CN209513910U - 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
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- CN209513910U CN209513910U CN201821803385.5U CN201821803385U CN209513910U CN 209513910 U CN209513910 U CN 209513910U CN 201821803385 U CN201821803385 U CN 201821803385U CN 209513910 U CN209513910 U CN 209513910U
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- calibration equipment
- constant temperature
- resistance calibration
- portable constant
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- 239000000523 sample Substances 0.000 claims abstract description 8
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- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims description 3
- 238000002474 experimental method 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
- 239000003063 flame retardant Substances 0.000 claims description 2
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- 238000012360 testing method Methods 0.000 abstract description 25
- 238000012795 verification Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004804 winding Methods 0.000 description 6
- 230000036760 body temperature Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 239000010425 asbestos Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003292 glue 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
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
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- 230000001105 regulatory effect Effects 0.000 description 1
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Abstract
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 resistance calibration equipment, by control device with temperature-sensing probe and the heating device of cabinet wall is arranged in and refrigerating plant connect and forms respectively in thermostatically-controlled equipment, and resistance calibration equipment includes loop resistance test device and D.C. resistance test device.The utility model has the beneficial effects that it is easy to carry, pass through the temperature and humidity in control set for adjusting, it is ensured that measuring resistance resistance value under temperature constant state is constant, and verification error is small, it is ensured that checking precision improves test efficiency.
Description
Technical field
The utility model relates to a kind of portable constant temperature D.C. resistance calibration equipments, and it is high to be suitable for electric system electrical equipment
Press testing inspection precision 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 with
Resistance calibration equipment, thermostatically-controlled equipment by control device respectively with temperature-sensing probe and be arranged in the heating device of cabinet wall with
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.
Gear shift device is provided on cabinet panel to connect by the intracorporal conversion stopping device of case with resistance calibration equipment.
It converts stopping 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.
Gear shift device 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, the utility model has the beneficial effects that it is easy to carry, by warm and humid in control set for adjusting
Degree, it is ensured that measuring resistance resistance value under temperature constant state is constant, and 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 mark
Quasi- resistance, 7, conversion stopping device, 8, gear shift device, 9,100kV terminal stud, 10,5A-20A terminal stud, 11, control choosing
Select 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: by circuit electricity
Resistance tester output is connected on 100A terminal stud 9, is connected to 100A measuring resistance 5, and electric power switch 12, temperature-sensing probe are opened
Temperature data is sent to control device 2 in 14 cabinets that will test, and liquid crystal display 13 reads temperature from control device 2
Data are simultaneously shown, 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 or refrigerating plant 4 is heated or freezed as needed, to change case body temperature,
When 14 detection case body temperature of temperature-sensing probe is constant temperature, the prompt of liquid crystal display 13 can be verified, starting-up later time resistance test
Instrument is tested, after being completed, with the test group on circuit resistance tester and the 100A standard electric on liquid crystal display 13
Resistance 5 is compared, 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. D.C. resistance is surveyed
When examination instrument verification: D.C. resistance test used at present needs that different D.C. resistances is selected to export according to tested device winding resistance
Gear commonly generally has the different electric current gears such as 5A, 10A, 20A and 40A, of different sizes for coil-block of transformer value,
The electric current gear of selection 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
Selection is then in 10A to 40A range；For distribution transformer winding D.C. resistance value at 1 ohm or more, electric current selects 5A gear, transformation
Device winding uses high current, so in order to meet the power transformer winding D. C. resistance of different capabilities test needs, the present apparatus
Gear 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 gear shift device 8 is controlled by conversion stopping 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,
Such structural al alloy shell 15 can resist impact, and fluffy glue insulating layer 17 can be kept the temperature, and asbestos layer 18 can effectively play resistance
Combustion effect.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
Claims (8)
1. 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, it is characterised in that thermostatically-controlled equipment is by control device (2) respectively with temperature-sensing probe (14) and setting in cabinet
The heating device (3) and refrigerating plant (4) of inner wall connect composition, and resistance calibration equipment includes loop resistance calibration device and straight
Leakage resistance calibration equipment.
2. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that loop resistance school
Experiment device is connect by the intracorporal 100A measuring resistance (5) of case is arranged in the 100kV terminal stud (9) being arranged on cabinet panel
Composition.
3. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that D.C. resistance school
Experiment device is by the 5A-20A terminal stud (10) that the intracorporal 5A-20A measuring resistance (6) of case is arranged in Yu is arranged on cabinet panel
Connection composition.
4. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that on cabinet panel
Gear shift device (8) are provided with to connect by the intracorporal conversion stopping device (7) of case with resistance calibration equipment.
5. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that conversion gear dress
(7) are set using rotary switch structure.
6. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that cabinet outer layer is
Protective layer made of hard material, middle layer are insulating layer, and internal layer is flame-retardant layer.
7. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that on cabinet panel
It is provided with control selections key (11) and liquid crystal display (13), is connected with the control device (2) being arranged in inside thermal-insulating body.
8. a kind of portable constant temperature D.C. resistance calibration equipment according to claim 1, it is characterised in that box house is set
Power supply device (1) is equipped with to connect with control device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821803385.5U CN209513910U (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 |
|---|---|---|---|
| CN201821803385.5U CN209513910U (en) | 2018-11-02 | 2018-11-02 | A kind of portable constant temperature D.C. resistance calibration equipment |
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| Publication Number | Publication Date |
|---|---|
| CN209513910U true CN209513910U (en) | 2019-10-18 |
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| CN201821803385.5U Active CN209513910U (en) | 2018-11-02 | 2018-11-02 | A kind of portable constant temperature D.C. resistance calibration equipment |
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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
- 2018-11-02 CN CN201821803385.5U patent/CN209513910U/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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