CN101944716A

CN101944716A - Electricity leakage detection protective circuit

Info

Publication number: CN101944716A
Application number: CN2009101583783A
Authority: CN
Inventors: 黄华道
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-07-08
Filing date: 2009-07-08
Publication date: 2011-01-12
Anticipated expiration: 2029-07-08
Also published as: CN101944716B

Abstract

The invention discloses an electricity leakage detection protective circuit, at least comprising a power source switch, a tripping coil, controllable silicon, an induction coil and a self-detection coil, wherein, the power source switch is connected in series with a power supply main loop; the tripping coil is internally provided with an iron core; the induction coil is used for detecting the leakage current; and the self-detection coil is used for detecting the low-resistance fault. The electricity detection protective circuit is characterized by also comprising a circuit generating stimulated leakage current in manual operation. The circuit comprises at least one constant-closed stimulated leakage current generation switch used for generating the stimulated leakage current, and a first constant-open switch linked with a test button; after the power source input end of the electricity leakage detection protective circuit is connected with the power source line in the wall, the test button is pressed, the first constant-open switch which is linked with the test button closes to generate the stimulated current, the stimulated electricity leakage generated switch and the first constant open switch linked with the test button are switched off, thus a reset button resets; after the reset button trips, the stimulated electricity leakage generation switch transforms into a close state from a switch-off state.

Description

Leakage current detection protection circuit

Technical field

The present invention relates to a kind of circuit that is installed in attaching plug/supply socket with detection of electrical leakage, defencive function.

Background technology

Along with the continuous development of the attaching plug with creepage protection function/supply socket industry, people are to the function of attaching plug/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 attaching plug/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 invention provides a kind of new pattern creepage detection protective circuit in attaching plug/supply socket, long service life that is installed in.

Another object of the present invention provides a kind of to because the destruction that thunderbolt or the instantaneous pressure that causes of other reasons cause attaching plug/supply socket and the miscellaneous equipment that links to each other with attaching plug/supply socket has the leakage current detection protection circuit of protective effect.

For achieving the above object, the present invention is by the following technical solutions: a kind of leakage current detection protection circuit, which comprises at least the mains switch that is connected in the main circuit power supply, the tripping coil that is built-in with iron core, controllable silicon, be used to detect the induction coil of leakage current and be used to detect the low resistance fault from magnetic test coil; It is characterized in that:

This leakage current detection protection circuit comprises that also manually produces a simulation leakage current circuit;

Being somebody's turn to do manually, generation simulation leakage current circuit comprises that at least one is used to produce normally closed simulation leakage current generating switch and first normal open switch that links with testing button of simulation leakage current;

After the power input of leakage current detection protection circuit and the power line in the wall connect, push testing button earlier, the described first normal open switch closure that links with testing button, produce the simulation leakage current, described afterwards simulation leakage current generating switch, first normal open switch described and the testing button interlock disconnect, and reset button resets;

After reset button was threaded off, described simulation leakage current generating switch changed closure state into from off-state again.

One end of described simulation leakage current generating switch with pass the induction coil that is used to detect leakage current and link to each other with power firestreak or the zero line that are used to detect the low resistance fault from magnetic test coil; The other end links to each other with the zero line or the live wire of leakage current detection protection circuit power input through described first normal open switch, current-limiting resistance with the testing button interlock.

This leakage current detection protection circuit also comprises second normal open switch that links with testing button, and an end of this second normal open switch links to each other with the zero line of power input through current-limiting resistance, and the other end links to each other with the live wire of power output end;

When testing button is pressed, the described second normal open switch closure; Discharge testing button, described second normal open switch disconnects.

Description of drawings

Fig. 1 is leakage current detection protection circuit embodiment 1 physical circuit figure disclosed by the invention;

Fig. 2 is leakage current detection protection circuit embodiment 2 physical circuit figure disclosed by the invention;

Fig. 3 is leakage current detection protection circuit embodiment 3 physical circuit figure disclosed by the invention;

Fig. 4 is leakage current detection protection circuit embodiment 4 physical circuit figure disclosed by the invention;

Fig. 5 is leakage current detection protection circuit embodiment 5 physical circuit figure disclosed by the invention;

Fig. 6 is leakage current detection protection circuit embodiment 6 physical circuit figure disclosed by the invention;

Fig. 7 is leakage current detection protection circuit embodiment 7 physical circuit figure disclosed by the invention;

Fig. 8 is leakage current detection protection circuit embodiment 8 physical circuit figure disclosed by the invention;

Fig. 9 is leakage current detection protection circuit embodiment 9 physical circuit figure disclosed by the invention;

Figure 10 is leakage current detection protection circuit embodiment 10 physical circuit figure disclosed by the invention;

Figure 11 is leakage current detection protection circuit embodiment 11 physical circuit figure disclosed by the invention.

Embodiment

Fig. 1 for disclosed by the invention be installed in attaching plug/or supply socket in the 1 physical circuit figure of the leakage current detection protection circuit embodiment with detection of electrical leakage, defencive function.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), be built-in with iron core tripping coil L3 (SOL), controllable silicon V4, with simulation leakage current generating K switch R-5, the halfwave rectifier diode V1 of testing button TEST interlock, with mains switch KR-2-1, KR-2-2, the power supply output indicator V3 of attaching plug/supply socket reset button RESET interlock.

Live wire HOT, the zero line WHITE of leakage current detection protection circuit power input LINE (being the power input of attaching plug or supply socket) pass the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault behind magnetic test coil L2, link to each other with live wire HOT, the zero line WHITE of leakage current detection protection circuit power output end LOAD (being the power output end of attaching plug or supply socket) by mains switch KR-2-1, KR-2-2 with attaching plug/supply socket reset button RESET interlock.

As shown in Figure 1, this leakage current detection protection circuit comprises that also one produces simulation leakage current circuit automatically.Simulation leakage current circuit be should produce automatically and simulation leakage current generating K switch R-1, current-limiting resistance R4 comprised.The end of simulation leakage current generating K switch R-1 links to each other with the zero line or the live wire of leakage current detection protection circuit power input through current-limiting resistance R4, the other end through a normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with power firestreak HOT or the zero line WHITE that are used to detect the low resistance fault from magnetic test coil L2.Described simulation leakage current generating K switch R-1 is a normally closed switch.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1, normally closed switch K1 are in closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1, normally closed switch K1 with pass induction coil L1 (1000: 1) and link to each other with power firestreak HOT from magnetic test coil L2 (200: 1); form the closed-loop path; need not to operate any parts and can produce the simulation leakage current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 are exported high level, trigger controllable silicon V4 conducting, mechanical device action in supply socket/attaching plug, snap close is passed, the guiding lock of reset button below is in line with the lockhole of snap close end face, and reset button RESET resets; Otherwise, if the leakage current detection protection circuit end-of-life then stops reset button RESET to reset.

After the power input of leakage current detection protection circuit and the power line in the wall connected, simulation leakage current circuit produced moment after the simulation leakage current, and simulation leakage current generating K switch R-1 disconnects immediately, and the simulation leakage current disappears.

As shown in Figure 1, this leakage current detection protection circuit also comprises a normally closed switch K1 and a normal open switch K3.As shown in the figure, the end of tripping coil L3 links to each other with the anode of controllable silicon V4; The other end of tripping coil L3 by normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2, the other end of tripping coil L3 also links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD by a normal open switch K3.

Be used to detect the induction coil L1 of leakage current, the signal output part from magnetic test coil L2 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 leakage current detection protection circuit power output end LOAD by halfwave rectifier diode V1, resistance R 1, tripping coil L3, normal open switch K3; The working power input 6 of control chip IC1 is also by halfwave rectifier diode V1, resistance R 1, tripping coil L3, normally closed switch K1 and pass the induction coil L 1 that is used to detect leakage current and link to each other with the power firestreak HOT from magnetic test coil L2 that is used to detect the low resistance fault.

The anode of controllable silicon V4 links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD by tripping coil L3, normal open switch K3, the anode of controllable silicon V4 also by tripping coil L3, normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.The negative electrode of controllable silicon V4 links to each other with power ground.

The place of working of leakage current detection protection circuit as the ground pin 4 of the earth terminal that is used to detect the low resistance fault, control chip IC1 from magnetic test coil L2 (200: 1) with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1, normally closed switch K1 are in closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1, normally closed switch K1 with pass induction coil L1 (1000: 1) and link to each other with power firestreak HOT from magnetic test coil L2 (200: 1); form the closed-loop path, produce the simulation leakage current automatically.When leakage current detection protection circuit did not have end-of-life, 5 pin of control chip IC1 output high level triggered controllable silicon V4.

At this moment, because reset button RESET is in trip status, normally closed switch K1 is in closure state, be in off-state with mains switch KR-2-1, the KR-2-2 of reset button RESET interlock, the normally closed switch K1 of tripping coil L3 by closure with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The anode of controllable silicon V4 by tripping coil L3, closed normally closed switch K1 also with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The working power pin 6 of control chip IC 1 also by tripping coil L3, closed normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The charged work of leakage current detection protection circuit; controllable silicon V4 conducting; there is electric current to flow through in the tripping coil L3; tripping coil L3 produces magnetic field; make the iron core action that is built in the tripping coil L3, thereby make the mechanical device action in attaching plug/supply socket, snap close is passed, is opened; simulate leakage current generating K switch R-1 automatic disconnection simultaneously, the simulation leakage current disappears.

Push reset button, the reset guide lock of reset button below passes the lockhole of snap close end face, snap close reposition, the reset button RESET success that resets, with K switch R-2-1, the KR-2-2 closure of reset button RESET interlock, the leakage current detection protection circuit power output end has power supply output; Simultaneously; mechanical device action in attaching plug/supply socket; normally closed switch K1 is disconnected; normal open switch K3 closure; the working power pin 6 of tripping coil L3, controllable silicon anode and control chip IC1 all links to each other with the live wire of leakage current detection protection circuit power output end by normal open switch K3, the charged work of leakage current detection protection circuit.

If the leakage current detection protection circuit end-of-life, then not conducting of controllable silicon V4, tripping coil L3 no current flows through, and does not produce magnetic field in the tripping coil L3, and the iron core that is built in the tripping coil L3 is failure to actuate, and reset button RESET can't reset all the time.

If leakage current detection protection circuit does not have end-of-life; after reset button RESET resets; have at the leakage current detection protection circuit power output end under the situation of power supply output; leakage current detection protection circuit detects and has leaky or short-circuit conditions or low resistance fault in the power supply circuits; induction coil L1 or output signal to control chip IC1 then from magnetic test coil L2; the 5 pin output high level of control chip IC1; trigger controllable silicon V4 conducting; there is electric current to flow through in the tripping coil L3; tripping coil L3 produces magnetic field; make the iron core action that is built in the tripping coil L3; thereby make the mechanical device action in attaching plug/supply socket; reset button RESET is threaded off, with the mains switch KR-2-1 of reset button RESET interlock; KR-2-2 disconnects, the power supply output of the plug/leakage current detection protection circuit of cutting off the electricity supply.Simultaneously, simulation leakage current generating K switch R-1 and normally closed switch K1 change closure state into from off-state again, and moment after the simulation leakage current generating, simulation leakage current generating K switch R-1 changes off-state into from closure state again, the wait reset button resets, and repeats a process.

When reset button RESET was in trip status, above-mentioned normally closed switch K1 was in closure state, and the moment of simulation leakage current generating K switch R-1 closure changes off-state, waited for that reset button resets.When reset button RESET was in reset mode, above-mentioned normally closed switch K1 and simulation leakage current generating K switch R-1 were in off-state.When reset button RESET when reset mode changes trip status into, above-mentioned normally closed switch K1 transfers closure state to from off-state, simulation leakage current generating K switch R-1 changes closure state into from off-state, moment is changed off-state again into.

The present invention has also comprised a K switch R-5 who links with testing button TEST.The end of this K switch R-5 links to each other with the zero line WHITE of power input LINE by resistance R 4; The other end of K switch R-5 links to each other with the live wire HOT of power output end.Push testing button TEST; K switch R-5 closure; the live wire HOT of power output end links to each other with the zero line WHITE of power input through K switch R-5, the current-limiting resistance R4 of closure; 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 output of cutting off the electricity supply.Discharge testing button TEST, K switch R-5 disconnects, and the simulation leakage current disappears.

Fig. 2 is leakage current detection protection circuit embodiment 2 physical circuit figure disclosed by the invention.The operation principle of leakage current detection protection circuit shown in Figure 2 and leakage current detection protection circuit shown in Figure 1 is basic identical.After the power line in leakage current detection protection circuit power input and the wall connects, need not to operate any parts, can produce simulation low resistance fault current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, simulation leakage current generating K switch R-1 automatic disconnection, simulation low resistance fault current disappears, snap close is opened, the reset guide lock is in line with lockhole, press reset button and promote the snap close reposition simultaneously, the locked groove of reset guide lock is identical with lockhole, the reset button success that resets; If the leakage current detection protection circuit end-of-life, then leakage current detection protection circuit stops reset button to reset.

The induction coil L1 that tripping coil L3, controllable silicon, control chip IC1 and passing is used to detect leakage current links to each other with the power firestreak HOT from magnetic test coil L2 that is used to detect the low resistance fault.

As shown in Figure 2, this leakage current detection protection circuit comprises that one produces simulation low resistance failure current circuit automatically.Simulation low resistance failure current circuit be should produce automatically and simulation leakage current generating K switch R-1, normally closed switch K2, normal open switch K3, current-limiting resistance R4 comprised.The end of simulation leakage current generating K switch R-1 links to each other with the zero line of leakage current detection protection circuit power input through current-limiting resistance R4, the frequent make and break of other end pass K2 with pass the induction coil L1 (1000: 1) that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2 (200: 1); The other end of simulation leakage current generating K switch R-1 also by normal open switch K3 with pass the induction coil L1 (1000: 1) that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2 (200: 1).Described simulation leakage current generating K switch R-1 is a normally closed switch.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1, normally closed switch K2 are in closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1, normally closed switch K2 with pass induction coil L 1 (1000: 1) and link to each other with zero-power line WHITE from magnetic test coil L2 (200: 1); form the closed-loop path, produce simulation low resistance fault current automatically.When leakage current detection protection circuit did not have end-of-life, 5 pin of control chip IC 1 output high level triggered controllable silicon V4.

At this moment, because reset button RESET is in trip status, normally closed switch K2, simulation leakage current generating K switch R-1 all are in closure state, be in off-state with mains switch KR-2-1, the KR-2-2 of reset button RESET interlock, the working power pin 6 of tripping coil L3, controllable silicon V4, control chip IC1 all by tripping coil L3 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The charged work of leakage current detection protection circuit; controllable silicon V4 conducting; there is electric current to flow through in the tripping coil L3; tripping coil L3 produces magnetic field; make the iron core action that is built in the tripping coil L3, thereby make the mechanical device action in attaching plug/supply socket, snap close is passed, is opened; simulation leakage current generating K switch R-1 automatic disconnection, simulation low resistance fault current disappears.

Push reset button, reset guide lock passes the lockhole of snap close end face, snap close reposition simultaneously, the reset button RESET success that resets, with K switch R-2-1, the KR-2-2 closure of reset button RESET interlock, the leakage current detection protection circuit power output end has power supply output; Simultaneously, the mechanical device action in attaching plug/supply socket disconnects normally closed switch K2, with normal open switch K3 closure.

Fig. 3 is leakage current detection protection circuit embodiment 3 physical circuit figure disclosed by the invention.The operation principle of leakage current detection protection circuit shown in Figure 3 and leakage current detection protection circuit shown in Figure 1 is identical.After the power line in leakage current detection protection circuit power input and the wall connects, need not to operate any parts, can produce the simulation leakage current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, simulation leakage current generating K switch R-1 automatic disconnection, the simulation leakage current disappears, snap close is opened, the reset guide lock is in line with lockhole, press reset button and promote the snap close reposition simultaneously, the locked groove of reset guide lock is identical with lockhole, the reset button success that resets; If the leakage current detection protection circuit end-of-life, then leakage current detection protection circuit stops reset button to reset.

As shown in Figure 3, this leakage current detection protection circuit comprises that also one produces simulation leakage current circuit automatically.Simulation leakage current circuit be should produce automatically and simulation leakage current generating K switch R-1, current-limiting resistance R4 comprised.The end of simulation leakage current generating K switch R-1 links to each other with the zero line or the live wire of leakage current detection protection circuit power input through current-limiting resistance R4, the other end through a normally closed switch K1 with pass the induction coil L1 (1000: 1) that is used to detect leakage current and link to each other with power firestreak HOT or the zero line WHITE that are used to detect the low resistance fault from magnetic test coil L2 (200: 1).Described simulation leakage current generating K switch R-1 is a normally closed switch.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1 is a closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1, normally closed switch K1 with pass induction coil L 1 (1000: 1) and link to each other with power firestreak HOT from magnetic test coil L2 (200: 1); form the closed-loop path; need not to operate any parts and can produce the simulation leakage current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 are exported high level, trigger controllable silicon V4 conducting, mechanical device action in supply socket/attaching plug, make the reset button RESET success that resets, simultaneously, simulation leakage current generating K switch R-1 is disconnected, the simulation leakage current disappears; Otherwise, then stop reset button RESET to reset.

As shown in Figure 3, this leakage current detection protection circuit also comprises a normally closed switch K1 and a normal open switch K3.The end of tripping coil L3 links to each other with the anode of controllable silicon V4, the other end by normally closed switch K1 with pass the induction coil L1 (1000: 1) that is used to detect leakage current and link to each other with the power firestreak that is used to detect the low resistance fault from magnetic test coil L2 (200: 1), the other end of tripping coil L3 also by normal open switch K3 with pass the induction coil L1 (1000: 1) that is used to detect leakage current and link to each other with the power firestreak that is used to detect the low resistance fault from magnetic test coil L2 (200: 1).When reset button RESET is in trip status, tripping coil L3 by normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.When reset button RESET is in reset mode, normally closed switch K1 disconnects, normal open switch K3 closure, the normal open switch K3 of tripping coil L3 by closure with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.

Fig. 4 is leakage current detection protection circuit embodiment 4 physical circuit figure disclosed by the invention.The difference of leakage current detection protection circuit shown in Figure 4 and Fig. 1-leakage current detection protection circuit shown in Figure 3 is: leakage current detection protection circuit shown in Figure 4 manually produces the simulation leakage current, detects whether end-of-life of leakage current detection protection circuit.

As shown in Figure 4, the end of the simulation leakage current generating K switch R-1 in this leakage current detection protection circuit with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The other end links to each other with the zero line WHITE of power input LINE by normal open switch KR-6, the current-limiting resistance R4 with testing button TEST interlock, and the other end of simulation leakage current generating K switch R-1 also links to each other with the live wire of power output end by the normal open switch KR-5 with testing button TEST interlock.

When testing button TEST is pressed, normal open switch KR-5, KR-6 closure, passing the induction coil L 1 that is used to detect leakage current links to each other with the zero line WHITE of power input through normally closed simulation leakage current generating K switch R-1, closed normal open switch KR-6, current-limiting resistance R4 with the power firestreak HOT 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.Simultaneously; pass the induction coil L1 that is used to detect leakage current be used to detect the low resistance fault link to each other the charged work of leakage current detection protection circuit from the power firestreak HOT of magnetic test coil L2 through simulation leakage current generating K switch R-1, closed normal open switch KR-5 and the live wire output conduction sleeve of power output end.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 output high level triggers controllable silicon V4 conducting, has electric current to flow through in the tripping coil L3, produce magnetic field, be built in the iron core action in the tripping coil L3, make the mechanical device action in attaching plug/supply socket, pass snap close, snap close is opened, simulate leakage current generating K switch R-1 simultaneously and disconnect, the simulation leakage current disappears, and the reset guide lock of reset button below is in line with the lockhole of snap close end face; Discharge testing button TEST, normal open switch KR-5, KR-6 disconnect, and the simulation leakage current disappears; Press reset button, snap close reposition, the reset button success that resets.

If the leakage current detection protection circuit end-of-life, then not conducting of controllable silicon V4, no current flows through in the tripping coil L3; do not produce magnetic field; the iron core that is built in the tripping coil L3 is failure to actuate, and the snap close in attaching plug/supply socket can't be opened, and reset button can't reset all the time.

As shown in Figure 4, the end of tripping coil L3 links to each other with the anode of controllable silicon V4; The other end of tripping coil L3 links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD by normal open switch K3, the other end of tripping coil L3 also by normally closed simulation leakage current generating K switch R-1 with pass the induction coil L 1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.

After the power input of leakage current detection protection circuit and the power line in the wall connect, reset button RESET is in trip status, simulation leakage current generating K switch R-1 is in closure state, normal open switch K3, be in off-state with mains switch KR-2-1, the KR-2-2 of reset button RESET interlock, the simulation leakage current generating K switch R-1 of tripping coil L3 by closure with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The anode of controllable silicon V4 by tripping coil L3, closed simulation leakage current generating K switch R-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The working power pin 6 of control chip IC1 also by tripping coil L3, closed simulation leakage current generating K switch R-1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The charged work of leakage current detection protection circuit.

When reset button RESET is in reset mode, simulation leakage current generating K switch R-1 is in off-state, normal open switch K3, be in closure state with mains switch KR-2-1, the KR-2-2 of reset button RESET interlock, tripping coil L3 links to each other with the live wire HOT of leakage current detection protection circuit power output end; The anode of controllable silicon V4 links to each other with the live wire HOT of leakage current detection protection circuit power output end by tripping coil L3; The working power pin 6 of control chip IC1 also links to each other with the live wire HOT of leakage current detection protection circuit power output end by tripping coil L3; The charged work of leakage current detection protection circuit.

Fig. 5 is the leakage current detection protection circuit embodiment 5 physical circuit figure with detection of electrical leakage, defencive function disclosed by the invention.As shown in Figure 5; this leakage current detection protection circuit is installed in the supply socket with two groups of power output ends; one group of single-phase three-wire power supply output plughole that power output end is the supply socket surface wherein, but one group of screw-type power output end that power output end is a supply socket both sides circumscripted power line.

As shown in Figure 5, 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), be built-in with iron core tripping coil L3 (SOL), controllable silicon V4, with simulation leakage current generating K switch R-5, the halfwave rectifier diode V1 of testing button TEST interlock, with mains switch KR-2-1, KR-2-2, KR-3-1, KR-3-2, power supply output indicator V3, the V6 of supply socket reset button RESET interlock.

The live wire HOT of leakage current detection protection circuit power input LINE, zero line WHITE pass the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault behind magnetic test coil L2, by linking to each other with live wire, zero line output conduction sleeve in the single-phase three-wire power supply output plughole on mains switch KR-2-1, the KR-2-2 of supply socket reset button RESET interlock and supply socket surface; Simultaneously, the live wire in the single-phase three-wire power supply output plughole on supply socket surface, zero line output conduction sleeve link to each other with live wire HOT, the zero line WHITE of supply socket power output end (load end) LOAD by K switch R-3-1, the KR-3-2 of another group with reset button RESET interlock again.

As shown in Figure 5, this leakage current detection protection circuit comprises that also one produces simulation leakage current circuit automatically.Simulation leakage current circuit be should produce automatically and simulation leakage current generating K switch R-1, current-limiting resistance R4 comprised.The end of simulation leakage current generating K switch R-1 links to each other with the zero line or the live wire of leakage current detection protection circuit power input through current-limiting resistance R4, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with power firestreak HOT or the zero line WHITE that are used to detect the low resistance fault from magnetic test coil L2.Described simulation leakage current generating K switch R-1 is a normally closed switch.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1 is a normally closed switch; be in closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1 with pass induction coil L1 (1000: 1) and link to each other with power firestreak HOT from magnetic test coil L2 (200: 1); form the closed-loop path; need not to operate any parts and can produce the simulation leakage current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 are exported high level, trigger controllable silicon V4 conducting, mechanical device action in the supply socket, snap close is passed, opened, the reset guide lock of reset button below is in line with the lockhole of snap close end face, pushes reset button RESET, and reset button resets; Otherwise, then stop reset button RESET to reset.

As shown in Figure 5, this leakage current detection protection circuit also comprises a normally closed switch K1.As shown in the figure, the end of tripping coil L3 links to each other with the anode of controllable silicon V4; The other end of tripping coil L3 links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD, the other end of tripping coil L3 also by normally closed switch K1 with pass the induction coil L 1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.

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 IC 1 links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD by halfwave rectifier diode V1, resistance R 1, tripping coil L3; The working power input 6 of control chip IC 1 is also by halfwave rectifier diode V1, resistance R 1, tripping coil L3, normally closed switch K1 and pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT from magnetic test coil L2 that is used to detect the low resistance fault.

The anode of controllable silicon V4 links to each other with the live wire HOT of leakage current detection protection circuit power output end LOAD by tripping coil L3, the anode of controllable silicon V4 also by tripping coil L3, normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.The negative electrode of controllable silicon V4 links to each other with power ground.

The place of working of leakage current detection protection circuit as the ground pin 4 of the earth terminal that is used to detect the low resistance fault, control chip IC1 from magnetic test coil L2 with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.

After the power input of leakage current detection protection circuit and the power line in the wall connect; because simulation leakage current generating K switch R-1 is a normally closed switch; be in closure state; the zero line WHITE of power input LINE through current-limiting resistance R4, closed simulation leakage current generating K switch R-1 with pass induction coil L1 (1000: 1) and link to each other with power firestreak HOT from magnetic test coil L2 (200: 1); form the closed-loop path, produce the simulation leakage current automatically.When leakage current detection protection circuit did not have end-of-life, 5 pin of control chip IC1 output high level triggered controllable silicon V4.

At this moment, because reset button RESET is in trip status, normally closed switch K1 is in closure state, be in off-state with mains switch KR-2-1, the KR-2-2 of reset button RESET interlock, the normally closed switch K1 of tripping coil L3 by closure with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The anode of controllable silicon V4 by tripping coil L3, closed normally closed switch K1 also with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The working power pin 6 of control chip IC1 also by tripping coil L3, closed normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The charged work of leakage current detection protection circuit; controllable silicon V4 conducting; have electric current to flow through in the tripping coil L3, tripping coil L3 produces magnetic field, makes the iron core action that is built in the tripping coil L3; thereby make the mechanical device action in attaching plug/supply socket; snap close is passed, is opened, and normally closed switch K1 disconnects, and simulation leakage current generating K switch R-1 disconnects; the simulation leakage current disappears, and the reset guide lock is in line with the lockhole of snap close end face.

Push reset button, reset guide lock passes the lockhole of snap close end face, snap close reposition simultaneously, the reset button RESET success that resets, with K switch R-2-1, KR-2-2, KR-3-1, the KR-3-2 closure of reset button RESET interlock, the leakage current detection protection circuit power output end has power supply output; The working power pin 6 of tripping coil L3, controllable silicon anode and control chip IC 1 all links to each other with the live wire of leakage current detection protection circuit power output end.

If leakage current detection protection circuit does not have end-of-life; after reset button RESET resets; have at the leakage current detection protection circuit power output end under the situation of power supply output; leakage current detection protection circuit detects and has leaky or short-circuit conditions or low resistance fault in the power supply circuits; induction coil L1 or output signal to control chip IC1 then from magnetic test coil L2; the 5 pin output high level of control chip IC1; trigger controllable silicon V4 conducting; there is electric current to flow through in the tripping coil L3; tripping coil L3 produces magnetic field; make the iron core action that is built in the tripping coil L3; thereby make the mechanical device action in attaching plug/supply socket; reset button RESET is threaded off, with the mains switch KR-2-1 of reset button RESET interlock; KR-2-2 disconnects, the power supply output of the plug/leakage current detection protection circuit of cutting off the electricity supply.Simultaneously, simulation leakage current generating K switch R-1 and normally closed switch K1 change closure state into from off-state again, and simulation leakage current generating moment, simulation leakage current generating K switch R-1 changes off-state into from closure state again, the wait reset button resets, and repeats a process.

Fig. 6 is leakage current detection protection circuit embodiment 6 physical circuit figure disclosed by the invention.The operation principle of leakage current detection protection circuit shown in Figure 6 and leakage current detection protection circuit shown in Figure 5 is identical.After the power line in leakage current detection protection circuit power input and the wall connects, need not to operate any parts, can produce the simulation leakage current automatically, detect whether end-of-life of leakage current detection protection circuit.If leakage current detection protection circuit does not have end-of-life, simulation leakage current generating K switch R-1 automatic disconnection, the simulation leakage current disappears, snap close is opened, the reset guide lock is in line with lockhole, press reset button and promote the snap close reposition simultaneously, the locked groove of reset guide lock is identical with lockhole, the reset button success that resets; If the leakage current detection protection circuit end-of-life, then leakage current detection protection circuit stops reset button to reset.

When reset button is in trip status, tripping coil L3, controllable silicon, control chip IC1 by a normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; When reset button is in reset mode, normally closed switch K1 disconnects, tripping coil L3, controllable silicon, control chip IC1 and pass and be used to detect the induction coil L1 of leakage current and be used to detect disconnecting of low resistance fault from the power firestreak HOT of magnetic test coil L2, and link to each other with the live wire of power output end.

The difference of leakage current detection protection circuit shown in Figure 6 and leakage current detection protection circuit shown in Figure 5 is: leakage current detection protection circuit shown in Figure 6 also comprises a normally closed switch K2.The place of working of leakage current detection protection circuit links to each other with the zero line output conduction sleeve of supply socket surface power supply output plughole as the earth terminal from magnetic test coil L2 that is used for detecting the low resistance fault, the ground pin 4 of control chip IC1; Simultaneously, also by aforementioned normally closed switch K2 with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.

When reset button RESET is in trip status; normally closed switch K2 is in closure state, the place of working of leakage current detection protection circuit with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.When reset button RESET was in reset mode, normally closed switch K2 disconnected, and the place of working of leakage current detection protection circuit is exported the conduction sleeve with the zero line in the power supply output plughole of supply socket surface and linked to each other.

Fig. 7 is leakage current detection protection circuit embodiment 7 physical circuit figure disclosed by the invention.This leakage current detection protection circuit comprises 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); be built-in with the tripping coil L3 (SOL) of iron core; controllable silicon V4; simulation leakage current generating K switch R-5 with testing button TEST interlock; halfwave rectifier diode V1; mains switch KR-2-1 with supply socket reset button RESET interlock; KR-2-2; KR-3-1; KR-3-2; power supply output indicator V3; V6.

This leakage current detection protection circuit comprises a simulation leakage current generating K switch R-1.The end of simulation leakage current generating K switch R-1 links to each other with the zero line or the live wire of leakage current detection protection circuit power input through current-limiting resistance R4, the other end with pass the induction coil L1 that is used to detect leakage current and link to each other with power firestreak HOT or the zero line WHITE that are used to detect the low resistance fault from magnetic test coil L2.Described simulation leakage current generating K switch R-1 is a normally closed switch.

Leakage current detection protection circuit also comprises a normally closed switch K2 as shown in Figure 7, and the place of working of leakage current detection protection circuit links to each other with the zero line output conduction sleeve of supply socket surface power supply output plughole as the earth terminal from magnetic test coil L2 that is used for detecting the low resistance fault, the ground pin 4 of control chip IC1; Simultaneously, also by aforementioned normally closed switch K2 with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.

When reset button RESET is in trip status; normally closed switch K2 among Fig. 7 is in closure state, the place of working of leakage current detection protection circuit with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2.When reset button RESET was in reset mode, normally closed switch K2 disconnected, and the place of working of leakage current detection protection circuit is exported the conduction sleeve with the zero line in the power supply output plughole of supply socket surface and linked to each other.

Fig. 8 is leakage current detection protection circuit embodiment 8 physical circuit figure disclosed by the invention.The difference of leakage current detection protection circuit shown in Figure 8 and Fig. 5-leakage current detection protection circuit shown in Figure 7 is: leakage current detection protection circuit shown in Figure 8 manually produces the simulation leakage current, detects whether end-of-life of leakage current detection protection circuit.

As shown in Figure 8, the end of the simulation leakage current generating K switch R-1 in this leakage current detection protection circuit with pass the induction coil L 1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2; The other end links to each other with the zero line WHITE of power input LINE by normal open switch KR-6, the current-limiting resistance R4 with testing button TEST interlock, and the other end of simulation leakage current generating K switch R-1 is also by linking to each other with power output end power firestreak output conduction sleeve with the normal open switch KR-5 of testing button TEST interlock.

When testing button TEST is pressed, normal open switch KR-5, KR-6 closure, passing the induction coil L1 that is used to detect leakage current links to each other with the zero line WHITE of power input through normally closed simulation leakage current generating K switch R-1, closed normal open switch KR-6, current-limiting resistance R4 with the power firestreak HOT from magnetic test coil L2 that is used to detect the low resistance fault, form the closed-loop path, produce the simulation leakage current.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 output high level triggers controllable silicon V4 conducting, has electric current to flow through in the tripping coil L3, produce magnetic field, be built in the iron core action in the tripping coil L3, make the mechanical device action in attaching plug/supply socket, pass snap close, snap close is opened, simulate leakage current generating K switch R-1 simultaneously and be disconnected, the simulation leakage current disappears, and the reset guide lock of reset button below is in line with the lockhole of snap close end face; Discharge testing button TEST, normal open switch KR-5, KR-6 disconnect, and the simulation leakage current disappears; Press reset button, snap close is released reposition, the reset button success that resets.

Fig. 9 is leakage current detection protection circuit embodiment 9 physical circuit figure disclosed by the invention.Leakage current detection protection circuit shown in Figure 9 is with the difference of leakage current detection protection circuit shown in Figure 8: the end of the simulation leakage current generating K switch R-1 in the leakage current detection protection circuit shown in Figure 8 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2, the other end links to each other with the zero line WHITE of power input LINE by normal open switch KR-6, the current-limiting resistance R4 with testing button TEST interlock.And; the end of simulation leakage current generating K switch R-1 in the leakage current detection protection circuit shown in Figure 9 with pass the induction coil L1 that is used to detect leakage current and link to each other with the zero-power line WHITE that is used to detect the low resistance fault from magnetic test coil L2, the other end links to each other with the live wire HOT of power input LINE by normal open switch KR-6, the current-limiting resistance R4 with testing button TEST interlock.The other end of simulation leakage current generating K switch R-1 also links to each other with power output end zero line output conduction sleeve by K switch R-5.

The place of working of leakage current detection protection circuit shown in Figure 9 links to each other with the zero line output conduction sleeve of supply socket surface power supply output plughole as the earth terminal from magnetic test coil L2 that is used for detecting the low resistance fault, the ground pin 4 of control chip IC1.

As shown in Figure 9, this leakage current detection protection circuit also comprises a normally closed switch K1.As shown in the figure, the end of tripping coil L3 links to each other with the anode of controllable silicon V4; The other end of tripping coil L3 and supply socket power firestreak output conduction sleeve links to each other, the other end of tripping coil L3 also by normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.

When reset button RESET is in trip status, normally closed switch K1 closure, tripping coil L3 by normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.When reset button RESET was in reset mode, normally closed switch K1 disconnected, and tripping coil L3 links to each other with supply socket live wire output conduction sleeve.

Figure 10 is leakage current detection protection circuit embodiment 10 physical circuit figure disclosed by the invention.As shown in figure 10, the end of the simulation leakage current generating K switch R-1 in this leakage current detection protection circuit links to each other with the zero line of power input through current-limiting resistance R4; The other end by with the normal open switch KR-6 of testing button TEST interlock with pass the power firestreak HOT that is used to detect the induction coil L1 of leakage current and is used to detect the low resistance fault and link to each other from magnetic test coil L2, the other end of simulation leakage current generating K switch R-1 also conducts electricity sleeve and links to each other by exporting with the normal open switch KR-5 of testing button TEST interlock and power output end power firestreak.

When testing button TEST is pressed, normal open switch KR-6 and KR-5 are closed simultaneously, passing the induction coil L1 that is used to detect leakage current links to each other with the zero line WHITE of power input through the normal open switch KR-6 of closure, closed simulation leakage current generating K switch R-1, current-limiting resistance R4 with the power firestreak HOT from magnetic test coil L2 that is used to detect the low resistance fault, form the closed-loop path, produce the simulation leakage current.Simultaneously; pass the induction coil L1 that is used to detect leakage current and link to each other the charged work of leakage current detection protection circuit through normal open switch KR-6, the KR-5 of closure with the live wire output conduction sleeve of power output end with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.If leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 output high level triggers controllable silicon V4 conducting, has electric current to flow through in the tripping coil L3, produce magnetic field, be built in the iron core action in the tripping coil L3, make the mechanical device action in attaching plug/supply socket, pass snap close, snap close is opened, the reset guide lock of reset button below is in line with the lockhole of snap close end face, simulation leakage current generating K switch R-1 automatic disconnection already, and the simulation leakage current disappears; Discharge testing button TEST, normal open switch KR-6 and KR-5 disconnect simultaneously, and the simulation leakage current disappears; Press reset button, reset button resets, and promotes normally closed switch KR-1 simultaneously and changes again in off-state and turn to closure state.

Figure 11 is leakage current detection protection circuit embodiment 11 physical circuit figure disclosed by the invention.And the operation principle of leakage current detection protection circuit shown in Figure 11 and Fig. 9 leakage current detection protection circuit is identical, and difference is: power output end contact connected mode difference.

Figure 11 is leakage current detection protection circuit embodiment 11 physical circuit figure disclosed by the invention.As shown in figure 11, the end of the simulation leakage current generating K switch R-1 in this leakage current detection protection circuit links to each other with the live wire of power input through current-limiting resistance R4; The other end by with the normal open switch KR-6 of testing button TEST interlock with pass the zero-power line WHITE that is used to detect the induction coil L1 of leakage current and is used to detect the low resistance fault and link to each other from magnetic test coil L2, the other end of simulation leakage current generating K switch R-1 also conducts electricity sleeve and links to each other by exporting with the normal open switch KR-5 of testing button TEST interlock and power output end zero-power line.

When testing button TEST is pressed, normal open switch KR-6 and KR-5 are closed simultaneously, passing the induction coil L1 that is used to detect leakage current links to each other with the live wire HOT of power input through the normal open switch KR-6 of closure, closed simulation leakage current generating K switch R-1, current-limiting resistance R4 with the zero-power line WHITE from magnetic test coil L2 that is used to detect the low resistance fault, form the closed-loop path, produce the simulation leakage current.Simultaneously, electric current links to each other with power output end conduction sleeve through the K switch R-5 of closure, the charged work of leakage current detection protection circuit, if leakage current detection protection circuit does not have end-of-life, then 5 pin of control chip IC1 are exported high level, trigger controllable silicon V4 conducting, there is electric current to flow through in the tripping coil L3, produces magnetic field, be built in the iron core action in the tripping coil L3, make the mechanical device action in attaching plug/supply socket, pass snap close, snap close is opened, the reset guide lock of reset button below is in line with the lockhole of snap close end face, the automatic disconnection of simulation leakage current generating K switch R-1 elder generation, the simulation leakage current disappears; Discharge testing button TEST, normal open switch KR-6 and KR-5 disconnect simultaneously, and the simulation leakage current disappears; Press reset button, the reset button success that resets.Simultaneously, promoting normally closed switch KR-1 changes again from off-state and turns to closure state.

As shown in figure 11, this leakage current detection protection circuit also comprises a normally closed switch K1.As shown in the figure, the end of tripping coil L3 links to each other with the anode of controllable silicon V4; The other end of tripping coil L3 and supply socket live wire output conduction sleeve links to each other, the other end of tripping coil L3 also by normally closed switch K1 with pass the induction coil L1 that is used to detect leakage current and link to each other with the power firestreak HOT that is used to detect the low resistance fault from magnetic test coil L2.

For leakage current detection protection circuit is worked reliably, as Fig. 1-shown in Figure 11, the present invention is connected with an anti-interference capacitor C 5 between controllable silicon trigger electrode and ground.Through anti-interference capacitor C 5 filtering that being attempted by between controllable silicon trigger electrode and the ground from the control signal that 5 pin of control chip IC1 are exported, suppress the generation of false triggering.

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 attaching plug/supply socket and the external equipment that links to each other with them; as Fig. 1-shown in Figure 11; lightning-arrest sheet metal M1 in the tip that leakage current detection protection circuit disclosed by the invention is connected with one group of right-angled triangle that is used to discharge or isoceles triangle shape at live wire HOT and the zero line WHITE place of power output end LOAD 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.

As Fig. 5-shown in Figure 11; leakage current detection protection circuit disclosed by the invention is also exported lightning-arrest sheet metal M3 in tip and the M4 that conduction sleeve place is connected with one group of right-angled triangle that is used to discharge or isoceles triangle shape at supply socket live wire output conduction sleeve and zero line; most advanced and sophisticated lightning-arrest sheet metal M3 and M4 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 L3, piezo-resistance MOV; thereby protected leakage current detection protection circuit/attaching plug, and the safe operation of the miscellaneous equipment that links to each other with attaching plug.

In sum, because the present invention adopts above technical scheme, so leakage current detection protection circuit disclosed by the invention has following outstanding advantage:

1, detects earlier automatically or manually detects whether end-of-life of leakage current detection protection circuit.The reseting procedure of reset button is informed whether all normal or end-of-lifes of this leakage current detection protection circuit of user; reset button resets, and all are normal for success explanation leakage current detection protection circuit, the reset button explanation leakage current detection protection circuit end-of-life that is prevented from resetting.

2, the work of this leakage current detection protection circuit or do not work; normally closed switch K1, K2, KR-1 move and closure/disconnection with reset button or testing button; in tripping operation with reset in a flash that tripping coil L3 does not have electric current to flow through; not conducting of controllable silicon; avoid the damage that big electric current causes of controllable silicon contact impact, such technology has improved the life-span of electronic component greatly.

The above is specific embodiments of the invention and the know-why used, and is any based on the equivalent transformation on the technical solution of the present invention basis, all belongs within the protection range of the present invention.

Claims

1. leakage current detection protection circuit, which comprises at least the mains switch (KR-2-1, KR-2-2), the tripping coil, the controllable silicon that are built-in with iron core that are connected in the main circuit power supply, be used to detect the induction coil (L1) of leakage current and be used to detect the low resistance fault from magnetic test coil (L2); It is characterized in that:

Being somebody's turn to do manually, generation simulation leakage current circuit comprises that at least one is used to produce normally closed simulation leakage current generating switch (KR-1) and first normal open switch (KR-6) that links with testing button (TEST) of simulation leakage current;

After the power input of leakage current detection protection circuit and the power line in the wall connect, push testing button earlier, described first normal open switch (KR-6) closure that links with testing button (TEST), produce the simulation leakage current, described afterwards simulation leakage current generating switch (KR-1), first normal open switch (KR-6) described and testing button (TEST) interlock disconnect, and reset button resets;

After reset button was threaded off, described simulation leakage current generating switch (KR-1) changed closure state into from off-state again.

2. leakage current detection protection circuit according to claim 1 is characterized in that: an end of described simulation leakage current generating switch (KR-1) with pass the induction coil (L1) that is used to detect leakage current and link to each other with power firestreak or the zero line that are used to detect the low resistance fault from magnetic test coil (L2); The other end links to each other with the zero line or the live wire of leakage current detection protection circuit power input through described first normal open switch (KR-6), current-limiting resistance (R4) with testing button (TEST) interlock.

3. leakage current detection protection circuit according to claim 1 and 2 is characterized in that:

This leakage current detection protection circuit also comprises second normal open switch (KR-5) that links with testing button (TEST), one end of this second normal open switch (KR-5) links to each other with the zero line of power input through current-limiting resistance (R4), and the other end links to each other with the live wire of power output end;

When testing button (TEST) when being pressed, described second normal open switch (KR-5) closure; Discharge testing button (TEST), described second normal open switch (KR-5) disconnects.

4. leakage current detection protection circuit according to claim 3, it is characterized in that: an end of described simulation leakage current generating switch (KR-1) with pass induction coil (L1) that is used to detect leakage current and the power firestreak that is used to detect the low resistance fault (HOT) and link to each other from magnetic test coil (L2), the other end links to each other with the zero line of leakage current detection protection circuit power input through described first normal open switch (KR-6), current-limiting resistance (R4) with testing button (TEST) interlock; The other end of described simulation leakage current generating switch (KR-1) also links to each other with the live wire of power output end by described second normal open switch (KR-5) with testing button (TEST) interlock;

After the power input of leakage current detection protection circuit and the power line in the wall connect, push testing button (TEST) earlier, after producing the simulation leakage current, discharge testing button, described simulation leakage current generating switch (KR-1) and first, second normal open switch (KR-5, KR-6) disconnect, and reset button resets;

After reset button was threaded off, described simulation leakage current generating switch (KR-1) changed closure state into from off-state.

5. according to the described leakage current detection protection circuit in one of claim 1 or 2; it is characterized in that: a described end that is built-in with the tripping coil of iron core links to each other with described silicon controlled anode, the other end with pass the induction coil (L1) that is used to detect leakage current and link to each other with the power firestreak that is used to detect the low resistance fault from magnetic test coil (L2).

6. according to the described leakage current detection protection circuit in one of claim 1 or 2, it is characterized in that: a described end that is built-in with the tripping coil of iron core links to each other with described silicon controlled anode, and the other end links to each other with the live wire of leakage current detection protection circuit power output end.

7. according to the described leakage current detection protection circuit in one of claim 1 or 2, it is characterized in that: this leakage current detection protection circuit comprises a normally closed switch (K1) that links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current at least;

When reset button is in trip status, described normally closed switch (K1) closure;

After reset button resetted, described normally closed switch (K1) disconnected.

8. leakage current detection protection circuit according to claim 7 is characterized in that: an end of described tripping coil (L3) links to each other with the anode of controllable silicon (V4); The other end of tripping coil (L3) links to each other with the live wire of leakage current detection protection circuit power output end (LOAD), and the other end of tripping coil (L3) also links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current by described normally closed switch (K1);

When reset button was in trip status, described tripping coil (L3) linked to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current;

After reset button resetted, the other end of described tripping coil (L3) linked to each other with the live wire of leakage current detection protection circuit power output end (LOAD).

9. leakage current detection protection circuit according to claim 7 is characterized in that:

This leakage current detection protection circuit also comprises a normal open switch (K3);

One end of described tripping coil (L3) links to each other with the anode of controllable silicon (V4); The other end of tripping coil (L3) links to each other with the live wire of leakage current detection protection circuit power output end through described normal open switch (K3), and the other end of tripping coil (L3) also links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current by described normally closed switch (K1);

After reset button resets, described normal open switch (K3) closure, the other end of described tripping coil (L3) links to each other with the live wire of leakage current detection protection circuit power output end.

10. leakage current detection protection circuit according to claim 1 and 2 is characterized in that:

One end of described tripping coil (L3) links to each other with the anode of controllable silicon (V4); The other end of tripping coil (L3) links to each other with the live wire of leakage current detection protection circuit power output end through described normal open switch (K3), and the other end of tripping coil (L3) also links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current by described simulation leakage current generating switch (KR-1);

After reset button resets, described normal open switch (K3) closure, described simulation leakage current generating switch (KR-1) disconnects, and the other end of described tripping coil (L3) links to each other with the live wire of leakage current detection protection circuit power output end.

11., it is characterized in that according to claim 1 or 27 described leakage current detection protection circuits:

One end of described tripping coil (L3) links to each other with the anode of controllable silicon (V4); The other end of tripping coil (L3) links to each other through described normal open switch (K3), described normally closed switch (K1) and the power firestreak that passes the induction coil (L1) that is used to detect leakage current;

When reset button was in trip status, described normal open switch (K3) disconnected, described normally closed switch (K1) closure, and the other end of described tripping coil (L3) links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current;

After reset button resetted, described normal open switch (K3) was closed, described normally closed switch (K1) disconnects, and the other end of described tripping coil (L3) links to each other with the power firestreak that passes the induction coil (L1) that is used to detect leakage current.

12. leakage current detection protection circuit according to claim 1 and 2 is characterized in that: the place of working of this leakage current detection protection circuit with pass the induction coil that is used to detect leakage current (L11000: 1) be used to detect the low resistance fault (L2200: zero-power line 1) links to each other from magnetic test coil.

13. leakage current detection protection circuit according to claim 1 and 2 is characterized in that: the place of working of this leakage current detection protection circuit links to each other through the zero line of lead with power output end (LOAD).

14. leakage current detection protection circuit according to claim 1 and 2 is characterized in that: this leakage current detection protection circuit comprises a normally closed switch (K2) that links to each other with the zero-power line WHITE that passes the induction coil (L1) that is used to detect leakage current at least;

When reset button is in trip status, described normally closed switch (K2) closure;

After reset button resetted, described normally closed switch (K2) disconnected.

15. leakage current detection protection circuit according to claim 14 is characterized in that: the place of working of this leakage current detection protection circuit links to each other with the zero line E of leakage current detection protection circuit power output end; Simultaneously, the place of working of leakage current detection protection circuit also by described normally closed switch (K2) with pass the induction coil (L1) that is used to detect leakage current and link to each other with the zero-power line that is used to detect the low resistance fault from magnetic test coil (L2);

When reset button is in trip status, the place of working of leakage current detection protection circuit by described normally closed switch (K2) with pass the induction coil (L1) that is used to detect leakage current and link to each other with the zero-power line that is used to detect the low resistance fault from magnetic test coil (L2);

When reset button was in reset mode, described normally closed switch (K2) disconnected, and the place of working of leakage current detection protection circuit links to each other with the zero line of leakage current detection protection circuit power output end.

16. according to the described leakage current detection protection circuit of one of claim 1-15, it is characterized in that: this leakage current detection protection circuit also comprises the lightning-arrest sheet metal (M1 and M2) in the tip that has one group of right-angled triangle that is used to discharge or isoceles triangle shape at least;

The described tip sheet metal (M1 and M2) of taking shelter from the thunder links to each other with zero line with the live wire of leakage current detection protection circuit power output end LOAD respectively; 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.

17. leakage current detection protection circuit according to claim 1 and 2 is characterized in that: this leakage current detection protection circuit comprises that four pairs are used for mains switch (KR-2-1, KR-2-2, KR-3-1, KR-3-2) that power input and power output end are linked together;

When reset button resets, described four pairs of mains switch closures;

When reset button was threaded off, described four pairs of mains switches disconnected.

18. leakage current detection protection circuit according to claim 1 and 2; it is characterized in that: this leakage current detection protection circuit comprises on power firestreak, the zero line output is respectively establishing at least one contact, this contact or respectively establishing two contacts and be connected with the electric power of input end switch sheet and disconnect.