CN206757027U - Live virtual load calibration equipment based on empty electric current device - Google Patents
Live virtual load calibration equipment based on empty electric current device Download PDFInfo
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- CN206757027U CN206757027U CN201720390600.2U CN201720390600U CN206757027U CN 206757027 U CN206757027 U CN 206757027U CN 201720390600 U CN201720390600 U CN 201720390600U CN 206757027 U CN206757027 U CN 206757027U
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Abstract
It the utility model is related to a kind of live virtual load calibration equipment based on empty electric current device, including several electric energy meters, the electric energy meter includes the first current entry, first electricity outlet, zero line port, including programmable AC power supply, the programmable AC power supply includes voltage port and electric current port, the voltage port includes several FireWire port ports and a zero line port, the FireWire port port quantity is identical with electric energy meter quantity, and each FireWire port port connects a live wire respectively, zero line port connects a zero line, the electric current port includes the second current entry and the second electricity outlet, and connected between the two by a wire and form current loop.By programmable AC power supply control voltage, the value of electric current, dummy load is simulated, the verification to single-phase electric energy is realized with reference to current transformer, the watchcase without opening electric energy meter disconnects voltage x current short circuit piece（Break off relations）, lift field electric energy table verifying work efficiency.
Description
Technical field
A kind of virtual load calibration equipment is the utility model is related to, more particularly to a kind of scene void based on empty electric current device is born
Lotus calibration equipment.
Background technology
Single-phase electric energy meter largely uses in resident at present, because it has a large capacity and a wide range, numerous producers and model, and
Installation and operation environmental complexity diversity, various problems unavoidably occur in the process of running, it is necessary to by special
Industry staff carries out field test using Watt-hour meter's field test equipment.Traditional field-checking equipment is with real load check side
Based on formula, the normal power electric energy meter at scene is only applicable to, verification mode is single, can only be examined for the existing real load of fixation
Test, more comprehensive inspection can not be realized.When onsite user is without power load or smaller power load, or even work can not be carried out
Make.Same problem is also run into during analog simulation single-phase electric energy meter running environment, how to be provided for single-phase electric energy meter can
Variable load is controlled, how to carry out comprehensive error checking to the single-phase electric energy meter under simulated environment in real time, needs solve
Problem.
Referring to Fig. 1, in the checkout procedure using real load check method, power and load measured by electric energy meter and detection table
Actual consumption or the power of power supply effective supply are consistent, and the electric current for flowing through ammeter loop is by the electricity on relevant voltage loop
Caused current value on load is pressed in, meets Ohm's law.Using single-phase electric energy meter wiring such as Fig. 1 institutes of real load check method
Show, access detection table can be verified between load and verified ammeter.The advantages of this real load check method is by school
Ammeter can be verified in operation, and shortcoming is that power consumption is big, proof load point is single, in the case of load is less at the scene by
Limitation.
And virtual load check addition be specified in specification, it is widely used by ammeter manufacturer and Utilities Electric Co.
A kind of Ammeter Test method.The structured flowchart of its verifying attachment is as shown in Figure 2.
The method of calibration does not have actual load, defeated by voltage source independent all the way and current source analog circuit independent all the way
Enter power, virtual power source can be exported with separately adjustable voltage and current, and voltage and current frequency is identical, and virtual power source can be with
The phase of control voltage and electric current, it is like to have actual electrical appliance in consumption power.Electric energy meter is according to voltage, electric current and phase
Position measurement power.Because electric current, voltage separation power are low, therefore more electric energy meters can be verified simultaneously.Its shortcoming is table to be opened
Shell disconnects voltage-to-current short circuit piece（Break off relations）, it is not easy to implement at operation scene.
The content of the invention
The purpose of this utility model be that provide one kind solve the above problems, use empty electric current device with meet scene or
The demand verified under simulated environment using virtual load method of inspection to single-phase electric energy meter, and without frequently opening meter shell of electric energy meter
The live virtual load calibration equipment based on empty electric current device.
To achieve these goals, the technical solution adopted in the utility model is such：One kind is based on empty electric current device
Live virtual load calibration equipment, including several electric energy meters, the electric energy meter include the first current entry, the first electricity outlet,
Zero line port, including programmable AC power supply, the programmable AC power supply include voltage port and electric current port, the voltage port
Including several FireWire port ports and a zero line port, the FireWire port port quantity is identical with electric energy meter quantity, and each FireWire port port
A live wire is connected respectively, zero line port connects a zero line, and the electric current port includes the second current entry and the second electricity outlet,
And connected between the two by a wire and form current loop；
Current loop is provided with the several and one-to-one current transformer of electric energy meter, the current transformer input string
Current loop is associated in, output end forms loop, the electric energy meter with the first current entry, the first electricity outlet of corresponding electric energy meter
The first current entry also connected one to one with live wire, the zero line port of electric energy meter is connected with zero line.
As preferred：The empty electric current device is current transformer, and its electric current no-load voltage ratio is 1:1.
Compared with prior art, the utility model has the advantage of：Pass through programmable AC power supply control voltage, electric current
Value, dummy load is simulated, the verification to single-phase electric energy is realized with reference to current transformer, without opening the watchcase of electric energy meter electricity
Piezo-electric stream short circuit piece disconnects（Break off relations）, field electric energy table verifying work efficiency is lifted, is 0.05 grade from precision herein
Current transformer, it can meet that electric energy meter precision of having good luck is 0.1 grade of requirement.
Brief description of the drawings
Fig. 1 is the real load check method and virtual load check addition schematic diagram of single-phase electric energy meter；
Fig. 2 is the structural representation of virtual load check addition verifying attachment in the prior art；
Fig. 3 is the utility model structure diagram.
In figure：1st, the first current entry；2nd, the first electricity outlet；3rd, the first zero line port；4th, the second zero line port；5th,
Two electricity outlets；6th, the second current entry；7th, current transformer.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Embodiment 1：From fig. 1, it can be seen that the advantages of this real load check method, can be verified in operation by school ammeter,
Shortcoming is that power consumption is big, proof load point is single, is restricted in the case of load is less at the scene.
As can be seen from Figure 2, the method for calibration does not have actual load, by voltage source independent all the way and current source independent all the way
Analog circuit input power, virtual power source can be exported with separately adjustable voltage and current, and voltage and current frequency is identical, virtually
Power source can be like to have actual electrical appliance in consumption power with control voltage and the phase of electric current.Electric energy meter is according to electricity
Pressure, electric current and phase measurement power.Because electric current, voltage separation power are low, therefore more electric energy meters can be verified simultaneously.Its shortcoming
It is that watchcase to be opened disconnects voltage-to-current short circuit piece, that is, breaks off relations, is not easy to implement at operation scene.
As can be seen from Figure 3, a kind of live virtual load calibration equipment based on empty electric current device, including several electric energy meters, it is described
Electric energy meter includes the first current entry 1, the first electricity outlet 2, zero line port, in addition to programmable AC power supply, the program control friendship
Stream power supply includes voltage port and electric current port, and the voltage port includes several FireWire port ports and a zero line port, the fire
Line port number is identical with electric energy meter quantity, and each FireWire port port connects a live wire respectively, and zero line port connects a zero line, institute
Stating electric current port includes the second current entry 6 and the second electricity outlet 5, and is connected between the two by a wire and form electric current time
Road, current loop are provided with the several and one-to-one current transformer 7 of electric energy meter, the input of current transformer 7 series connection
In current loop, output end forms loop, the electric energy meter with the first current entry 1, the first electricity outlet 2 of corresponding electric energy meter
The first current entry 1 also connected one to one with live wire, the zero line port of electric energy meter is connected with zero line.
In the present embodiment, the empty electric current device is current transformer 7, and its electric current no-load voltage ratio is 1:1.In addition, electric energy meter
Zero line port, be made up of the first zero line port 3, the short circuit of the second zero line port 4.
In the utility model, empty electric current device is used as using current transformer 7, reaches the effect that electric current is isolated with voltage
Fruit, while ensure that the measuring accuracy having good luck.Ensure the uniformity with onsite application state, all ammeters realize examination of not breaking off relations
Test.
Herein, by programmable AC power supply control voltage, the value of electric current, dummy load is simulated, with reference to current transformer 7
The verification to single-phase electric energy is realized, the watchcase without opening electric energy meter disconnects voltage-to-current short circuit piece（Break off relations）, lifting scene
Electrical energy meter calibration operating efficiency, it is 0.05 grade of current transformer 7 from precision herein, can meets that electric energy meter is had good luck precision
For 0.1 grade of requirement.
Claims (2)
1. a kind of live virtual load calibration equipment based on empty electric current device, including several electric energy meters, the electric energy meter includes the
One current entry, the first electricity outlet, zero line port, it is characterised in that：Including programmable AC power supply, the programmable AC power supply
Including voltage port and electric current port, the voltage port includes several FireWire port ports and a zero line port, the FireWire port port
Quantity is identical with electric energy meter quantity, and each FireWire port port connects a live wire respectively, and zero line port connects a zero line, the electric current
Port includes the second current entry and the second electricity outlet, and is connected between the two by a wire and form current loop；
Current loop is provided with the several and one-to-one current transformer of electric energy meter, and the current transformer input is connected on
Current loop, the first current entry, the first electricity outlet of output end and corresponding electric energy meter form loop, and the of the electric energy meter
One current entry is also connected one to one with live wire, and the zero line port of electric energy meter is connected with zero line.
2. the live virtual load calibration equipment according to claim 1 based on empty electric current device, it is characterised in that：The void
Current device is current transformer, and its electric current no-load voltage ratio is 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390600.2U CN206757027U (en) | 2017-04-14 | 2017-04-14 | Live virtual load calibration equipment based on empty electric current device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720390600.2U CN206757027U (en) | 2017-04-14 | 2017-04-14 | Live virtual load calibration equipment based on empty electric current device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206757027U true CN206757027U (en) | 2017-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720390600.2U Expired - Fee Related CN206757027U (en) | 2017-04-14 | 2017-04-14 | Live virtual load calibration equipment based on empty electric current device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828498A (en) * | 2018-09-03 | 2018-11-16 | 海盐星创电子有限公司 | A kind of device and its application method for realizing ammeter double loop while loading current |
| CN108845286A (en) * | 2018-09-03 | 2018-11-20 | 海盐星创电子有限公司 | Calibration equipment while a kind of two current loops of single-phase electric energy meter |
| CN109001666A (en) * | 2018-09-03 | 2018-12-14 | 海盐星创电子有限公司 | Output device while a kind of realization different electric currents using current transformer |
| CN112748389A (en) * | 2019-10-31 | 2021-05-04 | 河南许继仪表有限公司 | On-site intelligent single-phase electric energy meter fault diagnosis instrument |
| CN114089245A (en) * | 2021-11-22 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Meter checking instrument |
-
2017
- 2017-04-14 CN CN201720390600.2U patent/CN206757027U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108828498A (en) * | 2018-09-03 | 2018-11-16 | 海盐星创电子有限公司 | A kind of device and its application method for realizing ammeter double loop while loading current |
| CN108845286A (en) * | 2018-09-03 | 2018-11-20 | 海盐星创电子有限公司 | Calibration equipment while a kind of two current loops of single-phase electric energy meter |
| CN109001666A (en) * | 2018-09-03 | 2018-12-14 | 海盐星创电子有限公司 | Output device while a kind of realization different electric currents using current transformer |
| CN108845286B (en) * | 2018-09-03 | 2024-01-02 | 海盐星创电子有限公司 | Simultaneous calibration device for two current loops of single-phase electric energy meter |
| CN112748389A (en) * | 2019-10-31 | 2021-05-04 | 河南许继仪表有限公司 | On-site intelligent single-phase electric energy meter fault diagnosis instrument |
| CN114089245A (en) * | 2021-11-22 | 2022-02-25 | 广东电网有限责任公司广州供电局 | Meter checking instrument |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171215 Termination date: 20180414 |
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| CF01 | Termination of patent right due to non-payment of annual fee |