CN106154212A - A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load - Google Patents
A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load Download PDFInfo
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- CN106154212A CN106154212A CN201610798464.0A CN201610798464A CN106154212A CN 106154212 A CN106154212 A CN 106154212A CN 201610798464 A CN201610798464 A CN 201610798464A CN 106154212 A CN106154212 A CN 106154212A
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- electric energy
- energy meter
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- error checking
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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 discloses the electrical fast transient (eft) immunity experiment system 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, the tested electric energy meter of single-phase or three-phase (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 native system by test product be identical product with reference to product.Described outfan single, three-phase voltage-stabilizing power supply is connected with Clusters generating means and tunable load unit, the outfan of described Clusters generating means is connected with by test product, the described outfan by test product with adjustable analogue loading device is connected, and the described photoimpact by test product exports and is connected (noncontact) with the photoelectricity sampling head of error checking arrangement；The described input with reference to product is connected with error checking arrangement, and the described photoimpact output with reference to product is connected (noncontact) with the photoelectricity sampling head of error checking arrangement.Present system experimental safe is reliable, completely without increasing filter, with low cost, and method is simple, credible result.
Description
Technical field
The present invention relates to the EFT/B immunity experiment system under the conditions of a kind of electric energy meter bringing onto load.
Background technology
Shown in Fig. 1, for traditional EFT/B pilot system, it is in error school that usual electric energy watchband carries EFT/B immunity experiment
Filter is added, it is ensured that be applied to the high-frequency impulse group of tested electric energy meter electric source end of incoming cables between experiment device and tested electric energy meter
Interference signal will not enter error checking arrangement, it is ensured that error measuring means work is unaffected, thus the tested electricity of Accurate Determining
Can table error knots modification under high-frequency impulse group's disturbed condition.
The drawback of this test method is: the first, filter cost is high；If the filter effect of the second filter
Do not reach ideal effect, then, when carrying out band and carrying EFT test, be applied to the high-frequency impulse group on tested electric energy meter input terminal and do
Disturb signal and will enter error checking arrangement by current/voltage connecting line and electric pulse sampling line conduction, cause error checking to fill
Putting work and be affected the most not normal, now the duty of school error experiment device is to judge whether normally, Jin Erwu
Method judges that tested electric energy meter error is the most qualified, causes guaranteeing that result of the test is authentic and valid.
Summary of the invention
Under the conditions of the present invention seeks to provide a kind of electric energy meter bringing onto load for the defect that existing pilot system exists
EFT/B immunity experiment system.
The present invention for achieving the above object, adopts the following technical scheme that the EFT/B under the conditions of a kind of electric energy meter bringing onto load resists
Degree of disturbing pilot system, including list, three-phase voltage-stabilizing power supply, Clusters generating means, adjustable analogue loading device, single-phase
Or the tested electric energy meter of three-phase, the first photoelectricity sampling head, error checking arrangement, the second photoelectricity sampling head and single-phase or three-phase reference
Electric energy meter；Wherein, described first outfan single, three-phase voltage-stabilizing power supply passes through described Clusters generating means and institute
State single-phase or the tested electric energy meter of three-phase impulse train input to connect, its second outfan and the described single-phase or tested electric energy of three-phase
The voltage input end of table connects, and its 3rd outfan is by described adjustable analogue loading device and the described single-phase or tested electricity of three-phase
The current input terminal of energy table connects；Described single-phase or the tested electric energy meter of three-phase light pulse outfan passes through the first photoelectricity sampling head
It is connected with error checking arrangement, the voltage output end of described error checking arrangement and current output terminal and described single-phase or three coherents
According to electric energy meter, described single-phase or three-phase reference electric energy meter light pulse outfan passes through the second photoelectricity sampling head and described error school
Experiment device connects.
Beneficial effects of the present invention: present system experimental safe is reliable, with low cost, result is correct, for tested electric energy
Table provides the most high-accuracy sophisticated electronic electrical equipment in source of voltage and current, but manually adjustable adjustable transformer it
Kind equipment, will not receive high-frequency impulse group interference, eliminate the filter of costliness；Also overcome conventional test methods in test
During cause filter effect to decline because filter fault or performance reduce, high-frequency interferencing signal seals in error checking arrangement
Cause the incredible risk of result of the test.
Accompanying drawing explanation
Fig. 1 is traditional EFT/B immunity experiment system structure schematic diagram.
Fig. 2 is the EFT/B immunity experiment system structure schematic diagram of the present invention.
Fig. 3 is the first, second photoelectricity sampling header structure schematic diagram of the present invention.
Detailed description of the invention
Shown in Fig. 2, disclose the EFT/B immunity experiment system under the conditions of a kind of electric energy meter bringing onto load, including list, three-phase
Regulated power supply 1, Clusters generating means 2, adjustable analogue loading device 3, the single-phase or tested electric energy meter of three-phase, first
Photoelectricity sampling head 4, error checking arrangement the 5, second photoelectricity sampling head 6 and single-phase or three-phase reference electric energy meter；Wherein, described
First outfan single, three-phase voltage-stabilizing power supply 1 passes through described Clusters generating means 2 and described single-phase or three-phase quilt
The impulse train input of examination electric energy meter connects, its second outfan and the described single-phase or voltage input end of the tested electric energy meter of three-phase
Connecting, its 3rd outfan is defeated with described single-phase or the tested electric energy meter of three-phase electric current by described adjustable analogue loading device 3
Enter end to connect；Described single-phase or the tested electric energy meter of three-phase light pulse outfan passes through the first photoelectricity sampling head 4 and error checking
Device 5 connects, the voltage output end of described error checking arrangement 5 and current output terminal and described single-phase or three-phase reference electric energy
Table, described single-phase or three-phase reference electric energy meter light pulse outfan is filled with described error checking by the second photoelectricity sampling head 6
Put 5 connections.
Wherein, described first photoelectricity sampling head 4 and the second photoelectricity sampling head 5 include that receiving transducer 41, sucker 42, signal turn
Parallel operation 43, plug 44 and copper core bent stick 45, copper core bent stick 45 is a twin-core cable, wherein being relatively large in diameter an of copper core,
For 1.3mm, copper core bent stick 45 is made can arbitrarily to bend and can shape measurement.The top of sucker 42 is fixed with a magnetic core 49.Connect
Receive probe 41 to be connected with one end of copper core bent stick 45, after the other end of copper core bent stick 45 passes the hole opened in sucker 42 top
Being connected with the wire 47 being installed with joint protective bolt 46, joint protective bolt 46 is for protecting the company between copper core bent stick 45 and wire 47
Connect.The other end of wire 47 is connected with the signal end of signal adapter 43, and the power supply signal end of signal adapter 43 is believed with power supply
Number line 48 is connected, and the other end of power signal line 48 connects plug 44, and during measurement, plug 44 inserts the socket of calibration console for electric energy meter
On.Wherein, the knob 50 of signal adapter 43 side plays fine setting effect.Have employed the photoelectricity sampling head of above-mentioned technical pattern, make
Used time, without installing, directly by sucker suction on the surface of electric energy meter, owing to copper core bent stick can arbitrarily bend, therefore passes through
Receiving transducer can be directed at the optional position on electric energy meter surface by curved dynamic copper core bent stick, and it thus can be made to gather on optional position
Electric energy meter pulse display lamp signal, thus solve the signals collecting work of some position that existing photoelectric sampler cannot complete
Make.
The present invention, when test, breaches the constraint of conventional test methods, uses same error checking arrangement, identical work
Making condition, respectively the subjects that two performances are identical is carried out error sampling, one of them is by test product, directly with quick wink
Become impulse train generating means connect, and use completely isolated power supply give by test product apply current/voltage (this current/voltage value with
The current/voltage value equivalent applied with reference to product given by error checking arrangement).Another one subjects is with reference to product, by error school
Experiment device applies current/voltage.The electromagnetism that electrical fast transient (eft) generating means is occurred does melancholy signal and error checking arrangement
Effectively isolate.
Test procedure:
The first step, according to by the rated operational voltage of test product and rated operational current, gives with reference to product with error checking arrangement
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 display lamp, carrying out error sampling, now error checking arrangement display should be a qualified model with reference to the measurement error of product
Enclose interior value.
Second step, regulates single, the output voltage of three-phase voltage-stabilizing power supply, to quick wink according to the rated operational voltage by test product
Become impulse train generating means and running voltage is provided.Open the on and off switch of Clusters generating means, executed by test product
Add standard compliant test voltage, photoelectricity sampling head is placed into by above test product pulse display lamp, carries out error sampling.
3rd step, slowly regulates adjustable analogue loading device, gives and is applied operating current, and observational error verification dress by test product
Put the measurement error of display, when measurement error close to 0 and stable after stop regulation.Record what now error checking arrangement showed
Measurement error value E1.
4th step, according to test standard GB/T 17626.4-2008 " EMC test and measurement technology electricity fast transient
Impulse train immunity experiment " requirement give by test product overlapped high-frequency Clusters, observe and recording error calibration equipment
Measurement error E2 of display.
5th step, calculates error change amount E, it is judged that result of the test.
Use unlike conventional test methods: be directly connected on single-phase or three-phase electric energy meter error checking arrangement with reference to product
On, it is respectively connected to single-phase or the voltage of three-phase electric energy meter error checking arrangement, electric current, and voltage x current is adjusted to by test product band
Carry value identical during EFT/B immunity experiment.Another road is by by the test specimen pulse output end mouth warp of EFT/B immunity experiment
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, the measurement error by test product can be seen on single-phase or three-phase electric energy meter error checking arrangement, and remember
Record this value E lower, it is to avoid interference enters single-phase or three-phase electric energy meter error checking arrangement by conduction pattern affects test effect.
At this moment by test product and being regarded as equal with reference to the load applied on two products of product, the test condition of applying is also identical
, the measurement error of two tables is also essentially identical.During test, begin through EFT assay device and apply to tested electric energy meter
The interference signal of EFT/B, what or three-phase electric energy meter calibration equipment single-phase by observation showed is changed by test product measurement error,
Judge by whether test product electric energy meter is changed measuring accuracy because EFT interference signal is affected, it is simply that we need the knot obtained
Really.
Example: in the batch production of Senvid Inc.'s electric energy meter, every batch must do EFT performance test, enters by such scheme
The immunity experiment of the electric energy meter Clusters of row, meets GB/T 17626.4-2008 " EMC test and measurement
Technology electrical fast transient (eft) immunity experiment " requirement.
One, experimental condition is as follows: test class 4
In power supply port, protective grounding (PE): crest voltage: 4KV；
Repetition rate: 5KHz.
At I/O (input/output) signal, data and control port: crest voltage: 2KV；
Repetition rate: 5KHz.
Two, according to the in GB/T 17251.321 the 8.2nd article of limit of error caused by other influences amount.This
The limit that the percent error of test changes is: 4.0
It it is below the measured test record of the present invention
Three average E=0.433
Tested Triphase control-rate intelligent electric energy meter error knots modification symbol under high-frequency impulse disturbs is found out by upper result of the test
Close requirement.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and
Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (1)
1. the EFT/B immunity experiment system under the conditions of an electric energy meter bringing onto load, it is characterised in that include list, three-phase voltage stabilizing
Power supply, Clusters generating means, adjustable analogue loading device, the single-phase or tested electric energy meter of three-phase, the first photoelectricity are adopted
Sample head, error checking arrangement, the second photoelectricity sampling head and single-phase or three-phase reference electric energy meter；Wherein, described single, three-phase voltage stabilizing
First outfan of power supply is by described Clusters generating means and the described single-phase or arteries and veins of the tested electric energy meter of three-phase
Rushing group's input to connect, single-phase with described or the tested electric energy meter of three-phase the voltage input end of its second outfan is connected, and it is the 3rd years old
Outfan is connected by single-phase with described or the tested electric energy meter of three-phase the current input terminal of described adjustable analogue loading device；Described
The light pulse outfan of the tested electric energy meter of single-phase or three-phase is connected with error checking arrangement by the first photoelectricity sampling head, described mistake
The difference voltage output end of calibration equipment and current output terminal and described single-phase or three-phase are with reference to electric energy meter, described single-phase or three coherents
Light pulse outfan according to electric energy meter is connected with described error checking arrangement by the second photoelectricity sampling head；Described first, second
Photoelectricity sampling head includes receiving portion, sucker, signal adapter and plug, described signal adapter with between plug with being connected wire
Link together；Wherein, described receiving portion is a receiving transducer, and it is separated from each other with signal adapter, described receiving transducer
Being connected with the external connection of described signal adapter by a copper core bent stick, described sucker is fixed in described copper core bent stick.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610798464.0A CN106154212B (en) | 2016-08-31 | 2016-08-31 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610798464.0A CN106154212B (en) | 2016-08-31 | 2016-08-31 | A kind of EFT/B immunity experiment system under the conditions of electric energy meter bringing onto load |
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| CN106154212A true CN106154212A (en) | 2016-11-23 |
| CN106154212B CN106154212B (en) | 2019-04-30 |
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Cited By (2)
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| 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 |
| CN109799411A (en) * | 2019-03-27 | 2019-05-24 | 杭州泰鼎检测技术有限公司 | A kind of large-current electric Clusters jamming immunity tester and its test method |
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| 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 |
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| CN109799411A (en) * | 2019-03-27 | 2019-05-24 | 杭州泰鼎检测技术有限公司 | A kind of large-current electric Clusters jamming immunity tester and its test method |
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| Publication number | Publication date |
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| CN106154212B (en) | 2019-04-30 |
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Address after: 214000, 256, Xincheng Road, ring garden, Wuxi, Jiangsu, Yixing Patentee after: Jiangsu Senwei Electronics Co., Ltd Address before: 214000, 256, Xincheng Road, ring garden, Wuxi, Jiangsu, Yixing Patentee before: YIXING SAVING ELECTRIC Co.,Ltd. |
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