CN107015183B - Portable small current earthing wire-selecting tester and test method - Google Patents
Portable small current earthing wire-selecting tester and test method Download PDFInfo
- Publication number
- CN107015183B CN107015183B CN201710124522.6A CN201710124522A CN107015183B CN 107015183 B CN107015183 B CN 107015183B CN 201710124522 A CN201710124522 A CN 201710124522A CN 107015183 B CN107015183 B CN 107015183B
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- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 27
- 238000012795 verification Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The invention discloses portable small current earthing wire-selecting tester and test methods, including shell, the surface of the shell is equipped with the supply hub being connected with the intracorporal test circuit of shell, power switch, voltage output jack, electric current output plughole, voltmeter, ammeter, adjusting pressuring knob and adjusts stream knob；The test circuit includes transformer, and the main side of the transformer connects power supply while connecting with the power switch, and the secondary side output of the transformer is two sides, and upside is connected with the voltmeter and output as adjustable alternating voltage；The ammeter is connected in downside and output is alternating current, has three output branches, is reserved as electric current output plughole after a branch series connection slide rheostat, another two branches are directly reserved as electric current output plughole.The device is exclusively used in Small Electric Current Earthing And Routing Device test, small in size, light-weight, wiring is simple, easy to carry, improves the testing efficiency of small current earthing wire-selecting, alleviates the labor intensity of service personnel.
Description
Technical field
The present invention relates to small current earthing wire-selecting test device technical field more particularly to portable small current earthing wire-selectings
Tester and test method；It is mainly used in that substation is new, extension project is to the new comprehensive tune for going up Small Electric Current Earthing And Routing Device
Test in examination or daily maintenance to Small Electric Current Earthing And Routing Device route selection correctness.
Background technique
Small Electric Current Earthing And Routing Device is the important component of relay protection of power system and automatic safety device.When non-
When ground fault occurs for the distribution network systems of effective grounding, distribution regulates and controls personnel according to the ground connection sent on Small Electric Current Earthing And Routing Device
Line fault information carries out drawing road, promptly isolates grounding point, eliminates and threatens the person, power grid and equipment, guarantees to power consumer
Reliable power supply.Small Electric Current Earthing And Routing Device route selection accuracy directly affects power supply reliability, therefore reinforces small current neutral grounding
Line selection apparatus acceptance test and daily maintenance test, it is most important to guarantee that Small Electric Current Earthing And Routing Device operates normally.
Currently, Small Electric Current Earthing And Routing Device debugging and route selection test use general relay-protection tester, do not have
Dedicated small current earthing wire-selecting testing tool.Relay-protection tester is powerful, versatile, and the various relays of adjustable are protected
Protection unit and automatic safety device apply many functions in Small Electric Current Earthing And Routing Device test to be not fully utilized, out
The phenomenon that existing " low load with strong power "；And the equipment instrument is big, heavy, and two people is at least needed to carry, wiring is complicated when debugging, aggravates
The labor intensity of service personnel, reduces the testing efficiency of small current earthing wire-selecting.Therefore, a kind of small in size, weight is invented
Gently, wiring is simple, the portable portable testing tool for being exclusively used in Small Electric Current Earthing And Routing Device debugging seems and especially must
It wants.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems, provides portable small current earthing wire-selecting tester and test
Method, which is exclusively used in Small Electric Current Earthing And Routing Device test, small in size, light-weight, wiring is simple, easy to carry, improves
The testing efficiency of small current earthing wire-selecting, alleviates the labor intensity of service personnel.
To achieve the goals above, the present invention adopts the following technical scheme:
The surface of portable small current earthing wire-selecting tester, including shell, the shell is equipped with and the intracorporal test of shell
Supply hub that circuit is connected, power switch, voltage output jack, electric current output plughole, voltmeter, ammeter, pressure regulation rotation
Button and tune stream knob；
The test circuit includes transformer, and the main side of the transformer connects power supply while connecting with the power switch,
The secondary side output of the transformer is two sides, and upside is connected with the voltmeter and output as adjustable alternating voltage, the electricity
Pressure table is for showing output voltage numerical values recited；The downside series connection ammeter and output are alternating current, and ammeter is used to show
Show output current values size, there are three output branches, be reserved as electric current output plughole after a branch series connection slide rheostat,
Output electric current is I1, and another two branches are directly reserved as electric current output plughole, and output electric current is I2 and I3, and the amplitude size of I1 is
The polarity of the sum of I2 and I3, I1 are opposite with I2, I3.
The adjustable alternating voltage of output is 0-40V/50Hz, when simulating the electric system of non-effective earthing and being grounded
The residual voltage of generation, the zero sequence for verifying Small Electric Current Earthing And Routing Device start voltage definite value.
The slide rheostat is 500-1000 Ω, keeps output electric current adjustable between AC10-20mA.
The upside on the secondary side of the transformer is adjustable AC transformer, and the adjusting pressuring knob is configured as described in adjusting
The upside on the secondary side of transformer.
The tune stream knob is configured as adjusting the slide rheostat.
10V/50Hz alternating current is exported on the downside of the secondary side of the transformer.
Using the test method of the portable small current earthing wire-selecting tester, comprising:
(1) voltage output jack is connected to the U of Small Electric Current Earthing And Routing Device by connecting lineL；
(2) three electric current output plugholes are connected to the I of Small Electric Current Earthing And Routing Device by connecting lineL1、IL2…ILnWantonly three
Branch；
(3) residual voltage for adjusting adjusting pressuring knob verification Small Electric Current Earthing And Routing Device starts definite value；
(4) it adjusts stream knob and changes three electric current output plugholes and IL1、IL2…ILnWantonly three branch connection relationships school
Test the route selection accuracy of Small Electric Current Earthing And Routing Device.
Beneficial effects of the present invention:
The device is exclusively used in Small Electric Current Earthing And Routing Device test, small in size, light-weight, wiring is simple, easy to carry, mentions
The high testing efficiency of small current earthing wire-selecting, alleviates the labor intensity of service personnel.
The malfunction when electric system of test breadboardin non-effective earthing is grounded, the voltage of output and
Current relationship compared the residual voltage generated when the electric system of non-effective earthing is grounded and each branch zero-sequence current it is big
Small and polar relationship, it is excellent with the test circuit test Small Electric Current Earthing And Routing Device has that principle is simple and simulated effect is good
Point.
Detailed description of the invention
Fig. 1 is the circuit diagram of present invention test circuit；
Fig. 2 is outside drawing of the invention.
Wherein, 1, shell；2, supply hub；3, power switch；4, voltage output jack；5, electric current output plughole；6, electric
Press table；7, ammeter；8, adjusting pressuring knob；9, stream knob is adjusted；10, AC transformer；11, slide rheostat.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
Such as Fig. 1-2, apparatus of the present invention are exported by shell 1, supply hub 2, power switch 3, voltage output jack 4, electric current
Jack 5, ammeter 7, adjusting pressuring knob 8, adjusts stream knob 9, AC transformer 10, slide rheostat 11 to form at voltmeter 6, wherein
Supply hub 2, power switch 3 are located in the right panel of shell 1, voltage output jack 4, electric current output plughole 5, voltmeter 6,
Ammeter 7, adjusting pressuring knob 8 adjust stream knob 9 to be located in the upper panel of shell 1, and AC transformer 10, slide rheostat 11 fill
Inside shell 1.
Shell 1 sets palisade ventilation opening using metal material, long 15cm, wide 5cm, high 10cm, rear side panel.
10 input power of AC transformer is AC220V/50Hz alternating current, is labeled as L, N；Output side is AC0-40V/
Alternating current is adjusted in 50Hz voltage, is labeled as Ul, Un；Exporting two sides is AC10V/50Hz alternating current, and one flanks 500-1000 Ω
Slide rheostat 11 is labeled as I1, and side is divided into Liang Ge branch, is labeled as I2, I3.
AC transformer 10 is adjusted in adjusting pressuring knob 8, exports Ul, Un between AC0-40V, and can be on voltmeter 6
Observe numerical value.
Stream 9 adjustable sliding rheostat 11 of knob is adjusted, exports I1 between AC10-20mA, and can see on ammeter 7
Examine numerical value；I2, I3 numerical value are the half of I1 numerical value, and direction is contrary with I1.
When ground fault occurs for the electric system of non-effective earthing, residual voltage, ground path can be generated in systems
Zero-sequence current amplitude be the sum of other non-grounded line zero-sequence current amplitudes, polarity is opposite with other non-grounded lines.Small electricity
Residual voltage UL starting of the line-selected earthing device by access is flowed, is selected by zero-sequence current IL1, IL2 ... ILn of access
Line.
The adjustable alternating voltage of output is 0-40V/50Hz, and the upside on the secondary side of the transformer is that adjustable exchange becomes
Depressor, the adjusting pressuring knob are configured as adjusting the upside on the secondary side of the transformer, and the voltmeter is parallel to the transformation
The upside on the secondary side of device.Adjusting pressuring knob is surveyed for adjusting tester output adjustable voltage between 0-40V, voltmeter for observing
Try instrument output voltage numerical values recited.The residual voltage starting definite value of Small Electric Current Earthing And Routing Device can adjust, and general adjusting is
Alternating voltage is adjusted in 30V, tester output 0-40V, simulates production when the electric system of non-effective earthing is grounded
Raw residual voltage, the residual voltage for verifying Small Electric Current Earthing And Routing Device start definite value.
10V/50Hz alternating current is exported on the downside of the secondary side of the transformer, on the downside of the secondary side of the transformer described in series connection
500-1000 Ω adjustable slide rheostat, the tune stream knob are configured as adjusting the slide rheostat, and output electric current is made to exist
It is adjustable between AC10-20mA.Stream knob is adjusted to be used for for adjusting tester output adjustable current, ammeter between AC10-20mA
It observes tester and exports current values size.The 10-20mA adjustable current of the tester output had both met small current neutral grounding choosing
The sampling precision requirement of line apparatus, and meet personal safety requirement.
The tester has three output branches, is reserved as electric current output plughole after a branch series connection slide rheostat,
It is I1 that the jack, which exports electric current, and another two branches are directly reserved as electric current output plughole, and output electric current is I2, I3, the amplitude of I1
Size is the sum of I2, I3, and the polarity of I1 is opposite with I2, I3.Three branches simulate the electric system hair of non-effective earthing
Each branch zero-sequence current size and polar relationship when raw ground connection, for verifying the route selection accuracy of Small Electric Current Earthing And Routing Device.
Using the test method of the portable small current earthing wire-selecting tester, comprising:
(1) voltage output jack is connected to the U of Small Electric Current Earthing And Routing Device by connecting lineL；
(2) three electric current output plugholes are connected to the I of Small Electric Current Earthing And Routing Device by connecting lineL1、IL2…ILnWantonly three
Branch；
(3) residual voltage for adjusting adjusting pressuring knob verification Small Electric Current Earthing And Routing Device starts definite value；
(4) it adjusts stream knob and changes three electric current output plugholes and IL1、IL2…ILnWantonly three branch connection relationships school
Test the route selection accuracy of Small Electric Current Earthing And Routing Device.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (7)
1. portable small current earthing wire-selecting tester, characterized in that including shell, the surface of the shell be equipped with in shell
Test circuit be connected supply hub, power switch, voltage output jack, electric current output plughole, voltmeter, ammeter,
Adjusting pressuring knob and tune stream knob；
The test circuit includes transformer, and the main side of the transformer connects power supply while connecting with the power switch, described
The secondary side output of transformer is two sides, and upside is connected with the voltmeter and output as adjustable alternating voltage, the voltmeter
For showing output voltage numerical values recited；The downside series connection ammeter and output are alternating current, and ammeter is used to show defeated
Current values size out has three output branches, is reserved as electric current output plughole after a branch series connection slide rheostat, exports
Electric current is I1, and another two branches are directly reserved as electric current output plughole, and output electric current is I2 and I3, the amplitude size of I1 be I2 and
The polarity of the sum of I3, I1 are opposite with I2, I3；The series connection slide rheostat on the downside of the pair side.
2. portable small current earthing wire-selecting tester as described in claim 1, characterized in that the adjustable alternating voltage of output
For 0-40V/50Hz, the residual voltage generated when the electric system of non-effective earthing is grounded is simulated, for verifying small electricity
The zero sequence for flowing line-selected earthing device starts voltage definite value.
3. portable small current earthing wire-selecting tester as described in claim 1, characterized in that the slide rheostat is 500-
1000 Ω keep output electric current adjustable between AC10-20mA.
4. portable small current earthing wire-selecting tester as described in claim 1, characterized in that the secondary side of the transformer it is upper
Side is adjustable AC transformer, and the adjusting pressuring knob is configured as adjusting the upside on the secondary side of the transformer.
5. portable small current earthing wire-selecting tester as described in claim 1, characterized in that the tune stream knob is configured as
Adjust the slide rheostat.
6. portable small current earthing wire-selecting tester as described in claim 1, characterized in that on the downside of the secondary side of the transformer
Export 10V/50Hz alternating current.
7. using the test method of portable small current earthing wire-selecting tester described in claim 1, characterized in that include:
(1) voltage output jack is connected to the U of Small Electric Current Earthing And Routing Device by connecting lineL；
(2) three electric current output plugholes are connected to the I of Small Electric Current Earthing And Routing Device by connecting lineL1、IL2…ILnWantonly three branch
Road；
(3) residual voltage for adjusting adjusting pressuring knob verification Small Electric Current Earthing And Routing Device starts definite value；
(4) it adjusts stream knob and changes three electric current output plugholes and IL1、IL2…ILnWantonly three branch connection relationships verification is small
The route selection accuracy of current earthing line selection apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016112590066 | 2016-12-30 | ||
| CN201611259006 | 2016-12-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107015183A CN107015183A (en) | 2017-08-04 |
| CN107015183B true CN107015183B (en) | 2019-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710124522.6A Active CN107015183B (en) | 2016-12-30 | 2017-03-03 | Portable small current earthing wire-selecting tester and test method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843761A (en) * | 2017-11-17 | 2018-03-27 | 江门市凯拓电子有限公司 | A kind of tester with charge function |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729740Y (en) * | 2004-10-10 | 2005-09-28 | 广州智光电气有限公司 | Apparatus for detecting grounding fault of electric distribution network |
| CN1912642A (en) * | 2006-07-28 | 2007-02-14 | 徐文远 | Single-phase ground wire selecting equipment and method of neutral-point uneffect earthed system |
| CN203178470U (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Secondary circuit testing device for mutual inductor |
| CN203324404U (en) * | 2013-06-27 | 2013-12-04 | 国家电网公司 | Test circuit for small current grounding line selection device |
| CN203798929U (en) * | 2014-04-08 | 2014-08-27 | 济南置真电气有限公司 | Single-phase ground fault simulation testing platform of power distribution network |
| CN204287384U (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | A kind of microcomputer type small current earthing wire-selecting control device |
-
2017
- 2017-03-03 CN CN201710124522.6A patent/CN107015183B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2729740Y (en) * | 2004-10-10 | 2005-09-28 | 广州智光电气有限公司 | Apparatus for detecting grounding fault of electric distribution network |
| CN1912642A (en) * | 2006-07-28 | 2007-02-14 | 徐文远 | Single-phase ground wire selecting equipment and method of neutral-point uneffect earthed system |
| CN203178470U (en) * | 2013-04-27 | 2013-09-04 | 国家电网公司 | Secondary circuit testing device for mutual inductor |
| CN203324404U (en) * | 2013-06-27 | 2013-12-04 | 国家电网公司 | Test circuit for small current grounding line selection device |
| CN203798929U (en) * | 2014-04-08 | 2014-08-27 | 济南置真电气有限公司 | Single-phase ground fault simulation testing platform of power distribution network |
| CN204287384U (en) * | 2014-12-11 | 2015-04-22 | 国家电网公司 | A kind of microcomputer type small current earthing wire-selecting control device |
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| Publication number | Publication date |
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| CN107015183A (en) | 2017-08-04 |
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