CN102832593A - Electric leakage detection protection circuit with lightning impulse preventing/resisting function - Google Patents
Electric leakage detection protection circuit with lightning impulse preventing/resisting function Download PDFInfo
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- CN102832593A CN102832593A CN2011101648361A CN201110164836A CN102832593A CN 102832593 A CN102832593 A CN 102832593A CN 2011101648361 A CN2011101648361 A CN 2011101648361A CN 201110164836 A CN201110164836 A CN 201110164836A CN 102832593 A CN102832593 A CN 102832593A
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Abstract
The invention discloses an electric leakage detection protection circuit with a lightning impulse preventing/resisting function. The electric leakage detection protection circuit comprises an induction coil mounted on a circuit board and used for detecting leakage current, a self-exciting coil for detecting a low resistance fault, a control chip, controllable silicon, a rectifier diode, a resistor, a filter capacitor, a trip coil with a built-in iron core, and at least one pair of main circuit switches linked with a reset button. The electric leakage detection protection circuit is characterized by further comprising at least one group of discharge metal sheets, wherein tip ends or discharge arc surfaces of the first discharge metal sheet and the second discharge metal sheet are placed oppositely and spaced for a distance; the first discharge metal sheet is finally connected with a live wire at an input end of a power supply; and the second discharge metal sheet is finally connected with a neutral wire at the input end of the power supply.
Description
Technical field
The present invention relates to a kind of leakage current detection protection circuit anti-, the lightning impulse resistant function that has that is installed in attaching plug with creepage protection function or supply socket or the switch disconnector.
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 increasingly high 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..
In order to prevent bad weathers such as thunderstorm; The damage that thunder and lightning causes household electrical appliance; The inventor is devoted for years in the development earth leakage protective socket; Improve being installed in attaching plug with creepage protection function or the leakage current detection protection circuit in supply socket or the switch disconnector, arrange the position of discharge metal sheet again, make the leakage current detection protection circuit after the improvement really have the function of anti-/ lightning impulse resistant.Make supply socket (being called for short GFCI), attaching plug, mains switch that this leakage current detection protection circuit is installed have the function of lightning impulse resistant; Household electrical appliance to linking to each other with supply socket (being called for short GFCI), attaching plug, mains switch play long-term protective effect like electric water tank, air-conditioning, water heating device etc.
Summary of the invention
In view of the foregoing, main purpose of the present invention provides a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function.
For realizing above-mentioned purpose; The present invention adopts following technical scheme: a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function, it comprise be installed in being used on the circuit board detect 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, filter capacitor, be built-in with the tripping coil of iron core, with at least one pair of major loop switch of SR interlock, it is characterized in that:
This leakage current detection protection circuit comprises at least one group of discharge metal sheet; Most advanced and sophisticated or the discharge cambered surface of the first discharge metal sheet and the second discharge metal sheet is disposed opposite to each other, and one section space, interval; Wherein,
The first discharge metal sheet links to each other with the live wire output sleeve of power supply output plughole, and the second discharge metal sheet links to each other with the zero line output sleeve of power supply output plughole.
A kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function; It comprises be installed in being used on the circuit board detect 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, filter capacitor, be built-in with iron core tripping coil, with at least one pair of major loop switch of SR interlock, it is characterized in that:
This leakage current detection protection circuit comprises at least one group of discharge metal sheet; Most advanced and sophisticated or the discharge cambered surface of the first discharge metal sheet and the second discharge metal sheet is disposed opposite to each other, and one section space, interval;
The first discharge metal sheet links to each other with the power input live wire, and the second discharge metal sheet links to each other with the power input zero line.
In specific embodiment of the present invention, the said first discharge metal sheet links to each other with the power input live wire through said tripping coil; The said second discharge metal sheet links to each other with the power input zero line.
In another specific embodiment of the present invention, the said second discharge metal sheet links to each other with the power input zero line, and the said first discharge metal sheet links to each other with the power input live wire that passes induction coil and self-excitation coil through said tripping coil.
In another specific embodiment of the present invention, said first discharge metal sheet and power input live wire, the second discharge metal sheet links to each other with the power input zero line that passes induction coil and self-excitation coil.
In another specific embodiment of the present invention, said first discharge metal sheet and the power input live wire that passes induction coil and self-excitation coil, the second discharge metal sheet links to each other with the power input zero line.
Description of drawings
Fig. 1-1 is leakage current detection protection circuit embodiment 1 physical circuit figure of the present invention;
Fig. 1-2 is leakage current detection protection circuit embodiment 2 physical circuit figure of the present invention;
Fig. 2-1 is leakage current detection protection circuit embodiment 3 physical circuit figure of the present invention;
Fig. 2-2 is leakage current detection protection circuit embodiment 4 physical circuit figure of the present invention;
Fig. 3-1 is leakage current detection protection circuit embodiment 5 physical circuit figure of the present invention;
Fig. 3-2 is leakage current detection protection circuit embodiment 6 physical circuit figure of the present invention;
Fig. 4 is leakage current detection protection circuit embodiment 7 physical circuit figure of the present invention;
Fig. 5-1 is leakage current detection protection circuit embodiment 8 physical circuit figure of the present invention;
Fig. 5-2 is leakage current detection protection circuit embodiment 9 physical circuit figure of the present invention;
Fig. 6 is leakage current detection protection circuit embodiment 10 physical circuit figure of the present invention.
Embodiment
Shown in Fig. 1-1, the leakage current detection protection circuit with anti-/ lightning impulse resistant function disclosed by the invention mainly detects 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, rectifier diode V1, current-limiting resistance R1, filter capacitor C3, is built-in with the tripping coil SOL of iron core, at least one pair of major loop K switch R2-1 with the SR interlock, KR2-2, constitutes with the Test Switchboard KR-5 of testing button interlock by being installed in being used on the circuit board.
The live wire output sleeve of the self-excitation coil L2 warp that the live wire HOT of power input LINE passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault and the major loop K switch R2-1 of SR interlock and power supply output plughole and power output end live wire link to each other or break off, and power supply is provided.
The zero line output sleeve of the self-excitation coil L2 warp that the zero line WHITE of power input LINE passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault and the major loop K switch R2-2 of SR interlock and power supply output plughole and power output end zero line link to each other or break off, and power supply is provided.
The live wire output sleeve of power output end LOAD live wire and power supply output plughole becomes whole linking to each other; The zero line output sleeve of power output end LOAD zero line and power supply output plughole becomes whole linking to each other.
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 signal output part of the self-excitation coil L2 that is used to detect the low resistance fault; The control signal output pin 5 of control chip IC1 extremely links to each other with the control of controllable silicon V4, conducting and the shutoff of output triggering signal control controllable silicon V4.Whether simultaneously, the control utmost point of controllable silicon V4 also links to each other with the control signal output ends OUT of timer chip DSQ, regularly sends triggering signal, makes controllable silicon V4 conducting, can operate as normal thereby detect leakage current detection protection circuit.
Shown in Fig. 1-1, the present invention also comprises the simulation power switch KR-2 that at least one and SR link.When SR RESET was in trip status, this simulation power switch KR-2 was in off-state, and whole leakage current detection protection circuit is not charged, has not only practiced thrift electric energy, but also has prolonged the life-span of electrical equipment original paper.When SR RESET is pressed; KR-2 is closed for the simulation power switch; Be not merely leakage current detection protection circuit working power is provided; Whether can also automatically produce the simulation leakage current, detecting leakage current detection protection circuit automatically can operate as normal, promptly detects whether end-of-life of leakage current detection protection circuit automatically.After SR resetted, simulation power switch KR-2 switched to another state, and the simulation leakage current disappears; But simulation power switch KR-2 still is in closure state, for whole simulation leakage current detects protective circuit working power is provided.
Because the present invention simulates power switch KR-2 and has dual-use function, a switch has replaced simulation leakage current generating switch and two switches of power switch in the existing leakage current detection protection circuit, thereby; Make circuit more succinct; Volume reduces greatly, has reduced cost, has strengthened the market competitiveness.
Shown in Fig. 1-1, this simulation power switch KR-2 is a single-pole double-throw switch (SPDT), and its second quiet contact jaw B links to each other with power input LINE zero line WHITE; Its first quiet contact jaw A with pass the induction coil L1 that is used to detect leakage current zero-power line WHIE and link to each other with the self-excitation coil L2 that is used to detect the low resistance fault; Its moving contact lever C links to each other with the place of working input pin 4 of control chip IC1, the negative electrode of controllable silicon V4.
When SR RESET is in trip status; Simulation power switch KR-2 is in off-state; Components and parts such as the control chip IC1 in the leakage current detection protection circuit, controllable silicon V4, tripping coil SOL, resistance, electric capacity are all not charged; Whole leakage current detection protection circuit is not charged, is in electricity-saving state.This design makes the present invention more meet the designing requirement of energy-conserving and environment-protective; Power saving, and, because when leakage current detection protection circuit is not worked; Components and parts such as the control chip IC1 in the circuit, controllable silicon V4, tripping coil SOL, resistance, electric capacity are all not charged; So, make components and parts more anti-aging, thereby prolonged the useful life of components and parts and entire circuit.
When SR RESET is pressed; Simulation power switch KR-2 and SR RESET interlock; The first quiet contact jaw A of simulation power switch KR-2 contacts with moving contact lever C; Simulation power switch KR-2 is closed, and power input LINE 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, LED1, resistance R 5, diode V2, closed simulation power switch KR-2, for control chip IC1, controllable silicon V4, rectifier diode V1, resistance R 1, filter capacitor C3, the tripping coil SOL that is built-in with iron core provide the working power path; Form the closed-loop path, produce the simulation leakage current.
If leakage current detection protection circuit does not have end-of-life, still has creepage protection function, because of producing the simulation leakage current in the power supply circuits; Then induction coil L1, self-excitation coil L2 output induced signal are given control chip IC1, and the 5 pin output control signal of control chip IC1 makes controllable silicon V4 conducting; There is electric current to flow through in the tripping coil, produces magnetic field in the tripping coil, be arranged on the iron core action in the tripping coil; Snap close in the earth leakage protective socket is opened, waited for that SR resets.
Unclamp SR, SR RESET resets, major loop K switch R2-1, KR2-2 closure, and leakage current detection protection circuit power output end LOAD and power supply output plughole have power supply output.Simultaneously; The moving contact lever C and the first quiet contact jaw A of simulation power switch KR-2 break off, and the simulation leakage current disappears, and moving contact lever C contacts with the second quiet contact jaw B; Simulation power switch KR-2 switches to another state, and simulation power switch KR-2 still is in closure state.Power input LINE live wire HOT links to each other with power input zero line WHITE through tripping coil SOL, controllable silicon V4, closed simulation power switch KR-2; For control chip IC1, controllable silicon V4, rectifier diode V1, resistance R 1, filter capacitor C3, the tripping coil SOL that is built-in with iron core provide working power, the charged work of leakage current detection protection circuit.
In order to prevent the damage of thunder and lightning to leakage current detection protection circuit; And the damage of the household electrical appliance that link to each other with this leakage current detection protection circuit; Shown in Fig. 1-1, Fig. 2-1, Fig. 3-1, Fig. 4-1, Fig. 5-1, Fig. 6-1, the present invention also comprises at least one group of discharge metal sheet M1, M2.Most advanced and sophisticated or the discharge cambered surface of discharge metal sheet M1, M2 is disposed opposite to each other, and the one section space 0.7mm-1.5mm in interval.Wherein a slice discharge metal sheet M1 links to each other with the live wire output sleeve of power supply output plughole, and another sheet discharge metal sheet M2 links to each other with the zero line output sleeve of power supply output plughole.
Discharge metal sheet M1, M2 are the pair of electrodes of utilizing the design of point discharge effect, and it is mounted respectively on the live wire and zero line that is connected power input or power output end, and must be installed in the circuit that needs protection.When lightning induction instantaneous to live wire, zero line, can between live wire, zero line, produce low then thousands of volt, high then tens thousand of volts voltage, this instantaneous high voltage pulse is to the very big destruction of load meeting generation of electronic circuit.Therefore, this leakage current detection protection circuit can damage, the household electrical appliance that correspondingly link to each other with the earth leakage protective socket that this leakage current detection protection circuit the is installed damage that also can be hit.Therefore, above-mentioned discharge metal sheet M1, M2 just are equivalent to be contained in the lightning arrester in the earth leakage protective socket.
In order to prevent the damage of thunder and lightning to leakage current detection protection circuit, in the specific embodiment of the invention, the said at least one group of discharge metal sheet that comprises can also be placed on power input.Like discharge metal sheet M3, the M4 among Fig. 1-2.Most advanced and sophisticated or the discharge cambered surface of discharge metal sheet M3, M4 is disposed opposite to each other, and the one section space 0.7mm-1.5mm in interval.Wherein a slice discharge metal sheet M3 links to each other with the power input zero line, and discharge metal sheet M4 links to each other with the power input live wire through tripping coil SOL.Perhaps, shown in Fig. 5-2, discharge metal sheet M3 links to each other with the power input zero line, discharge metal sheet M4 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.Perhaps, like Fig. 1-1, Fig. 2-1, Fig. 3-1, shown in Fig. 5-1, wherein, a slice discharge sheet sheet metal M9 links to each other with power input live wire or zero line, another sheet discharge metal sheet M10 with pass zero-power line or the live wire of induction coil L1 and link to each other with self-excitation coil L2.
In order to prevent the damage of thunder and lightning to leakage current detection protection circuit; In another group specific embodiment of the present invention; The said at least one group of discharge metal sheet that comprises can also be placed on other position, and KR-2 links to each other with power input live wire or zero line through the simulation power switch.Like discharge metal sheet M5, the M6 among Fig. 1-1.Most advanced and sophisticated or the discharge cambered surface of discharge metal sheet M5, M6 is disposed opposite to each other, and the one section space 0.7mm-1.5mm in interval.Wherein a slice discharge metal sheet M5 links to each other with the power input live wire, and another sheet discharge metal sheet M6 links to each other with the power input zero line through the closure of simulation power switch KR-2.Shown in Fig. 1-1; Discharge metal sheet M6 links to each other with the moving contact lever C of simulation power switch KR-2; The first quiet contact jaw A of simulation power switch KR-2 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2, the second quiet contact jaw B that simulates power switch KR-2 links to each other with the power input zero line.
The connected mode of discharge metal sheet M7 among Fig. 2-1, the connected mode of M8 and the discharge metal sheet M5 among Fig. 1-1, M6 is basic identical.Its difference is: the discharge metal sheet M7 among Fig. 2-1 links to each other with the power input zero line, and discharge metal sheet M8 links to each other with the power input live wire through the closure of simulation power switch KR-2.Specifically; Discharge metal sheet M8 links to each other with the moving contact lever C of simulation power switch KR-2; The first quiet contact jaw A of simulation power switch KR-2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the second quiet contact jaw B that simulates power switch KR-2 links to each other with the power input live wire.
The connected mode of discharge metal sheet M3 among Fig. 2-2, the connected mode of M4 and the discharge metal sheet M7 among Fig. 2-1, M8 is basic identical.Its difference is: the discharge metal sheet M3 among Fig. 2-2 links to each other with the power input zero line, and discharge metal sheet M4 links to each other with the power input live wire through the closure of tripping coil SOL, simulation power switch KR-2.Specifically; Discharge metal sheet M4 links to each other with the moving contact lever C of simulation power switch KR-2 through tripping coil SOL; The first quiet contact jaw A of simulation power switch KR-2 with pass the power input live wire of induction coil L1 and link to each other with self-excitation coil L2, the second quiet contact jaw B that simulates power switch KR-2 links to each other with the power input live wire.
In order to prevent the damage of thunder and lightning to leakage current detection protection circuit; In another group of specific embodiment of the present invention; The said at least one group of discharge metal sheet that comprises can also be placed on other position; One of them discharge metal sheet links to each other with power input live wire or zero line, another discharge metal sheet through simulation power switch KR-2 not only with the power input zero line or live wire links to each other but also link to each other with power output end zero line or live wire.
Like discharge metal sheet M7, the M8 among Fig. 3-1, Fig. 4-1.Most advanced and sophisticated or the discharge cambered surface of discharge metal sheet M7, M8 is disposed opposite to each other, and the one section space 0.7mm-1.5mm in interval.Wherein a slice discharge metal sheet M7 links to each other with the power input zero line, and discharge metal sheet M8 not only links to each other with the power input live wire but also link to each other with the power output end live wire through simulation power switch KR-2.Shown in Fig. 3-1, Fig. 4-1; Discharge metal sheet M8 links to each other with the moving contact lever C of simulation power switch KR-2; The first quiet contact jaw A of simulation power switch KR-2 links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch KR-2 links to each other with the power output end live wire.
When SR RESET was in trip status, simulation power switch KR-2 was in off-state.When SR RESET was pressed, the moving contact lever C of simulation power switch KR-2 contacted with the first quiet contact jaw A, and KR-2 is closed for the simulation power switch, and discharge metal sheet M8 links to each other with the power input live wire through the simulation power switch KR-2 of closure; After SR RESET resetted, the moving contact lever C of simulation power switch KR-2 contacted with the second quiet contact jaw B, and KR-2 is closed for the simulation power switch, and discharge metal sheet M8 links to each other with the power output end live wire through the simulation power switch KR-2 of closure.If be struck by lightning this moment, discharge metal sheet M7, M8 are in discharge, and two discharge metal sheets are breakdown when the voltage between two discharge metal sheets surpasses set point, produce leakage current, make the leakage current detection protection circuit action, SR RESET tripping operation.
In specific embodiment shown in Fig. 3-2, the connected mode of the connected mode of discharge metal sheet M3, M4 and the discharge metal sheet M7 among Fig. 3-1, M8 is basic identical.Its difference is: the discharge metal sheet M3 among Fig. 3-2 links to each other with the power input zero line, and discharge metal sheet M4 not only links to each other with the power input live wire but also link to each other with the power output end live wire through tripping coil SOL, simulation power switch KR-2.Specifically; Discharge metal sheet M4 links to each other with the moving contact lever C of simulation power switch KR-2 through tripping coil SOL; The first quiet contact jaw A of simulation power switch KR-2 links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch KR-2 links to each other with the power output end live wire.
In specific embodiment shown in Fig. 5-1, Fig. 6-1, the connected mode of the connected mode of discharge metal sheet M5, M6 and the discharge metal sheet M7 among Fig. 3-1, M8 is basic identical.Its difference is: Fig. 5-1 links to each other with the power input live wire with discharge metal sheet M5 among Fig. 6-1, and discharge metal sheet M6 not only links to each other with the power input zero line but also link to each other with the power output end zero line through simulation power switch KR-2.Shown in Fig. 5-1, Fig. 6-1; Discharge metal sheet M6 links to each other with the moving contact lever C of simulation power switch KR-2; The first quiet contact jaw A of simulation power switch KR-2 links to each other with the power input zero line, and the second quiet contact jaw B of simulation power switch KR-2 links to each other with the power output end zero line.
When SR RESET was in trip status, simulation power switch KR-2 was in off-state.When SR RESET was pressed, the moving contact lever C of simulation power switch KR-2 contacted with the first quiet contact jaw A, and KR-2 is closed for the simulation power switch, and discharge metal sheet M6 links to each other with the power input zero line through the simulation power switch KR-2 of closure; After SR RESET resetted, the moving contact lever C of simulation power switch KR-2 contacted with the second quiet contact jaw B, and KR-2 is closed for the simulation power switch, and discharge metal sheet M8 links to each other with the power output end zero line through the simulation power switch KR-2 of closure.If be struck by lightning this moment, discharge metal sheet M5, M6 are in discharge, and two discharge metal sheets are breakdown when the voltage between two discharge metal sheets surpasses set point, produce leakage current, make the leakage current detection protection circuit action, SR RESET tripping operation.
In order in time to react the operating state of leakage current detection protection circuit, shown in Fig. 1-2, Fig. 2-2, the present invention also comprises display circuit.This display circuit is made up of power supply output indicator LED2, diode V6 and current-limiting resistance R6.After power supply output indicator LED2, diode V6 and the current-limiting resistance R6 series connection, an end links to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When the leakage current detection protection circuit power output end had power supply output, LED2 was bright for the power supply output indicator, otherwise, do not work.
In addition, this display circuit also has the wiring error Presentation Function.When installment work links to each other the power line in the wall by error with leakage current detection protection circuit power output end LOAD; Because SR RESET is in trip status; LED2 is bright for this power supply output indicator, stops automatically to reset, and shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even SR RESET is in trip status, this power supply output indicator LED2 did not work yet.
Leakage current detection protection circuit comprises a wiring error display circuit shown in Fig. 5-1, Fig. 5-2.This wiring error display circuit is made up of normally closed switch KR-3, indicator light LED2, diode V6 and the current-limiting resistance R6 with the SR interlock.After normally closed switch KR-3, indicator light LED2, diode V6 and the current-limiting resistance R6 of SR interlock connected, an end linked to each other with the power output end live wire, and the other end links to each other with the power output end zero line.When SR RESET is in trip status, K switch R-3 closure, when SR RESET was in reset mode, K switch R-3 broke off.
When installment work links to each other the power line in the wall by error with leakage current detection protection circuit power output end LOAD; Because SR RESET is in trip status, so K switch R-3 is in closure state; Indicator light LED2 is bright, shows this leakage current detection protection circuit wiring error.Otherwise when installer's wiring was correct, even SR RESET is in trip status, K switch R-3 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED2 does not work.
Shown in Fig. 1-1, the present invention also comprises an analog operation indicator light circuit.This analog operation indicator light circuit is made up of indicator light LED1, diode V2 and artifical resistance R5.After indicator light LED1, diode V2 and the artifical resistance R5 series connection, an end links to each other with power firestreak through tripping coil SOL, and the other end links to each other with zero-power line through simulation power switch KR-2.
Analog operation indicator light circuit of the present invention has dual-use function: 1, when SR is pressed; If leakage current detection protection circuit does not have end-of-life; This analog operation indicator light circuit produces the simulation leakage current; Indicator light LED1 is once glittering, if the leakage current detection protection circuit end-of-life then stops SR to reset; Whether 2, simultaneously, this analog operation indicator light circuit has indication, Presentation Function again, shows whether end-of-life of leakage current detection protection circuit, can operate as normal; So analog operation indicator light circuit of the present invention unites two into one two kinds of functions, circuit is more succinct.
Advantage of the present invention is: the diverse location in leakage current detection protection circuit is provided with at least one pair of discharge metal sheet, can resist lightning impulse effectively, and leakage current detection protection circuit is played a protective role with the household electrical appliance that link to each other with this leakage current detection protection circuit.
The above is specific embodiment of the present invention and the know-why used, and is any based on the equivalent transformation on the technical scheme of the present invention basis, all belongs within the protection range of the present invention.
Claims (6)
1. leakage current detection protection circuit with anti-/ lightning impulse resistant 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), filter capacitor (C3), be built-in with the tripping coil (SOL) of iron core, with at least one pair of major loop switch (KR2-1, KR2-2) of SR interlock, it is characterized in that:
This leakage current detection protection circuit comprises at least one group of discharge metal sheet; Most advanced and sophisticated or the discharge cambered surface of the first discharge metal sheet and the second discharge metal sheet is disposed opposite to each other, and one section space, interval; Wherein,
The first discharge metal sheet links to each other with the live wire output sleeve of power supply output plughole, and the second discharge metal sheet links to each other with the zero line output sleeve of power supply output plughole.
2. leakage current detection protection circuit with anti-/ lightning impulse resistant 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), filter capacitor (C3), be built-in with the tripping coil (SOL) of iron core, with at least one pair of major loop switch (KR2-1, KR2-2) of SR interlock, it is characterized in that:
This leakage current detection protection circuit comprises at least one group of discharge metal sheet; Most advanced and sophisticated or the discharge cambered surface of the first discharge metal sheet and the second discharge metal sheet is disposed opposite to each other, and one section space, interval;
The first discharge metal sheet links to each other with the power input live wire, and the second discharge metal sheet links to each other with the power input zero line.
3. a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function according to claim 2 is characterized in that:
The said first discharge metal sheet links to each other with the power input live wire through said tripping coil; The said second discharge metal sheet links to each other with the power input zero line.
4. a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function according to claim 2 is characterized in that:
The said second discharge metal sheet links to each other with the power input zero line, and the said first discharge metal sheet links to each other with the power input live wire that passes induction coil and self-excitation coil through said tripping coil.
5. a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function according to claim 2 is characterized in that:
Said first discharge metal sheet and power input live wire, the second discharge metal sheet links to each other with the power input zero line that passes induction coil and self-excitation coil.
6. a kind of leakage current detection protection circuit with anti-/ lightning impulse resistant function according to claim 2 is characterized in that:
Said first discharge metal sheet and the power input live wire that passes induction coil and self-excitation coil, the second discharge metal sheet links to each other with the power input zero line.
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| CN101895088A (en) * | 2009-05-20 | 2010-11-24 | 黄华道 | Leakage detection protection circuit |
| CN101931208A (en) * | 2009-06-19 | 2010-12-29 | 黄华道 | Leakage current detection protection circuit |
| CN201774227U (en) * | 2010-02-12 | 2011-03-23 | 黄华道 | Electric leakage detection protection circuit |
| CN201774226U (en) * | 2010-03-29 | 2011-03-23 | 黄华道 | Novel electricity-saving leakage detection protecting circuit |
| CN201774098U (en) * | 2010-04-22 | 2011-03-23 | 黄华道 | Novel earth leakage protection socket |
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Application publication date: 20121219 |