CN102253334A - Circuit for detecting open and close states of relay for electric energy meter - Google Patents
Circuit for detecting open and close states of relay for electric energy meter Download PDFInfo
- Publication number
- CN102253334A CN102253334A CN2011101610345A CN201110161034A CN102253334A CN 102253334 A CN102253334 A CN 102253334A CN 2011101610345 A CN2011101610345 A CN 2011101610345A CN 201110161034 A CN201110161034 A CN 201110161034A CN 102253334 A CN102253334 A CN 102253334A
- Authority
- CN
- China
- Prior art keywords
- relay
- diode
- live wire
- working power
- electric energy
- 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.)
- Pending
Links
Images
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention provides a circuit for detecting open and close states of a relay for an electric energy meter. The circuit comprises a voltage reduction module, a diode connected with the voltage reduction module in series, an optical coupler and a working power supply, wherein the diode is reversely connected with the input end of the optical coupler in parallel; the output end of the optical coupler is connected with a capacitor in parallel; the working power supply is loaded at the two ends of the capacitor; a bleeder resistor is arranged between the working power supply and the capacitor; the positive terminal of the diode is connected with a live wire by the relay; when the relay is in the open state, the positive terminal of the diode is disconnected with the live wire; and when the relay is in the close state, the positive terminal of the diode is connected with the live wire. The circuit can conveniently and reliably detect the open and close states of the relay, is simple and has low cost.
Description
Technical field
The present invention relates to a kind of electric energy meter 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.By 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 order of drawing lock, 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 step-down module diode in series, photo-coupler, and working power with relay folding lock testing circuit;
The input end reverse parallel connection of described diode and photo-coupler, the output terminal of described photo-coupler is in parallel 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 by relay, and when relay is in when operating a switch state, the forward end of diode and live wire disconnect; 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.
Technical conceive of the present invention 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 present invention can make things convenient for, the drawing lock state of reliable detection relay, and circuit is simple, and with low cost.
Description of drawings
Fig. 1 is a circuit diagram of the present invention.
Embodiment
With reference to accompanying drawing, further specify the present invention:
Electric energy meter comprises the step-down module, with step-down module diode in series D1, photo-coupler O1, and working power with relay folding lock testing circuit;
The input end reverse parallel connection of described diode D1 and photo-coupler O1, the output terminal of described photo-coupler O1 is in parallel 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 by relay, and when relay L is in when operating a switch state, the forward end of diode D1 and live wire L disconnect; 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.
Technical conceive of the present invention is: form the step-down module by resistance R 1～R4 step-down with low cost, and utilize one 4148 diode D1 oppositely in parallel with the input end of optocoupler O1, make the proud conducting of alternating voltage.Described transport module then is the signal that will be similar to square wave by 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 disconnect, 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 that the present invention has circuit, reliability height, advantage with low cost.
The described content of this instructions embodiment only is enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (2)
1. electric energy meter is characterized in that: comprise the step-down module, with step-down module diode in series, photo-coupler, and working power with relay folding lock testing circuit;
The input end reverse parallel connection of described diode and photo-coupler, the output terminal of described photo-coupler is in parallel 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 by relay, and when relay is in when operating a switch state, the forward end of diode and live wire disconnect; 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 relay folding lock testing circuit, it is characterized in that: described step-down module is made up of the resistance of four series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101610345A CN102253334A (en) | 2011-06-15 | 2011-06-15 | Circuit for detecting open and close states of relay for electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101610345A CN102253334A (en) | 2011-06-15 | 2011-06-15 | Circuit for detecting open and close states of relay for electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102253334A true CN102253334A (en) | 2011-11-23 |
Family
ID=44980704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101610345A Pending CN102253334A (en) | 2011-06-15 | 2011-06-15 | Circuit for detecting open and close states of relay for electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102253334A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926530A (en) * | 2014-04-08 | 2014-07-16 | 中国计量学院 | Isolated detection circuit for states of relays inside scanning switch |
| CN106501716A (en) * | 2016-12-19 | 2017-03-15 | 宁波三星医疗电气股份有限公司 | The single-phase electric meter air switch signal deteching circuit that is sampled based on resistance terminal and method |
| CN107202955A (en) * | 2017-07-27 | 2017-09-26 | 大力电工襄阳股份有限公司 | A kind of vacuum contactor on/off switch state indirect detection devices and methods therefor |
| 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 |
| CN109921379A (en) * | 2019-03-07 | 2019-06-21 | 宁波三星医疗电气股份有限公司 | A kind of electric energy meter switching on feed circuit and switching on circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086419U (en) * | 1991-01-24 | 1991-10-09 | 朱少武 | Anti-jointing switch with ground wire checking unit |
| CN2239032Y (en) * | 1995-11-03 | 1996-10-30 | 屠锡瑜 | Flash relay |
| CN201113782Y (en) * | 2007-10-26 | 2008-09-10 | 深圳和而泰智能控制股份有限公司 | Zero-cross detection circuit for switch power circuit |
| CN101598749A (en) * | 2009-06-26 | 2009-12-09 | 中兴通讯股份有限公司 | Three-phase does not have the center line alternating current zero crossing detection device |
| CN201955391U (en) * | 2011-02-22 | 2011-08-31 | 武汉盛帆电子股份有限公司 | Relay feedback detecting circuit for single-phase cost-control intelligent electric energy meter |
| CN202110215U (en) * | 2011-06-15 | 2012-01-11 | 杭州炬华科技股份有限公司 | Switching detection circuit of relay for electric energy meter |
-
2011
- 2011-06-15 CN CN2011101610345A patent/CN102253334A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086419U (en) * | 1991-01-24 | 1991-10-09 | 朱少武 | Anti-jointing switch with ground wire checking unit |
| CN2239032Y (en) * | 1995-11-03 | 1996-10-30 | 屠锡瑜 | Flash relay |
| CN201113782Y (en) * | 2007-10-26 | 2008-09-10 | 深圳和而泰智能控制股份有限公司 | Zero-cross detection circuit for switch power circuit |
| CN101598749A (en) * | 2009-06-26 | 2009-12-09 | 中兴通讯股份有限公司 | Three-phase does not have the center line alternating current zero crossing detection device |
| CN201955391U (en) * | 2011-02-22 | 2011-08-31 | 武汉盛帆电子股份有限公司 | Relay feedback detecting circuit for single-phase cost-control intelligent electric energy meter |
| CN202110215U (en) * | 2011-06-15 | 2012-01-11 | 杭州炬华科技股份有限公司 | Switching detection circuit of relay for electric energy meter |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926530A (en) * | 2014-04-08 | 2014-07-16 | 中国计量学院 | Isolated detection circuit for states of relays inside scanning switch |
| CN106501716A (en) * | 2016-12-19 | 2017-03-15 | 宁波三星医疗电气股份有限公司 | The single-phase electric meter air switch signal deteching circuit that is sampled based on resistance terminal and method |
| CN106501716B (en) * | 2016-12-19 | 2020-08-18 | 宁波三星医疗电气股份有限公司 | Single-phase electric meter open signal detection circuit and method based on resistance end sampling |
| CN107202955A (en) * | 2017-07-27 | 2017-09-26 | 大力电工襄阳股份有限公司 | A kind of vacuum contactor on/off switch state indirect detection devices and methods therefor |
| CN107202955B (en) * | 2017-07-27 | 2023-07-25 | 大力电工襄阳股份有限公司 | Device and method for indirectly detecting on-off state of vacuum contactor |
| 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 |
| CN109921379A (en) * | 2019-03-07 | 2019-06-21 | 宁波三星医疗电气股份有限公司 | A kind of electric energy meter switching on feed circuit and switching on circuit |
| CN109921379B (en) * | 2019-03-07 | 2021-03-02 | 宁波三星医疗电气股份有限公司 | Electric energy meter switching-on and switching-off feedback circuit and switching-on and switching-off circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102253334A (en) | Circuit for detecting open and close states of relay for electric energy meter | |
| CN201724975U (en) | Brown out detection circuit of electric meter system | |
| CN202110215U (en) | Switching detection circuit of relay for electric energy meter | |
| CN202770920U (en) | Alternating current vacuum contactor adhesion detection device | |
| CN103852674A (en) | Residual current transformer secondary coil disconnection detection circuit | |
| CN202111462U (en) | Phase-failure and phase-discrimination detection and protection device of motor | |
| CN103138025B (en) | Electric leakage detection circuit and battery system | |
| CN203275598U (en) | Relay open circuit detection apparatus used for dedicated transformer collection terminal | |
| CN103308755B (en) | The insulation detection device of high voltage direct current remote electric power system and method | |
| CN203204062U (en) | Comparator-based voltage signal detection circuit | |
| CN202548267U (en) | Circuit for detecting live wire and zero wire | |
| CN203745553U (en) | Phase sequence detection circuit of three-phase power supply | |
| CN202159956U (en) | Three-phase electricity detection controller | |
| CN202929127U (en) | Circuit for detecting three-phase electricity phase sequence and open phase | |
| CN203688642U (en) | Power failure detection circuit | |
| CN203799966U (en) | Signal acquisition circuit structure of relay anti-abrupt change impact protection system | |
| CN202678217U (en) | Magnetic latching relay drive circuit | |
| CN203572900U (en) | Broken line detection circuit for state grid special transformer collection terminal control circuit | |
| CN201868333U (en) | Relay control circuit with current detection function | |
| CN204287447U (en) | A kind of alternating current-direct current input detecting circuit | |
| CN103852676A (en) | Passive contact detection device and method | |
| CN203337786U (en) | An electric energy meter load switch detecting circuit | |
| CN204374286U (en) | A kind of power supply input overvoltage/undervoltage testing circuit and starting-up later time thereof | |
| CN204330873U (en) | A kind ofly gather on single live wire and be detected the circuit at zero point | |
| CN204031026U (en) | A kind of ECM motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111123 |