CN109444544A - A kind of portable constant temperature D.C. resistance calibration equipment - Google Patents
A kind of portable constant temperature D.C. resistance calibration equipment Download PDFInfo
- Publication number
- CN109444544A CN109444544A CN201811303342.5A CN201811303342A CN109444544A CN 109444544 A CN109444544 A CN 109444544A CN 201811303342 A CN201811303342 A CN 201811303342A CN 109444544 A CN109444544 A CN 109444544A
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- resistance
- constant temperature
- resistance calibration
- calibration device
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- 238000005057 refrigeration Methods 0.000 claims abstract 2
- 239000010410 layer Substances 0.000 claims description 19
- 239000004973 liquid crystal related substance Substances 0.000 claims description 10
- 239000000523 sample Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000003063 flame retardant Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical group N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 claims description 2
- 238000012360 testing method Methods 0.000 abstract description 24
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012795 verification Methods 0.000 description 6
- 238000004804 winding Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000036760 body temperature Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052895 riebeckite Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
一种携带型恒温直流电阻校验装置，包括箱体和设置在其内部的的恒温控制装置与电阻校验装置，恒温控制装置由控制装置分别与感温探头和设置在箱体内壁的加热装置以及制冷装置连接组成，电阻校验装置包括回路电阻测试装置和直流电阻测试装置。本发明的有益效果：携带方便，通过调节控制装置内的温湿度，确保标准电阻在恒温状态下阻值不变，校验误差小，确保校验精度，提高试验效率。
A portable constant temperature direct current resistance calibration device, comprising a box body and a constant temperature control device and a resistance calibration device arranged inside the constant temperature control device. And the refrigeration device is connected, and the resistance calibration device includes a loop resistance test device and a DC resistance test device. The beneficial effects of the invention are as follows: it is convenient to carry, and by adjusting the temperature and humidity in the control device, the resistance value of the standard resistor is guaranteed to remain unchanged under a constant temperature state, the calibration error is small, the calibration accuracy is ensured, and the test efficiency is improved.
Description
Technical field
The present invention relates to a kind of portable constant temperature D.C. resistance calibration equipments, are suitable for electric system electrical equipment high pressure and try
Test detection accuracy field-checking field.
Background technique
Power system transformer substation equipment, such as: power transformer, reactor, current transformer, voltage transformer and discharge lines
The equipment windings such as circle are according to national standards and industry correlation regulatory requirements must carry out D.C. resistance test, and switch (breaker) must
It must carry out contact resistance test etc..According to routine, instrument for measuring DC resistance and circuit resistance tester etc. must all be transported every year
It is once verified to qualified place, looks at whether accuracy of instrument meets national standard or industry standard.For power train
For system, general each provinces, autonomous regions and municipalities have the special calibration authority for meeting national measurement requirement to be responsible for these
Test equipment carries out special detection, verification, provides instrument to the qualified instrument for measuring DC resistance of verification and circuit resistance tester
Instrument assay certificate.
As city, rural area, enterprise, residential electricity consumption demand are different, power system transformer substation is distributed more widely, especially in
The substation in mountain area small towns, far apart from urban district, close substation has tens kilometers, and there is hundreds of kilometer in remote substation.According to
National standard and industry regulation checking experiment cycle request, electric system maintenance and testing crew need to determine running equipment
The repair and maintenance and high-potting of phase.
Substation equipment during the test, is frequently found tested device data exception, in order to search abnormal data source,
Test equipment bring error is excluded, needs to carry out to carry out field-checking to instrument for measuring DC resistance and circuit resistance tester,
Improve detection accuracy, it is ensured that power equipment is run without hidden danger.
Electric system does not carry out the device that instrument for measuring DC resistance is verified, these calibration equipments one to for scene
As all in standard test room, for circuit resistance tester verification Traditional Method all use producer provide 100 amperes of milliohm grades
Criteria check resistance, this exposed " criteria check resistance " is different with spring, summer, autumn and winter temperature, and change in resistance is larger, causes
Circuit resistance tester field-checking error is big.
A kind of easy to carry, temperature and humidity variation can such as be developed and comply with standard (the laboratory constant temperature ring verified close to instrument
Border), measuring resistance is mounted on inside, scene is just able to satisfy and instrument for measuring DC resistance and circuit resistance tester is carried out at any time
The target of verification, so that it is guaranteed that measuring accuracy, while can also improve test efficiency.
Summary of the invention
In order to ensure measuring accuracy and test efficiency is improved, invents a kind of portable constant temperature D.C. resistance calibration equipment, skill
Art scheme is as follows:
A kind of portable constant temperature D.C. resistance calibration equipment, including cabinet and the thermostatically-controlled equipment being provided at its inner portion and electricity
Hinder calibration equipment, thermostatically-controlled equipment by control device respectively with temperature-sensing probe and be arranged in cabinet wall heating device and
Refrigerating plant connection composition, resistance calibration equipment includes loop resistance test device and D.C. resistance test device.
Loop resistance test device is by the 100kV that the intracorporal 100A measuring resistance of case is arranged in Yu is arranged on cabinet panel
Terminal stud connection composition.
D.C. resistance calibration equipment is by the 5A- that the intracorporal 5A-20A measuring resistance of case is arranged in Yu is arranged on cabinet panel
20A terminal stud connection composition.
Device of transferring the files is provided on cabinet panel to connect by the intracorporal conversion gear device of case with resistance calibration equipment.
It converts gear device and uses rotary switch structure.
Cabinet outer layer is protective layer made of hard material, and middle layer is insulating layer, and internal layer is flame-retardant layer.
Control selections key and liquid crystal display are provided on cabinet panel, with the control device being arranged in inside thermal-insulating body
It is connected.
Box house is provided with power supply device and connect with control device.
Device of transferring the files is the measuring resistance changeover panel indicated with scale.
100A measuring resistance 5 is mainly the criteria check resistance for verifying circuit resistance tester and providing.
5A -20A measuring resistance 6 is mainly the criteria check resistance group that instrument for measuring DC resistance provides.
Control selections key and liquid crystal display are provided on cabinet panel, with the control device being arranged in inside thermal-insulating body
It is connected, is used cooperatively by liquid crystal display and control selections key, can accurately grasps temperature constant state and verified measuring resistance
With test current conditions, it is ensured that checking precision.
The power supply device of box house is 220V AC power source adapter or 12V DC rechargeable lithium battery, when scene does not have
In the case where having AC power source, it can guarantee that device operates normally using 12V DC lithium battery.
Compared with prior art, beneficial effects of the present invention: it is easy to carry, by the temperature and humidity in control set for adjusting,
Ensure that measuring resistance resistance value under temperature constant state is constant, verification error is small, it is ensured that checking precision improves test efficiency.
Detailed description of the invention
Fig. 1 is portable constant temperature D.C. resistance calibration equipment overall structure diagram；
Fig. 2 is portable constant temperature D.C. resistance calibration equipment box structure diagram；
Fig. 3 is portable constant temperature D.C. resistance calibration equipment electrical structure block diagram；
1, power supply device, 2, control device, 3, heating device, 4, refrigerating plant, 5,100A measuring resistance, 6,5A-20A standard electric
Resistance, 7, conversion gear device, 8, device of transferring the files, 9,100kV terminal stud, 10,5A-20A terminal stud, 11, control selections key,
12, power switch, 13, liquid crystal display, 14, temperature-sensing probe, 15, incubator aluminum alloy casing, 16, insulation case lid, 17, fluffy glue
Insulating layer, 18, asbestos layer.
Specific embodiment
Embodiment 1
When as shown in Figure 1, Figure 2, Figure 3 shows, for brake switch tester, i.e. circuit resistance tester field-checking: loop resistance is surveyed
Examination instrument output is connected on 100A terminal stud 9, is connected to 100A measuring resistance 5, and electric power switch 12 is opened, and temperature-sensing probe 14 will
Temperature data is sent to control device 2 in the cabinet detected, and liquid crystal display 13 reads temperature data from control device 2
And show, it presses control selections key 11 at this moment to select the constant temperature parameter needed, and send an instruction to control device 2, controls
Device 2 processed controls heating device 3 again or refrigerating plant 4 is heated or freezed as needed, to change case body temperature, works as sense
Temperature probe 14 detection case body temperatures be constant temperature when, liquid crystal display 13 prompt can verify, starting-up later time resistance meter into
Row test, after being completed, on circuit resistance tester test group and liquid crystal display 13 on 100A measuring resistance 5 into
Row compares, if error is met the requirements of the standard, that is, proves that the circuit resistance tester measuring accuracy meets standard requirements.
Embodiment 2
As shown in Figure 1, Figure 2, Figure 3 shows, for the windings tester such as transformer, reactor and mutual inductor, i.e. instrument for measuring DC resistance
When verification: D.C. resistance test used at present needs that different D.C. resistances is selected to export shelves according to tested device winding resistance
Commonly generally there are the different electric current gears such as 5A, 10A, 20A and 40A, choosing of different sizes for coil-block of transformer value in position
The electric current gear selected is also different, i.e. Direct Current Resistance in Power Transformer Coil value is generally within the scope of 0 to 1 ohm, electric current choosing
It selects then in 10A to 40A range；For distribution transformer winding D.C. resistance value at 1 ohm or more, electric current selects 5A gear, transformer
Winding uses high current, so in order to meet the power transformer winding D. C. resistance of different capabilities test needs, present apparatus shelves
Position is provided with the different electric current gear adjustment such as 5A, 10A, 20A and 40A.
Instrument for measuring DC resistance output is connected on 5A-20A terminal stud 10, is connected to 5A-20A measuring resistance 6, is rotated
Standard electric resistance value required for device 8 of transferring the files is controlled by conversion gear device 7.12 are turned on the power switch, temperature-sensing probe 14
Temperature data is sent to control device 2 in the cabinet that will test, and liquid crystal display 13 reads temperature number from control device 2
According to and show, press control selections key 11 at this moment to select the constant temperature parameter needed, and send an instruction to control device 2,
Control device 2 controls heating device 3 again and refrigerating plant 4 is heated or freezed as needed, to change case body temperature, when
When 14 detection case body temperature of temperature-sensing probe is constant temperature, the prompt of liquid crystal display 13 can be verified, and start instrument for measuring DC resistance
It is tested, after being completed, is compared with the test group and 5A-20A measuring resistance 6 of instrument for measuring DC resistance, if accidentally
Difference is met the requirements of the standard, that is, proves that the instrument for measuring DC resistance measuring accuracy meets standard requirements.
Embodiment 3
Thermal-insulating body outer layer is incubator aluminum alloy casing 15, and middle layer is fluffy glue insulating layer 17, and internal layer is asbestos layer 18, in this way
Structural al alloy shell 15 can resist impact, fluffy glue insulating layer 17 can be kept the temperature, and asbestos layer 18 can effectively play fire-retardant work
With.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811303342.5A CN109444544A (en) | 2018-11-02 | 2018-11-02 | A kind of portable constant temperature D.C. resistance calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811303342.5A CN109444544A (en) | 2018-11-02 | 2018-11-02 | A kind of portable constant temperature D.C. resistance calibration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109444544A true CN109444544A (en) | 2019-03-08 |
Family
ID=65550750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811303342.5A Pending CN109444544A (en) | 2018-11-02 | 2018-11-02 | A kind of portable constant temperature D.C. resistance calibration equipment |
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| Country | Link |
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| CN (1) | CN109444544A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018350A (en) * | 2019-04-26 | 2019-07-16 | 中辰电缆股份有限公司 | A kind of conductor DC resistance quick, intelligent measuring system online |
| CN110850171A (en) * | 2019-11-29 | 2020-02-28 | 国网山东省电力公司青岛供电公司 | A method for evaluating the qualification of DC resistance of voltage regulating transformers |
| CN112285396A (en) * | 2020-10-29 | 2021-01-29 | 北京东方计量测试研究所 | Super-stable standard resistor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110018350A (en) * | 2019-04-26 | 2019-07-16 | 中辰电缆股份有限公司 | A kind of conductor DC resistance quick, intelligent measuring system online |
| CN110850171A (en) * | 2019-11-29 | 2020-02-28 | 国网山东省电力公司青岛供电公司 | A method for evaluating the qualification of DC resistance of voltage regulating transformers |
| CN110850171B (en) * | 2019-11-29 | 2021-09-17 | 国网山东省电力公司青岛供电公司 | Evaluation method for DC resistance qualification degree of voltage regulating transformer |
| CN112285396A (en) * | 2020-10-29 | 2021-01-29 | 北京东方计量测试研究所 | Super-stable standard resistor |
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Application publication date: 20190308 |