CN204992521U - Electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit - Google Patents
Electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit Download PDFInfo
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- CN204992521U CN204992521U CN201520697908.2U CN201520697908U CN204992521U CN 204992521 U CN204992521 U CN 204992521U CN 201520697908 U CN201520697908 U CN 201520697908U CN 204992521 U CN204992521 U CN 204992521U
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Abstract
The utility model discloses an electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit, wherein single -phase electric energy meter operates a switch control circuit and includes zero -cross detection module, controller and compound control switch, and zero -cross detection module is including current -limiting module, energy -conserving module, protective film piece and the opto -coupler module of series connection in proper order, and the current -limiting module comprises current -limiting resistor, energy -conserving module comprises the diode for negative half cycle at the power line wave form closes the breaking of contact, the protective film piece is used for the protection circuit not strikeed by electric power system, the opto -coupler module is used for detecting the zero crossing of power line wave form to output signal is to the controller. The utility model discloses an energy -conserving diode, control circuit does not switch on at the negative half cycle of electric power wave form, therefore the energy consumption is lower, adopt the protective film piece to prevent effectively that electric power system from strikeing zero -cross detection module's electric energy, improved the stability and the reliability of circuit, use control circuit's electric energy meter is owing to avoided the relay to draw arc therefore long service life.
Description
Technical field
The present invention is specifically related to a kind of single-phase electric energy meter and operates a switch control circuit and the electric energy meter made with this circuit.
Background technology
Along with the development of electric power system, single-phase intelligent electric energy meter measurement technology is also at development; Single-phase intelligent electric energy meter is wanted when larger load current, still can to realize accurate-metering.If but the control relay in table is operated a switch at the peak value of the big current of electric energy meter, larger arcing will be produced when operating a switch, with arcing by the larger arc light of generation and spark, easily ablation is formed to the coating of contact, the contact resistance of relay is made to increase, return loss is increased, and after using for a long time, relay just likely damages.
In prior art, existed electrical network Direct driver over-zero action single-phase magnetic latching relay (number of patent application: 201020287850.1), this relay is used in single-phase electric energy meter, effectively can solve the arcing of relay, arc light and spark problems; But electric energy meter as above and over-zero action relay thereof, its zero cross detection circuit easily produces fault; And apply the electric energy meter of single-phase magnetic latching relay of this electrical network Direct driver over-zero action, do not do any conservation measures, therefore electric energy meter self energy consumption is higher.
Utility model content
One of the purpose of this utility model is to provide a kind of reliable and stable, that failure rate is low, energy consumption are lower single-phase electric energy meter to operate a switch control circuit.
Two of the purpose of this utility model is to provide a kind of utilize described single-phase electric energy meter to operate a switch electric energy meter that control circuit makes.
This single-phase electric energy meter that the utility model provides is operated a switch control circuit, comprise zero passage detection module, controller and load control switch, it is characterized in that zero passage detection module comprises current limliting module, energy-saving module and optical coupling module, the input of current limliting module is connected with power line, and output connects energy-saving module; Energy-saving module is made up of diode, for the negative half period breaking circuit in power line waveform; Energy-saving module connects optical coupling module again, is detected the zero crossing of power line waveform by optical coupling module, and output signal is to controller.
Described zero passage detection module also comprises protection module, and protection module is serially connected between energy-saving module and optical coupling module, for the protection of optocoupler not by the impact of power grid energy.
Described current limliting module is made up of current-limiting resistance.
Described protection module is made up of protective resistance.
A kind of single-phase electric energy meter utilizing described single-phase electric energy meter to operate a switch made by control circuit, described single-phase electric energy meter control circuit of operating a switch is connected with the input/output end port of single-phase electric energy table controller, for providing the zero cross signal of power line waveform to single-phase electric energy meter, single-phase electric energy meter is operated a switch at the zero crossing of power line waveform, extends the useful life of single-phase electric energy meter.
The utility model have employed energy-conservation diode, zero cross detection circuit not conducting in the negative half period waveform of electric power system due to zero passage detection module, and therefore the utility model energy consumption is lower; In addition, because zero passage protection module have employed protective resistance, therefore, it is possible to effectively prevent electric power system from impacting the electric energy of zero passage detection module, improve stability and the reliability of circuit, reduce failure rate; Utilize the single-phase electric energy meter that described circuit is made, due to the zero crossing of power line waveform can be detected and operate a switch at the zero crossing of power line waveform, therefore avoid the Lahu of electric energy meter, extend the useful life of electric energy meter.
Accompanying drawing explanation
Fig. 1 is that single-phase electric energy meter of the present utility model is operated a switch control circuit module map.
Fig. 2 is the functional block diagram of zero passage detection module of the present utility model.
Fig. 3 is the circuit theory diagrams of a kind of specific embodiment of zero passage detection module of the present utility model.
Embodiment
As shown in Figure 1, for single-phase electric energy meter of the present utility model is operated a switch the module map of control circuit: single-phase electric energy meter control circuit of operating a switch comprises zero passage detection module, controller and on-load switch, the input of zero passage detection module connects live wire and the zero line of power line 220V, after zero passage detection module detects zero cross signal, zero cross signal is sent into the controller of electric energy meter, controller again control overhead control switch disconnects power line at power voltage line waveform pass zero point, thus realizes solving the process of the arcing of load control switch when switch disconnects, arc light and spark.
As Fig. 2 ~ Figure 3 shows that the functional block diagram of zero passage detection module of the present utility model and a kind of circuit theory diagrams of specific embodiment.Zero passage detection module comprises the current limliting module, energy-saving module, protection module and the optical coupling module that are connected in series successively.
Specific in circuit theory Fig. 3, current limliting module is made up of (indicating resistance R230, R231, R232 and R233 in figure) current-limiting resistance, and four current-limiting resistances are connected on zero line; Energy-saving module is made up of diode (indicating D201 in figure), and diode is serially connected on zero line, for the voltage waveform of electric power system at negative half period time breaking circuit, thus reduce the energy consumption of zero cross detection circuit, improve system effectiveness; Protection module is made up of protective resistance (indicating R239 in figure), and protective resistance is connected in parallel on optical coupling module two ends, for the protection of optical coupling module not by the energy impact of electric power system; Optical coupling module is used for the zero crossing of testing circuit voltage, and will detect that the signal of zero crossing delivers to controller from output; In addition, the output of optical coupling module, also by a pull down resistor (indicating R238 in figure) and filter capacitor (indicating C130 in a figure) ground connection, ensures the stability of signal.
Claims (5)
1. a single-phase electric energy meter is operated a switch control circuit, comprise zero passage detection module, controller and load control switch, it is characterized in that zero passage detection module comprises current limliting module, energy-saving module and optical coupling module, the input of current limliting module is connected with power line, and output connects energy-saving module; Energy-saving module is made up of diode, for the negative half period breaking circuit in power line waveform; Energy-saving module connects optical coupling module again, is detected the zero crossing of power line waveform by optical coupling module, and output signal is to controller.
2. single-phase electric energy meter according to claim 1 is operated a switch control circuit, and it is characterized in that described zero passage detection module also comprises protection module, protection module is serially connected between energy-saving module and optical coupling module, for the protection of optocoupler by the impact of power grid energy.
3. single-phase electric energy meter according to claim 1 and 2 is operated a switch control circuit, it is characterized in that described current limliting module is made up of current-limiting resistance.
4. single-phase electric energy meter according to claim 2 is operated a switch control circuit, it is characterized in that described protection module is made up of protective resistance.
5. an electric energy meter, is characterized in that comprising the described single-phase electric energy meter of one of claim 1 ~ 4 and to operate a switch control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520697908.2U CN204992521U (en) | 2015-09-10 | 2015-09-10 | Electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520697908.2U CN204992521U (en) | 2015-09-10 | 2015-09-10 | Electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992521U true CN204992521U (en) | 2016-01-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520697908.2U Active CN204992521U (en) | 2015-09-10 | 2015-09-10 | Electric energy meter that single -phase electric energy meter operated a switch control circuit and made with this circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992521U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680550A (en) * | 2017-01-12 | 2017-05-17 | 中国计量大学 | Three-phase four-wire electric energy meter with precise zero-crossing phase line switching |
| CN109347073A (en) * | 2018-10-12 | 2019-02-15 | 无锡圣普电力科技有限公司 | A kind of intelligence is operated a switch contactor and its control method |
| CN113471929A (en) * | 2021-05-31 | 2021-10-01 | 宁波三星医疗电气股份有限公司 | Switching-out control method of electric energy meter |
-
2015
- 2015-09-10 CN CN201520697908.2U patent/CN204992521U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106680550A (en) * | 2017-01-12 | 2017-05-17 | 中国计量大学 | Three-phase four-wire electric energy meter with precise zero-crossing phase line switching |
| CN106680550B (en) * | 2017-01-12 | 2019-07-30 | 中国计量大学 | With the accurate three-phase and four-line electric energy meter for crossing zero phase line switching |
| CN109347073A (en) * | 2018-10-12 | 2019-02-15 | 无锡圣普电力科技有限公司 | A kind of intelligence is operated a switch contactor and its control method |
| CN113471929A (en) * | 2021-05-31 | 2021-10-01 | 宁波三星医疗电气股份有限公司 | Switching-out control method of electric energy meter |
| CN113471929B (en) * | 2021-05-31 | 2023-05-23 | 宁波三星医疗电气股份有限公司 | Switching-off control method of electric energy meter |
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