CN205280807U - Circuit arrangement with electrification of ground wire detects function - Google Patents
Circuit arrangement with electrification of ground wire detects function Download PDFInfo
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- CN205280807U CN205280807U CN201520951389.8U CN201520951389U CN205280807U CN 205280807 U CN205280807 U CN 205280807U CN 201520951389 U CN201520951389 U CN 201520951389U CN 205280807 U CN205280807 U CN 205280807U
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Abstract
The utility model provides a circuit arrangement with electrification of ground wire detects function, the device comprises a power circuit, level signal control circuit and high -low level switching circuit, be by the earth (E line) when having the voltage difference between the zero line and be greater than more than the 50VAC, voltage extremely triggers with the G of the 3rd current -limiting resistor (R3) tandem connection to silicon controlled rectifier (SCR) through the 5th electric capacity (C5), the silicon controlled rectifier (SCR) switch on, the OUT port is exported by switching diode (D2) to the cluster again, make the OUT port be the high level state to the level state on power ground (GND) by low level conversion. Owing to adopt such structure, the third electric capacity C3 parts of detection circuitry the 5th an electric capacity C5, the 3rd current -limiting resistor R3 and filtering are few, and the level switching circuit comprises the third electric capacity C3 of silicon controlled rectifier SCR, switching diode D2, second electric capacity C2 and filtering, so the utility model discloses the part is few, and simple structure is with low costs.
Description
Technical field
The present invention relates to the earth wire charged testing device of a kind of household electrical appliance.
Background technology
Currently available technology, a kind of circuit assembly with ground wire electrification detection function it comprise power source circuit, level signal pilot circuit and height level switching circuit. Existing problems are: complex structure, cost height, and assembling is inconvenient.
Summary of the invention
It is an object of the invention to: provide a kind of circuit assembly with ground wire electrification detection function, it is simple that it has structure, the feature that cost is low and easy to assembly.
The present invention is achieved in that a kind of circuit assembly with ground wire electrification detection function, it is characterised in that: it comprises power source circuit, level signal pilot circuit and height level switching circuit,
Described power source circuit receives zero line through Zener diode ZD1 by phase line after rectification diode D1 and the first current limliting resistance R1 contacts, and the power supply after voltage stabilizing meets power supply ground GND by first electrical condenser C1 one end pin, the other end pin meets power vd D and power supply is carried out filtering;
Described level signal pilot circuit meets power vd D by the 2nd current limliting resistance R2 one end pin, the other end pin is connected with the A pole of controllable silicon SCR, the K pole of controllable silicon SCR is connected with one end pin of the 3rd electric capacity C3 of filtering, and the 3rd electric capacity C3 the other end pin of filtering meets power supply ground GND;
Height level switching circuit: be the G pole that the 5th electric capacity C5 closed through lotus root by the earth E line and the 3rd current limliting resistance R3 is connected to controllable silicon SCR, one end pin of the 4th electric capacity C4 made an uproar by parallel connection filter is connected with the G pole of controllable silicon SCR, the other end pin of the 4th electric capacity C4 that filter is made an uproar and power supply GND be connected and carry out the filter to controllable silicon SCR and make an uproar anti-interference, it is connected to by the A pole of switching diode D2 between the K pole of controllable silicon SCR and the 3rd electric capacity C3 of filtering again and carries out level signal detection output, 2nd electric capacity C2 be and be connected in output port OUT and power supply ground GND between filter capacitor,
Be by the earth E line relative to exist between zero line voltage difference be greater than more than 50VAC time, the G pole that voltage is connected to controllable silicon SCR through the 5th electric capacity C5 and the 3rd current limliting resistance R3 is triggered, controllable silicon SCR conducting, go here and there again and output to OUT terminal mouth by switching diode D2 so that the level state of power supply ground GND is high level state by low transition by OUT terminal mouth.
Described a kind of circuit assembly with ground wire electrification detection function, its special character is: also comprise the 2nd Zener diode ZD2, and the 4th electric capacity C4 that the 2nd Zener diode ZD and described filter are made an uproar is in parallel.
A kind of circuit assembly with ground wire electrification detection function of the present invention, owing to adopting such structure, 3rd electric capacity C3 parts of detection circuit the 5th electric capacity C5, the 3rd current limliting resistance R3 and filtering are few, level switching circuit is made up of the 3rd electric capacity C3 of controllable silicon SCR, switching diode D2, the 2nd electric capacity C2 and filtering, therefore parts of the present invention are few, structure is simple, and cost is low.
Accompanying drawing explanation
Fig. 1 is schematic circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As shown in Figure 1, a kind of circuit assembly with ground wire electrification detection function, it is characterised in that: it comprises power source circuit, level signal pilot circuit and height level switching circuit,
Described power source circuit receives zero line N through Zener diode ZD1 by phase line L after rectification diode D1 and the first current limliting resistance R1 contacts, and the power supply after voltage stabilizing meets power supply ground GND by first electrical condenser C1 one end pin, the other end pin meets power vd D and power supply is carried out filtering;
Described level signal pilot circuit meets power vd D by the 2nd current limliting resistance R2 one end pin, the other end pin is connected with the A pole of controllable silicon SCR, the K pole of controllable silicon SCR is connected with one end pin of the 3rd electric capacity C3 of filtering, and the 3rd electric capacity C3 the other end pin of filtering meets power supply ground GND;
Height level switching circuit: be the G pole that the 5th electric capacity C5 closed through lotus root by geodesic line E and the 3rd current limliting resistance R3 is connected to controllable silicon SCR, one end pin of the 4th electric capacity C4 made an uproar by parallel connection filter is connected with the G pole of controllable silicon SCR, the other end pin of the 4th electric capacity C4 that filter is made an uproar and power supply GND be connected and carry out the filter to controllable silicon SCR and make an uproar anti-interference, it is connected to by the A pole of switching diode D2 between the K pole of controllable silicon SCR and the 3rd electric capacity C3 of filtering again and carries out level signal detection output, 2nd electric capacity C2 be and be connected in output port OUT and power supply ground GND between filter capacitor,
Be by the earth E line relative to exist between zero line N voltage difference be greater than more than 50VAC time, the G pole that voltage is connected to controllable silicon SCR through the 5th electric capacity C5 and the 3rd current limliting resistance R3 is triggered, controllable silicon SCR conducting, go here and there again and output to OUT terminal mouth by switching diode D2 so that the level state of power supply ground GND is high level state by low transition by OUT terminal mouth.
As further improvement:: also comprising the 2nd Zener diode ZD2, the 4th electric capacity C4 that the 2nd Zener diode ZD and described filter are made an uproar is in parallel.
During use, the level state of this output terminal OUT can realize sound and light alarm and switch of cutting off the electricity supply through micro-chip process simultaneously, it is possible to avoids electric leakage injures and deaths more in time.
Above-described is only the preferred embodiments of the present invention. , it is also possible to make some improvement and modification, it should be appreciated that for the person of ordinary skill of the art, without departing from the principles of the present invention this is also considered as protection scope of the present invention.
Claims (2)
1. one kind has the circuit assembly of ground wire electrification detection function, it is characterised in that: it comprises power source circuit, level signal pilot circuit and height level switching circuit,
Described power source circuit receives zero line through Zener diode (ZD1) by phase line after rectification diode (D1) and the first current limliting resistance (R1) are contacted, and by the first electrical condenser (C1) one end pin, (GND), the other end pin connect power supply (VDD) and power supply is carried out filtering the power supply after voltage stabilizing with connecing power supply;
Described level signal pilot circuit connects power supply (VDD) by the 2nd current limliting resistance (R2) one end pin, the other end pin is connected with the A pole of silicon controlled rectifier (SCR), the K pole of silicon controlled rectifier (SCR) is connected with one end pin of the 3rd electric capacity (C3) of filtering, and the 3rd electric capacity (C3) the other end pin of filtering is with connecing power supply (GND);
Height level switching circuit: be the G pole that the 5th electric capacity (C5) closed through lotus root by geodesic line (E) and the 3rd current limliting resistance (R3) are connected to silicon controlled rectifier (SCR), one end pin of the 4th electric capacity (C4) made an uproar by parallel connection filter is connected with the G pole of silicon controlled rectifier (SCR), the other end pin of the 4th electric capacity (C4) that filter is made an uproar and power supply (GND) be connected and carry out the filter to silicon controlled rectifier (SCR) and make an uproar anti-interference, it is connected to by the A pole of switching diode (D2) between the K pole of silicon controlled rectifier (SCR) and the 3rd electric capacity (C3) of filtering again and carries out level signal detection output, 2nd electric capacity (C2) be and be connected in output port (OUT) and power supply ground (GND) between filter capacitor,
Be by geodesic line (E) relative to exist between zero line voltage difference be greater than more than 50VAC time, the G pole that voltage is connected to silicon controlled rectifier (SCR) through the 5th electric capacity (C5) and the 3rd current limliting resistance (R3) is triggered, silicon controlled rectifier (SCR) conducting, go here and there again and output to OUT terminal mouth by switching diode (D2) so that OUT terminal mouth to power supply the level state of (GND) be high level state by low transition.
2. a kind of circuit assembly with ground wire electrification detection function according to claim 1, it is characterised in that: also comprising the 2nd Zener diode (ZD2), the 4th electric capacity (C4) that the 2nd Zener diode (ZD2) and described filter are made an uproar is in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520951389.8U CN205280807U (en) | 2015-11-25 | 2015-11-25 | Circuit arrangement with electrification of ground wire detects function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520951389.8U CN205280807U (en) | 2015-11-25 | 2015-11-25 | Circuit arrangement with electrification of ground wire detects function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205280807U true CN205280807U (en) | 2016-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520951389.8U Withdrawn - After Issue CN205280807U (en) | 2015-11-25 | 2015-11-25 | Circuit arrangement with electrification of ground wire detects function |
Country Status (1)
| Country | Link |
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| CN (1) | CN205280807U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403756A (en) * | 2015-11-25 | 2016-03-16 | 佛山市顺德区澳骏电子科技有限公司 | Circuit device having ground wire live detection function |
-
2015
- 2015-11-25 CN CN201520951389.8U patent/CN205280807U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403756A (en) * | 2015-11-25 | 2016-03-16 | 佛山市顺德区澳骏电子科技有限公司 | Circuit device having ground wire live detection function |
| CN105403756B (en) * | 2015-11-25 | 2018-01-26 | 佛山市顺德区澳骏电子科技有限公司 | A kind of circuit arrangement with ground wire electrification detection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160601 Effective date of abandoning: 20180126 |