CN104795789B - A kind of automatic monitoring circuit of earth fault earth leakage protective device - Google Patents
A kind of automatic monitoring circuit of earth fault earth leakage protective device Download PDFInfo
- Publication number
- CN104795789B CN104795789B CN201510124922.8A CN201510124922A CN104795789B CN 104795789 B CN104795789 B CN 104795789B CN 201510124922 A CN201510124922 A CN 201510124922A CN 104795789 B CN104795789 B CN 104795789B
- Authority
- CN
- China
- Prior art keywords
- circuit
- triggering
- protective device
- voltage
- automatic monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of automatic monitoring circuit for the earth fault earth leakage protective device for possessing automatic monitoring function, described earth fault earth leakage protective device includes：Rectification circuit, electric-leakage detection circuit, tripping coil and dropout diode and tripping coil control circuit, described automatic monitoring circuit include：Simulation electric leakage output circuit, indicator lamp, pilot lamp power, electric-leakage detection circuit, energization triggers circuit, trigger turn-off circuit and circulation triggers circuit, described circulation triggers circuit include：The triggering electric capacity being connected with the triggering end of indicating lamp control circuit and the unlatching triggering charging circuit charged to the triggering electric capacity and the termination discharged to the triggering electric capacity trigger discharge circuit.The automatic monitoring circuit of the earth fault earth leakage protective device can be widely used in the electrical equipment of the various use alternating currents such as power outlet.
Description
Technical field
The present invention relates to a kind of earth fault earth leakage protective device, and in particular to a kind of earth fault earth leakage protective device
Automatic monitoring circuit.
Background technology
At present, the electrical equipment such as the power outlet in the outlet U.S. need to meet the UL943A.5.16.2 clauses implemented for 2015
In regulation, be that GFCI (Ground Fault Circuit Interrupter) routinely connects in earth fault earth leakage protective device
Under conditions of line (non-reverse wiring), during GFCI power supply terminal alternate energisations, earth fault earth leakage protective device need to possess automatic monitoring
Function, so-called automatic monitoring function includes：Start in power supply or face terminals are powered 5 seconds and repeated at least 3 hours
Automatic detection is once.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of earth fault earth leakage protective for possessing automatic monitoring function
The automatic monitoring circuit of device.
In order to solve the above technical problems, the technical solution adopted by the present invention is：A kind of earth fault earth leakage protective device from
Dynamic observation circuit, described earth fault earth leakage protective device includes：Rectification circuit, electric-leakage detection circuit, tripping coil, dropout
Diode is with for controlling the tripping coil whether tripping coil is connected to control circuit, and one end access of tripping coil is leaked with true
Electric signal is with the AC input lines of phase, and the other end of tripping coil is connected with the respective end of dropout diode, dropout diode
The other end controls the respective end of circuit to be connected with tripping coil, the ground wire of another termination rectification circuit of tripping coil control circuit
I.e. direct current, when electric-leakage detection circuit detects leakage current, exports electric leakage signal, when tripping coil controls circuit by truly leaking
When electric signal drives, tripping coil drives corresponding tripping mechanism action；Described automatic monitoring circuit includes：
Simulation electric leakage output circuit, its output phase differs the simulation electrical leakage voltage of 180 degree with true electric leakage signal；
Indicator lamp, for indicating whether the work of earth fault earth leakage protective device and automatic monitoring circuit is normal；
Pilot lamp power, it provides operating voltage to indicator lamp, while providing trigger voltage for simulation electric leakage output circuit；
Indicating lamp control circuit, it controls whether indicator lamp is connected, while whether it also controls simulation electric leakage output circuit
Connect；
Energization triggers circuit, it is when earth fault earth leakage protective device is powered, and the triggering end to indicating lamp control circuit is carried
For trigger voltage；
Trigger turn-off circuit, it is cancelled in the setting time after earth fault earth leakage protective device is powered and is added in indicator lamp
Control the trigger voltage in the triggering end of circuit；
Circulate triggers circuit, its setting circulation time then, provide triggering for the triggering end of indicating lamp control circuit
Voltage, lights indicator lamp, then, and indicator lamp control electricity is cancelled in the presence of the simulation electric leakage signal that electric-leakage detection circuit is exported
The trigger voltage of the triggering end on road, extinguishes indicator lamp, again waits for described circulation time, so circulation.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described indicator lamp
Control circuit includes：Indicator lamp controls the triggering threshold of adjustable voltage stabilizer and a voltage threshold for improving trigger signal steady
Pressure pipe so that the triggering of indicating lamp control circuit is more stablized.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described energization is touched
Power Generation Road includes：One energization more than the trigger voltage of indicating lamp control circuit triggers half-wave mu balanced circuit, is arranged on energization
It is unidirectional tactile between triggering threshold voltage-stabiliser tube in the output end of triggering half-wave mu balanced circuit and described indicating lamp control circuit
Send out diode.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described triggering is closed
Deenergizing includes：Charging and voltage stabilizing electric capacity, triggering turn off adjustable voltage stabilizer and are connected with the control pole of triggering shut-off adjustable voltage stabilizer
Shut-off charging and voltage stabilizing circuit.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described shut-off is filled
Electric mu balanced circuit includes shut-off charging current limiter resistance and shut-off threshold voltage-stabiliser tube, turns off one end and the shut-off of charging current limiter resistance
The negative electrode of threshold voltage-stabiliser tube is connected, and the other end of shut-off charging current limiter resistance is connected with the negative electrode of dropout diode, turns off threshold
The anode of voltage-stabiliser tube is connected with the control pole of triggering shut-off adjustable voltage stabilizer.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described circulation is touched
Power Generation Road includes：The triggering electric capacity being connected with the triggering end of indicating lamp control circuit and the unlatching charged to the triggering electric capacity are touched
The termination sent out charging circuit and discharged to the triggering electric capacity triggers discharge circuit, terminates triggering discharge circuit and is leaked by described simulation
Electric signal is triggered.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described unlatching is touched
Hair charging circuit includes：Open triggering mu balanced circuit and open triggering charging current limiter resistance, unlatching triggering mu balanced circuit is with closing
Disconnected charging and voltage stabilizing circuit multiplexer, one end for opening triggering charging current limiter resistance is connected with turning off the negative electrode of threshold voltage-stabiliser tube, opens
The other end for triggering charging current limiter resistance is connected with triggering the respective end of electric capacity.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described termination is touched
Hair discharge circuit includes：The tripping coil control circuit and string of multiplexing are located at tripping coil control circuit and described triggering electricity
Unidirected discharge diode between appearance, is provided with triggering steady between the triggering end of tripping coil control circuit and described direct current ground
Voltage capacitance.
Preferably, in the automatic monitoring circuit of described earth fault earth leakage protective device, described rectified current
Road is full bridge rectifier.
The beneficial effects of the invention are as follows：The present invention differs the mould of 180 degree by producing phase with true electric leakage signal phase
Intend electrical leakage voltage so that the corresponding of dropout diode can be commonly connected to opening triggering charging circuit by terminating triggering discharge circuit
End, is realized in setting time interior circulation automatic detection, and energization triggers circuit and trigger turn-off circuit can ensure that and lead in power supply
Automatic detection in 5 seconds of electricity, the automatic monitoring circuit for so allowing for whole earth fault earth leakage protective device possesses automatic prison
Brake.In addition, the present invention also controls the multiplexing of circuit to realize that circulation is automatic by indicating lamp control circuit and tripping coil
Function is detected, circuit is enormously simplify, reduces manufacturing cost.
Brief description of the drawings
Fig. 1 is the electric theory structure schematic diagram of the present invention.
Reference in Fig. 1 is：1st, detection of electrical leakage chip, 2, pilot lamp power, 3, indicating lamp control circuit, 4, be powered
Triggers circuit, 5, trigger turn-off circuit, 61, open triggering charging circuit, 62, terminate triggering discharge circuit, 7, simulation electric leakage it is defeated
Go out circuit；
DB1, full bridge rectifier, G1, controllable silicon, LED2, indicator lamp, T1, tripping coil, D1, dropout diode, D2,
Unidirectional diac, D3, unidirected discharge diode, D7, diode, ZD1, shut-off threshold voltage-stabiliser tube, ZD2, triggering threshold are steady
Pressure pipe, ZD3, voltage-stabiliser tube, ZD4, voltage-stabiliser tube, R1, resistance, R2, unlatching triggering charging current limiter resistance, R3, shut-off charging current limiter electricity
Resistance, R5, resistance, R6, resistance, R7, resistance, R8, resistance, Q1, triggering shut-off adjustable voltage stabilizer, Q2, indicator lamp control adjustable steady
Depressor, Q3, triode, C1, charging and voltage stabilizing electric capacity, C3, electric capacity, C4, triggering electric capacity, C5, triggering electric capacity of voltage regulation, C6, electric capacity.
Embodiment
Below in conjunction with the accompanying drawings, a kind of automatic monitoring circuit of earth fault earth leakage protective device of the present invention is described in detail
Specific embodiment：
As shown in figure 1, a kind of automatic monitoring circuit of earth fault earth leakage protective device (GFCI) of the present invention, is used for
The described earth fault earth leakage protective device of automatic monitoring can normal work whether the life-span terminates in other words, earth fault electric leakage
Protector includes：It is the full bridge rectifier DB1 that is made up of 4 commutation diodes, main by detection of electrical leakage chip 1 and its periphery
Electric-leakage detection circuit, tripping coil T1, the dropout diode of circuit (belong to and be not drawn into the conventional techniques of this area, figure) composition
D1 and the controllable silicon G1 that circuit is controlled as tripping coil for controlling tripping coil T1 whether to connect, controllable silicon G1 negative electrode
Gone back between anode and be connected to the piezo-resistance for protecting controllable silicon G1, full bridge rectifier DB1 positive pole passes through one
15K0.25W resistance R1 is connected to the power end of detection of electrical leakage chip 1, and one end of the tripping coil T1 is generally with exchanging input
Live wire L be connected, the tripping coil T1 other end is connected with dropout diode D1 positive pole, dropout diode D1 negative pole with it is controllable
Silicon G1 anode is connected, controllable silicon G1 negative electrode and full bridge rectifier DB1 ground wire be direct current be connected, controllable silicon G1 control
Pole processed is connected with the electric leakage signal output end of detection of electrical leakage chip 1, when detection of electrical leakage chip 1 detects electric leakage signal, either
When simulation in true electric leakage or alternating current zero line N on alternating current fire wire L is leaked electricity, electric leakage signal is exported, when the electric leakage
When signal is true electric leakage signal, controllable silicon G1 is turned on, the electric current flowed through in tripping coil T1, it is sufficient to drive tripping mechanism (logical
It is often ferromagnetic iron) action, trip action is completed, i.e.,：Cut off the connection between alternating current and corresponding electrical equipment；
Described automatic monitoring circuit includes：Simulation electric leakage output circuit 7, indicator lamp LED2, pilot lamp power 2, instruction
Lamp control circuit 3, energization triggers circuit 4, trigger turn-off circuit 5 and circulation triggers circuit, simulation electric leakage output circuit 7 include：
Diode D7, resistance R5 and R6, triode Q3, in order to produce simulation electric leakage signal, generally by through for sensing the magnetic leaked electricity
Zero line after ring is that zero line N1 is connected with diode D7 positive pole, so when indicating lamp control circuit 3 is opened, and just forms phase
The simulation leakage current of 180 degree is differed with true electric leakage signal, detection of electrical leakage chip 1 carries out differential amplification to this electric leakage signal,
Output simulation electric leakage signal；Described indicator lamp LED2, for indicating earth fault earth leakage protective device and automatic monitoring circuit
Whether work is normal, and described pilot lamp power 2 is 12 volts of half-wave mu balanced circuit, including：100K resistance R7,12V voltage-stabiliser tubes
ZD3 and 10UF electric capacity C3, while pilot lamp power 2 provides operating voltage to indicator lamp LED2, also leak electricity for described simulation
The base stage of triode Q3 in output circuit 7 provides trigger voltage；Described indicating lamp control circuit 3 includes：Model TL431
Indicator lamp control adjustable voltage stabilizer Q2 and for triggering threshold voltage-stabiliser tube ZD2 (these for the voltage threshold for improving trigger signal
In use 8.3 volts of voltage-stabiliser tubes), whether indicator lamp control adjustable voltage stabilizer Q2 turns on and controls whether indicator lamp LED2 connects
It is logical, while also control whether simulation electric leakage output circuit 7 is connected；Described energization triggers circuit 4, including：Be powered triggering half
Ripple mu balanced circuit and the triggering threshold being arranged in energization triggering half-wave mu balanced circuit and described indicating lamp control circuit 3
Unidirectional diac D2 between voltage-stabiliser tube ZD2, the voltage of energization triggering half-wave mu balanced circuit output is 12 volts, more than finger
Show trigger voltage (the indicator lamp control adjustable voltage stabilizer Q2 trigger voltage 2.5 volts+triggering threshold voltage-stabiliser tube of lamp control circuit 3
8.3 volts=10.8 volts of ZD2 pressure drop), described energization triggering half-wave mu balanced circuit includes：100K resistance R8,12V voltage-stabiliser tubes
ZD4 and 10UF electric capacity C6, described energization triggers circuit 4 passes through indicator lamp control when earth fault earth leakage protective device is powered
The triggering end of circuit 3 is that the negative electrode for triggering threshold voltage-stabiliser tube ZD2 controls adjustable voltage stabilizer Q2 control pole to provide tactile to indicator lamp
Generate electricity pressure so that indicator lamp control adjustable voltage stabilizer Q2 conductings；Described trigger turn-off circuit 5, including：Charging and voltage stabilizing electric capacity
C1, model TL431 triggering shut-off adjustable voltage stabilizer Q1 and the pass that trigger voltage is provided for triggering shut-off adjustable voltage stabilizer Q1
Disconnected charging and voltage stabilizing circuit and the dropout diode D1 and tripping coil T1 being multiplexed with earth fault earth leakage protective device, described pass
Disconnected charging and voltage stabilizing circuit includes：Turn off charging current limiter resistance R3 and shut-off threshold voltage-stabiliser tube ZD1, shut-off threshold voltage-stabiliser tube ZD1
For the voltage-stabiliser tube (voltage-stabiliser tube for using 18V here) of the output voltage more than the triggering half-wave mu balanced circuit that is powered, triggering is closed
With connecing direct current, triggering turns off adjustable voltage stabilizer Q1 negative electrode and the triggering half-wave mu balanced circuit that is powered to disconnected adjustable voltage stabilizer Q1 anode
Output end be connected, triggering shut-off adjustable voltage stabilizer Q1 control pole is connected with shut-off threshold voltage-stabiliser tube ZD1 anode, shutoff door
Sill voltage-stabiliser tube ZD1 negative electrode and charging and voltage stabilizing electric capacity C1 positive pole are connected with turning off charging current limiter resistance R3 one end, turn off
The charging current limiter resistance R3 other end is connected with dropout diode D1 negative electrode, charging and voltage stabilizing electric capacity C1 negative pole with connecing direct current,
Setting time (regulation in UL943A.5.16.2 clause of the trigger turn-off circuit 5 after the energization of earth fault earth leakage protective device
5 seconds) in, it is ensured that charging and voltage stabilizing electric capacity C1 charges to 20.5V or so so that triggering shut-off adjustable voltage stabilizer Q1 conducting, will be logical
The output voltage of electricity triggering half-wave mu balanced circuit is dragged down, to cancel the triggering being added in the triggering end of indicating lamp control circuit 3 electricity
Pressure so that indicator lamp control adjustable voltage stabilizer Q2 cut-offs；Described circulation triggers circuit, including：With indicating lamp control circuit 3
Triggering end is the connected triggering electric capacity C4 of negative electrode for triggering threshold voltage-stabiliser tube ZD2 and the unlatching charged to triggering electric capacity C4
The termination for triggering charging circuit 61 and being discharged to triggering electric capacity C4 triggers discharge circuit 62, described unlatching triggering charging circuit
61 include：Open triggering mu balanced circuit and open triggering charging current limiter resistance R2, unlatching triggering mu balanced circuit charges with shut-off
Mu balanced circuit is multiplexed, and the one end for opening triggering charging current limiter resistance R2 is connected with turning off threshold voltage-stabiliser tube ZD1 negative electrode, opens and touches
The hair charging current limiter resistance R2 other end is connected with triggering electric capacity C4 respective end；Described termination triggering discharge circuit 62 is wrapped
Include：The tripping coil control circuit being multiplexed with earth fault earth leakage protective device is that controllable silicon G1 and string are located at controllable silicon G1 and institute
Unidirected discharge diode D3 between the triggering electric capacity C4 stated, is provided between controllable silicon G1 control pole and described direct current ground
Trigger electric capacity of voltage regulation C5.
The operation principle of earth fault earth leakage protective device of the present invention is：
When leakage current is more than 6mA, detection of electrical leakage chip 1 carries out differential amplification to this electric leakage signal, output high level
Trigger signal, drives controllable silicon G1, controllable silicon G1 to be opened so that tripping coil T1 obtains electric current, produces magnetic field force, promotes and threads off
Iron core motion in coil T1, completes trip action；This principle is also applied for detection of electrical leakage, when Pen-down detection button, produces
Leakage current is more than 6mA, and detection of electrical leakage chip 1 carries out differential amplification to this electric leakage signal, exports the trigger signal of high level, driving
Controllable silicon G1, controllable silicon G1 is opened so that tripping coil T1 obtains electric current, produces magnetic field force, promotes the iron in tripping coil T1
Core is moved, and iron core drives lock pin and the back-moving spring motion of reset system, completes detection of electrical leakage.
The operation principle of automatic monitoring circuit of the present invention is：It was powered, the triggering half-wave mu balanced circuit that is powered passes through
Unidirectional diac D2 directly allows triggering electric capacity C4 and triggering threshold voltage-stabiliser tube ZD2 connection end to be in about 11.3V height electricity
Position so that indicator lamp control adjustable voltage stabilizer Q2 conducting, indicator lamp LED2 is lighted, at the same time, by triode Q3, resistance R5 and
The simulation electric leakage output circuit 7 of R6, diode D7 composition starts, and alternating current fire wire (also referred to as phase line) L passes through tripping coil T1, taken off
Button diode D1 and shut-off charging current limiter resistance R3 charge to charging and voltage stabilizing electric capacity C1, are charged by the suitable shut-off of selection
Current-limiting resistance R3 charging and voltage stabilizing electric capacity C1, it is ensured that in 5 seconds, allows charging and voltage stabilizing electric capacity C1 current potential to rise to 20.5V or so,
So that triggering shut-off adjustable voltage stabilizer Q1 conductings, the output voltage for the triggering half-wave mu balanced circuit that is powered is dragged down, thus cancelled
It is added in the trigger voltage in the triggering end of indicating lamp control circuit 3, indicator lamp control adjustable voltage stabilizer Q2 cut-offs；If GFCI
Circuit normal work, when triggering electric capacity C4 charges to indicator lamp control adjustable voltage stabilizer Q2 conductings, the simulation electric leakage He of output circuit 7
Indicator lamp LED2 is turned on, and detection of electrical leakage chip 1 produces simulation leakage trigger signal, removes driving controllable silicon G1 so that controllable silicon
G1 is turned on, so, and triggering electric capacity C4 passes through unidirected discharge diode D3, is discharged by controllable silicon G1, and indicator lamp controls adjustable voltage stabilizing
Device Q2 control pole (3 pin) voltage is pulled low, and indicator lamp control adjustable voltage stabilizer Q2 cut-offs, indicator lamp LED2 extinguishes, above mistake
Journey shows as that indicator lamp LED2 is glittering once, realizes the function of self-inspection in 5 seconds after GFCI is powered.Because triggering shut-off is adjustable steady
After depressor Q1 conductings, triggering shut-off adjustable voltage stabilizer Q1 1 pin is always maintained at low level so that self-inspection will not circulate generation, directly
It is once again powered up after to GFCI power-off.
Such as, and when GFCI circuit occurs abnormal, tripping coil T1 or dropout diode D1 disconnect, triggering shut-off is adjustable
Voltage-stablizer Q1 control pole cannot get trigger voltage, and triggering shut-off adjustable voltage stabilizer Q1 can not be turned on, and triggering electric capacity C4 is all the time
High potential, indicator lamp control adjustable voltage stabilizer Q2 is in opening state, indicator lamp LED2 often bright alarms all the time；Or, work as full-bridge
When rectification circuit DB1 or resistance R1 break down, detection of electrical leakage chip 1 is produced without leakage trigger signal, and controllable silicon G1 is open-minded
Not, triggering electric capacity C4 can not discharge, and indicator lamp control adjustable voltage stabilizer Q2 3 pin voltages meet the condition of opening all the time, indicate
Lamp LED2 often bright alarms；Or the simulation electric leakage output circuit 7 of the element such as triode Q3, diode D7 composition breaks down, and leaks
The differential amplifier of electro-detection chip 1 does not have electric leakage signal input, and detection of electrical leakage chip 1 is also just defeated without leakage trigger signal
Go out, controllable silicon G1 is in cut-off state all the time, triggering electric capacity C4 does not put electricity equally, and indicator lamp controls adjustable voltage stabilizer Q2 because of it
Control pole (3 pin) meets and opens condition and turn on all the time, indicator lamp LED2 often bright alarms.
Complete after GFCI is powered in 5 seconds after self-inspection, into end-of-life self-inspection (in 3 hours self-inspection once), alternating current
Live wire L passes through tripping coil T1, dropout diode D1, shut-off charging current limiter resistance R3 and charging and voltage stabilizing electric capacity C1 and shutoff door
After sill voltage-stabiliser tube ZD1 voltage stabilizings, triggering electric capacity C4 is charged by opening triggering charging current limiter resistance R2, it is suitable by selection
Unlatching triggering charging current limiter resistance R2 and triggering electric capacity C4, triggering electric capacity C4 is charged to and is met indicator lamp and control adjustable voltage stabilizing
The device Q2 time for opening condition is normally controlled in 30 minutes or so, after indicator lamp control adjustable voltage stabilizer Q2 is opened, indicator lamp
LED2 is lighted.In the case of GFCI circuit normal work, the mould being made up of resistance R5 and R6, triode Q3 and diode D7 etc.
Intend electric leakage output circuit 7 to start, then controllable silicon G1 obtains trigger signal and turned on, triggering electric capacity C4 passes through unidirected discharge diode
D3 and controllable silicon G1 electric discharges, the voltage of indicator lamp control adjustable voltage stabilizer Q2 control pole (3 pin) is pulled low so that indicator lamp control
Adjustable voltage stabilizer Q2 processed cut-off, indicator lamp LED2 extinguishes, and it is glittering once that above whole process shows as indicator lamp LED2, thus
Complete a self-checking function.Because indicator lamp control adjustable voltage stabilizer Q2 state is recycled, afterwards every 30 minutes
Circulate self-inspection once, it is ensured that repeatedly life-span self-inspection in 3 hours.When GFCI occurs abnormal, for example：Electric capacity C4 is triggered to break
Open, the voltage on shut-off threshold voltage-stabiliser tube ZD1 negative electrodes directly opens indicator lamp control by opening triggering charging current limiter resistance R2
Adjustable voltage stabilizer Q2, indicator lamp LED2 often bright alarm；If again：Tripping coil T1 or dropout diode D1 is damaged, then triggering is closed
Disconnected adjustable voltage stabilizer Q1 will not be opened, and indicator lamp control adjustable voltage stabilizer Q2 is turned on all the time, indicator lamp LED2 often bright alarms；It is again false
Such as resistance R5, triode Q3 and diode D7 the simulation electric leakage output circuit 7 constituted or full bridge rectifier DB1 or resistance R1 hairs
Raw failure, controllable silicon G1 can not be opened, and triggering electric capacity C4 can not discharge, and indicator lamp control adjustable voltage stabilizer Q2 is all the time in open-minded
State, indicator lamp LED2 often bright alarms.
When indicator lamp LED2 often bright alarms, exactly inform that user GFCI life-span has terminated the GFCI, it is necessary to more renew,
Ensure user's property and life security.Certainly, indicator lamp LED2 is not in GFCI after powered up in 5 seconds or afterwards 3 hours
Light, be due to caused by automatic monitoring circuit faults itself, it is necessary to which user changes automatic monitoring circuit.
In summary, only presently preferred embodiments of the present invention, not for limiting the scope that the present invention is implemented, it is all according to
The equivalent changes and modifications that shape, construction, feature and spirit described in scope of the invention as claimed are made, all should be included in this
In the right of invention.
Claims (9)
1. a kind of automatic monitoring circuit of earth fault earth leakage protective device, described earth fault earth leakage protective device includes：Rectification
Circuit, electric-leakage detection circuit, tripping coil, dropout diode and the tripping coil control for controlling tripping coil whether to connect
Circuit, one end access and AC input lines of the true electric leakage signal with phase, the other end of tripping coil and the dropout of tripping coil
The respective end of diode is connected, and the other end of dropout diode controls the respective end of circuit to be connected with tripping coil, tripping coil
The ground wire for controlling another termination rectification circuit of circuit is direct current, when electric-leakage detection circuit detects leakage current, output leakage
Electric signal, when tripping coil control circuit is driven by true electric leakage signal, tripping coil drives corresponding tripping mechanism action；
Characterized in that, described automatic monitoring circuit includes：
Simulation electric leakage output circuit, its output phase differs the simulation electrical leakage voltage of 180 degree with true electric leakage signal；
Indicator lamp, for indicating whether the work of earth fault earth leakage protective device and automatic monitoring circuit is normal；
Pilot lamp power, it provides operating voltage to indicator lamp, while providing trigger voltage for simulation electric leakage output circuit；
Indicating lamp control circuit, it controls whether indicator lamp is connected, while it also controls whether simulation electric leakage output circuit is connected；
Energization triggers circuit, it is when earth fault earth leakage protective device is powered, and the triggering end to indicating lamp control circuit, which is provided, to be touched
Generate electricity pressure；
Trigger turn-off circuit, it is cancelled in the setting time after earth fault earth leakage protective device is powered and is added in indicator lamp control
Trigger voltage in the triggering end of circuit；
Circulate triggers circuit, its setting circulation time then, provide trigger voltage for the triggering end of indicating lamp control circuit,
Indicator lamp is lighted, then, indicating lamp control circuit is cancelled in the presence of the simulation electric leakage signal that electric-leakage detection circuit is exported
The trigger voltage of triggering end, extinguishes indicator lamp, again waits for described circulation time, so circulation.
2. the automatic monitoring circuit of the earth fault earth leakage protective device according to claim 1, it is characterised in that described
Indicating lamp control circuit includes：Indicator lamp controls adjustable voltage stabilizer and a triggering for being used to improve the voltage threshold of trigger signal
Threshold voltage-stabiliser tube so that the triggering of indicating lamp control circuit is more stablized.
3. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 2, it is characterised in that described is logical
Electric triggers circuit includes：One energization more than the trigger voltage of indicating lamp control circuit triggers half-wave mu balanced circuit, is arranged on
The list between triggering threshold voltage-stabiliser tube in the output end of energization triggering half-wave mu balanced circuit and described indicating lamp control circuit
To diac.
4. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 2, it is characterised in that described touches
Hair breaking circuit includes：Charging and voltage stabilizing electric capacity, triggering shut-off adjustable voltage stabilizer and the control pole with triggering shut-off adjustable voltage stabilizer
Connected shut-off charging and voltage stabilizing circuit.
5. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 4, it is characterised in that described pass
Disconnected charging and voltage stabilizing circuit includes shut-off charging current limiter resistance and shut-off threshold voltage-stabiliser tube, turn off one end of charging current limiter resistance with
The negative electrode for turning off threshold voltage-stabiliser tube is connected, and the other end of shut-off charging current limiter resistance is connected with the negative electrode of dropout diode, turns off
The anode of threshold voltage-stabiliser tube is connected with the control pole of triggering shut-off adjustable voltage stabilizer.
6. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 5, it is characterised in that described follows
Ring triggers circuit includes：The triggering electric capacity being connected with the triggering end of indicating lamp control circuit and opening to triggering electric capacity charging
The termination opened triggering charging circuit and discharged to the triggering electric capacity triggers discharge circuit, terminates triggering discharge circuit by described mould
Intend electric leakage signal triggering.
7. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 6, it is characterised in that described opens
Opening triggering charging circuit includes：Open triggering mu balanced circuit and open triggering charging current limiter resistance, unlatching triggering mu balanced circuit
With shut-off charging and voltage stabilizing circuit multiplexer, the one end for opening triggering charging current limiter resistance is connected with turning off the negative electrode of threshold voltage-stabiliser tube,
The other end for opening triggering charging current limiter resistance is connected with triggering the respective end of electric capacity.
8. the automatic monitoring circuit of earth fault earth leakage protective device according to claim 6, it is characterised in that described end
Only triggering discharge circuit includes：The tripping coil control circuit and string of multiplexing are located at tripping coil control circuit and described touched
The unidirected discharge diode generated electricity between holding, is provided with tactile between the triggering end of tripping coil control circuit and described direct current ground
Send out electric capacity of voltage regulation.
9. the automatic monitoring circuit of earth fault earth leakage protective device according to any one of claim 1 to 8, its feature exists
In described rectification circuit is full bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124922.8A CN104795789B (en) | 2015-03-20 | 2015-03-20 | A kind of automatic monitoring circuit of earth fault earth leakage protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510124922.8A CN104795789B (en) | 2015-03-20 | 2015-03-20 | A kind of automatic monitoring circuit of earth fault earth leakage protective device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104795789A CN104795789A (en) | 2015-07-22 |
| CN104795789B true CN104795789B (en) | 2017-07-28 |
Family
ID=53560408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510124922.8A Active CN104795789B (en) | 2015-03-20 | 2015-03-20 | A kind of automatic monitoring circuit of earth fault earth leakage protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104795789B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108666972B (en) * | 2017-04-01 | 2024-04-19 | 苏州益而益电器制造有限公司 | Leakage protector |
| CN108736439B (en) * | 2018-07-20 | 2020-04-28 | 余姚市嘉荣电子电器有限公司 | Leakage protector |
| CN110190584B (en) | 2019-05-10 | 2020-04-24 | 浙江大学 | Self-checking chip of leakage protector |
| CN110165633A (en) * | 2019-05-15 | 2019-08-23 | 张家港市佰瑞普电器科技有限公司 | A kind of control circuit of ground fault earth leakage protective device and force tripping method |
| CN110297151B (en) * | 2019-05-24 | 2022-04-08 | 温州华亚电气有限公司 | Monitoring circuit protection circuit for operation fault of earth fault leakage protector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964148A (en) * | 2006-11-21 | 2007-05-16 | 陈景正 | An intelligent detection and protection circuit for termination of service life of ground fault breaker |
| CN101113998A (en) * | 2006-07-25 | 2008-01-30 | 黄华道 | Circuit for automatically detecting creepage protecting socket electrifying whether or not end of life |
| CN101295609A (en) * | 2007-04-24 | 2008-10-29 | 温州三蒙科技电气有限公司 | Circuit protection device for automatically monitoring operation disturbance |
| CN102306924A (en) * | 2011-09-14 | 2012-01-04 | 黄华道 | Leakage detecting protection circuit capable of periodically automatically detecting function integrity |
| CN102354869A (en) * | 2011-08-19 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug with alarm device |
| CN103208776A (en) * | 2013-01-23 | 2013-07-17 | 陈泽 | Breaker circuit with fault self-detection function |
| CN204464949U (en) * | 2015-03-20 | 2015-07-08 | 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6850394B2 (en) * | 2002-08-23 | 2005-02-01 | Cheil Electric Wiring Devices Co. | Apparatus and method for determining mis-wiring in a ground fault circuit interrupter |
| US9478971B2 (en) * | 2013-07-04 | 2016-10-25 | Tower Manufacturing Corporation | Power cord apparatus for remotely detecting excessive operational parameters in an electrically powered machine |
-
2015
- 2015-03-20 CN CN201510124922.8A patent/CN104795789B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101113998A (en) * | 2006-07-25 | 2008-01-30 | 黄华道 | Circuit for automatically detecting creepage protecting socket electrifying whether or not end of life |
| CN1964148A (en) * | 2006-11-21 | 2007-05-16 | 陈景正 | An intelligent detection and protection circuit for termination of service life of ground fault breaker |
| CN101295609A (en) * | 2007-04-24 | 2008-10-29 | 温州三蒙科技电气有限公司 | Circuit protection device for automatically monitoring operation disturbance |
| CN102354869A (en) * | 2011-08-19 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug with alarm device |
| CN102306924A (en) * | 2011-09-14 | 2012-01-04 | 黄华道 | Leakage detecting protection circuit capable of periodically automatically detecting function integrity |
| CN103208776A (en) * | 2013-01-23 | 2013-07-17 | 陈泽 | Breaker circuit with fault self-detection function |
| CN204464949U (en) * | 2015-03-20 | 2015-07-08 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104795789A (en) | 2015-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104795789B (en) | A kind of automatic monitoring circuit of earth fault earth leakage protective device | |
| CN104868443A (en) | Automatic power-on intelligent-type electric leakage protector | |
| CN106711938A (en) | Leakage protector | |
| CN204190188U (en) | Low-voltage intelligent protection distribution box | |
| CN107658646A (en) | A kind of multifunctional safe intelligent switch socket | |
| CN108134273A (en) | The safety electric outlet circuit of low pressure detection control | |
| CN108093523B (en) | The control circuit and power supply of AC dump and light modulation shutdown | |
| CN109001622A (en) | A kind of detection method of the external on-load switch of electric energy meter | |
| CN100561814C (en) | Protecting circuit for electrical equipment | |
| CN204464949U (en) | A kind of automatic monitoring circuit of earth fault earth leakage protective device | |
| CN103872643A (en) | Anti electric wall circuit for leakage protection switch and application of the same | |
| CN104269837B (en) | Pull out electrical protective device | |
| CN104377647B (en) | leakage protection circuit | |
| CN104600763B (en) | Under-voltage protecting circuit and lamps and lanterns | |
| CN107305230B (en) | Electricity consumption detection device | |
| CN206432694U (en) | Earth leakage protective device | |
| CN104868444B (en) | Intelligent wireless network type earth leakage protective device | |
| CN105759162A (en) | Power consumption detection device | |
| CN207459702U (en) | A kind of earth leakage protective device and a kind of charging equipment | |
| CN206684219U (en) | A kind of frequency converter and its voltage detecting circuit | |
| CN109755921A (en) | Ground-fault interrupter | |
| CN101359030A (en) | Earthing discrimination, monitor and alarm unit for electrical power system in substation | |
| CN205829135U (en) | With electric detection means and electric connecting device | |
| CN205646939U (en) | Electric bicycle intelligent charging manager | |
| CN205944642U (en) | Safety socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Gong Yiwan Inventor before: Wang Youfeng Inventor before: Zheng Xiaobo Inventor before: Chen Jiangang |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The people of East Zhangjiagang City Tangqiao town Suzhou City, Jiangsu province 215611 No. 29 Zhangjiagang City Bai Ruipu Electric Technology Co. Ltd. Patentee after: Jiangsu bairuipu Intelligent Technology Co., Ltd Address before: The people of East Zhangjiagang City Tangqiao town Suzhou City, Jiangsu province 215611 No. 29 Zhangjiagang City Bai Ruipu Electric Technology Co. Ltd. Patentee before: Zhangjagang City one hundred Rui Pu electrical equipment Science and Technology Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 215615 bairuipu, no.6, Xionghua Road, Tangqiao town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: Jiangsu bairuipu Intelligent Technology Co., Ltd Address before: The people of East Zhangjiagang City Tangqiao town Suzhou City, Jiangsu province 215611 No. 29 Zhangjiagang City Bai Ruipu Electric Technology Co. Ltd. Patentee before: Jiangsu bairuipu Intelligent Technology Co., Ltd |
|
| CP02 | Change in the address of a patent holder |