CN2738255Y - Low-power consumption three-phase electronic type electric energy meter - Google Patents
Low-power consumption three-phase electronic type electric energy meter Download PDFInfo
- Publication number
- CN2738255Y CN2738255Y CN 200420111171 CN200420111171U CN2738255Y CN 2738255 Y CN2738255 Y CN 2738255Y CN 200420111171 CN200420111171 CN 200420111171 CN 200420111171 U CN200420111171 U CN 200420111171U CN 2738255 Y CN2738255 Y CN 2738255Y
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- CN
- China
- Prior art keywords
- phase
- control module
- power consumption
- energy meter
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a low-power consumption three-phase electronic type electric energy meter, comprising a three-phase metering unit, a CPU control unit, a display lamp, an electromechanical counter, an outer case, etc., wherein, the three-phase metering unit, the CPU control unit, the display lamp and the electromechanical counter are integrated on a PCB plate. The whole PCB plate is positioned in a set of plastic electric meter case and fixed by self-tapping screws. The utility model is characterized in that a voltage detection identification unit is connected between the input port of each phase voltage and the data input pin of the CPU control unit. Because the utility model adopts a mode that each phase metering unit separately supplies power and the voltage detection identification unit is added, the open-phase metering unit can work without power supply when the utility model appears the case of open-phase. So the power consumption of the complete machine is reduced and electric energy is saved.
Description
Technical field
The utility model belongs to a kind of electric energy metrical product, is a kind of low-power consumption three phases electronic energy meter specifically.
Background technology
Three phases electronic energy meter uses very extensive in the market, when phase failure situation occurring, the meeting that has proposes prompting, but in the electric energy meter to the Measuring and testing circuit of each phase equally still in work, the unnecessary power consumption that so just made the three phases electronic energy meter autophage.
Summary of the invention
The purpose of this utility model provides a kind of when phase failure situation occurring, stops the Measuring and testing circuit of this phase is provided the low-power consumption three phases electronic energy meter of power supply in the electronic electric energy meter, to overcome above-mentioned deficiency.
To achieve these goals, the utility model is made of three phase metering unit, CPU control module, LED lamp, electromechanical electricity meter counter, shell etc., and wherein three phase metering unit, CPU control module, LED lamp, electromechanical electricity meter counter are integrated on the pcb board.Whole pcb board is contained in the sleeving plastic ammeter shell, fixes with self-tapping screw, is characterized in: also be connected with a voltage detecting recognition unit between each phase voltage input end and CPU control module data input pin;
Above-mentioned voltage detecting recognition unit is made of divider resistance, and divider resistance is connected between the power cathode of each phase voltage input end and CPU control module, and the voltage division signal output terminal is connected with CPU control module data input pin;
Control signal of above-mentioned CPU control module output with each mutually the power switch control end of metering units be connected.
Because the utility model adopts the separately mode of power supply of each phase metering units, has also increased the voltage detecting recognition unit, makes the utility model when phase failure situation occurring, the metering units of the phase failure is with regard to non-transformer work, and reduced the power consumption of complete machine, saves energy.
Description of drawings
Accompanying drawing is the utility model theory diagram.
Embodiment
Further specify the utility model below in conjunction with accompanying drawing.
The utility model is made of three phase metering unit W-A, W-B, W-C, CPU control module, display lamp LED1, electromechanical electricity meter counter CRT, shell etc., and wherein three phase metering unit, CPU control module, display lamp LED1, electromechanical electricity meter counter CRT are integrated on the pcb board.Whole pcb board is contained in the sleeving plastic ammeter shell, fix with self-tapping screw, also be connected with a voltage detecting recognition unit V-A, V-B, V-C between each phase voltage input end (A, B, C) and CPU control module data input pin, the utility model complete machine is powered by power circuit DC.
The utility model adopts the electric energy of three single-phase computation chip W-A of special use, W-B, W-C metering A, B, C three-phase, add that specialized voltages detects recognition unit V-A, V-B, V-C monitor supply line's voltage in real time and supply with situation, sampled signal after the CPU control module is handled, the electric power thus supplied of gathering each phase metering circuit automatically; If there is the voltage of a phase not supply with, then the CPU control module can be with power supply DC-A or the DC-B or the DC-C disconnection of this phase metering circuit; Because this phase metering circuit is in not "on" position, then this phase metering circuit can consumed power, reduces the power consumption of complete machine with this.Also with a unusual situation of unusual pilot lamp LED2 indication supply voltage, remind user and installation and maintenance personnel to note with this, simultaneously for the power supply maintenance is provided convenience.
Principle of work of the present utility model is: during user power utilization, utilize the active power of the real-time sensing lead of special-purpose electric energy computation chip and be converted to the pulse signal corresponding with power; The CPU control module accurately calculates the related data that the user uses electric energy by handling pulse signal, and exports the dynamo-electric electricity meter counter CRT of pulsed drive in real time, and the electric degree digital display that the user has been used by dynamo-electric electricity meter counter CRT illustrates; CPU control module processes voltage detection signal in real time also simultaneously, and control the energising situation of each metering circuit with this.Voltage detecting circuit, cpu control circuit principle are as follows: identification circuit directly is made of divider resistance, supply voltage directly loads whole divider resistance circuit two ends, the voltage sampling signal of cpu control circuit extracts from the lower end resistance of divider resistance circuit, when normal power supply, voltage sampling signal can be one than higher voltage signal, cpu control circuit I/O mouth line can continue power supply to be provided for this phase metering circuit after recognizing this high level signal, guarantees its operate as normal; When abnormal electrical power supply occurring, voltage sampling signal can be a lower voltage signal, cpu control circuit I/0 mouth line recognize can cut off behind this low level signal this phase metering circuit power supply, make it be in off-position, save electric energy, reduce power consumption; Micro Controller Unit (MCU) driving abnormal electrical power supply pilot lamp LED2 is bright simultaneously, reminds user's supply voltage that unusual appearance is arranged.
The content that is not described in detail in this instructions belongs to this area professional and technical personnel's known prior art.
Claims (3)
1, a kind of low-power consumption three phases electronic energy meter, constitute by three phase metering unit, control module CPU, display lamp LED1, electromechanical electricity meter counter CRT, shell etc., wherein three phase metering unit, control module CPU, display lamp LED1, electromechanical electricity meter counter CRT are integrated on the pcb board, whole pcb board is contained in the sleeving plastic ammeter shell, fix with self-tapping screw, it is characterized in that: between each phase voltage input end and control module cpu data input end, also be connected with a voltage detecting recognition unit.
2, low-power consumption three phases electronic energy meter as claimed in claim 1, it is characterized in that: the voltage detecting recognition unit is made of divider resistance, divider resistance is connected between the power cathode of each phase voltage input end and control module CPU, and the voltage division signal output terminal is connected with control module cpu data input end.
3, low-power consumption three phases electronic energy meter as claimed in claim 1 is characterized in that: control signal of control module CPU output with each mutually the power switch control end of metering units be connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111171 CN2738255Y (en) | 2004-11-02 | 2004-11-02 | Low-power consumption three-phase electronic type electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420111171 CN2738255Y (en) | 2004-11-02 | 2004-11-02 | Low-power consumption three-phase electronic type electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2738255Y true CN2738255Y (en) | 2005-11-02 |
Family
ID=35348161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420111171 Expired - Fee Related CN2738255Y (en) | 2004-11-02 | 2004-11-02 | Low-power consumption three-phase electronic type electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2738255Y (en) |
-
2004
- 2004-11-02 CN CN 200420111171 patent/CN2738255Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |