CN1964148A - An intelligent detection and protection circuit for termination of service life of ground fault breaker - Google Patents
An intelligent detection and protection circuit for termination of service life of ground fault breaker Download PDFInfo
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- CN1964148A CN1964148A CN 200610097713 CN200610097713A CN1964148A CN 1964148 A CN1964148 A CN 1964148A CN 200610097713 CN200610097713 CN 200610097713 CN 200610097713 A CN200610097713 A CN 200610097713A CN 1964148 A CN1964148 A CN 1964148A
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Abstract
The related intelligent detection protective circuit for lifetime termination of grounding fault breaker adds an abnormal monitor circuit for the leakage protector fault based on general leakage protector. This invention employs LED to display abnormal condition, and reduces accident for people protection.
Description
Affiliated technical field
The present invention relates to a kind of intelligent detection and protection circuit for termination of service life of ground fault breaker.
Background technology
The basic principle of the ground short circuit earth leakage protective device of low-voltage electrical apparatus ground-fault interrupter GFCI is: on the circuit of an alternating current active, live wire should equate with the loop current of zero line under the normal situation of electricity consumption.In case ground short circuit electric leakage accident takes place; then the electric current of live wire electric current in the loop and zero line will be uneven; induction coil in the GFCI earth leakage protective monitors its difference between current; and convert thereof into voltage signal; after relatively amplifying, electric-leakage detection circuit IC judges and exports to control partly; in case its difference is during greater than the threshold values set; control IC will be exported control signal corresponding; make the GFCI circuit breaker cut off the power supply of load end; disconnect being connected between power consumption equipment and the power supply, thereby play the protection purpose.
Leak current fault circuit breaker product is a kind of electronic installation that generally uses now; owing to environment for use, electricity consumption condition, improper installation, use components and parts to damage reason such as aging for a long time to cause partly that product can't provide correct defencive function; in case breaking down, product can't export control signal; or release lost efficacy and can't move, and will cause great Electrical Safety accident.Although the earth leakage protective product has manual measuring ability; but in fact few people can go to test; therefore just need in earth leakage protective GFCI device, get well and the automatic detection bad, that end-of-life is intelligent; the product that earth leakage protective lost efficacy is judged; send alarm signal and remind the user to take measures, or change existing product.
Summary of the invention
The purpose of this invention is to provide and a kind ofly the intelligent detection and protection circuit for termination of service life of ground fault breaker that carries out real-time monitoring and detection protection occurs when unusual at electric-leakage detection circuit and tripping mechanism.
The technical solution adopted for the present invention to solve the technical problems is: comprise electric-leakage detection circuit and tripping mechanism, by the voltage-stabilized power supply circuit that links (201), alternating current synchronizing signal sample circuit (202), simulation protection actuator (203), execution result testing circuit (204), carry out switch open circuit (205), electric leakage signal analog circuit (206), single-chip microprocessor MCU, with the intelligent detection and protection circuit (200) of monitoring, alarming circuit (208) composition of monitoring the detection of electrical leakage result to electric-leakage detection circuit and dropout action part, wherein, the AC network synchronous monitoring unit that AC synchronous signal sampling circuit (202) is made up of the single-chip microprocessor MCU signal is mentioned synchronous half-wave voltage signal and is given single-chip microcomputer from electrical network, with the sampled signal as real-time detection; Simulation protection actuator (203) and tripping mechanism coil L101 constitute the loop, detect tripping mechanism coil L101 and thyristor (101) current value when the action of threading off changes and change; Execution result testing circuit (204) links with simulation protection actuator (203), current value variable condition when the action of threading off changes detects back input single-chip microprocessor MCU with tripping mechanism coil and thyristor (101), and differentiating simultaneously is electric-leakage detection circuit partial fault or tripping mechanism partial fault; Electric leakage signal analog circuit (206) links with single-chip microprocessor MCU, single-chip microprocessor MCU triggers its generation electric leakage analog signal by sending impulse wave, the life-span stop detection control part is according to sampled signal and this electric leakage analog signal from AC synchronous signal sampling circuit (202) input, begin to detect the characteristic signals of reflection electric-leakage detection circuit characteristic, and start real-time detection simultaneously the part of threading off; Carry out switch open circuit (205) and link, will close the electric leakage dropout actuating signal switch open that the electrical network circuit causes by the simulation electric leakage signal that send electric leakage signal analog circuit (206) with single-chip microprocessor MCU; Monitoring, alarming circuit (208) links with single-chip microprocessor MCU, and it is by resistance R 204, R205, and triode Q201 and alarm device are formed, and after single-chip microcomputer is judged according to element circuit information, sends alarm signal by alarm device.
AC synchronous signal sampling circuit (202) is by resistance R 202, R203, the diode D202 composition that links.
Carrying out switch open circuit (205) is made up of the resistance R 2010 and the triode Q202 that link with single-chip microprocessor MCU.
Form by triode Q203, resistance R 2011 and resistance R 2012 with the electric leakage signal analog circuit (206) that single-chip microprocessor MCU links.
Form by resistance R 208, R209 and diode D203 with the execution result testing circuit (204) that simulation protection actuator (203) links.
The monitoring, alarming circuit (208) that links with single-chip microprocessor MCU is by resistance R 204, R205, and triode Q201 and alarm device are formed, and alarm device is the LED luminous tube.
The novel advantage of this use is: when under normal circumstances electric leakage taking place, can reliably thread off, and when standby; be exactly not leak electricity; when earth leakage protective device generation itself is unusual, can find early intuitively with the luminous tube indication; perhaps direct trip; conscientiously protection people's life security reduces because of the earth leakage protective device faults itself and can't thread off after leaking electricity, and the people is caused injury; disable, the accident that causes death takes place.
Description of drawings
Below in conjunction with drawings and Examples detailed content of the present invention is described.
Accompanying drawing is circuit theory diagrams of the present invention.
Embodiment
As shown in the figure, the present invention includes electric-leakage detection circuit and tripping mechanism, by the voltage-stabilized power supply circuit that links (201), alternating current synchronizing signal sample circuit (202), simulation protection actuator (203), execution result testing circuit (204), carry out switch open circuit (205), electric leakage signal analog circuit (206), single-chip microprocessor MCU, with the intelligent detection and protection circuit (200) of monitoring, alarming circuit (208) composition of monitoring the detection of electrical leakage result to electric-leakage detection circuit and dropout action part, wherein, AC synchronous signal sampling circuit (202) is by resistance R 202, R203, the diode D202 composition that links, from electrical network, mention synchronous half-wave voltage signal to single-chip microcomputer by the AC network synchronous monitoring unit that the single-chip microprocessor MCU signal is formed, with sampled signal as real-time detection; Simulation protection actuator (203) and tripping mechanism coil L101 constitute the loop, detect tripping mechanism coil L101 and thyristor (101) current value when the action of threading off changes and change; Execution result testing circuit (204) is made up of resistance R 208, R209 and diode D203, it links with simulation protection actuator (203), current value variable condition when the action of threading off changes detects back input single-chip microprocessor MCU with tripping mechanism coil and thyristor (101), and differentiating simultaneously is electric-leakage detection circuit partial fault or tripping mechanism partial fault; Electric leakage signal analog circuit (206) links with single-chip microprocessor MCU, form by triode Q203, resistance R 2011 and resistance R 2012, single-chip microprocessor MCU triggers its generation electric leakage analog signal by sending impulse wave, the life-span stop detection control part is according to sampled signal and this electric leakage analog signal from AC synchronous signal sampling circuit (202) input, begin to detect the characteristic signals of reflection electric-leakage detection circuit characteristic, and start real-time detection simultaneously the part of threading off; Carrying out switch open circuit (205) links with single-chip microprocessor MCU, form by the resistance R 2010 and the triode Q202 that link with single-chip microprocessor MCU, to close the electric leakage dropout actuating signal switch open that the electrical network circuit causes by the simulation electric leakage signal that send electric leakage signal analog circuit (206); Monitoring, alarming circuit (208) links with single-chip microprocessor MCU, and it is by resistance R 204, R205, and triode Q201 and alarm device are formed, and after single-chip microcomputer is judged according to element circuit information, sends alarm signal by alarm device, and alarm device can adopt the LED luminous tube.
Have its release part switching device of low-voltage electrical apparatus of earth leakage protective device, generally all adopt thyristor (SCR controllable silicon).When short circuit. when leaky took place, thyristor must guarantee normally.If thyristor can't conducting, then move the tripping coil loop open circuit, release can't move, and the input of circuit and load end power supply can't disconnect.
Verify whether the moving loop of tripping coil action is under the operating state of normally, with best bet be exactly created the condition of a conducting to the coil motion loop after, and then detect its loop whether conducting just passable.Trip gear action not only just needs the conducting of tripping coil loop, and the size of current that flows through in the coil and the time of conducting are all had certain relation, and the electric current of conducting and ON time must satisfy the condition of dropout loop conducting.Tripping coil, thyristor is connected on respectively on the different AC power alternating current circuits with Simulation execution mechanism, therefore the positive half cycle simulated action of alternating current loop is logical, so only at negative half period, tripping coil just can work, as long as close thyristor by force at negative half period, the signal of simulation electric leakage is only to have opened thyristor at positive half cycle so.So select grid alternating current to be on the positive-negative half-cycle, protection mechanism is made and simulated to the electric leakage action command that simulates that utilizes single-chip microcomputer to send.Carry out switch and come to trigger thyristor, detect difference on the loop then and confirm whether conducting with the respective value of determining.In fact utilize alternating current to cross null character after the thyristor conducting, be turned off soon naturally, action so assurance release tripper does not make a mistake.
Consult earth leakage protective device end-of-life Intelligent Measurement circuit diagram of the present invention; as shown in the figure; earth leakage protective device end-of-life Intelligent Measurement warning circuit can be divided into 2 parts by function; first part is that 100, the second parts of former leakage protective device circuit are the end-of-life Intelligent Measurement warning circuit 200 of core with the single-chip microcomputer.
Circuit 100 mainly comprises two groups of induction coil L101 that detect leakage current, L102, and commutation supply voltage circuit, manual test 104, reset circuit 103 and dropout actuation coil loop 102, thyristor 101, and release SW105.
Circuit 200 mainly comprises single-chip microprocessor MCU, voltage-stabilized power supply circuit 201, AC synchronous signal sampling circuit 202; simulate protection actuator 203, execution result testing circuit 204 is carried out switching circuit 205; electric leakage signal analog circuit 206 and monitoring detection of electrical leakage result's monitoring, alarming circuit 208
Circuit 200 power supplies are by the mode of 201 employing electric resistance partial pressure methods.Shown among the figure 201, the power supply after the rectification constitutes step-down, voltage stabilizing, filter circuit by resistance R 201, diode D201, capacitor C 201, provides suitable operating voltage to single-chip microprocessor MCU.
End-of-life Intelligent Measurement circuit must be finished testing process by simulation electric leakage actuating signal, with regard to the above, so just need extract AC network alternating current positive-negative half-cycle synchronizing signal and do community, as shown in the figure, AC synchronous signal sampling circuit 202 extracts synchronous half-wave voltage signal from electrical network, to supply single-chip microprocessor MCU as detecting sampled signal in real time.Circuit is made up of resistance R 202, R203 and diode D202.
Simulation protection actuator 203 constitutes the loop with tripping mechanism coil L101, detects tripping mechanism coil L101 and thyristor 101 current value when the action of threading off changes and changes.As accompanying drawing 1, vacation there is not live wire and the zero line difference called after A line and the B line of AC network circuit, and tripping coil L101, diode D101 receive on the alternating current wires A, and it can only just have electric current to flow through when the positive half cycle of alternating current.Simulation protection actuator 203, diode D204 and resistance R 207 are received on the B line of alternating current electrical network, and it can only just have electric current to flow through simultaneously at alternating current negative half.
Carry out switching circuit 205, see accompanying drawing 1, link with single-chip microprocessor MCU, by resistance R 2010, triode Q202, form and close simulation electric leakage signal system, in the time of the positive half cycle of alternating current, close the trigger end of SCR101, in negative half period, open the trigger end of SCR101, when simulation electric leakage actuating signal was come, tripping coil 102 can not act on like this.
Execution result testing circuit 204 links with simulation protection actuator 203; it is by resistance R 208; R209 and diode D203 form 203; 102; 101 circuit carry out the detection of working morphology; wherein in the positive half cycle of alternating current, close the trigger end of SCR101; in negative half period, open the trigger end of SCR101; when simulation electric leakage actuating signal is come; when tripping coil 102 does not act on; resistance R 207 in the simulation protection actuator 203 just has electric current and flows through; detect the change in voltage difference of resistance R 207 lower ends this moment, thereby judge the electric current changing value of resistance R 207.Output to single-chip microprocessor MCU then, judge the operating state of circuit 100,101,102.If electric-leakage detection circuit 100 and tripping coil 102, thyristor 101 have fault, in simulation electric leakage signal section operate time, the following terminal voltage of resistance R 207 can not change, and just can judge electric-leakage detection circuit and dropout moving system fault so.
Electric leakage analog circuit 206 links with single-chip microprocessor MCU, form by triode Q203, resistance R 2011, R2012, single-chip microprocessor MCU is sent impulse wave and is at first triggered simulation electric leakage system, provide the electric leakage analog signal to detecting unit, each unit will produce certain threshold current voltage, and single-chip microprocessor MCU is made corresponding instruction to this current potential size judgement.
Monitoring, alarming circuit 208 links with single-chip microprocessor MCU, and it is by resistance R 204, R205, and triode Q201 and alarm device are formed, and alarm device adopts the LED luminous tube.After single-chip microprocessor MCU is judged according to element circuit information, send signal by alarm unit.Frequency scintillation with per second 4 times.This circuit and monolithic mechanism also can send alarm signal during this observation circuit faults itself, and the warning pattern is long bright with alarm lamp.
In intelligent detection and protection circuit for termination of service life of ground fault breaker of the present invention; it is after detecting the AC synchronous signal of sampling by single-chip microcomputer Pin2 that end-of-life begins from detection; Pin1 sends short pulse and produces the simulation electric leakage signal for electric leakage analog circuit 206; see accompanying drawing; under the normal in working order situation of main electric-leakage detection circuit; should export the control utmost point that a high impulse triggers thyristor 101 this moment; at this moment pin0 sends instruction and turn-offs these high impulses to carrying out switching circuit 205; combine the above; simulation protection this moment actuator 203 will have potential value and change; after pin4 detected this changing value, making was non-fault judgement.If electric-leakage detection circuit can not detect the simulation electric leakage signal, or thyristor, any unit of tripping coil breaks down, and then judges the earth leakage protective device end-of-life, and monitoring, alarming circuit 208 sends alarm signal at this moment.
Claims (6)
1; a kind of intelligent detection and protection circuit for termination of service life of ground fault breaker; comprise electric-leakage detection circuit and tripping mechanism; it is characterized in that: by the voltage-stabilized power supply circuit that links (201); alternating current synchronizing signal sample circuit (202); simulation protection actuator (203); execution result testing circuit (204); carry out switch open circuit (205); electric leakage signal analog circuit (206); single-chip microprocessor MCU; with the intelligent detection and protection circuit (200) of monitoring, alarming circuit (208) composition of monitoring the detection of electrical leakage result to electric-leakage detection circuit and dropout action part; wherein
The AC network synchronous monitoring unit that AC synchronous signal sampling circuit (202) is made up of the single-chip microprocessor MCU signal is mentioned synchronous half-wave voltage signal and is given single-chip microcomputer from electrical network, with the sampled signal as real-time detection;
Simulation protection actuator (203) and tripping mechanism coil L101 constitute the loop, detect tripping mechanism coil L101 and thyristor (101) current value when the action of threading off changes and change;
Execution result testing circuit (204) links with simulation protection actuator (203), current value variable condition when the action of threading off changes detects back input single-chip microprocessor MCU with tripping mechanism coil and thyristor (101), and differentiating simultaneously is electric-leakage detection circuit partial fault or tripping mechanism partial fault;
Electric leakage signal analog circuit (206) links with single-chip microprocessor MCU, single-chip microprocessor MCU triggers its generation electric leakage analog signal by sending impulse wave, the life-span stop detection control part is according to sampled signal and this electric leakage analog signal from AC synchronous signal sampling circuit (202) input, begin to detect the characteristic signals of reflection electric-leakage detection circuit characteristic, and start real-time detection simultaneously the part of threading off;
Carry out switch open circuit (205) and link, will close the electric leakage dropout actuating signal switch open that the electrical network circuit causes by the simulation electric leakage signal that send electric leakage signal analog circuit (206) with single-chip microprocessor MCU;
Monitoring, alarming circuit (208) links with single-chip microprocessor MCU, and it is by resistance R 204, R205, and triode Q201 and alarm device are formed, and after single-chip microcomputer is judged according to element circuit information, sends alarm signal by alarm device.
2, intelligent detection and protection circuit for termination of service life of ground fault breaker according to claim 1 is characterized in that AC synchronous signal sampling circuit (202) by resistance R 202, R203, the diode D202 composition that links.
3, intelligent detection and protection circuit for termination of service life of ground fault breaker according to claim 1 is characterized in that carrying out switch open circuit (205) and is made up of the resistance R 2010 and the triode Q202 that link with single-chip microprocessor MCU.
4, intelligent detection and protection circuit for termination of service life of ground fault breaker according to claim 1 is characterized in that the electric leakage signal analog circuit (206) that links with single-chip microprocessor MCU is made up of triode Q203, resistance R 2011 and resistance R 2012.
5, intelligent detection and protection circuit for termination of service life of ground fault breaker according to claim 1 is characterized in that the execution result testing circuit (204) that links with simulation protection actuator (203) is made up of resistance R 208, R209 and diode D203.
6, intelligent detection and protection circuit for termination of service life of ground fault breaker according to claim 1; the monitoring, alarming circuit (208) that it is characterized in that linking with single-chip microprocessor MCU is by resistance R 204, R205; triode Q201 and alarm device are formed, and alarm device is the LED luminous tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610097713 CN1964148A (en) | 2006-11-21 | 2006-11-21 | An intelligent detection and protection circuit for termination of service life of ground fault breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610097713 CN1964148A (en) | 2006-11-21 | 2006-11-21 | An intelligent detection and protection circuit for termination of service life of ground fault breaker |
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| CN1964148A true CN1964148A (en) | 2007-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610097713 Pending CN1964148A (en) | 2006-11-21 | 2006-11-21 | An intelligent detection and protection circuit for termination of service life of ground fault breaker |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427394A (en) * | 2013-09-06 | 2013-12-04 | 天津华宁电子有限公司 | Mining flame-proof type selective leakage protector |
| CN104795789A (en) * | 2015-03-20 | 2015-07-22 | 张家港市佰瑞普电器科技有限公司 | Automatic monitoring circuit for earth fault leakage protector |
| CN107196270A (en) * | 2017-06-30 | 2017-09-22 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control systems of hot-water heating controller |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN118209915A (en) * | 2024-01-23 | 2024-06-18 | 厦门芯阳科技股份有限公司 | Self-detection system for life end of ground fault device |
| CN118209915B (en) * | 2024-01-23 | 2024-10-25 | 厦门芯阳科技股份有限公司 | Self-detection system for life end of ground fault device |
-
2006
- 2006-11-21 CN CN 200610097713 patent/CN1964148A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427394A (en) * | 2013-09-06 | 2013-12-04 | 天津华宁电子有限公司 | Mining flame-proof type selective leakage protector |
| CN103427394B (en) * | 2013-09-06 | 2015-08-12 | 天津华宁电子有限公司 | A kind of mining explosion-isolating low-voltage selective earth leakage protection device |
| CN104795789A (en) * | 2015-03-20 | 2015-07-22 | 张家港市佰瑞普电器科技有限公司 | Automatic monitoring circuit for earth fault leakage protector |
| CN104795789B (en) * | 2015-03-20 | 2017-07-28 | 张家港市佰瑞普电器科技有限公司 | A kind of automatic monitoring circuit of earth fault earth leakage protective device |
| CN107196270A (en) * | 2017-06-30 | 2017-09-22 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control systems of hot-water heating controller |
| CN107196270B (en) * | 2017-06-30 | 2019-01-15 | 芜湖佳宏新材料股份有限公司 | A kind of electricity floor heating, the GFCI control system of hot-water heating controller |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN118209915A (en) * | 2024-01-23 | 2024-06-18 | 厦门芯阳科技股份有限公司 | Self-detection system for life end of ground fault device |
| CN118209915B (en) * | 2024-01-23 | 2024-10-25 | 厦门芯阳科技股份有限公司 | Self-detection system for life end of ground fault device |
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