CN205263293U - Zero device is examined to current transformer examination autozero based on current comparison appearance - Google Patents
Zero device is examined to current transformer examination autozero based on current comparison appearance Download PDFInfo
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- CN205263293U CN205263293U CN201520986389.1U CN201520986389U CN205263293U CN 205263293 U CN205263293 U CN 205263293U CN 201520986389 U CN201520986389 U CN 201520986389U CN 205263293 U CN205263293 U CN 205263293U
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- 238000004891 communication Methods 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims description 50
- 238000001514 detection method Methods 0.000 claims description 23
- 238000012795 verification Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 10
- 230000005611 electricity Effects 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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Abstract
The utility model discloses a zero device is examined to current transformer examination autozero based on current comparison appearance, its voltage regulator and liter flow the ware and are connected, it is connected respectively with by examination current transformer and supplementary mutual -inductor to rise the secondary of stream ware, by junction current comparator between examination current transformer and the connection of supplementary mutual -inductor, supplementary mutual -inductor, current comparison appearance and quilt examination current transformer all connect the interface that the current transformer check gauge corresponds, supplementary mutual -inductor is connected with electron zero set case, current transformer is connected with the current capacity case by the examination, the examination data communication end of current transformer check gauge is connected with the communication end of computer, a load adjustment serial ports and the control end of electronics zero set case of current transformer check gauge are connected, the 2nd load adjustment serial ports and the control end of current capacity case of current transformer check gauge are connected, the voltage regulator control serial ports of current transformer check gauge is connected with the control end of voltage regulator. The utility model discloses a test high -accuracy current transformer's automatic examination.
Description
Technical field
The utility model relates to Electric Measurement Technology field, refers to particularly one based on current ratioThe detecting current transformer automatic zero set zero-detection device of instrument.
Background technology
In each provincial electric power experimental study institute, provincial Weights and Measures Bureau and some areas power supply administration,In order to examine and determine high-precision current standard transformer, two-stage current transformer and current comparatorBe widely used as standard mutual inductor. Because the workload of current standard ct calibrating is large, numberNumerous and diverse according to processing, to testing person require high, for adapting to modern needs and being convenient to computerInformation processing, intellectuality becomes the development trend in current standard mutual-inductor tester future and grindsStudy carefully focus.
Domestic the most authoritative legal calibration authority-national high-voltage metering station at present, adopts and adjustsZero case, zero indicator, comparison ceremony mutual-inductor tester and zero magnetic flux transformer (or current ratioCompared with instrument) high-precision current standard mutual inductor is carried out to calibrating and measuring. In above-mentioned calibrating and measuring mistakeCheng Zhong, manually adjusts pressure regulator, and to code, (JJG313-2010 " measures mutual with electric current up-flowSensor " vertification regulation) rated current point, then manually adjust each gear dish of zeroing case, adjustZero indicator pointer state is observed in whole auxiliary winding load simultaneously, makes it point to zero-bit, thenImprove the display precision of zero indicator, again manually adjust each gear dish of zeroing case, make nullingInstrument nulling, until meet required precision. All there is automation in above-mentioned whole verification processDegree is low, the problem that workload is large.
Utility model content
The purpose of this utility model is exactly that a kind of Current Mutual Inductance based on current comparator will be providedDevice calibrating automatic zero set zero-detection device, this device can be realized the automation of standard current transformerCalibrating, has improved calibration operation efficiency.
For realizing this object, a kind of electricity based on current comparator that the utility model is designedCurrent transformer calibrating automatic zero set zero-detection device, it comprises pressure regulator, current lifting device, auxiliary mutual inductanceDevice, current comparator, current transformer calibrator, current capacity case, electronics zeroing case and meterCalculation machine, wherein, described pressure regulator elementary for connecting AC power, the inferior cascade of pressure regulatorConnect the elementary of current lifting device, the secondary one end of current lifting device be used for connecting tested current transformer once aroundThe non-polar end of group, the other end that current lifting device is secondary and a winding of auxiliary mutual inductor nonpolarEnd connects, the non-utmost point of the polar end of a winding of auxiliary mutual inductor and a winding of current comparatorProperty end connect, winding of the polar end of a winding of current comparator and tested current transformerPolar end connect, polar end, the current comparator of described tested current transformer compensation windingThe polar end of Secondary Winding, the polar end summation current transformer verification of current comparator compensation windingThe poor stream tributary signal of instrument flows into the polarity that terminal K all connects tested secondary winding in current transformerEnd; Non-polar end and the tested current transformer of current comparator compensation winding compensate the non-of windingPolar end all connects the ground terminal D of current transformer calibrator, current transformer calibratorGround terminal D ground connection, the non-polar end of current comparator Secondary Winding and auxiliary mutual inductor secondaryThe polar end of winding connects, the non-polar end of auxiliary mutual inductor Secondary Winding and current transformer schoolTest the secondary standard binding post T of instrumentOConnect the two ends and electricity of auxiliary mutual inductor zeroing windingThe zeroing binding post docking at son zeroing case two ends, the non-utmost point of tested secondary winding in current transformerThe tested binding post T of secondary of property end and current transformer calibratorXBetween series current loadCase, zero winding of current comparator is connected with current transformer calibrator zero-detection terminals J;
The tester calibrating data communication end of current transformer calibrator and the communication ends of computer connectConnect the control of the first load adjustment control serial ports of current transformer calibrator and electronics zeroing caseEnd connects, the second load adjustment control serial ports of current transformer calibrator and current capacity caseControl end connects, the pressure regulator control serial ports of current transformer calibrator and the control end of pressure regulatorConnect.
The beneficial effects of the utility model:
The above-mentioned standard current transformer based on current comparator that the utility model provides is automaticCalibrating installation, has solved automation journey in the high-accuracy detecting current transformer process of current verificationSpend that low, workload is large, operating efficiency is extremely low, data processing is numerous and diverse, wanting testing personAsk the problems such as height, realized the automatic Verification of testing high-accuracy current transformer, improved workEfficiency.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model;
Wherein, 1-pressure regulator, 2-current lifting device, 3-auxiliary mutual inductor, 4-current comparator,5-current transformer calibrator, 6-current capacity case, 7-electronics zeroing case, 8-computer,9-tested current transformer.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is done further to say in detailBright:
A kind of detecting current transformer based on current comparator that the utility model provides is automaticZeroing zero-detection device, as described in Figure 1, it comprises pressure regulator 1, current lifting device 2, auxiliary mutual inductanceDevice 3, current comparator 4, current transformer calibrator 5, current capacity case 6, electronics zeroingCase 7 and computer 8, wherein, elementary (terminal A and the terminal X) of described pressure regulator 1 usesIn connecting AC power, (terminal a and terminal x) are connected current lifting device 2 for pressure regulator 1 secondaryElementary, one end of 2 levels of current lifting device is for connecting tested current transformer 9 windingsNon-polar end, the other end of 2 levels of current lifting device and 3 windings of auxiliary mutual inductor nonpolarEnd connects, the polar end of 3 windings of auxiliary mutual inductor and 4 windings of current comparatorNon-polar end connects, the polar end of 4 windings of current comparator and tested current transformer 9The polar end of a winding connects, and described tested current transformer 9 compensates the polarity of winding NBEnd, the polar end of current comparator 4 Secondary Winding N21, current comparator 4 compensate windingThe poor stream tributary signal of polar end summation current transformer tester 5 of NB1 flows into terminal K and all connectsConnect the polar end of tested current transformer 9 Secondary Winding N2; Current comparator 4 compensates windingThe non-polar end of NB1 is all connected with the non-polar end that tested current transformer 9 compensates winding NBThe ground terminal D of current transformer calibrator 5, the ground terminal of current transformer calibrator 5D ground connection, the non-polar end of current comparator 4 Secondary Winding N21 and auxiliary mutual inductor 3 two timesThe polar end of winding N1 connects, the non-polar end of auxiliary mutual inductor 3 Secondary Winding N1 and electricityThe secondary standard binding post T of current transformer tester 50Connect, auxiliary mutual inductor 3 returns to zeroDock with the zeroing binding post at electronics zeroing case 7 two ends at the two ends of winding N0, tested electric currentThe non-polar end of transformer 9 Secondary Winding N2 and the secondary of current transformer calibrator 5 are testedBinding post TXBetween series current Burden box 6, zero winding NU of current comparator 4 with electricityCurrent transformer tester 5 zero-detection terminals J connect;
The tester calibrating data communication end of current transformer calibrator 5 and communicating by letter of computer 8End connects (obtaining tester calibrating data), the first load adjustment of current transformer calibrator 5Controlling serial ports is connected and (adjusts auxiliary mutual inductor 3 Secondary Winding with the control end of electronics zeroing case 7N0 institute on-load), the second load adjustment control serial ports and electric current of current transformer calibrator 5The control end of Burden box 6 connects (adjusting 9 on-loads of tested current transformer), Current Mutual InductanceThe pressure regulator control serial ports of device tester 5 is connected and (adjusts by control with the control end of pressure regulator 1Depressor 1 boosts and reaches the object of control loop electric current).
In technique scheme, zero winding NU of described current comparator 4 is by shielding line 105 zero-detection terminals J are connected with current transformer calibrator.
In technique scheme, the tester calibrating data of described current transformer calibrator 5 are logicalLetter end is connected with the communication ends of computer 8 by communication serial port.
In technique scheme, described pressure regulator 1 elementary for connecting the alternating current of 220VSource.
In technique scheme, the secondary voltage of described pressure regulator 1 is 250V.
In technique scheme, described electronics zeroing case 7 is electronic type balancing controls, does not needManual operation, directly realizes auxiliary mutual inductor 3 Secondary Winding N1 by computer 8 controls and is withThe setting of load.
In technique scheme, described current transformer calibrator 5 comprises conventional current transformerTester module, zero-detection module and zero-bit indicating module, described zero-detection module input is verificationThe zero-detection terminals J of instrument; Zero-detection module output is connected with zero-bit indicating module input, entersRow zero-bit shows; Zero-detection module output is connected with conventional current mutual-inductor tester module, whenWhen zero-detection module detects zero signal, notice conventional current mutual-inductor tester module is missedDifference measurements.
A kind ofly utilize the above-mentioned detecting current transformer automatic zero set inspection based on current comparatorZero installs, and carries out the method for standard current transformer automatic calibration, and it comprises the steps:
Step 1: control computer 8 and send and measure instruction, electricity to current transformer calibrator 5Current transformer tester 5 receives to measure and controls pressure regulator 1 after instruction and boost;
Step 2: in the current transformer rated current percentage tabular value of current transformer calibrator 5While reaching a default certified value, control electronics zeroing case 7 by current transformer calibrator 5To auxiliary mutual inductor 3 operation of returning to zero, meanwhile, the zero-detection in current transformer calibrator 5Module detects zero-bit corresponding to current comparator 4 zero windings in real time, and shows in real time;
Step 3: when the zero-detection module in current transformer calibrator 5 detects current comparatorWhen 4 zero-bit windings are zero-bit, carry out tested current transformer by current transformer calibrator 59 error measures, and this error measurement is uploaded to computer 8;
Step 4: carry out current transformer calibrator 5 according to the mode of above-mentioned steps 2 and step 3The tested electric current of current transformer rated current percentage tabular value while reaching all the other default certified valuesTransformer 9 error measures;
Step 5: complete tested current transformer 9 error measures that all default certified values are correspondingAfter, computer 8 is controlled pressure regulator 1 and is returned zero-bit, completes experiment.
In technique scheme, described default certified value comprise code certified value 1%, 5%,20%, 100% and 120%. Above-mentioned code is JJG313-2010 " Verification of Measuring Current Transformer "Vertification regulation.
In the step 3 of technique scheme, current transformer calibrator 5 is by error measurementBeing uploaded to computer 8 shows and stores.
It is known that the content that this description is not described in detail belongs to professional and technical personnel in the fieldPrior art.
Claims (5)
1. the detecting current transformer automatic zero set zero-detection device based on current comparator,It is characterized in that: it comprises pressure regulator (1), current lifting device (2), auxiliary mutual inductor (3), electricityStream comparator (4), current transformer calibrator (5), current capacity case (6), electronics zeroingCase (7) and computer (8), wherein, described pressure regulator (1) elementary for connecting interchangePower supply, the secondary connection current lifting device (2) of pressure regulator (1) elementary, current lifting device (2) is secondaryOne end be used for connecting the non-polar end of (9) windings of tested current transformer, current lifting device(2) non-polar end of (3) windings of the secondary other end and auxiliary mutual inductor is connected, auxiliaryHelp the polar end of (3) windings of transformer and the non-utmost point of (4) windings of current comparatorProperty end connect, the polar end of (4) windings of current comparator and tested current transformer (9)The polar end of a winding connects, the polarity of described tested current transformer (9) compensation windingThe polar end of end, current comparator (4) Secondary Winding, current comparator (4) compensation windingThe poor stream of polar end summation current transformer tester (5) tributary signal flow into terminal K and all connectThe polar end of tested current transformer (9) Secondary Winding; Current comparator (4) compensation windingThe non-polar end of non-polar end and tested current transformer (9) compensation winding be all connected electric currentThe ground terminal D of mutual-inductor tester (5), the earth terminal of current transformer calibrator (5)Sub-D ground connection, the non-polar end of current comparator (4) Secondary Winding and auxiliary mutual inductor (3)The polar end of Secondary Winding connects, the non-polar end of auxiliary mutual inductor (3) Secondary Winding and electricityThe secondary standard binding post T of current transformer tester (5)OConnect auxiliary mutual inductor (3)Dock with the zeroing binding post at electronics zeroing case (7) two ends at the two ends of zeroing winding, testedTwo of the non-polar end of current transformer (9) Secondary Winding and current transformer calibrator (5)Inferior tested binding post TXBetween series current Burden box (6), zero of current comparator (4)Winding is connected with current transformer calibrator (5) zero-detection terminals J;
Tester calibrating data communication end and the computer (8) of current transformer calibrator (5)Communication ends connect, the first load adjustment control serial ports of current transformer calibrator (5) with electricityThe control end of son zeroing case (7) connects, and the second load of current transformer calibrator (5) is adjustedWhole control serial ports is connected with the control end of current capacity case (6), current transformer calibrator (5)Pressure regulator control serial ports be connected with the control end of pressure regulator (1).
2. the detecting current transformer based on current comparator according to claim 1 certainlyMoving zeroing zero-detection device, is characterized in that: zero winding of described current comparator (4) passes throughShielding line (10) is connected with current transformer calibrator (5) zero-detection terminals J.
3. the detecting current transformer based on current comparator according to claim 1 certainlyMoving zeroing zero-detection device, is characterized in that: the verification of described current transformer calibrator (5)Instrument calibrating data communication end is connected with the communication ends of computer (8) by communication serial port.
4. the detecting current transformer based on current comparator according to claim 1 certainlyMoving zeroing zero-detection device, is characterized in that: described pressure regulator (1) elementary for connecting 220VAC power.
5. the detecting current transformer based on current comparator according to claim 1 certainlyMoving zeroing zero-detection device, is characterized in that: the secondary voltage of described pressure regulator (1) is 250V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520986389.1U CN205263293U (en) | 2015-12-01 | 2015-12-01 | Zero device is examined to current transformer examination autozero based on current comparison appearance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520986389.1U CN205263293U (en) | 2015-12-01 | 2015-12-01 | Zero device is examined to current transformer examination autozero based on current comparison appearance |
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| CN205263293U true CN205263293U (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520986389.1U Expired - Fee Related CN205263293U (en) | 2015-12-01 | 2015-12-01 | Zero device is examined to current transformer examination autozero based on current comparison appearance |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372613A (en) * | 2015-12-01 | 2016-03-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method of automatic zero setting and zero detection for verification of current transformer on the basis of current comparator |
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
| CN114062753A (en) * | 2021-12-02 | 2022-02-18 | 山西互感器电测设备有限公司 | Full-automatic voltage source simulation load zeroing box and testing method thereof |
| CN114200379A (en) * | 2021-12-02 | 2022-03-18 | 山西互感器电测设备有限公司 | Self-balancing comparator type mutual inductor calibrator and testing method thereof |
-
2015
- 2015-12-01 CN CN201520986389.1U patent/CN205263293U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372613A (en) * | 2015-12-01 | 2016-03-02 | 国网电力科学研究院武汉南瑞有限责任公司 | Device and method of automatic zero setting and zero detection for verification of current transformer on the basis of current comparator |
| CN110888099A (en) * | 2019-12-09 | 2020-03-17 | 国网山东省电力公司电力科学研究院 | Test control system and method |
| CN114062753A (en) * | 2021-12-02 | 2022-02-18 | 山西互感器电测设备有限公司 | Full-automatic voltage source simulation load zeroing box and testing method thereof |
| CN114200379A (en) * | 2021-12-02 | 2022-03-18 | 山西互感器电测设备有限公司 | Self-balancing comparator type mutual inductor calibrator and testing method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20201201 |
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| CF01 | Termination of patent right due to non-payment of annual fee |