CN201965184U - Split type grounding downlead conduction resistance test instrument - Google Patents
Split type grounding downlead conduction resistance test instrument Download PDFInfo
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- CN201965184U CN201965184U CN201020692787XU CN201020692787U CN201965184U CN 201965184 U CN201965184 U CN 201965184U CN 201020692787X U CN201020692787X U CN 201020692787XU CN 201020692787 U CN201020692787 U CN 201020692787U CN 201965184 U CN201965184 U CN 201965184U
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Abstract
The utility model relates to a split type grounding downlead conduction resistance test instrument, which comprises two parts: a host machine and a handheld end, wherein a display screen, a measuring fork, a handheld handle and a wiring opening are arranged on the handheld end, the voltage and current output end on the host machine is connected with the wiring opening of the handheld end, the input end of the host machine is connected with the reference end of a grounding downlead detection point, and the measuring fork of the handheld end is connected with the other end of the grounding downlead detection point. The split type grounding downlead conduction resistance test instrument has the advantages that test results can be directly read at the wiring end, the work load of observing the test results to and fro is avoided, the measuring radius is large, the test current is heavy, the influence of the contact resistance can be eliminated, the measurement range is wide, the precision is high, the liquid crystal display (LCD) is adopted, the reading is visual, the repeatability is good, and in addition, the split type grounding downlead conduction resistance test instrument has a warning prompt function and is applicable to the measurement of characteristic parameters of grounding downleads of grounding device such as power stations, transformer substations, microwave towers and the like.
Description
Technical field
The utility model relates to a kind of electric testing instrument, is specially a kind of split type down conductor conducting resistance tester that is applied to the power equipment grounding resistance measurement.
Background technology
Down conductor is the coupling part of power equipment and earth mat, plays a part required grounded part of electrical equipment and grounded screen UNICOM.The down conductor of power equipment is the basic assurance of equipment safety operation with reliable, the effective connection of earth mat.Though when making earthing device, to the down conductor junction, done preservative treatment, but be arranged in the point of contact of soil, still can be subjected to the influence of factors such as humidity for a long time, corrosion phenomena occurs, this downlead and earth mat contact point resistance are raise, can not reach the requirement of electric power rules.This equipment is in operation like this, just can have unsafe potential faults, when serious, can make the operation of equipment lost territory, and burning apparatus causes personal injury for operation of equipment and maintainer.
Point out in " preventing 25 important requirements of electrical production major accident ": the earthing device downlead is by detecting the break-make situation that can find down conductor, simultaneously can judge the degree that it is corroded by the variation of resistance, and all previous measured result analyzed comparison, determine whether excavation, handle.The conduction detection work of earthing device downlead should once go forward side by side every year line item, analysis.Regulation in " power equipment preventive trial rules ": the conduction detection work of earthing device downlead should be carried out once every year.Analyze comparison according to all previous measured result, whether need to excavate, handle with decision.
Down conductor conducting resistance tester is the important component part that earthing device characterisitic parameters such as power plant, electric substation are measured, and is mainly used in the measurement of electrical equipment down conductor on state characteristic.On the power transmission engineering two kinds of methods are mainly adopted in the measurement of down conductor resistance: it is the megger method that three electrode method is generally adopted in the measurement of shaft tower power frequency earthing resistance; For the daily servicing and the stake resistance preventive inspection of shaft tower, generally adopt the split-core type meter method to measure.Traditional continuity test instrument needs 2 to 3 people to finish the overall process of test generally speaking, if will reduce the quantity of survey crew, need survey crew after ground connection is drawn the good circuit of resistance one termination, to get back to the demonstration situation that tester is checked data in the process of test, the workload and the labour intensity of test are very large, and simultaneously-measured efficient also is low-down.
Summary of the invention
The utility model provides a kind of split type down conductor conducting resistance tester at the existing deficiency of existing down conductor conducting resistance tester.
Technical solution of the present utility model is: a kind of split type down conductor conducting resistance tester, comprise main frame (1) and handheld terminal (2) two parts, handheld terminal (2) is provided with display screen (3), measures fork (4), hand holding handle (5) and connection jaws (6), main frame (1) is gone up voltage, current output terminal (V-, L-) is connected with the connection jaws (6) of handheld terminal (2), the input end of main frame (1) (V+, L+) is connected with the reference edge (A) of down conductor check point (R), and the measurement fork (4) of handheld terminal (2) is connected with down conductor check point (R) other end (B).
Host machine part of the present utility model is finished collection, the analysis part of data, then data result is turned back to handheld terminal and partly realizes.So just, save survey crew running back and forth in test process, reduced workload.The utility model host machine part is the back belt type mainframe box that independent research is produced simultaneously, not only test data is accurate, directly perceived, stable, and the quantity of reducing the tester greatly, only need a people just can finish the overall process of whole test, solved the cost lifting problem that personnel's expense is brought.The utility model has overcome a series of defectives such as the method for testing that exists with quasi-instrument is loaded down with trivial details, working strength is high, degree of accuracy is low, increases work efficiency by the change of test parameter display position simultaneously, reduces working strength, minimizing personnel configuration.The utility model adopts battery and two kinds of power supply modes of external power source, adopts the measuring principle of four-wire method to get rid of the influence of p-wire resistance to test result effectively, and can directly obtain measuring loop micro-phm level electric resistance data.The utility model is selected up-to-date high-acruracy survey circuit for use, and it is strong to have an antijamming capability, testing efficiency height, advantage such as staffing is few, and is easy to operate, and test data is rapid, accurate.
The utility model can have been exempted observation test result's back and forth work load in the direct read test result of handheld terminal; The measurement radius is big, reaches as high as 50 meters; Measuring current is big, and maximum can reach 10A, and the method that four lines are measured can be eliminated the influence of contact resistance: measurement range is wide, and range can reach 0～1999m Ω; Precision height, resolution reach 1 μ Ω; The LCD liquid crystal display, reading is directly perceived, good reproducibility and prompt functions is arranged; Adopt external and built-in two kinds of power supply modes, easy to carry, the built-in DC24V power supply of external AC220V; Be applicable to the measurement of the characterisitic parameter of earthing device down conductors such as generating plant, transformer station, microwave tower.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model.
Fig. 2 is the structural representation of handheld test end in the utility model.
Embodiment
As shown in Figure 1, 2, the utility model comprises main frame 1 and handheld terminal 2 two parts, handheld terminal 2 is provided with display screen 3, measures fork 4, hand holding handle 5 and connection jaws 6, voltage, current output terminal V-, L-are connected with the connection jaws 6 of handheld terminal 2 on the main frame 1, input end V+, the L+ of main frame 1 is connected with the reference edge A of down conductor check point R, and the measurement of handheld terminal 2 fork 4 is connected with down conductor check point R other end B.
Down conductor conducting resistance tester main frame 1 is four terminal formula instrument, employing be the measuring principle of four-wire method.Electric current and the voltage that is added in the down conductor two ends in the down conductor conducting resistance tester main frame 1 sampling measurement circuit, is digital signal by the A/D converter with data conversion, deliver to Single Chip Microcomputer (SCM) system analysis, draw the resistance value of down conductor, and this result is delivered on the display screen 3 of handheld terminal 2 and show.
Present embodiment adopts constant flow method to carry out the down conductor resistance test, and the Single Chip Microcomputer (SCM) system of down conductor conducting resistance tester main frame 1 inside realizes that by D/A converter and V/I converter and power amplification circuit the constant current of power supply powers.
Use the concrete measuring process of split type down conductor conducting resistance tester as follows:
1. because the difference of measure field, when measuring, should earlier the slotted line on the wire spool be decontroled and carry out the short-circuit resistance verification after stretching.
2. find out with earth mat and connect qualified downlead as reference point (method of available survey stake resistance is found out reference point)
3. use two slotted lines of instrument autogamy (4 meters, 46 meters), an end insert the instrument junction block (red plug inserts the positive pole of corresponding voltage/current, the black plug insert voltage the negative pole of electric current).
4. in order to eliminate the influence of contact point resistance to test, should handle the measured point surface of contact well when measuring, tested down conductor is measured with handheld terminal and is pitched 4, should use the file antirust paint of rasping away, and exposes glossiness metal.
5. the hand-held handheld terminal 2 of tester is surveyed the down conductor measurement point with measuring fork 4 contacts, reads measurement result from display screen 3, continues to move to next measurement point then and measures.
The utility model has been exempted the work expense of commute observation data between terminals and Test Host, and assurance is provided for reducing the staff.Adopt the utility model, a people just can finish and need 2～3 test assignments that the people could finish originally.The utility model is measured radius can reach 50 meters; Measuring current is big, and maximum can reach 10A, and can eliminate the influence of contact resistance: measurement range is wide, and range can reach 0～1999m Ω; Precision height, resolution reach 1 μ Ω; The LCD liquid crystal display, reading is directly perceived, good reproducibility and prompt functions is arranged; Adopt external and built-in two kinds of power supply modes, the built-in DC24V power supply of external AC220V; Popularization of the present utility model will greatly promote the efficient of the characterisitic parameter surveying work of earthing device down conductors such as generating plant, transformer station, microwave tower.
Claims (1)
1. split type down conductor conducting resistance tester, comprise main frame (1) and handheld terminal (2) two parts, it is characterized in that: handheld terminal (2) is provided with display screen (3), measures fork (4), hand holding handle (5) and connection jaws (6), main frame (1) is gone up voltage, current output terminal (V-, L-) is connected with the connection jaws (6) of handheld terminal (2), the input end of main frame (1) (V+, L+) is connected with the reference edge (A) of down conductor check point (R), and the measurement fork (4) of handheld terminal (2) is connected with down conductor check point (R) other end (B).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020692787XU CN201965184U (en) | 2010-12-28 | 2010-12-28 | Split type grounding downlead conduction resistance test instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020692787XU CN201965184U (en) | 2010-12-28 | 2010-12-28 | Split type grounding downlead conduction resistance test instrument |
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| Publication Number | Publication Date |
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| CN201965184U true CN201965184U (en) | 2011-09-07 |
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| CN201020692787XU Expired - Fee Related CN201965184U (en) | 2010-12-28 | 2010-12-28 | Split type grounding downlead conduction resistance test instrument |
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| CN (1) | CN201965184U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792432A (en) * | 2014-01-15 | 2014-05-14 | 北京东方计量测试研究所 | Earth resistance meter and handheld terminal |
| CN104914315A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Resistance tester |
| CN106291118A (en) * | 2016-07-29 | 2017-01-04 | 国网山东省电力公司青州市供电公司 | Arrester ground lead-in wire monitoring warning device and monitoring and pre-alarming method thereof |
| CN106771631A (en) * | 2016-12-27 | 2017-05-31 | 西安亚能电气有限责任公司 | A kind of down conductor conducting resistance test device |
| CN107015097A (en) * | 2017-04-28 | 2017-08-04 | 国网河南省电力公司电力科学研究院 | A kind of single wireless measurement device of down conductor conduction |
| CN109100573A (en) * | 2018-10-09 | 2018-12-28 | 广东电网有限责任公司 | A kind of earthing test handheld terminal |
| CN112557805A (en) * | 2020-10-29 | 2021-03-26 | 广西电网有限责任公司南宁供电局 | Auxiliary device and method for quickly searching faults of overhead line |
| CN114137340A (en) * | 2021-11-23 | 2022-03-04 | 广西电网有限责任公司来宾供电局 | Transformer substation conduction tester with remote control function |
-
2010
- 2010-12-28 CN CN201020692787XU patent/CN201965184U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792432A (en) * | 2014-01-15 | 2014-05-14 | 北京东方计量测试研究所 | Earth resistance meter and handheld terminal |
| CN104914315A (en) * | 2015-06-01 | 2015-09-16 | 苏州市华安普电力工程有限公司 | Resistance tester |
| CN106291118A (en) * | 2016-07-29 | 2017-01-04 | 国网山东省电力公司青州市供电公司 | Arrester ground lead-in wire monitoring warning device and monitoring and pre-alarming method thereof |
| CN106771631A (en) * | 2016-12-27 | 2017-05-31 | 西安亚能电气有限责任公司 | A kind of down conductor conducting resistance test device |
| CN107015097A (en) * | 2017-04-28 | 2017-08-04 | 国网河南省电力公司电力科学研究院 | A kind of single wireless measurement device of down conductor conduction |
| CN107015097B (en) * | 2017-04-28 | 2023-04-07 | 国网河南省电力公司电力科学研究院 | Single wireless measuring device of ground connection downlead conductivity |
| CN109100573A (en) * | 2018-10-09 | 2018-12-28 | 广东电网有限责任公司 | A kind of earthing test handheld terminal |
| CN112557805A (en) * | 2020-10-29 | 2021-03-26 | 广西电网有限责任公司南宁供电局 | Auxiliary device and method for quickly searching faults of overhead line |
| CN114137340A (en) * | 2021-11-23 | 2022-03-04 | 广西电网有限责任公司来宾供电局 | Transformer substation conduction tester with remote control function |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Split type grounding downlead conduction resistance test instrument Effective date of registration: 20141030 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2014990000906 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20151015 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2014990000906 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Split type grounding downlead conduction resistance test instrument Effective date of registration: 20151019 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2015990000877 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20161020 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2015990000877 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Split type grounding downlead conduction resistance test instrument Effective date of registration: 20161020 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2016990000883 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171103 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2016990000883 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Split type grounding downlead conduction resistance test instrument Effective date of registration: 20171120 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2017610000152 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20181210 Granted publication date: 20110907 Pledgee: Xi'an innovation financing Company limited by guarantee Pledgor: XI'AN YACAN ELECTRIC CO., LTD. Registration number: 2017610000152 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20191228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |