CN108627735A - A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure - Google Patents
A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure Download PDFInfo
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- CN108627735A CN108627735A CN201810833726.1A CN201810833726A CN108627735A CN 108627735 A CN108627735 A CN 108627735A CN 201810833726 A CN201810833726 A CN 201810833726A CN 108627735 A CN108627735 A CN 108627735A
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- detection device
- ground connection
- searches
- fast accurate
- connection failure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses methods and detection device that a kind of fast accurate searches Single-phase Ground Connection Failure, after there is singlephase earth fault, the either switch on main line is disconnected first, the resistance for disconnecting switch both sides is measured with detection device, if a side resistance is smaller, is continued selection disconnection switch in the range of the side and is measured with detection device, until determining branch line where singlephase earth fault, either switch is disconnected on the branch line again, is repeated the above steps, until determining the minimum zone where fault point.Present invention reduces the times of processing singlephase earth fault, efficiently solve the problems, such as that singlephase earth fault searches difficult, processing time length, not only customer outage hours are shortened, but also improves work efficiency, reduce examination air-supply danger, are suitable for region of the Rural Electric Power circuit compared with dispersion.
Description
Technical field
The present invention relates to technical field of electric power detection, specially a kind of method of fast accurate lookup Single-phase Ground Connection Failure
And detection device.
Background technology
Single-phase earthing is 10kV (35kV) single-phase earthing of small current earthing system, and singlephase earth fault is that distribution system is most normal
The failure seen mostly occurs in moist, rainy weather.Due on screen of trees, distribution line insulator it is single-phase breakdown, single-phase wire break and
Caused by the factors such as toy harm.Single-phase earthing not only affects the normal power supply of user, but also there may be excessively electric
Pressure, burns out equipment, or even cause phase fault and expand accident.The processing method for being familiar with earth fault is very heavy to operator on duty
It wants.Failure results in the decline of customer power supply reliability, and economic loss is caused to user.Therefore, shorten processing single-phase earthing
The time of failure restores have realistic meaning to customer power supply as early as possible.
Singlephase earth fault proximity switch tripping or will not fall quick-fried molten, be not easy to determine failure point range.Therefore, it is necessary to complete
Line, which is maked an inspection tour, searches fault point, and it is longer to search the time.Single-phase Ground Connection Failure usually has concealment, and completely making an inspection tour still can not send out
Existing fault point needs to carry out trying to send with dispatch contact.It is sent by examination, gradually determines fault point location, it is therefore desirable to improve
Detection method improves detection efficiency.
Invention content
The purpose of the present invention is to provide method and detection device that a kind of fast accurate searches Single-phase Ground Connection Failure, solutions
The problem of having determined proposed in background technology.
To achieve the above object, the present invention provides the following technical solutions：A kind of fast accurate lookup Single-phase Ground Connection Failure
Method, after there is singlephase earth fault, first disconnect main line on either switch, with detection device measure disconnect switch
The resistance of both sides continues selection disconnection switch in the range of the side and is measured with detection device if a side resistance is smaller, until
Branch line where determining singlephase earth fault, then either switch is disconnected on the branch line, it repeats the above steps, until determining fault point
The minimum zone at place.
As a kind of preferred embodiment of the present invention, the application method that detection device measures is to hang detection device upper end
It is connected on circuit to be detected, lower end ground connection reads the reading of ohmmeter.
A kind of fast accurate searches the detection device of Single-phase Ground Connection Failure, and single-phase connect is searched for above-mentioned fast accurate
The method of earth fault point, including hook, insulating bar, ohmmeter, conducting wire, ground pin, hook are set to the top of insulating bar, hang
Hook is that an annulus with opening is hook-shaped, and insulating bar is connect by conducting wire with ohmmeter, and ohmmeter connects ground pin by conducting wire,
Ground pin is connected at the ground connection in power circuit.
As a kind of preferred embodiment of the present invention, it is plastic shell outside insulating bar, is internally provided with resistor rod, resistance
Stick resistance value is more than 1.5 megaohms.
As a kind of preferred embodiment of the present invention, resistor rod is connected for several fixed value resistances.
As a kind of preferred embodiment of the present invention, resistor rod bottom is equipped with current limiter.
As a kind of preferred embodiment of the present invention, hook is equipped with high-voltage AC electroscope.
As a kind of preferred embodiment of the present invention, high-voltage AC electroscope voltage class is 10Kv.
As a kind of preferred embodiment of the present invention, hook may be configured as right angle hook.
Compared with prior art, beneficial effects of the present invention are as follows：The time of processing singlephase earth fault is shortened, effectively
It solves the problems, such as that singlephase earth fault searches difficult, processing time length, not only shortens customer outage hours, but also improve work
Efficiency reduces examination air-supply danger, is suitable for region of the Rural Electric Power circuit compared with dispersion.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is the schematic diagram for the method that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure；
Fig. 2 is the structural schematic diagram for the detection device that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure；
Fig. 3 is the insulating bar structural schematic diagram for the detection device that a kind of fast accurate of the present invention searches Single-phase Ground Connection Failure；
In figure：Hook 1, insulating bar 2, ohmmeter 3, conducting wire 4, ground pin 5, resistor rod 6, plastic shell 7, fixed value resistance 8, limit
Flow device 9, high-voltage AC electroscope 10.
Specific implementation mode
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, with reference to
Specific implementation mode, the present invention is further explained.
Referring to Fig. 1, the present invention provides a kind of technical solution：A kind of fast accurate searches the side of Single-phase Ground Connection Failure
Method disconnects the either switch on main line first after there is singlephase earth fault, is measured with detection device and disconnects switch both sides
Resistance, if a side resistance is smaller, continue in the range of the side selection disconnect switch measured with detection device, until determine
Branch line where singlephase earth fault, then either switch is disconnected on the branch line, it repeats the above steps, until where determining fault point
Minimum zone.
The application method that wherein detection device measures is that detection device upper end is articulated on circuit to be detected, lower termination
Ground reads the reading of ohmmeter.
The time that processing singlephase earth fault is shortened using the detection method efficiently solves singlephase earth fault lookup
Difficult, processing time length problem, not only shortens customer outage hours, but also improves work efficiency, reduces examination air-supply danger, is applicable in
In region of the Rural Electric Power circuit compared with dispersion.
Fig. 2, Fig. 3 are please referred to, detection method to realize the present invention devises a kind of fast accurate lookup single-phase earthing event
Hinder the detection device of point, including hook, insulating bar, ohmmeter, conducting wire, ground pin, hook is set to the top of insulating bar, hangs
Hook is that an annulus with opening is hook-shaped, and insulating bar is connect by conducting wire with ohmmeter, and ohmmeter connects ground pin by conducting wire,
Ground pin is connected at the ground connection in power circuit, and the detection device of this programme has easy to carry, easy to assembly, cost
It is low, the good feature of safety coefficient.
It is plastic shell outside insulating bar, is internally provided with resistor rod, resistor rod resistance value is more than 1.5 megaohms, and human body is born
Voltage security voltage range is 36V and hereinafter, since human body resistance value is about 1700 Europe, and the resistance value of resistor rod is arranged, it should
So that there is the case where circuit electrification, human body bears voltage and is not higher than 12V, and line voltage distribution is 10Kv, therefore resistor rod resistance
Value is 1700*10Kv/12V-1700=1.415 megaohm, it is contemplated that special circumstances, resistor rod resistance value are set greater than 1.5 megaohms.
Resistor rod is the series connection of several fixed value resistances, and concatenated form can make cost-effective, can also accurately control resistance value.
Resistor rod bottom is equipped with current limiter, and current limiter can limit electric current, and the safety of power worker is protected when electric current is excessive.
Hook is equipped with high-voltage AC electroscope, and high-voltage AC electroscope voltage class is 10Kv, can detect electric current.
Hook may be configured as right angle hook, be adapted to different power circuit environment.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill
For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes that come within the meaning and range of equivalency of the claims in the present invention
It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (9)
1. a kind of method that fast accurate searches Single-phase Ground Connection Failure, it is characterised in that：It is first after there is singlephase earth fault
The either switch on main line is first disconnected, the resistance for disconnecting switch both sides is measured with detection device, if a side resistance is smaller,
Continue selection disconnection switch in the range of the side to be measured with detection device, until determine branch line where singlephase earth fault, then
Either switch is disconnected on the branch line, is repeated the above steps, until determining the minimum zone where fault point.
2. the method that a kind of fast accurate according to claim 1 searches Single-phase Ground Connection Failure, it is characterised in that：It is described
The application method that detection device measures is that detection device upper end is articulated on circuit to be detected, and lower end ground connection reads ohmmeter
Reading.
3. a kind of fast accurate searches the detection device of Single-phase Ground Connection Failure, for realizing the fast accurate in claim 1
The method for searching Single-phase Ground Connection Failure, it is characterised in that：Including hook（1）, insulating bar（2）, ohmmeter（3）, conducting wire（4）、
Ground pin（5）, the hook（1）It is set to the insulating bar（2）Top, the hook（1）For an annulus with opening
It is hook-shaped, the insulating bar（2）Pass through conducting wire（4）With ohmmeter（3）Connection, the ohmmeter（3）Pass through conducting wire（4）Connection ground connection
Plug（5）, the ground pin（5）It is connected at the ground connection in power circuit.
4. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The insulating bar（2）Outside is plastic shell（7）, it is internally provided with resistor rod（6）, the resistor rod（6）Resistance value is more than 1.5 million
Europe.
5. a kind of fast accurate according to claim 4 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The resistor rod（6）For several fixed value resistances（8）Series connection.
6. a kind of fast accurate according to claim 5 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The resistor rod（6）Bottom is equipped with current limiter（9）.
7. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The hook（1）It is equipped with high-voltage AC electroscope（10）.
8. a kind of fast accurate according to claim 7 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The high-voltage AC electroscope（10）Voltage class is 10Kv.
9. a kind of fast accurate according to claim 3 searches the detection device of Single-phase Ground Connection Failure, it is characterised in that：
The hook（1）It may be configured as right angle hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833726.1A CN108627735A (en) | 2018-07-26 | 2018-07-26 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810833726.1A CN108627735A (en) | 2018-07-26 | 2018-07-26 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
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| Publication Number | Publication Date |
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| CN108627735A true CN108627735A (en) | 2018-10-09 |
Family
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| CN201810833726.1A Pending CN108627735A (en) | 2018-07-26 | 2018-07-26 | A kind of fast accurate searches the method and detection device of Single-phase Ground Connection Failure |
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Citations (11)
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| CN101382577A (en) * | 2008-10-24 | 2009-03-11 | 华北电力大学 | Single-phase earth fault positioning device for electrical power distribution network |
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| CN201845663U (en) * | 2010-10-27 | 2011-05-25 | 灵宝市电业局 | Multifunctional insulating supporting operating rod |
| CN201935978U (en) * | 2010-11-30 | 2011-08-17 | 河南省电力公司安阳供电公司 | Simple ground fault detection apparatus |
| CN202676848U (en) * | 2012-07-11 | 2013-01-16 | 河南省电力公司郑州供电公司 | High voltage electric power equipment grounding detector |
| CN203643555U (en) * | 2013-12-31 | 2014-06-11 | 西安兴汇电力科技有限公司 | Tour-inspection device for single-phase earth fault point of power distribution network |
| CN205826800U (en) * | 2016-07-14 | 2016-12-21 | 国网山东省电力公司平原县供电公司 | A kind of line-to-ground line selection apparatus |
| CN106501674A (en) * | 2016-10-24 | 2017-03-15 | 国网福建省电力有限公司 | Medium voltage distribution network single-phase earth fault positioning device and its Fault Locating Method |
| CN206114825U (en) * | 2016-09-28 | 2017-04-19 | 国网河南省电力公司安阳供电公司 | 10kV circuit phase to earth fault seeks appearance |
| CN207650315U (en) * | 2017-12-05 | 2018-07-24 | 国网宁夏电力有限公司固原供电公司 | Distribution line ground fault detection device |
-
2018
- 2018-07-26 CN CN201810833726.1A patent/CN108627735A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101382577A (en) * | 2008-10-24 | 2009-03-11 | 华北电力大学 | Single-phase earth fault positioning device for electrical power distribution network |
| CN101483337A (en) * | 2009-02-25 | 2009-07-15 | 北京盛华宏业科技有限公司 | Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line |
| CN101907675A (en) * | 2010-06-25 | 2010-12-08 | 江苏省电力公司泗洪县供电公司 | Method for finding out fault of distribution network circuit |
| CN201845663U (en) * | 2010-10-27 | 2011-05-25 | 灵宝市电业局 | Multifunctional insulating supporting operating rod |
| CN201935978U (en) * | 2010-11-30 | 2011-08-17 | 河南省电力公司安阳供电公司 | Simple ground fault detection apparatus |
| CN202676848U (en) * | 2012-07-11 | 2013-01-16 | 河南省电力公司郑州供电公司 | High voltage electric power equipment grounding detector |
| CN203643555U (en) * | 2013-12-31 | 2014-06-11 | 西安兴汇电力科技有限公司 | Tour-inspection device for single-phase earth fault point of power distribution network |
| CN205826800U (en) * | 2016-07-14 | 2016-12-21 | 国网山东省电力公司平原县供电公司 | A kind of line-to-ground line selection apparatus |
| CN206114825U (en) * | 2016-09-28 | 2017-04-19 | 国网河南省电力公司安阳供电公司 | 10kV circuit phase to earth fault seeks appearance |
| CN106501674A (en) * | 2016-10-24 | 2017-03-15 | 国网福建省电力有限公司 | Medium voltage distribution network single-phase earth fault positioning device and its Fault Locating Method |
| CN207650315U (en) * | 2017-12-05 | 2018-07-24 | 国网宁夏电力有限公司固原供电公司 | Distribution line ground fault detection device |
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Application publication date: 20181009 |
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