CN104868443A - Automatic power-on intelligent-type electric leakage protector - Google Patents
Automatic power-on intelligent-type electric leakage protector Download PDFInfo
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- CN104868443A CN104868443A CN201510248991.XA CN201510248991A CN104868443A CN 104868443 A CN104868443 A CN 104868443A CN 201510248991 A CN201510248991 A CN 201510248991A CN 104868443 A CN104868443 A CN 104868443A
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Abstract
The invention discloses an automatic power-on intelligent-type electric leakage protector, and the protector comprises a live line, a zero line, a ground line, a wall body line, a tripper, a rectification voltage-stabilizing circuit, an amplification circuit, a zero-sequence mutual inductor connected with the amplification circuit, and a ground line mutual inductor connected with the amplification circuit. The protector also comprises an optical coupler U1, an optical coupler U2, an optical coupler U3, and a single-chip microcomputer IC1. The protector irons out the defects of all conventional electric leakage protectors and designs with potential safety hazards, is an omnibearing protection type electric leakage protector which integrated all functions into one body, and is intelligent, safe and reliable. The protection achieves the cut-off of power after coming out from water, achieves a use effect of water-electricity isolation, and has no potential safety hazards. The protector overcomes all the abnormalities caused by live-line and wiring errors of the ground line, and a system can carry out effective recognition detection and control.
Description
Technical field
The present invention relates to Electrical Safety resist technology field, especially relate to the intelligent leakage protector that automatically powers on.
Background technology
The defencive function of earth leakage protective device is under being based upon the normal prerequisite of power supply; ground wire abnormal charged or load electric leakage just provides the defencive function cutting off load supplying loop. and leak guarantor's device power supply complete machine is quit work reach energy-conservation object because user's ubiquity socket switch goes to cut off; just because of this, protect device to lose the job power supply now ground wire is abnormal if leak chargedly will cause leaking guarantor's device and do not trip and cause electric shock.Like this, guarantor's device power supply is leaked to bad also equivalent closedown of female contact, has a strong impact on personal safety hidden danger.
Summary of the invention
(1) technical problem that will solve
Object of the present invention will overcome above-mentioned shortcoming exactly, aims to provide one and automatically to power on intelligent leakage protector.
(2) technical scheme
For solving the problem, the present invention proposes one and automatically to power on intelligent leakage protector, comprise live wire, zero line, ground wire, release, regulator rectifier circuit, amplifying circuit, the zero-sequence transformer be connected with amplifying circuit and ground wire instrument transformer, also comprise optocoupler U1, optocoupler U2, optocoupler U3 and single-chip microcomputer IC1; Pin 2 and the zero line of described optocoupler U1 are electrically connected, and the pin 1 of optocoupler U1 connects the pin 4 of described optocoupler U2, and described optocoupler U1 pin 4 connects the A pin of single-chip microcomputer IC1, and the pin 3 of optocoupler U1 connects the pin 2 of optocoupler U2; The pin 1 of described optocoupler U2 connects the B pin of single-chip microcomputer IC1, and pin 2 and the ground wire of described optocoupler U2 are electrically connected; Be provided with voltage-stabiliser tube D9 between the pin 1 of described optocoupler U3 and ground wire, pin 3 ground connection of described optocoupler U3, the pin 4 of optocoupler U3 connects the C pin of single-chip microcomputer; Ground wire instrument transformer is used for ground line current and detects, and its output is connected with single-chip microcomputer IC1;
Wherein, when optocoupler U1 conducting, the A pin of single-chip microcomputer IC1 calculates the voltage between ground wire-zero line, and after temporary memory, the B pin of single-chip microcomputer IC1 exports high level, makes optocoupler U2 conducting, cause the A pin voltage drop of single-chip microcomputer IC1, single-chip microcomputer calculates A pin voltage change △ V, makes the following judgment:
When ground terminal is opened a way: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When ground wire-zero line short circuit: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When the mutually trans-earth short of zero line live wire: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
During local line end loose contact: Δ V< single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When live wire-zero line error-polarity connection, now Δ V>> single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode.
Further, ground wire electrification indicator light LED1 is also provided with between described zero line and optocoupler U1.
Further, voltage-stabiliser tube D8 is also provided with between 3 pin of described optocoupler U2 and 4 pin.
Further, between described ground wire and optocoupler U3, be also provided with voltage-stabiliser tube D9, between described voltage-stabiliser tube D9 and body of wall line, be also connected with protection diode D2.
Further, described single-chip microcomputer IC1 is also connected with water flow switch J1.
Further, described release is also provided with keeping coil L1.
Further, this circuit is also provided with controllable silicon Q7 and controllable silicon Q8, and described controllable silicon Q7 is for controlling keeping coil L1; Trigger electrode and the controllable silicon Q8 trigger electrode of described controllable silicon Q7 are all controlled by single-chip microcomputer IC1, and described controllable silicon Q8 is for controlling the break-make of power supply.
Further, described zero-sequence mutual inductance coil carries out self-inspection by single-chip microcomputer IC1.
Further, this circuit is also provided with high-temperature protection circuit and warning device.
Further, described single-chip microcomputer IC preset value is the magnitude of voltage of a upper cycle pin A.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages: the intelligent leakage protector that automatically powers on is the shortcoming and the potential safety hazard design that overcome existing all earth leakage protective devices, be the earth leakage protective device of the omnibearing protection type that long-pending all functions are integrated, intelligent and safe is reliable; Water outlet power-off, accomplishes water power isolation result of use, does not have use safety hidden danger; Overcome the exception that all charged and wiring error of ground wire etc. is brought, system all can effectively recognition detection and control; Solve the circut breaking that do not trip during traditional earth leakage protective device switch control rule, stopped potential safety hazard and improve energy-saving effect, for a long time need not direct closing control switch; Add self-checking function, stop potential fail safe hidden danger.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the intelligent leakage protector embodiment one that automatically powers on of the present invention;
Fig. 2 be the intelligent leakage protector embodiment two that automatically powers on of the present invention circuit theory diagrams;
Fig. 3 be the intelligent leakage protector embodiment three that automatically powers on of the present invention circuit theory diagrams.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Embodiment one
As shown in Figure 1, the present invention proposes one and automatically to power on intelligent leakage protector, comprise live wire L, zero line N, ground wire E, release, regulator rectifier circuit (rectifier diode D10), amplifying circuit U5, the zero-sequence transformer ZCT1 be connected with amplifying circuit U5 and ground wire E instrument transformer, also comprise optocoupler U1, optocoupler U2, optocoupler U3 and single-chip microcomputer IC1; Pin 2 and the zero line N of described optocoupler U1 are electrically connected, and the pin 1 of optocoupler U1 connects the pin 4 of described optocoupler U2, and described optocoupler U1 pin 4 connects the A pin of single-chip microcomputer IC1, and the pin 3 of optocoupler U1 connects the pin 2 of optocoupler U2; The pin 1 of described optocoupler U2 connects the B pin of single-chip microcomputer IC1, and the pin 3 of described optocoupler U2 is gone here and there C2 and ground wire E and is electrically connected; Be provided with voltage-stabiliser tube D9 between the pin 1 of described optocoupler U3 and ground wire E, pin 3 ground connection of described optocoupler U3, the pin 4 of optocoupler U3 connects the C pin of single-chip microcomputer; Ground wire E instrument transformer is used for ground wire E current detecting, and its output is connected with single-chip microcomputer IC1; Body of wall line Ee is also provided with in the present embodiment.
Wherein, when optocoupler U1 conducting, the A pin of single-chip microcomputer IC1 calculates the voltage between ground wire E-zero line N, and after temporary memory, the B pin of single-chip microcomputer IC1 exports high level, makes optocoupler U2 conducting, causes the A pin voltage drop of single-chip microcomputer IC1, single-chip microcomputer calculates A pin voltage change △ V, makes the following judgment:
When ground wire E holds open circuit: Δ V=0, single-chip microcomputer IC1 carry out ground wire E current detecting by ground wire E instrument transformer, and namely systematic evaluation is to current mode protected mode;
When the N short circuit of ground wire E-zero line: Δ V=0, single-chip microcomputer IC1 carry out ground wire E current detecting by ground wire E instrument transformer, and namely systematic evaluation is to current mode protected mode;
When the trans-ground wire E short circuit of zero line N live wire L phase: Δ V=0, single-chip microcomputer IC1 carry out ground wire E current detecting by ground wire E instrument transformer, and namely systematic evaluation is to current mode protected mode;
When ground wire E end in contact is bad: Δ V< single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground wire E current detecting by ground wire E instrument transformer, and namely systematic evaluation is to current mode protected mode;
When live wire L-zero line N error-polarity connection, now Δ V>> single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground wire E current detecting by ground wire E instrument transformer, and namely systematic evaluation is to current mode protected mode.
The charged indicator light LED1 of ground wire E is also provided with between described zero line N and optocoupler U1, charged for showing ground wire E.
Voltage-stabiliser tube D8 is also provided with between 3 pin of described optocoupler U2 and 4 pin.
Also be provided with voltage-stabiliser tube D9 between described ground wire E and optocoupler U3, between described voltage-stabiliser tube D9 and body of wall line Ee, be also connected with protection diode D2.
Described single-chip microcomputer IC1 is also connected with water flow switch J1, and earth leakage protective device is when coordinating electric hot water to use, and when water flow switch is connected, system forces keeping coil L1 to discharge.
Described release is also provided with keeping coil L1.
This circuit is also provided with controllable silicon Q7 and controllable silicon Q8, and described controllable silicon Q7 is for controlling keeping coil L1; Trigger electrode and the controllable silicon Q8 trigger electrode of described controllable silicon Q7 are all controlled by single-chip microcomputer IC1, and described controllable silicon Q8 is for controlling the break-make of power supply.
Described zero-sequence transformer ZCT1 carries out self-inspection by single-chip microcomputer IC1.
Described single-chip microcomputer IC preset value is the magnitude of voltage of a upper cycle pin A.
This circuit is also provided with high-temperature protection circuit and warning device, and wherein high temperature protection comprises thermistor RT1, and by microprocessor detect high-temperature condition; Warning device comprises loud speaker LS1, for sending alarm sound.
Below in conjunction with physical circuit schematic diagram Fig. 1, implementation procedure of the present invention is described in detail:
1. automatic upper Electricity Functional
Protector plug access 220V input power, single-chip microcomputer IC1 self-inspection completes ICI_I pin and exports high level, through resistance R17, Q7 turn-on power voltage VCC forms loop through L1, R28, Q7, the pre-adhesive of keeping coil, meanwhile, IC1_H pin exports the high level in 1 cycle, through C24, Q8 conducting, supply voltage VCC is through L1, D16, L2, Q8 forms loop, upper electric coil adhesive, keeping coil adhesive, S2, S3 closes, output (Lo, No, Eo) controlled source exports (this process hereinafter referred: controlled source exports);
2. power failure tripping function
The leakage that controlled source exports protects device when meeting mains failure or socket phase shortage or loose contact, IC1 cannot obtain electricity, IC1_I pin is without high level output, 1 all after date Q7 ends, and keeping coil discharges without electricity, drives tripping mechanism to make S2, S3 closing contact disconnects, output (Lo, No, Eo) exports without power supply;
3. water outlet power down function
Be in the leakage guarantor device that controlled source exports, when J1 (external water flow switch) is closed, when IC1_M pin detects low level, Single-chip Controlling IC1_I pin is without high level output, and 1 all after date Q7 ends, and keeping coil discharges without electricity, tripping mechanism is driven to make S2, S3 closing contact disconnects, output (Lo, No, Eo) export without power supply, achieve water outlet power down function, under this functional mode, any operation all can not make electric coil adhesive, output (Lo, No, Eo) be in pressure off-state, guarantee use safety;
4. non-effective earthing intelligence switching control function
Be in the leakage guarantor device that controlled source exports, be attempted by E-N end measure loop parts (E end voltage through C2, D8 voltage-stabiliser tube, U1 optocoupler, the abnormal indicator light of LED1 ground wire, protection diode D1 to N forms loop), optocoupler U1 conducting, IC1_A pin calculates E-N terminal voltage according to current derivation degree and after temporary memory, IC1_B pin exports 0.5S high level, through R16, the conducting of U2 optocoupler, because U2 output is attempted by D8 voltage stabilizing didoe two ends, conducting internal resistance because of U2 reduces the optocoupler U1 conducting degree causing being serially connected in E-N loop and increases, thus cause IC1_A terminal voltage to decline, single-chip microcomputer judges after calculating Δ V variable quantity that the magnitude of voltage that E-N holds and E hold ground connection situation. wherein: when ground wire E holds open circuit: Δ V=0, systematic evaluation to ground wire protected mode is: current mode is protected,
When E-N short circuit: Δ V=0, systematic evaluation to ground wire protected mode is: current mode is protected;
When E-L short circuit: Δ V=0, systematic evaluation to ground wire protected mode is: current mode is protected;
When ground wire E end in contact is bad: Δ V< single-chip microcomputer IC preset value, systematic evaluation to ground wire protected mode is: current mode is protected;
When L-N error-polarity connection, be equivalent to E-L=220V, now Δ V>> single-chip microcomputer IC preset value, systematic evaluation to ground wire protected mode is: current mode is protected;
When polarity is correct, ground wire effective grounding, E-N holds < single-chip microcomputer IC preset value, and now Δ V variable quantity is within the scope of systemic presupposition, and systematic evaluation to ground wire protected mode is: voltage-type is protected;
5. zero-sequence mutual inductance coil self-checking function
Be in the leakage guarantor device that controlled source exports, every 48 hours (install beforehand At All Other Times), IC1_O pin exported the high level in 2 cycles, Q4 conducting, now VCC voltage is through R23, ZCT1 auxiliary winding 3, 4 pin, loop is formed with Q4, ZCT1_1, 2 feels should export, U5_7 pin exports high level, through D12, R26, send into IC1_E pin, if IC1_E pin detects high level, think that zero-sequenceprotection loop is normal, otherwise, IC1_I pin is without high level output, 1 all after date Q7 ends, keeping coil discharges without electricity, tripping mechanism is driven to make S2, S3 closing contact disconnects, output (Lo, No, Eo) export without power supply,
6. failure code prompt facility
Device is protected in the leakage being in controlled source output, and when there is earth leakage protective, IC1_G exports the earth leakage protective instruction that periodic intervals flicker driving LED 3 causes to show the different reason of differentiation, and the different flashing times of its reason is different;
7. leak electricity sound and light of alarm
During any fault, IC1_L pin exports prompt tone control signal and drives Q1 conducting, and LS1 chimes of doom exports;
8. load zero, phase line earth leakage protective
Be in the leakage guarantor device that controlled source exports, when detecting that zero sequence has leakage current, ZCT1_1,2 feels should output signal sends into U5, U5_7 pin exports high level and sends into IC1_E pin, and IC1_I pin pin is without high level output, and 1 all after date Q7 ends, keeping coil discharges without electricity, drive tripping mechanism to make S2, S3 closing contact disconnects, output (Lo, No, Eo) export without power supply;
9. earth wire charged protecting (E end/voltage-type automatically switches into current mode)
Be in the leakage guarantor device that controlled source exports, ground wire E electrified voltage is through C2, D8 voltage stabilizing didoe, U1 (optocoupler), LED1, protection diode D1 and N end forms loop, when E-N end band electric strength reaches preset value, optocoupler U1 conducting causes IC1_A pin level descending system to judge, and whether current E-N end is less than 50V (other value of install beforehand), if then judge IC1_F pin whether >30mA (other value of install beforehand) again, then protect when both all meet, otherwise be in current working mode or self adaptation mode of operation;
10. earth wire charged protecting (E end/current mode automatically switches into voltage-type)
Be in the leakage guarantor device that controlled source exports, the charged electric current of ground wire E through ZCT2 mutual inductor to Eo, mutual inductor induction output voltage arranges C18 filtering through D14, rear feeding IC1_F pin, when IC1_F pin detects that ground wire leakage current then judges whether E-N terminal voltage is greater than 50V when reaching 30mA again, if then IC1_I pin is without high level output, 1 all after date Q7 ends, keeping coil discharges without electricity, tripping mechanism is driven to make S2, S3 closing contact disconnects, output (Lo, No, Eo) export without powering (hereinafter referred to as: protect immediately), otherwise be in voltage mode work or self adaptation mode of operation,
11. automatically lock current mode leaks guarantor's mode of operation
Be in the leakage guarantor device that controlled source exports, when inputting E-N terminal voltage >50V, optocoupler U1 conducting heighten degree, IC1_A pin detects that Δ V variable quantity exceeds the then lock current type work of single-chip microcomputer IC preset value;
12. input zero live wires contrary (or L, E short circuit), ground wire is electrization protection simultaneously
If input zero live wire is contrary or input L and E holds direct short circuit or the direct short circuit of N-E, quit work because of U1 optocoupler no-voltage difference under this pattern, systems axiol-ogy utilizes IC1_B pin to export test level, make the raw level change of IC1_A human hair combing waste, if during time unchanged or lower than default Δ V variable quantity, show to there is above-mentioned exception, system automatically switches into current mode protected mode; Simultaneity factor utilizes E-Ee (body of wall) directly voltage difference judgement, when E-Ee terminal voltage >50V (other value predeterminable), E terminal voltage is through C4, voltage-stabiliser tube, U3 optocoupler, protection diode D2 and Ee body of wall form loop, the conducting of U3 optocoupler, IC1_C pin level is caused to change, system utilizes Δ V variable quantity to calculate E-Ee voltage difference, detects protected mode when E-Ee>50V (other value of install beforehand) then switches to ground line current type immediately;
13. ground wire electrification >50V (other threshold values of install beforehand), indicator light flicker instruction
When E-N terminal voltage or E-Ee terminal voltage > preset value, optocoupler U1 or U3 conducting cause IC1_A or IC1_C level to decline and change, system utilizes Δ V variable quantity to calculate E-N or E-Ee voltage difference, when calculating voltage >50V, IC1_G pin output gap shorting voltage driving LED 3 flicker instruction, to cause the abnormal charged warning function of ground wire;
14. protector plug overtemperature protes
Be in the leakage guarantor device that controlled source exports, when overtemperature protection device detects that protector plug temperature reaches preset temperature, deliver to IC1_J pin through R24, RT1, R9 dividing potential drop, if the continuous 10S of system detects the high level of IC1_J pin, hard stop is protected.
It is pointed out that the above-mentioned description to components and parts adopts the mode of writing a Chinese character in simplified form, such as R represents resistance, and C represents electric capacity, by that analogy.
The present invention has following beneficial effect
1. the intelligent leakage protector that automatically powers on is the shortcoming and the potential safety hazard design that overcome existing all earth leakage protective devices, and be the earth leakage protective device of the omnibearing protection type that long-pending all functions are integrated, intelligent and safe is reliable;
2. water outlet power-off, accomplishes water power isolation result of use, does not have use safety hidden danger;
3. overcome the exception that all charged and wiring error of ground wire etc. is brought, system all can effectively recognition detection and control;
4. solve the circut breaking that do not trip during traditional earth leakage protective device switch control rule, stopped potential safety hazard and improve energy-saving effect, for a long time need not direct closing control switch;
5. crucial protective loop adds self-checking function, has stopped potential fail safe hidden danger.
Embodiment two
The present embodiment is substantially identical with mode with embodiment one implementation procedure, and difference is:
Voltage-stabiliser tube D8, D9 of embodiment one replace with triode D8, D9; Controllable silicon Q7, Q8 can use field effect transistor Q8, Q9 to substitute, and make suitable amendment to its peripheral circuit, and do not do too much repeating at this, physical circuit schematic diagram is see Fig. 2.
Embodiment three
The present embodiment is substantially identical with mode with embodiment one implementation procedure, and difference is:
Diode D16 connects with keeping coil L1, and a keeping coil L1 storage capacitor C25 in parallel, for keeping coil L1 provides stable energy, prevents keeping coil L1 from producing noise.Physical circuit schematic diagram is see Fig. 3.
Below be only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the intelligent leakage protector that automatically powers on, comprise live wire, zero line, ground wire, release, regulator rectifier circuit, amplifying circuit, the zero-sequence transformer be connected with amplifying circuit and ground wire instrument transformer, it is characterized in that: also comprise optocoupler U1, optocoupler U2, optocoupler U3 and single-chip microcomputer IC1; Pin 2 and the zero line of described optocoupler U1 are electrically connected, and the pin 1 of optocoupler U1 connects the pin 4 of described optocoupler U2, and described optocoupler U1 pin 4 connects the A pin of single-chip microcomputer IC1, and the pin 3 of optocoupler U1 connects the pin 2 of optocoupler U2; The pin 1 of described optocoupler U2 connects the B pin of single-chip microcomputer IC1, and pin 2 and the ground wire of described optocoupler U2 are electrically connected; Be provided with voltage-stabiliser tube D9 between the pin 1 of described optocoupler U3 and ground wire, pin 3 ground connection of described optocoupler U3, the pin 4 of optocoupler U3 connects the C pin of single-chip microcomputer; Ground wire instrument transformer is used for ground line current and detects, and its output is connected with single-chip microcomputer IC1;
Wherein, when optocoupler U1 conducting, the A pin of single-chip microcomputer IC1 calculates the voltage between ground wire-zero line, and after temporary memory, the B pin of single-chip microcomputer IC1 exports high level, makes optocoupler U2 conducting, cause the A pin voltage drop of single-chip microcomputer IC1, single-chip microcomputer calculates A pin voltage change △ V, makes the following judgment:
When ground terminal is opened a way: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When ground wire-zero line short circuit: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When the mutually trans-earth short of zero line live wire: Δ V=0, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
During local line end loose contact: Δ V< single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode;
When live wire-zero line error-polarity connection, now Δ V>> single-chip microcomputer IC preset value, single-chip microcomputer IC1 carries out ground line current detection by ground wire instrument transformer, and namely systematic evaluation is to current mode protected mode.
2. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: be also provided with ground wire electrification indicator light LED1 between described zero line and optocoupler U1.
3. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: be also provided with voltage-stabiliser tube D8 between 3 pin of described optocoupler U2 and 4 pin.
4. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: be also provided with voltage-stabiliser tube D9 between described ground wire and optocoupler U3, is also connected with protection diode D2 between described voltage-stabiliser tube D9 and body of wall line.
5. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: described single-chip microcomputer IC1 is also connected with water flow switch J1.
6. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: described release is also provided with keeping coil L1.
7. the intelligent leakage protector that automatically powers on according to claim 6, it is characterized in that: this circuit is also provided with controllable silicon Q7 and controllable silicon Q8, described controllable silicon Q7 is for controlling keeping coil L1; Trigger electrode and the controllable silicon Q8 trigger electrode of described controllable silicon Q7 are all controlled by single-chip microcomputer IC1, and described controllable silicon Q8 is for controlling the break-make of power supply.
8. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: described zero-sequence mutual inductance coil carries out self-inspection by single-chip microcomputer IC1.
9. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: this circuit is also provided with high-temperature protection circuit and warning device.
10. the intelligent leakage protector that automatically powers on according to claim 1, is characterized in that: described single-chip microcomputer IC preset value is the magnitude of voltage of a upper cycle pin A.
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| CN105207171A (en) * | 2015-09-21 | 2015-12-30 | 余姚市嘉荣电子电器有限公司 | Automatic power-on and power-off control circuit for electric leakage protector |
| CN105356409A (en) * | 2015-11-26 | 2016-02-24 | 余姚市嘉荣电子电器有限公司 | Automatic electrifying circuit for earth leakage protection apparatus |
| CN105680408A (en) * | 2016-03-17 | 2016-06-15 | 余姚市嘉荣电子电器有限公司 | Abutting circuit of water flow sensor |
| CN105896465A (en) * | 2015-09-28 | 2016-08-24 | 余姚市嘉荣电子电器有限公司 | Three-pole leakage protector and working method thereof |
| CN106207967A (en) * | 2016-08-08 | 2016-12-07 | 余姚市嘉荣电子电器有限公司 | One can put break-make type water outlet power-off leakage non-electricity protector |
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| CN107086542A (en) * | 2017-05-25 | 2017-08-22 | 乐清市诚富电器科技有限公司 | Fully-automatic intelligent switch type control circuit of earth leakage and its method |
| CN109066580A (en) * | 2018-07-20 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe earth leakage protective device |
| CN109149507A (en) * | 2018-07-20 | 2019-01-04 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device self checking method |
| CN109818332A (en) * | 2019-02-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device having ground wire missing protection |
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| CN107086542A (en) * | 2017-05-25 | 2017-08-22 | 乐清市诚富电器科技有限公司 | Fully-automatic intelligent switch type control circuit of earth leakage and its method |
| CN109066580A (en) * | 2018-07-20 | 2018-12-21 | 余姚市嘉荣电子电器有限公司 | A kind of safe earth leakage protective device |
| CN109149507A (en) * | 2018-07-20 | 2019-01-04 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device self checking method |
| CN109818332A (en) * | 2019-02-19 | 2019-05-28 | 余姚市嘉荣电子电器有限公司 | A kind of earth leakage protective device having ground wire missing protection |
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