CN201689169U - Detector for low-voltage electric energy metering device - Google Patents
Detector for low-voltage electric energy metering device Download PDFInfo
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- CN201689169U CN201689169U CN2010201725636U CN201020172563U CN201689169U CN 201689169 U CN201689169 U CN 201689169U CN 2010201725636 U CN2010201725636 U CN 2010201725636U CN 201020172563 U CN201020172563 U CN 201020172563U CN 201689169 U CN201689169 U CN 201689169U
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- electric energy
- microprocessor
- current transformers
- detector
- energy meter
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Abstract
A detector for a low-voltage electric energy metering device is used for detecting the working condition of an electric energy meter and comprises a detector host and three main clamp-type current transformers, wherein the detector host comprises a microprocessor, an A/D conversion chip, a keyboard, a display and a memory; the three main clamp-type current transformers are respectively used for metering the primary side current of the three current transformers of the electric energy meter; a current signal and a three-phase voltage signal output by the three main clamp-type current transformers are connected with different input ends of the A/D conversion chip through amplifiers; the A/D conversion chip and the memory are connected with a bus of the microprocessor; the keyboard, the display and a clock chip are connected with different I/O interfaces of the microprocessor; and an A interface of the microprocessor is connected with an electric energy pulse signal output by the electric energy meter. The utility model has simple wiring and complete functions; in addition, the detection result of the electric energy meter can be provided quickly and vividly, and the storage and analysis of the detection data are convenient.
Description
Technical field
The utility model relates to a kind of equipment single-phase or three-phase low voltage electric energy measure device operation conditions that is used to detect, and belongs to the detection technique field.
Background technology
Electricity is the indispensable energy in industrial and agricultural production and the people's daily life, and in order to make rational planning for electricity consumption and collect the electricity charge, power department has been installed measuring apparatus in supply line.Measuring apparatus might break down or suffer artificial destruction after using a period of time, therefore is necessary regularly to detect.
At present, the main tool that is used to detect measuring apparatus is a phase voltammetric meter, and it exists the shortcoming of the following aspects:
When 1, using phase voltammetric meter to carry out measuring apparatus circuit investigation, wiring is very complicated, is difficult to check electric energy meter error and circuit composition error.
2, when phase shortage, three-phase imbalance, voltage deviation occurring and power supply trouble such as exceed standard, phase voltammetric meter can not provide test result intuitively.
3, the field check personnel can't measure the CT error, and to substituting the mutual inductor nameplate for another surreptitiously, electricity filching behaviors such as change CT no-load voltage ratio value are difficult to find.
4, site inspection situation can only adopt hand-kept, is difficult to the statistical data of formation system.
5, energy measurement does not comprise the composition error of circuit, CT, electric energy meter.
The utility model content
The purpose of this utility model is to provide a kind of simple to operate, multiple functional low voltage electric energy measure device detector.
The alleged problem of the utility model realizes with following technical proposals:
A kind of low voltage electric energy measure device detector, it comprises detector main frame and three main clamp current transformers, described detector main frame comprises microprocessor in constituting, the A/D conversion chip, keyboard, display, storer, described three main clamp current transformers are measured the primary side current of three current transformers of electric energy meter respectively, current signal that they are exported and three-phase voltage signal connect the different input ends of A/D conversion chip respectively through amplifier, described A/D conversion chip is connected with the bus of microprocessor with storer, described keyboard, display and clock chip connect the different I/O interface of microprocessor, and the A mouth of microprocessor connects the electrical energy pulse signal output part of electric energy meter.
Above-mentioned low voltage electric energy measure device detector, it also comprises three secondary clamp current transformers, measure the secondary side current of three current transformers of electric energy meter respectively, the current signal that they are exported and three-phase voltage signal connect the different input ends of A/D conversion chip through commutation circuit and amplifier.
Above-mentioned low voltage electric energy measure device detector, it also comprises clock chip, the SCL of described clock chip, SDA end connects D9, the D10 end of microprocessor respectively.
Above-mentioned low voltage electric energy measure device detector, the TXD0 of described microprocessor, RXD0 termination data management PC, TXD1, RXD1 termination USB interface chip.
The electric energy that the utility model is consumed by the voltage and current calculated signals user who gathers supply line, the electric energy of being monitored with the electrical energy pulse signal of electric energy meter compares, and draws the error amount of the two, thereby judges whether measuring apparatus work is normal; Can utilize main clamp current transformer and secondary clamp current transformer to carry out the real-time testing of CT, investigate and prosecute the electricity filching behavior of substituting the CT nameplate for another surreptitiously; The utility model also can be understood reason and the electricity filching behavior of investigation by electric energy meter false wiring mode is carried out that error produces by the correctness of going into terminated line of judging electric energy meter, also can in time find the fault of electric energy meter.Display is used to show the result of measurement, and storer is used to preserve testing result, and keyboard is used to realize man-machine interaction.Compare with traditional phase voltammetric meter, the utility model wiring is simple, multiple functional, can provide the testing result of electric energy meter rapidly and intuitively, and can preserve, analyze detecting data, be convenient to measuring apparatus ruuning situation is followed the trail of and monitored, realize the monitoring management of efficient quick.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the electrical schematic diagram of detector main frame.
Each label is among the figure: U1, microprocessor, U2, clock chip, U3, A/D conversion chip, EM, electric energy meter, PC, data management PC, USB, interface chip, KB, keyboard, LCD, display, DRAM, dynamic RAM; Flash, flash memory, the current transformer of CTa, CTb, CTc, electric energy meter, QA, QB, QC, main clamp current transformer, Qa, Qb, Qc, secondary clamp current transformer, F1～F6, amplifier.
Embodiment
The model of each integrated circuit can be selected U1:DSP320F2812, U2:X1226 for use in the utility model; HY57V561620, U3:AD7656; USB, CH340T certainly, also can select the components and parts of other models for use.
Referring to Fig. 1, Ua, Ub, Uc, Uo is Circuit Fault on Secondary Transformer (low-pressure side circuit) three-phase four-wire power, CTa CTb CTc is metering A, B, C three-phase Current Transformer, QA, QB, QC is for measuring the main clamp current transformer of CT primary side current, Qa, Qb, Qc is for measuring the secondary clamp current transformer of CT secondary side current, the detector main frame is measured CT primary side or CT secondary side electric energy, compare with the electric energy of the electrical energy pulse signal representative of electric energy meter, draw the error amount of the two, thereby judge whether operate as normal of measuring apparatus, show the result who measures in LCDs, simultaneously the result is preserved.
The electric current and voltage commutation circuit can switch to three road voltage signals (Ua Ub Uc) the CT secondary side current signal (ia, ib, ic) of Qa, Qb, Qc output, to measure the error of each CT.
Referring to Fig. 2, three road voltage signals (Ua Ub Uc) or CT secondary side current signal (ia, ib, ic) and three road current signals (Ia Ib Ic) are converted to ac small signal by mutual inductor, insert the detector main frame, each road signal is received by A/D conversion chip U3 (AD7656) after processing and amplifying, carry out conversion of signals, AD7656 adopts six tunnel while Sampling techniques signal to be carried out weekly the real-time sampling of 256 in ripple, guaranteeing computational accuracy, and give microprocessor U1 by bus with sampled result; Microprocessor U1 carries out computing and draws standard energy value, and sampled data and result of calculation are kept at FLASH and DRAM.
U1 is connected with clock chip U2 by the I/O mouth, reads date and time, realizes calendar function.
U1 can realize the management function of data by TXD0, RXD0 and computing machine communication, can carry out statistical study to the stage test data, and makes report printing.
Claims (4)
1. low voltage electric energy measure device detector, it is characterized in that, it comprises detector main frame and three main clamp current transformers, described detector main frame comprises microprocessor (U1), A/D conversion chip (U3), keyboard (KB), display (LCD), storer again, described three main clamp current transformers are connected to primary side current loop in three current transformers of electric energy meter (EM) respectively, and current signal that they are exported and three-phase voltage signal connect the different input ends of A/D conversion chip (U3) respectively through amplifier; Described A/D conversion chip (U3), and storer be connected with microprocessor (U1) through bus; Described keyboard (KB), display (LCD) and clock chip (U2) connect the different I/O interface of microprocessor (U1); The A mouth of microprocessor (U1) connects the electrical energy pulse signal output part of electric energy meter (EM).
2. according to the described low voltage electric energy measure device detector of claim 1, it is characterized in that, it also comprises three secondary clamp current transformers, be connected to the secondary side current loop of three current transformers of electric energy meter, the current signal output end of three secondary clamp current transformers and three-phase voltage signal are connected to the different input ends of A/D conversion chip (U3) behind commutation circuit and amplifier.
3. according to the described low voltage electric energy measure device detector of claim 2, it is characterized in that it also comprises clock chip (U2), SCL, the SDA end of described clock chip (U2) connects D9, the D10 end of microprocessor (U1) respectively.
4. according to the described low voltage electric energy measure device detector of claim 3, it is characterized in that the TXD0 of described microprocessor (U1), RXD0 termination data management PC, TXD1, RXD1 termination USB interface chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725636U CN201689169U (en) | 2010-04-28 | 2010-04-28 | Detector for low-voltage electric energy metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201725636U CN201689169U (en) | 2010-04-28 | 2010-04-28 | Detector for low-voltage electric energy metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689169U true CN201689169U (en) | 2010-12-29 |
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ID=43377449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201725636U Expired - Fee Related CN201689169U (en) | 2010-04-28 | 2010-04-28 | Detector for low-voltage electric energy metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201689169U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149465A (en) * | 2011-12-07 | 2013-06-12 | 英飞凌科技奥地利有限公司 | Meter device |
| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN107479020A (en) * | 2017-07-24 | 2017-12-15 | 杭州华罡智能科技有限公司 | Single-phase measurement Fault Identification device and processing method |
-
2010
- 2010-04-28 CN CN2010201725636U patent/CN201689169U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149465A (en) * | 2011-12-07 | 2013-06-12 | 英飞凌科技奥地利有限公司 | Meter device |
| CN103149465B (en) * | 2011-12-07 | 2016-06-08 | 英飞凌科技奥地利有限公司 | Metering device |
| CN106501761A (en) * | 2016-12-26 | 2017-03-15 | 烟台东方威思顿电气股份有限公司 | Three-phase intelligent electric-energy meter simulation detection system |
| CN106501761B (en) * | 2016-12-26 | 2023-07-21 | 烟台东方威思顿电气有限公司 | Three-phase intelligent ammeter simulation detection system |
| CN107479020A (en) * | 2017-07-24 | 2017-12-15 | 杭州华罡智能科技有限公司 | Single-phase measurement Fault Identification device and processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20140428 |