CN2862412Y - End-to-life display circuit for earth leakage protective receptacle - Google Patents
End-to-life display circuit for earth leakage protective receptacle Download PDFInfo
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- CN2862412Y CN2862412Y CN 200520147395 CN200520147395U CN2862412Y CN 2862412 Y CN2862412 Y CN 2862412Y CN 200520147395 CN200520147395 CN 200520147395 CN 200520147395 U CN200520147395 U CN 200520147395U CN 2862412 Y CN2862412 Y CN 2862412Y
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Abstract
The utility model discloses a circuit capable of indicating expired electric leakage protection socket. The display circuit consists of a red indicator lamp and a set/reset latch trigger thick-film circuit. The thick-film circuit has a first pin connected with the zero line at power input end penetrating through a leakage detection coil, serving as input end of automatically power-on simulated leakage current; a second pin connected with simulation test buttons, serving as input end of manually simulated leakage current; a third pin as signal output end connected with the red indicator lamp through a transistor; a fourth grounded pin; a fifth pin as input end of action detection state of tripping iron core of the socket; and a sixth pin serving as signal output end. The thick-film circuit automatically pre-simulates the socket functions at the time of switching on the electric leakage protection socket. When the socket is expired and has no protection function, an automatic reset preventing circuit prevents resetting the socket, and the red indicator lamp is lit to notify user to replace the socket, thereby preventing electric leakage. The circuit has good performance and is safe and reliable.
Description
Technical field
The utility model relates to a kind of indicator light display circuit, especially a kind of be applied in the earth leakage protective socket (GFCI), be used to show the particularly indicator light display circuit of end-of-life status of earth leakage protective socket state.
Background technology
Along with popularizing of household electrical appliance, when household electrical appliance offered convenience to people, its fail safe is paid more and more attention also, and therefore various protectors are born as the supply socket with creepage protection function thereupon.Yet meanwhile; fault has appearred if the problem of another worth people's deep thinking is exactly a protector itself; and the user does not know fully; in this case; protector has just lost the meaning of its existence; not only can not play a protective role, and, the get an electric shock generation of dead accident and electrical equipment damage accident of user also can be caused.So the safe condition of protector such as earth leakage protective socket itself also should be informed the user with a kind of mode, so that arouse attention, the protector that replacing has in time been broken down prevents the dead accident of electric shock that lost efficacy and cause owing to protector.
Yet at present, the earth leakage protective socket of selling on the market does not show all generally whether it still has the whether display circuit that whether stops of fault, life-span of creepage protection function, socket.Fig. 1 is existing physical circuit figure with supply socket (GFCI) internal control circuit of creepage protection function.As shown in the figure: it is mainly by rectifier diode D1-D4; be used to detect the magnetic test coil of two of leakage current 1000: 1 and 200: 1; toroidal winding SOL; controllable silicon SCR 1; control chip IC1 (the model: RV4145) that is used to trigger controllable silicon SCR 1 conducting that links to each other with the leakage current magnetic test coil; reset button RESET; analogue test button TEST; be connected on K switch and some resistance in the power supply circuits between earth leakage protective socket/plug-in power pack input LINE and the load output LOAD; electric capacity is formed.The end of solenoid SOL links to each other with input LINE power firestreak, and the other end links to each other with ground by controllable silicon SCR 1.Be built-in with release electromagnet T1 at toroidal winding SOL, be provided with in the termination of release electromagnet T1 and one have the iron plate T2 of through hole, between release electromagnet T1 and iron plate T2, be provided with a spring H.The release electromagnet T1 that is built in solenoid coil SOL inside be connected on that the K switch mechanical type in the power supply circuits links to each other between supply socket power input LINE and the load output LOAD, it can make closed K switch escape.K switch is connected in the power supply circuits between attaching plug/socket power input LINE and the load output LOAD, it is positioned at the following of reset button RESET and contacts with it, below reset button RESET, also be provided with the K switch 1 of a normally open, one end of K switch 1 links to each other with dc power anode by resistance R 4, and the other end links to each other with the gate pole of controllable silicon SCR 1.The gate pole of controllable silicon SCR 1 is that 5 pin of IC1 link to each other by the resistance R 10 and the triggering signal output of chip IC 1 also, and 1 pin of the signal input part IC1 of chip IC 1,7 pin link to each other with the signal output part of leakage current magnetic test coil.
When the intact supply socket of said structure with creepage protection function by correctly with after power firestreak, zero line in the wall links to each other; press reset button RESET; make K switch 1 closure; trigger controllable silicon SCR 1 conducting; there is electric current to flow through in the coil SOL; produce magnetic field; make the release electromagnet T1 action that is built in the coil SOL; bump iron plate T2 and K switch; after discharging reset button RESET, the K switch closure, K switch 1 disconnects; the power input LINE of supply socket has just realized that with load output LOAD electric power is connected, and supply socket has electric power output.When leaky occurring in load, the power supply circuits, magnetic test coil detects this phenomenon, output signal to chip IC 1 immediately, chip IC 1 is exported triggering signal immediately, makes controllable silicon SCR 1 conducting, making in the solenoid coil SOL has electric current to flow through, produce magnetic field, make to be positioned at its inner release electromagnet T1 and to move bump iron plate T2, K switch once more, closed K switch escape is disconnected, cut off load output LOAD and be connected with the electric power of input LINE.
But; when its internal electronic element breaks down; magnetic test coil for example; when controllable silicon SCR 1 or solenoid coil SOL open circuit; in case leakage current occurs; above-mentioned control circuit can't make in the solenoid coil SOL has electric current to flow through; coil SOL does not produce magnetic field; its built-in release electromagnet T1 just is failure to actuate; just can not clash into closed K switch yet; make the K switch escape; the cut off the electricity supply electric power output of socket, earth leakage protective socket has also just been lost its due creepage protection function, i.e. end-of-life; and; it does not have corresponding display circuit to inform the user again, and the user takes for it still to have creepage protection function and continue to use, and certainly will very easily cause the get an electric shock generation of dead accident of user.
Summary of the invention
In view of the foregoing, the purpose of this utility model provide a kind of be applied in the earth leakage protective socket, be used to show the particularly indicator light display circuit of end-of-life status of earth leakage protective socket state.Insert power supply moment at earth leakage protective socket, this display circuit carries out pre-preceding simulation detecting to the function of earth leakage protective socket automatically, when finding that current leakage jack life termination does not have defencive function, earth leakage protective socket can not be resetted automatic shielding reset operation path and the bright expression earth leakage protective socket of red led lost efficacy, informs that the user in time changes new product; This display circuit can also inform clearly that whether user's earth leakage protective socket is in operate as normal.
For achieving the above object, the utility model adopts following design: a kind of current leakage jack life termination display circuit is characterized in that: it by the red display lamp, put count/to reset to latch and trigger thick film circuit, triode, resistance and form;
The red display lamp is connected in parallel between the dc power anode and ground of rectifier diode output in the earth leakage protective socket control circuit with after triode, resistance are connected; The base stage of triode links to each other with the signal output pin 3 of thick film circuit by resistance;
The pin 1 of thick film circuit by lead with pass the earth leakage protective socket control circuit in the zero line of power input of leakage current magnetic test coil link to each other; The pin 4 of thick film circuit links to each other with ground;
The pin 2 of thick film circuit links to each other by the end of resistance with earth leakage protective socket analogue test button;
The pin 5 of thick film circuit links to each other with dc power anode in the earth leakage protective socket control circuit by the resistance of two series connection; Tie point between the resistance of two series connection is built in by a metal catch and earth leakage protective socket are original that release electromagnet links to each other in the solenoid coil; Simultaneously, release electromagnet links to each other with ground by spring, iron plate;
The pin 6 of thick film circuit links to each other with the silicon controlled gate pole by resistance, the switch that is positioned at below the reset button;
The pin 3,6 of thick film circuit links to each other with dc power anode by resistance respectively, for thick film circuit provides working power.
This display circuit also comprises a green display lamp and second triode;
Green display lamp is connected in parallel between the live wire and zero line of earth leakage protective socket load output with after second triode is connected; The base stage of second triode links to each other with another signal output pin 6 of thick film circuit by resistance.
In specific embodiment of the utility model, described put count/to reset to latch trigger thick film circuit and be formed by connecting by rest-set flip-flop, transistor, resistance, electric capacity; Pin 4 ground connection of thick film circuit, pin 2 is the R input of rest-set flip-flop, and pin 5 is the S input of rest-set flip-flop, and pin 3,6 is two signal output parts of rest-set flip-flop, pin 1 is an input end of analog signal, constitutes the OC door by transistor between pin 1 and the pin 4.
Advantage of the present utility model: insert power supply moment at earth leakage protective socket, can carry out pre-preceding simulation detecting to the function of earth leakage protective socket automatically, when finding that current leakage jack life termination does not have defencive function, earth leakage protective socket can not be resetted automatic shielding reset operation path and the bright expression earth leakage protective socket of red led lost efficacy, informs that the user in time changes new product; Simultaneously, also fundamentally stopped the user operate again and resetted by mistake may, so the utility model reduces the generation of the dead accident of electric shock effectively, performance is good, the utility model is safe and reliable.
Because the utility model adopts above design, when after the utility model resets work, carrying out the routine check, the user presses test switch TEST, when finding that the earth leakage protective socket inner member breaks down is that creepage protection function was when losing efficacy, earth leakage protective socket can not be resetted automatic shielding reset operation path and the bright expression earth leakage protective socket of red led lost efficacy, informs that the user in time changes new product; Simultaneously, also fundamentally stopped the user operate again and resetted by mistake may, so the utility model reduces the generation of the dead accident of electric shock effectively, the utility model is safe and reliable.
Description of drawings
Fig. 1 is existing earth leakage protective socket internal control circuit physical circuit figure
Fig. 2 is the annexation figure of the utility model end-of-life display circuit and the inner original control circuit of earth leakage protective socket
Embodiment
As shown in Figure 2, the utility model disclosed be applied in the earth leakage protective socket (GFCI), be used to show the earth leakage protective socket state particularly end-of-life status display circuit mainly by red display lamp LED1, green display lamp LED2, put count/to reset to latch and trigger thick film circuit IC2, triode V2, V3, resistance R 5～R9, R11～R13 and form.
Red display lamp LED1 is connected in parallel between the dc power anode and ground of rectifier diode D2 output with after triode V2, resistance R 3 are connected; The base stage of triode V2 links to each other with the signal output pin 3 of thick film circuit IC2 by resistance R 5.
Green display lamp LED2 is connected in parallel between live wire HOT, the zero line WHITE of earth leakage protective socket load output LOAD with after triode V3, resistance R 13, diode D3 connect; The base stage of triode V3 links to each other with another signal output pin 6 of thick film circuit IC2 by resistance R 8.
The pin 1 of thick film circuit IC2 links to each other with the power input LINE zero line WHITE that passes leakage current magnetic test coil L1, L2 by lead; The pin 4 of thick film circuit IC2 links to each other with ground, and the pin 1,4 of thick film circuit IC2 constitutes one and can simulate the OC door that the low resistance leakage current is tested automatically;
The pin 2 of thick film circuit IC2 links to each other with the end of earth leakage protective socket analogue test button TEST by resistance R 4;
The pin 5 of thick film circuit IC2 links to each other with the dc power anode of rectifier diode D2 output by resistance R 12, R11; Tie point A between resistance R 12, the R11 links to each other with the original release electromagnet T1 that is built in the solenoid coil SOL of earth leakage protective socket by catch T3; Release electromagnet T1, spring H, iron plate T2 are in contact with one another and link to each other with ground; Catch T3, release electromagnet T1, spring H and iron plate T2 constitute the perception close access.When earth leakage protective socket intact, when working properly, action along with release electromagnet T1, the catch T3 that links to each other with release electromagnet T1 or contact with release electromagnet T1, or do not contact with release electromagnet T1, the A point current potential that links to each other with catch T3 may be a low level, it may be high level, the utility model is exactly the variation that whether has level by the level that detection A is ordered, whether detect earth leakage protective socket working properly, whether can when leaky occurring, realize tripping operation, cut off the electric power output of socket;
The pin 6 of thick film circuit IC2 links to each other with the gate pole of controllable silicon SCR by resistance R 9, the K switch 1 that is positioned at below the reset button RESET;
The pin 3,6 of thick film circuit IC2 links to each other with dc power anode by resistance R 6, R7 respectively, and IC2 provides working power for thick film circuit.
In specific embodiment of the utility model, putting count/resets latchs and triggers thick film circuit IC2 (model ZQC-051208) and be formed by connecting by rest-set flip-flop, transistor, resistance, electric capacity.Pin 4 ground connection of thick film circuit IC2, pin 2 is the R input of rest-set flip-flop, pin 5 is the S input of rest-set flip-flop, pin 3,6 is two signal output parts of rest-set flip-flop, pin 1 is an input end of analog signal, constitute the OC door by transistor between pin 1 and the pin 4, simulate the test of low resistance leakage current automatically.
When live wire HOT, the zero line WHITE of the power input LINE of earth leakage protective socket with after power firestreak HOT, zero line WHITE in the wall links to each other, if earth leakage protective socket is intact, when having detection of electrical leakage, defencive function, the pin 1 of thick film circuit and pin 4 constitute the low-resistance electric magnetic switch and simulate a leakage current; After leakage current magnetic test coil L1, L2 detect this simulation leakage current, output signal to control chip IC1, the 5 pin output triggering signal of IC1 is given controllable silicon SCR, make the SCR conducting, have electric current to flow through in the coil SOL, produce magnetic field, make the release electromagnet T1 action that is built in the coil SOL, catch T3 separates with release electromagnet T1, and the tie point A between resistance R 11, the R12 becomes high level from low level, and the pin 5 of thick film circuit IC2 also becomes high level by low level.In the moment that earth leakage protective socket powers on, the pin 3 output high level of thick film circuit IC2, triode V2 conducting, red display lamp LED1 glimmers; When the pin 5 of thick film circuit IC2 becomes high level by low level; earth leakage protective socket work is described, and all are normal, have creepage protection function, and the signal output pin of thick film circuit IC2 3 becomes low level by high level; triode V2 ends, and red display lamp LED1 extinguishes.If the element fault in the earth leakage protective socket; no current flows through in the coil SOL; do not produce magnetic field; its built-in release electromagnet T1 is failure to actuate all the time; tie point A between resistance R 11, the R12 is always low level, and the pin 5 of thick film circuit IC2 also is always low level, and the pin 3 of thick film circuit IC2 is exported high level all the time; triode V2 conducting all the time, red display lamp LED1 is light yellow all the time.So, if red display lamp LED1 light yellow all the time illustrates this earth leakage protective socket inner member fault, having lost creepage protection function, the user need change new product; If red display lamp LED1 one dodges promptly go out, illustrate that earth leakage protective socket is intact, have creepage protection function, can continue to use.
When earth leakage protective socket is finished power-on self-test; after confirming that the earth leakage protective socket function is intact; the pin 6 output high level of thick film circuit IC2; make K switch 1 charged; push reset button RESET, make K switch 1 closure, because K switch 1 is charged; the controllable silicon SCR conducting; there is electric current to flow through in the coil SOL, produces magnetic field, make the release electromagnet T1 action that is built in the coil SOL; bump iron plate T2 and K switch; after discharging reset button RESET, make the K switch closure, K switch 1 disconnects; the power input LINE of supply socket has realized that with load output LOAD electric power is connected, and supply socket has electric power output.If behind the earth leakage protective socket power-on self-test; find that earth leakage protective socket has lost creepage protection function; end-of-life; pin 6 output low levels of thick film circuit IC2; make K switch 1 not charged; push reset button RESET; even K switch 1 closure, because K switch 1 is not charged, not conducting of controllable silicon SCR; no current flows through in the coil SOL; do not produce magnetic field, the release electromagnet T1 that is built in the coil SOL is failure to actuate, and does not clash into iron plate T2 and K switch; even discharge reset button RESET; K switch is not closed yet, and the power input LINE of supply socket does not realize that with load output LOAD electric power is connected, the output of supply socket unregulated power.
Said process is the pre-automatically preceding simulation detecting function that powers on that the utility model earth leakage protective socket is had; when current leakage jack life termination does not have defencive function; automatically shielding reset operation path makes the earth leakage protective socket unregulated power output that can not reset; and the bright expression earth leakage protective socket of red led lost efficacy, informed that the user in time changes new product.
When earth leakage protective socket is finished self check; confirm that socket is intact; after working properly; the pin 6 output high level of thick film circuit IC2, the base stage of triode V3 is a high level, when the K switch closure; when earth leakage protective socket load output has electric power output; triode V3 conducting, green display lamp LED2 is bright, the work of expression earth leakage protective socket.
The utility model resets after the work; when carrying out the routine check; the user presses analogue test button TEST simulation leakage current; its interlock signal is admitted to the pin 2 of thick film circuit IC2; if earth leakage protective socket inner member fault is that earth leakage protective socket loses defencive function; flow through with regard to no current in the coil SOL; do not produce magnetic field; the release electromagnet T1 that is built in the coil SOL is failure to actuate resistance R 11; the level of R12 tie point A can not change, and promptly the level variation can not take place the pin 5 of thick film circuit IC2; when thick film circuit IC2 finds that pin 5 does not exist level to change; its pin 3 output high level make triode V2 conducting, and LED1 is bright for the red display lamp; inform this current leakage jack life termination of user; lost defencive function, needed to change, in order to avoid cause the dead accident of unexpected electric shock.
In a word; the utility model adopts above design; in the earth leakage protective socket energized; the user operates before the reset button RESET; the utility model can be finished a creepage protection function automatically and survey; if find that it is that creepage protection function lost efficacy that the earth leakage protective socket inner member breaks down; then red display lamp LED1 is bright; even and press reset button RESET and also can't reset, inform that this earth leakage protective socket of user has lost creepage protection function, change immediately and should insert; the possibility that also can stop to operate again and be resetted by mistake; so the utility model can be guaranteed user's personal safety, and is safe and reliable.
The above only is an embodiment of the present utility model, and protection range of the present utility model is not limited thereto, and anyly all belongs to protection range of the present utility model based on the equivalent transformation on the circuit of the present utility model.
Claims (3)
1, a kind of current leakage jack life termination display circuit is characterized in that: it by red display lamp (LED1), put count/to reset to latch and trigger thick film circuit (IC2), triode (V2), resistance and form;
Red display lamp (LED1) is connected in parallel between the dc power anode and ground of rectifier diode in the earth leakage protective socket control circuit (D2) output with after triode (V2), resistance are connected; The base stage of triode (V2) links to each other by the signal output pin 3 of resistance with thick film circuit (IC2);
The pin 1 of thick film circuit (IC2) by lead with pass the earth leakage protective socket control circuit in the zero line of power input of leakage current magnetic test coil (L1, L2) link to each other; The pin 4 of thick film circuit (IC2) links to each other with ground;
The pin 2 of thick film circuit (IC2) links to each other by the end of resistance with earth leakage protective socket analogue test button (TEST);
The pin 5 of thick film circuit (IC2) links to each other with dc power anode in the earth leakage protective socket control circuit by the resistance (R12, R11) of two series connection; Tie point (A) between the resistance of two series connection (R12, R11) links to each other by the original interior release electromagnet of solenoid coil (SOL) (T1) that is built in of a metal catch (T3) and earth leakage protective socket; Simultaneously, release electromagnet (T1) links to each other with ground by spring (H), iron plate (T2);
The pin 6 of thick film circuit (IC2) links to each other with the gate pole of controllable silicon (SCR) by resistance, the switch (K1) that is positioned at below the reset button (RESET);
The pin 3,6 of thick film circuit (IC2) links to each other with dc power anode by resistance respectively, and (IC2) provides working power for thick film circuit.
2, current leakage jack life termination display circuit according to claim 1 is characterized in that: this display circuit also comprises a green display lamp (LED2) and second triode (V3);
Green display lamp (LED2) is connected in parallel between the live wire and zero line of earth leakage protective socket load output (LOAD) with after second triode (V3) is connected; The base stage of second triode (V3) links to each other with another signal output pin 6 of thick film circuit (IC2) by resistance.
3, current leakage jack life termination display circuit according to claim 1 and 2 is characterized in that: described put count/to reset to latch trigger thick film circuit (IC2) and be formed by connecting by rest-set flip-flop, transistor, resistance, electric capacity; Pin 4 ground connection of thick film circuit (IC2), pin 2 is the R input of rest-set flip-flop, and pin 5 is the S input of rest-set flip-flop, and pin 3,6 is two signal output parts of rest-set flip-flop, pin 1 is an input end of analog signal, constitutes the OC door by transistor between pin 1 and the pin 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520147395 CN2862412Y (en) | 2005-12-31 | 2005-12-31 | End-to-life display circuit for earth leakage protective receptacle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520147395 CN2862412Y (en) | 2005-12-31 | 2005-12-31 | End-to-life display circuit for earth leakage protective receptacle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2862412Y true CN2862412Y (en) | 2007-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520147395 Expired - Fee Related CN2862412Y (en) | 2005-12-31 | 2005-12-31 | End-to-life display circuit for earth leakage protective receptacle |
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| Country | Link |
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| CN (1) | CN2862412Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514766C (en) * | 2005-12-31 | 2009-07-15 | 黄华道 | Display circuit for the life expiration of the current leakage protection jack |
| CN105356409A (en) * | 2015-11-26 | 2016-02-24 | 余姚市嘉荣电子电器有限公司 | Automatic electrifying circuit for earth leakage protection apparatus |
-
2005
- 2005-12-31 CN CN 200520147395 patent/CN2862412Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100514766C (en) * | 2005-12-31 | 2009-07-15 | 黄华道 | Display circuit for the life expiration of the current leakage protection jack |
| CN105356409A (en) * | 2015-11-26 | 2016-02-24 | 余姚市嘉荣电子电器有限公司 | Automatic electrifying circuit for earth leakage protection apparatus |
| CN105356409B (en) * | 2015-11-26 | 2018-09-14 | 余姚市嘉荣电子电器有限公司 | The automatic electrification circuit of earth leakage protective device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |