CN202770937U - Novel leakage alarm circuit - Google Patents
Novel leakage alarm circuit Download PDFInfo
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- CN202770937U CN202770937U CN 201220120753 CN201220120753U CN202770937U CN 202770937 U CN202770937 U CN 202770937U CN 201220120753 CN201220120753 CN 201220120753 CN 201220120753 U CN201220120753 U CN 201220120753U CN 202770937 U CN202770937 U CN 202770937U
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- triode
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Abstract
The utility model provides a novel leakage alarm circuit and relates to the technical field of electronic circuits. A phase line on one end of a 220V AC power supply is connected with an end of a socket (SZ) and one end of a second resistor (R2). A grounding terminal of the socket (SZ) is connected with one end of a first resistor (R1). The other end of the first resistor (R1) is connected with a base electrode of a triode (VT1). A collector electrode of the triode (VT1) is connected with a first pin of an integrated chip (CW-9300), a positive electrode of a capacitor (C1) and a negative electrode of a diode (VD1). A positive electrode of the diode (VD1) is connected with the other end of the second resistor (R2). A negative electrode of the capacitor (C1) is connected with the other end of the 220V AC power supply. An emitting electrode of the triode (VT1) is connected with a second pin of the integrated chip (CW-9300). A third pin of the integrated chip (CW-9300) is connected with the other end of the 220V AC power supply. An eighth pin of the integrated chip (CW-9300) is connected with a seventh pin of the integrated chip (CW-9300) through a third resistor (R3). The novel leakage alarm circuit is high in alarm sensibility. And not only is the alarm volume large, but also a defect that the circuit volume changes along with the size of the leakage current is made up.
Description
Technical field:
The utility model relates to the electronic circuit technology field, is specifically related to a kind of novel leakage-current alarm circuit.
Background technology:
Present civilian Power supply line is comprised of phase line and zero line, and because the ground wire of house is inconvenient, thereby make many electric equipments lack necessary ground wire, phase line voltage on household electrical appliance housing band, the electric shock casualty accident just occurs inevitably, and the attaching plug of selling on the existing market does not have warning function to electrical leakage during work, and this brings a lot of inconvenience to people in real life.
The utility model content:
The purpose of this utility model provides a kind of novel leakage-current alarm circuit, and its warning sensitivity is high, and not only reporting to the police gives great volume, and has overcome the deficiency that the circuit volume changes with leakage current.
In order to solve the existing problem of background technology, the utility model is by the following technical solutions: it comprises socket SZ, the first resistance-second resistance R 1-R2, capacitor C 1, diode VD1, triode VT1, alarm YD and integrated chip CW-9300, the phase line of alternating current 220V one end respectively with the end of socket SZ be connected an end of resistance R 2 and be connected, the earth terminal of socket SZ is connected with an end of the first resistance R 1, the other end of the first resistance R 1 is connected with the base stage of triode VT1, the collector of triode VT1 respectively with 1 pin of integrated chip CW-9300, the positive pole of capacitor C 1 is connected negative pole and is connected with diode VD1, the positive pole of diode VD1 is connected with the other end of the second resistance R 2, the negative pole of capacitor C 1 is connected with the other end of alternating current 220V, the emitter of triode VT1 is connected with 2 pin of integrated chip CW-9300,3 pin of integrated chip CW-9300 be connected with the other end with alternating current 220V by alarm YD, 8 pin of integrated chip CW-9300 are connected with its 7 pin by the 3rd resistance R 3.
Principle of work of the present utility model: consist of highly sensitive trigger circuit by the first resistance R 1 and triode VT1, its leakage alarm electric current is less than 10uA.Its alarm YD operating voltage is supplied with after by 2 step-downs of the second resistance R, diode VD1 rectification, capacitor C 1 filtering.
The utility model warning sensitivity is high, and not only reporting to the police gives great volume, and has overcome the deficiency that the circuit volume changes with leakage current.
Description of drawings:
Fig. 1 is structural representation of the present utility model.
Embodiment:
With reference to Fig. 1, this embodiment is by the following technical solutions: it comprises socket SZ, the first resistance-second resistance R 1-R2, capacitor C 1, diode VD1, triode VT1, alarm YD and integrated chip CW-9300, the phase line of alternating current 220V one end respectively with the end of socket SZ be connected an end of resistance R 2 and be connected, the earth terminal of socket SZ is connected with an end of the first resistance R 1, the other end of the first resistance R 1 is connected with the base stage of triode VT1, the collector of triode VT1 respectively with 1 pin of integrated chip CW-9300, the positive pole of capacitor C 1 is connected negative pole and is connected with diode VD1, the positive pole of diode VD1 is connected with the other end of the second resistance R 2, the negative pole of capacitor C 1 is connected with the other end of alternating current 220V, the emitter of triode VT1 is connected with 2 pin of integrated chip CW-9300,3 pin of integrated chip CW-9300 be connected with the other end with alternating current 220V by alarm YD, 8 pin of integrated chip CW-9300 are connected with its 7 pin by the 3rd resistance R 3.
The principle of work of this embodiment: consist of highly sensitive trigger circuit by the first resistance R 1 and triode VT1, its leakage alarm electric current is less than 10uA.Its alarm YD operating voltage is supplied with after by 2 step-downs of the second resistance R, diode VD1 rectification, capacitor C 1 filtering.
This embodiment warning sensitivity is high, and not only reporting to the police gives great volume, and has overcome the deficiency that the circuit volume changes with leakage current.
Claims (1)
1. novel leakage-current alarm circuit, it is characterized in that it comprises socket (SZ), the first resistance-second resistance (R1-R2), electric capacity (C1), diode (VD1), triode (VT1), alarm (YD) and integrated chip (CW-9300), the phase line of alternating current 220V one end respectively with an end of socket (SZ) be connected an end of resistance (R2) and be connected, the earth terminal of socket (SZ) is connected with an end of the first resistance (R1), the other end of the first resistance (R1) is connected with the base stage of triode (VT1), the collector of triode (VT1) respectively with 1 pin of integrated chip (CW-9300), the positive pole of electric capacity (C1) is connected VD1 with diode) negative pole connect, the positive pole of diode (VD1) is connected with the other end of the second resistance (R2), the negative pole of electric capacity (C1) is connected with the other end of alternating current 220V, the emitter of triode (VT1) is connected with 2 pin of integrated chip (CW-9300), 3 pin of integrated chip (CW-9300) be connected with the other end with alternating current 220V by alarm (YD), 8 pin of integrated chip (CW-9300) are connected with its 7 pin by the 3rd resistance (R3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220120753 CN202770937U (en) | 2012-03-21 | 2012-03-21 | Novel leakage alarm circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220120753 CN202770937U (en) | 2012-03-21 | 2012-03-21 | Novel leakage alarm circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202770937U true CN202770937U (en) | 2013-03-06 |
Family
ID=47777501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220120753 Expired - Fee Related CN202770937U (en) | 2012-03-21 | 2012-03-21 | Novel leakage alarm circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202770937U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698649A (en) * | 2013-12-26 | 2014-04-02 | 吴建堂 | Commercial power leakage alarm device |
-
2012
- 2012-03-21 CN CN 201220120753 patent/CN202770937U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698649A (en) * | 2013-12-26 | 2014-04-02 | 吴建堂 | Commercial power leakage alarm device |
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Legal Events
| 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 |
Granted publication date: 20130306 Termination date: 20150321 |
|
| EXPY | Termination of patent right or utility model |