CN104993451A - Very effective leakage protector - Google Patents
Very effective leakage protector Download PDFInfo
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- CN104993451A CN104993451A CN201510477324.9A CN201510477324A CN104993451A CN 104993451 A CN104993451 A CN 104993451A CN 201510477324 A CN201510477324 A CN 201510477324A CN 104993451 A CN104993451 A CN 104993451A
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- leakage protective
- earth leakage
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Abstract
The invention relates to a very effective leakage protector. The technical scheme adopted by the invention is that the inputs terminals of two or more than two electric leakage protection control circuit module detect and regulate the electric leakage signal in parallel, the output terminal performs series control driving and executes the circuit method to control AC power supply of the AC electric usage device; the electric leakage signal regulation circuit input terminal is connected to the secondary coil of the zero sequence current mutual inductor; the two parallel or more than two electric leakage protection control circuit module is powered by DC voltage V+1; the DC voltage V+0 supplies power to drive and the execution circuit. The beneficial effects of the invention is that the very efficient leakage protector not only can perform safety protection control on the electric leakage or electric shocking of the AC electric device during an normal operation, but also can enforce the driving execution circuit to cut off the AC power supply of the AC electric appliance, so that the AC electric appliance and the electric user are safe and the personal safety can be effectively protected under abnormal condition.
Description
Technical field
The present invention relates to a kind of electric shock or earth leakage protective device; in particular to a kind of AC power that automatically can disconnect AC electric appliance when abnormal failure occurs for itself; still can the earth leakage protective device of available protecting personal safety, referred to as the abnormal effective earth leakage protective device of one.
Background technology
In order to examine novelty of the present invention, designer has consulted a large amount of correlation technique data (professional book, newpapers and periodicals), also retrieved Patents document.Existing old-fashioned earth leakage protective device is of a great variety; to the electric leakage of load or electrical appliance or get an electric shock and all substantially can carry out available protecting control when normal; but generally potential fatal defect: if when abnormal failure occurs for itself; its defencive function will lose efficacy and form jumping of refusing out of control; meet electric leakage or get an electric shock and can not cut off the AC power of load or electrical appliance in time, also just can not protect electric shock person's safety.In reality, any electronic product is again abnormal failure can occur unavoidably, and such as: the secondary coil of zero sequence current mutual inductor H and tripping coil are that broken string or short trouble the most easily occur, or open circuit occurs in circuit somewhere or short trouble is also common.Now, meeting leakage current signal can not trigger control circuit action and being formed refuse to jump, and can not cut off load supplying in time, lose leakage protection, this is this field unheeded technical barrier of a specified duration.Therefore, whether existing earth leakage protective device all only has and arranges test button and check its safety protection function effective, and warns user's periodic inspection effect.Vacation that this just allows partial function lose efficacy peace earth leakage protective device, at electric online operation, to lie dormant fatal danger to the person but in actual use, user often ignores or forgets or be inconvenient to carry out validity check! On the contrary, people also think that it is safely and effectively by mistake, so existing old-fashioned earth leakage protective device, when extraordinary failure, electric shock casualty accident easily occurs.
Summary of the invention
The present invention mainly solves existing old-fashioned earth leakage protective device and special core control circuit thereof, often loses efficacy out of control because of abnormal failure own, and can not cut off load supplying in time, there is the technical problem of potential safety hazard, serious threat personal safety; There is provided a kind of when itself single fault, can not shielding failure be caused, also can force the AC power disconnecting AC electric appliance, still can carry out leaking electricity or " the abnormal effective earth leakage protective device " of electrical shock protection.
The technical scheme that the present invention takes is: with two or more than two the input of earth leakage protective control circuit module detect side by side electric leakage signal, output string control driving, executive circuit method control the AC power of AC electric appliance.Its concrete technical measures are: a kind of abnormal effective earth leakage protective device, comprise zero sequence current mutual inductor H and ac buck commutating DC stabilized voltage power supply (7), it is characterized in that: also comprise electric leakage signal regulating circuit (1), first module earth leakage protective control circuit module (2), second unit earth leakage protective control circuit module (3), garrison state setting circuit (4), complementary drive circuit (5), executive circuit (6); Wherein, first module earth leakage protective control circuit module (2) arranged side by side and second unit earth leakage protective control circuit module (3) can select any earth leakage protective control circuit chip as module core; also can be arranged side by side by two or more unit earth leakage protective control circuit module, primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in ring-shaped core hole
1, N
1the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core; two outputs of secondary coil n3 connect two inputs of electric leakage signal regulating circuit (1), and two outputs of described electric leakage signal regulating circuit (1) connect two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3) respectively
i1, V
i2), described first module earth leakage protective control circuit module (2) output (V
o1) connect an input of complementary drive circuit (5), described second unit earth leakage protective control circuit module (3) output (V
o2) connect another input of complementary drive circuit (5), what the output of described garrison state setting circuit (4) connected second unit earth leakage protective control circuit module (3) arranges end (V
s), two output (V of described complementary drive circuit (5)
c1, V
c2) connect executive circuit (6), the AC power (L, N) of two pairs of normally opened contact J connection control AC electric appliance of described executive circuit (6), two ac input ends of described ac buck commutating DC stabilized voltage power supply (7) are connected to the AC electric appliance side two alternating current wires L of relay normally open contact J
1, N
1on, the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 0end provides working power to complementary drive circuit (5), the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 1end provides working power, V to first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
+ 0voltage is higher than V
+ 1voltage.
Basic functional principle of the present invention is as follows:
After manually pressing start button QD; the normally opened contact J of executive circuit (6) repeat circuit maintains attracting state; continue the AC power (L, N) connecting ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance, circuit for electric leakage protector system and controlled AC electric appliance thereof obtain electric work.If controlled AC electric appliance normally works, without electric leakage or generation of getting an electric shock, by AC power cord L
1, N
1on size of current equal, direction is contrary; offsetting at the magnetic flux of zero sequence current mutual inductor H ring-shaped core internal induction is zero; therefore produce without alternating current or voltage at the two ends of zero sequence current mutual inductor H secondary coil n3, the output of electric leakage signal regulating circuit (1) also without electric leakage signal to two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
i1, V
i2), then output (the V of first module earth leakage protective control circuit module (2)
o1) export electronegative potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export high potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in conducting state, its two output (V
c1, V
c2) drive two couples of normally opened contact J of executive circuit (6) to connect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance, circuit for electric leakage protector system enters garrison state.
If controlled AC electric appliance electric leakage occurs or gets an electric shock, make AC power cord L
1, N
1the uneven alternating current of upper generation, produces induction magnetic flux, therefore just produces induced current or voltage signal at the two ends of zero sequence current mutual inductor H secondary coil n3 in zero sequence current mutual inductor H annular core.If this signal voltage is higher than set point, the output of electric leakage signal regulating circuit (1) just exports electric leakage signal to two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
i1, V
i2), now, the output (V of first module earth leakage protective control circuit module (2)
o1) export high potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export electronegative potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in cut-off state, its two output (V
c1, V
c2) control two pairs of normally opened contact J disconnection ac buck commutating DC stabilized voltage power supply (7) of executive circuit (6) and the AC power (L, N) of AC electric appliance; circuit for electric leakage protector system enters guard mode; and maintain off-position all the time; non-artificial can not Power resumption; thus, electric leakage/electric shock is made to obtain normal safe protection.
When there is broken string or short trouble in zero sequence current mutual inductor H secondary coil n3; because of the mating reaction of electric leakage signal regulating circuit (1) and first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3), the output (V of first module earth leakage protective control circuit module (2) can be made
o1) export high potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export electronegative potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in cut-off state, its two output (V
c1, V
c2) control two pairs of normally opened contact J disconnection ac buck commutating DC stabilized voltage power supply (7) of executive circuit (6) and the AC power (L, N) of AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Or when the relay J coil two ends in executive circuit (6) be short-circuited or open fault time; two of relay J couples of normally opened contact J can be forced to cut off the AC power of circuit for electric leakage protector system and controlled AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Due to core circuit of the present invention be with two or more than two the input of earth leakage protective control circuit module detect side by side electric leakage signal, output string control driving, executive circuit method control the AC power of AC electric appliance.When there is abnormal short circuit or open fault in certain element circuit somewhere; the disabler of this element circuit trigger protection may be caused; as long as another element circuit is still in normal condition; circuit for electric leakage protector system is still in normal condition, still effectively can carry out safeguard protection to electric leakage or electric shock.Certainly; if when there is the abnormal failure of certain combination in all earth leakage protective control circuit modules arranged side by side simultaneously; the creepage protection function of whole system can be caused to lose efficacy? key be each unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip itself whether there is anti-invalidation functions; as long as certain unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip have anti-invalidation functions, then circuit for electric leakage protector system just can ensure effectively to carry out safeguard protection when exception.
Therefore, the invention has the beneficial effects as follows:
Not only safety protection control can be carried out when normal work to the electric leakage of AC electric appliance or electric shock; and when abnormal failure occurs for itself; triggering can not be caused to lose efficacy out of control; also reliably protecting control can be carried out in time; positive drive executive circuit cuts off the AC power of AC electric appliance, and AC electric appliance and electric consumer are placed in safe condition.Certainly; if when there is the abnormal failure of certain combination in all earth leakage protective control circuit modules arranged side by side simultaneously; the creepage protection function of whole system can be caused to lose efficacy? key be each unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip itself whether there is anti-invalidation functions; as long as certain unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip have anti-invalidation functions, then circuit for electric leakage protector system just can ensure effectively to carry out safeguard protection when exception.
Accompanying drawing explanation
Fig. 1 is structural principle block diagram of the present invention;
Fig. 2 is the preferred embodiment of the invention 1 circuit theory diagrams;
Fig. 3 is the preferred embodiment of the invention 2 circuit theory diagrams.
In Fig. 1: H is zero sequence current mutual inductor; (1) be electric leakage signal regulating circuit; (2) be first module earth leakage protective control circuit module; (3) be second unit earth leakage protective control circuit module; (4) be garrison state setting circuit, (5) are complementary drive circuit, and (6) are executive circuit; (7) be ac buck commutating DC stabilized voltage power supply, J is two pairs of normally opened contacts of executive circuit repeat circuit.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Illustrating one, to structural principle block diagram of the present invention:
Fig. 1 is structural principle block diagram of the present invention; wherein; described first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3) can select any earth leakage protective control circuit chip as module core, and primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in ring-shaped core hole
1, N
1the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core; two outputs of secondary coil n3 connect two inputs of electric leakage signal regulating circuit (1), and two outputs of described electric leakage signal regulating circuit (1) connect two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3) respectively
i1, V
i2), described first module earth leakage protective control circuit module (2) output (V
o1) connect an input of complementary drive circuit (5), described second unit earth leakage protective control circuit module (3) output (V
o2) connect another input of complementary drive circuit (5), what the output of described garrison state setting circuit (4) connected second unit earth leakage protective control circuit module (3) arranges end (V
s), two output (V of described complementary drive circuit (5)
c1, V
c2) connect executive circuit (6), the AC power (L, N) of two pairs of normally opened contact J connection control AC electric appliance of described executive circuit (6), two ac input ends of described ac buck commutating DC stabilized voltage power supply (7) are connected to the AC electric appliance side two alternating current wires L of relay normally open contact J
1, N
1on, the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 0end provides working power to complementary drive circuit (5), the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 1end provides working power, V to first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
+ 0voltage is higher than V
+ 1voltage.
Fig. 1 operation principle of the present invention is as follows:
After manually pressing start button QD; the normally opened contact J of executive circuit (6) repeat circuit maintains attracting state; continue the AC power (L, N) connecting ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance, circuit for electric leakage protector system and controlled AC electric appliance thereof obtain electric work.If controlled AC electric appliance normally works, without electric leakage or generation of getting an electric shock, by AC power cord L
1, N
1on size of current equal, direction is contrary; offsetting at the magnetic flux of zero sequence current mutual inductor H ring-shaped core internal induction is zero; therefore produce without alternating current or voltage at the two ends of zero sequence current mutual inductor H secondary coil n3, the output of electric leakage signal regulating circuit (1) also without electric leakage signal to two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
i1, V
i2), then output (the V of first module earth leakage protective control circuit module (2)
o1) export electronegative potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export high potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in conducting state, its two output (V
c1, V
c2) drive two couples of normally opened contact J of executive circuit (6) to connect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance, circuit for electric leakage protector system enters garrison state.
If controlled AC electric appliance electric leakage occurs or gets an electric shock, make AC power cord L
1, N
1the uneven alternating current of upper generation, produces induction magnetic flux, therefore just produces induced current or voltage signal at the two ends of zero sequence current mutual inductor H secondary coil n3 in zero sequence current mutual inductor H annular core.If this signal voltage is higher than set point, the output of electric leakage signal regulating circuit (1) just exports electric leakage signal to two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
i1, V
i2), now, the output (V of first module earth leakage protective control circuit module (2)
o1) export high potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export electronegative potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in cut-off state, its two output (V
c1, V
c2) control two pairs of normally opened contact J disconnection ac buck commutating DC stabilized voltage power supply (7) of executive circuit (6) and the AC power (L, N) of AC electric appliance; circuit for electric leakage protector system enters guard mode; and maintain off-position all the time; non-artificial can not Power resumption; thus, electric leakage/electric shock is made to obtain normal safe protection.
When there is broken string or short trouble in zero sequence current mutual inductor H secondary coil n3; because of the mating reaction of electric leakage signal regulating circuit (1) and first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3), the output (V of first module earth leakage protective control circuit module (2) can be made
o1) export high potential, the output (V of second unit earth leakage protective control circuit module (3)
o2) export electronegative potential because of the inverting function of garrison state setting circuit (4), make complementary drive circuit (5) all be in cut-off state, its two output (V
c1, V
c2) control two pairs of normally opened contact J disconnection ac buck commutating DC stabilized voltage power supply (7) of executive circuit (6) and the AC power (L, N) of AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Or when the relay J coil two ends in executive circuit (6) be short-circuited or open fault time; two of relay J couples of normally opened contact J can be forced to cut off the AC power of circuit for electric leakage protector system and controlled AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Due to core circuit of the present invention be with two or more than two the input of earth leakage protective control circuit module detect side by side electric leakage signal, output string control driving, executive circuit method control the AC power of AC electric appliance.When there is abnormal short circuit or open fault in certain element circuit somewhere; the disabler of this element circuit trigger protection may be caused; as long as another element circuit is still in normal condition; circuit for electric leakage protector system is still in normal condition, still effectively can carry out safeguard protection to electric leakage or electric shock.Certainly; if when there is the abnormal failure of certain combination in all earth leakage protective control circuit modules arranged side by side simultaneously; the creepage protection function of whole system can be caused to lose efficacy? key be each unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip itself whether there is anti-invalidation functions; as long as certain unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip have anti-invalidation functions, then circuit for electric leakage protector system just can ensure effectively to carry out safeguard protection when exception.
Illustrating two, to embodiments of the invention 1 technical scheme:
(1) Fig. 2 is the preferred embodiment of the invention 1 circuit theory diagrams, wherein:
Described zero sequence current mutual inductor H is by ring-shaped core, primary coil n1, n2 and secondary coil n3 forms, and described electric leakage signal regulating circuit (1) is by resistance 2R1, 2R2, electric capacity 2C1 is formed, and described first module earth leakage protective control circuit module (2) is by earth leakage protective control circuit IC1 and electric capacity 2C2, 2C3, 2C4, 2C5 is formed, and described second unit earth leakage protective control circuit module (3) is by earth leakage protective control circuit IC2 and electric capacity 2C6, 2C7, 2C8, 2C9 is formed, the model of described earth leakage protective control circuit module core IC1 and earth leakage protective control circuit module core IC2 is all M54123 chip, or with the chip of M54123 chip functions equivalence, described garrison state setting circuit (4) is by triode 2VT3 and resistance 2R3, 2R5, 2R6 is formed, and described complementary drive circuit (5) is by triode 2VT1 and 2VT2, voltage stabilizing didoe 2WD1 and 2WD2, resistance 2R7 and 2R8 is formed, described executive circuit (6) is made up of relay 2J and diode 2D3, described ac buck commutating DC stabilized voltage power supply (7) is made up of ac buck rectification circuit and direct current regulation circuit, has two-stage VD V
+ 0and V
+ 1,
(2) embodiments of the invention 1 circuit connecting mode is as follows:
Primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in annular core hole
1, N
1, the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core, the two ends shunt capacitance 2C1 of described secondary coil n3, resistance 2R1, after 2R2 series connection, two ends are also parallel to the two ends of secondary coil n3 in addition, resistance 2R1, 2R2 serial connection point connects the 2nd pin of earth leakage protective control circuit IC1 and IC2, 1st pin of earth leakage protective control circuit IC1 and IC2 is connected to resistance 2R1 and electric capacity 2C1, 2C2, on the also tie-point of 2C6, one end of this Node connectedness secondary coil n3, the other end of electric capacity 2C2 connects the 3rd pin of earth leakage protective control circuit IC1, the other end of electric capacity 2C6 connects the 3rd pin of earth leakage protective control circuit IC2, the 3rd pin also connecting circuit earth terminal (GND) of earth leakage protective control circuit IC1 and IC2, the 4th of earth leakage protective control circuit IC1, 5 bipods are attempted by one end of electric capacity 2C3, the other end connecting circuit earth terminal (GND) of electric capacity 2C3, 4th pin of earth leakage protective control circuit IC2 connects one end of electric capacity 2C7 and resistance 2R3, the other end connecting circuit earth terminal (GND) of electric capacity 2C7, the other end connecting triode 2VT3 base stage of resistance 2R3, triode 2VT3 emitter connects voltage V
+ 1end, triode 2VT3 collector electrode contact resistance 2R5,2R6, namely the 5th pin of the other end connection earth leakage protective control circuit IC2 of resistance 2R5 arranges end (V
s), the other end connecting circuit earth terminal (GND) of resistance 2R6, electric capacity 2C8 is serially connected between the 6th pin of earth leakage protective control circuit IC2 and the 7th pin, 7th pin of earth leakage protective control circuit IC2 also connects electric capacity 2C9 and resistance 2R8, electric capacity 2C9 other end connecting circuit earth terminal (GND), the resistance 2R8 other end connects voltage stabilizing didoe 2WD2 negative pole, voltage stabilizing didoe 2WD2 positive pole connecting triode 2VT2 base stage, triode 2VT2 emitter connecting circuit earth terminal (GND), triode 2VT2 collector electrode connects one end of diode 2D3 positive pole and relay 2J coil, this tie point is as the second output (V of complementary drive circuit (5)
c2), the tie point of the other end of relay 2J coil and diode 2D3 negative pole and triode 2VT1 collector electrode, as the first output (V of complementary drive circuit (5)
c1), triode 2VT1 emitter connects voltage V
+ 0end, triode 2VT1 base stage connects voltage stabilizing didoe 2WD1 negative pole, voltage stabilizing didoe 2WD1 positive pole contact resistance 2R7, the resistance 2R7 other end connects the 7th pin of electric capacity 2C4,2C5 and earth leakage protective control circuit IC1, electric capacity 2C5 other end connecting circuit earth terminal (GND), the electric capacity 2C4 other end connects the 6th pin of earth leakage protective control circuit IC1, and the 8th pin of earth leakage protective control circuit IC1 with IC2 is all connected voltage V
+ 1end, two couples of normally opened contact 2J connection control AC electric appliance two ends (L of described executive circuit (6) repeat circuit 2J
1, N
1) AC power (L, N), QD is artificial start button, connects the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance after pressing two couples of normally opened contact 2J.
(3) embodiments of the invention 1 circuit working principle is as follows:
After manually pressing start button QD; two couples of normally opened contact 2J of executive circuit (6) repeat circuit 2J maintain attracting state; continue the AC power (L, N) connecting ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance, circuit for electric leakage protector system and controlled AC electric appliance thereof obtain electric work.If controlled AC electric appliance normally works, without electric leakage or generation of getting an electric shock, by AC power cord L
1, N
1on size of current equal, direction is contrary; offsetting at the magnetic flux of zero sequence current mutual inductor H ring-shaped core internal induction is zero; therefore produce without alternating current or voltage at the two ends of zero sequence current mutual inductor H secondary coil n3, the output of electric leakage signal regulating circuit (1) also gives the 1st pin (the input V of earth leakage protective control circuit IC1 and IC2 without electric leakage signal
i1) and the 2nd pin (input V
i2), then the 7th pin (the output V of earth leakage protective control circuit IC1
o1) export electronegative potential, drive triode 2VT1 conducting, again because of the inverting function of triode 2VT3, make the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export high potential; drive triode 2VT2 conducting; the adhesive of relay 2J coil electricity; its two couples of normally opened contact 2J connect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance, and circuit for electric leakage protector system enters garrison state.
If controlled AC electric appliance electric leakage occurs or gets an electric shock, make AC power cord L
1, N
1the uneven alternating current of upper generation, produces induction magnetic flux, therefore just produces induced current or voltage signal at the two ends of zero sequence current mutual inductor H secondary coil n3 in zero sequence current mutual inductor H annular core.If this signal voltage is higher than set point, electric leakage signal is connected through resistance 2R1,2R2 and is given the 1st pin (the input V of earth leakage protective control circuit IC1 and IC2 after dividing potential drop regulates
i1) and the 2nd pin (input V
i2), then after process is latched in the amplification of earth leakage protective control circuit IC1 and IC2 inside, time delay, by the 7th pin (the output V of earth leakage protective control circuit IC1
o1) export high potential, drive triode 2VT1 cut-off, again because of the inverting function of triode 2VT3, make the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export electronegative potential; drive triode 2VT2 cut-off; control relay 2J coil blackout discharges; its two couples of normally opened contact 2J disconnect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance; circuit for electric leakage protector system enters guard mode, and maintains off-position all the time, non-artificial can not Power resumption; thus, electric leakage/electric shock is made to obtain normal safe protection.
When broken string or short trouble occur zero sequence current mutual inductor H secondary coil n3, because of the internal circuit mating reaction of resistance 2R1,2R2 and earth leakage protective control circuit IC1 and IC2, the 7th pin (the output V of earth leakage protective control circuit IC1 can be made
o1) export high potential, drive triode 2VT1 cut-off, again because of the inverting function of triode 2VT3, make the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export electronegative potential; drive triode 2VT2 cut-off; control relay 2J coil blackout discharges; its two couples of normally opened contact J disconnect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Or when the relay 2J coil two ends in executive circuit (6) be short-circuited or open fault time; two of relay 2J couples of normally opened contact 2J can be forced to cut off the AC power of circuit for electric leakage protector system and controlled AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Due to core circuit of the present invention be with two or more than two the input of earth leakage protective control circuit module detect side by side electric leakage signal, output string control driving, executive circuit method control the AC power of AC electric appliance.When there is abnormal short circuit or open fault in certain element circuit somewhere; the disabler of this element circuit trigger protection may be caused; as long as another element circuit is still in normal condition; circuit for electric leakage protector system is still in normal condition, still effectively can carry out safeguard protection to electric leakage or electric shock.Certainly; if when there is the abnormal failure of certain combination in all earth leakage protective control circuit modules arranged side by side simultaneously; the creepage protection function of whole system can be caused to lose efficacy? key be each unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip itself whether there is anti-invalidation functions; as long as certain unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip have anti-invalidation functions, then circuit for electric leakage protector system just can ensure effectively to carry out safeguard protection when exception.
Illustrating three, to embodiments of the invention 2 technical scheme:
(1) Fig. 3 is the preferred embodiment of the invention 2 circuit theory diagrams, wherein:
Described zero sequence current mutual inductor H is by ring-shaped core, primary coil n1, n2 and secondary coil n3 forms, described electric leakage signal regulating circuit (1) is by resistance 3R1, 3R2 and electric capacity 3C1 is formed, described first module earth leakage protective control circuit module (2) is by earth leakage protective control circuit IC1 and electric capacity 3C2, 3C3, 3C4, 3C5 is formed, described second unit earth leakage protective control circuit module (3) is by earth leakage protective control circuit IC2 and electric capacity 3C6, 3C7, 3C8, 3C9 is formed, the model of described earth leakage protective control circuit module core IC1 and earth leakage protective control circuit module core IC2 is all M54123 chip, or with the chip of M54123 chip functions equivalence, described garrison state setting circuit (4) is by the 4th of earth leakage protective control circuit IC2, 5 bipods are directly in parallel to be formed, without the need to peripheral cell, described complementary drive circuit (5) is by triode 3VT1 and 3VT2, voltage stabilizing didoe 3WD1 and 3WD2, resistance 3R7 and 3R8 is formed, described executive circuit (6) is made up of relay 3J and diode 3D3, described ac buck commutating DC stabilized voltage power supply (7) is made up of ac buck rectification circuit and direct current regulation circuit, there is two-stage VD V
+ 0and V
+ 1,
(2) embodiments of the invention 2 circuit connecting mode is as follows:
Primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in annular core hole
1, N
1, the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core, the two ends shunt capacitance 3C1 of described secondary coil n3, resistance 3R1, after 3R2 series connection, two ends are also parallel to the two ends of secondary coil n3 in addition, resistance 3R1, 3R2 serial connection point connects the 1st pin and the electric capacity 3C6 of earth leakage protective control circuit IC1 the 2nd pin and earth leakage protective control circuit IC2, the other end of electric capacity 3C6 connects the 3rd pin of earth leakage protective control circuit IC2, 1st pin of earth leakage protective control circuit IC1 and the 2nd pin of earth leakage protective control circuit IC2 are attempted by resistance 3R1 and electric capacity 3C1, on the also tie-point of 3C2, one end of this Node connectedness secondary coil n3, the other end of electric capacity 3C2 connects the 3rd pin of earth leakage protective control circuit IC1, the 3rd pin also connecting circuit earth terminal (GND) of earth leakage protective control circuit IC1 and IC2, the 4th of earth leakage protective control circuit IC1, 5 bipods are attempted by one end of electric capacity 3C3, the other end connecting circuit earth terminal (GND) of electric capacity 3C3, 4th pin of earth leakage protective control circuit IC2 and the 5th pin are attempted by one end of electric capacity 3C7, as arranging end (V
s), the other end connecting circuit earth terminal (GND) of electric capacity 3C7, electric capacity 3C8 is serially connected between the 6th pin of earth leakage protective control circuit IC2 and the 7th pin, 7th pin of earth leakage protective control circuit IC2 also connects electric capacity 3C9 and resistance 3R8, electric capacity 3C9 other end connecting circuit earth terminal (GND), the resistance 3R8 other end connects voltage stabilizing didoe 3WD2 negative pole, voltage stabilizing didoe 3WD2 positive pole connecting triode 3VT2 base stage, triode 3VT2 emitter connecting circuit earth terminal (GND), triode 3VT2 collector electrode connects one end of diode 3D3 positive pole and relay 3J coil, this tie point is as the second output (V of complementary drive circuit (5)
c2), the tie point of the other end of relay 3J coil and diode 3D3 negative pole and triode 3VT1 collector electrode, as the first output (V of complementary drive circuit (5)
c1), triode 3VT1 emitter connects voltage V
+ 0end, triode 3VT1 base stage connects voltage stabilizing didoe 3WD1 negative pole, voltage stabilizing didoe 3WD1 positive pole contact resistance 3R7, the resistance 3R7 other end connects the 7th pin of electric capacity 3C4,3C5 and earth leakage protective control circuit IC1, electric capacity 3C5 other end connecting circuit earth terminal (GND), the electric capacity 3C4 other end connects the 6th pin of earth leakage protective control circuit IC1, and the 8th pin of earth leakage protective control circuit IC1 with IC2 is all connected voltage V
+ 1end, two couples of normally opened contact 3J connection control AC electric appliance two ends (L of described executive circuit (6) repeat circuit 3J
1, N
1) AC power (L, N), QD is artificial start button, connects the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance after pressing two couples of normally opened contact 3J.
(3) embodiments of the invention 2 circuit working principle is as follows:
After manually pressing start button QD; two couples of normally opened contact 3J of executive circuit (6) repeat circuit 3J maintain attracting state; continue the AC power (L, N) connecting ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance, circuit for electric leakage protector system and controlled AC electric appliance thereof obtain electric work.If controlled AC electric appliance normally works, without electric leakage or generation of getting an electric shock, by AC power cord L
1, N
1on size of current equal, direction is contrary; offsetting at the magnetic flux of zero sequence current mutual inductor H ring-shaped core internal induction is zero; therefore produce without alternating current or voltage at the two ends of zero sequence current mutual inductor H secondary coil n3, the output of electric leakage signal regulating circuit (1) also gives the 1st pin (the input V of earth leakage protective control circuit IC1 without electric leakage signal
i1) and the 2nd pin (input V
i2) and the 2nd pin (the input V of earth leakage protective control circuit IC2
i1) and the 1st pin (input V
i2), then the 7th pin (the output V of earth leakage protective control circuit IC1
o1) export electronegative potential, drive triode 3VT1 conducting, the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export high potential; drive triode 3VT2 conducting; the adhesive of relay 3J coil electricity; its two couples of normally opened contact 3J connect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance, and circuit for electric leakage protector system enters garrison state.
If controlled AC electric appliance electric leakage occurs or gets an electric shock, make AC power cord L
1, N
1the uneven alternating current of upper generation, produces induction magnetic flux, therefore just produces induced current or voltage signal at the two ends of zero sequence current mutual inductor H secondary coil n3 in zero sequence current mutual inductor H annular core.If this signal voltage is higher than set point, electric leakage signal is connected through resistance 3R1,3R2 and is given the 1st pin (the input V of earth leakage protective control circuit IC1 after dividing potential drop regulates
i1) and the 2nd pin (input V
i2) and the 2nd pin (the input V of earth leakage protective control circuit IC2
i1) and the 1st pin (input V
i2), then after process is latched in the amplification of earth leakage protective control circuit IC1 and IC2 inside, time delay, by the 7th pin (the output V of earth leakage protective control circuit IC1
o1) export high potential, drive triode 3VT1 cut-off, make the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export electronegative potential; drive triode 3VT2 cut-off; control relay 3J coil blackout discharges; its two couples of normally opened contact 3J disconnect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance; circuit for electric leakage protector system enters guard mode, and maintains off-position all the time, non-artificial can not Power resumption; thus, electric leakage/electric shock is made to obtain normal safe protection.
When broken string or short trouble occur zero sequence current mutual inductor H secondary coil n3, because of the internal circuit mating reaction of resistance 3R1,3R2 and earth leakage protective control circuit IC1 and IC2, the 7th pin (the output V of earth leakage protective control circuit IC1 can be made
o1) export high potential, drive triode 3VT1 cut-off, make the 7th pin (the output V of earth leakage protective control circuit IC2
o2) export electronegative potential; drive triode 3VT2 cut-off; control relay 3J coil blackout discharges; its two couples of normally opened contact 3J disconnect the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Or when the relay 3J coil two ends in executive circuit (6) be short-circuited or open fault time; two of relay 3J couples of normally opened contact 3J can be forced to cut off the AC power of circuit for electric leakage protector system and controlled AC electric appliance; circuit for electric leakage protector system enters guard mode equally; and maintain off-position all the time, non-artificial can not Power resumption.Thus, the auto-breaking when abnormal generation, just can avoid earth leakage protective device that the false running status of protecting that lost efficacy occurs, allow electric consumer avert danger.
Due to core circuit of the present invention be with two or more than two the input of earth leakage protective control circuit module detect side by side electric leakage signal, output string control driving, executive circuit method control the AC power of AC electric appliance.When there is abnormal short circuit or open fault in certain element circuit somewhere; the disabler of this element circuit trigger protection may be caused; as long as another element circuit is still in normal condition; circuit for electric leakage protector system is still in normal condition, still effectively can carry out safeguard protection to electric leakage or electric shock.Certainly; if when there is the abnormal failure of certain combination in all earth leakage protective control circuit modules arranged side by side simultaneously; the creepage protection function of whole system can be caused to lose efficacy? key be each unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip itself whether there is anti-invalidation functions; as long as certain unit earth leakage protective control circuit module or wherein earth leakage protective control circuit chip have anti-invalidation functions, then circuit for electric leakage protector system just can ensure effectively to carry out safeguard protection when exception.
Claims (3)
1. the effective earth leakage protective device of exception, comprise zero sequence current mutual inductor H and ac buck commutating DC stabilized voltage power supply (7), it is characterized in that: also comprise electric leakage signal regulating circuit (1), first module earth leakage protective control circuit module (2), second unit earth leakage protective control circuit module (3), garrison state setting circuit (4), complementary drive circuit (5), executive circuit (6); Wherein, described first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3) can select any earth leakage protective control circuit chip as module core, and primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in ring-shaped core hole
1, N
1the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core; two outputs of secondary coil n3 connect two inputs of electric leakage signal regulating circuit (1), and two outputs of described electric leakage signal regulating circuit (1) connect two input (V of first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3) respectively
i1, V
i2), described first module earth leakage protective control circuit module (2) output (V
o1) connect an input of complementary drive circuit (5), described second unit earth leakage protective control circuit module (3) output (V
o2) connect another input of complementary drive circuit (5), what the output of described garrison state setting circuit (4) connected second unit earth leakage protective control circuit module (3) arranges end (V
s), two output (V of described complementary drive circuit (5)
c1, V
c2) connect executive circuit (6), the AC power (L, N) of two pairs of normally opened contact J connection control AC electric appliance of described executive circuit (6), two ac input ends of described ac buck commutating DC stabilized voltage power supply (7) are connected to the AC electric appliance side two alternating current wires L of relay normally open contact J
1, N
1on, the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 0end provides working power to complementary drive circuit (5), the VD V of ac buck commutating DC stabilized voltage power supply (7)
+ 1end provides working power, V to first module earth leakage protective control circuit module (2) and second unit earth leakage protective control circuit module (3)
+ 0voltage is higher than V
+ 1voltage.
2. a kind of abnormal effective earth leakage protective device according to claim 1, is characterized in that: described zero sequence current mutual inductor H is by ring-shaped core, primary coil n1, n2 and secondary coil n3 forms, and described electric leakage signal regulating circuit (1) is by resistance 2R1, 2R2, electric capacity 2C1 is formed, and described first module earth leakage protective control circuit module (2) is by earth leakage protective control circuit IC1 and electric capacity 2C2, 2C3, 2C4, 2C5 is formed, and described second unit earth leakage protective control circuit module (3) is by earth leakage protective control circuit IC2 and electric capacity 2C6, 2C7, 2C8, 2C9 is formed, the model of described earth leakage protective control circuit module core IC1 and earth leakage protective control circuit module core IC2 is all M54123 chip, or with the chip of M54123 chip functions equivalence, described garrison state setting circuit (4) is by triode 2VT3 and resistance 2R3, 2R5, 2R6 is formed, and described complementary drive circuit (5) is by triode 2VT1 and 2VT2, voltage stabilizing didoe 2WD1 and 2WD2, resistance 2R7 and 2R8 is formed, described executive circuit (6) is made up of relay 2J and diode 2D3, described ac buck commutating DC stabilized voltage power supply (7) is made up of ac buck rectification circuit and direct current regulation circuit, has two-stage VD V
+ 0and V
+ 1, primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in annular core hole
1, N
1, the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core, the two ends shunt capacitance 2C1 of described secondary coil n3, resistance 2R1, after 2R2 series connection, two ends are also parallel to the two ends of secondary coil n3 in addition, resistance 2R1, 2R2 serial connection point connects the 2nd pin of earth leakage protective control circuit IC1 and IC2, 1st pin of earth leakage protective control circuit IC1 and IC2 is connected to resistance 2R1 and electric capacity 2C1, 2C2, on the also tie-point of 2C6, one end of this Node connectedness secondary coil n3, the other end of electric capacity 2C2 connects the 3rd pin of earth leakage protective control circuit IC1, the other end of electric capacity 2C6 connects the 3rd pin of earth leakage protective control circuit IC2, the 3rd pin also connecting circuit earth terminal (GND) of earth leakage protective control circuit IC1 and IC2, the 4th of earth leakage protective control circuit IC1, 5 bipods are attempted by one end of electric capacity 2C3, the other end connecting circuit earth terminal (GND) of electric capacity 2C3, 4th pin of earth leakage protective control circuit IC2 connects one end of electric capacity 2C7 and resistance 2R3, the other end connecting circuit earth terminal (GND) of electric capacity 2C7, the other end connecting triode 2VT3 base stage of resistance 2R3, triode 2VT3 emitter connects voltage V
+ 1end, triode 2VT3 collector electrode contact resistance 2R5,2R6, namely the 5th pin of the other end connection earth leakage protective control circuit IC2 of resistance 2R5 arranges end (V
s), the other end connecting circuit earth terminal (GND) of resistance 2R6, electric capacity 2C8 is serially connected between the 6th pin of earth leakage protective control circuit IC2 and the 7th pin, 7th pin of earth leakage protective control circuit IC2 also connects electric capacity 2C9 and resistance 2R8, electric capacity 2C9 other end connecting circuit earth terminal (GND), the resistance 2R8 other end connects voltage stabilizing didoe 2WD2 negative pole, voltage stabilizing didoe 2WD2 positive pole connecting triode 2VT2 base stage, triode 2VT2 emitter connecting circuit earth terminal (GND), triode 2VT2 collector electrode connects one end of diode 2D3 positive pole and relay 2J coil, this tie point is as the second output (V of complementary drive circuit (5)
c2), the tie point of the other end of relay 2J coil and diode 2D3 negative pole and triode 2VT1 collector electrode, as the first output (V of complementary drive circuit (5)
c1), triode 2VT1 emitter connects voltage V
+ 0end, triode 2VT1 base stage connects voltage stabilizing didoe 2WD1 negative pole, voltage stabilizing didoe 2WD1 positive pole contact resistance 2R7, the resistance 2R7 other end connects the 7th pin of electric capacity 2C4,2C5 and earth leakage protective control circuit IC1, electric capacity 2C5 other end connecting circuit earth terminal (GND), the electric capacity 2C4 other end connects the 6th pin of earth leakage protective control circuit IC1, and the 8th pin of earth leakage protective control circuit IC1 with IC2 is all connected voltage V
+ 1end, two couples of normally opened contact 2J connection control AC electric appliance two ends (L of described executive circuit (6) repeat circuit 2J
1, N
1) AC power (L, N), QD is artificial start button, connects the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance after pressing two couples of normally opened contact 2J.
3. a kind of abnormal effective earth leakage protective device according to claim 1, it is characterized in that: described zero sequence current mutual inductor H is by ring-shaped core, primary coil n1, n2 and secondary coil n3 forms, described electric leakage signal regulating circuit (1) is by resistance 3R1, 3R2 and electric capacity 3C1 is formed, described first module earth leakage protective control circuit module (2) is by earth leakage protective control circuit IC1 and electric capacity 3C2, 3C3, 3CA, 3C5 is formed, described second unit earth leakage protective control circuit module (3) is by earth leakage protective control circuit IC2 and electric capacity 3C6, 3C7, 3C8, 3C9 is formed, the model of described earth leakage protective control circuit module core IC1 and earth leakage protective control circuit module core IC2 is all M54123 chip, or with the chip of M54123 chip functions equivalence, described garrison state setting circuit (4) is by the 4th of earth leakage protective control circuit IC2, 5 bipods are directly in parallel to be formed, without the need to peripheral cell, described complementary drive circuit (5) is by triode 3VT1 and 3VT2, voltage stabilizing didoe 3WD1 and 3WD2, resistance 3R7 and 3R8 is formed, described executive circuit (6) is made up of relay 3J and diode 3D3, described ac buck commutating DC stabilized voltage power supply (7) is made up of ac buck rectification circuit and direct current regulation circuit, there is two-stage VD V
+ 0and V
+ 1, primary coil n1, n2 of described zero sequence current mutual inductor H are and penetrate two AC power cord L in annular core hole
1, N
1, the secondary coil n3 of zero sequence current mutual inductor H is around the coil on its ring-shaped core, the two ends shunt capacitance 3C1 of described secondary coil n3, resistance 3R1, after 3R2 series connection, two ends are also parallel to the two ends of secondary coil n3 in addition, resistance 3R1, 3R2 serial connection point connects the 1st pin and the electric capacity 3C6 of earth leakage protective control circuit IC1 the 2nd pin and earth leakage protective control circuit IC2, the other end of electric capacity 3C6 connects the 3rd pin of earth leakage protective control circuit IC2, 1st pin of earth leakage protective control circuit IC1 and the 2nd pin of earth leakage protective control circuit IC2 are attempted by resistance 3R1 and electric capacity 3C1, on the also tie-point of 3C2, one end of this Node connectedness secondary coil n3, the other end of electric capacity 3C2 connects the 3rd pin of earth leakage protective control circuit IC1, the 3rd pin also connecting circuit earth terminal (GND) of earth leakage protective control circuit IC1 and IC2, the 4th of earth leakage protective control circuit IC1, 5 bipods are attempted by one end of electric capacity 3C3, the other end connecting circuit earth terminal (GND) of electric capacity 3C3, 4th pin of earth leakage protective control circuit IC2 and the 5th pin are attempted by one end of electric capacity 3C7, as arranging end (V
s), the other end connecting circuit earth terminal (GND) of electric capacity 3C7, electric capacity 3C8 is serially connected between the 6th pin of earth leakage protective control circuit IC2 and the 7th pin, 7th pin of earth leakage protective control circuit IC2 also connects electric capacity 3C9 and resistance 3R8, electric capacity 3C9 other end connecting circuit earth terminal (GND), the resistance 3R8 other end connects voltage stabilizing didoe 3WD2 negative pole, voltage stabilizing didoe 3WD2 positive pole connecting triode 3VT2 base stage, triode 3VT2 emitter connecting circuit earth terminal (GND), triode 3VT2 collector electrode connects one end of diode 3D3 positive pole and relay 3J coil, this tie point is as the second output (V of complementary drive circuit (5)
c2), the tie point of the other end of relay 3J coil and diode 3D3 negative pole and triode 3VT1 collector electrode, as the first output (V of complementary drive circuit (5)
c1), triode 3VT1 emitter connects voltage V
+ 0end, triode 3VT1 base stage connects voltage stabilizing didoe 3WD1 negative pole, voltage stabilizing didoe 3WD1 positive pole contact resistance 3R7, the resistance 3R7 other end connects the 7th pin of electric capacity 3C4,3C5 and earth leakage protective control circuit IC1, electric capacity 3C5 other end connecting circuit earth terminal (GND), the electric capacity 3CA other end connects the 6th pin of earth leakage protective control circuit IC1, and the 8th pin of earth leakage protective control circuit IC1 with IC2 is all connected voltage V
+ 1end, two couples of normally opened contact 3J connection control AC electric appliance two ends (L of described executive circuit (6) repeat circuit 3J
1, N
1) AC power (L, N), QD is artificial start button, connects the AC power (L, N) of ac buck commutating DC stabilized voltage power supply (7) and controlled AC electric appliance after pressing two couples of normally opened contact 3J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477324.9A CN104993451A (en) | 2015-08-03 | 2015-08-03 | Very effective leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510477324.9A CN104993451A (en) | 2015-08-03 | 2015-08-03 | Very effective leakage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104993451A true CN104993451A (en) | 2015-10-21 |
Family
ID=54305226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510477324.9A Withdrawn CN104993451A (en) | 2015-08-03 | 2015-08-03 | Very effective leakage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104993451A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
| CN109390906A (en) * | 2017-08-02 | 2019-02-26 | 惠而浦（中国）股份有限公司 | A kind of household electrical appliance leakage protection circuit |
| CN112865015A (en) * | 2021-03-25 | 2021-05-28 | 浙江深华颖智能科技有限公司 | Sensor with high-voltage zero-sequence protection and measurement functions |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773994A (en) * | 2017-01-09 | 2017-05-31 | 浙江新涛电子科技股份有限公司 | The circuit and control method of a kind of SECO PE ground wires |
| CN106773994B (en) * | 2017-01-09 | 2023-08-04 | 浙江新涛电子科技有限公司 | Circuit for controlling PE ground wire in time sequence and control method |
| CN109390906A (en) * | 2017-08-02 | 2019-02-26 | 惠而浦（中国）股份有限公司 | A kind of household electrical appliance leakage protection circuit |
| CN109390906B (en) * | 2017-08-02 | 2024-02-09 | 惠而浦（中国）股份有限公司 | Leakage protection circuit for household appliances |
| CN112865015A (en) * | 2021-03-25 | 2021-05-28 | 浙江深华颖智能科技有限公司 | Sensor with high-voltage zero-sequence protection and measurement functions |
| CN112865015B (en) * | 2021-03-25 | 2022-06-24 | 江苏舒茨测控设备股份有限公司 | Sensor with high-voltage zero-sequence protection and measurement functions |
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Application publication date: 20151021 |
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