CN108919171B - Ammeter internal fault check meter - Google Patents
Ammeter internal fault check meter Download PDFInfo
- Publication number
- CN108919171B CN108919171B CN201810716482.9A CN201810716482A CN108919171B CN 108919171 B CN108919171 B CN 108919171B CN 201810716482 A CN201810716482 A CN 201810716482A CN 108919171 B CN108919171 B CN 108919171B
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- calibrator
- ammeter
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- meter
- load
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- 238000012360 testing method Methods 0.000 claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000005611 electricity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
Abstract
The invention belongs to a household ammeter detection device, and particularly relates to an ammeter internal fault checking instrument; the power transmission line comprises a live wire and a zero wire, and the measured ammeter comprises a first ammeter wiring end, a second ammeter wiring end, a third ammeter wiring end, a fourth ammeter wiring end, a measured ammeter live wire measuring unit and a measured ammeter zero wire measuring unit; the user load normal switch comprises a first load normal switch and a second load normal switch, the user load test switch comprises a first load test switch and a second load test switch, and the calibrator comprises a first calibrator terminal, a second calibrator terminal, a third calibrator terminal, a fourth calibrator terminal, a fifth calibrator terminal, a first calibrator current metering unit, a second calibrator current metering unit, a current generator, a first relay and a second relay; simple structure, the error is little, detects conveniently, efficient.
Description
Technical field:
the invention belongs to a household ammeter detection device, and particularly relates to an ammeter internal fault checking instrument.
The background technology is as follows:
with the development of social economy, the problem of electricity stealing is more and more prominent, and the electricity stealing technology is more and more intelligent, so that electricity stealing behaviors are more concealed, and the power supply company is seriously lost in electric quantity.
The ammeter internal fault calibrator has the functions of simulating power load output, calibration data comparison, calibration data recording and the like. The meter internal fault calibrator simulates a single-phase electric energy meter calibration table, the metering precision is 0.5S level, the measured electric energy meter and a current channel of the calibrator are connected in series, the analog load or the user load is metered in the current channel by utilizing the basic principle that the current of a series circuit is unchanged, and the respective electric energy metering parameters of the on-site calibrator and the measured electric energy meter are read and compared to obtain an error value, so that whether the measured electric energy meter is metered accurately is judged.
The invention comprises the following steps:
according to the defects, the invention provides the ammeter internal fault checking instrument which is simple in structure, small in size of equipment constituent elements, convenient to carry and easy to access.
The meter internal fault calibrator comprises a power transmission line, a measured meter, a user load normal switch, a user load test switch, a calibrator power supply and a calibrator, wherein the power transmission line comprises a live wire and a zero wire, and the measured meter comprises a first meter wiring end, a second meter wiring end, a third meter wiring end, a fourth meter wiring end, a measured meter live wire metering unit and a measured meter zero wire metering unit; the user load normal switch comprises a first load normal switch and a second load normal switch, the user load test switch comprises a first load test switch and a second load test switch, and the calibrator comprises a first calibrator terminal, a second calibrator terminal, a third calibrator terminal, a fourth calibrator terminal, a fifth calibrator terminal, a sixth calibrator terminal, a first calibrator current metering unit, a second calibrator current metering unit, a current generator, a first relay and a second relay; one end of the live wire is connected with one end of a first ammeter wiring end and is simultaneously connected with one end of a first relay and one end of a second relay respectively, the other end of the first ammeter wiring end is connected with one end of a live wire metering unit of a measured meter, the other end of the live wire metering unit of the measured meter is connected with one end of a second ammeter wiring end, the wiring end of the second current wiring end is connected with one end of a first load normal switch and is simultaneously connected with one end of a second calibrator wiring end, the other end of the first load normal switch is simultaneously connected with one end of a first load test switch, the other end of the user load is simultaneously connected with one end of a second load normal switch, the other end of the first load test switch is connected with one end of a fifth calibrator, the other end of the second load normal switch is connected with one end of a sixth calibrator wiring end, the other end of the fourth wiring end of the fourth ammeter wiring end is simultaneously connected with one end of a zero line metering unit of the measured meter, the other end of the fourth ammeter wiring end of the fourth meter is simultaneously connected with one end of the third calibrator wiring end of the meter, and the third calibrator wiring end of the meter is simultaneously connected with the third calibrator wiring end of the meter of the third calibrator; the other end of the first relay is connected with one wiring end of the current generator, the other end of the second relay is connected with the other wiring end of one end of the current generator, one wiring end of the other end of the current generator is connected with one end of the first calibrator current metering unit and is simultaneously connected with the other end of the fifth calibrator wiring end, the other end of the first calibrator current metering unit is connected with the other end of the second calibrator wiring end, the other wiring end of the other end of the current generator is connected with one end of the calibrator power supply and is simultaneously connected with the other end of the third calibrator wiring end, and the other end of the calibrator power supply is connected with the other end of the second relay.
Preferably, the ammeter internal fault checking instrument is single-phase load checking.
Preferably, the measured ammeter and the calibrator are connected in series.
Preferably, the ammeter internal fault checking instrument has an RS485 communication function.
The invention has simple structure, the current channels of the electric meter to be tested and the calibrator are connected in series, the analog load or the user load is measured in the current channel by utilizing the basic principle that the current of the series circuit is unchanged, and the error value is obtained by reading and comparing the electric energy measurement parameters of the on-site calibrator and the electric meter to be tested, so that whether the electric meter to be tested is accurately measured or not is judged, the error is small, the detection is convenient, and the efficiency is high.
Description of the drawings:
FIG. 1 is a schematic diagram of an internal fault checker for an electricity meter.
In the figure, a live wire 1, a neutral wire 2, a first ammeter terminal 3, a second ammeter terminal 4, a third ammeter terminal 5, a fourth ammeter terminal 6, a measured meter live wire metering unit 7, a measured side meter neutral wire metering unit 8, a first load normal switch 9, a second load normal switch 10, a user load 11, a first load test switch 12, a second load test switch 13, a first calibrator terminal 14, a second calibrator terminal 15, a third calibrator terminal 16, a fourth calibrator terminal 17, a fifth calibrator terminal 18, a sixth calibrator terminal 19, a first calibrator current metering unit 20, a second calibrator current metering unit 21, a first relay 22, a second relay 23, a current generator 24, a calibrator power supply 25, a measured ammeter 26 and a calibrator 27.
The specific embodiment is as follows:
as shown in fig. 1, the ammeter internal fault calibrator is single-phase load calibration, and has an RS485 communication function. The meter internal fault calibrator comprises a power transmission line, a measured meter 26, a user load 11, a user load normal switch, a user load test switch, a calibrator power supply 25 and a calibrator 27, wherein the power transmission line comprises a live wire 1 and a zero wire 2, and the measured meter comprises a first meter terminal 3, a second meter terminal 4, a third meter terminal 5, a fourth meter terminal 6, a measured meter live wire metering unit 7 and a measured meter zero wire metering unit 8; the user load normal switch comprises a first load normal switch 9 and a second load normal switch 10, the user load test switch comprises a first load test switch 12 and a second load test switch 13, the calibrator comprises a first calibrator terminal 14, a second calibrator terminal 15, a third calibrator terminal 16, a fourth calibrator terminal 17, a fifth calibrator terminal 18, a first calibrator current metering unit 20, a second calibrator current metering unit 21, a current generator 24, a first relay 22 and a second relay 23, and a tested ammeter 26 and a calibrator 27 are connected in series.
One end of the live wire 1 is connected with one end of the first ammeter wiring end 3 and is simultaneously connected with one end of the first relay 22 and one end of the second relay 23 respectively, the other end of the first ammeter wiring end 3 is connected with one end of the measured ammeter live wire metering unit 7, the other end of the measured ammeter live wire metering unit 7 is connected with one end of the second ammeter wiring end 4, the wiring end of the second ammeter wiring end 4 is connected with one end of the first load normal switch 9 and is simultaneously connected with one end of the second meter wiring end 15, the other end of the first load normal switch 9 is connected with one end of the first load test switch 12 and is simultaneously connected with one end of the user load 11, the other end of the user load 11 is simultaneously connected with one end of the second load normal switch 10, the other end of the first load test switch 13 is connected with one end of the fifth meter wiring end 18, the other end of the second load test switch 18 is connected with one end of the sixth meter wiring end 19, the other end of the second load normal switch 10 is connected with one end of the fourth ammeter 6, the other end of the fourth ammeter 6 is simultaneously connected with one end of the measured ammeter wiring end 8, the other end of the fourth meter wiring end 17 is simultaneously connected with the fourth meter wiring end 17 and the second meter wiring end 5, the second meter wiring end 17 is simultaneously connected with the other end of the third meter wiring end 5 and the other end of the third meter wiring end 5 is simultaneously connected with the third meter wiring end 21 and the third meter wiring end 5.
The other end of the first relay 22 is connected with one of the terminals of one end of the current generator 24, the other end of the second relay 23 is connected with the other of the terminals of one end of the current generator 24, one of the terminals of the other end of the current generator 24 is connected with one end of the first calibrator current metering unit 20 while being connected with the other end of the fifth calibrator terminal 18, wherein the other end of the first calibrator current metering unit 20 is connected with the other end of the second calibrator terminal 15, the other of the terminals of the other end of the current generator 24 is connected with one end of the calibrator power supply 25 while being connected with the other end of the third calibrator terminal 16, and the other end of the calibrator power supply 25 is connected with the other end of the second relay 23.
Working principle: the ammeter internal fault checking instrument adopts two simulation methods, namely a simulation load test mode and a user load test mode.
When the load test mode is adopted, the first load normal switch 9, the second load normal switch 10, the first load test switch 12 and the second load test switch 13 are all disconnected, so that the user load is not introduced to cause test errors. The first ammeter terminal 3, the second ammeter terminal 4 and the third ammeter terminal 5 of the tested ammeter 26 are correspondingly connected with the first calibrator terminal 14, the second calibrator terminal 15 and the third calibrator terminal 16 of the calibrator 27 one by one, an external 220V power supply is introduced, after the calibrator 27 works normally, an instruction for starting the calibration of the simulated load is sent, the system is firstly put into the first relay 22 and then put into the second relay 23, at the moment, the current generator 24 generates a simulated load current, and the simulated load current forms a loop among the first relay 22, the current generator 24, the first calibrator terminal 14 and the fire wire metering unit 7 of the tested ammeter, so that the fire wire metering unit 7 of the tested ammeter can perform simulated metering, and the first calibrator terminal 14 of the calibrator 27 can also perform simulated metering. The calibrator 27 can obtain fire wire metering data and perform error comparison.
When the user load test mode is adopted, the first relay 22 and the second relay 23 cannot be put into operation, otherwise, a loop is not arranged at the user load, and the test is wrong. The first load normal switch 9 and the second load normal switch 10 cannot be closed either, or else the user load 11 is short-circuited, and cannot be tested normally. The first ammeter terminal 3, the second ammeter terminal 4, the third ammeter terminal 5 and the fourth ammeter terminal 6 of the measured ammeter 26 are correspondingly connected with the first calibrator terminal 14, the second calibrator terminal 15, the third calibrator terminal 16 and the fourth calibrator terminal 17 of the calibrator 27 one by one, an external 220V power supply is introduced, after the calibrator 27 works normally, an instruction for starting user load calibration is sent, the first load test switch 12 and the second load test switch 13 of the user load 11 are closed, and then the live wire current forms a loop among the measured meter live wire metering unit 7, the first calibrator current metering unit 20, the user load 11, the second calibrator current metering unit 21 and the measured meter zero wire metering unit 8, and at the moment, the zero wire 2 current is actually equal to the live wire 1 current, so that the measured meter live wire metering unit 7 and the measured meter zero wire metering unit 8 can meter the user load 11, and the first calibrator current metering unit 20 and the second calibrator current metering unit 21 of the calibrator 27 can meter the user load 11. The calibrator 27 can obtain the metering data of the live wire 1 and the zero wire 2 at the same time, and perform error comparison.
Claims (4)
1. Ammeter internal fault check appearance, its characterized in that: the ammeter internal fault calibrator comprises a power transmission line, a measured ammeter, a user load normal switch, a user load test switch, a calibrator power supply and a calibrator, wherein the power transmission line comprises a live wire and a zero wire, and the measured ammeter comprises a first ammeter wiring end, a second ammeter wiring end, a third ammeter wiring end, a fourth ammeter wiring end, a measured ammeter live wire metering unit and a measured ammeter zero wire metering unit; the user load normal switch comprises a first load normal switch and a second load normal switch, the user load test switch comprises a first load test switch and a second load test switch, and the calibrator comprises a first calibrator terminal, a second calibrator terminal, a third calibrator terminal, a fourth calibrator terminal, a fifth calibrator terminal, a sixth calibrator terminal, a first calibrator current metering unit, a second calibrator current metering unit, a current generator, a first relay and a second relay; one end of the live wire is connected with one end of a first ammeter wiring end and is simultaneously connected with one end of a first relay and one end of a second relay respectively, the other end of the first ammeter wiring end is connected with one end of a live wire metering unit of a measured meter, the other end of the live wire metering unit of the measured meter is connected with one end of a second ammeter wiring end, the other end of the second ammeter wiring end is connected with one end of a first load normal switch and is simultaneously connected with one end of a second calibrator wiring end, the other end of the first load normal switch is simultaneously connected with one end of a first load, the other end of the user load is simultaneously connected with one end of a second load normal switch, the other end of the first load test switch is connected with one end of a fifth calibrator wiring end, the other end of the second load test switch is connected with one end of a sixth calibrator wiring end, the other end of the fourth ammeter wiring end is simultaneously connected with one end of a zero line metering unit of the measured meter and is simultaneously connected with one end of a fourth calibrator wiring end of the fourth calibrator, wherein the other end of the fourth meter wiring end of the fourth meter is simultaneously connected with one end of the third calibrator wiring end of the measured meter and is simultaneously connected with the third calibrator wiring end of the third calibrator; the other end of the first relay is connected with one wiring end of one end of the current generator, the other end of the second relay is connected with the other wiring end of one end of the current generator, one wiring end of the other end of the current generator is connected with one end of the first calibrator current metering unit and is simultaneously connected with the other end of the fifth calibrator wiring end, the other end of the first calibrator current metering unit is connected with the other end of the second calibrator wiring end, the other wiring end of the other end of the current generator is connected with one end of the calibrator power supply and is simultaneously connected with the other end of the third calibrator wiring end, and the other end of the calibrator power supply is connected with one end of the second relay.
2. The meter internal fault verifier of claim 1, wherein: the ammeter internal fault calibrator is single-phase load calibration.
3. The meter internal fault verifier of claim 1, wherein: the electric meter to be tested and the calibrator are connected in series.
4. The meter internal fault verifier of claim 2, wherein: the ammeter internal fault checking instrument has an RS485 communication function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716482.9A CN108919171B (en) | 2018-06-29 | 2018-06-29 | Ammeter internal fault check meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810716482.9A CN108919171B (en) | 2018-06-29 | 2018-06-29 | Ammeter internal fault check meter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108919171A CN108919171A (en) | 2018-11-30 |
| CN108919171B true CN108919171B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810716482.9A Active CN108919171B (en) | 2018-06-29 | 2018-06-29 | Ammeter internal fault check meter |
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| Country | Link |
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| CN (1) | CN108919171B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110187267B (en) * | 2019-06-06 | 2021-08-13 | 杭州海兴电力科技股份有限公司 | Single-phase three-wire intelligent ammeter relay state detection circuit and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826673A1 (en) * | 1998-06-16 | 1999-12-30 | Enermet Gmbh | Electricity meter tester |
| CN201226024Y (en) * | 2008-09-22 | 2009-04-22 | 黑龙江省电力科学研究院 | Test device for simulating on-site electric energy metering |
| CN201673250U (en) * | 2010-04-30 | 2010-12-15 | 华立仪表集团股份有限公司 | Electricity energy meter accuracy tester under condition of pulse train interference |
| CN204142951U (en) * | 2014-10-17 | 2015-02-04 | 国家电网公司 | A kind of electric energy meter error calibration equipment |
| CN106443567A (en) * | 2016-12-02 | 2017-02-22 | 国网安徽省电力公司电力科学研究院 | Real-load test system for electric energy meters |
| CN208537707U (en) * | 2018-06-29 | 2019-02-22 | 国网宁夏电力有限公司固原供电公司 | Ammeter internal fault tester |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9995815B2 (en) * | 2014-12-30 | 2018-06-12 | Energybox Ltd. | Energy metering system and method for its calibration |
-
2018
- 2018-06-29 CN CN201810716482.9A patent/CN108919171B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19826673A1 (en) * | 1998-06-16 | 1999-12-30 | Enermet Gmbh | Electricity meter tester |
| CN201226024Y (en) * | 2008-09-22 | 2009-04-22 | 黑龙江省电力科学研究院 | Test device for simulating on-site electric energy metering |
| CN201673250U (en) * | 2010-04-30 | 2010-12-15 | 华立仪表集团股份有限公司 | Electricity energy meter accuracy tester under condition of pulse train interference |
| CN204142951U (en) * | 2014-10-17 | 2015-02-04 | 国家电网公司 | A kind of electric energy meter error calibration equipment |
| CN106443567A (en) * | 2016-12-02 | 2017-02-22 | 国网安徽省电力公司电力科学研究院 | Real-load test system for electric energy meters |
| CN208537707U (en) * | 2018-06-29 | 2019-02-22 | 国网宁夏电力有限公司固原供电公司 | Ammeter internal fault tester |
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| CN108919171A (en) | 2018-11-30 |
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