CN204044249U - A kind of proving installation of stake resistance - Google Patents
A kind of proving installation of stake resistance Download PDFInfo
- Publication number
- CN204044249U CN204044249U CN201420511555.8U CN201420511555U CN204044249U CN 204044249 U CN204044249 U CN 204044249U CN 201420511555 U CN201420511555 U CN 201420511555U CN 204044249 U CN204044249 U CN 204044249U
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- voltage
- pole
- wiring pile
- electric current
- voltage pole
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- 238000009434 installation Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 20
- 238000005259 measurement Methods 0.000 abstract description 7
- 230000002452 interceptive effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- 206010014357 Electric shock Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- Measurement Of Resistance Or Impedance (AREA)
Abstract
The utility model provides a kind of proving installation of stake resistance, is provided with earthing device, voltage pole and electric current pole, is also provided with the first voltage pole wiring pile, grounded screen wiring pile, the second voltage pole wiring pile, electric current pole wiring pile; Draw lead-in wire from earthing device and be connected to described first voltage pole wiring pile and grounded screen wiring pile, described voltage pole connects the second voltage pole wiring pile, and described electric current pole connects electric current pole wiring pile through switch.After described switch is closed, voltage is detected in measuring voltage pole, and described detection voltage is containing interference voltage; After described switch disconnects, measuring voltage pole interference voltage.The utility model can effective each interfering frequency of filtering, obtains the measurement result of stake resistance accurately, has that test speed is fast, test data stable, the accurate effect of test result.
Description
Technical field
The utility model relates to the technical field of test stake resistance, particularly relates to a kind of proving installation of stake resistance.
Background technology
To the test of stake resistance, be that earth work final acceptance of construction and electrical safety check indispensable step.
Grounding resistance is validity, the security of confirmation earthed system and identifies whether earthed system meets the important parameter of designing requirement.If imperfect earth, gently then damage consumer electronics equipment, heavy then can fire hazard etc., heavy losses are caused to the property of people and life security.The accuracy of grounding resistance measurement, directly affects lightningproof protection, the reliability affecting electrical equipment work and personal safety protection.But, general stake resistance surrounding environment more complicated, the interfering frequency of background environment becomes increasingly complex, as there is high-power reactive power compensator, near electric railway and big machinery processing plant area etc., not only Hz noise is very strong, and the interference around power frequency is also very strong, now as adopted alien frequencies method or frequency variation method etc., the impact of interference cannot be eliminated, and meter reading saltus step, be difficult to read standard, cause measurement result to there is very big error.In order to suppress Hz noise, classic method adopts power frequency heavy-current method to measure.In order to prevent the Hz noise produced during operation of power networks, improve the accuracy of measurement result, insulation preventive trial regulations stipulate: the test current of power frequency heavy-current method must not be less than 30 amperes.Thus, adopt this kind of method, surveying instrument is very heavy, and current feed is very thick, and survey crew working strength is large, have Danger Electric shock risk, and instrumentation is complicated, and Measuring Time is long.
Utility model content
The utility model provides a kind of proving installation of stake resistance, can effective each interfering frequency of filtering, obtains the measurement result of stake resistance accurately.
For achieving the above object, technical solution adopted in the utility model is:
The utility model provides a kind of proving installation of stake resistance, is provided with earthing device, voltage pole and electric current pole, is also provided with the first voltage pole wiring pile, grounded screen wiring pile, the second voltage pole wiring pile, electric current pole wiring pile; Draw lead-in wire from earthing device and be connected to described first voltage pole wiring pile and grounded screen wiring pile, described voltage pole connects the second voltage pole wiring pile, and described electric current pole connects electric current pole wiring pile through switch.
Further, after described switch is closed, voltage is detected in measuring voltage pole, and described detection voltage is containing interference voltage;
After described switch disconnects, measuring voltage pole interference voltage.
Adopt proving installation of the present utility model, there is the effect that surveying instrument is light, current feed is comparatively thin, the safety of guarantee survey crew, instrumentation are easy, shorten Measuring Time, and test speed is fast, test data stable, test result is accurate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the proving installation of stake resistance of the present utility model.
Embodiment
Specifically illustrate embodiment of the present utility model below in conjunction with accompanying drawing, accompanying drawing is only for reference and use is described, does not form the restriction to the utility model scope of patent protection.
As shown in Figure 1, the present embodiment provides a kind of proving installation of stake resistance, be provided with earthing device G,
Voltage pole P and electric current pole C, is also provided with the first voltage pole wiring pile P1, grounded screen wiring pile C1, P1, the second voltage pole wiring pile P2, electric current pole wiring pile C2; Draw lead-in wire from earthing device G and be connected to described first voltage pole wiring pile P1 and grounded screen wiring pile C1, P1, described voltage pole P connects the second voltage pole wiring pile P2, and described electric current pole C connects electric current pole wiring pile C2 through K switch 1.
After described K switch 1 is closed, at the first Measuring Time point T1, voltage is detected in measuring voltage pole, and described detection voltage is containing interference voltage;
After described K switch 1 disconnects, at the second Measuring Time point T2, measuring voltage pole interference voltage.
The course of work of the proving installation of the stake resistance that the present embodiment provides is:
In the present embodiment, 12 AD that selected instrument uses, the highest measuring accuracy can reach 0.2 milliohm, and numerical precision to get after radix point 3.The value of gained VT1 and VT2 is after being converted by FFT, at frequency 128Hz, and the actual value tested under constant current 0.1A;
(1) instrument test electrode G is connected to switchgear building by geodesic line, electrode P is inserted into from test 0.3 meter, ground wire 9 meter Chu underground, and electrode C is inserted into from test 0.3 meter, ground wire 15 meter Chu underground, and three test electrodes are arranged in a linear;
(2) the manual measurement of apparatus selection, test voltage is selected in 20V gear (constant current 1A);
(3) when measuring, K1 closes, and instrument, by galvanic electrode C, sends constant measurement electric current I 1 when fixed frequency f1, measures this magnitude of voltage of detection voltage VT1(comprise interference voltage at voltage pole P);
(4) after disconnecting K1, the constant current detecting this voltage of voltage VT2(and do not have instrument to send is measured at voltage pole P, just interference voltage);
(5) FFT conversion (being exactly frequency-domain analysis) is carried out respectively to VT1 and VT2, take out the component under instrument f1 respectively, voltage under the apparatus measures electric current of VT1-f1(frequency f 1 and interference voltage sum) and the interference voltage of VT2-f1(frequency f 1), the true measuring voltage V=(VT1-f1 of instrument)-(VT2-f1), draw not have noisy actual voltage value, then calculate stake resistance resistance R divided by continuous current I.
Table 1 is the concrete test data of the present embodiment:
Table 2 is that this earth resistance tester contrasts with the test result of VICIOR6412 earth resistance tester
Can find through test comparison, the earth resistance tester of the utility model design, test speed is fast, test data is stable, test result is accurate.
Above disclosedly be only preferred embodiment of the present utility model, rights protection scope of the present utility model can not be limited with this, therefore according to the equivalent variations that the utility model claim is done, still belong to the scope that the utility model is contained.
Claims (2)
1. a proving installation for stake resistance, is provided with earthing device, voltage pole and electric current pole, it is characterized in that: be also provided with the first voltage pole wiring pile, grounded screen wiring pile, the second voltage pole wiring pile, electric current pole wiring pile; Draw lead-in wire from earthing device and be connected to described first voltage pole wiring pile and grounded screen wiring pile, described voltage pole connects the second voltage pole wiring pile, and described electric current pole connects electric current pole wiring pile through switch.
2. the proving installation of stake resistance according to claim 1, is characterized in that: after described switch is closed, voltage is detected in measuring voltage pole, and described detection voltage is containing interference voltage; After described switch disconnects, measuring voltage pole interference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511555.8U CN204044249U (en) | 2014-09-05 | 2014-09-05 | A kind of proving installation of stake resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420511555.8U CN204044249U (en) | 2014-09-05 | 2014-09-05 | A kind of proving installation of stake resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204044249U true CN204044249U (en) | 2014-12-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420511555.8U Expired - Lifetime CN204044249U (en) | 2014-09-05 | 2014-09-05 | A kind of proving installation of stake resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204044249U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181398A (en) * | 2014-09-05 | 2014-12-03 | 厦门大恒科技有限公司 | Ground resistance testing device and method |
| CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
-
2014
- 2014-09-05 CN CN201420511555.8U patent/CN204044249U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104181398A (en) * | 2014-09-05 | 2014-12-03 | 厦门大恒科技有限公司 | Ground resistance testing device and method |
| CN104777368A (en) * | 2015-05-05 | 2015-07-15 | 成都电兴科技有限责任公司 | On-line monitoring instrument and detection method of alternating current variable-frequency ground resistor |
| CN104777368B (en) * | 2015-05-05 | 2016-03-02 | 成都电兴科技有限责任公司 | AC frequency conversion stake resistance on-line computing model and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141224 |
|
| CX01 | Expiry of patent term |