CN207965118U - The special graded resistance detection check device of circuit resistance tester - Google Patents
The special graded resistance detection check device of circuit resistance tester Download PDFInfo
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- CN207965118U CN207965118U CN201820487983.XU CN201820487983U CN207965118U CN 207965118 U CN207965118 U CN 207965118U CN 201820487983 U CN201820487983 U CN 201820487983U CN 207965118 U CN207965118 U CN 207965118U
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Abstract
The utility model is related to the technical fields of electric system, more particularly, to the special graded resistance detection check device of circuit resistance tester.The special graded resistance detection check device of circuit resistance tester, wherein the insulating support rod including shell, in shell, the resistance on insulating support rod are set to ohmically multiple gears, and each gear is equipped with gear tap.The utility model allows to the loopback value approximate range according to tested device, early period carries out proximity verification using the device, to verify the accuracy of circuit resistance tester, and the practical loop resistance test value of tested device that is more accurate, having conviction power can be obtained, it takes precautions against because loop resistance tests the inaccurate equipment operation risk generated.
Description
Technical field
The utility model is related to the technical fields of electric system, more particularly, to the special classification of circuit resistance tester
Resistance detection calibration equipment.
Background technology
In electric system, galvanic circle the resis tance method of surveying is as a kind of most basic preventive trial side of various switchgears
Method has extremely important effect to the stable operation of electric system.Cause due to contact surface oxidation, contact fastening are bad etc.
Contact resistance increases, and when high current flows through, contact point temperature increases, it will accelerates contact surface oxidation, makes contact resistance into one
Step increases, and major accident will be generated by continuing, therefore, it is necessary to which the galvanic circle resistance to equipment carries out routine test.
According to《Electric power apparatus examination testing regulations》It is required that preventative examination need to be carried out to the vacuum circuit breaker in power industry
It tests, is measured with direct current pressure drop method, electric current is not less than 100A, is provided according to actual conditions in operation, it is proposed that no more than 1.2 times manufactures
Value.Breaker, the busbar etc. of GIS air insulating devices are also needed to carry out galvanic circle resistance test, test result should meet system
It is fixed to make factory rules and regulations.Because being not less than 100A by electric current, the loop resistance of equipment under test is usually several micro-ohms to hundreds of micro-ohms, and scene is surveyed
When examination, need in voltage tester is clipped in, testing current be clipped in it is outer, it is more accurate to test to obtain and after carrying out grinding process
Loop resistance value.However, even if testing according to the method, different instruments to the loop resistance test value of same equipment still not
Identical, deviation is larger sometimes, floats more apparent, for the order of magnitude originally circuit of smaller micro-ohm grade, test result
Inaccurately, lack an accurate calibration link.
Currently, the circuit resistance tester in mainstream producer in the market or technology is by a code test resistance
It is verified, which has 150 micro-ohms, 375 micro-ohms, 750 micro-ohms etc. several, and check results are single, test result
Accuracy cannot more science, rationally, accurate verification.Therefore, it is necessary in existing circuit resistance tester product or
It in person's technical foundation, increases special graded resistance detection check device newly, passes through the device so that, can be right before test tested device
The test accuracy of instrument is verified, and accurate test result is desirably to obtain, and it is accurate to be carried out to the operation health status of equipment
Judge.
Comprehensive multinomial existing patent and technology analysis, the prior art do not design the resistance school before circuit resistance tester test
Experiment device, or only single resistance are once verified, for the loop resistance value of tested device micro-ohm grade, it is clear that existing
Technology is difficult to accurately be verified before testing, and then carries out having the accurate test for convincing power.
Utility model content
The utility model is at least one defect overcome described in the above-mentioned prior art, and it is special to provide circuit resistance tester
Graded resistance detection check device so that can be carried out using the device according to the loopback value approximate range of tested device, early period
Proximity verifies, and to verify the accuracy of circuit resistance tester, and can obtain tested device that is more accurate, having conviction power
Practical loop resistance test value is taken precautions against because loop resistance tests the inaccurate equipment operation risk generated.
The technical solution of the utility model is：The special graded resistance detection check device of circuit resistance tester, wherein packet
It includes shell, the insulating support rod in shell, the resistance on insulating support rod, be set to ohmically multiple gears, institute
The each gear stated is equipped with gear tap.
Further, the resistance is 800 micro-ohms.The gear is 11 gears, and each gear draws one
Tap is weldingly fixed on the underface that Package casing is marked with the terminal of micro-ohm value after insulation is wrapped up.
In the utility model, including resistance that total size is 800 micro-ohms, two insulating support rods, it can be grounded
Package casing, gear tap, four parts composition.Wherein, resistance shares 0 micro-ohm（0 grade）, 10 micro-ohms（1 grade）, 20 micro-ohms（2 grades）、
30 micro-ohms（3 grades）, 40 micro-ohms（4 grades）, 50 micro-ohms（5 grades）, 100 micro-ohms（6 grades）, 200 micro-ohms（7 grades）, 300 micro-ohms（8 grades）、
500 micro-ohms（9 grades）, 800 micro-ohms（10 grades）11 gears, each gear draw a tap, and after insulation is wrapped up, welding is solid
Be scheduled on the underface that Package casing is marked with the terminal of micro-ohm value, when test by the red of circuit resistance tester device, black voltage,
Electric current folder respectively clamping connection at 0 micro-ohm terminal with verification terminal, you can size is estimated according to tested circuit and carries out close time of early period
The verification of road value.
Compared with prior art, advantageous effect is：The utility model allows to according to the loopback value of tested device substantially
Range, early period carry out proximity verification using the device, to verify the accuracy of circuit resistance tester, and can obtain more
Accurately, there is the practical loop resistance test value of tested device for convincing power, take precautions against because loop resistance tests the inaccurate equipment generated
Operation risk.
Description of the drawings
Fig. 1 is the utility model overall structure diagram.
Specific implementation mode
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；It is attached in order to more preferably illustrate the present embodiment
Scheme certain components to have omission, zoom in or out, does not represent the size of actual product；To those skilled in the art,
The omitting of some known structures and their instructions in the attached drawings are understandable.Being given for example only property of position relationship described in attached drawing
Illustrate, should not be understood as the limitation to this patent.
As shown in Figure 1, including the resistance that a total size is 800 micro-ohms（Figure label is 1）, two pieces insulating support rods
（Figure label is 2）, the Package casing that can be grounded（Figure label is 3）, gear tap（It is 0 grade that figure label, which is 4, figure
In marked as 5 be 10 grades, from 0 grade to 10 grade be followed successively by 1 to 9 grades）Four parts form.Wherein, resistance share 0 micro-ohm,
10 micro-ohms, 20 micro-ohms, 30 micro-ohms, 40 micro-ohms, 50 micro-ohms, 100 micro-ohms, 200 micro-ohms, 300 micro-ohms, 500 micro-ohms, 800 micro-ohms ten
One gear, each gear draw a tap, after insulation is wrapped up, are weldingly fixed on the end that Package casing is marked with micro-ohm value
The underface of son, when test by the red of circuit resistance tester device, black voltage, electric current folder respectively clamping connection 0 micro-ohm terminal with
It verifies at terminal, you can the verification that size carries out close loopback value early period is estimated according to tested circuit.
Obviously, above-described embodiment of the utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to the embodiment of the utility model.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
It is exhaustive.All any modification, equivalent and improvement made within the spirit and principle of the present invention etc., should be included in
Within the protection domain of the utility model claims.
Claims (3)
1. the special graded resistance detection check device of circuit resistance tester, which is characterized in that including shell（3）, be set to shell
（3）Interior insulating support rod（2）, be set to insulating support rod（2）On resistance（1）, be set to resistance（1）On multiple gears, institute
The each gear stated is equipped with gear tap.
2. the special graded resistance detection check device of circuit resistance tester according to claim 1, it is characterised in that：Institute
The resistance stated（1）For 800 micro-ohms.
3. the special graded resistance detection check device of circuit resistance tester according to claim 1, it is characterised in that：Institute
The gear stated is 11 gears, and each gear draws a tap, after insulation is wrapped up, is weldingly fixed on Package casing subscript
There is the underface of the terminal of micro-ohm value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820487983.XU CN207965118U (en) | 2018-04-08 | 2018-04-08 | The special graded resistance detection check device of circuit resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820487983.XU CN207965118U (en) | 2018-04-08 | 2018-04-08 | The special graded resistance detection check device of circuit resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207965118U true CN207965118U (en) | 2018-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820487983.XU Active CN207965118U (en) | 2018-04-08 | 2018-04-08 | The special graded resistance detection check device of circuit resistance tester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444544A (en) * | 2018-11-02 | 2019-03-08 | 国网辽宁省电力有限公司丹东供电公司 | A kind of portable constant temperature D.C. resistance calibration equipment |
-
2018
- 2018-04-08 CN CN201820487983.XU patent/CN207965118U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444544A (en) * | 2018-11-02 | 2019-03-08 | 国网辽宁省电力有限公司丹东供电公司 | A kind of portable constant temperature D.C. resistance calibration equipment |
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