CN201781263U - Electric-shock protection wall overcurrent leakage protection circuit of wall switch - Google Patents
Electric-shock protection wall overcurrent leakage protection circuit of wall switch Download PDFInfo
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- CN201781263U CN201781263U CN2010201912897U CN201020191289U CN201781263U CN 201781263 U CN201781263 U CN 201781263U CN 2010201912897 U CN2010201912897 U CN 2010201912897U CN 201020191289 U CN201020191289 U CN 201020191289U CN 201781263 U CN201781263 U CN 201781263U
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- overcurrent
- protection circuit
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Abstract
The utility model relates to the field of electronic circuits, in particular to an electric-shock protection wall overcurrent leakage protection circuit in a wall switch, which has the technical scheme that: a live line and a zero line of alternating current are connected with a zero sequence current mutual inductor to be output to two amplification input ports of a leakage protection control chip, the control output end of the leakage protection control chip is connected with a silicon controlled control electrode, the live line of the alternating current is connected with an overcurrent mutual inductor, one output of the overcurrent mutual inductor is connected to the silicon controlled control electrode through a polar diode and a resistor which are serially connected, one path of an earth wire is serially connected with a plurality of divider resistors and diodes to the zero line, the divider resistors are connected to the silicon controlled control electrode through a resistor and a voltage-regulator tube which are serially connected, the controlled silicon is serially connected with a coil of an electrical apparatus release and then accessed into the live line, the electrical apparatus release is respectively serially connected to the live line and the zero line input wires of the alternating current, and the on and the off of the electrical apparatus release are controlled by the coil of the electrical apparatus release.
Description
Technical field
The utility model relates to electronic circuit field, relates in particular to the anti-electric wall overcurrent leakage protection circuit in the switch on wall.
Background technology
Switch on wall is electronic devices and components common in the daily life, lives inseparable with people.But existing switch on wall only for providing electrical equipment access and conducting to disconnect the usefulness of switching, lacks necessary electic protection, has potential safety hazard.If when running into short circuit, electric leakage, overcurrent, ground wire electrification or ground wire and disconnecting, damage load easily and the user caused personal injury, also cause electrical fire easily, cause any property loss.
The utility model content
At the problems referred to above, the utility model proposes a kind of anti-electric wall overcurrent leakage protection circuit of rational and effective switch on wall, can avoid electric hidden danger.
The technical solution of the utility model is:
The overcurrent leakage protection circuit of switch on wall of the present utility model is: the live wire of alternating current and zero line connect a zero sequence current mutual inductor; zero sequence current mutual inductor exports two of earth leakage protective control chip to and amplifies input port; the control output end of this earth leakage protective control chip is connected in a silicon controlled control utmost point; the live wire of alternating current connects one and crosses current transformer; cross current transformer one output connection and control the utmost point through the polarity diode and resistance to the described silicon controlled of serial connection; other end connecting to neutral line; a road of ground wire is connected in series a resistance to live wire; another road is connected in series a plurality of divider resistances and diode to zero line; resistance and voltage-stabiliser tube to silicon controlled by series connection between divider resistance are controlled the utmost point; insert on the above-mentioned live wire behind the coil of a release of described controllable silicon series connection; described release is serially connected with respectively on the live wire and zero line incoming line of alternating current, and controls break-make by the coil of release.
Further, described earth leakage protective control chip is the FM2140 chip.
Further, the input of described earth leakage protective control chip connects the zero sequence current mutual inductor secondary output end.
Further, the output of a zero sequence current mutual inductor resistance in parallel.
Further, also connect a piezo-resistance between described live wire and the zero line.
Further, described live wire is also connected polarity diode, current-limiting resistance and a light-emitting diode to zero line.
The utility model adopts as above technical scheme; by zero sequence current mutual inductor, cross the circuit that current transformer and earth leakage protective control chip and electric resistance partial pressure mode constitute; electric leakage and overcurrent and ground wire electrification etc. to alternating current carry out monitoring and protection; when phenomenons such as electric leakage, overcurrent, ground wire electrification or ground wire broken string occurring; disconnect the alternating current input channel by trip coil control release; avoid electric hidden danger, ensured the person and property safety.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Now with embodiment the utility model is further specified in conjunction with the accompanying drawings.
Consult shown in Figure 1; the anti-electric wall overcurrent leakage protection circuit of switch on wall of the present utility model is: the live wire L of alternating current and zero line N meet a zero sequence current mutual inductor ZCT1; zero sequence current mutual inductor ZCT1 exports two of earth leakage protective control chip IC1 to and amplifies input port; the control output end of this earth leakage protective control chip IC1 is connected in the control utmost point of a controllable silicon SCR 1; the live wire L of alternating current connects one and crosses current transformer ZCT2; crossing current transformer ZCT2 one output connects through the polarity diode of serial connection and the resistance control utmost point to described controllable silicon SCR 1; other end connecting to neutral line N; a road of ground wire E is connected in series a resistance R 11 to live wire L; another road is connected in series a plurality of divider resistance R12; R14; RT2 and diode are to zero line N; resistance R 15 by series connection between divider resistance and voltage-stabiliser tube D7 are to the control utmost point of controllable silicon SCR 1; insert on the above-mentioned live wire L behind the coil TK1 of a release of described controllable silicon SCR 1 series connection; described release K1 is serially connected with respectively on the live wire L and zero line N incoming line of alternating current, and controls break-make by the coil TK1 of release.Preferably, described earth leakage protective control chip IC1 is the FM2140 chip.The input of described earth leakage protective control chip IC1 connects the zero sequence current mutual inductor secondary output end.A described zero sequence current mutual inductor secondary output end resistance in parallel.Also connect a piezo-resistance between described live wire L and the zero line N.Described live wire L also connects polarity diode D1, a current-limiting resistance R2 and LED 1 to zero line N.Resistance R T1 wherein and resistance R T2 are debugging resistance, can regulate suitable resistance parameter.
The anti-electric wall overcurrent leakage protection circuit of switch on wall of the present utility model is normal at the protected circuit working of load, and the generation electric leakage or the person get an electric shock, rated current normally reaches in the good absence of ground connection the earth leakage protective device normal power supply.When load is leaked electricity; or the person is when getting an electric shock; ZCT1 level of zero sequence current mutual inductor has output voltage; when leakage current arrives certain value (for example 10mA) greatly; ZCT1 level of zero sequence current mutual inductor output AC voltage reaches certain numerical value; IC1 amplifies through the earth leakage protective control chip; compare and processing; trigger controllable silicon SCR 1 conducting; make the coil TK1 that is connected on the release between live wire L and the controllable silicon SCR 1 have big electric current to flow through, the iron core pulling dropout plate in the coil TK1 of release makes pull bar break away from the dropout plate; moving contact leaves fixed contact; this control release K1 is cut off the electricity supply, avoided casualties, reach earth leakage protective purpose.When load is transshipped, cross ZCT2 big voltage triggered controllable silicon SCR 1 of level output of current transformer, make the coil TK1 control release K1 of release, release moves, and cuts off the electricity supply, and prevents that power line from waiting cause thermal damage even causing fire.And, broken string charged as ground wire E or live wire L, zero line N connect inverse time, adopt the mode of electric resistance partial pressure to make controllable silicon SCR 1 conducting, and the release action is cut off the electricity supply.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection range of the present utility model.
Claims (6)
1. the anti-electric wall overcurrent leakage protection circuit of a switch on wall; it is characterized in that: live wire of alternating current (L) and zero line (N) connect a zero sequence current mutual inductor (ZCT1); zero sequence current mutual inductor (ZCT1) exports two of earth leakage protective control chip (IC1) to and amplifies input port; the control output end of this earth leakage protective control chip (IC1) is connected in the control utmost point of a controllable silicon (SCR1); the live wire of alternating current (L) connects one and crosses current transformer (ZCT2); crossing current transformer (ZCT2) an output connects through the polarity diode of serial connection and the resistance control utmost point to described controllable silicon (SCR1); other end connecting to neutral line (N); a road of ground wire (E) is connected in series a resistance (R11) to live wire (L); another road is connected in series a plurality of divider resistance (R12; R14; RT2) and diode to zero line (N); resistance (R15) by series connection between divider resistance and voltage-stabiliser tube (D7) are to the control utmost point of controllable silicon (SCR1); coil (TK1) back of a release of described controllable silicon (SCR1) series connection is inserted on the above-mentioned live wire (L); described release (K1) is serially connected with respectively on the live wire (L) and zero line (N) incoming line of alternating current, and controls break-make by the coil (TK1) of release.
2. the anti-electric wall overcurrent leakage protection circuit of switch on wall according to claim 1, it is characterized in that: described earth leakage protective control chip (IC1) is the FM2140 chip.
3. the anti-electric wall overcurrent leakage protection circuit of switch on wall according to claim 1 is characterized in that: input connection zero sequence current mutual inductor (ZCT1) secondary output end of described earth leakage protective control chip (IC1).
4. the anti-electric wall overcurrent leakage protection circuit of switch on wall according to claim 3 is characterized in that: a described secondary output end resistance (R7) in parallel.
5. the anti-electric wall overcurrent leakage protection circuit of switch on wall according to claim 1 is characterized in that: also connect a piezo-resistance (MOV) between described live wire (L) and the zero line (N).
6. the anti-electric wall overcurrent leakage protection circuit of switch on wall according to claim 1, it is characterized in that: described live wire (L) is also connected a polarity diode (D1), current-limiting resistance (R2) and light-emitting diode (LED1) to zero line (N).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201912897U CN201781263U (en) | 2010-05-10 | 2010-05-10 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201912897U CN201781263U (en) | 2010-05-10 | 2010-05-10 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201781263U true CN201781263U (en) | 2011-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201912897U Expired - Fee Related CN201781263U (en) | 2010-05-10 | 2010-05-10 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
Country Status (1)
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|---|---|
| CN (1) | CN201781263U (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354863A (en) * | 2011-06-23 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN102354946A (en) * | 2011-09-16 | 2012-02-15 | 中山凯韦电机有限公司 | Intelligent leakage protection switch |
| CN102364762A (en) * | 2011-08-09 | 2012-02-29 | 刘睿刚 | Leakage protection plug |
| CN102364763A (en) * | 2011-08-09 | 2012-02-29 | 刘睿刚 | Leakage protection plug |
| CN102684148A (en) * | 2012-05-30 | 2012-09-19 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN103378592A (en) * | 2012-04-20 | 2013-10-30 | 苏州益而益电器制造有限公司 | Abnormal-wiring surplus current protection device |
| CN103872643A (en) * | 2014-03-18 | 2014-06-18 | 广州市博达电子科技有限公司 | Anti electric wall circuit for leakage protection switch and application of the same |
| CN104917147A (en) * | 2015-05-25 | 2015-09-16 | 余姚市嘉荣电子电器有限公司 | EN voltage-dividing and sampling type leakage protector |
| CN105305377A (en) * | 2015-07-06 | 2016-02-03 | 钟兴明 | Single-phase multifunctional protector with low power consumption |
| CN105811367A (en) * | 2016-05-06 | 2016-07-27 | 广州市博达电子科技有限公司 | Electric leakage protection wall switch |
| CN107681629A (en) * | 2017-11-01 | 2018-02-09 | 乐清市诚富电器科技有限公司 | The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method |
-
2010
- 2010-05-10 CN CN2010201912897U patent/CN201781263U/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354863A (en) * | 2011-06-23 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN102354863B (en) * | 2011-06-23 | 2013-03-27 | 刘睿刚 | Electricity leakage protection plug |
| CN102364762A (en) * | 2011-08-09 | 2012-02-29 | 刘睿刚 | Leakage protection plug |
| CN102364763A (en) * | 2011-08-09 | 2012-02-29 | 刘睿刚 | Leakage protection plug |
| CN102354946A (en) * | 2011-09-16 | 2012-02-15 | 中山凯韦电机有限公司 | Intelligent leakage protection switch |
| CN103378592B (en) * | 2012-04-20 | 2016-10-05 | 苏州益而益电器制造有限公司 | The abnormal Aftercurrent protecting equipment of wiring |
| CN103378592A (en) * | 2012-04-20 | 2013-10-30 | 苏州益而益电器制造有限公司 | Abnormal-wiring surplus current protection device |
| CN102684148A (en) * | 2012-05-30 | 2012-09-19 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN102684148B (en) * | 2012-05-30 | 2014-06-04 | 常熟市立得电器有限公司 | Leakage protection device with extended function |
| CN103872643A (en) * | 2014-03-18 | 2014-06-18 | 广州市博达电子科技有限公司 | Anti electric wall circuit for leakage protection switch and application of the same |
| CN103872643B (en) * | 2014-03-18 | 2017-04-19 | 广州市博达电子科技有限公司 | Anti electric wall circuit for leakage protection switch and application of the same |
| CN104917147A (en) * | 2015-05-25 | 2015-09-16 | 余姚市嘉荣电子电器有限公司 | EN voltage-dividing and sampling type leakage protector |
| CN104917147B (en) * | 2015-05-25 | 2018-04-13 | 余姚市嘉荣电子电器有限公司 | Ground wire zero curve partial pressure sampling type earth leakage protective device |
| CN105305377A (en) * | 2015-07-06 | 2016-02-03 | 钟兴明 | Single-phase multifunctional protector with low power consumption |
| CN105811367A (en) * | 2016-05-06 | 2016-07-27 | 广州市博达电子科技有限公司 | Electric leakage protection wall switch |
| CN107681629A (en) * | 2017-11-01 | 2018-02-09 | 乐清市诚富电器科技有限公司 | The full-automatic control circuit of earth leakage of one kind band overcurrent protective and its method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20180510 |