CN201887425U

CN201887425U - Electricity leakage detection display protection circuit

Info

Publication number: CN201887425U
Application number: CN2010202958188U
Authority: CN
Inventors: 黄华道
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-01-28
Filing date: 2010-08-16
Publication date: 2011-06-29
Anticipated expiration: 2020-08-16

Abstract

The utility model relates to an electric leakage detection display protection circuit, which is characterized by further comprising at least one test switch I for preventing reset and a test switch II for preventing reset which are linked with a power supply socket/power supply plug reset button; the test switch I for preventing reset is connected in series with a current limiting resistor to form an analog leakage current generation circuit; one end of the analog leakage current generation circuit is finally connected with the live wire or the zero line of the power input end, and the other end of the analog leakage current generation circuit is connected with the zero line or the live wire of the power supply input end penetrating through an induction coil and a self-excitation coil; and the test switch II for preventing reset and the test switch I for preventing reset are connected in series in a power supply circuit of a control chip, a release coil and a silicon controlled rectifier. When a reset button is pressed down, the test switch I for preventing reset and the test switch II for preventing reset are closed to generate analog leakage current; and after the reset button is reset, the test switch I for preventing reset and the test switch II for preventing reset are disconnected, and the analog leakage current disappears.

Description

Detection of electrical leakage shows protective circuit

Technical field

The utility model relates to a kind of attaching plug or interior circuit with detection of electrical leakage, defencive function of supply socket with creepage protection function that be installed in.

Background technology

Along with the continuous development of the supply socket with creepage protection function (be called for short GFCI), attaching plug industry, people are to the function of supply socket with creepage protection function, attaching plug, safety in utilization, reliability, useful life etc. requiring more and more higher.This makes that the insider constantly is devoted to study, improve the circuit with current leakage detection protection function that is installed in supply socket, the attaching plug, makes more succinct, the with better function strength of its circuit, longer service life.

Fig. 1 has the supply socket of creepage protection function, the leakage current detection protection circuit circuit diagram in the attaching plug for common being installed in.As shown in the figure, this leakage current detection protection circuit mainly comprises induction coil L1, the self-excitation coil L2 that is used to detect the low resistance fault, control chip IC1 (model RV4145), the tripping coil SOL that is built-in with iron core, the controllable silicon V4 etc. that are used to detect leakage current.When leak current fault appears in load, during the low resistance fault, the current imbalance in the supply line then, induction coil L1, self-excitation coil L2 induces this phenomenon, output signal to control chip IC1, the pin 5 output high level of control chip IC1, trigger controllable silicon V4 conducting, making in the tripping coil SOL has electric current to flow through, produce magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, thereby make the mechanical device action in supply socket/attaching plug, make the reset button RESET dropout/tripping operation in the supply socket, make with the electric power of reset button RESET interlock and be connected K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 disconnects, the power supply output of cut off the electricity supply socket or attaching plug.

For detect be installed in supply socket leakage current detection protection circuit end-of-life whether in the attaching plug; also design has one to produce simulation leakage current circuit automatically in leakage current detection protection circuit, and this produces simulation leakage current circuit automatically and comprises current-limiting resistance R5 and simulation leakage current generating K switch R-4.This simulation leakage current generating K switch R-4 and reset button RESET interlock.Press reset button RESET, simulation leakage current generating K switch R-4 closure, power input live wire HOT links to each other with the power input zero line WHITE that passes induction coil L1 and self-excitation coil L2 through tripping coil SOL, current-limiting resistance R5, closed simulation leakage current generating K switch R-4, produces the simulation leakage current.If leakage current detection protection circuit does not have end-of-life; because of having electric current to flow through in the tripping coil SOL; produce magnetic field in the tripping coil; be built in the iron core action in the tripping coil SOL; make mechanical device action in supply socket/attaching plug; reset button can reset, and supply socket/attaching plug has power supply output.Otherwise; if leakage current detection protection circuit end-of-life; then there is not electric current to flow through in the tripping coil SOL; do not produce magnetic field in the tripping coil; the iron core that is built in the tripping coil SOL is failure to actuate; the interior mechanical device of supply socket/attaching plug is failure to actuate, and reset button can't reset all the time, and supply socket/attaching plug does not have power supply output.

The shortcoming of this common leakage current detection protection circuit is: the volume of current-limiting resistance R5 that is used to produce the simulation leakage current is bigger, the cost height, and energy consumption is big.

For this reason, the inventor improves leakage current detection protection circuit.

The utility model content

In view of the foregoing, the purpose of this utility model provides a kind of novel circuit with detection of electrical leakage, demonstration, defencive function.This detection of electrical leakage shows that protective circuit greatly reduces the volume of the current-limiting resistance that is used to produce the simulation leakage current and energy consumption, cost is low; The high voltage of cut-out in a flash that resets, threads off, trips at supply socket/attaching plug avoids controllable silicon, tripping coil to be damaged from tripping coil and controllable silicon process, plays to prolong the good action that detection of electrical leakage shows the protective circuit life-span.

For achieving the above object, the utility model is by the following technical solutions: a kind of detection of electrical leakage shows protective circuit, and it comprises 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; It is characterized in that:

This detection of electrical leakage shows that protective circuit also comprises at least two switches that link with supply socket/attaching plug reset button, and one is to stop the Test Switchboard I that resets, and another is to stop the Test Switchboard II that resets;

The Test Switchboard I that described prevention resets connects with current-limiting resistance, constitute simulation leakage current generating circuit, one end of simulation leakage current generating circuit finally links to each other with the power input live wire that passes the described induction coil that is used to detect leakage current, be used to detect the self-excitation coil of low resistance fault, and the other end links to each other with the power input zero line through the Test Switchboard II that described prevention resets; Perhaps

One end of described simulation leakage current generating circuit finally links to each other with the power input zero line that passes the described induction coil that is used to detect leakage current, be used to detect the self-excitation coil of low resistance fault, and the other end links to each other with the power input live wire through the Test Switchboard II that described prevention resets;

The end of the Test Switchboard I that described prevention resets also finally links to each other with power firestreak or zero line by discharge resistance;

The Test Switchboard I that the Test Switchboard II that described prevention resets, prevention reset is connected in described control chip, tripping coil, the silicon controlled current supply circuit; When reset button was pressed, the Test Switchboard II closure that Test Switchboard I that described prevention resets and prevention reset produced the simulation leakage current; After reset button resetted, the Test Switchboard II that Test Switchboard I that described prevention resets and prevention reset disconnected, and the simulation leakage current disappears.

In the utility model embodiment, the end of the Test Switchboard II that described prevention resets links to each other with the power input live wire, and the other end links to each other with the silicon controlled anode with the working power input pin of described control chip through described tripping coil; Simultaneously, the working power input pin of described control chip also links to each other with the power output end live wire by described tripping coil with the silicon controlled anode;

When reset button was pressed, the Test Switchboard II closure that described prevention resets was described control chip, tripping coil, controllable silicon power supply by power input;

After reset button resetted, the Test Switchboard II that described prevention resets disconnected, and was described control chip, tripping coil, controllable silicon power supply by power output end.

In utility model was implemented, the end of the Test Switchboard II that described prevention resets linked to each other with the power input zero line, and the other end links to each other with the silicon controlled negative electrode with the place of working pin of described control chip; Simultaneously, the place of working pin of described control chip links to each other with the power output end zero line with the silicon controlled negative electrode;

After reset button resetted, the Test Switchboard II that described prevention resets disconnected, and was described control chip, tripping coil, controllable silicon power supply by power output end, constituted power path.

In utility model was implemented, this leakage current detection protection circuit also comprised a power switch that links with reset button;

The end of the Test Switchboard II that described prevention resets links to each other with the power input zero line, and the other end links to each other with the silicon controlled negative electrode with the place of working pin of described control chip; Simultaneously, the place of working pin of described control chip also links to each other with the power output end zero line by described power switch with the silicon controlled negative electrode;

When reset button is pressed, the Test Switchboard II closure that described prevention resets, described power switch disconnects, and is described control chip, tripping coil, controllable silicon power supply by power input;

After reset button resetted, the Test Switchboard II that described prevention resets disconnected, and described power switch closure is place of working pin, the controllable silicon power supply of described control chip by power output end through power switch, constitutes the tripping coil path simultaneously.

The end of the Test Switchboard II that described prevention resets links to each other with the power input live wire, and the other end links to each other with the silicon controlled anode with the power supply input pin of described control chip through described tripping coil; Simultaneously, the power supply input pin of described control chip also links to each other with the power output end live wire by described power switch with the silicon controlled anode;

When reset button is pressed, the Test Switchboard II closure that described prevention resets, described power switch disconnects, and is described control chip and controllable silicon power supply by power input, constitutes the tripping coil path simultaneously;

After reset button resetted, the Test Switchboard II that described prevention resets disconnected, and described power switch closure is described control chip and controllable silicon power supply by power output end, constitutes the tripping coil path simultaneously.

A kind of detection of electrical leakage shows protective circuit, and it comprises 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; It is characterized in that: this detection of electrical leakage shows that protective circuit also comprises at least two switches that link with supply socket/attaching plug reset button, and one is to stop the Test Switchboard I that resets, and another is to stop the Test Switchboard II that resets;

The Test Switchboard I that described prevention resets connects with current-limiting resistance, constitutes simulation leakage current generating circuit, and an end power input zero line of simulation leakage current generating circuit links to each other; The Test Switchboard II that the other end resets through described prevention links to each other with the power firestreak that passes the described induction coil that is used to detect leakage current, be used to detect the self-excitation coil of low resistance fault; Perhaps

The Test Switchboard I that described prevention resets connects with current-limiting resistance, constitutes simulation leakage current generating circuit, and an end power input live wire of simulation leakage current generating circuit links to each other; The Test Switchboard II that the other end resets through described prevention links to each other with the zero-power line that passes the described induction coil that is used to detect leakage current, be used to detect the self-excitation coil of low resistance fault;

When reset button was pressed, the Test Switchboard II closure that Test Switchboard I that described prevention resets and prevention reset produced the simulation leakage current; After reset button resetted, the Test Switchboard II that Test Switchboard I that described prevention resets and prevention reset disconnected, and the simulation leakage current disappears.

In specific embodiment of the utility model; this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the silicon controlled anode; the other end links to each other with the silicon controlled negative electrode; display lamp is bright during the work of detection of electrical leakage display circuit; the detection of electrical leakage display circuit is not worked or during end-of-life, display lamp does not work.

In another specific embodiment of the present utility model; this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the power input zero line or the live wire that pass described induction coil, self-excitation coil, and the other end links to each other with power output end live wire or zero line.

In a specific embodiment more of the present utility model; this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the power input zero line or the live wire that pass described induction coil, self-excitation coil, and the other end links to each other with power output end live wire or zero line jack.

Description of drawings

Fig. 1 is common leakage current detection protection circuit physical circuit figure;

Fig. 2 is applied to the embodiment 1 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 3 is applied to the embodiment 2 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 4 is applied to the embodiment 3 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 5 is applied to the embodiment 4 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 6 is applied to the embodiment 5 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 7 is applied to the embodiment 6 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 8 is applied to the embodiment 7 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Fig. 9 is applied to the embodiment 8 physical circuit figure in the supply socket for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Figure 10 is applied to the embodiment 1 physical circuit figure in the attaching plug for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Figure 11 is applied to the embodiment 2 physical circuit figure in the attaching plug for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Figure 12 is applied to the embodiment 3 physical circuit figure in the attaching plug for the disclosed detection of electrical leakage of the utility model shows protective circuit;

Figure 13 is applied to the embodiment 4 physical circuit figure in the attaching plug for the disclosed detection of electrical leakage of the utility model shows protective circuit.

Embodiment

As shown in Figure 2, the disclosed new pattern creepage of the utility model detects and shows that protective circuit includes two switches with reset button RESET interlock, and one is the Test Switchboard I KR-3 that stops to reset, another is the Test Switchboard II KR-4 that prevention resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power firestreak HOT that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, tripping coil SOL, the other end links to each other with power output end zero line WHITE through resistance R 6, R7 (current-limiting protection effect).Stop the end of the Test Switchboard II KR-4 that resets to link to each other with power input zero line WHITE, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and switch plate 72A closed simultaneously.Power input live wire HOT passes Test Switchboard I KR-3, the Test Switchboard II KR-4 that closed prevention resets that induction coil L1, self-excitation coil L2 reset through tripping coil SOL, current-limiting resistance R5, closed prevention and links to each other with power input zero line WHITE, produces and simulates leakage current; Simultaneously; power input live wire HOT passes induction coil L1, self-excitation coil L2 and also links to each other with power output end zero line WHITE through Test Switchboard I KR-3, resistance R 6, the R7 (current-limiting protection effect) that tripping coil SOL, current-limiting resistance R5, closed prevention reset, and discharges the big electric current in the circuit.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the switch plate 72A of the Test Switchboard II KR-4 that resets to be disconnected, the simulation leakage current disappears, reset button RESET resets, and with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure of reset button interlock, supply socket/attaching plug has power supply output; If leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, supply socket/attaching plug does not have power supply output, and the display lamp LED that is connected in this circuit is bright; When unclamping reset button, display lamp extinguishes at once, proves this circuit end-of-life.

As shown in Figure 2; in the moment that reset button RESET is pressed; stop the fixed contact of the Test Switchboard IIKR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and switch plate 72A closed conducting simultaneously; power input zero line WHITE links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through Test Switchboard II KR-4, the resistance R 6 that the prevention of closure resets, for leakage current detection protection circuit provides power path.After reset button RESET resets; stop the fixed contact of the Test Switchboard II KR-4 that resets, the fixed contact both who stops the Test Switchboard I KR-3 that resets and switch plate 72A to disconnect; the place of working pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 changes into power output end zero line WHITE through resistance R 7 and links to each other, and provides power supply by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 2, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with power output end zero line WHITE through resistance R 7, and the other end finally links to each other with the power input live wire through tripping coil SOL.When the reset button RESET success that resets, with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure of reset button interlock, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Leakage current detection protection circuit shown in Figure 2 has four groups of discharge paths.First group comprises two point discharging plate M1, M2; Wherein, a point discharging plate M1 is connected on the power output end place, another point discharging plate M2 is connected on the power input place, and the point discharge sheet metal M1 at power output end place and the point discharge sheet metal M2 that is connected the power input place meet at right angles triangle or isoceles triangle shape are staggered relatively.Second group of discharge path comprises two

point discharging plate

24C and 25C; Point discharging plate 24C links to each other with zero line with the power output end live wire respectively with 25C, and point

discharge sheet metal

24C, 25C are staggered relatively.The 3rd group of discharge path is by resistance R 5, the resistance R 6 that links to each other with switch plate 72A, R7 (current-limiting protection effect) discharge.The 4th group of discharge path is piezo-resistance MOV.The utility model prevents that impacting with high pressure and low pressure impact from all realizing discharge by above-mentioned four groups of paths; guarantee leakage protection circuit itself and the electric equipment safety that is connected with the leakage protection circuit output; avoid the infringement that electric equipment caused because of the high voltage that produced of thunderbolt, and avoid the immeasurable harm and the loss that produce because of fire.

Fig. 3 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 2 physical circuit figure.As shown in Figure 3, this leakage current detection protection circuit also includes two switches with reset button RESET interlock, and one is the Test Switchboard I KR-3 that stops to reset, another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, the other end links to each other with power output end live wire HOT through resistance R 6, R7 (current-limiting protection effect).Stop the end of the Test Switchboard II KR-4 that resets to link to each other with power input live wire HOT, the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

When reset button RESET is pressed, stops the fixed contact of the Test Switchboard I KR-3 that resets and stop the fixed contact of the Test Switchboard II KR-4 that resets all closed simultaneously with switch plate 72A.Test Switchboard IKR-3, current-limiting resistance R5 that the Test Switchboard II KR-4 that power input live wire HOT resets through the prevention of closure, closed prevention reset link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2, produce to simulate leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop the fixed contact of the Test Switchboard II KR-4 that resets all to disconnect with switch plate 72A, the simulation leakage current disappears, reset button RESET resets, and drives power supply conductivity K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, and supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in Figure 3; in the moment that reset button RESET is pressed; stop the Test Switchboard IIKR-4 closure that resets; power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through Test Switchboard II KR-4, resistance R 6, the tripping coil SOL that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop fixed contact and the switch plate 72A of the Test Switchboard II KR-4 that resets to disconnect; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 links to each other with power output end live wire HOT through resistance R 7, provides power supply by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 3, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with power output end live wire HOT, the other end with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.When the reset button RESET success that resets, drive power supply conductivity K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 4 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 3 physical circuit figure.As shown in the figure, this leakage current detection protection circuit also includes two switches with reset button RESET interlock, and one is the Test Switchboard I KR-3 that stops to reset, another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, the switch other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

Stop the end of the Test Switchboard II KR-4 that resets to link to each other with power input live wire HOT, the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and switch plate 72A all closed simultaneously.Test Switchboard IKR-3, current-limiting resistance R5 that the Test Switchboard II KR-4 that power input live wire HOT resets through the prevention of closure, closed prevention reset link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2, produce to simulate leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop the fixed contact of the Test Switchboard II KR-4 that resets all to disconnect with switch plate 72A, the simulation leakage current disappears, reset button RESET resets, and with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure of reset button interlock, supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in Figure 4; in the moment that reset button RESET is pressed; stop the fixed contact of the Test Switchboard IIKR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and switch plate 72A all closed simultaneously; power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through Test Switchboard II KR-4, resistance R 6, the tripping coil SOL that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop the fixed contact of the Test Switchboard II KR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and switch plate 72A to disconnect; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 links to each other with power output end live wire HOT through tripping coil SOL, resistance R 7, provides power supply by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 4, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with power supply output plughole live wire HOT through resistance R 7, and the other end links to each other with the power input zero line that passes induction coil L1, self-excitation coil L2.When the reset button RESET success that resets, with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure of reset button interlock, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 5 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 4 physical circuit figure.As shown in the figure, this leakage current detection protection circuit also includes two switches with reset button RESET interlock, and one is the Test Switchboard I KR-3 that stops to reset, another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power input live wire HOT that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, tripping coil SOL, the other end links to each other with power output end zero-power line output plughole through resistance R 6, R7 (current-limiting protection effect).Stop the end of the Test Switchboard II KR-4 that resets to link to each other with power input zero line WHITE, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and switch plate 72A all closed simultaneously.Power input live wire HOT passes Test Switchboard I KR-3, the Test Switchboard II KR-4 that closed prevention resets that induction coil L1, self-excitation coil L2 reset through tripping coil SOL, current-limiting resistance R5, closed prevention and links to each other with power input zero line WHITE, produces and simulates leakage current; Simultaneously; power input live wire HOT passes induction coil L1, self-excitation coil L2 and also links to each other with power output end zero-power line output plughole through Test Switchboard I KR-3, resistance R 6, the R7 (current-limiting protection effect) that tripping coil SOL, current-limiting resistance R5, closed prevention reset, and discharges the big electric current in the circuit.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the switch plate 72A of the Test Switchboard II KR-4 that resets to be disconnected simultaneously, the simulation leakage current disappears, reset button RESET resets, and with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure that reset button drives, supply socket/attaching plug has power supply output; If leakage current detection protection circuit end-of-life; then the mechanical device in supply socket/attaching plug is failure to actuate; the simulation leakage current does not disappear or disappears; reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output, and the display lamp that is connected in this circuit is bright; when unclamping reset button; display lamp extinguishes at once, proves this circuit end-of-life, should change product.

As shown in Figure 5; in the moment that reset button RESET is pressed; stop the fixed contact of the Test Switchboard IIKR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and switch plate 72A closed simultaneously; power input zero line WHITE links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through Test Switchboard II KR-4, the resistance R 6 that the prevention of closure resets, for leakage current detection protection circuit provides the backflow power supply.After reset button RESET resets; stop the Test Switchboard II KR-4 that resets to disconnect; the place of working pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 links to each other with power output end zero-power line output plughole through resistance R 7, provides the backflow power path by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 5, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with power output end zero line WHITE through resistance R 7, and the other end links to each other with the power input live wire that passes induction coil L1, self-excitation coil L2.When the reset button RESET success that resets, with mains switch KR-2-1, KR-2-2, KR-3-1, the KR-3-2 closure that reset button drives, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 6 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 5 physical circuit figure.As shown in the figure, this leakage current detection protection circuit includes three switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets, and the 3rd is power switch KR-2.

Stop the end of the Test Switchboard I KR-3 reset to link to each other with the power input live wire HOT that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, tripping coil SOL, the other end through resistance R 6 with link to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1.

Stop the end of the Test Switchboard II KR-4 that resets to link to each other with power input zero line WHITE, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

The end of power switch KR-2 links to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2, and the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and switch plate 72A all closed simultaneously, power switch KR-2 fixed contact and switch plate 72A disconnect.Power input live wire HOT passes Test Switchboard I KR-3, the Test Switchboard II KR-4 that closed prevention resets that induction coil L1, self-excitation coil L2 reset through tripping coil SOL, current-limiting resistance R5, closed prevention and links to each other with power input zero line WHITE, produces and simulates leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the Test Switchboard I KR-3 fixed contact that resets and stop the Test Switchboard II KR-4 fixed contact and the switch plate 72A that reset to be disconnected simultaneously, switch plate 72A changes and power switch KR-2 closure, the simulation leakage current disappears, reset button RESET resets, with the closed conduction of mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 that reset button drives, supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in Figure 6; in the moment that reset button RESET is pressed; stop the Test Switchboard IIKR-4 fixed contact and the switch plate 72A closure that reset; power input zero line WHITE links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through Test Switchboard II KR-4, the resistance R 6 that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop the Test Switchboard I KR-3 fixed contact that resets; the Test Switchboard II KR-4 fixed contact that another prevention resets all disconnects with switch plate 72A; switch plate 72A changes and power switch KR-2 closure; the place of working pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 finally links to each other with the power input zero line through resistance R 6, closed power switch KR-2, provides power supply by power switch KR-2 for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 6, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the power input live wire that passes induction coil L1, self-excitation coil L2, and conducting links to each other with the power input zero line switch plate 72A of the Test Switchboard II KR-4 that the other end resets by prevention with power switch KR-2 fixed contact.When the reset button RESET success that resets, drive mains switch KR-2-1, KR-2-2, KR-3-1, the closed conduction of KR-3-2 with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 7 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 6 physical circuit figure.As shown in the figure, this leakage current detection protection circuit includes three switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets, and the 3rd is power switch KR-2.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5, the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

The end of power switch KR-2 links to each other with the power input live wire HOT that passes induction coil L1, self-excitation coil L2, and the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through switch plate 72A resistance R 6, tripping coil SOL.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and switch plate 72A all closed simultaneously, power switch KR-2 fixed contact and switch plate 72A disconnect.The Test Switchboard II KR-4 that power input live wire HOT resets through the prevention of closure, stop the Test Switchboard I KR-3, the current-limiting resistance R5 that reset to link to each other, produce and simulate leakage current with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the switch plate 72A of the Test Switchboard IIKR-4 that resets to be disconnected simultaneously, switch plate 72A changes and power switch KR-2 closure, the simulation leakage current disappears, reset button RESET resets, with the closed conduction of mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 of reset button interlock, supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in Figure 7; in the moment that reset button RESET is pressed; the fixed contact and the shared switch plate 72A closure that stop the Test Switchboard IIKR-4 that resets; power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through Test Switchboard II KR-4, resistance R 6, the tripping coil SOL that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; the fixed contact that stops the Test Switchboard I KR-3 that resets; stop fixed contact and the shared switch plate 72A of the Test Switchboard II KR-4 that resets to disconnect; common switch sheet 72A changes and power switch KR-2 closure; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 finally links to each other with the power input live wire through tripping coil SOL, resistance R 6, closed power switch KR-2, provides power supply by power switch KR-2 for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 7, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the power input zero line that passes induction coil L1, self-excitation coil L2, and the other end finally links to each other with the power input live wire with power switch KR-2 closure by common switch sheet 72A.When the reset button RESET success that resets, drive mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 8 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 7 physical circuit figure.As shown in the figure, this leakage current detection protection circuit includes three switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets, and the 3rd is power switch KR-2.

An end that stops the Test Switchboard I KR-3 reset through current-limiting resistance R5, tripping coil SOL with pass induction coil L1, self-excitation coil L2 finally links to each other with power input live wire HOT, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

Stop the end of the Test Switchboard IIKR-4 that resets to link to each other with power input zero line WHITE, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

The end of power switch KR-2 links to each other with the zero line WHITE of power output end, and the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and shared switch plate 72A all closed simultaneously, power switch KR-2 disconnects.Power input live wire HOT passes Test Switchboard I KR-3, the Test Switchboard II KR-4 that closed prevention resets that two induction coil L1, L2 reset through tripping coil SOL, current-limiting resistance R5, closed prevention and links to each other with power input zero line WHITE, produces and simulates leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the shared switch plate 72A of the Test Switchboard IIKR-4 that resets to be disconnected simultaneously, common switch sheet 72A changes and power switch KR-2 closure, the simulation leakage current disappears, reset button RESET resets, with the closed conduction of mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 that reset button drives, supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in Figure 8; in the moment that reset button RESET is pressed; the fixed contact that stops the Test Switchboard IIKR-4 that resets; stop fixed contact and the shared switch plate 72A of the Test Switchboard I KR-3 that resets closed simultaneously; the Test Switchboard II KR-4 that power input zero line WHITE resets through the prevention of closure; resistance R 6 links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1; for leakage current detection protection circuit provides power supply; stop the Test Switchboard I KR-3 that resets to provide leakage current for circuit; after reset button RESET resets; the fixed contact that stops the Test Switchboard II KR-4 that resets; stop fixed contact and the shared switch plate 72A of the Test Switchboard I KR-3 that resets to disconnect; common switch sheet 72A changes and power switch KR-2 closure; the place of working pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 is through resistance R 6; closed power switch KR-2 links to each other with the power output end zero line, provides electric power loop by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 8, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the power input live wire that passes induction coil L1, self-excitation coil L2, and the other end links to each other with the power output end zero line with power switch KR-2 conducting by common switch sheet 72A.When the reset button RESET success that resets, drive mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Fig. 9 is that the disclosed new pattern creepage of the utility model detects protective circuit embodiment 8 physical circuit figure.As shown in the figure, this leakage current detection protection circuit includes three switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets, and the 3rd is power switch KR-2.

The end of power switch KR-2 links to each other with the live wire HOT of power output end, and the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and shared switch plate 72A all closed simultaneously, power switch KR-2 disconnects.Test Switchboard I KR-3, current-limiting resistance R5 that the Test Switchboard II KR-4 that power input live wire HOT resets through the prevention of closure, closed prevention reset link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2, produce to simulate leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the shared switch plate 72A of the Test Switchboard II KR-4 that resets to be disconnected, common switch sheet 72A changes and power switch KR-2 closure, the simulation leakage current disappears, reset button RESET resets, drive mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, supply socket/attaching plug has power supply output; If leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time, supply socket/attaching plug does not have power supply output, and the display lamp that is connected in this circuit is bright; When unclamping reset button, display lamp extinguishes at once, proves this circuit end-of-life, should change product.

As shown in Figure 9; in the moment that reset button RESET is pressed; fixed contact and the switch plate 72A closure of the Test Switchboard I KR-3 that the fixed contact of the Test Switchboard IIKR-4 that prevention resets, prevention reset; power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through Test Switchboard II KR-4, resistance R 6, the tripping coil SQL that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop the fixed contact of the Test Switchboard II KR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and shared switch plate 72A to disconnect; common switch sheet 72A changes and power switch KR-2 closure; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 links to each other with the power output end live wire through tripping coil SOL, resistance R 6, closed power switch KR-2, provides power supply by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in Figure 9, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the power input zero line that passes induction coil L1, self-excitation coil L2, and the other end links to each other with the power output end live wire with power switch KR-2 conducting by common switch sheet 72A.When the reset button RESET success that resets, drive mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2 closure with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Figure 10 is that the disclosed new pattern creepage detection of the utility model protective circuit is applied to the embodiment 1 physical circuit figure in the attaching plug.As shown in the figure, this leakage current detection protection circuit includes two switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 through current-limiting resistance R5; The other end links to each other with the power output end live wire through resistance R 6, simultaneously, stops the other end of the Test Switchboard I KR-3 that resets also to link to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through resistance R 6, tripping coil SOL.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and shared switch plate 72A all closed simultaneously.Test Switchboard I KR-3, current-limiting resistance R5 that the Test Switchboard II KR-4 that power input live wire HOT resets through the prevention of closure, closed prevention reset link to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2, produce to simulate leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop fixed contact and the shared switch plate 72A of the Test Switchboard II KR-4 that resets to be disconnected, the simulation leakage current disappears, reset button RESET resets, and drives mains switch K1, K2 closure with reset button, and supply socket/attaching plug has power supply output; If leakage current detection protection circuit end-of-life; then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear or disappears, and reset button RESET can't reset all the time; supply socket/attaching plug does not have power supply output; but the user presses reset button again under unwitting situation, and its display lamp can be light, can stop automatically to reset; after unclamping hand; display lamp extinguishes at once, proves this circuit end-of-life, needs to change this product.

As shown in figure 10; in the moment that reset button RESET is pressed; stop the Test Switchboard IIKR-4 closure that resets; power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through Test Switchboard II KR-4, resistance R 6, the tripping coil SQL that the prevention of closure resets, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop the fixed contact of the Test Switchboard II KR-4 that resets, the fixed contact that stops the Test Switchboard I KR-3 that resets and shared switch plate 72A to disconnect; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 links to each other with the power output end live wire through tripping coil SOL, provides power supply by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in figure 10, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the attaching plug input zero line that passes induction coil L1, self-excitation coil L2, and the other end links to each other with the power output end live wire.When the reset button RESET success that resets, drive mains switch K1, K2, closed conducting with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Figure 11 is that the disclosed new pattern creepage detection of the utility model protective circuit is applied to the embodiment 2 physical circuit figure in the attaching plug.As shown in the figure, this leakage current detection protection circuit includes two switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets.

An end that stops the Test Switchboard I KR-3 reset through current-limiting resistance R5, resistance R 4, light-emitting diode V3, diode V2, take off mouthful coil SOL and pass the power firestreak of induction coil L1 and link to each other with self-excitation coil L2, the other end links to each other through the place of working pin 4 of resistance R 6 with controllable silicon negative electrode and control chip IC1.

Stop the end of the Test Switchboard II KR-4 that resets to link to each other with the power input zero line, the other end links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through resistance R 6.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and shared switch plate 72A all closed simultaneously.Test Switchboard I KR-3, current-limiting resistance R5, resistance R 4, light-emitting diode V3, the diode V2 that the Test Switchboard II KR-4 that power input zero line WHITE resets through the prevention of closure, closed prevention reset, take off mouthful coil SOL and pass the power firestreak of induction coil L1 and link to each other, produce and simulate leakage current with self-excitation coil L2.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the fixed contact of the Test Switchboard I KR-3 that resets and stop the fixed contact of the Test Switchboard II KR-4 that resets and shared switch plate 72A to disconnect, the simulation leakage current disappears, reset button RESET resets, and with mains switch K1, the K2 closure of reset button interlock, supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in figure 11; in the moment that reset button RESET is pressed; stop the Test Switchboard IIKR-4 closure that resets; the power input Live line Zero line links to each other with the negative electrode of controllable silicon V4 and the place of working pin 4 of control chip IC1 through Test Switchboard II KR-4, the resistance R 6 that the prevention of closure resets, for leakage current detection protection circuit provides simulation leakage current power supply.After reset button RESET resets; stop the fixed contact of the Test Switchboard II KR-4 that resets, the contact that stops the Test Switchboard I KR-3 that resets and shared switch plate 72A to disconnect; the place of working pin 4 of the negative electrode of controllable silicon V4 and control chip IC1 links to each other with the power output end zero line; the place of working pin 4 of controllable silicon negative electrode and control chip IC1 finally links to each other with the output zero line, provides power path by power output end for whole leakage current detection protection circuit.

The utility model also is parallel with a circuit with Presentation Function between the live wire of leakage current detection protection circuit and zero line.As shown in figure 11, this display circuit comprises light-emitting diode V3, diode V2, the resistance R 4 that is one another in series.One end of display circuit links to each other with the power input live wire that passes induction coil L1, self-excitation coil L2 through tripping coil SOL, and the other end links to each other with the power output end zero line.When the reset button RESET success that resets, drive the closed conducting of mains switch K1, K2 with reset button, power output end has power supply output, has electric current to flow through in the display circuit, and light-emitting diode V3 is bright.

Figure 12 is that the disclosed new pattern creepage detection of the utility model protective circuit is applied to the embodiment 3 physical circuit figure in the attaching plug.As shown in the figure, this leakage current detection protection circuit includes two switches with reset button RESET interlock, and one is the Test Switchboard I KR-3 that stops to reset, another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 reset to link to each other with the power input zero line through current-limiting resistance R5, the Test Switchboard IIKR-4 that the other end resets through prevention with pass induction coil L1, self-excitation coil L2 power input live wire HOT links to each other.The end of tripping coil SOL directly inserts live wire with plug and links to each other, and the other end links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1.

When reset button RESET is pressed, stop the fixed contact of the fixed contact of the Test Switchboard I KR-3 that resets and the Test Switchboard II KR-4 that prevention resets and shared switch plate 72A all closed.The power input live wire HOT that passes induction coil L1 and self-excitation coil L2 links to each other with the power input zero line through Test Switchboard fixed contact KR-4, Test Switchboard I KR-3, the current-limiting resistance R5 that closed prevention resets that the prevention of closure resets, and produces and simulates leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the Test Switchboard IKR-3 that resets and stop the Test Switchboard II KR-4 and the shared switch plate 72A that reset to be disconnected, the simulation leakage current disappears, reset button RESET resets, and with mains switch K2, the K1 closure of reset button interlock, supply socket/attaching plug has power supply output; If leakage current detection protection circuit end-of-life; though the simulation leakage current does not disappear or disappears; so but earth leakage protective control chip IC1 is not because of existing power path cisco unity malfunction; also the electric current that does not just drive controllable silicon V4 can be exported; not conducting of controllable silicon V4; tripping coil SOL does not have to produce the electric current of the mechanical device action of excitation; so the mechanical device in supply socket/attaching plug is failure to actuate; reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in figure 12; in the moment that reset button RESET is pressed; stop the Test Switchboard IIKR-4 closure that resets, power input live wire HOT links to each other with the anode of controllable silicon V4 and the power supply input pin 6 of control chip IC1 through tripping coil SQL, for leakage current detection protection circuit provides power supply.After reset button RESET resets; stop the Test Switchboard II KR-4 that resets to disconnect; the power supply input pin 6 of the anode of controllable silicon V4 and control chip IC1 directly links to each other with the power input live wire through tripping coil SOL, provides power supply by power input for whole leakage current detection protection circuit.

As shown in figure 12, the utility model also is in series with a light-emitting diode V3 between the power supply input pin 6 of control chip IC1 and tripping coil, power firestreak.After leakage current detection protection circuit powered on, V3 was bright for this light-emitting diode, showed that this leakage current detection protection circuit powers on, can work.

Figure 13 is that the disclosed new pattern creepage detection of the utility model protective circuit is applied to the embodiment 4 physical circuit figure in the attaching plug.As shown in the figure, this leakage current detection protection circuit includes two switches that link with reset button RESET, and one is to stop the Test Switchboard I KR-3 that resets, and another is to stop the Test Switchboard II KR-4 that resets.

Stop the end of the Test Switchboard I KR-3 that resets to link to each other with the silicon controlled negative electrode with the place of working pin 4 of control chip IC1 through current-limiting resistance R5, the other end links to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 through the Test Switchboard II KR-4 that prevention resets, and power input live wire HOT links to each other through the work pin 6 of tripping coil with controllable silicon anode and control chip IC1.

When reset button RESET is pressed, stops the Test Switchboard I KR-3 that resets and stop the Test Switchboard II KR-4 and the shared switch plate 72A that reset all closed.Power input live wire HOT links to each other with the power input zero line WHITE that passes induction coil L1, self-excitation coil L2 with the Test Switchboard II KR-4 that place of working pin 4, artifical resistance R5, the closed prevention of control chip IC1 reset through the work pin 6 of tripping coil SQL, control chip IC1, produces the simulation leakage current.If leakage current detection protection circuit does not have end-of-life, in simulation leakage current generating moment, mechanical device action in supply socket/attaching plug, stop the Test Switchboard I KR-3 that resets and stop the Test Switchboard II KR-4 that resets to be disconnected, the simulation leakage current disappears, reset button RESET resets, and drives mains switch K1, K2 closure with reset button, and supply socket/attaching plug has power supply output; If the leakage current detection protection circuit end-of-life, then the mechanical device in supply socket/attaching plug is failure to actuate, and the simulation leakage current does not disappear, and reset button RESET can't reset all the time, and supply socket/attaching plug does not have power supply output.

As shown in figure 13, the utility model also is parallel with a light-emitting diode V3 between the anode of controllable silicon V4 and negative electrode.Correctly connecting with the mains, light-emitting diode V3 is luminous in the back.When controllable silicon V4 conducting moment, light-emitting diode V3 moment does not work, and this shows that this leakage current detection protection circuit is working properly, does not have end-of-life.

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: simulation leakage current generating time shorten; can reduce the heat energy consumption; the power capacity of use resistance just can be littler; the volume of resistance is also just littler, and cost is lower in production in enormous quantities, and is again energy-conservation.

Claims

1. a detection of electrical leakage shows protective circuit, and it comprises 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 (V4); It is characterized in that:

This detection of electrical leakage shows that protective circuit also comprises at least two switches that link with supply socket/attaching plug reset button, and one is to stop the Test Switchboard I (KR-3) that resets, and another is to stop the Test Switchboard II (KR-4) that resets;

The Test Switchboard I (KR-3) that described prevention resets connects with current-limiting resistance (R5), constitute simulation leakage current generating circuit, one end of simulation leakage current generating circuit finally links to each other with the power input live wire that passes the described induction coil (L1) that is used to detect leakage current, be used to detect the self-excitation coil (L2) of low resistance fault, and the other end links to each other with the power input zero line through the Test Switchboard II (KR-4) that described prevention resets; Perhaps

One end of described simulation leakage current generating circuit finally links to each other with the power input zero line that passes the described induction coil (L1) that is used to detect leakage current, be used to detect the self-excitation coil (L2) of low resistance fault, and the other end links to each other with the power input live wire through the Test Switchboard II (KR-4) that described prevention resets;

The end of the Test Switchboard I (KR-3) that described prevention resets also finally links to each other with power firestreak or zero line by discharge resistance (R6);

The Test Switchboard I (KR-3) that the Test Switchboard II (KR-4) that described prevention resets, prevention reset is connected in the current supply circuit of described control chip (IC1), tripping coil (SOL), controllable silicon (V4); When reset button was pressed, Test Switchboard II (KR-4) closure that Test Switchboard I (KR-3) that described prevention resets and prevention reset produced the simulation leakage current; After reset button resetted, the Test Switchboard II (KR-4) that Test Switchboard I (KR-3) that described prevention resets and prevention reset disconnected, and the simulation leakage current disappears.

2. detection of electrical leakage according to claim 1 shows protective circuit, it is characterized in that: the end of the Test Switchboard II (KR-4) that described prevention resets links to each other with the power input live wire, and the other end links to each other with the working power input pin of described control chip (IC1) and the anode of controllable silicon (V4) through described tripping coil (SOL); Simultaneously, the anode of the working power input pin of described control chip (IC1) and controllable silicon (V4) also links to each other with the power output end live wire by described tripping coil (SOL);

When reset button was pressed, Test Switchboard II (KR-4) closure that described prevention resets was described control chip (IC1), tripping coil (SOL), controllable silicon (V4) power supply by power input;

After reset button resetted, the Test Switchboard II (KR-4) that described prevention resets disconnected, and was described control chip (IC1), tripping coil (SOL), controllable silicon (V4) power supply by power output end.

3. detection of electrical leakage according to claim 1 shows protective circuit, it is characterized in that: the end of the Test Switchboard II (KR-4) that described prevention resets links to each other with the power input zero line, and the other end links to each other with the place of working pin of described control chip (IC1) and the negative electrode of controllable silicon (V4); Simultaneously, the negative electrode of the place of working pin of described control chip (IC1) and controllable silicon (V4) links to each other with the power output end zero line;

After reset button resetted, the Test Switchboard II (KR-4) that described prevention resets disconnected, and was described control chip (IC1), tripping coil (SOL), controllable silicon (V4) power supply by power output end, constituted power path.

4. detection of electrical leakage according to claim 1 shows protective circuit, it is characterized in that: this leakage current detection protection circuit also comprises a power switch (KR-2) that links with reset button;

The end of the Test Switchboard II (KR-4) that described prevention resets links to each other with the power input zero line, and the other end links to each other with the place of working pin (4) of described control chip (IC1) and the negative electrode of controllable silicon (V4); Simultaneously, the negative electrode of the place of working pin (4) of described control chip (IC1) and controllable silicon (V4) also links to each other with the power output end zero line by described power switch (KR-2);

When reset button is pressed, Test Switchboard II (KR-4) closure that described prevention resets, described power switch (KR-2) disconnects, and is described control chip (IC1), tripping coil (SOL), controllable silicon (V4) power supply by power input;

After reset button resets, the Test Switchboard II (KR-4) that described prevention resets disconnects, described power switch (KR-2) closure, is place of working pin (4), controllable silicon (V4) power supply of described control chip (IC1) by power output end through power switch (KR-2), constitutes the tripping coil path simultaneously.

5. detection of electrical leakage according to claim 1 shows protective circuit, it is characterized in that: this leakage current detection protection circuit also comprises a power switch (KR-2) that links with reset button;

The end of the Test Switchboard II (KR-4) that described prevention resets links to each other with the power input live wire, and the other end links to each other with the power supply input pin (6) of described control chip (IC1) and the anode of controllable silicon (V4) through described tripping coil (SOL); Simultaneously, the anode of the power supply input pin (6) of described control chip (IC1) and controllable silicon (V4) also links to each other with the power output end live wire by described power switch (KR-2);

When reset button is pressed, Test Switchboard II (KR-4) closure that described prevention resets, described power switch (KR-2) disconnects, and is described control chip (IC1) and controllable silicon (V4) power supply by power input, constitutes the tripping coil path simultaneously;

After reset button resetted, the Test Switchboard II (KR-4) that described prevention resets disconnected, and described power switch (KR-2) closure is described control chip (IC1) and controllable silicon (V4) power supply by power output end, constitutes the tripping coil path simultaneously.

6. detection of electrical leakage according to claim 1 shows protective circuit; it is characterized in that: this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the silicon controlled anode; the other end links to each other with the silicon controlled negative electrode; display lamp is bright during the work of detection of electrical leakage display circuit; the detection of electrical leakage display circuit is not worked or during end-of-life, display lamp does not work.

7. detection of electrical leakage according to claim 1 shows protective circuit; it is characterized in that: this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the power input zero line or the live wire that pass described induction coil, self-excitation coil, and the other end links to each other with power output end live wire or zero line.

8. detection of electrical leakage according to claim 1 shows protective circuit; it is characterized in that: this leakage current detection protection circuit also includes a display circuit; this display circuit one end links to each other with the power input zero line or the live wire that pass described induction coil, self-excitation coil, and the other end links to each other with power output end live wire or zero line jack.

9. a detection of electrical leakage shows protective circuit, and it comprises 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 (V4); It is characterized in that:

The Test Switchboard I (KR-3) that described prevention resets connects with current-limiting resistance (R5), constitutes simulation leakage current generating circuit, and an end power input zero line of simulation leakage current generating circuit links to each other; The Test Switchboard II (KR-4) that the other end resets through described prevention links to each other with the power firestreak that passes the described induction coil (L1) that is used to detect leakage current, be used to detect the self-excitation coil (L2) of low resistance fault; Perhaps

The Test Switchboard I (KR-3) that described prevention resets connects with current-limiting resistance (R5), constitutes simulation leakage current generating circuit, and an end power input live wire of simulation leakage current generating circuit links to each other; The Test Switchboard II (KR-4) that the other end resets through described prevention links to each other with the zero-power line that passes the described induction coil (L1) that is used to detect leakage current, be used to detect the self-excitation coil (L2) of low resistance fault;

When reset button was pressed, Test Switchboard II (KR-4) closure that Test Switchboard I (KR-3) that described prevention resets and prevention reset produced the simulation leakage current; After reset button resetted, the Test Switchboard II (KR-4) that Test Switchboard I (KR-3) that described prevention resets and prevention reset disconnected, and the simulation leakage current disappears.