CN101702510A - Home-use self-recovering leakage-current alarm and power-failure protection device - Google Patents
Home-use self-recovering leakage-current alarm and power-failure protection device Download PDFInfo
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- CN101702510A CN101702510A CN200910199060A CN200910199060A CN101702510A CN 101702510 A CN101702510 A CN 101702510A CN 200910199060 A CN200910199060 A CN 200910199060A CN 200910199060 A CN200910199060 A CN 200910199060A CN 101702510 A CN101702510 A CN 101702510A
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Abstract
The invention relates to a home-use self-recovering leakage-current alarm and power-failure protection device, comprising a signal detection circuit, an electronic switch circuit, a triggering circuit, an alarm circuit and a work power supply circuit, wherein the signal detection circuit, the electronic switch circuit, the triggering circuit and the alarm circuit are connected by a circuit in sequence, and are connected with the work power supply circuit by a circuit. In the invention, an alarm is sent, and the power supply is cut off when detecting leakage of electricity and carrying out protection, thereby accidents are prevented from occurring or expanding in time, and reasons of power failure caused by leakage of electricity can be judged according to the alarm. After the failure of leakage of electricity is eliminated, the device automatically recovers power supply, and the alarm is stopped.
Description
Technical field
The present invention relates to a kind of home-use self-recovering leakage-current alarm and power-failure protection device.
Background technology
At present, many alarm frees of household electricity protective device function, often being hard to tell the Chu Fasheng outage is owing to grid power blackout, blown fuse; still because of the protective device action, need to confirm, in addition through further inspection; need the hand-reset power supply after the protective device action, make troubles to use.
Summary of the invention
A kind of home-use self-recovering leakage-current alarm and power-failure protection device provided by the invention; send chimes of doom when protection is implemented in electric leakage and cut off the electricity supply detecting; the accident that in time prevents takes place or enlarges; and can judge the outage reason that electric leakage causes according to chimes of doom; after leak current fault is got rid of; protective device automatically resets, and chimes of doom stops.
In order to achieve the above object, the invention provides a kind of home-use self-recovering leakage-current alarm and power-failure protection device, comprise signal deteching circuit, electronic switching circuit, circuits for triggering, the warning circuit of circuit connection successively, also comprise the working power circuit that circuit connects foregoing circuit;
Described signal deteching circuit is a zero-sequence transformer, comprises first coil and second coil that connect power firestreak and zero line respectively, also comprises tertiary coil;
Described electronic switching circuit comprises circuit and connects the rectification circuit of tertiary coil and the triode that circuit connects described rectification circuit; Described rectification circuit comprises first diode and first electric capacity and second electric capacity that circuit connects;
Described circuits for triggering are monostable flipflop, comprise timer and the capacitance-resistance module that is connected this timer, the input of described timer connects the collector electrode of described triode, described capacitance-resistance module comprises timing resistor and timing capacitor, changes the adjustable size joint delay time of timing resistor and timing capacitor;
Described warning circuit comprises relay and the alarm that circuit connects, and described 220V AC power is by the normally-closed contact control of relay, and triode and loud speaker constitute alarm;
Described working power circuit comprises capacity voltage dropping circuit, current rectifying and wave filtering circuit and the voltage-stabilized power supply circuit that circuit connects, and this working power circuit provides direct-current working volts to warning circuit.
Under the normal condition, because of the instantaneous size of current that flows through first coil and second coil equates, frequency is identical, phase place is opposite, and the total magnetic flux in the instrument transformer is zero, non-inductive electric current in the tertiary coil, the electric current that flows through in first coil and second coil when electric leakage or short trouble take place is no longer equal, just induce an alternating voltage in the tertiary coil, carry out halfwave rectifier by diode, first electric capacity and second electric capacity, the triode conducting; Under the normal condition, the input of timer is a high level, and output is a low level, warning circuit is not worked, when breaking down, and the triode conducting, the input of timer changes low level into by high level, correspondingly, and output output high level, realize upset, drive warning circuit work, relay gets electric adhesive, normally-closed contact disconnects, cut off AC power, triode gets electric, drives loud speaker and sends alarm sound.After leak current fault is got rid of, because of the size of current that flows through first coil and second coil equates that frequency is identical; phase place is opposite, and the total magnetic flux in the instrument transformer is zero, and induced current disappears in the tertiary coil; through behind the delay time, protective device automatically resets, and chimes of doom stops.
When owing to this protective device of electrical appliance electric leakage causing action outage, can hear chimes of doom; If indoor sudden power but do not have chimes of doom illustrate that grid power blackout or fuse are out of joint, but emphasis inspection fuse.
The present invention is detecting when electric leakage, sends chimes of doom and cuts off the electricity supply, and the accident that prevents takes place or enlarges.And in view of the above chimes of doom can to judge the outage reason be because electric leakage causes protective device action.After leak current fault was got rid of, protective device can automatically reset, and chimes of doom stops.
Description of drawings
Fig. 1 is the circuit diagram of a kind of home-use self-recovering leakage-current alarm and power-failure protection device provided by the invention.
Embodiment
Following according to Fig. 1, specify preferred embodiment of the present invention:
As shown in Figure 1, be a kind of home-use self-recovering leakage-current alarm and power-failure protection device, comprise signal deteching circuit, electronic switching circuit, circuits for triggering, the warning circuit of circuit connection successively, also comprise the working power circuit that circuit connects foregoing circuit;
Described signal deteching circuit is a zero-sequence transformer, comprises the first coil L1 and the second coil L2 that connect power firestreak and zero line respectively, also comprises tertiary coil L3; Under the normal condition, because of the instantaneous size of current that flows through the first coil L1 and the second coil L2 equates, frequency is identical, phase place is opposite, total magnetic flux in the instrument transformer is zero, non-inductive electric current among the tertiary coil L3, and the electric current that flows through among the first coil L1 and the second coil L2 when electric leakage or short trouble take place is no longer equal, just induce an alternating voltage among the tertiary coil L3, export as detection signal;
Described electronic switching circuit comprises circuit and connects the rectification circuit of tertiary coil L3 and the triode VT that circuit connects described rectification circuit; Described rectification circuit comprises the first diode VD1 and first capacitor C 1 and second capacitor C 2 that circuit connects; When electric leakage or short trouble took place, tertiary coil L3 induced an alternating voltage, carries out halfwave rectifier, triode VT conducting by diode VD1, first capacitor C 1 and second capacitor C 2;
Described circuits for triggering are monostable flipflop, comprise timer IC1 and the capacitance-resistance module that is connected this timer IC1, the input of described timer IC1 connects the collector electrode of described triode VT, described capacitance-resistance module comprises timing resistor R2 and timing capacitor C3, output pulse width TW ≈ 1.1R2C3, the adjustable size that changes timing resistor R2 and timing capacitor C3 saves delay time; Under the normal condition, input 2 pin of timer IC1 are high level, output 3 pin are low level, and warning circuit is not worked, when breaking down, triode VT conducting, input 2 pin of timer IC1 change low level into by high level, correspondingly, and output 3 pin output high level, realize upset, drive warning circuit work;
Described warning circuit comprises relay K and the alarm that circuit connects, and described 220V AC power is by the normally-closed contact K-1 control of relay K, and triode IC2 and loud speaker BL constitute alarm; When the output of circuits for triggering was exported high level, relay K got electric adhesive, and normally-closed contact K-1 disconnects, and cuts off AC power, and triode IC2 gets electric, drove loud speaker BL and sent alarm sound;
Described working power circuit comprises capacity voltage dropping circuit, current rectifying and wave filtering circuit and the voltage-stabilized power supply circuit that circuit connects, described capacity voltage dropping circuit is a capacitor C 6, described current rectifying and wave filtering circuit is diode VD3～VD6 and filter capacitor C5, described voltage-stabilized power supply circuit is voltage stabilizing didoe VD7, and this working power circuit provides 6V direct-current working volts to warning circuit.
In the present embodiment, timer IC1 is a time-base circuit 555, optional disposable type.Triode IC2 is the music triode, and optional VT66A type needn't outward element, only meets loud speaker BL and gets final product, and sound is loud and clear.Triode VT selects NPN type triode, can select models such as 9014 for use, β 〉=80.Diode VD1～VD6 is a rectifier diode, selects 1N4004, or selects 1A/200V full-bridge rectification piece.Diode VD7 is a voltage stabilizing didoe, selects 2CW14.Relay K is the 6V direct current relay, types such as optional JRF-13F, and two groups of contacts, electric current is greater than 2A.Loud speaker BL selects small-bore slim 8 Ω/0.25W.Resistance R 1～R4 all selects 0.25W metal film or carbon film resistor for use.Capacitor C 1, C4 select the nonpolarity ceramic dielectric electric capacity of the withstand voltage 10V of being not less than for use; Capacitor C 6 is selected the CBB type electric capacity of withstand voltage 630V for use; Capacitor C 2, C3 and C5 select the withstand voltage 16V of being not less than common electrical electrolysis condenser for use.
As long as components and parts are good, to install errorlessly, firm welding is reliable, and the present invention is the energy operate as normal all.
The warning delay time is decided by the numerical value of timing resistor R2 and timing capacitor C3, and delay time is 5～8 seconds, can need be adjusted according to it.When if device action is sensitive inadequately, can suitably increases the number of turn of tertiary coil L3 or strengthen the line footpath.
The present invention is installed in the insulation box body of suitable size.Convenient for the mounting or dismounting input-output line, be preferably in the box body rear side binding post is set. when owing to this protective device of electrical appliance electric leakage causing action outage, can hear chimes of doom; If indoor sudden power but do not have chimes of doom illustrate that grid power blackout or fuse are out of joint, but emphasis inspection fuse.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (5)
1. a home-use self-recovering leakage-current alarm and power-failure protection device is characterized in that, this device comprises signal deteching circuit, electronic switching circuit, circuits for triggering, the warning circuit of circuit connection successively, also comprises the working power circuit that circuit connects foregoing circuit;
Described signal deteching circuit is a zero-sequence transformer, comprises first coil (L1) and second coil (L2) that connect power firestreak and zero line respectively, also comprises tertiary coil (L3); Under the normal condition, because of the instantaneous size of current that flows through first coil (L1) and second coil (L2) equates, frequency is identical, phase place is opposite, total magnetic flux in the instrument transformer is zero, non-inductive electric current in the tertiary coil (L3), and the electric current that flows through in first coil (L1) and second coil (L2) when electric leakage or short trouble take place is no longer equal, just induce an alternating voltage in the tertiary coil (L3), export as detection signal;
Described electronic switching circuit comprises circuit and connects the rectification circuit of tertiary coil (L3) and the triode (VT) that circuit connects described rectification circuit; When electric leakage or short trouble took place, tertiary coil (L3) induced an alternating voltage, carries out halfwave rectifier by rectification circuit, triode (VT) conducting;
Described circuits for triggering are monostable flipflop, comprise timer (IC1) and the capacitance-resistance module that is connected this timer (IC1), the input of described timer (IC1) connects the collector electrode of described triode (VT), changes the adjustable size joint delay time of capacitance-resistance module; Under the normal condition, input 2 pin of timer (IC1) are high level, output 3 pin are low level, and warning circuit is not worked, when breaking down, triode (VT) conducting, input 2 pin of timer (IC1) change low level into by high level, correspondingly, and output 3 pin output high level, realize upset, drive warning circuit work;
Described warning circuit comprises relay (K) and the alarm that circuit connects, and described 220V AC power is by normally-closed contact (K-1) control of relay (K), and triode (IC2) constitutes alarm with loud speaker (BL); When the output of circuits for triggering was exported high level, relay (K) got electric adhesive, and normally-closed contact (K-1) disconnects, and cuts off AC power, and triode (IC2) gets electric, and driving loud speaker (BL) sends alarm sound.
2. home-use self-recovering leakage-current alarm and power-failure protection device as claimed in claim 1 is characterized in that, described rectification circuit comprises first diode (VD1) and first electric capacity (C1) and second electric capacity (C2) that circuit connects.
3. home-use self-recovering leakage-current alarm and power-failure protection device as claimed in claim 1 is characterized in that, described capacitance-resistance module comprises timing resistor (R2) and timing capacitor (C3), output pulse width TW ≈ 1.1R2C3.
4. home-use self-recovering leakage-current alarm and power-failure protection device as claimed in claim 1; it is characterized in that; described working power circuit comprises capacity voltage dropping circuit, current rectifying and wave filtering circuit and the voltage-stabilized power supply circuit that circuit connects, and this working power circuit provides direct-current working volts to warning circuit.
5. home-use self-recovering leakage-current alarm and power-failure protection device as claimed in claim 4; it is characterized in that; described capacity voltage dropping circuit is electric capacity (C6); described current rectifying and wave filtering circuit is that (VD3～VD6) and filter capacitor (C5), described voltage-stabilized power supply circuit is voltage stabilizing didoe (VD7) to diode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910199060A CN101702510A (en) | 2009-11-19 | 2009-11-19 | Home-use self-recovering leakage-current alarm and power-failure protection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910199060A CN101702510A (en) | 2009-11-19 | 2009-11-19 | Home-use self-recovering leakage-current alarm and power-failure protection device |
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| CN101702510A true CN101702510A (en) | 2010-05-05 |
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| CN200910199060A Pending CN101702510A (en) | 2009-11-19 | 2009-11-19 | Home-use self-recovering leakage-current alarm and power-failure protection device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204824A (en) * | 2011-11-28 | 2014-12-10 | 诺丁汉大学 | Fault location in power distribution systems |
| CN104978818A (en) * | 2014-04-04 | 2015-10-14 | 南京化工职业技术学院 | Burglar alarm |
| CN106696996A (en) * | 2017-01-23 | 2017-05-24 | 株洲中车时代电气股份有限公司 | Train failure report method and train failure report system |
| WO2019173978A1 (en) * | 2018-03-13 | 2019-09-19 | 深圳配天智能技术研究院有限公司 | Robot control system, power monitoring method, robot and storage apparatus |
| WO2019173979A1 (en) * | 2018-03-13 | 2019-09-19 | 深圳配天智能技术研究院有限公司 | Robot control system, power supply monitoring method, robot, and storage apparatus |
| CN110632442A (en) * | 2019-10-10 | 2019-12-31 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN116626533A (en) * | 2023-07-20 | 2023-08-22 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
-
2009
- 2009-11-19 CN CN200910199060A patent/CN101702510A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104204824A (en) * | 2011-11-28 | 2014-12-10 | 诺丁汉大学 | Fault location in power distribution systems |
| US10352984B2 (en) | 2011-11-28 | 2019-07-16 | The University Of Nottingham | Fault location in power distribution systems |
| CN104978818A (en) * | 2014-04-04 | 2015-10-14 | 南京化工职业技术学院 | Burglar alarm |
| CN106696996A (en) * | 2017-01-23 | 2017-05-24 | 株洲中车时代电气股份有限公司 | Train failure report method and train failure report system |
| CN106696996B (en) * | 2017-01-23 | 2018-10-12 | 株洲中车时代电气股份有限公司 | A kind of train fault report method and system |
| WO2019173978A1 (en) * | 2018-03-13 | 2019-09-19 | 深圳配天智能技术研究院有限公司 | Robot control system, power monitoring method, robot and storage apparatus |
| WO2019173979A1 (en) * | 2018-03-13 | 2019-09-19 | 深圳配天智能技术研究院有限公司 | Robot control system, power supply monitoring method, robot, and storage apparatus |
| CN110632442A (en) * | 2019-10-10 | 2019-12-31 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN110632442B (en) * | 2019-10-10 | 2021-11-23 | 华东光电集成器件研究所 | Capacitor aging leakage detection power-off protection circuit |
| CN116626533A (en) * | 2023-07-20 | 2023-08-22 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
| CN116626533B (en) * | 2023-07-20 | 2023-10-13 | 山东云开电力有限公司 | Intelligent detection circuit for electric leakage of power switch cabinet |
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Open date: 20100505 |