that: described
Operating stick is equipped with socket, and link rod upper end insertion socket is simultaneously locked.
4. rural area low-voltage power supply platform area failure leakage current measuring tool according to claim 3, it is characterised in that: crane
Stick upper end insertion socket is simultaneously fixed using screw locking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910162105.XA CN109932609A (en) | 2019-03-05 | 2019-03-05 | Rural area low-voltage power supply platform area failure leakage current measuring tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910162105.XA CN109932609A (en) | 2019-03-05 | 2019-03-05 | Rural area low-voltage power supply platform area failure leakage current measuring tool |
Publications (1)
| Publication Number | Publication Date |
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| CN109932609A true CN109932609A (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910162105.XA Pending CN109932609A (en) | 2019-03-05 | 2019-03-05 | Rural area low-voltage power supply platform area failure leakage current measuring tool |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075577A (en) * | 2021-02-18 | 2021-07-06 | 国家电网有限公司 | Residual current monitoring system and method for low-voltage alternating-current power supply system |
| CN114184981A (en) * | 2021-12-10 | 2022-03-15 | 国网福建省电力有限公司南平供电公司 | Low-voltage electric leakage positioning equipment and offline electric leakage evaluation method |
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| CN203164352U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An electric leakage detecting device of a live low-voltage line |
| CN204832317U (en) * | 2015-08-04 | 2015-12-02 | 孙晓星 | Split type electric leakage measuring apparatu |
| CN105738763A (en) * | 2016-02-16 | 2016-07-06 | 国家电网公司 | Low-voltage TT wiring system transformer area electric leakage point positioning method and special-purpose detection tool |
| CN207964927U (en) * | 2018-01-29 | 2018-10-12 | 广西电网有限责任公司玉林北流供电局 | A kind of split type pincerlike line current measuring instrument |
| CN208399622U (en) * | 2018-07-27 | 2019-01-18 | 保定朗信电子科技有限公司 | A kind of power utility check instrument for checking low-voltage power line leakage point of electricity |
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2019
- 2019-03-05 CN CN201910162105.XA patent/CN109932609A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203164352U (en) * | 2013-04-07 | 2013-08-28 | 国家电网公司 | An electric leakage detecting device of a live low-voltage line |
| CN204832317U (en) * | 2015-08-04 | 2015-12-02 | 孙晓星 | Split type electric leakage measuring apparatu |
| CN105738763A (en) * | 2016-02-16 | 2016-07-06 | 国家电网公司 | Low-voltage TT wiring system transformer area electric leakage point positioning method and special-purpose detection tool |
| CN207964927U (en) * | 2018-01-29 | 2018-10-12 | 广西电网有限责任公司玉林北流供电局 | A kind of split type pincerlike line current measuring instrument |
| CN208399622U (en) * | 2018-07-27 | 2019-01-18 | 保定朗信电子科技有限公司 | A kind of power utility check instrument for checking low-voltage power line leakage point of electricity |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113075577A (en) * | 2021-02-18 | 2021-07-06 | 国家电网有限公司 | Residual current monitoring system and method for low-voltage alternating-current power supply system |
| CN114184981A (en) * | 2021-12-10 | 2022-03-15 | 国网福建省电力有限公司南平供电公司 | Low-voltage electric leakage positioning equipment and offline electric leakage evaluation method |
| CN114184981B (en) * | 2021-12-10 | 2023-12-22 | 国网福建省电力有限公司南平供电公司 | Low-voltage electric leakage positioning equipment and off-line electric leakage assessment method |
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Application publication date: 20190625 |