CN201774224U - Novel electric-leakage detection protection circuit - Google Patents
Novel electric-leakage detection protection circuit Download PDFInfo
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- CN201774224U CN201774224U CN2010202721670U CN201020272167U CN201774224U CN 201774224 U CN201774224 U CN 201774224U CN 2010202721670 U CN2010202721670 U CN 2010202721670U CN 201020272167 U CN201020272167 U CN 201020272167U CN 201774224 U CN201774224 U CN 201774224U
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Abstract
The utility model discloses an electric-leakage detection protection circuit comprising an induction coil for detecting leakage current, a self-detection coil for detecting low-resistance faults, a control chip, a tripping coil with an iron core internally and a silicon controlled thyristor; the electric-leakage detection protection circuit is characterized in that: the electric-leakage detection protection circuit further comprises a detection switch for detecting whether the service life of the electric-leakage detection protection circuit is ended; and the electric-leakage detection protection circuit can produce simulation leakage current automatically/manually, so as to detect whether the service life of the electric-leakage detection protection circuit is ended.
Description
Technical field
The utility model relates to a kind of circuit with detection of electrical leakage, defencive function that is installed in the supply socket.
Background technology
Along with the continuous development of the supply socket with creepage protection function (be called for short GFCI) industry, people are to the function of supply socket with creepage protection function, safety in utilization, reliability, useful life etc. requiring more and more higher.This makes that the insider constantly is devoted to study, improve the leakage current detection protection circuit that is installed in the supply socket, makes more succinct, the with better function strength of its circuit, uses safer, more reliable, the longer service life of work.
Summary of the invention
In view of the foregoing, main purpose of the present utility model provides a kind of new pattern creepage detection protective circuit in the supply socket, that have life end checking function that is installed in.
Another purpose of the present utility model provides a kind of to because thunderbolt or the instantaneous pressure that causes of other reasons have the new pattern creepage detection protective circuit of protective effect to the destruction that supply socket and the miscellaneous equipment that links to each other with supply socket cause.
For achieving the above object, the utility model is by the following technical solutions: a kind of leakage current detection protection circuit, it comprises the induction coil that is used to detect leakage current, be used to detect the low resistance fault from magnetic test coil, control chip, the tripping coil that is built-in with iron core, controllable silicon; It is characterized in that: this leakage current detection protection circuit also includes one and is used to detect the whether sense switch of end-of-life of this leakage current detection protection circuit.
One end of described sense switch links to each other with power input zero line/live wire through current-limiting resistance, the other end with pass the described induction coil that is used to detect leakage current and link to each other with the power input live wire/zero line that is used to detect the low resistance fault from magnetic test coil.
In preferred embodiment of the present utility model, described sense switch is a normally closed switch; After the power line in leakage current detection protection circuit power input and the wall connects, automatically produce the simulation leakage current, detect whether end-of-life of this leakage current detection protection circuit automatically; Immediately, described sense switch disconnects, and the simulation leakage current disappears.
In another preferred embodiment of the present utility model, described sense switch is a normal open switch, the testing button interlock of this sense switch and supply socket; Push testing button, described sense switch closure manually produces the simulation leakage current, detects whether end-of-life of this leakage current detection protection circuit; Discharge testing button (TEST), described sense switch disconnects, and the simulation leakage current disappears.
In another preferred embodiment of the present utility model, described sense switch is a normal open switch; This sense switch and reset button interlock, when reset button was pressed, this sense switch closure discharged reset button, and this sense switch disconnects already; One end of this sense switch links to each other with described silicon controlled trigger electrode, and the other end links to each other with the working power input of described control chip by resistance; After the power line in leakage current detection protection circuit power input and the wall connected, the manual triggers controllable silicon detected whether end-of-life of leakage current detection protection circuit.
In another preferred embodiment of the present utility model, described sense switch is a normally closed switch; One end of described sense switch links to each other with the power input zero line through current-limiting resistance, the other end with pass the described induction coil that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil; After the power line in leakage current detection protection circuit power input and the wall connects, produce the low resistance fault current automatically, detect whether end-of-life of leakage current detection protection circuit.
Description of drawings
Fig. 1 is the disclosed leakage current detection protection circuit embodiment 1 physical circuit figure of the utility model;
Fig. 2 is the disclosed leakage current detection protection circuit embodiment 2 physical circuit figure of the utility model;
Fig. 3 is the disclosed leakage current detection protection circuit embodiment 3 physical circuit figure of the utility model;
Fig. 4 is the disclosed leakage current detection protection circuit embodiment 4 physical circuit figure of the utility model;
Fig. 4-1 is the disclosed leakage current detection protection circuit embodiment 5 physical circuit figure of the utility model;
Fig. 5 is the disclosed leakage current detection protection circuit embodiment 6 physical circuit figure of the utility model;
Fig. 5-1 is the disclosed leakage current detection protection circuit embodiment 7 physical circuit figure of the utility model;
Fig. 6 is the disclosed leakage current detection protection circuit embodiment 8 physical circuit figure of the utility model;
Fig. 7 is the disclosed leakage current detection protection circuit embodiment 9 physical circuit figure of the utility model.
Embodiment
Fig. 1 is installed in the leakage current detection protection circuit physical circuit figure with detection of electrical leakage, defencive function in the supply socket for the utility model is disclosed.As shown in Figure 1, this leakage current detection protection circuit comprise the induction coil L1 (1000: 1) that is used to detect leakage current, be used to detect the low resistance fault from magnetic test coil L2 (200: 1), control chip IC1 (RV4145), the tripping coil SOL that is built-in with iron core, controllable silicon V4, sense switch KR-1, with simulation leakage current generating K switch R-5, halfwave rectifier diode V1, normally closed switch K1, the normal open switch K2 of testing button TEST interlock.
Live wire HOT, the zero line WHITE of leakage current detection protection circuit power input LINE (being the power input of supply socket) pass the induction coil L1 (1000: 1) that is used to detect leakage current, be used to detect the low resistance fault behind magnetic test coil L2 (200: 1), link to each other with live wire HOT, the zero line WHITE of power output end (being the power output end of the supply socket) LOAD of leakage current detection protection circuit by mains switch KR-2-1, KR-2-2 with supply socket reset button RESET interlock; Simultaneously, pass the induction coil L1 (1000: 1) that is used to detect leakage current, the power input live wire that is used to detect the low resistance fault, zero line also by linking to each other with power firestreak, the zero line output plughole on supply socket surface with another group mains switch KR-3-1, the KR-3-2 of supply socket reset button RESET interlock from magnetic test coil L2 (200: 1).
Be used to detect the induction coil L1 (1000: 1) of leakage current, the signal output part from magnetic test coil L2 (200: 1) that is used to detect the low resistance fault links to each other with the signal input part 1,2,3,7 of control chip IC1, the control signal output ends 5 of control chip IC1 links to each other with the trigger electrode of controllable silicon V4.The working power input 6 of control chip IC1 links to each other with the live wire HOT of the power input LINE of leakage current detection protection circuit by resistance R 1, halfwave rectifier diode V1, K switch 1/K2, tripping coil SOL.The place of working pin 4 of control chip IC1 links to each other with the zero line WHITE of power input LINE.
The anode of controllable silicon V4 links to each other with the live wire HOT of the power input LINE of leakage current detection protection circuit by normally closed switch K1/ normal open switch K2, tripping coil SOL, and the negative electrode of controllable silicon V4 links to each other with the zero line WHITE of power input LINE.
As shown in Figure 1, the end of tripping coil SOL links to each other with the live wire HOT of power input LINE; The other end of tripping coil SOL links to each other with the anode of controllable silicon V4, the working power input of control chip IC1 by normally closed switch K1/ normal open switch K2, for controllable silicon V4 and control chip IC1 provide working power.When reset button RESET is in trip status, normally closed switch K1 closure, normal open switch K2 disconnects, the end of tripping coil SOL links to each other with the live wire HOT of power input LINE, the other end of tripping coil SOL links to each other with the anode of controllable silicon V4, the working power input of control chip IC1 by closed normally closed switch K1, for controllable silicon V4 and control chip IC1 provide working power.When reset button RESET is in reset mode, normally closed switch K1 disconnects, normal open switch K2 closure, the end of tripping coil SOL links to each other with the live wire HOT of power input LINE, the other end of tripping coil SOL links to each other with the anode of controllable silicon V4, the working power input of control chip IC1 by closed normal open switch K2, for controllable silicon V4 and control chip IC1 provide working power.
As shown in Figure 1, this leakage current detection protection circuit comprises a simulation leakage current generating K switch R-5 who links with testing button TEST.The end of this simulation leakage current generating K switch R-5 links to each other with the zero line of power input LINE by current-limiting resistance R3, and the other end links to each other with the live wire of power output end.Push testing button TEST, this simulation leakage current generating K switch R-5 closure, the zero line of power input links to each other with the live wire of power output end through current-limiting resistance R3, closed simulation leakage current generating K switch R-5, forms the loop, produces the simulation leakage current.After leakage current detection protection circuit detects this leakage current, make the mechanical component action in the supply socket, make reset button RESET tripping operation, the power supply output of the socket of cutting off the electricity supply.
As shown in Figure 1, this leakage current detection protection circuit also comprises a sense switch KR-1.This sense switch KR-1 is a normally closed switch, the end of sense switch KR-1 links to each other with the zero line of power input through current-limiting resistance R3, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with the live wire that is used to detect the low resistance fault from the power input of magnetic test coil L2.
After the power line in disclosed leakage current detection protection circuit power input of the utility model and the wall connects, need not to operate any parts, just can produce the simulation leakage current automatically, detect whether end-of-life of this leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, then this leakage current detection protection circuit makes the mechanical component action in the supply socket, produces the simulation leakage current automatically, and sense switch KR-1 automatic disconnection waits for that reset button resets; Otherwise, if the leakage current detection protection circuit end-of-life, then this leakage current detection protection circuit is failure to actuate by making the mechanical component in the supply socket, stops reset button to reset.
As shown in Figure 1; after the power line in disclosed leakage current detection protection circuit power input of the utility model and the wall connects; need not to operate any parts; because sense switch KR-1 is a normally closed switch; the zero line of power input through current-limiting resistance R3, closed sense switch KR-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2; form the closed-loop path; automatically produce the simulation leakage current; sense switch KR-1 automatic disconnection waits for that reset button resets.
If leakage current detection protection circuit does not have end-of-life, the induction coil L1 that then is used to detect leakage current detects this leakage current, output signal to control chip IC1, the 5 pin output high level signal of control chip IC1, trigger controllable silicon V4, make controllable silicon V4 conducting, there is electric current to flow through in the tripping coil SOL, produce magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, make the mechanical device action in the supply socket, snap close is opened, the reset guide lock passes lockhole, waits for that reset button resets; Simultaneously, the mechanical device action in the supply socket disconnects sense switch KR-1, and the simulation leakage current disappears.At this moment, push reset button RESET, the reset button success that resets, leakage current detection protection circuit power output end LOAD has power supply output, and proving has element to break in the circuit.
Otherwise, if the leakage current detection protection circuit end-of-life, then 5 pin of control chip IC1 are always low level, do not trigger controllable silicon V4, not conducting of controllable silicon V4, no current flows through in the tripping coil SOL, and no magnetic field produces in the tripping coil SOL, and the iron core that is built in the tripping coil SOL is failure to actuate, mechanical device in the supply socket is failure to actuate, snap close can't be opened, and reset button can't reset all the time, and leakage current detection protection circuit power output end LOAD does not have power supply output; Sense switch KR-1 is closed all the time, and the simulation leakage current does not disappear.
In supply socket or leakage current detection protection circuit course of normal operation, if occur leaky or low resistance fault in the supply socket power supply circuits, induction coil L1 or output signal to control chip IC1 then from magnetic test coil L2, the pin 5 output high level of control chip IC1, trigger controllable silicon V4 conducting, there is electric current to flow through in the tripping coil SOL, produce magnetic field in the tripping coil SOL, make the iron core action that is built in the tripping coil SOL, thereby make the mechanical device action in the supply socket, reset button RESET in the supply socket is threaded off, K switch R-2-1 with reset button RESET interlock, KR-2-2, KR-3-1, KR-3-2 disconnects, the power supply output of the socket/leakage current detection protection circuit of cutting off the electricity supply; Normal open switch K2 changes off-state into from closure state, normally closed switch K1 changes closure state into from off-state again, sense switch KR-1 changes closure state into from off-state, produce the simulation leakage current, sense switch KR-1 changes off-state into from closure state again immediately, waits for that reset button resets.Wait to produce the reason elimination of leaky or low resistance fault, push reset button, reset button just can reset.
In supply socket or leakage current detection protection circuit course of normal operation; if want to cut off the power supply output of leakage current detection protection circuit or supply socket; then push testing button TEST; make K switch R-5 closure; the live wire HOT of power output end is through the K switch R-5 of closure; current-limiting resistance R3 links to each other with the zero line WHITE of power input; form the closed-loop path; manually produce the simulation leakage current; if this moment, leakage current detection protection circuit did not have end-of-life; then this leakage current detection protection circuit makes the mechanical component action in the supply socket; reset button is threaded off; make K switch R-2-1 with reset button RESET interlock; KR-2-2; KR-3-1; KR-3-2 disconnects, and the power supply of the socket/leakage current detection protection circuit of cutting off the electricity supply is exported the output of cutting off the electricity supply.Discharge testing button TEST, K switch R-5 disconnects, and manually simulates leakage current and disappears; Moment, the closed simulation leakage current that produces automatically of sense switch KR-1, sense switch KR-1 changes off-state into from closure state again immediately, and the simulation leakage current disappears, and waits for that reset button resets.
Fig. 2 is the utility model leakage current detection protection circuit embodiment 2 physical circuit figure.Leakage current detection protection circuit shown in Figure 2 is identical with the operation principle of leakage current detection protection circuit shown in Figure 1, and its difference is: in the leakage current detection protection circuit shown in Figure 1, the end of tripping coil SOL links to each other with the live wire HOT of power input LINE; The other end links to each other with the anode of controllable silicon V4, the working power input of control chip IC1 (RV4145) by normally closed switch K1/ normal open switch K2, for controllable silicon V4 and control chip IC1 provide working power.And the end of the tripping coil SOL in the leakage current detection protection circuit shown in Figure 2 links to each other with the live wire HOT of power input LINE; The other end directly links to each other with the anode of controllable silicon V4, for it provides working power, simultaneously, the other end of tripping coil SOL also links to each other with the working power input 6 of control chip IC1 by normally closed switch K1/ normal open switch K2, and IC1 provides working power for control chip.
Fig. 3 is the utility model leakage current detection protection circuit embodiment 3 physical circuit figure.The difference of leakage current detection protection circuit shown in Figure 3 and Fig. 1, leakage current detection protection circuit shown in Figure 2 is: after the power input of leakage current detection protection circuit and the power line in the wall connect, need not to operate any parts, Fig. 1, leakage current detection protection circuit shown in Figure 2 produce the simulation leakage current automatically; And leakage current detection protection circuit shown in Figure 3 produces the low resistance fault current automatically.
As shown in Figure 3; the end of sense switch KR-1 in the leakage current detection protection circuit links to each other with the zero line of power input through current-limiting resistance R3, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil L2.
As shown in Figure 3; after the power line in leakage current detection protection circuit power input and the wall connects; need not to operate any parts; because sense switch KR-1 is a normally closed switch; the zero line of power input through current-limiting resistance R3, closed sense switch KR-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil L2; form the closed-loop path, produce the low resistance fault current automatically.
If leakage current detection protection circuit does not have end-of-life, what then be used to detect the low resistance fault detects this fault current from magnetic test coil L2, output signal to control chip IC1, the 5 pin output high level signal of control chip IC1, trigger controllable silicon V4, make controllable silicon V4 conducting, there is electric current to flow through in the tripping coil SOL, produce magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, make the mechanical device action in the supply socket, snap close is opened, the reset guide lock passes lockhole, waits for that reset button resets; Simultaneously, the mechanical device action in the supply socket disconnects sense switch KR-1, and the low resistance fault current disappears.Push reset button RESET this moment, the reset button success that resets, and leakage current detection protection circuit power output end LOAD has power supply output.
Otherwise, if the leakage current detection protection circuit end-of-life, then 5 pin of control chip IC1 are always low level, do not trigger controllable silicon V4, not conducting of controllable silicon V4, no current flows through in the tripping coil SOL, and no magnetic field produces in the tripping coil SOL, and the iron core that is built in the tripping coil SOL is failure to actuate, mechanical device in the supply socket is failure to actuate, snap close can't be opened, and reset button can't reset all the time, and leakage current detection protection circuit power output end LOAD does not have power supply output; Sense switch KR-1 is closed all the time, and simulation low resistance fault current does not disappear.
Fig. 4 is the utility model leakage current detection protection circuit embodiment 4 physical circuit figure.The difference of leakage current detection protection circuit shown in Figure 4 and Fig. 1, Fig. 2, leakage current detection protection circuit shown in Figure 3 is: after the power input of leakage current detection protection circuit and the power line in the wall connect, need not to operate any parts, Fig. 1, Fig. 2, leakage current detection protection circuit shown in Figure 3 produce simulation leakage current or low resistance fault current automatically; And leakage current detection protection circuit shown in Figure 4 must be pushed testing button TEST earlier, can produce the simulation leakage current, detects whether end-of-life of this leakage current detection protection circuit.
As shown in Figure 4, the sense switch KR-1 in this leakage current detection protection circuit is a normal open switch, links with testing button TEST.When testing button TEST is pressed, sense switch KR-1 closure, when testing button TEST was released, sense switch KR-1 disconnected.The end of sense switch KR-1 links to each other with the zero line of power input through current-limiting resistance R3, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2.
As shown in Figure 4, after the power line in leakage current detection protection circuit power input and the wall connects, push testing button TEST earlier, make the sense switch KR-1 closure of interlock with it.Because sense switch KR-1 closure, the zero line of power input through current-limiting resistance R3, closed sense switch KR-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2, form the closed-loop path, manually produce the simulation leakage current.
If leakage current detection protection circuit does not have end-of-life, the induction coil L1 that then is used to detect leakage current detects this leakage current, output signal to control chip IC1, the 5 pin output high level signal of control chip IC1, trigger controllable silicon V4, make controllable silicon V4 conducting, there is electric current to flow through in the tripping coil SOL, produce magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, make the mechanical device action in the supply socket, snap close is opened, the reset guide lock passes lockhole, waits for that reset button resets; Simultaneously, discharge testing button TEST, sense switch KR-1 is disconnected, the simulation leakage current disappears.Push reset button RESET this moment, the reset button success that resets, and leakage current detection protection circuit power output end LOAD has power supply output.
Otherwise; if the leakage current detection protection circuit end-of-life, then 5 pin of control chip IC1 are always low level, do not trigger controllable silicon V4; not conducting of controllable silicon V4; no current flows through in the tripping coil SOL, and no magnetic field produces in the tripping coil SOL, and the iron core that is built in the tripping coil SOL is failure to actuate; mechanical device in the supply socket is failure to actuate; snap close can't be opened, and reset button can't reset all the time, and leakage current detection protection circuit power output end LOAD does not have power supply output.
Fig. 4-1 is the utility model leakage current detection protection circuit embodiment 5 physical circuit figure.Leakage current detection protection circuit shown in Fig. 4-1 is identical with the operation principle of leakage current detection protection circuit shown in Figure 4: push testing button TEST earlier; manually produce the simulation leakage current; detect whether end-of-life of this leakage current detection protection circuit, its difference is: a normally closed switch KR-6 has connected in the manual simulation leakage current generating loop of leakage current detection protection circuit shown in Fig. 4-1.Promptly, the frequent make and break of the end of sense switch KR-1 is closed KR-6, current-limiting resistance R3 and is linked to each other with the zero line of power input, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2.
When pushing testing button TEST, after making the sense switch KR-1 closure of interlock with it, the zero line of power input is through current-limiting resistance R3, normally closed switch KR-6, closed sense switch KR-1 and pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire from magnetic test coil L2 that is used to detect the low resistance fault, form the closed-loop path, manually produce the simulation leakage current.After the simulation leakage current generating, the mechanical component action in the supply socket disconnects normally closed switch KR-6 immediately, and the simulation leakage current is disappeared.
The advantage of this design is: avoid owing to do not discharge testing button TEST for a long time, sense switch KR-1 does not disconnect, and the simulation leakage current does not disappear for a long time, and leakage current detection protection circuit is burnt out.
Fig. 5 is the utility model leakage current detection protection circuit embodiment 6 physical circuit figure.Leakage current detection protection circuit shown in Figure 5 is identical with the operation principle of leakage current detection protection circuit shown in Figure 4: push testing button TEST earlier, manually produce the simulation leakage current, detect whether end-of-life of this leakage current detection protection circuit, its difference is: the end of the tripping coil SOL in the leakage current detection protection circuit shown in Figure 4 links to each other with the live wire of power input, and the place of working pin of control chip IC1 links to each other with the zero line of power input respectively with the negative electrode of controllable silicon V4; And the end of the tripping coil SOL in the leakage current detection protection circuit shown in Figure 5 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2, the place of working pin of control chip IC1 and the negative electrode of controllable silicon V4 respectively with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil L2.
Fig. 5-1 is the utility model leakage current detection protection circuit embodiment 7 physical circuit figure.Leakage current detection protection circuit shown in Fig. 5-1 is identical with the operation principle of leakage current detection protection circuit shown in Fig. 4-1: push testing button TEST earlier, manually produce the simulation leakage current, detect whether end-of-life of this leakage current detection protection circuit; And; in simulation leakage current generating loop, be in series with a normally closed switch KR-6; behind manual generation simulation leakage current; normally closed switch KR-6 is disconnected; the simulation leakage current of manual generation is disappeared; avoid leakage current detection protection circuit to burn, prolong the useful life of leakage current detection protection circuit.
Its difference is: the end of the tripping coil SOL shown in Fig. 4-1 in the leakage current detection protection circuit links to each other with the live wire of power input, and the place of working pin of control chip IC1 links to each other with the zero line of power input respectively with the negative electrode of controllable silicon V4; And the end of the tripping coil SOL in the leakage current detection protection circuit shown in Fig. 5-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2, the place of working pin of control chip IC1 and the negative electrode of controllable silicon V4 respectively with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil L2.
Fig. 6 is the utility model leakage current detection protection circuit embodiment 8 physical circuit figure.Leakage current detection protection circuit shown in Figure 6 is identical with the operation principle of leakage current detection protection circuit shown in Figure 5: push testing button TEST earlier, manually produce the simulation leakage current, detect whether end-of-life of this leakage current detection protection circuit, its difference is: the end of the tripping coil SOL in the leakage current detection protection circuit shown in Figure 5 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2, the other end links to each other with the anode of controllable silicon V4 and the working power input 6 of control chip IC1 by K switch 1/K2, for controllable silicon V4 and control chip IC1 provide working power; And the end of the tripping coil SOL in the leakage current detection protection circuit shown in Figure 6 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil L2; the other end directly links to each other with the anode of controllable silicon V4; for it provides working power; simultaneously; the other end of tripping coil SOL links to each other with the working power input 6 of control chip IC1 by K switch 1/K2, and IC1 provides working power for control chip.
Fig. 7 is the utility model leakage current detection protection circuit embodiment 9 physical circuit figure.Leakage current detection protection circuit shown in Figure 7 is identical with the operation principle of Fig. 4, Fig. 4-1, Fig. 5, Fig. 5-1, leakage current detection protection circuit shown in Figure 6: all be to detect whether end-of-life of this leakage current detection protection circuit by manual mode; Its difference is: Fig. 4, Fig. 4-1, Fig. 5, Fig. 5-1, leakage current detection protection circuit shown in Figure 6 are to produce the simulation leakage current by manual mode; detect whether end-of-life of this this leakage current detection protection circuit; and; leakage current detection protection circuit shown in Figure 7 is by the controllable silicon in the manual triggers leakage current detection protection circuit; make the mode of leakage current detection protection circuit work, detect whether end-of-life of this leakage current detection protection circuit.
As shown in Figure 7, the end of sense switch KR-1 links to each other with the silicon controlled trigger electrode, and the other end links to each other with the working power input 6 of control chip IC1 by resistance R 6.This sense switch KR-1 and reset button RESET interlock, when reset button RESET is pressed, sense switch KR-1 closure, directly power supply triggers controllable silicon V4.
If leakage current detection protection circuit does not have end-of-life, then controllable silicon V4 conducting has electric current to flow through in the tripping coil SOL, produces magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, make the mechanical device action in the supply socket, snap close is opened, and sense switch disconnects simultaneously, the reset guide lock passes lockhole, discharge reset button, the reset button success that resets, leakage current detection protection circuit power output end LOAD has power supply output; Simultaneously, sense switch KR-1 disconnects, and controllable silicon V4 ends.
Otherwise; if leakage current detection protection circuit end-of-life; even then the trigger electrode of controllable silicon V4 directly is connected to high level with power supply, also not conducting of controllable silicon V4, the interior no current of tripping coil SOL flows through; no magnetic field produces in the tripping coil SOL; the iron core that is built in the tripping coil SOL is failure to actuate, and the mechanical device in the supply socket is failure to actuate, and snap close can't be opened; reset button can't reset all the time, and leakage current detection protection circuit power output end LOAD does not have power supply output.
In order to improve the useful life of leakage current detection protection circuit; avoid because the destruction that thunderbolt or the instantaneous pressure that causes of other reasons cause supply socket and coupled external equipment; as Fig. 5～shown in Figure 7; the disclosed leakage current detection protection circuit of the utility model is passing the induction coil L1 that is used to detect leakage current and is being used to detect tip that the power input live wire HOT and the zero line WHITE place from magnetic test coil L2 of low resistance fault be connected with one group of right-angled triangle that is used to discharge or isoceles triangle shape take shelter from the thunder sheet metal M1 and M2; most advanced and sophisticated lightning-arrest sheet metal M1 and M2 quite place, and the distance between two lightning-arrest sheet metal lower inside in tip is greater than the distance between its upper inner.
When the live wire of power output end and zero line because thunderbolt or other reasons when causing instantaneous pressure; the air dielectric that is connected to the lightning-arrest sheet metal in tip at output live wire place and is connected between the lightning-arrest sheet metal in tip at output zero line place is breakdown; form atmospherical discharges; most of high pressure consumes by lightning-arrest sheet metal; the residue sub-fraction consumes by tripping coil SOL, piezo-resistance MOV; thereby protected leakage current detection protection circuit/supply socket, and the safe operation of the miscellaneous equipment that links to each other with supply socket.
In order to show the operating state of leakage current detection protection circuit better; as shown in Figure 7; the utility model is parallel with indicator light V3 between power output end LOAD live wire and zero line, pass be used to detect the induction coil L1 of leakage current and be used to detect the low resistance fault between the power input live wire of magnetic test coil L2 and zero line, be parallel with indicator light V6.The color difference of indicator light V3, V6, the light that they send outputs to the supply socket surface by a light lead bar.After leakage current detection protection circuit powered on operate as normal, indicator light V3, V6 were bright, and two kinds of light mixing change the third color output into, so the user can judge the operating state of this leakage current detection protection circuit according to color.
In sum, because the utility model adopts above technical scheme, so the disclosed leakage current detection protection circuit of the utility model has following outstanding advantage:
(1) this leakage current detection protection circuit is in order to save the energy, to reduce electronic original part; utilize the know-why of halfwave rectifier V1, can reach life end checking function equally, and wiring is simpler; when detecting element and leakage current component wear, can stop reset button to reset automatically especially.
(2) after the power line in leakage current detection protection circuit power input and the wall connects, by automatically/or manual mode produce the simulation leakage current, detect whether end-of-life of leakage current detection protection circuit.
(3) has the destruction that anti-lightning strike and instantaneous pressure that other reasons causes causes supply socket and the miscellaneous equipment that links to each other with this supply socket.
The above is specific embodiment of the utility model and the know-why used, and is any based on the equivalent transformation on the technical solutions of the utility model basis, all belongs within the utility model protection range.
Claims (13)
1. leakage current detection protection circuit, it comprises the induction coil (L1) that is used to detect leakage current, be used to detect the low resistance fault from magnetic test coil (L2), control chip (IC1), the tripping coil (SOL) that is built-in with iron core, controllable silicon (V4); It is characterized in that:
This leakage current detection protection circuit also includes one and is used to detect the whether sense switch (KR-1) of end-of-life of this leakage current detection protection circuit.
2. leakage current detection protection circuit according to claim 1; it is characterized in that: an end of described sense switch (KR-1) links to each other with power input zero line/live wire through current-limiting resistance (R3), the other end with pass the described induction coil (L1) that is used to detect leakage current and link to each other with the power input live wire/zero line that is used to detect the low resistance fault from magnetic test coil (L2).
3. leakage current detection protection circuit according to claim 2 is characterized in that: described sense switch (KR-1) is a normally closed switch;
After the power line in leakage current detection protection circuit power input and the wall connects, automatically produce the simulation leakage current, detect whether end-of-life of this leakage current detection protection circuit automatically; Immediately, described sense switch (KR-1) disconnects, and the simulation leakage current disappears.
4. leakage current detection protection circuit according to claim 2 is characterized in that: described sense switch (KR-1) is a normal open switch, and this sense switch (KR-1) links with the testing button (TEST) of supply socket;
Push testing button (TEST), described sense switch (KR-1) closure manually produces the simulation leakage current, detects whether end-of-life of this leakage current detection protection circuit; Discharge testing button (TEST), described sense switch (KR-1) disconnects, and the simulation leakage current disappears.
5. leakage current detection protection circuit according to claim 4 is characterized in that: this leakage current detection protection circuit also comprises a normally closed switch (KR-6);
One end of described sense switch (KR-1) links to each other with power input zero line/live wire through described normally closed switch (KR-6), current-limiting resistance, the other end with pass the described induction coil (L1) that is used to detect leakage current and link to each other with the power input live wire/zero line that is used to detect the low resistance fault from magnetic test coil (L2);
Push testing button (TEST), described sense switch (KR-1) closure manually produces the simulation leakage current, detects whether end-of-life of this leakage current detection protection circuit; Immediately, described normally closed switch (KR-6) disconnects, and the simulation leakage current disappears; Discharge testing button (TEST), described sense switch (KR-1) disconnects.
6. leakage current detection protection circuit according to claim 1 is characterized in that: described sense switch (KR-1) is a normal open switch;
The interlock of this sense switch (KR-1) and reset button (RESET), when reset button (RESET) when being pressed, this sense switch (KR-1) closure, discharge reset button before, this sense switch disconnects already;
One end of this sense switch (KR-1) links to each other with described silicon controlled trigger electrode, and the other end links to each other with the working power input (6) of described control chip (IC1) by resistance;
After the power line in leakage current detection protection circuit power input and the wall connected, the manual triggers controllable silicon detected whether end-of-life of leakage current detection protection circuit.
7. leakage current detection protection circuit according to claim 1 is characterized in that: described sense switch (KR-1) is a normally closed switch;
One end of described sense switch (KR-1) links to each other with the power input zero line through current-limiting resistance (R3), the other end with pass the described induction coil (L1) that is used to detect leakage current and link to each other with the power input zero line that is used to detect the low resistance fault from magnetic test coil (L2);
After the power line in leakage current detection protection circuit power input and the wall connects, produce the low resistance fault current automatically, detect whether end-of-life of leakage current detection protection circuit.
8. according to the described leakage current detection protection circuit of one of claim 1-7, it is characterized in that: an end of described tripping coil (SOL) links to each other with the live wire of power input; The other end of tripping coil (SOL) links to each other with the anode of controllable silicon (V4), the working power input of control chip (IC1) with normal open switch (K2) by normally closed switch (K1), for controllable silicon (V4) and control chip (IC1) provide working power.
9. according to the described leakage current detection protection circuit of one of claim 1-7, it is characterized in that: an end of described tripping coil (SOL) links to each other with the live wire of power input; The other end directly links to each other with the anode of controllable silicon (V4), for it provides working power, the other end of tripping coil (SOL) links to each other with the working power input of normal open switch (K2) with control chip (IC1) by normally closed switch (K1), and (IC1) provides working power for control chip.
10. according to the described leakage current detection protection circuit of one of claim 1-7, it is characterized in that: an end of described tripping coil (SOL) with pass the induction coil (L1) that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil (L2); The other end of tripping coil (SOL) links to each other with the anode of controllable silicon (V4), the working power input of control chip (IC1) with normal open switch (K2) by normally closed switch (K1), for controllable silicon (V4) and control chip (IC1) provide working power.
11., it is characterized in that according to the described leakage current detection protection circuit of one of claim 1-7: an end of described tripping coil (SOL) with pass the induction coil (L1) that is used to detect leakage current and link to each other with the power input live wire that is used to detect the low resistance fault from magnetic test coil (L2); The other end directly links to each other with the anode of controllable silicon (V4), for it provides working power; The other end of tripping coil (SOL) links to each other with the working power input of normal open switch (K2) with control chip (IC1) by normally closed switch (K1), and (IC1) provides working power for control chip.
12. according to the described leakage current detection protection circuit of one of claim 1～11, it is characterized in that: this leakage current detection protection circuit also includes the lightning-arrest sheet metal (M1 and M2) in tip of one group of right-angled triangle that is used to discharge or isoceles triangle shape;
Described tip take shelter from the thunder sheet metal (M1 and M2) respectively with pass the induction coil (L1) that is used to detect leakage current and link to each other with zero line with the power input live wire that is used to detect the low resistance fault from magnetic test coil (L2);
The described tip sheet metal (M1 and M2) of taking shelter from the thunder is quite placed, and the distance between two lightning-arrest sheet metal lower inside in tip is greater than the distance between its upper inner.
13. leakage current detection protection circuit according to claim 12 is characterized in that: this leakage current detection protection circuit also includes two indicator lights;
Between power output end (LOAD) live wire and zero line, be parallel with described indicator light (V3), between the power input live wire of magnetic test coil (L2) and zero line, be parallel with another described indicator light (V6) what pass the induction coil (L1) that is used to detect leakage current and be used to detect the low resistance fault;
The color difference of described two indicator lights (V3, V6), the light that they send outputs to the supply socket surface by a light lead bar;
After leakage current detection protection circuit powered on operate as normal, described two indicator lights (V3, V6) were all bright, and two kinds of light mixing change the third color output into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202721670U CN201774224U (en) | 2009-11-19 | 2010-07-27 | Novel electric-leakage detection protection circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910222612 | 2009-11-19 | ||
| CN200910222612.4 | 2009-11-19 | ||
| CN2010202721670U CN201774224U (en) | 2009-11-19 | 2010-07-27 | Novel electric-leakage detection protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN201774224U true CN201774224U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202721670U Expired - Lifetime CN201774224U (en) | 2009-11-19 | 2010-07-27 | Novel electric-leakage detection protection circuit |
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| CN (1) | CN201774224U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340125A (en) * | 2010-07-27 | 2012-02-01 | 黄华道 | Novel leakage detection protection circuit |
| CN114784752A (en) * | 2022-06-17 | 2022-07-22 | 无锡市晶源微电子有限公司 | Leakage protection device and detection method thereof |
-
2010
- 2010-07-27 CN CN2010202721670U patent/CN201774224U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340125A (en) * | 2010-07-27 | 2012-02-01 | 黄华道 | Novel leakage detection protection circuit |
| CN102340125B (en) * | 2010-07-27 | 2014-11-05 | 黄华道 | Novel leakage detection protection circuit |
| CN114784752A (en) * | 2022-06-17 | 2022-07-22 | 无锡市晶源微电子有限公司 | Leakage protection device and detection method thereof |
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