CN204631218U - A kind of single-phase electric energy meter on-load switch break-make identification circuit - Google Patents
A kind of single-phase electric energy meter on-load switch break-make identification circuit Download PDFInfo
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- CN204631218U CN204631218U CN201520275682.7U CN201520275682U CN204631218U CN 204631218 U CN204631218 U CN 204631218U CN 201520275682 U CN201520275682 U CN 201520275682U CN 204631218 U CN204631218 U CN 204631218U
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Abstract
The utility model is applicable to single-phase electric energy meter field, provides a kind of single-phase electric energy meter on-load switch break-make identification circuit, comprising: diode D1, resistance R, resistance R4, electric capacity C1, electric capacity C2 and photoelectrical coupler OP1; Connecting to neutral line after the 1 pin contact resistance R of described photoelectrical coupler OP1 and electric capacity C1,2 pin connect the output terminal of described on-load switch, 3 pin ground connection, and 4 pin are break-make identification mouth; The both positive and negative polarity of described diode D1 connects 2 pin and 1 pin of described photoelectrical coupler OP1 respectively; 4 pin of described photoelectrical coupler OP1 are also connected to DC voltage VCC through resistance R4 respectively, through electric capacity C2 ground connection.Utilize resistance-capacitance depressurization principle and half-wave rectification principle, circuit connects simple, realizes the low-power consumption of identification circuit; Circuit correctly can judge the duty of on-load switch, safe and reliable; Be conducive to the energy-saving and cost-reducing of the whole table of electric energy meter.
Description
Technical field
The utility model belongs to single-phase electric energy meter field, particularly relates to a kind of single-phase electric energy meter on-load switch break-make identification circuit.
Background technology
Single-phase electric energy meter conventional is in the market with on-load switch, after electric energy meter sends energising or power off command to on-load switch, the information feed back such as all need to obtain on-load switch whether whether state and state of a control consistent after correct operation, action, to ensure Electrical Safety.
There is different schemes in each producer of on-load switch on off operating mode identification circuit, name is called " electric energy meter on-load switch testing circuit " (application number: 201320347078.1, authorized announcement date on Dec 11st, 2013) Chinese utility model patent, disclosed technical scheme is on the basis of prior art, measure the signal of " live wire enters " and " live wire goes out " of on-load switch simultaneously, can judge while judging the break-make of on-load switch whether the live wire in-out end of electric energy meter connects instead, but after the fire wire output end that metering circuit is on-load switch or input termination current-limiting resistance R1, connect 1 pin of optocoupler OP1 again, optocoupler OP12 pin connecting to neutral line, 3 pin ground connection, carry out test after 4 pin connecting resistance R2 to judge.
But on-load switch is external on-load switch particularly, power supply is connected on electric energy meter rear end, on-load switch itself also can as a part for load, its power consumption also can include electric energy metrical in, if designed on-load switch control module power consumption is excessive, when there will be electric energy meter idle condition, electric energy adds up, and affects electric energy metrical, this can produce the low-power consumption of a large amount of electricity consumption disputes how realizing circuit under the prerequisite ensureing circuit reliability, be we now faced by a problem.
Utility model content
The object of the utility model embodiment is to provide a kind of single-phase electric energy meter on-load switch break-make identification circuit, to solve the high problem of prior art on-load switch power consumption.
The utility model embodiment is achieved in that a kind of single-phase electric energy meter on-load switch break-make identification circuit, and described circuit comprises: described circuit comprises: diode D1, resistance R, resistance R4, electric capacity C1, electric capacity C2 and photoelectrical coupler OP1;
Connecting to neutral line after the 1 pin contact resistance R of described photoelectrical coupler OP1 and electric capacity C1,2 pin connect the output terminal of described on-load switch, 3 pin ground connection, and 4 pin are break-make identification mouth;
The both positive and negative polarity of described diode D1 connects 2 pin and 1 pin of described photoelectrical coupler OP1 respectively.
In first preferred embodiment of a kind of single-phase electric energy meter on-load switch break-make identification circuit that the utility model provides: 4 pin of described photoelectrical coupler OP1 are also connected to DC voltage VCC through resistance R4 respectively, through electric capacity C2 ground connection.
In first preferred embodiment of a kind of single-phase electric energy meter on-load switch break-make identification circuit that the utility model provides: described electric capacity C1 is safety electric capacity.
The beneficial effect of two kinds of single-phase electric energy meter on-load switch break-make identification circuits that the utility model embodiment provides comprises:
Utilize half-wave rectification principle to realize low-power consumption, utilize resistance-capacitance depressurization principle to realize low-power consumption, circuit connects simple, correctly can judge the duty of on-load switch, safe and reliable; Be conducive to the energy-saving and cost-reducing of the whole table of electric energy meter.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the circuit theory diagrams of a kind of single-phase electric energy meter on-load switch break-make identification circuit that the utility model embodiment provides.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
In order to technical scheme described in the utility model is described, be described below by specific embodiment.
Be illustrated in figure 1 the structural representation of a kind of single-phase electric energy meter on-load switch break-make identification circuit that the utility model provides, described circuit comprises: diode D1, resistance R, resistance R4, electric capacity C1, electric capacity C2 and photoelectrical coupler OP1.
Connecting to neutral line after the 1 pin contact resistance R (what provide in figure is the situation that R1, R2 and R3 connect) of photoelectrical coupler OP1 and electric capacity C1, utilize resistance-capacitance depressurization principle to reduce power consumption, 2 pin connected load output switching terminals, 3 pin ground connection, 4 pin are break-make identification mouth.
Wherein, the both positive and negative polarity of diode D1 connects 2 pin and 1 pin of photoelectrical coupler OP1 respectively; Half-wave rectification is carried out to on-load switch output end signal, reduces power consumption.
4 pin of photoelectrical coupler OP1 are also connected to DC voltage VCC through resistance R4 respectively, are connected to GND through electric capacity C2.
Electric capacity C1 is safety electric capacity.
The utility model embodiment, utilizes resistance-capacitance depressurization principle and half-wave rectification principle, and circuit connects simple, realizes the low-power consumption of identification circuit; Circuit correctly can judge the duty of on-load switch, safe and reliable; Be conducive to the energy-saving and cost-reducing of the whole table of electric energy meter.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. a single-phase electric energy meter on-load switch break-make identification circuit, is characterized in that, described circuit comprises: diode D1, resistance R, resistance R4, electric capacity C1, electric capacity C2 and photoelectrical coupler OP1;
Connecting to neutral line after the 1 pin contact resistance R of described photoelectrical coupler OP1 and electric capacity C1,2 pin connect the output terminal of described on-load switch, 3 pin ground connection, and 4 pin are break-make identification mouth;
The both positive and negative polarity of described diode D1 connects 2 pin and 1 pin of described photoelectrical coupler OP1 respectively.
2. single-phase electric energy meter on-load switch break-make identification circuit as claimed in claim 1, it is characterized in that, 4 pin of described photoelectrical coupler OP1 are also connected to DC voltage VCC through resistance R4 respectively, through electric capacity C2 ground connection.
3. single-phase electric energy meter on-load switch break-make identification circuit as claimed in claim 1, it is characterized in that, described electric capacity C1 is safety electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520275682.7U CN204631218U (en) | 2015-04-29 | 2015-04-29 | A kind of single-phase electric energy meter on-load switch break-make identification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520275682.7U CN204631218U (en) | 2015-04-29 | 2015-04-29 | A kind of single-phase electric energy meter on-load switch break-make identification circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204631218U true CN204631218U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520275682.7U Expired - Fee Related CN204631218U (en) | 2015-04-29 | 2015-04-29 | A kind of single-phase electric energy meter on-load switch break-make identification circuit |
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| CN (1) | CN204631218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187267A (en) * | 2019-06-06 | 2019-08-30 | 杭州海兴电力科技股份有限公司 | Single-phase three-wire intelligent electric meter relay status detection circuit and method |
-
2015
- 2015-04-29 CN CN201520275682.7U patent/CN204631218U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187267A (en) * | 2019-06-06 | 2019-08-30 | 杭州海兴电力科技股份有限公司 | Single-phase three-wire intelligent electric meter relay status detection circuit and method |
| CN110187267B (en) * | 2019-06-06 | 2021-08-13 | 杭州海兴电力科技股份有限公司 | Single-phase three-wire intelligent ammeter relay state detection circuit and method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20210429 |
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| CF01 | Termination of patent right due to non-payment of annual fee |