CN102306924A - Leakage detecting protection circuit capable of periodically automatically detecting function integrity - Google Patents
Leakage detecting protection circuit capable of periodically automatically detecting function integrity Download PDFInfo
- Publication number
- CN102306924A CN102306924A CN201110270316A CN201110270316A CN102306924A CN 102306924 A CN102306924 A CN 102306924A CN 201110270316 A CN201110270316 A CN 201110270316A CN 201110270316 A CN201110270316 A CN 201110270316A CN 102306924 A CN102306924 A CN 102306924A
- Authority
- CN
- China
- Prior art keywords
- circuit
- output
- links
- leakage current
- switch
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 130
- 238000012360 testing method Methods 0.000 claims abstract description 42
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 33
- 239000010703 silicon Substances 0.000 claims abstract description 33
- 230000006698 induction Effects 0.000 claims abstract description 19
- 238000005070 sampling Methods 0.000 claims abstract description 3
- 238000004088 simulation Methods 0.000 claims description 94
- 239000002184 metal Substances 0.000 claims description 59
- 230000001681 protective effect Effects 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000002457 bidirectional effect Effects 0.000 claims description 10
- 206010011906 Death Diseases 0.000 claims description 9
- 230000005669 field effect Effects 0.000 claims description 6
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 10
- 230000001934 delay Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention provides a leakage detecting protection circuit capable of periodically automatically detecting function integrity. The leakage detecting protection circuit comprises a main loop switch, a resetting button, a tripping coil, a silicon controlled rectifier, an induction coil for detecting leakage current, a self-induction coil for detecting a low-resistance failure and a control chip which drives the switching-on/off of the silicon controlled rectifier by a leakage current detection result, and further comprises a) a timer for periodically outputting a function integrity detection signal, b) a detection signal latching circuit, c) an analogue test switch for generating analogue leakage current, d) a delay output circuit and e) a sampling circuit, wherein the timer outputs the detection signal to the latching circuit and the delay output circuit; and if a function is detected to fail, the delay output circuit outputs a tripping signal to switch the silicon controlled rectifier on, and the main loop switch is switched off. The leakage detecting protection circuit has the main advantages of periodically automatically detecting whether the leakage protection function of the circuit is integral or not without annual testing and avoiding tripping within the service life of the circuit, along with more convenience of use.
Description
Technical field
The present invention relates to a kind of leakage current detection protection circuit that is applied to have the electrical equipment such as supply socket of creepage protection function; But be specifically related to a kind of leakage current detection protection circuit of timing automatic measuring ability integrality; If creepage protection function is intact; Testing process does not trip; If function is damaged, then automatic trip.
Background technology
Along with the supply socket with creepage protection function (being called for short GFCI); Attaching plug; The continuous development of mains switch industry; People are to having the supply socket of creepage protection function; The function of attaching plug; Safety in utilization requires more and more higher; Thereby this series products need be provided with corresponding leakage current detection protection circuit; The timely deenergization of the timely tripping operation of needs when in use leakage current occurring; And; Also the manual test function to be set; Promptly produce the simulation leakage current and make its tripping operation through manual operation; Like application number is that a kind of leakage current detection protection circuit has been announced in 201010237744.7 applications for a patent for invention; Comprise the major loop switch; Reset button; But the tripping coil that the cooperative mechanical structure is broken off the major loop switch; The controllable silicon of control tripping coil current supply circuit break-make; Be used to detect the induction coil of leakage current; The control chip etc. that is used to detect the self-induction coil of low resistance fault and drives the controllable silicon break-make through the leakage current testing result; Whether sort circuit need manually be pressed testing button generation simulation leakage current and stop with the testing circuit life-span, and whether can not detect creepage protection function automatically intact.
Summary of the invention
To above-mentioned technical problem, but the present invention provides a kind of leakage current detection protection circuit of timing automatic measuring ability integrality.
The technical scheme that realizes the object of the invention is:
But the leakage current detection protection circuit of timing automatic measuring ability integrality; But comprise tripping coil that major loop switch, reset button cooperative mechanical structure make the major loop switch and break off, control tripping coil current supply circuit break-make controllable silicon, be used to detect leakage current induction coil, be used to detect the self-induction coil of low resistance fault and drive the control chip of controllable silicon break-make through the leakage current testing result, also comprise a) the regularly timer of output function integrity detection signal; B) detection signal latch cicuit; C) be used to produce the simulation test switch of simulating leakage current; D) time-delay output circuit; E) be used for the sample circuit of intercepting control chip output current; Timer output detection signal to latch cicuit and time-delay output circuit; Latch cicuit is set and makes the simulation test switch closure; If measuring ability is complete; In delay cycle; The controllable silicon drive signal of control chip output is by the sample circuit intercepting; Latch cicuit is resetted, and the simulation test switch breaks off, time-delay output circuit no-output; If the measuring ability fault, time-delay output circuit output trip signal makes the controllable silicon conducting, and the major loop switch breaks off.
Further; Said detection signal latch cicuit comprises rest-set flip-flop and peripheral circuit, and said peripheral circuit comprises the automatic reset circuit be made up of resistance and the electric capacity of series connection, the voltage stabilizing circuit of being made up of voltage stabilizing didoe and filter capacitor and the unidirectional input circuit of being made up of diode and current-limiting resistance of reset terminal.
Preferred version as latch cicuit; Said rest-set flip-flop is constituted by rest-set flip-flop integrated chip or discrete component or d type flip flop and auxiliary element; The reset terminal of rest-set flip-flop links to each other with the reset terminal of timer and the output of sample circuit respectively; The set end of rest-set flip-flop links to each other with the output of timer; The output of rest-set flip-flop links to each other with the control end of simulation test switch, and the reversed-phase output of the output of rest-set flip-flop is unsettled.
As one of preferred version of sample circuit; Said sample circuit comprises induction coil, output amplifier and electronic switch; Input coils from parallel connection of coils one resonant capacitance and the end other end electronic switch of connecting over the ground that links to each other with the control chip output, the control end of electronic switch links to each other with the rest-set flip-flop output; The output coil links to each other with the rest-set flip-flop reset terminal through amplifier.
Further; Said induction coil is the booster type induction coil; Output coil parallel resonance electric capacity; Output coil one end links to each other with the positive-negative-positive output triode emitter of amplifier; The output triode base stage links to each other with the output coil other end through resistance, rectifier diode; Connect filter capacitor between the emitter and collector of output triode, the collector electrode resistance grounded of output triode.
As two of the preferred version of sample circuit; Said sample circuit comprises comparator and electronic switch; The in-phase input end of comparator links to each other with the control chip output, and the inverting input of comparator is through electronic switch ground connection, and the control end of electronic switch links to each other with the output of rest-set flip-flop.
Said simulation test switch is selected from a kind of in bidirectional triode thyristor, field effect transistor, tongue tube or the relay.
Said simulation test switch ends links to each other with zero-power line with power firestreak respectively, and the self-induction coil that is used to detect the low resistance fault is passed in simulation test switch loop.
Said simulation test switch ends is through a lead short circuit that passes the self-induction coil that is used to detect the low resistance fault.
One of time-delay output circuit preferred version; Said time-delay output circuit comprises two CMOS inverters and goes here and there discharge resistance between inverter; Discharge resistance connects discharge capacity over the ground; Discharge resistance also is parallel with the accelerated charging diode; The input of first inverter links to each other with rest-set flip-flop set end, and the output of second inverter links to each other with the silicon controlled control end.
Two of time-delay output circuit preferred version, said time-delay output circuit comprises charging delay circuit and the differential amplifier circuit of being made up of charging resistor and charging capacitor, the output of differential amplifier circuit links to each other with the silicon controlled control end.
As preferably; This circuit also comprises a single-pole double throw pattern plan power switch that links with reset button; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and the end that its moving contact lever C and another power input pass the self-induction coil that is used to detect the low resistance fault links to each other; When reset button was in trip status, the simulation power switch broke off; When reset button is pressed; Moving contact lever C of simulation power switch and quiet contact jaw A are closed; Automatically produce the simulation leakage current; And power supply is provided for whole detection protective circuit; The controllable silicon closure makes tripping coil get electric and then breaks off the major loop switch; Moving contact lever C of simulation power switch and quiet contact jaw B are closed, and for whole detection protective circuit provides power supply, the simulation leakage current disappears.
As another preferred version; This leakage current detection protection circuit also comprises a single-pole double throw pattern plan power switch that links with reset button; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and the end that its moving contact lever C and another power input pass the self-induction coil that is used to detect the low resistance fault links to each other; When reset button was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When reset button was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After reset button resetted, the moving contact lever C of simulation power switch contacted with the second quiet contact jaw B, for whole detection protective circuit provides power supply.
Beneficial effect of the present invention mainly shows: just whether timing automatic testing circuit creepage protection function is intact but need not manual test, and if the life-span does not stop then can not tripping, uses more convenient; Each functional circuit combination reaches reasonable in design separately, and cost is low, is swift in response reliable in action.
Description of drawings
Fig. 1 is the circuit structure diagram of the embodiment of the invention one;
Fig. 2 realizes not tripping the regularly circuit structure block diagram of measuring ability integrality;
Fig. 3 is the latch cicuit structure chart that constitutes through the rest-set flip-flop integrated chip;
Fig. 4 is the latch cicuit structure chart that discrete component constitutes;
Fig. 5 is the latch cicuit structure chart that d type flip flop constitutes;
Fig. 6 is the sample circuit structure figure that is made up of induction coil etc.;
Fig. 7 is the sample circuit structure figure that is made up of comparator etc.;
Fig. 8 is the simulation test switch junctions composition that is made up of bidirectional triode thyristor;
Fig. 9 is the simulation test switch junctions composition that is made up of field effect transistor;
Figure 10 is the simulation test switch junctions composition that is made up of relay;
Figure 11 is the simulation test switch junctions composition that is made up of tongue tube;
The time-delay output circuit structure figure that Figure 12 is made up of inverter and discharge circuit;
The time-delay output circuit structure figure that Figure 13 is made up of differential amplifier circuit and charging circuit;
Figure 14 realizes not tripping regularly one of structure of measuring ability integrality circuit;
Figure 15 be realize not tripping regularly measuring ability integrality circuit structure two;
Figure 16 be realize not tripping regularly measuring ability integrality circuit structure three;
Figure 17 be realize not tripping regularly measuring ability integrality circuit structure four;
Figure 18 be realize not tripping regularly measuring ability integrality circuit structure five;
Figure 19 is the circuit structure diagram of the embodiment of the invention two;
Figure 20 is the circuit structure diagram of the embodiment of the invention three;
Figure 21 is the circuit structure diagram of the embodiment of the invention four;
Figure 22 is the circuit structure diagram of the embodiment of the invention five;
Figure 23 is the circuit structure diagram of the embodiment of the invention six;
Figure 24 is the circuit structure diagram of the embodiment of the invention seven;
Figure 25 is the circuit structure diagram of the embodiment of the invention eight;
Figure 26 is the circuit structure diagram of the embodiment of the invention nine.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is done and to describe in further detail:
Embodiment one
See figures.1.and.2; But the leakage current detection protection circuit of timing automatic measuring ability integrality; But comprise tripping coil L3 that major loop K switch R2-1, KR2-2, reset button RESET cooperative mechanical structure make the major loop switch and break off, control tripping coil current supply circuit break-make controllable silicon V4, be used to detect leakage current induction coil L1, be used to detect the self-induction coil L2 of low resistance fault and drive the control chip IC1 of controllable silicon break-make through the leakage current testing result, also comprise a) the regularly timer DSQ of output function integrity detection signal; B) the detection signal latch cicuit 2; C) be used to produce the simulation test switch 4 of simulating leakage current; D) time-delay output circuit 5; E) be used for the sample circuit 3 of intercepting control chip output current; Timer output detection signal to latch cicuit and time-delay output circuit; Latch cicuit is set and makes the simulation test switch closure; If measuring ability is complete; In delay cycle; The controllable silicon drive signal of control chip IC1 output is by the sample circuit intercepting; Latch cicuit is resetted, and the simulation test switch breaks off, time-delay output circuit no-output; If the measuring ability fault, time-delay output circuit output trip signal makes the controllable silicon conducting, and major loop K switch R2-1, KR2-2 break off.
With reference to Fig. 3, Fig. 4 and Fig. 5; Detection signal latch cicuit 2 comprises rest-set flip-flop and peripheral circuit, and peripheral circuit comprises automatic reset circuit that resistance 2R2 and the electric capacity 2C1 by series connection form, the voltage stabilizing circuit of being made up of voltage stabilizing didoe 2V6 and filter capacitor 2C2 and the unidirectional input circuit of being made up of diode 2V1 and current-limiting resistance 2R1 of reset terminal.
RS flip-flop by the RS flip-flop integrated chip (Figure 3) or discrete components (Figure 4) or D flip-flop combination with the auxiliary element (FIG 5) constitute, RS flip-flop reset terminal R of each reset terminal R of the timer and the sampling circuit connected to the output, RS flip-flop to the set terminal S is connected to the output terminal of the timer, RS flip-flop output Q of the analog test switch is connected to a control terminal, RS flip-flop output terminal of inverting output terminal
unconnected.
With reference to Fig. 6; Sample circuit 3 comprises induction coil 3L1, output amplifier and electronic switch 3V3; Input coils from parallel connection of coils one a resonant capacitance 3C3 and the end other end electronic switch 3V3 that connects over the ground that links to each other with control chip IC1 output, the control end of electronic switch 3V3 links to each other with rest-set flip-flop output Q; The output coil links to each other with rest-set flip-flop reset terminal R through amplifier 3V1.
Induction coil 3L1 is the booster type induction coil; The turn ratio can be 10:100 etc.; Output coil parallel resonance electric capacity 3C2; Output coil one end links to each other with the positive-negative-positive output triode 3V1 emitter of amplifier; The output triode base stage links to each other with the output coil other end through resistance 3R1, rectifier diode 3V2; Connect filter capacitor 3C1 between the emitter and collector of output triode 3V1, the collector electrode of output triode is through resistance 3R2 ground connection.
With reference to Fig. 7; Sample circuit 3 also can be made up of comparator 3IC1 and electronic switch 3V3; The in-phase input end of comparator 3IC1 links to each other with control chip IC1 output, and the inverting input of comparator is through electronic switch 3V3 ground connection, and the control end of electronic switch links to each other with the output of rest-set flip-flop.
With reference to Fig. 8, Fig. 9, Figure 10 and shown in Figure 11; Simulation test switch 4 is selected from a kind of in bidirectional triode thyristor (Fig. 8), field effect transistor (Fig. 9), tongue tube (10) or the relay (Figure 11); Also can be other bidirectional electronic switch, the method that specifically connects be with reference to shown in the accompanying drawing.
Figure 14 to Figure 18 is the particular circuit configurations that the functional circuit module among Fig. 2 is combined with above-mentioned concrete functional circuit; Leakage current detection control circuit is made up of control chip IC1 and respective peripheral circuit among the figure; Wherein simulation test switch 4 has two kinds to connect method; As shown in figure 15 a kind of; Two ends link to each other with zero-power line with power firestreak respectively, and the self-induction coil L2 that is used to detect the low resistance fault is passed in simulation test switch loop.Another kind is then like Figure 14, Figure 16, Figure 17 and shown in Figure 180, and simulation test switch 4 two ends are through a lead short circuit that passes the self-induction coil L2 that is used to detect the low resistance fault, and two kinds connect method and all can produce and regularly detect required artificial simulation leakage current.
Figure 12 shows a discharge type delay output circuit outputs the delay circuit 5 includes two CMOS inverters in the inverter string 5IC1 and discharge resistor between 5R1, 5R1 discharge resistor is connected to discharge the capacitor 5C1, also in parallel with the discharge resistor 5R1 speed charging diode 5V1, the first inverter input terminal is connected to the set terminal of RS flip-flop, the second output terminal of the inverter thyristor is connected to the control terminal of V4, the timer DSQ output high level detection signal, the first inverter output is zero, since the capacitor voltage is not mutated 5C1, beginning of the discharge resistor 5R1, if the delay period is not reset within the RS flip-flop, indicating that the leakage protection function is damaged, the discharge to the second inverter input is zero, so that the second inverter output high SCR V4 conduction; delay period if RS flip-flop circuit 3 outputs the sampled signal is reset, leakage protection intact, DSQ timer is also reset to restart the count, the detection signal disappears, the first inverter input to zero, the second inverter without high output, and thus no conduction thyristor V4.
Shown in Figure 13 is a kind of charge type time-delay output circuit; Time-delay output circuit 5 comprises charging delay circuit and the differential amplifier circuit of being made up of charging resistor 5R1 and charging capacitor 5C1; The output of differential amplifier circuit links to each other with the control end of controllable silicon V4, and the course of work and discharge-type time-delay output circuit are similar.
As can be seen from Figure 1; This leakage current detection protection circuit also comprises a single-pole double throw pattern plan power switch KR-2 who links with reset button RESET; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and the end that its moving contact lever C and another power input pass the self-induction coil L2 that is used to detect the low resistance fault links to each other; When reset button was in trip status, simulation power switch KR-2 broke off; When reset button is pressed; Moving contact lever C of simulation power switch KR-2 and quiet contact jaw A are closed; Automatically produce the simulation leakage current; And power supply is provided for whole detection protective circuit; Controllable silicon V4 closure makes tripping coil get electric and then breaks off major loop K switch R2-1, KR2-2; Moving contact lever C of simulation power switch KR-2 and quiet contact jaw B are closed, and for whole detection protective circuit provides power supply, the simulation leakage current disappears.
For preventing that this leakage current detection protection circuit also comprises at least one group of discharge metal sheet because of thunderbolt waits the damage of the instantaneous pressure of generation to circuit; The discharge tip of the first discharge metal sheet M1 and the second discharge metal sheet M2 or discharge cambered surface are disposed opposite to each other and have certain interval; The first discharge metal sheet M1 links to each other with power supply output sleeve live wire, and the second discharge metal sheet M2 links to each other with power supply output sleeve zero line.
Embodiment two
With reference to Figure 19; The leakage current detection protection circuit of present embodiment is provided with a single-pole double throw pattern with the reset button interlock equally and intends power switch KR-2; But its structure is different; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and the end that its moving contact lever C and another power input pass the self-induction coil L2 that is used to detect the low resistance fault links to each other; When reset button was in trip status, the moving contact lever C of this simulation power switch KR-2 linked to each other with the second quiet contact jaw B, and simulation power switch KR-2 is in closure state; When reset button was pressed, the moving contact lever C and the second quiet contact jaw B of simulation power switch KR-2 broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch KR-2 transfers the closed state that links to each other with quiet contact jaw B automatically to; After reset button resetted, the moving contact lever C of simulation power switch KR-2 contacted with the second quiet contact jaw B, for whole detection protective circuit provides power supply.
For further improving anti-thunderbolt effect, the leakage current detection protection circuit of present embodiment is provided with two pairs of discharge metal sheets respectively at output and input, and the discharge metal sheet set-up mode of output is with embodiment one; The discharge metal sheet set-up mode of input is following: the discharge tip of the first discharge metal sheet M3 and the second discharge metal sheet M4 or discharge cambered surface are disposed opposite to each other and have certain interval; The first discharge metal sheet M3 links to each other with one of power input live wire or zero line (M3 links to each other with live wire HOT among Figure 19), and the second discharge metal sheet M4 links to each other (M4 links to each other with zero line WHITE among Figure 19) with power input zero line or the live wire that another passes induction coil and self-induction coil.
This leakage current detection protection circuit also comprises at least two piezo-resistance YM1 and YM2; After the first piezo-resistance YM1 and the second piezo-resistance YM2 series connection, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire through tripping coil.After the second piezo-resistance YM2 series connection,, real work born the effect of unusual overpressure protection after resetting; Promptly second piezo-resistance will form puncture simulation leakage current when the voltage of working power surpasses load voltage value; Realize automatic protectiveness tripping operation, the output of cutting off the electricity supply is with the protection power consumption equipment.
Glittering analog operation indicating circuit once when this leakage current detection protection circuit also comprises manual a test comprises light-emitting diode V3, resistance R 5 and diode V2; One is connected to the bright often wiring error of power output end in mistake with power line indicates (light-emitting diode V5:LED) circuit and control circuit power indicating circuit (comprising light-emitting diode V3, resistance R 5); The wiring error indicating circuit comprises rectifier diode V8, current-limiting resistance R7; End life indicating circuit: string has a light-emitting diode 5V5 between the output of time-delay output circuit and the SCR control end; The analog operation indicating circuit is causing the major loop switch trip to break off back Chang Liang because of end-of-life, 5V5 forms end life indicating circuit with light-emitting diode.
Embodiment three
With reference to Figure 20, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of comparator and electronic switch 3V3, the triode of electronic switch employing here (also can adopt field effect transistor if required drive current is less); The bidirectional triode thyristor V4 that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment is through tripping coil L3, piezo-resistance YM2 link to each other with the zero line of major loop zero line K switch R2-2 rear end (being the output zero line); Quiet contact jaw B links to each other with power supply input live wire HOT end; Quiet contact jaw A with pass self-excitation coil L2 live wire HOT tap and link to each other; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets equally, and the first discharge metal sheet M3 of input links to each other with power supply input zero line WHITE, and the second discharge metal sheet M4 of input links to each other with the power firestreak tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.
This leakage current detection protection circuit also comprises an earth leakage protective control circuit relay indicating light circuit.This earth leakage protective control circuit relay indicating light circuit is made up of indicator light LED1 (light-emitting diode V3), negative rectifier diode V2 and current-limiting resistance R5.V3 indicator light LED1.And after negative rectifier diode V2 and the current-limiting resistance R5 series connection; Be connected in parallel on the two ends of earth leakage protective control circuit V1, R1, IC1; One end links to each other with zero-power line through tripping coil L3 (solenoid SOL), and the other end links to each other with power firestreak through simulation power switch KR-2.Constitute the path of the simulation leakage current that resets again; Reach the function of earth leakage protective control circuit reset detection.If end-of-life promptly stops and resets.The present invention has: simulation electric leakage and relay indicating light dual-use function: 1, when reset button is pressed; If leakage current detection protection circuit does not have end-of-life; This earth leakage protective control circuit relay indicating light circuit produces negative half cycle simulation leakage current; Indicator light LED1 is once glittering; And earth leakage protective control circuit V1, R1, IC1 circuit are positive half cycle simulation leakage currents; If the leakage current detection protection circuit end-of-life then stops reset button to reset; Whether 2, simultaneously, this earth leakage protective control circuit relay indicating light circuit has indication earth leakage protective control circuit power supply normal function again, shows whether end-of-life of leakage current detection protection circuit, can operate as normal; So earth leakage protective control circuit relay indicating light circuit of the present invention unites two into one two kinds of functions, circuit is more succinct.
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level; Show that the life-span stops prompting user replacing.
Embodiment four
With reference to Figure 21, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of comparator and electronic switch 3V3, the triode of electronic switch employing here (also can adopt field effect transistor if the required drive current of controllable silicon V4 is less); The bidirectional triode thyristor that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply input zero line through tripping coil L3, piezo-resistance YM2; Live wire tap (power supply output live wire) behind quiet contact jaw B and the major loop live wire switch links to each other; Quiet contact jaw A links to each other with power supply input live wire HOT end; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with three pairs of discharge metal sheets, and the first discharge metal sheet M3 of input links to each other with power supply input zero line WHITE, and the second discharge metal sheet M4 of input links to each other with the power firestreak tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.The 3rd couple of discharge metal sheet M7, M8 also are set in addition, and the first discharge metal sheet M7 links to each other with power supply input zero line, and the second discharge metal sheet M8 links to each other with the moving contact lever C of simulation power switch KR-2.
This leakage current detection protection circuit also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection; One end links to each other (when moving contact lever C links to each other with quiet contact jaw B) with the power supply output zero line that passes self-excitation coil L2 through tripping coil L3 (solenoid SOL) and simulation power switch KR-2, and the other end links to each other with power supply input live wire through piezo-resistance YM2.
In order in time to react the operating state of leakage current detection protection circuit, present embodiment also comprises an operating state display circuit.This display circuit is made up of power supply output indicator LED3, diode V6 and current-limiting resistance R6.After power supply output indicator LED3, diode V6 and the current-limiting resistance R6 series connection, an end links to each other with the power output end live wire, and the other end links to each other with the power output end zero line through K switch R-4.When the leakage current detection protection circuit power output end had power supply output, LED3 was bright for the power supply output indicator, otherwise LED3 does not work.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Embodiment five
With reference to Figure 22, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of comparator and electronic switch 3V3, the triode of electronic switch employing here; The bidirectional triode thyristor that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply input zero line WHITE through tripping coil L3, piezo-resistance YM2; Live wire tap (power supply output live wire) behind quiet contact jaw B and the major loop live wire switch links to each other; Quiet contact jaw A links to each other with power supply input live wire HOT end; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets, and the first discharge metal sheet M3 of input links to each other with power supply input zero line WHITE, and the second discharge metal sheet M4 of input links to each other with the power firestreak tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.
This leakage current detection protection circuit also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection; One end links to each other (when moving contact lever C links to each other with quiet contact jaw B) with the power supply output zero line that passes self-excitation coil L2 through tripping coil L3 (solenoid SOL) and simulation power switch KR-2, and the other end links to each other with power supply input live wire through piezo-resistance YM2.
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
This leakage current detection protection circuit also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection, an end links to each other with zero-power line through tripping coil L3 (solenoid SOL), and the other end links to each other with power firestreak through simulation power switch KR-2.Analog operation indicator light circuit of the present invention has dual-use function: 1, when reset button is pressed; If leakage current detection protection circuit does not have end-of-life; This analog operation indicator light circuit produces the simulation leakage current; Indicator light LED1 is once glittering; If the leakage current detection protection circuit end-of-life then stops reset button to reset; Whether 2, simultaneously, this analog operation indicator light circuit has indication, Presentation Function again, shows whether end-of-life of leakage current detection protection circuit, can operate as normal.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Embodiment six
With reference to Figure 23, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of comparator and electronic switch 3V3, the triode of electronic switch employing here; The bidirectional triode thyristor that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply output zero line through piezo-resistance YM1, tripping coil L3; Zero line tap (power supply output zero line) behind quiet contact jaw B and the major loop zero line switch links to each other; Quiet contact jaw A links to each other with power supply input zero line WHITE end; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other; Another moving contact lever C to discharge metal sheet M7, M8 difference power supply input live wire HOT and simulation power switch KR-2 links to each other.
This leakage current detection protection circuit also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection; One end links to each other (when moving contact lever C links to each other with quiet contact jaw B) with the power supply output zero line that passes self-excitation coil L2 through tripping coil L3 (solenoid SOL) and simulation power switch KR-2, and the other end links to each other with power supply input live wire through piezo-resistance YM2.
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED3 does not work.
This leakage current detection protection circuit also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection; One end links to each other with the power supply output live wire that passes self-excitation coil L2 through tripping coil L3 (solenoid SOL), and the other end is through simulation power switch KR-2 continuous with the power firestreak output that passes self-excitation coil L2 (when moving contact lever C contacts with quiet contact-segment B).
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Embodiment seven
With reference to Figure 24, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of comparator and electronic switch 3V3, the triode of electronic switch employing here; The bidirectional triode thyristor that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply output zero line through piezo-resistance YM1, tripping coil L3; Quiet contact jaw B links to each other with power supply output zero line side; Quiet contact jaw A links to each other with power supply input zero line WHITE end; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets, and the first discharge metal sheet M3 of input links to each other with power supply input zero line WHITE, and the second discharge metal sheet M4 of input links to each other with the power firestreak tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.
This leakage current detection protection circuit also comprises a leakage protection circuit relay indicating light circuit.This leakage protection circuit relay indicating light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and current-limiting resistance R5.After indicator light LED1, diode V2 and the current-limiting resistance R5 series connection; One end links to each other with the power supply output live wire that passes self-excitation coil L2 through tripping coil L3 (solenoid SOL), and the other end is through simulation power switch KR-2 and power supply input zero line continuous (when moving contact lever C contacts with quiet contact jaw A).
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Embodiment eight
With reference to Figure 25, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of induction coil 3L1, output amplifier and electronic switch, and electronic switch adopts relay here; The tongue tube that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply output live wire through piezo-resistance YM1, tripping coil L3; Quiet contact jaw B links to each other with power supply input zero line side WHITE; Quiet contact jaw A links to each other with power supply output zero line side; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets, and the first discharge metal sheet M3 of input links to each other with power supply input live wire HOT, and the second discharge metal sheet M4 of input links to each other with the zero-power line tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.
This leakage current detection protection circuit also comprises a leakage protection circuit relay indicating light circuit.This leakage protection circuit relay indicating light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and current-limiting resistance R5.After indicator light LED1, diode V2 and the current-limiting resistance R5 series connection, an end links to each other with power supply input live wire, and the other end is through simulation power switch KR-2 and power supply input zero line continuous (when moving contact lever C contacts with quiet contact jaw B).
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Embodiment nine
With reference to Figure 26, the latch cicuit 2 of present embodiment is made up of rest-set flip-flop integrated chip and peripheral circuit; Sample circuit 3 is made up of induction coil 3L1, output amplifier and electronic switch, and electronic switch adopts relay here; The tongue tube that analog detection switch 4 adopts; What time-delay output circuit 5 adopted is that inverter adds the discharge combination of circuits.
The moving contact lever C of the simulation power switch KR-2 of present embodiment links to each other with power supply output zero line through piezo-resistance YM1, tripping coil L3; Quiet contact jaw B links to each other with power supply input live wire end HOT end; Quiet contact jaw A links to each other with the power supply output live wire end that passes self-excitation coil L2; This simulation power switch KR-2 has only two gears, and promptly moving contact lever C contacts with quiet contact jaw B or contacts with quiet contact-segment A.
This leakage current detection protection circuit is provided with two pairs of discharge metal sheets, and the first discharge metal sheet M3 of input links to each other with power supply input zero line HOT, and the second discharge metal sheet M4 of input links to each other with the power firestreak tap of passing self-excitation coil L2; Power supply output live wire behind the first discharge metal sheet M1 of output and the major loop live wire K switch R2-1 links to each other, and the power supply behind the second discharge metal sheet M2 and the major loop zero line K switch R2-2 is exported zero line and linked to each other.
This leakage current detection protection circuit also comprises a leakage protection circuit relay indicating light circuit.This leakage protection circuit relay indicating light circuit is made up of indicator light LED1 (light-emitting diode V3), diode V2 and current-limiting resistance R5.After indicator light LED1, diode V2 and the current-limiting resistance R5 series connection, an end links to each other with power supply input zero line, and the other end is through simulation power switch KR-2 and the defeated fiery zero line of power supply continuous (when moving contact lever C contacts with quiet contact jaw B).
This leakage current detection protection circuit also comprises a wiring error display circuit, and this wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2 (light-emitting diode V8), diode V7 and the current-limiting resistance R7 with the reset button interlock.After normally closed switch KR-3, diode V7, indicator light LED2 and the current-limiting resistance R7 of reset button interlock connected successively, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When reset button RESET was in trip status, K switch R-3 was closed, and when reset button RESET was in reset mode, K switch R-3 broke off, and indicator light LED2 can not light, and the expression wiring is correct.When mistakenly the power line in the wall being linked to each other with leakage current detection protection circuit power output end LOAD; Because reset button RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED3 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even reset button RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
This leakage current detection protection circuit also comprises an end life indicating circuit; Be the anode and the light-emitting diode 5V5 that output circuit 5 outputs link to each other, negative electrode links to each other with controllable silicon V4 control end that delays time; 5V5 lights when the time-delay output circuit is exported by high level, shows that the life-span stops.
Though the present invention is through illustrating and describe with reference to preferred embodiment,, those of ordinary skills should understand, and can be not limited to the description of the foregoing description, in the scope of claims, can do the various variations on form and the details.
Claims (19)
1. but the leakage current detection protection circuit of timing automatic measuring ability integrality; Comprise major loop switch (KR2-1, KR2-2) but, reset button cooperative mechanical structure make tripping coil (L3) that the major loop switch breaks off, control tripping coil current supply circuit break-make controllable silicon (V4), be used to detect leakage current induction coil (L1), be used to detect the self-induction coil (L2) of low resistance fault and drive the control chip (IC1) of controllable silicon break-make through the leakage current testing result, it is characterized in that: also comprise a) the regularly timer of output function integrity detection signal; B) detection signal latch cicuit; C) be used to produce the simulation test switch of simulating leakage current; D) time-delay output circuit; E) be used for the sample circuit of intercepting control chip output current; Timer output detection signal to latch cicuit and time-delay output circuit; Latch cicuit is set and makes the simulation test switch closure; If measuring ability is complete; In delay cycle; The controllable silicon drive signal of control chip (IC1) output is by the sample circuit intercepting; Latch cicuit is resetted, and the simulation test switch breaks off, time-delay output circuit no-output; If the measuring ability fault, time-delay output circuit output trip signal makes the controllable silicon conducting, and the major loop switch breaks off.
2. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1; It is characterized in that: said detection signal latch cicuit comprises rest-set flip-flop and peripheral circuit, and said peripheral circuit comprises the automatic reset circuit be made up of resistance (2R2) and the electric capacity (2C1) of series connection, the voltage stabilizing circuit of being made up of voltage stabilizing didoe (2V6) and filter capacitor (2C2) and the unidirectional input circuit of being made up of diode (2V1) and current-limiting resistance (2R1) of reset terminal.
3. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 2; It is characterized in that: said rest-set flip-flop is constituted by rest-set flip-flop integrated chip or discrete component or d type flip flop and auxiliary element; The reset terminal of rest-set flip-flop links to each other with the reset terminal of timer and the output of sample circuit respectively; The set end of rest-set flip-flop links to each other with the output of timer; The output of rest-set flip-flop links to each other with the control end of simulation test switch, and the reversed-phase output of the output of rest-set flip-flop is unsettled.
4. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1; It is characterized in that: said sample circuit comprises induction coil (3L1), output amplifier and electronic switch (3V3); Input coils from parallel connection of coils one resonant capacitance (3C3) and the end other end electronic switch (3V3) of connecting over the ground that links to each other with control chip (IC1) output, the control end of electronic switch (3V3) links to each other with the rest-set flip-flop output; The output coil links to each other with the rest-set flip-flop reset terminal through amplifier.
5. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 4; It is characterized in that: said induction coil is the booster type induction coil; Output coil parallel resonance electric capacity (3C2); Positive-negative-positive output triode (3V1) emitter of output coil one end links to each other; The output triode base stage links to each other with the output coil other end through resistance (3R1), rectifier diode (3V2); Connect filter capacitor (3C1) between the emitter and collector of output triode, the collector electrode of output triode is through resistance (3R2) ground connection.
6. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1; It is characterized in that: said sample circuit comprises that the electric current of sampling is through resistance (3R1), (3R5), comparator (3IC1) and electronic switch (3V3); The in-phase input end of comparator links to each other with control chip (IC1) output; The inverting input of comparator is through electronic switch (3V3) ground connection, and the control end of electronic switch links to each other with the output of rest-set flip-flop.
7. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1 is characterized in that: said simulation test switch is selected from a kind of in bidirectional triode thyristor, field effect transistor, tongue tube or the relay.
8. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 7; It is characterized in that: said simulation test switch ends links to each other with zero-power line with power firestreak respectively, and the self-induction coil (L2) that is used to detect the low resistance fault is passed in simulation test switch loop.
9. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 7 is characterized in that: said simulation test switch ends is through a lead short circuit that passes the self-induction coil (L2) that is used to detect the low resistance fault.
10. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1; It is characterized in that: said time-delay output circuit comprises two CMOS inverters and goes here and there discharge resistance (5R1) between inverter; Discharge resistance (5R1) connects discharge capacity (5C1) over the ground; Discharge resistance (5R1) also is parallel with accelerated charging diode (5V1); The input of first inverter links to each other with rest-set flip-flop set end, and the output of second inverter links to each other with the control end of controllable silicon (V4).
11. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 1; It is characterized in that: said time-delay output circuit comprises by charging resistor (5R1), quicken the differential amplifier circuit that charging delay circuit that discharge diode (5V1) and charging capacitor (5C1) form and discrete component are formed, and the output of differential amplifier circuit links to each other with the control end of controllable silicon (V4).
12. but according to the leakage current detection protection circuit of each described timing automatic measuring ability integrality of claim 1 to 11; It is characterized in that: this circuit also comprises a single-pole double throw pattern plan power switch (KR-2) that links with reset button; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and its moving contact lever C links to each other with the end that another power input passes the self-induction coil (L2) that is used to detect the low resistance fault; When reset button was in trip status, simulation power switch (KR-2) broke off; When reset button is pressed; Moving contact lever C of simulation power switch (KR-2) and quiet contact jaw A are closed; Automatically produce the simulation leakage current; And power supply is provided for whole detection protective circuit; Controllable silicon (V4) closure makes tripping coil get electric and then breaks off major loop switch (KR2-1, KR2-2); Moving contact lever C of simulation power switch (KR-2) and quiet contact jaw B are closed, and for whole detection protective circuit provides power supply, the simulation leakage current disappears.
13. but according to the leakage current detection protection circuit of each described timing automatic measuring ability integrality of claim 1 to 11; It is characterized in that: also comprise a single-pole double throw pattern plan power switch (KR-2) that links with reset button; Its first quiet contact jaw A links to each other with one of power input; Its second quiet contact jaw B links to each other with the respective electrical source output terminal, and its moving contact lever C links to each other with the end that another power input passes the self-induction coil (L2) that is used to detect the low resistance fault; When reset button was in trip status, the moving contact lever C of this simulation power switch (KR-2) linked to each other with the second quiet contact jaw B, and simulation power switch (KR-2) is in closure state; When reset button was pressed, the moving contact lever C of simulation power switch (KR-2) and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch (KR-2) transfers the closed state that links to each other with quiet contact jaw B automatically to; After reset button resetted, the moving contact lever C of simulation power switch (KR-2) contacted with the second quiet contact jaw B, for whole detection protective circuit provides power supply.
But 14. the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 13 is characterized in that: this leakage current detection protection circuit also comprises at least one group of discharge metal sheet; The discharge tip of the first discharge metal sheet and the second discharge metal sheet or discharge cambered surface are disposed opposite to each other and have certain interval; The first discharge metal sheet links to each other with power supply output sleeve live wire, and the second discharge metal sheet links to each other with power supply output sleeve zero line.
But 15. the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 13 is characterized in that: this leakage current detection protection circuit also comprises at least one group of discharge metal sheet; The discharge tip of the first discharge metal sheet and the second discharge metal sheet or discharge cambered surface are disposed opposite to each other and have certain interval; The first discharge metal sheet links to each other with one of power input live wire or zero line, and the second discharge metal sheet links to each other with power input zero line or live wire that another passes induction coil and self-induction coil.
But 16. the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 13 is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances (YM1, YM2); After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire through tripping coil.
But 17. the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 13 is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances (YM1, YM2); After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line; And two continuous common ports of piezo-resistance link to each other with the power input live wire through the quiet contact jaw of tripping coil, simulation power switch.
But 18. the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 13 is characterized in that: glittering analog operation indicating circuit, once had been connected to the bright often wiring error indicating circuit of power output end in mistake with power line when this leakage current detection protection circuit also comprised manual a test.
19. but the leakage current detection protection circuit of timing automatic measuring ability integrality according to claim 18; It is characterized in that: string has a light-emitting diode (5V5) between the output of said time-delay output circuit and the SCR control end; Said analog operation indicating circuit is causing the major loop switch trip to break off back Chang Liang because of end-of-life, (5V5) forms end life indicating circuit with light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102703169A CN102306924B (en) | 2011-09-14 | 2011-09-14 | Leakage detecting protection circuit capable of periodically automatically detecting function integrity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102703169A CN102306924B (en) | 2011-09-14 | 2011-09-14 | Leakage detecting protection circuit capable of periodically automatically detecting function integrity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102306924A true CN102306924A (en) | 2012-01-04 |
| CN102306924B CN102306924B (en) | 2013-11-20 |
Family
ID=45380751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102703169A Expired - Fee Related CN102306924B (en) | 2011-09-14 | 2011-09-14 | Leakage detecting protection circuit capable of periodically automatically detecting function integrity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102306924B (en) |
Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931633A (en) * | 2012-10-05 | 2013-02-13 | 黄松和 | Leakage protection circuit with real-time failure display function |
| CN103208776A (en) * | 2013-01-23 | 2013-07-17 | 陈泽 | Breaker circuit with fault self-detection function |
| CN103219702A (en) * | 2013-03-21 | 2013-07-24 | 温州市万盛电器有限公司 | Electric leakage detection protection circuit capable of performing timed self-detection |
| CN103401214A (en) * | 2013-07-17 | 2013-11-20 | 温州市万盛电器有限公司 | Electric leakage detection protection circuit with timing self-checking function |
| CN103792867A (en) * | 2012-10-29 | 2014-05-14 | 株式会社万都 | Electronic control apparatus and method for checking reset function |
| CN104316820A (en) * | 2014-10-30 | 2015-01-28 | 冯江生 | Starter electric leakage detection hunting circuit |
| CN104422830A (en) * | 2013-08-27 | 2015-03-18 | 施耐德电器工业公司 | Leakage protector and leakage protection function detection method |
| 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 |
| CN104935295A (en) * | 2015-07-01 | 2015-09-23 | 东南大学 | Gallium nitride-based clamped-beam RS trigger with low leakage current |
| CN106253216A (en) * | 2016-09-26 | 2016-12-21 | 东莞市达昌实业有限公司 | A kind of can timing earth leakage protective device |
| CN106571617A (en) * | 2016-10-14 | 2017-04-19 | 无锡市海升电子科技有限公司 | Leakage protector capable of carrying out leakage detection automatically |
| CN106711923A (en) * | 2017-02-17 | 2017-05-24 | 中领世能（天津）科技有限公司 | Isolation protection device and power supply system |
| CN106711922A (en) * | 2017-02-17 | 2017-05-24 | 中领世能（天津）科技有限公司 | Electrical shock protection device and power supply system |
| CN106771532A (en) * | 2017-02-15 | 2017-05-31 | 许良炎 | A kind of earth leakage protective device transient current method of testing and test circuit |
| CN106932717A (en) * | 2016-08-31 | 2017-07-07 | 中山市开普电器有限公司 | A kind of earth leakage protective device comprehensive test device |
| CN107026427A (en) * | 2016-02-02 | 2017-08-08 | 益而益(集团)有限公司 | Use electric detection means |
| CN107769159A (en) * | 2017-10-25 | 2018-03-06 | 浙江致威电子科技有限公司 | A kind of earth leakage protective device, electrical leakage detecting method and a kind of charging equipment |
| CN107843807A (en) * | 2016-09-20 | 2018-03-27 | 丰郅(上海)新能源科技有限公司 | A kind of moment in Voltage Drop can turn off the monitoring system of power network in time |
| CN107863754A (en) * | 2017-11-09 | 2018-03-30 | 南通盛洋电气有限公司 | A kind of transformer leakage stream automatic earthing electric installation |
| CN108061838A (en) * | 2017-12-18 | 2018-05-22 | 淄博职业学院 | A kind of leakage tests method for ensureing user's normal electricity consumption |
| CN108318727A (en) * | 2017-01-18 | 2018-07-24 | 中芯国际集成电路制造(上海)有限公司 | A kind of test circuit and test method of standard block leakage current |
| US20180278040A1 (en) * | 2017-03-21 | 2018-09-27 | Shanghai Fudan Microelectronics Group Company Limited | Ground Fault Protection System |
| CN108631263A (en) * | 2017-03-21 | 2018-10-09 | 上海复旦微电子集团股份有限公司 | Ground-fault protection system |
| CN108710080A (en) * | 2018-08-10 | 2018-10-26 | 江苏创能电器有限公司 | Leakage analog trial jump apparatus and system |
| CN109196746A (en) * | 2016-05-17 | 2019-01-11 | 三菱电机株式会社 | Leakage circuit breakers |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN110352359A (en) * | 2017-04-21 | 2019-10-18 | 欧姆龙株式会社 | Leakage current computing device and electric leakage flow calculation methodologies |
| CN110676808A (en) * | 2019-09-17 | 2020-01-10 | 深圳市晶扬电子有限公司 | Silicon controlled rectifier fault self-testing method, circuit, connector and electrical equipment |
| CN111579970A (en) * | 2020-06-03 | 2020-08-25 | 广东韶钢松山股份有限公司 | Test circuit, test device and method for testing an electronic switchboard |
| CN113659519A (en) * | 2021-05-21 | 2021-11-16 | 上海蕴原电器有限公司 | Failure automatic monitoring circuit and ground fault circuit breaker using same |
| CN113848509A (en) * | 2021-09-16 | 2021-12-28 | 南京康尼新能源汽车零部件有限公司 | Charging equipment electric leakage self-checking device and self-checking method |
| CN114336549A (en) * | 2022-01-04 | 2022-04-12 | 中科能投科技集团有限公司 | Power supply and distribution energy-saving device system capable of changing power parameters |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009089574A (en) * | 2007-10-03 | 2009-04-23 | Mitsubishi Electric Corp | Ground-fault circuit interrupter |
| CN201422012Y (en) * | 2009-01-14 | 2010-03-10 | 黄华道 | Leakage detection and protection circuit with end-of-life detection and display function |
| CN101872956A (en) * | 2009-04-22 | 2010-10-27 | 黄华道 | Leakage current detection protection circuit |
| CN201887425U (en) * | 2010-01-28 | 2011-06-29 | 黄华道 | Electricity leakage detection display protection circuit |
-
2011
- 2011-09-14 CN CN2011102703169A patent/CN102306924B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009089574A (en) * | 2007-10-03 | 2009-04-23 | Mitsubishi Electric Corp | Ground-fault circuit interrupter |
| CN201422012Y (en) * | 2009-01-14 | 2010-03-10 | 黄华道 | Leakage detection and protection circuit with end-of-life detection and display function |
| CN101872956A (en) * | 2009-04-22 | 2010-10-27 | 黄华道 | Leakage current detection protection circuit |
| CN201887425U (en) * | 2010-01-28 | 2011-06-29 | 黄华道 | Electricity leakage detection display protection circuit |
Cited By (51)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931633A (en) * | 2012-10-05 | 2013-02-13 | 黄松和 | Leakage protection circuit with real-time failure display function |
| CN103792867A (en) * | 2012-10-29 | 2014-05-14 | 株式会社万都 | Electronic control apparatus and method for checking reset function |
| CN103208776A (en) * | 2013-01-23 | 2013-07-17 | 陈泽 | Breaker circuit with fault self-detection function |
| CN103219702A (en) * | 2013-03-21 | 2013-07-24 | 温州市万盛电器有限公司 | Electric leakage detection protection circuit capable of performing timed self-detection |
| CN103219702B (en) * | 2013-03-21 | 2018-07-13 | 温州市万盛电器有限公司 | It can electric leakage detection protection circuit capable of performing timed self-detection |
| CN103401214A (en) * | 2013-07-17 | 2013-11-20 | 温州市万盛电器有限公司 | Electric leakage detection protection circuit with timing self-checking function |
| CN104422830A (en) * | 2013-08-27 | 2015-03-18 | 施耐德电器工业公司 | Leakage protector and leakage protection function detection method |
| CN104316820A (en) * | 2014-10-30 | 2015-01-28 | 冯江生 | Starter electric leakage detection hunting circuit |
| 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 |
| CN104935295A (en) * | 2015-07-01 | 2015-09-23 | 东南大学 | Gallium nitride-based clamped-beam RS trigger with low leakage current |
| CN104935295B (en) * | 2015-07-01 | 2017-06-09 | 东南大学 | The rest-set flip-flop of gallium nitride base low-leakage current clamped beam |
| CN107026427B (en) * | 2016-02-02 | 2019-10-18 | 益而益(集团)有限公司 | Use electric detection means |
| CN107026427A (en) * | 2016-02-02 | 2017-08-08 | 益而益(集团)有限公司 | Use electric detection means |
| CN109196746B (en) * | 2016-05-17 | 2020-07-07 | 三菱电机株式会社 | Earth leakage circuit breaker |
| CN109196746A (en) * | 2016-05-17 | 2019-01-11 | 三菱电机株式会社 | Leakage circuit breakers |
| CN106932717B (en) * | 2016-08-31 | 2023-02-10 | 中山市开普电器有限公司 | Comprehensive testing device for leakage protector |
| CN106932717A (en) * | 2016-08-31 | 2017-07-07 | 中山市开普电器有限公司 | A kind of earth leakage protective device comprehensive test device |
| CN107843807A (en) * | 2016-09-20 | 2018-03-27 | 丰郅(上海)新能源科技有限公司 | A kind of moment in Voltage Drop can turn off the monitoring system of power network in time |
| CN106253216A (en) * | 2016-09-26 | 2016-12-21 | 东莞市达昌实业有限公司 | A kind of can timing earth leakage protective device |
| CN106571617A (en) * | 2016-10-14 | 2017-04-19 | 无锡市海升电子科技有限公司 | Leakage protector capable of carrying out leakage detection automatically |
| CN106571617B (en) * | 2016-10-14 | 2019-02-05 | 安徽伊法拉电力科技有限公司 | A kind of earth leakage protective device that can carry out detection of electrical leakage automatically |
| CN108318727B (en) * | 2017-01-18 | 2020-11-27 | 中芯国际集成电路制造(上海)有限公司 | Test circuit and test method for standard unit leakage current |
| CN108318727A (en) * | 2017-01-18 | 2018-07-24 | 中芯国际集成电路制造(上海)有限公司 | A kind of test circuit and test method of standard block leakage current |
| CN106771532A (en) * | 2017-02-15 | 2017-05-31 | 许良炎 | A kind of earth leakage protective device transient current method of testing and test circuit |
| CN106771532B (en) * | 2017-02-15 | 2023-08-22 | 许良炎 | Method and circuit for testing instantaneous current of leakage protector |
| CN106711923A (en) * | 2017-02-17 | 2017-05-24 | 中领世能（天津）科技有限公司 | Isolation protection device and power supply system |
| CN106711922A (en) * | 2017-02-17 | 2017-05-24 | 中领世能（天津）科技有限公司 | Electrical shock protection device and power supply system |
| CN106711923B (en) * | 2017-02-17 | 2018-06-19 | 中领世能（天津）科技有限公司 | Isolating and protecting device and electric power system |
| CN106711922B (en) * | 2017-02-17 | 2018-06-08 | 中领世能（天津）科技有限公司 | Electrical shock protective device and electric power system |
| CN108631263A (en) * | 2017-03-21 | 2018-10-09 | 上海复旦微电子集团股份有限公司 | Ground-fault protection system |
| US20180278040A1 (en) * | 2017-03-21 | 2018-09-27 | Shanghai Fudan Microelectronics Group Company Limited | Ground Fault Protection System |
| US10923899B2 (en) | 2017-03-21 | 2021-02-16 | Shanghai Fudan Microelectronics Group Company Limited | Ground fault protection system |
| CN110352359A (en) * | 2017-04-21 | 2019-10-18 | 欧姆龙株式会社 | Leakage current computing device and electric leakage flow calculation methodologies |
| US11009559B2 (en) | 2017-04-21 | 2021-05-18 | Omron Corporation | Leakage current calculation method |
| CN110352359B (en) * | 2017-04-21 | 2021-05-14 | 欧姆龙株式会社 | Leakage current calculation method |
| CN107769159A (en) * | 2017-10-25 | 2018-03-06 | 浙江致威电子科技有限公司 | A kind of earth leakage protective device, electrical leakage detecting method and a kind of charging equipment |
| CN109755921A (en) * | 2017-11-08 | 2019-05-14 | 苏州益而益电器制造有限公司 | Ground-fault interrupter |
| CN107863754A (en) * | 2017-11-09 | 2018-03-30 | 南通盛洋电气有限公司 | A kind of transformer leakage stream automatic earthing electric installation |
| CN107863754B (en) * | 2017-11-09 | 2019-08-02 | 南通盛洋电气有限公司 | A kind of transformer leakage stream automatic earthing electric installation |
| CN108061838A (en) * | 2017-12-18 | 2018-05-22 | 淄博职业学院 | A kind of leakage tests method for ensureing user's normal electricity consumption |
| CN108061838B (en) * | 2017-12-18 | 2019-12-10 | 浙江长生滤清器有限公司 | Electric leakage test method for ensuring normal electricity consumption of user |
| CN108710080A (en) * | 2018-08-10 | 2018-10-26 | 江苏创能电器有限公司 | Leakage analog trial jump apparatus and system |
| CN110676808A (en) * | 2019-09-17 | 2020-01-10 | 深圳市晶扬电子有限公司 | Silicon controlled rectifier fault self-testing method, circuit, connector and electrical equipment |
| CN110676808B (en) * | 2019-09-17 | 2021-12-03 | 深圳市晶扬电子有限公司 | Silicon controlled rectifier fault self-testing method, circuit, connector and electrical equipment |
| CN111579970A (en) * | 2020-06-03 | 2020-08-25 | 广东韶钢松山股份有限公司 | Test circuit, test device and method for testing an electronic switchboard |
| CN111579970B (en) * | 2020-06-03 | 2022-06-10 | 广东韶钢松山股份有限公司 | Test circuit, test device and method for testing an electronic switchboard |
| CN113659519A (en) * | 2021-05-21 | 2021-11-16 | 上海蕴原电器有限公司 | Failure automatic monitoring circuit and ground fault circuit breaker using same |
| CN113848509A (en) * | 2021-09-16 | 2021-12-28 | 南京康尼新能源汽车零部件有限公司 | Charging equipment electric leakage self-checking device and self-checking method |
| CN114336549A (en) * | 2022-01-04 | 2022-04-12 | 中科能投科技集团有限公司 | Power supply and distribution energy-saving device system capable of changing power parameters |
| CN114336549B (en) * | 2022-01-04 | 2024-05-24 | 中科能投科技集团有限公司 | Power supply and distribution energy-saving device system capable of changing electric power parameters |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102306924B (en) | 2013-11-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102306924B (en) | Leakage detecting protection circuit capable of periodically automatically detecting function integrity | |
| CN102457042B (en) | Novel electricity leakage detection protection circuit | |
| CN104104055A (en) | Electric leakage detection protection circuit with timed self-checking and reverse wiring protection functions | |
| CN102540063A (en) | Testing device for alternating-current relays and testing method thereof | |
| CN103490377A (en) | Protection circuit for electric leakage detection | |
| CN202817702U (en) | Current leakage protection device | |
| CN102593785B (en) | Protective circuit for electric leakage detection | |
| CN103887764A (en) | Electric leakage detection and protection circuit integrating regular self-inspection and reversed wiring protection functions | |
| CN201113383Y (en) | Earth leakage protective circuit possessing end-to-life detection and display function | |
| CN102332700B (en) | Anti-lightning leakage detection and protection circuit | |
| CN103401214A (en) | Electric leakage detection protection circuit with timing self-checking function | |
| CN203217045U (en) | Silicon controlled rectifier state tester | |
| CN203084132U (en) | Cable short circuit detection device | |
| CN201422012Y (en) | Leakage detection and protection circuit with end-of-life detection and display function | |
| CN201887425U (en) | Electricity leakage detection display protection circuit | |
| CN2930044Y (en) | Automatically detecting if life terminal circuit for leakage protective socket | |
| CN202453450U (en) | Open-circuit excitation characteristic tester | |
| CN203643520U (en) | Optoelectronic coupler fault detector | |
| CN103323725B (en) | Low voltage switch box short circuit tester | |
| CN106483349B (en) | A kind of mutual inductor secondary side earthing detection protection system | |
| CN204536399U (en) | A kind of alterating and direct current detection system | |
| CN104422901A (en) | Control circuit and lamp test device with control circuit | |
| CN204214969U (en) | A kind of li-ion cell protection device checkout equipment | |
| CN102385022A (en) | Batch test device for conductive connecting wires | |
| CN201699393U (en) | Electric leakage detection protection circuit with display function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131120 |