CN202111458U - Electric leakage detection protection circuit with lightning impulse resistance function - Google Patents
Electric leakage detection protection circuit with lightning impulse resistance function Download PDFInfo
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- CN202111458U CN202111458U CN2011202066715U CN201120206671U CN202111458U CN 202111458 U CN202111458 U CN 202111458U CN 2011202066715 U CN2011202066715 U CN 2011202066715U CN 201120206671 U CN201120206671 U CN 201120206671U CN 202111458 U CN202111458 U CN 202111458U
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Abstract
The utility model discloses an electric leakage detection protection circuit with a lightning impulse resistance function. The electric leakage detection protection circuit is characterized by also comprising an analog power supply switch which is linked with a reset button, wherein the analog power supply switch is a monopole double throw switch; when the reset button is in a tripping state, a movable contact rod C of the analog power supply switch is connected with a second fixed contact end B and the analog power supply switch is in a closed state; when the reset button is pressed, the movable contact rod C of the analog power supply switch is disconnected with the second fixed contact end B and is automatically disconnected with a first fixed contact end A after being connected with the first fixed contact end A for a moment, and the analog power supply switch is automatically converted into in a closed connection state with the fixed contact end B; and after the reset button is reset, the movable contact rod C of the analog power supply switch is still in contact with the second fixed contact end B, and the analog power supply switch KR-2 is still in the closed sate.
Description
Technical field
The utility model relates to a kind of attaching plug or supply socket or interior leakage current detection protection circuit with lightning impulse resistant function of switch disconnector with creepage protection function that be installed in.
Background technology
Continuous development along with the supply socket with creepage protection function (being called for short GFCI), attaching plug, mains switch industry; People require 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 utility model people 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.
The utility model content
In view of the foregoing, the main purpose of the utility model provides a kind of leakage current detection protection circuit with anti-lightning impulse resistant function.
For realizing above-mentioned purpose; The utility model adopts following technical scheme: a kind of leakage current detection protection circuit with 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 group of major loop switch of SR interlock, it is characterized in that:
This leakage current detection protection circuit also comprises a simulation power switch that links with SR; This simulation power switch is a single-pole double-throw switch (SPDT), and when SR was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When SR was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch still contacted with the second quiet contact jaw B, and the simulation power switch still is in closure state.
This leakage current detection protection circuit also 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 said first discharge metal sheet links to each other with power supply output sleeve live wire, and the second discharge metal sheet links to each other with power supply output sleeve zero line.
In another technical scheme of the utility model, this leakage current detection protection circuit also 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 said first discharge metal sheet links to each other with power input live wire or zero line, and the second discharge metal sheet links to each other with the power input zero line or the live wire that pass induction coil and self-excitation coil.
In another technical scheme of the utility model, this leakage current detection protection circuit also 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 power input zero line; The second discharge metal sheet links to each other with the power input live wire that passes induction coil and self-excitation coil through the closure of simulation power switch; Particularly; The said second discharge metal sheet links to each other with the moving contact lever C of simulation power switch; The second quiet contact jaw B of simulation power switch links to each other with the power input live wire that passes induction coil and self-excitation coil, and the first quiet contact jaw A of simulation power switch links to each other with the power input live wire; Perhaps,
The said first discharge metal sheet links to each other with the power input live wire; The said second discharge metal sheet (links to each other with the power input zero line through the simulation power switch; Specifically; The discharge metal sheet links to each other with the moving contact lever C of simulation power switch; The second quiet contact jaw B of simulation power switch links to each other with the power input zero line that passes induction coil and self-excitation coil, and the first quiet contact jaw A of simulation power switch links to each other with the power input zero line.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances; After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire through tripping coil;
Specifically; After said first piezo-resistance and the series connection of second piezo-resistance; Its other end links to each other with the moving contact lever C of simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input zero line that passes induction coil and self-excitation coil, and the second quiet contact jaw B of simulation power switch links to each other with the power input zero line.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances; After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line; And two continuous common ports of piezo-resistance link to each other with the power input live wire through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire that passes induction coil and self-excitation coil, and the second quiet contact jaw B of simulation power switch links to each other with the power input live wire.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances;
After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the power input zero line, and the other end links to each other with the power input zero line that passes induction coil and self-excitation coil; And two continuous common ports of piezo-resistance finally link to each other with power firestreak through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch links to each other with the power input live wire that passes induction coil and self-excitation coil.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances; After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the power input zero line, and the other end links to each other with the power input zero line that passes induction coil and self-excitation coil; And two continuous common ports of piezo-resistance link to each other with the power firestreak output through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch links to each other with the power output end live wire.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances; After two piezo-resistance series connection, an end links to each other with the power input zero line, and the other end finally links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire that passes induction coil and self-excitation coil through tripping coil;
Specifically; The other end after two piezo-resistances are connected links to each other with the moving contact lever C of simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input zero line, and the second quiet contact jaw B of simulation power switch links to each other with the power input zero line that passes induction coil and self-excitation coil;
When SR was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When SR was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch still contacted with the second quiet contact jaw B, and the simulation power switch still is in closure state.
In another technical scheme of the utility model, this leakage current detection protection circuit also comprises at least two piezo-resistances; After two piezo-resistance series connection; One end links to each other with the power input zero line; The other end links to each other with the moving contact lever C of simulation power switch, and the first quiet contact jaw A of simulation power switch links to each other with the power input zero line, and the second quiet contact jaw B of simulation power switch links to each other with the power output end zero line; And two continuous common ports of piezo-resistance link to each other with the power input live wire that passes induction coil and self-excitation coil through tripping coil;
When SR was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When SR was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch still contacted with the second quiet contact jaw B, and the simulation power switch still is in closure state.
In another technical scheme of the utility model; Said this leakage current detection protection circuit also comprises a timing testing circuit chip; The power supply input pin of this timing chip links to each other with controllable silicon anode and tripping coil, and the working earthing pin of said timing detection chip links to each other with controllable silicon negative electrode pin zero line; Said timing detection chip control triggers pin and links to each other with controllable silicon triggering pin.
In another technical scheme of the utility model; Said this leakage current detection protection circuit also comprises at least one group of false wiring indicator light circuit that links to each other with the normally closed switch of SR interlock; This false wiring indicator light circuit is made up of indicator light, diode, resistance; After said normally closed switch, indicator light, diode, the resistance series connection, an end links to each other with power supply sleeve zero line, and the other end links to each other with power supply sleeve live wire.
Description of drawings
Fig. 1 is the utility model leakage current detection protection circuit embodiment 1 physical circuit figure;
Fig. 2 is the utility model leakage current detection protection circuit embodiment 2 physical circuit figure;
Fig. 3 is the utility model leakage current detection protection circuit embodiment 3 physical circuit figure;
Fig. 4 is the utility model leakage current detection protection circuit embodiment 4 physical circuit figure;
Fig. 5 is the utility model leakage current detection protection circuit embodiment 5 physical circuit figure;
Fig. 6 is the utility model leakage current detection protection circuit embodiment 6 physical circuit figure.
Embodiment
Like Fig. 1-shown in Figure 6, the leakage current detection protection circuit that the utility model is disclosed to have a lightning impulse resistant function 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 an integral body that links to each other; The zero line output sleeve of power output end LOAD zero line and power supply output plughole becomes an integral body that links 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 IC 1 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, and timer chip DSQ regularly sends triggering signal, makes controllable silicon V4 conducting, can operate as normal thereby detect leakage current detection protection circuit.
As shown in Figure 1, the utility model also comprises the simulation power switch KR-2 that at least one and SR link.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 and the place of working input pin of timer chip DSQ.
The working power input 6 of control chip IC1 links to each other with power input live wire HOT through current-limiting resistance R1, diode V1, tripping coil SOL, and the working power input of the anode of controllable silicon V4 and timer chip DSQ links to each other with power input live wire HOT through tripping coil SOL.
When SR RESET was in trip status, the moving contact lever C of this simulation power switch KR-2 linked to each other with the second quiet contact jaw B, and simulation power switch KR-2 is in closure state; When SR RESET was pressed, the moving contact lever C and the second quiet contact jaw B of simulation power switch KR-2 broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch KR-2 transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resets; The moving contact lever C of simulation power switch KR-2 still contacts with the second quiet contact jaw B; Simulation power switch KR-2 still is in closure state, and coincidence circuit K switch R-2-1, KR-2-2 also are in closure state, and output has power supply output.
Because the utility model simulation power switch KR-2 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.
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, like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, shown in Figure 6, the utility model 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 utility model specific embodiment, 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.Most advanced and sophisticated or the discharge cambered surface of discharge metal sheet M3, M4 is disposed opposite to each other, and interval one section space 0.7mm-1.5mm
.Wherein a slice discharge metal sheet M3 links to each other with the power input live wire, discharge metal sheet M4 with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2.Perhaps, like Fig. 2, Fig. 3, Fig. 4, shown in Figure 6, discharge metal sheet M3 links to each other with the power input zero line, discharge metal sheet M4 with pass the power input 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 utility model; The said at least one group of discharge metal sheet that comprises can also be placed on other position, through simulation power switch KR-2 with pass power input live wire or the zero line of induction coil L 1 and link to each other with self-excitation coil L2.Like discharge metal sheet M7, the M8 among Fig. 3.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, another sheet discharge metal sheet M8 through the closure 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.As shown in Figure 3; Discharge metal sheet M8 links to each other with the moving contact lever C of simulation power switch KR-2; The second quiet contact jaw B 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 first quiet contact jaw A that simulates power switch KR-2 links to each other with the power input live wire.
The connected mode of discharge metal sheet M7 among Fig. 5, the connected mode of M8 and the discharge metal sheet M7 among Fig. 3, M8 is basic identical.Its difference is: the discharge metal sheet M7 among Fig. 5 links to each other with the power input live wire, and discharge metal sheet M8 finally links to each other with the power input zero line 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 second quiet contact jaw B 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 first quiet contact jaw A that simulates power switch KR-2 links to each other with the power input zero line.
In the disclosed leakage current detection protection circuit with lightning impulse resistant function of the utility model, also comprise at least two piezo-resistance YM1, YM2.When voltage in a flash surpassed the magnitude of voltage of setting, piezo-resistance YM1, YM2 can bleed off electric current, in the protective circuit continuous electronic component comprise the effect of circuit.
As shown in Figure 1, after piezo-resistance YM1, the YM2 series connection, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line through the closure of simulation power switch KR-2; And the common port that piezo-resistance YM1 links to each other with YM2 links to each other with the power input live wire through tripping coil SOL.Specifically; After piezo-resistance YM1 and the YM2 series connection; Its other end 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.
When SR RESET was in trip status, the moving contact lever C of this simulation power switch KR-2 linked to each other with the second quiet contact jaw B, and simulation power switch KR-2 is in closure state; When SR RESET was pressed, the moving contact lever C and the second quiet contact jaw B of simulation power switch KR-2 broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch KR-2 transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch KR-2 still contacted with the second quiet contact jaw B, and simulation power switch KR-2 still is in closure state.Coincidence circuit K switch R-2-1, KR-2-2 also are in closure state, and load end has power supply output, and the LED1 lamp is bright.
As shown in Figure 2, in another embodiment of the utility model, after piezo-resistance YM1 and the YM2 series connection, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line; And the common port that piezo-resistance YM1 links to each other with YM2 links to each other with the power input live wire through the closure of tripping coil SOL, simulation power switch KR-2.Specifically; The common port that piezo-resistance YM1 links to each other with YM2 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 the another embodiment of utility model, as shown in Figure 3, after piezo-resistance YM1 and the YM2 series connection, an end links to each other with the power input zero line, the other end with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2; And the common port that piezo-resistance YM1 links to each other with YM2 is through the closure of tripping coil SOL, simulation power switch KR-2
FinallyLink to each other with power firestreak.Specifically; The common port that piezo-resistance YM1 links to each other with YM2 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, the second quiet contact jaw B that simulates 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.
In the another embodiment of utility model, as shown in Figure 4, after piezo-resistance YM1 and the YM2 series connection, an end links to each other with the power input zero line, the other end with pass the power input zero line of induction coil L1 and link to each other with self-excitation coil L2; And the common port that piezo-resistance YM1 links to each other with YM2 links to each other with the power output end live wire through the closure of tripping coil SOL, simulation power switch KR-2.Specifically; The common port that piezo-resistance YM1 links to each other with YM2 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 an embodiment again of utility model, as shown in Figure 5, after piezo-resistance YM1 and the YM2 series connection, an end links to each other with the power input zero line, and the other end finally links to each other with the power input zero line through the closure of simulation power switch KR-2; And, the common port that piezo-resistance YM1 links to each other with YM2 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.Specifically; The other end after piezo-resistance YM1 and the YM2 series connection 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, the second quiet contact jaw B that simulates 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.
When SR RESET was in trip status, the moving contact lever C of this simulation power switch KR-2 linked to each other with the second quiet contact jaw B, and simulation power switch KR-2 is in closure state; When SR RESET was pressed, the moving contact lever C and the second quiet contact jaw B of simulation power switch KR-2 broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch KR-2 transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch KR-2 still contacted with the second quiet contact jaw B, and simulation power switch KR-2 still is in closure state.Coincidence circuit K switch R-2-1, KR-2-2 also are in closure state, and load end has power supply output, and the LED1 lamp is bright.
In an embodiment again of utility model; As shown in Figure 6; After piezo-resistance YM1 and the YM2 series connection, an end links to each other with the power input zero line, and the other end 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; And, the common port that piezo-resistance YM1 links to each other with YM2 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.
When SR RESET was in trip status, the moving contact lever C of this simulation power switch KR-2 linked to each other with the second quiet contact jaw B, and simulation power switch KR-2 is in closure state; When SR RESET was pressed, the moving contact lever C of simulation power switch KR-2 and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, the simulation power switch KR-2 state that links to each other with quiet contact jaw B closure automatically; After SR resetted, the moving contact lever C of simulation power switch KR-2 still contacted with the second quiet contact jaw B, and simulation power switch KR-2 still is in closure state.Coincidence circuit K switch R-2-1, KR-2-2 also are in closure state, and load end has power supply output, and the LED1 lamp is bright.
In order in time to react the operating state of leakage current detection protection circuit, as shown in Figure 6, the utility model also comprises display circuit.This display circuit is made up of power supply output indicator LED3, diode V6 and current-limiting resistance R6.After power supply output indicator LED3, 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, LED3 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; Though SR RESET is in trip status; But LED3 is still bright for this power supply output indicator, 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 LED3 did not work yet.
Fig. 3, leakage current detection protection circuit shown in Figure 5 comprise a wiring error display circuit.This wiring error display circuit is made up of normally closed switch KR-4, indicator light LED3, diode V6 and the current-limiting resistance R6 with the SR interlock.After normally closed switch KR-4, 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-4 closure, when SR RESET was in reset mode, K switch R-4 broke off, and indicator light LED3 can not light, and the expression wiring is correct.
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-4 is in closure state; Indicator light LED3 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-4 was in closure state, because the leakage current detection protection circuit power output end is not charged, so indicator light LED3 does not work.
Above-mentioned wiring error display circuit can also be made up of normally closed switch KR-3, indicator light V8, diode V7 and current-limiting resistance R7 with the SR interlock like Fig. 1, Fig. 2, Fig. 4, shown in Figure 6.After normally closed switch KR-3, indicator light V8, diode V7 and the current-limiting resistance R7 of SR interlock connected, an end linked to each other with power supply output sleeve live wire, and the other end links to each other with power supply output sleeve 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; Though SR RESET is in trip status; But K switch R-3 is in closure state, and indicator light V8 is bright, shows this leakage current detection protection circuit wiring error.When installer's wiring was correct, even SR RESET is in reset mode, K switch R-3 was in off-state; Because indicator light circuit diode, resistance, LED2 are not charged, so indicator light V8 does not work yet; Represent correct wiring, relay indicating light LED1 is bright.
Like Fig. 1-shown in Figure 6, the utility model 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.
The utility model analog operation indicator light circuit 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 the utility model analog operation indicator light circuit unites two into one two kinds of functions, circuit is more succinct.
The utility model has the advantages that: 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, 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.
It is that wherein a piezo-resistance one end links to each other with input live wire or zero line that the utility model also has an advantage, and the other end is connected and passes two induction coils and link to each other with power output end zero line or live wire.Such method of attachment makes piezo-resistance when superpressure is discharged, will produce leakage current automatically, and circuit power is cut off in the automatic trip of guiding tripping mechanism, plays the effect of protecting electronic component once more.
The above is specific embodiment of the utility model and the know-why of being used, and is any based on the equivalent transformation on the utility model technical scheme basis, all belongs within the utility model protection range.
Claims (12)
1. leakage current detection protection circuit with lightning impulse resistant function; It comprises 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 iron core tripping coil (SOL), with at least one group of major loop switch (KR2-1, KR2-2) of SR interlock, it is characterized in that:
This leakage current detection protection circuit also comprises a simulation power switch (KR-2) that links with SR; This simulation power switch (KR-2) is a single-pole double-throw switch (SPDT), and when SR was in trip status, the moving contact lever C of this simulation power switch (KR-2) linked to each other with the second quiet contact jaw B, and simulation power switch (KR-2) is in closure state; When SR was pressed, the moving contact lever C of simulation power switch (KR-2) and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and simulation power switch (KR-2) transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch (KR-2) still contacted with the second quiet contact jaw B, and simulation power switch (KR-2) still is in closure state.
2. a kind of leakage current detection protection circuit with lightning impulse resistant function according to claim 1 is characterized in that: this leakage current detection protection circuit also 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 said first discharge metal sheet links to each other with power supply output sleeve live wire, and the second discharge metal sheet links to each other with power supply output sleeve zero line.
3. a kind of leakage current detection protection circuit with lightning impulse resistant function according to claim 1 is characterized in that: this leakage current detection protection circuit also 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 said first discharge metal sheet links to each other with power input live wire or zero line, and the second discharge metal sheet links to each other with the power input zero line or the live wire that pass induction coil and self-excitation coil.
4. a kind of leakage current detection protection circuit with lightning impulse resistant function according to claim 1 is characterized in that: this leakage current detection protection circuit also 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 power input zero line;
The second discharge metal sheet links to each other with the power input live wire that passes induction coil and self-excitation coil through the closure of simulation power switch (KR-2); Particularly; The said second discharge metal sheet links to each other with the moving contact lever C of simulation power switch (KR-2); The second quiet contact jaw B of simulation power switch (KR-2) links to each other with the power input live wire that passes induction coil and self-excitation coil, and the first quiet contact jaw A of simulation power switch (KR-2) links to each other with the power input live wire; Perhaps,
The said first discharge metal sheet links to each other with the power input live wire;
The said second discharge metal sheet links to each other with the power input zero line through simulation power switch (KR-2); Specifically; The discharge metal sheet links to each other with the moving contact lever C of simulation power switch (KR-2); The second quiet contact jaw B of simulation power switch (KR-2) links to each other with the power input zero line that passes induction coil and self-excitation coil, and the first quiet contact jaw A of simulation power switch (KR-2) links to each other with the power input zero line.
5. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances (YM1 and YM2);
After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire through tripping coil;
Specifically; After said first piezo-resistance and the series connection of second piezo-resistance; Its other end links to each other with the moving contact lever C of simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input zero line that passes induction coil and self-excitation coil, and the second quiet contact jaw B of simulation power switch links to each other with the power input zero line.
6. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances;
After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the zero line output sleeve of power supply output plughole, and the other end links to each other with the power input zero line; And two continuous common ports of piezo-resistance link to each other with the power input live wire through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire that passes induction coil and self-excitation coil, and the second quiet contact jaw B of simulation power switch links to each other with the power input live wire.
7. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances;
After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the power input zero line, and the other end links to each other with the power input zero line that passes induction coil and self-excitation coil; And two continuous common ports of piezo-resistance finally link to each other with power firestreak through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch links to each other with the power input live wire that passes induction coil and self-excitation coil.
8. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances;
After said first piezo-resistance and the series connection of second piezo-resistance, an end links to each other with the power input zero line, and the other end links to each other with the power input zero line that passes induction coil and self-excitation coil; And two continuous common ports of piezo-resistance link to each other with the power firestreak output through the closure of tripping coil, simulation power switch;
Specifically; The common port that said first piezo-resistance links to each other with second piezo-resistance links to each other through the moving contact lever C of tripping coil with the simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input live wire, and the second quiet contact jaw B of simulation power switch links to each other with the power output end live wire.
9. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances;
After two piezo-resistance series connection, an end links to each other with the power input zero line, and the other end finally links to each other with the power input zero line through the closure of simulation power switch; And two continuous common ports of piezo-resistance link to each other with the power input live wire that passes induction coil and self-excitation coil through tripping coil;
Specifically; The other end after two piezo-resistances are connected links to each other with the moving contact lever C of simulation power switch; The first quiet contact jaw A of simulation power switch links to each other with the power input zero line, and the second quiet contact jaw B of simulation power switch links to each other with the power input zero line that passes induction coil and self-excitation coil;
When SR was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When SR was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch still contacted with the second quiet contact jaw B, and the simulation power switch still is in closure state.
10. according to the described a kind of leakage current detection protection circuit with lightning impulse resistant function of one of claim 1 to 4, it is characterized in that: this leakage current detection protection circuit also comprises at least two piezo-resistances;
After two piezo-resistance series connection; One end links to each other with the power input zero line; The other end links to each other with the moving contact lever C of simulation power switch, and the first quiet contact jaw A of simulation power switch links to each other with the power input zero line, and the second quiet contact jaw B of simulation power switch links to each other with the power output end zero line; And two continuous common ports of piezo-resistance link to each other with the power input live wire that passes induction coil and self-excitation coil through tripping coil;
When SR was in trip status, the moving contact lever C of this simulation power switch linked to each other with the second quiet contact jaw B, and the simulation power switch is in closure state; When SR was pressed, the moving contact lever C of simulation power switch and the second quiet contact jaw B broke off, and contact automatic disconnection in a flash with the first quiet contact jaw A, and the simulation power switch transfers the closed state that links to each other with quiet contact jaw B automatically to; After SR resetted, the moving contact lever C of simulation power switch still contacted with the second quiet contact jaw B, and the simulation power switch still is in closure state.
11. a kind of leakage current detection protection circuit according to claim 1 with anti-lightning impulse resistant function; It is characterized in that: said this leakage current detection protection circuit also comprises a timing testing circuit chip (DSQ); The power supply input pin (VCC) of this timing chip (DSQ) links to each other with controllable silicon anode and tripping coil, and the working earthing pin (GND) of said timing detection chip links to each other with controllable silicon negative electrode pin zero line; Said timing detection chip control triggers pin (OUT) and links to each other with controllable silicon triggering pin.
12. a kind of leakage current detection protection circuit according to claim 1 with anti-lightning impulse resistant function; It is characterized in that: said this leakage current detection protection circuit also comprises at least one group of false wiring indicator light circuit that links to each other with the normally closed switch (KR-3) of SR interlock; This false wiring indicator light circuit is made up of indicator light (LED2), diode (V7), resistance (R7); After said normally closed switch (KR-3), indicator light (LED2), diode (V7), resistance (R7) series connection; One end links to each other with power supply sleeve zero line, and the other end links to each other with power supply sleeve live wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202066715U CN202111458U (en) | 2011-06-17 | 2011-06-17 | Electric leakage detection protection circuit with lightning impulse resistance function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202066715U CN202111458U (en) | 2011-06-17 | 2011-06-17 | Electric leakage detection protection circuit with lightning impulse resistance function |
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| Publication Number | Publication Date |
|---|---|
| CN202111458U true CN202111458U (en) | 2012-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
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- 2011-06-17 CN CN2011202066715U patent/CN202111458U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832591A (en) * | 2011-06-17 | 2012-12-19 | 黄华道 | Electricity leakage detecting protection circuit with function of lightning impulse resistance |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20160907 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |