CN201774227U - Electric leakage detection protection circuit - Google Patents
Electric leakage detection protection circuit Download PDFInfo
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- CN201774227U CN201774227U CN2010202874322U CN201020287432U CN201774227U CN 201774227 U CN201774227 U CN 201774227U CN 2010202874322 U CN2010202874322 U CN 2010202874322U CN 201020287432 U CN201020287432 U CN 201020287432U CN 201774227 U CN201774227 U CN 201774227U
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- 238000001514 detection method Methods 0.000 title claims abstract description 145
- 230000006698 induction Effects 0.000 claims abstract description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 38
- 229910052751 metal Inorganic materials 0.000 claims description 38
- 238000004088 simulation Methods 0.000 claims description 29
- 150000002739 metals Chemical class 0.000 claims description 18
- 239000003086 colorant Substances 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000006870 function Effects 0.000 description 21
- 206010011906 Death Diseases 0.000 description 7
- 241000755266 Kathetostoma giganteum Species 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
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- 230000001681 protective effect Effects 0.000 description 1
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Abstract
The utility model discloses an electric leakage detection protection circuit, which is characterized by further comprising a service life termination detection switch and a latch switch. The service life termination detection switch and the latch switch are controlled by an electromagnetic latch mechanism, an anode of a silicon controlled thyristor is connected with a live wire of a power input end via the latch switch and a tripping coil provided with an iron core inside, a cathode of the silicon controlled thyristor is connected with a zero wire of the power input end, the service life termination detection switch is connected in series with a current limiting resistor to form an analog current leakage generating circuit for realizing the service life termination detection function, and one end of the analog current leakage generating circuit is connected with a zero wire of the power input end penetrating through an induction coil and a self-excitation coil while the other end is connected with the live wire of the power input end via the tripping coil. The service termination detection switch is connected and the latch switch is disconnected when a reset button is in a tripping state, the service life termination detection switch is disconnected and the latch switch is connected when the reset button is reset, and the latch switch is connected and the service life termination detection switch is disconnected when the reset button is pressed.
Description
Technical field
The utility model relates to a kind of attaching plug or supply socket or interior circuit with detection of electrical leakage, demonstration, defencive function of mains switch with creepage protection function that be installed in.
Background technology
Continuous development along with the supply socket with creepage protection function (being called for short GFCI), attaching plug, mains switch industry; people require more and more higher to supply socket, the function of attaching plug, the safety in utilization with creepage protection function, particularly export to supply socket, the attaching plug of the U.S..Supply socket, attaching plug that the U.S. requires to export to the U.S. must have life end checking function, before use, supply socket, attaching plug must be from detecting, when its end-of-life, reset button on supply socket, the attaching plug must can not reset all the time, and supply socket, attaching plug do not have power supply output.This makes the insider constantly be devoted to study, improves the leakage current detection protection circuit that is installed in supply socket, attaching plug, the mains switch, make its strength with better function, use safer.
Fig. 1 is a kind of common leakage current detection protection circuit that is installed in attaching plug, supply socket, the mains switch.As shown in the figure, this leakage current detection protection circuit includes a simulation leakage current generating circuit that is used to realize life end checking function.This simulation leakage current generating circuit is made of the current-limiting resistance R10 and the R11 of series connection, one end of simulation leakage current generating circuit with pass the induction coil L1 that is used to detect leakage current power input zero line and link to each other with the self-excitation coil L2 that is used to detect the low resistance fault, the tripping coil SOL of the other end through being built-in with iron core links to each other with the power input live wire.After the power input of leakage current detection protection circuit and power firestreak, zero line connect; because the power input live wire links to each other with the power input zero line that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R10, the R11 of tripping coil SOL, series connection; form normal closed-loop path, produce the simulation leakage current automatically.At this moment; if the supply socket of this leakage current detection protection circuit of this leakage current detection protection circuit/be built-in with attaching plug mains switch do not have end-of-life; then; be built in the iron core action in the tripping coil SOL; make attaching plug supply socket mechanical device action in the mains switch; reset button can reset, supply socket mains switch attaching plug power supply output is arranged, finish life end checking function.If the supply socket of this leakage current detection protection circuit of this leakage current detection protection circuit/be built-in with attaching plug the mains switch end-of-life; then; the iron core that is built in the tripping coil SOL is failure to actuate; attaching plug supply socket mechanical device in the mains switch be failure to actuate; reset button does not reset all the time, supply socket mains switch attaching plug do not have power supply output.
But; also there is fatal shortcoming in leakage current detection protection circuit shown in Figure 1: after the power input of leakage current detection protection circuit and power firestreak, zero line connect; in the several seconds that produces the simulation leakage current, be used to produce the current-limiting resistance R10 and the R11 that simulate leakage current and burnt.This makes leakage current detection protection circuit shown in Figure 1 can only finish life-span stop detection one time; if the user use for the second time this leakage current detection protection circuit is installed mains switch supply socket attaching plug; or with mains switch supply socket attaching plug unload and be installed in other places, this leakage current detection protection circuit will not have life end checking function.
In addition and since be equipped with leakage current detection protection circuit shown in Figure 1 supply socket attaching plug the reset button of mains switch, its bottom be sharp coniform, so as long as push reset button RESET, reset button RESET just can reset.This make when installer's mistake power firestreak, zero line are connected to leakage current detection protection circuit power output end LOAD the time; the power input LINE of this leakage current detection protection circuit and the supply hub on supply socket surface all have power supply output; do not have the earth leakage protective effect; do not have the function that prevents the reverse wiring mistake; in case the electric leakage situation occurs; its automatic trip or cut off the electricity supply never, this is a danger close, can mislead the user simultaneously.
In sum, there is defective in the fail safe of leakage current detection protection circuit shown in Figure 1.
The utility model content
In view of the foregoing, main purpose of the present utility model provides the good leakage current detection protection circuit of a kind of fail safe, and this leakage current detection protection circuit has life end checking function all the time.
Another purpose of the present utility model provides a kind of leakage current detection protection circuit with anti-wiring error function.
A purpose more of the present utility model provides a kind of leakage current detection protection circuit with Presentation Function.
For achieving the above object, the utility model is by the following technical solutions: a kind of have a leakage current detection protection circuit that detects Presentation Function, it comprise the induction coil that is used to detect leakage current, the self-excitation coil, the control chip that are used to detect the low resistance fault, the tripping coil that is built-in with iron core, controllable silicon, with the major loop switch of reset button interlock; It is characterized in that:
This leakage current detection protection circuit also comprises the life-span stop detection switch and the anchor switch that are subjected to the control of electromagnetism latching device;
Described silicon controlled anode links to each other with the live wire of power input through described anchor switch, the tripping coil that is built-in with iron core; Described silicon controlled negative electrode links to each other with the zero line of power input;
Described life-span stop detection switch and current-limiting resistance series connection are configured for finishing the simulation leakage current generating circuit of life end checking function; One end of this simulation leakage current generating circuit links to each other with the power input zero line that passes described induction coil and self-excitation coil, and the other end links to each other with the power input live wire through described tripping coil;
When reset button is in trip status, described life-span stop detection switch closure, anchor switch disconnects; After reset button resetted, described life-span stop detection switch disconnected, the anchor switch closure, and when reset button is pressed, the anchor switch closure, the life-span stop detection switch changes disconnection into by closure.
In another embodiment of the present utility model, described life-span stop detection switch and current-limiting resistance series connection are configured for finishing the simulation leakage current generating circuit of life end checking function; One end of this simulation leakage current generating circuit links to each other with the power input zero line, and the other end links to each other with the power input live wire that passes described induction coil and self-excitation coil through described tripping coil;
When reset button is in trip status, described life-span stop detection switch closure, anchor switch disconnects; After reset button resetted, described life-span stop detection switch disconnected, the anchor switch closure, and when reset button is pressed, the anchor switch closure, the life-span stop detection switch changes disconnection into by closure.
The utility model leakage current detection protection circuit also comprises a display circuit, and this display circuit is by dichromatic LED, and diode and current-limiting resistance constitute;
An anode of described dichromatic LED links to each other with an end of described anchor switch through diode, resistance; The common cathode end of described dichromatic LED links to each other with the other end of described anchor switch and described silicon controlled anode; Another anode of described dichromatic LED links to each other with described silicon controlled negative electrode through diode, resistance;
After reset button resetted, described anchor switch closure had only a kind of light-emitting diode of color bright in the described dichromatic LED; After reset button was threaded off, described anchor switch disconnected, and the light-emitting diode of two kinds of colors in the dichromatic LED is all bright; When this leakage current detection protection circuit wiring was correct, the light-emitting diode of two kinds of colors in the dichromatic LED was all bright, otherwise when this leakage current detection protection circuit wiring error, the light-emitting diode of two kinds of colors in the dichromatic LED does not all work.
In another embodiment of the present utility model, leakage current detection protection circuit comprises the two-way display circuit, wherein
No. one display circuit is made of the current-limiting resistance that is one another in series, diode, normal indicator light of life-span, is connected in parallel on the two ends of described anchor switch;
Another road display circuit is made of the current-limiting resistance that is one another in series, diode and electric power output indicator, is connected in parallel between leakage current detection protection circuit output live wire and the zero line;
When normal and reset button was in trip status when the leakage current detection protection circuit function, described anchor switch was in off-state, and the described life-span, normal indicator light was luminous, and described electric power output indicator does not work; After reset button resets, described anchor switch closure, the described life-span, normal indicator light extinguished, and described electric power output indicator is bright.
The utility model leakage current detection protection circuit also comprises two groups of point discharge sheet metals; Wherein
One group of point discharge sheet metal is arranged on power input zero line and the power input zero line place of passing described induction coil, self-excitation coil, and two point discharge sheet metals are staggered relatively;
The power input zero line place that another group point discharge sheet metal is arranged on the power input live wire and passes described induction coil, self-excitation coil, two point discharge sheet metals are staggered relatively.
In another embodiment of the utility model, one group of point discharge sheet metal in two groups of point discharge sheet metals is arranged on the power input zero line and passes the power input live wire place of described induction coil, self-excitation coil, and two point discharge sheet metals are staggered relatively;
Another group point discharge sheet metal is arranged on power input live wire and the zero line place of passing described induction coil, self-excitation coil, and two point discharge sheet metals are staggered relatively.
Description of drawings
Fig. 1 is known leakage current detection protection circuit physical circuit figure;
Fig. 2 is the utility model leakage current detection protection circuit physical circuit figure ();
Fig. 3 is the utility model leakage current detection protection circuit physical circuit figure (two);
Fig. 4 is the utility model leakage current detection protection circuit physical circuit figure (three);
Fig. 5 is the utility model leakage current detection protection circuit physical circuit figure (four);
Fig. 6 is the utility model leakage current detection protection circuit physical circuit figure (five);
Fig. 7 is the utility model leakage current detection protection circuit physical circuit figure (six).
Embodiment
As shown in Figure 2, the disclosed leakage current detection protection circuit of the utility model mainly comprise the induction coil L1, the self-excitation coil L2 that is used to detect the low resistance fault, control chip IC1 (model RV4141AM), the tripping coil SOL that is built-in with iron core, the controllable silicon V2 that are used to detect leakage current, be subjected to the control of electromagnetism latching device life-span stop detection K switch 4, anchor switch K2, with major loop K switch 1-1, the K1-2 of reset button interlock.When reset button RESET is in trip status, life-span stop detection K switch 4 closures, anchor switch K2 disconnects; After reset button RESET resetted, life-span stop detection K switch 4 disconnected anchor switch K2 closure.
The live wire of power input LINE, zero line pass the induction coil L1 that is used to detect leakage current, the self-excitation coil L2 that is used to detect the low resistance fault, link to each other with live wire, the zero line of power output end LOAD through major loop K switch 1-1, K1-2 with the reset button interlock.
The induction coil L1 that is used to detect leakage current links to each other with the detection signal input 1,2,3,8 of control chip IC1 with the signal output part of the self-excitation coil L2 that is used to detect the low resistance fault, the control signal output ends 7 of control chip IC1 links to each other through the gate pole of resistance R 5 with controllable silicon V2, and the anode of controllable silicon V2 links to each other with power input LINE live wire through anchor switch K2, the tripping coil SOL that is built-in with iron core; The negative electrode of controllable silicon V2 links to each other with the power input zero line.
Leakage current detection protection circuit shown in Figure 2 comprises that also one is used to finish the simulation leakage current generating circuit of life end checking function; this simulation leakage current generating circuit is made of current-limiting resistance R10, R11 and the life-span stop detection K switch 4 of series connection; one end of simulation leakage current generating circuit with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the other end links to each other with the power input live wire through tripping coil SOL.
After the power input LINE of leakage current detection protection circuit and power firestreak, zero line in the wall connect; the power input live wire is through tripping coil SOL, closed life-span stop detection K switch 4, current-limiting resistance R10, R11 and pass induction coil L1 and the power input zero line of self-excitation coil L2 links to each other; form the closed-loop path, produce the simulation leakage current.Press reset button, anchor switch K2 closure, tripping coil SOL produces magnetic field, and built-in iron core action wherein disconnects life-span stop detection K switch 4, and the simulation leakage current disappears.
If leakage current detection protection circuit does not have end-of-life; the electric leakage signal used of induction coil L1 and this simulation test of self-excitation coil L2 perception then; output signal to control chip IC1; control chip IC1 exports control signal; make controllable silicon V2 conducting; by supply socket mains switch mechanical device in the attaching plug, reset button RESET is resetted.
If the leakage current detection protection circuit end-of-life, then control chip IC1 does not export control signal, controllable silicon V2 not conducting all the time, and reset button RESET can not reset all the time.
Because the utility model is in series with a life-span stop detection K switch 4 in simulation leakage current generating circuit.After the simulation leakage current generating is connected; closure state through anchor switch K2; 4 automatic disconnections of life-span stop detection K switch make current-limiting resistance R10, R11 not burnt or disconnect, and make the disclosed leakage current detection protection circuit of the utility model can carry out life-span stop detection repeatedly.
In addition, the utility model also bottom of reset button RESET is set to flat-head shape, and this design can prevent direction wiring error effectively.When the installer mistakenly with the power firestreak in the power supply of leakage current detection protection circuit output LOAD and the wall, when zero line links to each other; because simulation leakage current generating circuit does not produce the simulation leakage current; do not finish life-span stop detection; so; even push reset button RESET; because the bottom of reset button is a flat-head shape; so; reset button can't reset; the power input LINE of leakage current detection protection circuit and the output plughole of output all do not have power supply output; thereby, prevent direction wiring error effectively.
As shown in Figure 2, the utility model also comprises a display circuit, and this display circuit is by dichromatic LED LED-G, LED-R, and diode V4, V5 and current-limiting resistance R8, R9, R12 constitute.The anode of dichromatic LED LED-G, LED-R links to each other with the end of anchor switch K2 through diode V4, resistance R 8; The common cathode end of dichromatic LED links to each other with the anode of the other end of anchor switch K2 and controllable silicon V2; Another anode of dichromatic LED links to each other with the negative electrode of controllable silicon V2 through diode V5, resistance R 9.Current-limiting resistance R12 is in parallel with anchor switch K2.
Reset button RESET rear catch K switch 2 closures that reset have only a kind of light-emitting diode of color bright in the dichromatic LED, LED-G does not work in the present embodiment, LED-R is luminous, shows red or other color.Reset button dropout rear catch K switch 2 disconnects, and the light-emitting diode of two kinds of colors in the dichromatic LED is all bright, and LED-G, LED-R are bright in the present embodiment, shows yellow.When this leakage current detection protection circuit wiring was correct, the light-emitting diode of two kinds of colors in the dichromatic LED was all bright, otherwise if during this leakage current detection protection circuit wiring error, the light-emitting diode of two kinds of colors in the dichromatic LED does not all work.
As shown in Figure 2, the utility model also is provided with a pair of point discharge sheet metal M1, M2 at the power input zero line with the power input zero line place of passing induction coil L1, self-excitation coil L2, and two point discharge sheet metal M1, M2 are staggered relatively.The utility model also is provided with a pair of point discharge sheet metal M3, M4 at the power input live wire with the power input zero line place of passing induction coil L1, self-excitation coil L2, and two point discharge sheet metal M3, M4 are staggered relatively.
Fig. 3 is the another physical circuit figure of the utility model leakage current detection protection circuit.The operation principle of leakage current detection protection circuit shown in Figure 3 and leakage current detection protection circuit shown in Figure 2 is identical; its difference is: an end of the simulation leakage current generating circuit in the leakage current detection protection circuit shown in Figure 3 (current-limiting resistance R10, R11 by series connection constitute with life-span stop detection K switch 4) links to each other with the power input live wire HOT that passes induction coil L1, self-excitation coil L2 through tripping coil SOL, and the other end links to each other with the power input zero line.
After the power input LINE of leakage current detection protection circuit and power firestreak, zero line in the wall connect; the power input live wire passes induction coil L1 and self-excitation coil L2; link to each other with the power input zero line through tripping coil SOL, closed life-span stop detection K switch 4, current-limiting resistance R11, R10; form the closed-loop path, produce the simulation leakage current.Press reset button, anchor switch K2 closure, tripping coil SOL produces magnetic field, and built-in iron core action wherein disconnects life-span stop detection K switch 4, and the simulation leakage current disappears.
If leakage current detection protection circuit does not have end-of-life; the electric leakage signal used of induction coil L1 and this simulation test of self-excitation coil L2 perception then; output signal to control chip IC1; control chip IC1 exports control signal; make controllable silicon V2 conducting; by supply socket mains switch mechanical device in the attaching plug, reset button RESET is resetted.
If the leakage current detection protection circuit end-of-life, then control chip IC1 does not export control signal, controllable silicon V2 not conducting all the time, and reset button RESET can not reset all the time.
Leakage current detection protection circuit shown in Figure 3 is provided with a pair of point discharge sheet metal M1, M2 at the power input zero line with the power input live wire place of passing induction coil L1, self-excitation coil L2, and two point discharge sheet metal M1, M2 are staggered relatively; Also be provided with a pair of point discharge sheet metal M3, M4 at power input live wire that passes induction coil L1, self-excitation coil L2 and zero line place, two point discharge sheet metal M3, M4 are staggered relatively.
Fig. 4 is the another physical circuit figure of the utility model leakage current detection protection circuit.The operation principle of leakage current detection protection circuit shown in Figure 4 and leakage current detection protection circuit shown in Figure 3 is identical, and circuit structure is basic identical, and its difference is: leakage current detection protection circuit shown in Figure 4 has increased by one road power output end again.
Fig. 5, Fig. 6 are the another physical circuit figure of the utility model leakage current detection protection circuit.The operation principle of leakage current detection protection circuit shown in Figure 5 and leakage current detection protection circuit shown in Figure 2 is identical, and its difference is, and: Fig. 5 is different with the display circuit of leakage current detection protection circuit shown in Figure 2 with the display circuit in the leakage current detection protection circuit shown in Figure 6.
Fig. 5 and leakage current detection protection circuit shown in Figure 6 comprise the two-way display circuit, and No. one display circuit is made of the current-limiting resistance R9 that is one another in series, diode V6, normal indicator light V5 of life-span, is connected in parallel on the two ends of anchor switch K2; Another road display circuit is made of the current-limiting resistance R8 that is one another in series, diode V4 and electric power output indicator V3, is connected in parallel between leakage current detection protection circuit output live wire and the zero line.
When normal and reset button was in trip status when the leakage current detection protection circuit function, because anchor switch K2 off-state, the life-span, normal indicator light V5 was luminous; After reset button resetted, because of anchor switch K2 closure, the life-span, normal indicator light V5 extinguished, and V3 is bright for the electric power output indicator.
Fig. 7 is applied to physical circuit figure in the attaching plug for the utility model, and its operation principle and circuit structure and leakage current detection protection circuit shown in Figure 2 are basic identical.
In sum, because the utility model adopts above technical scheme, so the disclosed leakage current detection protection circuit of the utility model has following outstanding advantage: safe and reliable.
Because the utility model has increased by a life-span stop detection K switch 4 in simulation leakage current generating circuit; producing the simulation leakage current after the several seconds; this switch disconnects; avoid current-limiting resistance to be burnt; make leakage current detection protection circuit have life end checking function all the time; thereby, improve the security reliability of leakage current detection protection circuit greatly.
The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.
Claims (10)
1. leakage current detection protection circuit, it comprise the induction coil (L1) that is used to detect leakage current, the self-excitation coil (L2) that is used to detect the low resistance fault, control chip (IC1), the tripping coil (SOL) that is built-in with iron core, controllable silicon (V2), with the major loop switch (K1-1, K1-2) of reset button interlock; It is characterized in that:
This leakage current detection protection circuit also comprises the life-span stop detection switch (K4) and the anchor switch (K2) that are subjected to the control of electromagnetism latching device;
The anode of described controllable silicon (V2) links to each other with the live wire of power input through described anchor switch (K2), the tripping coil (SOL) that is built-in with iron core; The negative electrode of described controllable silicon (V2) links to each other with the zero line of power input;
Described life-span stop detection switch (K4) and current-limiting resistance (R10, R11) series connection is configured for finishing the simulation leakage current generating circuit of life end checking function; One end of this simulation leakage current generating circuit with pass the power input zero line of described induction coil (L1) and link to each other with self-excitation coil (L2), the other end links to each other with the power input live wire through described tripping coil (SOL);
When reset button is in trip status, described life-span stop detection switch (K4) closure, anchor switch (K2) disconnects; After reset button resetted, described life-span stop detection switch (K4) disconnected, anchor switch (K2) closure; When reset button is pressed, described anchor switch (K2) closure, life-span stop detection switch (K4) changes disconnection into by closure.
2. leakage current detection protection circuit according to claim 1, it is characterized in that: this leakage current detection protection circuit also comprises a display circuit, this display circuit is by dichromatic LED (LED-G, LED-R), and diode (V4), (V5) and current-limiting resistance (R8, R9, R12) constitute;
An anode of described dichromatic LED (LED-G, LED-R) links to each other with an end of described anchor switch (K2) through diode (V4), resistance (R8); The common cathode end of described dichromatic LED links to each other with the other end of described anchor switch (K2) and the anode of described controllable silicon (V2); Another anode of described dichromatic LED links to each other with the negative electrode of described controllable silicon (V2) through diode (V5), resistance (R9);
After reset button resetted, described anchor switch (K2) closure had only a kind of light-emitting diode of color bright in the described dichromatic LED; After reset button was threaded off, described anchor switch (K2) disconnected, and the light-emitting diode of two kinds of colors in the dichromatic LED is all bright; When this leakage current detection protection circuit wiring was correct, the light-emitting diode of two kinds of colors in the dichromatic LED was all bright, otherwise when this leakage current detection protection circuit wiring error, the light-emitting diode of two kinds of colors in the dichromatic LED does not all work.
3. leakage current detection protection circuit according to claim 1 is characterized in that: this leakage current detection protection circuit comprises the two-way display circuit, wherein
No. one display circuit is made of the current-limiting resistance that is one another in series (R9), diode (V6), normal indicator light of life-span (V5), is connected in parallel on the two ends of described anchor switch (K2);
Another road display circuit is made of the current-limiting resistance that is one another in series (R8), diode (V4) and electric power output indicator (V3), is connected in parallel between leakage current detection protection circuit output live wire and the zero line;
When normal and reset button was in trip status when the leakage current detection protection circuit function, described anchor switch (K2) was in off-state, and normal indicator light of described life-span (V5) is luminous, and described electric power output indicator (V3) does not work; After reset button resets, described anchor switch (K2) closure, normal indicator light of described life-span (V5) extinguishes, and described electric power output indicator (V3) is bright.
4. according to claim 1 or 2 or 3 described leakage current detection protection circuits, it is characterized in that: this leakage current detection protection circuit also comprises two groups of point discharge sheet metals; Wherein
One group of point discharge sheet metal (M1, M2) is arranged on the power input zero line and passes the power input zero line place of described induction coil (L1), self-excitation coil (L2), and (M1, M2) is staggered relatively for two point discharge sheet metals;
The power input zero line place that another group point discharge sheet metal (M3, M4) is arranged on the power input live wire and passes described induction coil (L1), self-excitation coil (L2), (M3, M4) is staggered relatively for two point discharge sheet metals.
5. according to claim 1 or 2 or 3 described leakage current detection protection circuits, it is characterized in that: this leakage current detection protection circuit also comprises two groups of point discharge sheet metals; Wherein
One group of point discharge sheet metal (M1, M2) is arranged on the power input zero line and passes the power input live wire place of described induction coil (L1), self-excitation coil (L2), and (M1, M2) is staggered relatively for two point discharge sheet metals;
Another group point discharge sheet metal (M3, M4) is arranged on power input live wire and the zero line place of passing described induction coil (L1), self-excitation coil (L2), and (M3, M4) is staggered relatively for two point discharge sheet metals.
6. leakage current detection protection circuit, it comprise the induction coil L1 that is used to detect leakage current, the self-excitation coil (L2) that is used to detect the low resistance fault, control chip (IC1), the tripping coil (SOL) that is built-in with iron core, controllable silicon (V2), with the major loop switch (K1-1, K1-2) of reset button interlock; It is characterized in that:
This leakage current detection protection circuit also comprises the life-span stop detection switch (K4) and the anchor switch (K2) that are subjected to the control of electromagnetism latching device;
The anode of described controllable silicon (V2) through described anchor switch (K2), be built-in with iron core tripping coil (SOL) with pass the power input live wire of described induction coil (L1) and link to each other with self-excitation coil (L2); The negative electrode of described controllable silicon (V2) links to each other with power supply ground;
Described life-span stop detection switch (K4) and current-limiting resistance (R10, R11) series connection is configured for finishing the simulation leakage current generating circuit of life end checking function; End of this simulation leakage current generating circuit links to each other with the power input zero line, the other end through described tripping coil (SOL) with pass the power input live wire of described induction coil (L1) and link to each other with self-excitation coil (L2);
When reset button is in trip status, described life-span stop detection switch (K4) closure, anchor switch (K2) disconnects; After reset button resetted, described life-span stop detection switch (K4) disconnected, anchor switch (K2) closure; When reset button is pressed, described anchor switch (K2) closure, life-span stop detection switch (K4) changes disconnection into by closure.
7. leakage current detection protection circuit according to claim 6, it is characterized in that: this leakage current detection protection circuit also comprises a display circuit, this display circuit is by dichromatic LED (LED-G, LED-R), and diode (V4), (V5) and current-limiting resistance (R8, R9, R12) constitute;
An anode of described dichromatic LED (LED-G, LED-R) links to each other with an end of described anchor switch (K2) through diode (V4), resistance (R8); The common cathode end of described dichromatic LED links to each other with the other end of described anchor switch (K2) and the anode of described controllable silicon (V2); Another anode of described dichromatic LED links to each other with the negative electrode of described controllable silicon (V2) through diode (V5), resistance (R9);
After reset button resetted, described anchor switch (K2) closure had only a kind of light-emitting diode of color bright in the described dichromatic LED; After reset button was threaded off, described anchor switch (K2) disconnected, and the light-emitting diode of two kinds of colors in the dichromatic LED is all bright; When this leakage current detection protection circuit wiring was correct, the light-emitting diode of two kinds of colors in the dichromatic LED was all bright, otherwise when this leakage current detection protection circuit wiring error, the light-emitting diode of two kinds of colors in the dichromatic LED does not all work.
8. leakage current detection protection circuit according to claim 6 is characterized in that: this leakage current detection protection circuit comprises the two-way display circuit, wherein
No. one display circuit is made of the current-limiting resistance that is one another in series (R9), diode (V6), normal indicator light of life-span (V5), is connected in parallel on the two ends of described anchor switch (K2);
Another road display circuit is made of the current-limiting resistance that is one another in series (R8), diode (V4) and electric power output indicator (V3), is connected in parallel between leakage current detection protection circuit output live wire and the zero line;
When normal and reset button was in trip status when the leakage current detection protection circuit function, described anchor switch (K2) was in off-state, and normal indicator light of described life-span (V5) is luminous, and described electric power output indicator (V3) does not work; After reset button resets, described anchor switch (K2) closure, normal indicator light of described life-span (V5) extinguishes, and described electric power output indicator (V3) is bright.
9. according to claim 6 or 7 or 8 described leakage current detection protection circuits, it is characterized in that: this leakage current detection protection circuit also comprises two groups of point discharge sheet metals; Wherein
One group of point discharge sheet metal (M1, M2) is arranged on the power input zero line and passes the power input zero line place of described induction coil (L1), self-excitation coil (L2), and (M1, M2) is staggered relatively for two point discharge sheet metals;
The power input zero line place that another group point discharge sheet metal (M3, M4) is arranged on the power input live wire and passes described induction coil (L1), self-excitation coil (L2), (M3, M4) is staggered relatively for two point discharge sheet metals.
10. according to claim 6 or 7 or 8 described leakage current detection protection circuits, it is characterized in that: this leakage current detection protection circuit also comprises two groups of point discharge sheet metals; Wherein
One group of point discharge sheet metal (M1, M2) is arranged on the power input zero line and passes the power input live wire place of described induction coil (L1), self-excitation coil (L2), and (M1, M2) is staggered relatively for two point discharge sheet metals;
Another group point discharge sheet metal (M3, M4) is arranged on power input live wire and the zero line place of passing described induction coil (L1), self-excitation coil (L2), and (M3, M4) is staggered relatively for two point discharge sheet metals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202874322U CN201774227U (en) | 2010-02-12 | 2010-08-06 | Electric leakage detection protection circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020113055.0 | 2010-02-12 | ||
| CN201020113055 | 2010-02-12 | ||
| CN2010202874322U CN201774227U (en) | 2010-02-12 | 2010-08-06 | Electric leakage detection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774227U true CN201774227U (en) | 2011-03-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202874322U Expired - Lifetime CN201774227U (en) | 2010-02-12 | 2010-08-06 | Electric leakage detection protection circuit |
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| Country | Link |
|---|---|
| CN (1) | CN201774227U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157916A (en) * | 2010-02-12 | 2011-08-17 | 黄华道 | Electric leakage detection and protection circuit |
| CN102780206A (en) * | 2011-05-11 | 2012-11-14 | 黄华道 | Electric leakage detection protecting circuit |
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
| CN102832593A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electric leakage detection protection circuit with lightning impulse preventing/resisting function |
-
2010
- 2010-08-06 CN CN2010202874322U patent/CN201774227U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157916A (en) * | 2010-02-12 | 2011-08-17 | 黄华道 | Electric leakage detection and protection circuit |
| CN102780206A (en) * | 2011-05-11 | 2012-11-14 | 黄华道 | Electric leakage detection protecting circuit |
| CN102780206B (en) * | 2011-05-11 | 2015-01-14 | 黄华道 | Electric leakage detection protecting circuit |
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
| CN102832593A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electric leakage detection protection circuit with lightning impulse preventing/resisting function |
| CN102832591B (en) * | 2011-06-17 | 2016-09-07 | 黄华道 | There is the leakage current detection protection circuit of lightning impulse resistant function |
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Granted publication date: 20110323 |