CN202110215U - Switching detection circuit of relay for electric energy meter - Google Patents
Switching detection circuit of relay for electric energy meter Download PDFInfo
- Publication number
- CN202110215U CN202110215U CN2011202017193U CN201120201719U CN202110215U CN 202110215 U CN202110215 U CN 202110215U CN 2011202017193 U CN2011202017193 U CN 2011202017193U CN 201120201719 U CN201120201719 U CN 201120201719U CN 202110215 U CN202110215 U CN 202110215U
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- CN
- China
- Prior art keywords
- relay
- diode
- electric energy
- coupler
- energy meter
- 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 - Lifetime
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Abstract
A switching detection circuit of a relay for an electric energy meter comprises a voltage reduction module, a diode in series connection with the voltage reduction module, a photo-coupler and working power supplies. The diode is connected to the input end of the photo-coupler in parallel back to back, the output end of the photo-coupler is connected to a capacitor in parallel, both ends of the capacitor are loaded with the working power supplies, and a bleeder resister is arranged between the working power supplies and the capacitor. The forward direction end of the diode is disconnected with power line, and when the relay is in the state of switching out, the forward direction end of the diode is disconnected with the power line. When the relay is in the state of switching on, the forward direction end of the diode is connected with the power line. The switching detection circuit of the relay for the electric energy meter is capable of conveniently and reliably detecting the state of the relay of switching on or switching out. Further, the circuit is simple and the cost is low.
Description
Technical field
The utility model relates to a kind of electric energy meter with relay folding lock testing circuit.
Background technology
Along with the development of national intelligent grid, various intelligent electric energy meters appear on the market of electric energy meter successively.As the intelligence table, drawing lock function is its one of basic functions the most.Through the drawing lock, Utilities Electric Co. can control electricity consumption client's electricity consumption behavior, prevents stealing, and illegal thing such as power stealing takes place.But how guaranteeing behind the drawing lock whether relay is in correct state, then is a same vital problem.
Summary of the invention
In order correctly to judge the relay status after the drawing lock order, the invention provides a kind of effectively succinctly, electric energy meter with low cost is with relay folding lock testing circuit.
Electric energy meter comprises the step-down module with relay folding lock testing circuit, with step-down module diode in series, photo-coupler, and working power;
The input end reverse parallel connection of described diode and photo-coupler, the output terminal of described photo-coupler is parallelly connected with electric capacity, and described electric capacity two ends load described working power, are provided with pressure release resistance between described working power and the electric capacity;
The forward end of described diode is connected with live wire through relay, when relay is in when operating a switch state the forward end of diode and live wire disconnection; When relay was in "on" position, the forward end of diode linked to each other with live wire.
Further, described step-down module is made up of the resistance of four series connection.
The technical conceive of the utility model is: when relay was in "on" position, the optocoupler input end produced the signal of an approximate square wave, at the output terminal of optocoupler, because the existence of electric capacity makes output voltage level and smooth, and approaches 0V; When relay is in when operating a switch state, because the not conducting of optocoupler input end, so the optocoupler output terminal ends, this moment, signal was pulled to high level.
The utility model can be convenient, the drawing lock state of reliable detection relay, and circuit is simple, and with low cost.
Description of drawings
Fig. 1 is the circuit diagram of the utility model.
Embodiment
With reference to accompanying drawing, further specify the utility model:
Electric energy meter comprises the step-down module with relay folding lock testing circuit, with step-down module diode in series D1, photo-coupler O1, and working power;
The input end reverse parallel connection of described diode D1 and photo-coupler O1, the output terminal of described photo-coupler O1 is parallelly connected with capacitor C 1, and described capacitor C 1 two ends load described working power, are provided with pressure release resistance R 5 between described working power and the capacitor C 1;
The forward end of described diode D1 is connected with live wire L through relay, when relay L is in when operating a switch state the forward end of diode D1 and live wire L disconnection; When relay D1 was in "on" position, the forward end of diode D1 linked to each other with live wire L.
Described step-down module is made up of resistance R 1, R2, R3, the R4 of four series connection.
The technical conceive of the utility model is: the step-down module is formed in the resistance R 1～R4 step-down by with low cost, and utilizes one 4148 diode D1 reverse parallelly connected with the input end of optocoupler O1, makes the proud conducting of alternating voltage.Described transport module then is the signal that will be similar to square wave through optocoupler O1, passes to the other end of optocoupler O1.The signal JDQJC of described signal controlling module during with not conducting of optocoupler O1 draws high, and signal JDQJC drags down when optocoupler O1 conducting, and utilizes a capacitor C 1 to make output signal JDQJC voltage level and smooth.
When relay was in "on" position, P2 linked to each other with live wire L, and optocoupler O1 input end produces the signal of an approximate square wave, at the output terminal of optocoupler O1, because the existence of capacitor C 1 makes that output signal JDQJC voltage is level and smooth, and approaches 0V; When relay is in when operating a switch state, P2 and live wire L break off, because the not conducting of optocoupler O1 input end, so optocoupler O1 output terminal ends, this moment, signal JDQJC was pulled to high level by VCC.
It is succinct to the utlity model has circuit, and reliability is high, advantage with low cost.
The described content of this instructions embodiment only is enumerating the way of realization of utility model design; The protection domain of the utility model should not be regarded as and only limit to the concrete form that embodiment states, the protection domain of the utility model also reach in those skilled in the art according to the utility model design the equivalent technologies means that can expect.
Claims (2)
1. electric energy meter is characterized in that with relay folding lock testing circuit: comprise the step-down module, with step-down module diode in series, photo-coupler, and working power;
The input end reverse parallel connection of described diode and photo-coupler, the output terminal of described photo-coupler is parallelly connected with electric capacity, and described electric capacity two ends load described working power, are provided with pressure release resistance between described working power and the electric capacity;
The forward end of described diode is connected with live wire through relay, when relay is in when operating a switch state the forward end of diode and live wire disconnection; When relay was in "on" position, the forward end of diode linked to each other with live wire.
2. electric energy meter as claimed in claim 1 is characterized in that with relay folding lock testing circuit: described step-down module is made up of the resistance of four series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202017193U CN202110215U (en) | 2011-06-15 | 2011-06-15 | Switching detection circuit of relay for electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202017193U CN202110215U (en) | 2011-06-15 | 2011-06-15 | Switching detection circuit of relay for electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202110215U true CN202110215U (en) | 2012-01-11 |
Family
ID=45435661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202017193U Expired - Lifetime CN202110215U (en) | 2011-06-15 | 2011-06-15 | Switching detection circuit of relay for electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202110215U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253334A (en) * | 2011-06-15 | 2011-11-23 | 杭州炬华科技股份有限公司 | Circuit for detecting open and close states of relay for electric energy meter |
| CN108535639A (en) * | 2018-03-27 | 2018-09-14 | 江苏卡欧万泓电子有限公司 | A kind of method of automatic detection intelligent electric meter relay switching on |
| CN109444731A (en) * | 2018-11-08 | 2019-03-08 | 北京汇能精电科技股份有限公司 | DC relay closed state detection device |
| CN110146807A (en) * | 2019-06-05 | 2019-08-20 | 厦门立林电气控制技术有限公司 | A kind of trip coil monitoring circuit and monitoring method |
-
2011
- 2011-06-15 CN CN2011202017193U patent/CN202110215U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253334A (en) * | 2011-06-15 | 2011-11-23 | 杭州炬华科技股份有限公司 | Circuit for detecting open and close states of relay for electric energy meter |
| CN108535639A (en) * | 2018-03-27 | 2018-09-14 | 江苏卡欧万泓电子有限公司 | A kind of method of automatic detection intelligent electric meter relay switching on |
| CN109444731A (en) * | 2018-11-08 | 2019-03-08 | 北京汇能精电科技股份有限公司 | DC relay closed state detection device |
| CN110146807A (en) * | 2019-06-05 | 2019-08-20 | 厦门立林电气控制技术有限公司 | A kind of trip coil monitoring circuit and monitoring method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 310030 No. 9 Longtan Road, front street, Yuhang District, Zhejiang, Hangzhou Patentee after: Hangzhou Sunrise Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310030 West Lake science and Technology Park West eight road No. 2 Yinjiang Software Park building C Patentee before: Hangzhou Sunrise Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120111 |