CN201699393U - Electric leakage detection protection circuit with display function - Google Patents
Electric leakage detection protection circuit with display function Download PDFInfo
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- CN201699393U CN201699393U CN2010201668953U CN201020166895U CN201699393U CN 201699393 U CN201699393 U CN 201699393U CN 2010201668953 U CN2010201668953 U CN 2010201668953U CN 201020166895 U CN201020166895 U CN 201020166895U CN 201699393 U CN201699393 U CN 201699393U
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Abstract
The utility model discloses an electric leakage detection protection circuit with a display function, which is characterized by being further provided with two indicating lamps in different colors, namely a correct power-on indicating lamp LED2 and a working indicating lamp LED1. Changes of on-off and colors of the two indicating lamps are synchronous with the state changes of a reset button, when the reset button is in a tripping state, at least one indicating lamp is on, and when the reset button is in a reset state, the other indicating lamp is on, thereby reflecting the states of the electric leakage detection protection circuit. Accordingly, the electric leakage detection protection circuit is more concise.
Description
Technical field
The utility model relates to a kind of attaching plug or supply socket or interior leakage current detection protection circuit with Presentation Function of switch disconnector 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-span stop detection, Presentation Function.Before use, supply socket, attaching plug must be from detecting, and when its end-of-life, the reset button on supply socket, the attaching plug must can not reset all the time, supply socket, attaching plug do not have power supply output, and the state of supply socket or attaching plug is shown to the user.Working properly when supply socket, attaching plug, there is not end-of-life, its reset button resets, and when power supply output is arranged, also the state of supply socket or attaching plug will be shown to the user.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.
The utility model content
In view of the foregoing, the purpose of this utility model provides a kind of leakage current detection protection circuit with Presentation Function of simple in structure, low cost of manufacture.
For achieving the above object; the utility model is by the following technical solutions: a kind of leakage current detection protection circuit with Presentation Function; it comprise be installed in being used on the circuit board detect elements such as the induction coil of leakage current, the self-excitation coil that is used to detect the low resistance fault, control chip, controllable silicon, rectifier diode, resistance, be built-in with iron core tripping coil, with the major loop switch of reset button interlock, it is characterized in that:
This leakage current detection protection circuit also is provided with the indicator light of two different colours at least, and one is the indicator light that correctly powers on, and one is relay indicating light; Described two indicator lights bright or go out, the state variation of change in color and reset button is synchronous; When reset button is in trip status, have at least an indicator light bright; When reset button was in reset mode, the another indicator light was bright;
This leakage current detection protection circuit also is provided with the life-span stop detection switch with the reset button interlock; When reset button was in trip status and reset mode, described life-span stop detection switch disconnected; When reset button is pressed, described life-span stop detection switch closure, power input live wire or zero line pass described induction coil, self-excitation coil, tripping coil, control chip, life-span stop detection switch and link to each other with the power input zero line, current circuit is looked in formation, finishes end-of-life from detecting.
In the specific embodiment of utility model, the anode of the described indicator light that powers on links to each other with the power input zero line that passes induction coil and self-excitation coil through current-limiting resistance, and the negative electrode of the indicator light that powers on is through rectifier diode, tripping coil and pass induction coil and the power input live wire of self-excitation coil links to each other;
The anode of described relay indicating light links to each other with the zero line of power output end through current-limiting resistance, and the negative electrode of relay indicating light is through rectifier diode, tripping coil and pass induction coil and the power input live wire of self-excitation coil links to each other;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work; When reset button was in reset mode, described indicator light and the relay indicating light of powering on was all bright.
In another specific embodiment of utility model, the negative electrode of the described indicator light that powers on links to each other with the power input live wire that passes induction coil and self-excitation coil through current-limiting resistance, and the anode of the indicator light that powers on links to each other with the power input zero line that passes induction coil and self-excitation coil through rectifier diode;
The negative electrode of described relay indicating light links to each other with the live wire of power output end through current-limiting resistance, tripping coil, and the anode of relay indicating light links to each other with the power input zero line that passes induction coil and self-excitation coil through rectifier diode;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work; When reset button was in reset mode, described indicator light and the relay indicating light of powering on was all bright.
In another specific embodiment of utility model, the negative electrode of the described indicator light that powers on links to each other with the power input live wire that passes induction coil and self-excitation coil through current-limiting resistance, and the anode of the indicator light that powers on links to each other with the power input zero line that passes induction coil and self-excitation coil through rectifier diode;
The negative electrode of described relay indicating light links to each other with the live wire of power output end through current-limiting resistance, tripping coil, major loop switch, and the anode of relay indicating light links to each other with the power input zero line that passes induction coil and self-excitation coil through rectifier diode;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work; When reset button was in reset mode, described indicator light and the relay indicating light of powering on was all bright.
In another specific embodiment of utility model, this leakage current detection protection circuit also is provided with a display switch that powers on that links with reset button; When reset button is in trip status, the display switch closure that powers on, when reset button was in reset mode, the display switch that powers on disconnected;
The anode of the described indicator light that powers on is through current-limiting resistance, link to each other with the power input zero line that passes induction coil and self-excitation coil with the display switch that powers on of reset button interlock, and the negative electrode of the indicator light that powers on links to each other with the power input live wire that passes induction coil and self-excitation coil through rectifier diode;
The anode of described relay indicating light links to each other with the zero line of power output end through current-limiting resistance, and the negative electrode of relay indicating light links to each other with the power input live wire that passes induction coil and self-excitation coil through rectifier diode;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work; When reset button was in reset mode, the described indicator light that powers on did not work, and described relay indicating light is bright.
In another specific embodiment of utility model, this leakage current detection protection circuit also is provided with a display switch that powers on that links with reset button, and when reset button was in trip status, the display switch closure powered on, when reset button was in reset mode, the display switch that powers on disconnected;
The anode of the described indicator light that powers on is through current-limiting resistance, link to each other with the power input zero line that passes induction coil and self-excitation coil with the display switch that powers on of reset button interlock, and the negative electrode of the indicator light that powers on is through rectifier diode, tripping coil and pass induction coil and the power input live wire of self-excitation coil links to each other;
The anode of described relay indicating light links to each other with the zero line of power output end through current-limiting resistance, and the negative electrode of relay indicating light is through rectifier diode, tripping coil and pass induction coil and the power input live wire of self-excitation coil links to each other;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work; When reset button was in reset mode, the described indicator light that powers on did not work, and described relay indicating light is bright.
Described indicator light and the relay indicating light of powering on constitutes a common cathode dichromatic LED;
When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work, and sends a kind of light of color; When reset button was in reset mode, described indicator light and the relay indicating light of powering on was all bright, and the light of two kinds of colors mixes the light that sends the third color.
Described indicator light and the relay indicating light of powering on constitutes a common cathode dichromatic LED; When reset button was in trip status, the described indicator light that powers on was bright, and described relay indicating light does not work, and sends a kind of light of color; When reset button was in reset mode, the described indicator light that powers on did not work, and described relay indicating light is bright, sends the light of another color.
When described reset button is moved, have six switches and its interlock at least, reset button is when down state, and interlock has a switch closure at least; Described reset button has two switch off state at least at reset mode, has four switch closed condition at least.
Described life-span stop detection switch closure, reset button starts, and whole leakage current detection protection circuit provides power supply by power input; Described life-span stop detection switch disconnects, and described reset button resets, and whole leakage current detection protection circuit provides power supply by power output end and the power input that passes the self-excitation coil of induction coil, low resistance fault.
Advantage of the present utility model: circuit is succinct, low cost of manufacture.
Description of drawings
Fig. 1 is the utility model leakage current detection protection circuit embodiment 1 physical circuit figure;
Fig. 2 is the utility model leakage current detection protection circuit embodiment 2 physical circuit figure;
Fig. 3 is the utility model leakage current detection protection circuit embodiment 3 physical circuit figure;
Fig. 4 is the utility model leakage current detection protection circuit embodiment 4 physical circuit figure;
Fig. 5 is the utility model leakage current detection protection circuit embodiment 5 physical circuit figure;
Fig. 6 is the utility model leakage current detection protection circuit embodiment 6 physical circuit figure;
Fig. 7 is the utility model leakage current detection protection circuit embodiment 7 physical circuit figure.
Embodiment
As shown in Figure 1, the disclosed leakage current detection protection circuit of the utility model mainly comprise be installed in being used on the circuit board detect the induction coil L1 of leakage current, the self-excitation coil L2 that is used to detect the low resistance fault, control chip IC1 (model RV4145), controllable silicon V4, resistance R 1, rectifier diode V1, be built-in with iron core tripping coil SOL, with the life-span stop detection K switch R-4 of reset button interlock, with major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 of reset button interlock.
The live wire HOT of power input LINE, zero line WHITE 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 R-2-1, KR-2-2 with the reset button interlock.The live wire of power output end LOAD, zero line link to each other with zero line accessory power outlet electrode with the live wire accessory power outlet electrode of power supply output plughole through major loop K switch R-3-1, the KR-3-2 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 pin 1,2,3,7 of control chip IC1 with the detection signal output of the self-excitation coil L2 that is used to detect the low resistance fault, and the control signal output pin 5 of control chip IC1 extremely links to each other with the control of controllable silicon V4.
The anode of controllable silicon V4 through tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the negative electrode of controllable silicon V4 links to each other with the zero line WHITE of power input LINE through the life-span stop detection K switch R-4 with the reset button interlock.Simultaneously, the power supply input pin 6 of control chip IC1 is through resistance R 1, rectifier diode V1, tripping coil SOL and pass induction coil L1 and the power input live wire of self-excitation coil L2 links to each other, and the place of working input pin 4 of control chip IC1 links to each other with the zero line WHITE of power input LINE by the life-span stop detection K switch R-4 with the reset button interlock.
As shown in Figure 1; when the reset button on supply socket or attaching plug starts when being pressed; life-span stop detection K switch R-4 closure; the live wire of power input LINE passes the self-excitation coil L2 that is used to detect the induction coil L1 of leakage current and is used to detect the low resistance fault; link to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through tripping coil SOL; the place of working input pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 links to each other with the power input zero line by closed life-span stop detection K switch R-4; form the difference current circuit, detect whether end-of-life of this leakage protection circuit certainly.
If leakage protection circuit does not have end-of-life; induction coil L1 then; self-excitation coil L2 can sense " leak current fault; low resistance fault " that exists in the power supply circuits; induction coil L1 then; self-excitation coil L2 output induced signal is given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; electromagnetism latching device action in supply socket or the attaching plug; reset button successfully resets; life-span stop detection K switch R-4 disconnects; make earth leakage protective socket; or plug; or the power output end of switch has power supply output, promptly finishes the life tests of creepage protection function.If the leakage protection circuit end-of-life, then the electromagnetism latching device in supply socket or the attaching plug is failure to actuate, and stops reset button to reset, and makes the non-transformer output all the time of earth leakage protective socket or plug or Switching Power Supply output.Provide the earth leakage protective of performance safety more to the user.
The utility model is when reset button is pressed; by forming poor current circuit is that the live wire of power input LINE passes the self-excitation coil L2 that is used to detect the induction coil L1 of leakage current and is used to detect the low resistance fault; link to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through tripping coil SOL; the place of working input pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 links to each other with the power input zero line by closed life-span stop detection K switch R-4, finishes the whether function of end-of-life of automatic detection leakage protection circuit.Specifically; when the utility model is pressed at reset button RESET; the life-span stop detection K switch R-4 closure that disconnects; make the connection of leakage protection circuit working power form an analog circuit that is equivalent to leakage tests to magnetic test coil L1 and self-excitation coil L2; promptly flow into the electric current of the working power of leakage current detection protection circuit by L1, L2 center; no longer flow back to the input of power supply through behind the operating circuit, so on L1, L2, formed difference between current from L1, L2 center! The present invention has used the life status that this difference between current is checked leakage protection circuit just.Also utilized the simulation leakage current of the formed electric current of this operating current as test; the present invention has just saved simulation leakage tests circuit commonly used; reduced the element of circuit; simplified circuit; improved the reliability of circuit; and realized the whether purpose of end-of-life of automatic detection leakage protection circuit, and whether had leakage current fault, low resistance fault etc. in the power supply circuits.So circuit structure of the present invention is simple, volume is little, energy consumption is low, working stability, safety, reliable.
In order in time to react the operating state of leakage current detection protection circuit, as shown in Figure 1, the utility model also comprises the indicator light of two different colours at least, and one is the indicator light LED2 that powers on, and one is relay indicating light LED 1.Two indicator lights bright or go out, the state variation of change in color and reset button is synchronous; When reset button was in trip status, the indicator light LED2 that powers on was bright; When reset button was in reset mode, two indicator light LED2, LED1 were all bright.
As shown in Figure 1, power on indicator light LED2 anode through current-limiting resistance R4-2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the negative electrode of the indicator light LED2 that powers on through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.The anode of relay indicating light LED1 links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1, the negative electrode of relay indicating light LED1 through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 1; after the power firestreak in live wire, zero line and the wall of leakage current detection protection circuit power input LINE, zero line correctly connect; reset button is in trip status, and life-span stop detection K switch R-4, the major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 that link with reset button all are off-state.The zero line of power input LINE passes induction coil L1, self-excitation coil L2; link to each other through current-limiting resistance R4-2, the indicator light LED2 that powers on, rectifier diode V2, tripping coil SOL and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright; illustrate that this leakage current detection protection circuit power input wiring is correct, can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock.Whether leakage current detection protection circuit carries out life-span stop detection automatically.The moment of life-span stop detection K switch R-4 closure disconnects immediately.
If leakage current detection protection circuit does not have end-of-life; then sensing coil L1 and self-excitation coil L2 output detection signal are given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; make the inner magnetic field that produces of tripping coil SOL; be built in the iron core action in the tripping coil SOL, the iron core that is built in the tripping coil SOL makes the tripping mechanism in supply socket or the attaching plug move again, and reset button can be resetted.
Continue to push reset button, reset button resets, major loop K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure, and life-span stop detection K switch R-4 disconnects, and power output end LOAD has power supply output.Power output end LOAD zero line links to each other through current-limiting resistance R4-1, relay indicating light LED1, rectifier diode V2, tripping coil SOL and the power input LINE live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; relay indicating light LED1 is bright; at this moment; the relay indicating light LED1 and the indicator light LED2 that powers on are all bright, show that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button can not reset all the time, and power output end does not have power supply output all the time, and relay indicating light LED1 does not work all the time, and the indicator light LED2 that only powers on is bright.
As shown in Figure 1, in specific embodiment of the utility model 1, the utility model has adopted a common cathode dichromatic LED that contains two LEDs 2 and LED1.After reset button resetted, when the power output end of leakage current detection protection circuit had power supply output, the relay indicating light LED1 and the indicator light LED2 that powers on were all luminous, and dichromatic LED demonstrates mixed the third color.
The common port of dichromatic LED through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.A pin of dichromatic LED links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1; Another pin of dichromatic LED links to each other with the power input LINE zero line that passes induction coil L1 and self-excitation coil L2 through current-limiting resistance R4-2.
As shown in Figure 1, the utility model utilizes the negative half period of AC power to make indicator light LED1, LED2 in the display circuit bright or do not work, thereby the state of reaction leakage current detection protection circuit is so make the utility model leakage current detection protection circuit circuit more succinct.
Fig. 2 is the utility model embodiment 2 physical circuit figure.The operation principle of leakage current detection protection circuit shown in Figure 2 and leakage current detection protection circuit shown in Figure 1 is identical; promptly utilize the negative half period of power input AC power to make indicator light LED1, LED2 in the display circuit luminous; show the operating state of leakage current detection protection circuit, circuit is basic identical.
Leakage current detection protection circuit shown in Figure 2 also comprises the indicator light of two different colours at least, and one is the indicator light LED2 that powers on, and one is relay indicating light LED1.
Power on indicator light LED2 negative electrode through current-limiting resistance R4-2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the anode of the indicator light LED2 that powers on through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.The negative electrode of relay indicating light LED1 links to each other with the live wire of power output end LOAD through current-limiting resistance R4-1, tripping coil SOL, the anode of relay indicating light LED1 through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 2; after the power firestreak in live wire, zero line and the wall of leakage current detection protection circuit power input LINE, zero line correctly connect; reset button is in trip status, and life-span stop detection K switch R-4, the major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 that link with reset button all are off-state.The zero line of power input LINE passes induction coil L1, self-excitation coil L2 and links to each other through rectifier diode V2, the indicator light LED2 that powers on, current-limiting resistance R4-2 and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock, whether leakage current detection protection circuit carries out life-span stop detection automatically.The moment of life-span stop detection K switch R-4 closure disconnects immediately.
If leakage current detection protection circuit does not have end-of-life; then sensing coil L1 and self-excitation coil L2 output detection signal are given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; make the inner magnetic field that produces of tripping coil SOL; be built in the iron core action in the tripping coil SOL, the iron core that is built in the tripping coil SOL makes the tripping mechanism in supply socket or the attaching plug move again, and reset button can be resetted.
Continue to push reset button, reset button resets, major loop K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure, and life-span stop detection K switch R-4 disconnects, and power output end LOAD has power supply output.The power input zero line passes induction coil L1, self-excitation coil L2 through rectifier diode V2, relay indicating light LED1, current-limiting resistance R4-1, tripping coil SOL, link to each other with the power output end live wire; Simultaneously; the power input zero line passes induction coil L1, self-excitation coil L2 and links to each other with the power output end live wire through rectifier diode V2, the indicator light LED2 that powers on, current-limiting resistance R4-2, major loop K switch R-2-1; form the closed-loop path; power on indicator light LED2 and relay indicating light LED1 is all bright, shows that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button does not reset all the time, and power output end does not have power supply output all the time, and the indicator light LED2 that only powers on is bright.
In specific embodiment of the utility model 2, adopted a common anode dichromatic LED that contains two LEDs 2 and LED1.After reset button resetted, when the power output end of leakage current detection protection circuit had power supply output, the relay indicating light LED1 and the indicator light LED2 that powers on were all luminous, and dichromatic LED demonstrates mixed the third color.
The common port of dichromatic LED through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, a pin of dichromatic LED links to each other with the live wire of power output end LOAD through current-limiting resistance R4-1, tripping coil SOL.Another pin of dichromatic LED links to each other with the power input LINE live wire that passes induction coil L1 and self-excitation coil L2 through current-limiting resistance R4-2.
Fig. 3 is the utility model embodiment 3 physical circuit figure.The operation principle of leakage current detection protection circuit shown in Figure 3 and Fig. 1, leakage current detection protection circuit shown in Figure 2 is identical; promptly utilize the negative half period of power input AC power to make lumination of light emitting diode in the display circuit; the operating state that shows leakage current detection protection circuit, circuit are slightly different.
Leakage current detection protection circuit shown in Figure 3 also is provided with a display switch KR-6 that powers on that links with reset button.When reset button RESET is in trip status, the display switch KR-6 closure that powers on, when reset button RESET was in reset mode, the display switch KR-6 that powers on disconnected.
As shown in Figure 3, power on indicator light LED2 anode through current-limiting resistance R4-2, with reset button interlock power on display switch KR-6 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the negative electrode of the indicator light LED2 that powers on through rectifier diode V2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.The anode of relay indicating light LED1 links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1, the negative electrode of relay indicating light LED1 through rectifier diode V2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 3; after the power firestreak in live wire, zero line and the wall of leakage current detection protection circuit power input LINE, zero line correctly connect; the zero line of power input LINE passes induction coil L1, self-excitation coil L2 through linking to each other with reset button interlock, the closed display switch KR-6 that powers on, current-limiting resistance R4-2, the indicator light LED2 that powers on, rectifier diode V2 and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock, whether leakage current detection protection circuit carries out life-span stop detection automatically.
If leakage current detection protection circuit does not have end-of-life; then sensing coil L1 and self-excitation coil L2 output detection signal are given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; make the inner magnetic field that produces of tripping coil SOL; be built in the iron core action in the tripping coil SOL, the iron core that is built in the tripping coil SOL makes the tripping mechanism in supply socket or the attaching plug move again, and reset button can be resetted.
Continue to push reset button, reset button resets, major loop K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure, and power output end LOAD has power supply output.Disconnect with the display switch KR-6 that powers on of reset button interlock, the indicator light LED2 that powers on extinguishes.
The power output end zero line links to each other through current-limiting resistance R4-1, relay indicating light LED1, rectifier diode V2 and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; relay indicating light LED1 is bright, shows that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button can not reset all the time, and power output end does not have power supply output all the time, and the display switch KR-6 that powers on that links with reset button does not disconnect, and indicator light LED2 light yellow all the time powers on.
In specific embodiment of the utility model 3, adopted a common cathode dichromatic LED that contains two LEDs 2 and LED1.When reset button was in trip status, the indicator light LED2 that only powers on was bright, after reset button resets, when the power output end of leakage current detection protection circuit has power supply output, had only relay indicating light LED1 bright.
The common port of dichromatic LED through rectifier diode V2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2; A pin of dichromatic LED links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1; Another pin of dichromatic LED is through current-limiting resistance R4-2, link to each other with the power input LINE zero line that passes induction coil L1 and self-excitation coil L2 with the display switch KR-6 that powers on of reset button interlock.
Fig. 4 is the utility model embodiment 4 physical circuit figure, and promptly the utility model is applied to the specific embodiment in the attaching plug.The operation principle of leakage current detection protection circuit shown in Figure 4 and Fig. 1, leakage current detection protection circuit shown in Figure 2 is identical promptly utilizes the negative half period of power input AC power to make lumination of light emitting diode in the display circuit; show the operating state of leakage current detection protection circuit, circuit is basic identical.Leakage current detection protection circuit shown in Figure 4 also comprises the indicator light of two different colours at least, and one is the indicator light LED2 that powers on, and one is relay indicating light LED1.
Power on indicator light LED2 negative electrode through current-limiting resistance R4-2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the anode of the indicator light LED2 that powers on through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.The negative electrode of relay indicating light LED1 is through current-limiting resistance R4-1, tripping coil SOL, link to each other with the live wire of power input with the life-span stop detection K switch R-4 of reset button interlock, the anode of relay indicating light LED1 through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 4; after power firestreak, zero line in live wire, zero line and the wall of leakage current detection protection circuit power input LINE connect; reset button is in trip status, and the life-span stop detection K switch R-4, major loop K switch R-2-1, the KR-2-2 that link with reset button all are off-state.The zero line of power input LINE passes induction coil L1, self-excitation coil L2 and links to each other through rectifier diode V2, the indicator light LED2 that powers on, current-limiting resistance R4-2 and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock, whether leakage current detection protection circuit carries out life-span stop detection automatically.
If leakage current detection protection circuit does not have end-of-life; then sensing coil L1 and self-excitation coil L2 output detection signal are given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; make the inner magnetic field that produces of tripping coil SOL; be built in the iron core action in the tripping coil SOL, the iron core that is built in the tripping coil SOL makes the tripping mechanism in supply socket or the attaching plug move again, and reset button can be resetted.
Continue to push reset button, reset button resets, major loop K switch R-2-1, KR-2-2 closure, and life-span stop detection K switch R-4 disconnects, and power output end LOAD has power supply output.The power input zero line passes induction coil L1, self-excitation coil L2 and links to each other with the power output end live wire through rectifier diode V2, relay indicating light LED1, current-limiting resistance R4-1, tripping coil SOL; form the closed-loop path; relay indicating light LED1 is bright; the indicator light LED2 that powers on this moment is still luminous; two indicator light LED1, LED2 are all bright, show that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button does not reset all the time, and power output end does not have power supply output all the time, and the indicator light LED2 that only powers on is bright.
In specific embodiment of the utility model 4, adopted a common anode dichromatic LED that contains two LEDs 2 and LED1.When reset button was in trip status, the indicator light LED2 that only powers on was bright, and after reset button resetted, when the power output end of leakage current detection protection circuit had power supply output, power on indicator light LED2 and relay indicating light LED1 were all bright.
The common port of dichromatic LED through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, a pin of dichromatic LED links to each other with power input LINE live wire through current-limiting resistance R4-1, tripping coil SOL, life-span stop detection K switch R-4, simultaneously, this pin also directly links to each other with the live wire of power output end LOAD through current-limiting resistance R4-1, tripping coil SOL.Another pin of dichromatic LED links to each other with the power input LINE live wire that passes induction coil L1 and self-excitation coil L2 through current-limiting resistance R4-2.
Fig. 5 is the utility model embodiment 5 physical circuit figure, and promptly the utility model is applied to the specific embodiment in the attaching plug.The operation principle of leakage current detection protection circuit shown in Figure 5 and leakage current detection protection circuit shown in Figure 3 is identical utilizes the negative half period of power input AC power to make lumination of light emitting diode in the display circuit; the operating state that shows leakage current detection protection circuit, circuit are slightly different.
Leakage current detection protection circuit shown in Figure 5 also is provided with a display switch KR-6 that powers on that links with reset button.When reset button RESET is in trip status, the display switch KR-6 closure that powers on, when reset button RESET was in reset mode, the display switch KR-6 that powers on disconnected.
As shown in Figure 5, power on indicator light LED2 anode through current-limiting resistance R4-2, with reset button interlock power on display switch KR-6 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the negative electrode of the indicator light LED2 that powers on through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.The anode of relay indicating light LED1 links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1, the negative electrode of relay indicating light LED1 through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 5; after power firestreak, zero line in live wire, zero line and the wall of leakage current detection protection circuit power input LINE connect; reset button is in trip status; all be off-state with life-span stop detection K switch R-4, major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 of reset button interlock, display switch KR-6 closure powers on.The zero line of power input LINE passes induction coil L1, self-excitation coil L2, the display switch KR-6 that powers on, current-limiting resistance R4-2 through closure, the indicator light LED2 that powers on, rectifier diode V2, tripping coil SOL links to each other with the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock.Whether leakage current detection protection circuit carries out life-span stop detection automatically.
If leakage current detection protection circuit does not have end-of-life; then sensing coil L1 and self-excitation coil L2 output detection signal are given control chip IC1; the 5 pin output control signal of control chip IC1; make controllable silicon V4 conducting; make the inner magnetic field that produces of tripping coil SOL; be built in the iron core action in the tripping coil SOL, the iron core that is built in the tripping coil SOL makes the tripping mechanism in supply socket or the attaching plug move again, and reset button can be resetted.
Continue to push reset button, reset button resets, major loop K switch R-2-1, KR-2-2 closure, and the life-span stop detection K switch R-4 and the display switch KR-6 that powers on disconnect simultaneously, and the indicator light LED2 that powers on extinguishes, and power output end LOAD has power supply output.Power output end LOAD zero line links to each other through current-limiting resistance R4-1, relay indicating light LED1, rectifier diode V2, tripping coil SOL and the power input LINE live wire that passes induction coil L1, self-excitation coil L2, form the closed-loop path, have only relay indicating light LED1 bright.。
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button does not reset all the time, and power output end does not have power supply output all the time, and the indicator light LED2 that only powers on is bright.
In specific embodiment of the utility model 5, adopted a common cathode dichromatic LED that contains two LEDs 2 and LED1.When reset button was in trip status, the indicator light LED2 that only powers on was bright, after reset button resets, when the power output end of leakage current detection protection circuit has power supply output, had only relay indicating light LED1 bright.
The common port of dichromatic LED through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2; A pin of dichromatic LED links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1; Another pin of dichromatic LED is through current-limiting resistance R4-2, link to each other with the power input LINE zero line that passes induction coil L1 and self-excitation coil L2 with the display switch KR-6 that powers on of reset button interlock.
Fig. 6 is the utility model embodiment 6 physical circuit figure.The operation principle of leakage current detection protection circuit shown in leakage current detection protection circuit shown in Figure 6 and Fig. 1-5 is identical utilizes the negative half period of power input AC power to make lumination of light emitting diode in the display circuit; show the operating state of leakage current detection protection circuit, circuit is basic identical.
Leakage current detection protection circuit shown in Figure 6 also comprises the indicator light of two different colours at least, and one is the indicator light LED2 that powers on, and one is relay indicating light LED1.
Power on indicator light LED2 negative electrode through current-limiting resistance R4-2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the anode of the indicator light LED2 that powers on through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.The negative electrode of relay indicating light LED1 links to each other with the live wire of power output end LOAD jack through current-limiting resistance R4-1, tripping coil SOL, major loop K switch R-2-1 or KR-3-1, the anode of relay indicating light LED1 through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 6; after power firestreak, zero line in live wire, zero line and the wall of leakage current detection protection circuit power input LINE connect; reset button is in trip status; all be off-state with life-span stop detection K switch R-4, major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 of reset button interlock; the indicator light LED1 that only powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock, whether leakage current detection protection circuit carries out life-span stop detection automatically.
If leakage current detection protection circuit does not have end-of-life; continue to push reset button; reset button resets; major loop K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure; life-span stop detection K switch R-4 disconnects; power output end LOAD has power supply output, and the relay indicating light LED1 and the indicator light LED2 that powers on are all bright, shows that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button does not reset all the time, and power output end does not have power supply output all the time, and the indicator light LED2 that only powers on is bright.
In specific embodiment of the utility model 6, adopted a common anode dichromatic LED that contains two LEDs 2 and LED1.When reset button was in trip status, the indicator light LED2 that only powers on was bright, and after reset button resetted, when the power output end of leakage current detection protection circuit had power supply output, two indicator lights were all bright, and two blend of colors are sent the light of color in the 3rd.
The common port of dichromatic LED through rectifier diode V2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, a pin of dichromatic LED links to each other with the live wire of power output end LOAD through current-limiting resistance R4-1, tripping coil SOL, major loop K switch R-3-1 or KR-2-1.Another pin of dichromatic LED links to each other with the power input LINE live wire that passes induction coil L1 and self-excitation coil L2 through current-limiting resistance R4-2.
Fig. 7 is the utility model embodiment 7 physical circuit figure.The operation principle of leakage current detection protection circuit shown in leakage current detection protection circuit shown in Figure 7 and Fig. 1-6 is identical utilizes the negative half period of power input AC power to make lumination of light emitting diode in the display circuit; show the operating state of leakage current detection protection circuit, circuit is basic identical.
Leakage current detection protection circuit shown in Figure 7 is provided with a display switch KR-6 that powers on that links with reset button.When reset button RESET is in trip status, the display switch KR-6 closure that powers on, when reset button RESET was in reset mode, the display switch KR-6 that powers on disconnected.
As shown in Figure 7, power on indicator light LED2 anode through current-limiting resistance R4-2, with reset button interlock power on display switch KR-6 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the negative electrode of the indicator light LED2 that powers on through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.The anode of relay indicating light LED1 links to each other with the zero line of power output end LOAD or jack through current-limiting resistance R4-1, major loop K switch R-2-2, the negative electrode of relay indicating light LED1 through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2.
As shown in Figure 7; after power firestreak, zero line in live wire, zero line and the wall of leakage current detection protection circuit power input LINE connect; reset button is in trip status, and life-span stop detection K switch R-4, the major loop K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 that link with reset button all are off-state.The zero line of power input LINE passes induction coil L1, self-excitation coil L2, through linking to each other with the display switch KR-6 that powers on, current-limiting resistance R4-2, the indicator light LED2 that powers on, rectifier diode V2, the tripping coil SOL of the closure of reset button interlock and the power input live wire that passes induction coil L1, self-excitation coil L2; form the closed-loop path; the indicator light LED2 that powers on is bright, illustrates that this leakage current detection protection circuit can work.
Press reset button, with the life-span stop detection K switch R-4 closure of reset button interlock.Whether leakage current detection protection circuit carries out life-span stop detection automatically.
If leakage current detection protection circuit does not have end-of-life; continue to push reset button; reset button resets; major loop K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure; the life-span stop detection K switch R-4 and the display switch KR-6 that powers on disconnect simultaneously; the indicator light LED2 that powers on extinguishes, and power output end LOAD has power supply output.Power output end LOAD zero line links to each other through major loop K switch R-2-2, current-limiting resistance R4-1, relay indicating light LED1, rectifier diode V2, tripping coil SOL and the power input LINE live wire that passes induction coil L 1, self-excitation coil L2 again through the KR-3-2 switch; form the closed-loop path; relay indicating light LED1 is bright, shows that the power output end of leakage current detection protection circuit has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then reset button does not reset all the time, and power output end does not have power supply output all the time, and the indicator light LED2 that only powers on is bright.
In specific embodiment of the utility model 7, adopted a common cathode dichromatic LED that contains two LEDs 2 and LED1.When reset button was in trip status, the indicator light LED2 that only powers on was bright, after reset button resets, when the power output end of leakage current detection protection circuit has power supply output, had only relay indicating light LED1 bright.
The common port of dichromatic LED through rectifier diode V2, tripping coil SOL with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2; A pin of dichromatic LED links to each other with the zero line of power output end LOAD through current-limiting resistance R4-1, major loop K switch R-2-2; Another pin of dichromatic LED links to each other with the power input LINE zero line that passes induction coil L1 and self-excitation coil L2 through the display switch KR-6 that powers on the reset button interlock through current-limiting resistance R4-2.
In sum, the utility model utilizes the negative half period of AC power to make the indicator light of two different colours in the display circuit bright or do not work, thereby the state of reaction leakage current detection protection circuit is so make the utility model leakage current detection protection circuit circuit more succinct.
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 (12)
1. leakage current detection protection circuit with Presentation Function; it comprise be installed in being used on the circuit board detect the induction coil (L1) of leakage current, the self-excitation coil (L2) that is used to detect the low resistance fault, control chip (IC1), controllable silicon (V4), rectifier diode (V1), resistance (R1), be built-in with iron core tripping coil (SOL), with the major loop switch (KR-2-1, KR-2-2, KR-3-1, KR-3-2) of reset button interlock, it is characterized in that:
This leakage current detection protection circuit also is provided with the indicator light of two different colours at least, and one is the indicator light that correctly powers on (LED2), and one is relay indicating light (LED1); Described two indicator lights bright or go out, the state variation of change in color and reset button is synchronous; When reset button is in trip status, have at least an indicator light bright; When reset button was in reset mode, the another indicator light was bright;
This leakage current detection protection circuit also is provided with the life-span stop detection switch (KR-4) with the reset button interlock; When reset button was in trip status and reset mode, described life-span stop detection switch (KR-4) disconnected; When reset button is pressed, described life-span stop detection switch (KR-4) closure;
The power input live wire passes described induction coil (L1), self-excitation coil (L2), tripping coil (SOL), control chip (IC1), life-span stop detection switch (KR-4) and links to each other with the power input zero line, form the difference current circuit, finish end-of-life from detecting; Perhaps, the power input live wire links to each other through described tripping coil (SOL), control chip (IC1), life-span stop detection switch (KR-4) and the power input zero line that passes described induction coil (L1), self-excitation coil (L2), form the difference current circuit, finish end-of-life from detecting.
2. the leakage current detection protection circuit with Presentation Function according to claim 1, it is characterized in that: the anode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2) with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2), the negative electrode of the indicator light that powers on (LED2) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
The anode of described relay indicating light (LED1) links to each other with the zero line of power output end through current-limiting resistance (R4-1), and the negative electrode of relay indicating light (LED1) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, described indicator light that powers on (LED2) and relay indicating light (LED1) were all bright.
3. the leakage current detection protection circuit with Presentation Function according to claim 1, it is characterized in that: the negative electrode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2) with pass the power input live wire of induction coil (L1) and link to each other with self-excitation coil (L2), the anode of the indicator light that powers on (LED2) through rectifier diode (V2) with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2);
The negative electrode of described relay indicating light (LED1) links to each other with the live wire of power output end through current-limiting resistance (R4-1), tripping coil (SOL), the anode of relay indicating light (LED1) through rectifier diode (V2) with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2);
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, described indicator light that powers on (LED2) and relay indicating light (LED1) were all bright.
4. the leakage current detection protection circuit with Presentation Function according to claim 1, it is characterized in that: the negative electrode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2) with pass the power input live wire of induction coil (L1) and link to each other with self-excitation coil (L2), the anode of the indicator light that powers on (LED2) through rectifier diode (V2) with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2);
The negative electrode of described relay indicating light (LED1) links to each other with the live wire of power output end through current-limiting resistance (R4-1), tripping coil (SOL), major loop switch (KR-2-1 or KR-3-1), the anode of relay indicating light (LED1) through rectifier diode (V2) with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2);
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, described indicator light that powers on (LED2) and relay indicating light (LED1) were all bright.
5. the leakage current detection protection circuit with Presentation Function according to claim 1 is characterized in that: this leakage current detection protection circuit also is provided with a display switch that powers on (KR-6) that links with reset button; Reset button (RESET) is when being in trip status, and the display switch that powers on (KR-6) closure, reset button (RESET) are when being in reset mode, and the display switch that powers on (KR-6) disconnects;
The anode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2), with the display switch that powers on (KR-6) of reset button interlock with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2), the negative electrode of the indicator light that powers on (LED2) through rectifier diode (V2) with pass the power input live wire of induction coil (L1) and link to each other with self-excitation coil (L2);
The anode of described relay indicating light (LED1) links to each other with the zero line of power output end through current-limiting resistance (R4-1), the negative electrode of relay indicating light (LED1) through rectifier diode (V2) with pass the power input live wire of induction coil (L1) and link to each other with self-excitation coil (L2);
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, the described indicator light that powers on (LED2) did not work, and (LED1) is bright for described relay indicating light.
6. the leakage current detection protection circuit with Presentation Function according to claim 1, it is characterized in that: this leakage current detection protection circuit also is provided with a display switch that powers on (KR-6) that links with reset button, reset button (RESET) is when being in trip status, display switch (KR-6) closure powers on, reset button (RESET) is when being in reset mode, and the display switch that powers on (KR-6) disconnects;
The anode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2), with the display switch that powers on (KR-6) of reset button interlock with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2), the negative electrode of the indicator light that powers on (LED2) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
The anode of described relay indicating light (LED1) links to each other with the zero line of power output end through current-limiting resistance (R4-1), and the negative electrode of relay indicating light (LED1) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, the described indicator light that powers on (LED2) did not work, and (LED1) is bright for described relay indicating light.
7. the leakage current detection protection circuit with Presentation Function according to claim 1; it is characterized in that: this leakage current detection protection circuit also is provided with a display switch that powers on (KR-6) that links with reset button; reset button (RESET) is when being in trip status; display switch (KR-6) closure powers on; reset button (RESET) is when being in reset mode; the display switch (KR-6) that powers on disconnects
The anode of the described indicator light that powers on (LED2) through current-limiting resistance (R4-2), with the display switch that powers on (KR-6) of reset button interlock with pass the power input zero line of induction coil (L1) and link to each other with self-excitation coil (L2), the negative electrode of the indicator light that powers on (LED2) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
The anode of described relay indicating light (LED1) links to each other with the zero line of power output end through current-limiting resistance (R4-1), major loop switch (KR-2-2), and the negative electrode of relay indicating light (LED1) is through rectifier diode (V2), tripping coil (SOL) and pass the power input live wire of induction coil (L1) with self-excitation coil (L2) and link to each other;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work; When reset button was in reset mode, the described indicator light that powers on (LED2) did not work, and (LED1) is bright for described relay indicating light.
8. according to claim 3 or 4 described leakage current detection protection circuits with Presentation Function, it is characterized in that: described indicator light that powers on (LED2) and relay indicating light (LED1) constitute anode dichromatic LED altogether;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work, and sends a kind of light of color; When reset button was in reset mode, described indicator light that powers on (LED2) and relay indicating light (LED1) were all bright, and the light of two kinds of colors mixes the light that sends the third color.
9. the leakage current detection protection circuit with Presentation Function according to claim 2 is characterized in that: described indicator light that powers on (LED2) and relay indicating light (LED1) constitute a common cathode dichromatic LED;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work, and sends a kind of light of color; When reset button was in reset mode, described indicator light that powers on (LED2) and relay indicating light (LED1) were all bright, and the light of two kinds of colors mixes the light that sends the third color.
10. according to claim 5 or 6 or 7 described leakage current detection protection circuits with Presentation Function, it is characterized in that: described indicator light that powers on (LED2) and relay indicating light (LED1) constitute a common cathode dichromatic LED;
When reset button was in trip status, the described indicator light that powers on (LED2) was bright, and described relay indicating light (LED1) does not work, and sends a kind of light of color; When reset button was in reset mode, the described indicator light that powers on (LED2) did not work, and (LED1) is bright for described relay indicating light, sends the light of another color.
11. the leakage current detection protection circuit with Presentation Function according to claim 10, it is characterized in that: when described reset button is moved, this leakage current detection protection circuit has six switches (KR-2-1, KR-2-2, KR-3-1, KR-3-2, KR-4, KR-6) and its interlock at least, reset button is when down state, and interlock has a switch (KR-4) closure at least; Described reset button is when reset mode, and interlock has two switches (KR-4, KR-6) for off-state at least, and four (KR-2-1, KR-2-2, KR-3-1, KR-3-2) switches are arranged is closure state in interlock at least.
12. the leakage current detection protection circuit with Presentation Function according to claim 11 is characterized in that: described life-span stop detection switch (KR-4) closure, reset button starts, and whole leakage current detection protection circuit provides power supply by power input; Described life-span stop detection switch (KR-4) disconnects, and described reset button resets, and whole leakage current detection protection circuit provides power supply by power output end and the power input that passes the self-excitation coil (L2) of induction coil (L1), low resistance fault.
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| CN2010201668953U CN201699393U (en) | 2010-03-29 | 2010-04-22 | Electric leakage detection protection circuit with display function |
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| CN201020146450.9 | 2010-03-29 | ||
| CN2010201668953U CN201699393U (en) | 2010-03-29 | 2010-04-22 | Electric leakage detection protection circuit with display function |
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| CN201699393U true CN201699393U (en) | 2011-01-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611071A (en) * | 2011-01-25 | 2012-07-25 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102611071A (en) * | 2011-01-25 | 2012-07-25 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
| CN102611071B (en) * | 2011-01-25 | 2015-05-20 | 黄华道 | Electric leakage detecting protecting circuit with magnetic locking mechanism |
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