CN206696419U - A kind of EFT/B immunity experiment systems under the conditions of electric energy meter bringing onto load - Google Patents
A kind of EFT/B immunity experiment systems under the conditions of electric energy meter bringing onto load Download PDFInfo
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- CN206696419U CN206696419U CN201621260406.4U CN201621260406U CN206696419U CN 206696419 U CN206696419 U CN 206696419U CN 201621260406 U CN201621260406 U CN 201621260406U CN 206696419 U CN206696419 U CN 206696419U
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Abstract
The utility model discloses the EFT/B immunity experiment systems under the conditions of a kind of electric energy meter bringing onto load, including list, three-phase voltage-stabilizing power supply, Clusters generating means, adjustable analogue loading device, single-phase or three-phase subject electric energy meter (hereinafter referred to as by test product), error checking arrangement, photoelectricity sampling head, single-phase or three-phase with reference to electric energy meter (hereinafter referred to as with reference to product), in the system by test product with being identical product with reference to product.The list, the output end of three-phase voltage-stabilizing power supply are connected with Clusters generating means and tunable load unit, the output end of the Clusters generating means is connected with by test product, described to be connected by test product with the output end of adjustable analogue loading device, the photoimpact by test product is exported and is connected (non-contact) with the photoelectricity sampling head of error checking arrangement；The input with reference to product is connected with error checking arrangement, and the photoimpact output with reference to product is connected (non-contact) with the photoelectricity sampling head of error checking arrangement.Tthe utility model system experiment is safe and reliable, need not increase filter completely, cost is cheap, and method is simple, credible result.
Description
Technical field
It the utility model is related to the EFT/B immunity experiment systems under the conditions of a kind of electric energy meter bringing onto load.
Background technology
It is traditional EFT/B pilot systems shown in Fig. 1, it is in error school that usual electric energy meter band, which carries EFT/B immunity experiments,
Filter is added between experiment device and subject electric energy meter, it is ensured that is applied to the high-frequency impulse group of subject electric energy meter electric source end of incoming cables
Interference signal will not enter error checking arrangement, ensure that error measuring means work is unaffected, so as to Accurate Determining subject electricity
Can error knots modification of the table under high-frequency impulse group's disturbed condition.
The drawbacks of this test method is：Firstth, filter cost is high；If the secondth, filter effect of filter
Ideal effect is not reached, then when carrying out band load EFT experiments, the high-frequency impulse group being applied on subject electric energy meter input terminal does
Disturb signal and will sample line by Current Voltage connecting line and electric pulse and conduct and enter error checking arrangement, cause error checking to fill
Put work and be affected even not normal, now the working condition of school error experiment device is can not to judge whether normal, Jin Erwu
Method judges whether subject electric energy meter error is really qualified, leads to not ensure that result of the test is authentic and valid.
Utility model content
The defects of the purpose of the utility model is and existed for existing pilot system is provided under the conditions of a kind of electric energy meter bringing onto load
EFT/B immunity experiment systems.
The utility model to achieve the above object, adopts the following technical scheme that：Under the conditions of a kind of electric energy meter bringing onto load
EFT/B immunity experiment systems, including list, three-phase voltage-stabilizing power supply, Clusters generating means, adjustable fictitious load dress
Put, single-phase or three-phase subject electric energy meter, the first photoelectricity sampling head, error checking arrangement, the second photoelectricity sampling head and it is single-phase or
Three-phase is with reference to electric energy meter；Wherein, the list, the first output end of three-phase voltage-stabilizing power supply are occurred by the Clusters
Device is connected with the impulse train input of described single-phase or three-phase subject electric energy meter, its second output end and described single-phase or three-phase
The voltage input end connection of electric energy meter is tested, its 3rd output end passes through the adjustable analogue loading device and described single-phase or three
The mutually current input terminal connection of subject electric energy meter；The light pulse output end of described single-phase or three-phase subject electric energy meter passes through the first light
Electric sampling head is connected with error checking arrangement, the voltage output end and current output terminal of the error checking arrangement with it is described single-phase
Or three-phase passes through the second photoelectricity sampling head and institute with reference to electric energy meter, described single-phase or three-phase with reference to the light pulse output end of electric energy meter
State error checking arrangement connection.
The beneficial effects of the utility model：Tthe utility model system experiment is safe and reliable, and cost is cheap, as a result correctly, is
It is not high-accuracy sophisticated electronic electrical equipment to be tested electric energy meter and provide the source of voltage and current, but manually adjustable adjustable
The kind equipment of transformer, high-frequency impulse group interference will not be received, eliminate the filter of costliness；Also overcome traditional experiment side
Method causes filter effect to decline during experiment because filter failure or performance reduce, and high-frequency interferencing signal seals in error
Calibration equipment causes the incredible risk of result of the test.
Brief description of the drawings
Fig. 1 is traditional EFT/B immunity experiment system structure diagrams.
Fig. 2 is EFT/B immunity experiments system structure diagram of the present utility model.
Embodiment
Shown in Fig. 2, the EFT/B immunity experiment systems under the conditions of a kind of electric energy meter bringing onto load, including list, three-phase are disclosed
Voltage-stabilized power supply 1, Clusters generating means 2, adjustable analogue loading device 3, single-phase or three-phase subject electric energy meter, first
Photoelectricity sampling is first 4, error checking arrangement 5, the second photoelectricity sampling first 6 and single-phase or three-phase are with reference to electric energy meter；Wherein, it is described
Single, the first output end of three-phase voltage-stabilizing power supply 1 passes through the Clusters generating means 2 and described single-phase or three-phase quilt
Try the impulse train input connection of electric energy meter, its second output end and the voltage input end of described single-phase or three-phase subject electric energy meter
Connection, the electric current that its 3rd output end is tested electric energy meter by the adjustable analogue loading device 3 with described single-phase or three-phase are defeated
Enter end connection；The light pulse output end of described single-phase or three-phase subject electric energy meter passes through the first photoelectricity sampling first 4 and error checking
Device 5 connects, and the voltage output end and current output terminal of the error checking arrangement 5 are with described single-phase or three-phase with reference to electric energy
Table, described single-phase or three-phase are filled with reference to the light pulse output end of electric energy meter by the second photoelectricity sampling first 6 and the error checking
Put 5 connections.
The utility model breaches the constraint of conventional test methods in test, identical using same error checking arrangement
Condition of work, error samplings are carried out to two performance identical subjects respectively, one of them be by test product, directly with soon
Fast transient pulse train generating means connection, and given using completely isolated power supply and applied Current Voltage (Current Voltage by test product
Value gives the Current Voltage value applied with reference to product to be equal with error checking arrangement).Another subjects is with reference to product, passes through mistake
Poor calibration equipment applies Current Voltage.The electromagnetism that electrical fast transient (eft) generating means is occurred does sorrow signal and error checking
Device is effectively isolated.
Test procedure：
The first step, according to the rated operational voltage and rated operational current by test product, given with error checking arrangement with reference to product
Apply identical voltage and current, after error checking arrangement output is stable, photoelectricity sampling head is placed into the pulse with reference to product
Above indicator lamp, error sampling is carried out, now error checking arrangement display should be a qualified model with reference to the measurement error of product
Enclose interior value.
Second step, single, three-phase voltage-stabilizing power supply output voltage is adjusted according to by the rated operational voltage of test product, to quick wink
Become impulse train generating means and operating voltage is provided.The power switch of Clusters generating means is opened, is applied to by test product
Add standard compliant test voltage, photoelectricity sampling head is placed into by above test product pulse indicator lamp, carries out error sampling.
3rd step, adjustable analogue loading device is slowly adjusted, apply operating current, and error of observation verification dress to by test product
The measurement error of display is put, stops regulation after measurement error is close to 0 and stabilization.Record what now error checking arrangement was shown
Measurement error value E1.
4th step, according to testing standard GB/T 17626.4-2008《EMC test and e measurement technology electricity fast transient
Impulse train immunity experiment》Requirement give by test product overlapped high-frequency Clusters, observe and recording error calibration equipment
The measurement error E2 of display.
5th step, calculation error Bianization Liang ⊿ E, judges result of the test.
Using unlike conventional test methods：Single-phase or three-phase electric energy meter error checking arrangement is directly connected on reference to product
On, single-phase or three-phase electric energy meter error checking arrangement voltage, electric current are respectively connected to, and voltage x current regulation is arrived by test product band
Identical value when carrying EFT/B immunity experiments.Another way will be passed through by the test item pulse output end mouth of EFT/B immunity experiments
Photoelectricity sampling head is connected with single-phase or three-phase electric energy meter error checking arrangement, by photoelectricity sampling head to the electrical energy pulse by test product
Carry out non-contact sampling, you can the measurement error by test product is seen on single-phase or three-phase electric energy meter error checking arrangement, and is remembered
The lower value E of record, avoid interference influences test effect by conduction pattern into single-phase or three-phase electric energy meter error checking arrangement.
At this moment it is regarded as equal by test product and with reference to the load applied on two products of product, the test condition of application is also identical
, the measurement error of two tables is also essentially identical.During experiment, begin through EFT experimental rigs and apply to tested electric energy meter
EFT/B interference signal, changed by observe that single-phase or three-phase electric energy meter calibration equipment shows by test product measurement error, you can
Judge whether because EFT interference signals are influenceed changed measuring accuracy by test product electric energy meter, be exactly the knot that we need to obtain
Fruit.
Example：In the batch production of Senvid Inc.'s electric energy meter, EFT performance tests must be done per batch, are entered by such scheme
The immunity experiment of capable electric energy meter Clusters, meets GB/T 17626.4-2008《EMC test and measurement
Technology electrical fast transient (eft) immunity experiment》Requirement.
First, experimental condition is as follows：Test class 4
In power supply port, protective grounding (PE)：Crest voltage：4KV；
Repetition rate：5KHz.
In I/O (input/output) signal, data and control port：Crest voltage：2KV；
Repetition rate：5KHz.
2nd, according to the 8.2nd article of limit of error as caused by other influences amount in GB/T 17251.321.The hundred of this experiment
The limit that point error changes is：4.0
Recorded below for measured test of the present utility model
Ping Jun ⊿ E=0.433 three times
Find out that error knots modification of the subject Triphase control-rate intelligent electric energy meter under high-frequency impulse interference accords with by upper result of the test
Close and require.
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (1)
1. the EFT/B immunity experiment systems under the conditions of a kind of electric energy meter bringing onto load, it is characterised in that including list, three-phase voltage stabilizing
Power supply, Clusters generating means, adjustable analogue loading device, single-phase or three-phase subject electric energy meter, the first photoelectricity are adopted
Sample head, error checking arrangement, the second photoelectricity sampling head and single-phase or three-phase are with reference to electric energy meter；Wherein, the list, three-phase voltage stabilizing
First output end of power supply is tested the arteries and veins of electric energy meter by the Clusters generating means with described single-phase or three-phase
The connection of group's input is rushed, its second output end is connected with the voltage input end of described single-phase or three-phase subject electric energy meter, and it the 3rd
The current input terminal that output end is tested electric energy meter by the adjustable analogue loading device with described single-phase or three-phase is connected；It is described
The light pulse output end of single-phase or three-phase subject electric energy meter is connected by the first photoelectricity sampling head with error checking arrangement, the mistake
The voltage output end and current output terminal of poor calibration equipment are with described single-phase or three-phase with reference to electric energy meter, described single-phase or three coherents
It is connected according to the light pulse output end of electric energy meter by the second photoelectricity sampling head with the error checking arrangement.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2016210314090 | 2016-08-31 | ||
| CN201621031409 | 2016-08-31 |
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| Publication Number | Publication Date |
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| CN206696419U true CN206696419U (en) | 2017-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621260406.4U Expired - Fee Related CN206696419U (en) | 2016-08-31 | 2016-11-21 | A kind of EFT/B immunity experiment systems under the conditions of electric energy meter bringing onto load |
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| CN (1) | CN206696419U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154212A (en) * | 2016-08-31 | 2016-11-23 | 宜兴市森维电子有限公司 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
| CN108710100A (en) * | 2018-06-20 | 2018-10-26 | 宁波三星智能电气有限公司 | A kind of correction method of register electric energy meter |
-
2016
- 2016-11-21 CN CN201621260406.4U patent/CN206696419U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154212A (en) * | 2016-08-31 | 2016-11-23 | 宜兴市森维电子有限公司 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
| CN106154212B (en) * | 2016-08-31 | 2019-04-30 | 宜兴市森维电子有限公司 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
| CN108710100A (en) * | 2018-06-20 | 2018-10-26 | 宁波三星智能电气有限公司 | A kind of correction method of register electric energy meter |
| CN108710100B (en) * | 2018-06-20 | 2021-03-09 | 宁波三星智能电气有限公司 | Meter calibration method for electric energy meter of meter counter |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20201121 |
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| CF01 | Termination of patent right due to non-payment of annual fee |