CN205539381U - Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts - Google Patents
Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts Download PDFInfo
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- CN205539381U CN205539381U CN201620261584.2U CN201620261584U CN205539381U CN 205539381 U CN205539381 U CN 205539381U CN 201620261584 U CN201620261584 U CN 201620261584U CN 205539381 U CN205539381 U CN 205539381U
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Abstract
The utility model provides an under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts, including opening and shutting floodgate detection circuitry unit, the floodgate detection circuitry unit that opens and shuts is equipped with optical coupler, and optical coupler's the first diode of input reverse parallel connection still includes the under -voltage false retrieval circuit unit that prevents, under -voltagely prevent that false retrieval circuit unit is equipped with the triode, the negative pole of second diode is connected to the base of triode, and the anodal of second diode is connected optical coupler's output, the grounded collector of triode, the projecting pole of triode is drawn forth and is detected the level output end, and when the operating voltage of relay was less than 220V and is in the undervoltage state promptly, this detection circuitry can correctly detect the operating position that draws of relay, avoids appearing the erroneous judgement, and it is more reliable that the relay of messenger's electric energy meter opens and shuts the floodgate testing result.
Description
Technical field
This utility model relates to the relay field of a kind of electric energy meter, particularly relates to the relay switching on testing circuit of a kind of under-voltage anti-flase drop.
Background technology
Along with developing rapidly of electric energy meter industry, the technology of the built-in relay of electric energy meter requires more and more higher, the built-in relay of electric energy meter has operates a switch and closing function, operate a switch and close a floodgate correspondence testing circuit, existing switching on testing circuit is as shown in Figure 1, when relay closes a floodgate, live wire and common port are linked to be the loop of a Guan Bi, voltage between live wire and common port is 220V, photo-coupler OC is operated in conducting state, detection level output end OUT1 output low level, this low level make the micro-control unit in electric energy meter detect relay be close a floodgate；When relay is operated a switch, the line of common port is pulled off, common port is in vacant state, now there is no voltage between live wire and common port, photo-coupler OC is operated in not on-state, detection level output end OUT1 exports high level, and this high level makes the micro-control unit in electric energy meter detect that relay is operated a switch.
But, when relay closes a floodgate, and the undertension 220V (as less than the 70% of normal voltage or lower) between live wire and common port, i.e. it is in under-voltage condition, now there is certain voltage between live wire and common port but be not enough to make photo-coupler OC sufficiently conductive, if now photo-coupler OC output voltage is more than 0.4V, then detection level output end OUT1 output high level is (when photo-coupler output voltage is less than 0.4V, detection level is output as low level), this high level makes the micro-control unit MCU in electric energy meter detect that relay is operated a switch, erroneous judgement occurs then.
Utility model content
This utility model provides the relay switching on testing circuit of a kind of under-voltage anti-flase drop, solve the technical problem that and be: when the running voltage of the built-in relay of electric energy meter is less than 220V (as less than the 70% of normal voltage or lower), this testing circuit can correctly detect the switching on state of relay, and the safety coefficient making electric energy meter is higher.
In order to solve above-mentioned technical problem, technical solution adopted in the utility model is:
The relay switching on testing circuit of a kind of under-voltage anti-flase drop is provided, including switching testing circuit unit, described switching testing circuit unit is provided with photo-coupler, input reverse parallel connection first diode of photo-coupler, first Diode series dropping resistor module, the outfan of photo-coupler is in parallel with electric capacity, ground connection other end the first divider resistance of connecting in described electric capacity one end is followed by power supply, also include under-voltage anti-flase drop circuit unit, described under-voltage anti-flase drop circuit unit is provided with audion, the base stage of audion connects the negative pole of the second diode, the positive pole of the second diode connects the outfan of described photo-coupler, the grounded collector of audion, the emitter stage of audion the second divider resistance of connecting is followed by power supply, the emitter stage of described audion draws detection level output end OUT2.
Further, described dropping resistor module is the dropping resistor of four series connection, described dropping resistor module is connected with live wire by relay, the positive pole of described first diode connects public terminal GND, or, the positive pole of described first diode is connected with live wire by relay, and described dropping resistor module connects public terminal GND.
Further, described audion is NPN type triode, and the model of described audion is 8050.
The relay switching on testing circuit of a kind of under-voltage anti-flase drop that this utility model provides is compared with prior art, when the running voltage of relay is less than 220V (as less than the 70% of normal voltage or lower), when being i.e. in under-voltage condition, this testing circuit can correctly detect the switching on state of relay, not havinging erroneous judgement, the relay switching testing result making electric energy meter is more reliable.
Accompanying drawing explanation
Fig. 1 is the switching on testing circuit schematic diagram of existing electrical energy meter relay；
Fig. 2 is the relay switching on testing circuit schematic diagram of a kind of under-voltage anti-flase drop that this utility model provides.
Detailed description of the invention
The most specifically illustrating embodiment of the present utility model, accompanying drawing is only for reference and explanation uses, and does not constitute the restriction to this utility model scope of patent protection.
nullAs shown in Figure 2，Embodiment of the present utility model relates to the relay switching on testing circuit of a kind of under-voltage anti-flase drop，Including switching testing circuit unit 1，Described switching testing circuit unit 1 is provided with photo-coupler OC，Input AK reverse parallel connection the first diode D1 of photo-coupler，First diode D1 series connection dropping resistor module，The outfan CE of photo-coupler is in parallel with electric capacity C1，Ground connection other end first divider resistance R5 that connects in described electric capacity C1 one end is followed by power supply，Also include under-voltage anti-flase drop circuit unit 2，Described under-voltage anti-flase drop circuit unit is provided with audion Q，The base stage of audion Q connects the negative pole of the second diode D2，The positive pole of the second diode D2 connects the outfan C of described photo-coupler，The grounded collector of audion Q，The emitter stage of the audion Q second divider resistance R6 that connects is followed by power supply，The emitter stage of described audion Q draws detection level output end OUT2.
Described dropping resistor module is dropping resistor R1～R4 of four series connection, described dropping resistor module is connected with live wire by relay, the positive pole of described first diode D1 connects public terminal GND, or, in other embodiments, the positive pole of described first diode is connected with live wire by relay, and described dropping resistor module connects common port.
Described audion Q can be NPN type triode, and the model of described audion Q can be 8050.
In the present embodiment, R1～R4 resistance is 200K, and the first divider resistance R5 is 100K, and the second divider resistance R6 is 10K, and electric capacity C1 is 0.1uF.
The work process of the relay switching on testing circuit of under-voltage anti-flase drop of the present utility model is:
(1) when relay working voltage is normal:
When relay closes a floodgate, live wire and public terminal GND are linked to be the loop of a Guan Bi, voltage between live wire and public terminal GND is 220V, photo-coupler OC is operated in conducting state, NPN type triode Q is ended, detection level output end OUT2 export high level, this high level make the micro-control unit in electric energy meter detect relay be close a floodgate；When relay is operated a switch, the line of common port is pulled off, common port is in vacant state, now there is no voltage between live wire and common port, photo-coupler OC is operated in not on-state, NPN type triode Q turns on, and detects level output end OUT2 output low level, and this low level makes the micro-control unit MCU in electric energy meter detect that relay is operated a switch.
(2) when relay is operated in under-voltage condition:
When relay closes a floodgate, undertension 220V (as less than the 70% of normal voltage or lower) between live wire and common port, i.e. it is in under-voltage condition, now there is certain voltage between live wire and common port but be not enough to make photo-coupler OC sufficiently conductive, if now photo-coupler CE end output voltage is less than 1.2V more than 0.4V, NPN type triode Q cut-off (triode ON to be made, the outfan CE output voltage of photo-coupler OC is at least above 1.2V, so the gate value voltage of erroneous judgement has brought up to 1.2V from 0.4V), then detection level output end OUT2 is output as high level, this high level makes the micro-control unit MCU in electric energy meter detect, and relay is to close a floodgate, the most correct has judged that under under-voltage condition, relay is operated a switch or "on" position.
Above disclosed only preferred embodiment of the present utility model, it is impossible to limit rights protection scope of the present utility model, the equivalent variations therefore made according to this utility model claim with this, still belong to the scope that this utility model is contained.
Claims (4)
1. a relay switching testing circuit for under-voltage anti-flase drop, including switching testing circuit list
Unit, described switching testing circuit unit is provided with photo-coupler, and the input of photo-coupler is reverse
First diode in parallel, the first Diode series dropping resistor module, the outfan of photo-coupler
In parallel with electric capacity, ground connection other end the first divider resistance of connecting in described electric capacity one end is followed by power supply,
It is characterized in that: also include under-voltage anti-flase drop circuit unit, described under-voltage anti-flase drop circuit unit
Being provided with audion, the base stage of audion connects the negative pole of the second diode, and the second diode is just
Pole connects the outfan of described photo-coupler, the grounded collector of audion, the transmitting of audion
Pole the second divider resistance of connecting is followed by power supply, and it is defeated that the emitter stage of described audion draws detection level
Go out end.
The relay switching testing circuit of a kind of under-voltage anti-flase drop the most according to claim 1, its
It is characterised by: described dropping resistor module is the dropping resistor of four series connection, described dropping resistor
Module is connected with live wire by relay, and the positive pole of described first diode connects common port, or,
The positive pole of described first diode is connected with live wire by relay, and described dropping resistor module connects
Common port.
The relay switching testing circuit of a kind of under-voltage anti-flase drop the most according to claim 1, its
It is characterised by: described audion is NPN type triode.
The relay switching testing circuit of a kind of under-voltage anti-flase drop the most according to claim 1, its
It is characterised by: the model of described audion is 8050.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620261584.2U CN205539381U (en) | 2016-03-31 | 2016-03-31 | Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620261584.2U CN205539381U (en) | 2016-03-31 | 2016-03-31 | Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539381U true CN205539381U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620261584.2U Expired - Fee Related CN205539381U (en) | 2016-03-31 | 2016-03-31 | Under -voltage relay of preventing false retrieval floodgate detection circuitry that opens and shuts |
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| CN (1) | CN205539381U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703447A (en) * | 2017-10-23 | 2018-02-16 | 风度（常州）汽车研发院有限公司 | Condition checkout gear and dynamical system |
| 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 |
| CN109031107A (en) * | 2018-07-13 | 2018-12-18 | 浙江英洛华新能源科技有限公司 | Detect the electron assistant contact circuit of high-voltage relay contact on-off |
| 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 |
| CN113078026A (en) * | 2021-04-16 | 2021-07-06 | 上海宏英智能科技股份有限公司 | Relay port detection circuit |
| CN115407193A (en) * | 2022-11-01 | 2022-11-29 | 安徽南瑞中天电力电子有限公司 | Terminal detection circuit and method for judging whether power grid system is connected with breaker or not |
-
2016
- 2016-03-31 CN CN201620261584.2U patent/CN205539381U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107703447A (en) * | 2017-10-23 | 2018-02-16 | 风度（常州）汽车研发院有限公司 | Condition checkout gear and dynamical system |
| 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 |
| CN109031107A (en) * | 2018-07-13 | 2018-12-18 | 浙江英洛华新能源科技有限公司 | Detect the electron assistant contact circuit of high-voltage relay contact on-off |
| CN109031107B (en) * | 2018-07-13 | 2023-10-03 | 浙江英洛华新能源科技有限公司 | Electronic auxiliary contact circuit for detecting on-off of high-voltage relay contact |
| 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 |
| CN113078026A (en) * | 2021-04-16 | 2021-07-06 | 上海宏英智能科技股份有限公司 | Relay port detection circuit |
| CN115407193A (en) * | 2022-11-01 | 2022-11-29 | 安徽南瑞中天电力电子有限公司 | Terminal detection circuit and method for judging whether power grid system is connected with breaker or not |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 |