CN201774223U - Electricity leakage detection protecting circuit - Google Patents
Electricity leakage detection protecting circuit Download PDFInfo
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- CN201774223U CN201774223U CN2010202721632U CN201020272163U CN201774223U CN 201774223 U CN201774223 U CN 201774223U CN 2010202721632 U CN2010202721632 U CN 2010202721632U CN 201020272163 U CN201020272163 U CN 201020272163U CN 201774223 U CN201774223 U CN 201774223U
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Abstract
The utility model discloses an electricity leakage detection protecting circuit which comprises a sensing coil used for detecting leaked current, a self-detection coil used for detecting low resistance faults, a control chip, a tripping coil internally provided with an iron core, and a silicon controlled thyristor; and the electricity leakage detection protecting circuit is characterized by further comprising two tip lightning-shielding metal sheets used for discharging and being in a right-angled triangle or an isosceles triangle, wherein at least one tip lightning-shielding metal sheet is connected with a live wire or a zero wire of a power supply output end. The tip lightning-shielding metal sheets are oppositely arranged, and the distance between the inner sides at the lower parts of the two tip lightning-shielding metal sheets is more than that between the inner sides at the upper parts.
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, longer service life.
Fig. 1 is common leakage current detection protection circuit circuit diagram.As shown in the figure, this leakage current detection protection circuit mainly comprise 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 (model RV4145), the tripping coil SOL that is built-in with iron core, controllable silicon SCR etc.When leak current fault appears in load, when short trouble or low resistance fault, the current imbalance in the supply line then, induction coil L1, output signal to control chip IC1 from magnetic test coil L2, the pin 5 output high level of control chip IC1, trigger the controllable silicon SCR conducting, making in the tripping coil SOL has electric current to flow through, produce magnetic field in the tripping coil SOL, be built in the iron core action in the tripping coil SOL, thereby make the mechanical device action in the supply socket, make the reset button RESET dropout/tripping operation in the supply socket, make with the electric power of reset button RESET interlock and be connected K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 disconnects, the power supply output of the socket of cutting off the electricity supply.
The drawback of this common leakage current detection protection circuit is: when leak current fault, short trouble, low resistance fault etc. appear in load; before bigger short circuit current, fault current do not disappear; bigger fault current, short circuit current are when disjunction electric power connects switch fast; have the dropout impulse current that more powerful back electromotive force forms; controllable silicon SCR, control chip IC1, tripping coil SOL flowed through in short time; greatly reduce the useful life of controllable silicon SCR, control chip IC 1; thereby, the useful life of having reduced leakage current detection protection circuit.
For this reason, the inventor improves common leakage current detection protection circuit.
Summary of the invention
In view of the foregoing, main 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.
Another purpose of the present utility model provides a kind of new pattern creepage that can promote leakage current detection protection circuit useful life greatly and detects protective circuit.
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 comprises the lightning-arrest sheet metal in the tip of two right-angled triangles that are used to discharge or isoceles triangle shape; Wherein, at least one most advanced and sophisticated lightning-arrest sheet metal links to each other with the live wire or the zero line of power output end; The lightning-arrest sheet metal in described tip is staggered relatively, and the distance between two lightning-arrest sheet metal lower inside in tip is greater than the distance between its upper inner.
This leakage current detection protection circuit also includes a reset paths starting switch, the reset button interlock of this reset paths starting switch and supply socket; When reset button was pressed, described reset paths starting switch closure, reset button resetted/thread off/and when tripping, described reset paths starting switch is in off-state;
The common of this leakage current detection protection circuit links to each other with the zero line of power input by described reset paths starting switch, and simultaneously, the common of leakage current detection protection circuit also links to each other with the zero line of power output end; Perhaps, the public power end of leakage current detection protection circuit links to each other with the live wire of power input by described reset paths starting switch, and simultaneously, the public power end of leakage current detection protection circuit also links to each other with the live wire of power output end.
This leakage current detection protection circuit also comprises at least one group of switches set, and this switches set is made of a normal open switch and a normally closed switch of parallel connection; Reset/thread off in the supply socket reset button/moment of tripping, the normal open switch and the normally closed switch of described formation switches set switch.
Description of drawings
Fig. 1 is common leakage current detection protection circuit physical circuit figure;
Fig. 2 is the disclosed leakage current detection protection circuit embodiment 1 physical circuit figure of the utility model;
Fig. 3 is the disclosed leakage current detection protection circuit embodiment 2 physical circuit figure of the utility model;
Fig. 4 is the disclosed leakage current detection protection circuit embodiment 3 physical circuit figure of the utility model;
Fig. 5 is the disclosed leakage current detection protection circuit embodiment 4 physical circuit figure of the utility model;
Fig. 6 is the disclosed leakage current detection protection circuit embodiment 5 physical circuit figure of the utility model;
Fig. 7 is the disclosed leakage current detection protection circuit embodiment 6 physical circuit figure of the utility model;
Fig. 8 is the disclosed leakage current detection protection circuit embodiment 7 physical circuit figure of the utility model.
Embodiment
For fear of before bigger short circuit current, fault current do not disappear; controllable silicon V4, control chip IC1, tripping coil SOL flowed through in the dropout impulse current short time that the more powerful back electromotive force that produces in the circuit forms; the life-span of controllable silicon V4, tripping coil SOL, control chip IC1 is reduced greatly; thereby, reduced the useful life of leakage current detection protection circuit.The utility model has increased at least one group of switches set in leakage current detection protection circuit, this switches set is made of a normal open switch and a normally closed switch of parallel connection.The moment that resets in reset button/trip/thread off by the mechanical device in the supply socket with creepage protection function, switches this group switches set, that is, make the normally closed switch in this switches set disconnect the normal open switch closure; Perhaps make the normally closed switch that is off-state transfer closure to, the normal open switch that is closure state transfers disconnection to.By switching this switches set; the bigger dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve its useful life greatly, further improve the useful life of leakage current detection protection circuit.
When switching this switches set; all the time to keep a switch closure; a switch disconnects; its objective is: guarantee that leakage current detection protection circuit can operate as normal; when occurring leak current fault, short trouble or other fault once more; leakage current detection protection circuit can make the mechanical device action in the supply socket, makes reset button RESET dropout/tripping operation.
As Fig. 2-shown in Figure 7, the switches set that the utility model increases in leakage current detection protection circuit is made of the normally closed switch K1 and the normal open switch K2 of parallel connection.One end of this switches set links to each other with control signal output ends 5 pin of control chip IC1, and the other end extremely links to each other with the control of controllable silicon V4.
When the leakage current detection protection circuit initial condition, normally closed switch K1 closure, normal open switch K2 disconnects.When reset button RESET is pressed, reset paths starting switch KR-4 closure with reset button RESET interlock, the live wire HOT of power input LINE is through induction coil L1, link to each other with the zero line WHITE of power input from magnetic test coil L2, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, shock resistance current-limiting resistance R6, reset paths starting switch KR-4, form the loop, produce the simulation leakage current.After leakage current detection protection circuit detects fault current, the 5 pin output high level of control chip IC1, make controllable silicon V4 conducting, there is 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, mechanical device resets the reset button RESET in the supply socket, and reset paths starting switch KR-4 disconnects, and the simulation leakage current disappears; Be connected K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure with the electric power of reset button RESET interlock, supply socket has power supply output.In the moment that reset button RESET resets; described normally closed switch K1 and normal open switch K2 switch; the normally closed switch K1 that promptly is closure state disconnects; the normal open switch K2 closure that is off-state; in the process that normally closed switch K1, normal open switch K2 switch; the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL disappears; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
After the power supply circuits operate as normal; if break down in the power supply circuits as short circuit, electric leakage, electric arc; leakage current detection protection circuit detects fault; make reset button RESET tripping operation/dropout; in the moment of reset button RESET tripping operation/dropout; described normally closed switch K1 and normal open switch K2 switch again; the normally closed switch K1 that promptly is off-state transfers closure to; the normal open switch K2 that is closure state transfers disconnection to; in the process that normally closed switch K1, normal open switch K2 switch, the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared.So go round and begin again, thereby, make controllable silicon V4, tripping coil SOL avoid passing through big impulse current, the useful life of improving controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit in the short time.
As Fig. 2-shown in Figure 7, the switches set that the utility model is increased in the leakage current detection protection circuit can also be made of the normally closed switch K3 and the normal open switch K4 of parallel connection.One end of this switches set finally links to each other with the zero line WHITE of power input LINE, and the other end links to each other with the negative electrode of controllable silicon V4.
When the leakage current detection protection circuit initial condition, normally closed switch K3 closure, normal open switch K4 disconnects.When reset button RESET is pressed, reset paths starting switch KR-4 closure with reset button RESET interlock, the live wire HOT of power input LINE is through induction coil L1, link to each other with the zero line WHITE of power input from magnetic test coil L2, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, shock resistance current-limiting resistance R6, reset paths starting switch KR-4, form the loop, produce the simulation leakage current.After leakage current detection protection circuit detects fault current, the 5 pin output high level of control chip IC1, make controllable silicon V4 conducting, have 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, the mechanical device in the supply socket resets the reset button RESET in the supply socket, simultaneously, reset paths starting switch KR-4 disconnects, and the simulation leakage current disappears; Be connected K switch R-2-1, KR-2-2, KR-3-1, KR-3-2 closure with the electric power of reset button RESET interlock, supply socket has power supply output.In the moment that reset button RESET resets; described normally closed switch K3 and normal open switch K4 switch; the normally closed switch K3 that promptly is closure state disconnects; the normal open switch K4 closure that is off-state; in the process that normally closed switch K3, normal open switch K4 switch; the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL disappears; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
After the power supply circuits operate as normal; if break down in the power supply circuits; after leakage current detection protection circuit detects fault; make reset button RESET tripping operation/dropout; in the moment of reset button RESET tripping operation/dropout; described normally closed switch K3 and normal open switch K4 switch again; the normally closed switch K3 that promptly is off-state transfers closure to; the normal open switch K4 that is closure state transfers disconnection to; in the process that normally closed switch K3, normal open switch K4 switch, the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared once more.Work so again and again, thereby, make controllable silicon V4, tripping coil SOL avoid passing through big impulse current, the useful life of improving controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit in the short time.
As Fig. 2, Fig. 5, shown in Figure 6, the switches set that the utility model is increased in the leakage current detection protection circuit can also be made of the normally closed switch K5 and the normal open switch K6 of parallel connection.One end of this switches set finally links to each other with the zero line WHITE of power input LINE through switch, resistance, and the other end links to each other with the place of working pin 4 of control chip IC1.
When the leakage current detection protection circuit initial condition, normally closed switch K5 closure, normal open switch K6 disconnects.When reset button RESET is pressed, reset paths starting switch KR-4 closure with reset button RESET interlock, the live wire HOT of power input LINE is through induction coil L1, link to each other with the zero line WHITE of power input from magnetic test coil L2, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, shock resistance current-limiting resistance R6, reset paths starting switch KR-4, form the loop, produce the simulation leakage current.When leakage current detection protection circuit detects fault current; the 5 pin output high level of control chip IC1; 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; mechanical device in the supply socket resets the reset button RESET in the supply socket; in the moment that reset button RESET resets; described reset paths starting switch KR-4 disconnects; the simulation leakage current disappears, and described normally closed switch K5 and normal open switch K6 switch, and promptly normally closed switch K5 disconnects; normal open switch K6 closure; at normally closed switch K5; in the process that normal open switch K6 switches,, make the control chip IC1 can't operate as normal because the place of working pin 4 of control chip IC1 opens circuit; whole leakage current detection protection circuit can't operate as normal, flows through controllable silicon V4; dropout impulse current among the tripping coil SOL disappears.
After the power supply circuits operate as normal; because normal open switch K6 closure; if break down in the power supply circuits; after leakage current detection protection circuit detects fault; make reset button RESET tripping operation/dropout; in the moment of reset button RESET tripping operation/dropout; described normally closed switch K5 and normal open switch K6 switch again; the normally closed switch K5 that promptly is off-state transfers closure to; the normal open switch K6 that is closure state transfers disconnection to, at normally closed switch K5; in the process that normal open switch K6 switches, make the control chip IC1 can't operate as normal; whole leakage current detection protection circuit is not worked, and flows through controllable silicon V4; dropout impulse current among the tripping coil SOL disappears.So go round and begin again, thereby, make controllable silicon V4, tripping coil SOL avoid passing through big impulse current, the useful life of improving controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit in the short time.
As Fig. 2-shown in Figure 7, the switches set that the utility model is increased in the leakage current detection protection circuit can also be made of the normally closed switch K7 and the normal open switch K8 of parallel connection.One end of this switches set finally links to each other with the live wire HOT of power input LINE by resistance R 1, diode V1, tripping coil SOL, and the other end links to each other with the power supply input pin 6 of control chip IC1.
When the leakage current detection protection circuit initial condition, normally closed switch K7 closure, normal open switch K8 disconnects.When reset button RESET is pressed, reset paths starting switch KR-4 closure with reset button RESET interlock, the live wire HOT of power input LINE is through induction coil L1, link to each other with the zero line WHITE of power input from magnetic test coil L2, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, shock resistance current-limiting resistance R6, reset paths starting switch KR-4, form the loop, produce the simulation leakage current.When leakage current detection protection circuit detects fault current; the 5 pin output high level of control chip IC1; 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; mechanical device in the supply socket resets the reset button RESET in the supply socket; in the moment that reset button RESET resets; described reset paths starting switch KR-4 disconnects; the simulation leakage current disappears, and described normally closed switch K7 and normal open switch K8 switch, and promptly normally closed switch K7 disconnects; normal open switch K8 closure; at normally closed switch K7; in the process that normal open switch K8 switches,, make the control chip IC1 can't operate as normal because the power supply input pin 6 of control chip IC1 opens circuit; whole leakage current detection protection circuit can't operate as normal, flows through controllable silicon V4; dropout impulse current among the tripping coil SOL disappears.
After the power supply circuits operate as normal; because normal open switch K8 closure; if break down in the power supply circuits; after leakage current detection protection circuit detects fault; make reset button RESET tripping operation/dropout; in the moment of reset button RESET tripping operation/dropout; described normally closed switch K7 and normal open switch K8 switch again; it is normally closed switch K7 closure; normal open switch K8 disconnects; in the process that normally closed switch K7, normal open switch K8 switch, the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared once more.So go round and begin again, thereby, make controllable silicon V4, tripping coil SOL avoid passing through big impulse current, the useful life of improving controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit in the short time.
As Fig. 3, Fig. 4, shown in Figure 7; the utility model is increased in the switches set that normally closed switch K5 and normal open switch K6 by parallel connection in the leakage current detection protection circuit constitute; the one end can also with pass induction coil L1 and link to each other with zero line WHITE from the power input LINE of magnetic test coil L2, the other end links to each other with the place of working pin 4 of control chip IC1.
Reset button RESET in supply socket resets/trips/moment of threading off; by switching described normally closed switch K5 and normal open switch K6; the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
As shown in Figure 4, the switches set that is increased in the leakage current detection protection circuit of the utility model can also be made of the normally closed switch K9 and the normal open switch K10 of parallel connection.One end of this switches set links to each other with the live wire HOT of power input LINE by shock resistance current-limiting resistance R6, reset paths starting switch KR-4, and the other end links to each other with the anode of controllable silicon V4 by tripping coil SOL.
When the leakage current detection protection circuit initial condition, normally closed switch K9 closure, normal open switch K10 disconnects.When reset button RESET is pressed, reset paths starting switch KR-4 closure with reset button RESET interlock, the live wire HOT of power input LINE is through reset paths starting switch KR-4, shock resistance current-limiting resistance R6, K switch 9 or K switch 10, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, induction coil L1, link to each other with the zero line WHITE of power input from magnetic test coil L2, form the loop, produce the simulation leakage current.After leakage current detection protection circuit detects fault current; make the mechanical device action in the supply socket; mechanical device resets the reset button RESET in the supply socket; in the moment that reset button RESET resets; described reset paths starting switch KR-4 disconnects; the simulation leakage current disappears; described normally closed switch K9 and normal open switch K10 switch; be that normally closed switch K9 disconnects; normal open switch K10 closure; in the process that normally closed switch K9, normal open switch K10 switch, the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared.
After the power supply circuits operate as normal; because normal open switch K10 closure; if break down in the power supply circuits; leakage current detection protection circuit detects fault; make reset button RESET tripping operation/dropout; in the moment of reset button RESET tripping operation/dropout; described normally closed switch K9 and normal open switch K10 switch again; the normally closed switch K9 that promptly is off-state transfers closure to; the normal open switch K10 that is closure state transfers disconnection to; in the process that normally closed switch K9, normal open switch K10 switch, the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared.So go round and begin again, make controllable silicon V4, tripping coil SOL avoid passing through big impulse current, the useful life of improving controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit in the short time.
As shown in Figure 5; the utility model is increased in the switches set that normally closed switch K9 and normal open switch K10 by parallel connection in the leakage current detection protection circuit constitute; the one end can also with pass induction coil L1 and link to each other with live wire HOT from the power input LINE of magnetic test coil L2, the other end links to each other with the anode of controllable silicon V4 by tripping coil SOL.
Reset button RESET in supply socket resets/trips/moment of threading off; by switching described normally closed switch K9 and normal open switch K10; the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
As shown in Figure 7, the utility model is increased in the switches set that the switches set in the leakage current detection protection circuit can also be made of the normally closed switch K11 and the normal open switch K12 of parallel connection, and the one end links to each other with tripping coil SOL, and the other end links to each other with the anode of controllable silicon V4.
Reset button RESET in supply socket resets/trips/moment of threading off; by switching described normally closed switch K11 and normal open switch K12; the dropout impulse current that flows through among controllable silicon V4, the tripping coil SOL is disappeared; thereby; make controllable silicon V4, tripping coil SOL avoid passing through big impulse current in the short time; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
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 leakage current detection protection circuit and coupled external equipment; as Fig. 2, Fig. 6, shown in Figure 8, the disclosed leakage current detection protection circuit of the utility model also includes the lightning-arrest sheet metal M1 in tip and the M2 of one group of right-angled triangle that is used to discharge or isoceles triangle shape.Wherein, the lightning-arrest sheet metal in tip links to each other with the power input live wire HOT from magnetic test coil L2 that passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault, and another most advanced and sophisticated sheet metal of taking shelter from the thunder links to each other with the zero line WHITE of power output end LOAD.Most advanced and sophisticated lightning-arrest sheet metal M1 and M2 are staggered relatively, and the distance between two lightning-arrest sheet metal lower inside in tip is greater than the distance between its upper inner.
When the supply socket power output end has power supply output; if because the instantaneous pressure that thunderbolt or other reasons cause; the air dielectric that is connected to the lightning-arrest sheet metal in tip at power input live wire place and is connected between the lightning-arrest sheet metal in tip at power output end 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.
As shown in Figure 3, in another embodiment of the present utility model, the lightning-arrest sheet metal M1 in a described tip links to each other with the power input zero line WHITE from magnetic test coil L2 that passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault, and another most advanced and sophisticated sheet metal M2 that takes shelter from the thunder links to each other with the live wire HOT of power output end LOAD through resistance R 7.
When the supply socket power output end has power supply output; if because the instantaneous pressure that thunderbolt or other reasons cause; the air dielectric that is connected to the lightning-arrest sheet metal in tip at power input zero line place and is connected between the lightning-arrest sheet metal in tip at power output end live wire 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.
As Fig. 4, shown in Figure 7, in another embodiment of the present utility model, the lightning-arrest sheet metal M2 in a described tip links to each other with the power input zero line WHITE from magnetic test coil L2 that passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault, and another most advanced and sophisticated sheet metal M1 that takes shelter from the thunder links to each other with power output end power firestreak output plughole.
When the power supply output plughole of supply socket power output end has power supply output; if because the instantaneous pressure that thunderbolt or other reasons cause; the air dielectric that is connected to the lightning-arrest sheet metal in tip at power input zero line place and is connected between the lightning-arrest sheet metal in tip at power output end power firestreak output plughole place is breakdown; form atmospherical discharges; most of high pressure consumes by lightning-arrest sheet metal; the residue sub-fraction is by tripping coil SOL; piezo-resistance MOV consumes; 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.
As shown in Figure 5, in another embodiment of the present utility model, the lightning-arrest sheet metal M1 in a described tip links to each other with the power input live wire HOT from magnetic test coil L2 that passes the induction coil L1 that is used to detect leakage current, be used to detect the low resistance fault, and another most advanced and sophisticated sheet metal M2 that takes shelter from the thunder links to each other with power output end zero-power line output plughole.
When the supply hub of supply socket power output end has power supply output; if because the instantaneous pressure that thunderbolt or other reasons cause; the air dielectric that is connected to the lightning-arrest sheet metal in tip at power input live wire place and is connected between the lightning-arrest sheet metal in tip at power output end zero-power line output plughole place is breakdown; form atmospherical discharges; most of high pressure consumes by lightning-arrest sheet metal; the residue sub-fraction is by tripping coil SOL; piezo-resistance MOV consumes; 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.
The lightning-arrest sheet metal in a described tip can also link to each other with power output end power firestreak output plughole; Another most advanced and sophisticated lightning-arrest sheet metal can also link to each other with the zero-power line output plughole of power output end.
In addition, as Fig. 2, Fig. 5, Fig. 6, shown in Figure 8, the utility model also is in series with a shock proof current-limiting resistance R6 and reset paths starting switch KR-4 on power input LINE zero line WHITE.Reset paths starting switch KR-4 and reset button RESET interlock, when reset button RESET is pressed, reset paths starting switch KR-4 closure, when reset button RESET reset, thread off, when tripping, reset paths starting switch KR-4 disconnection.Power input live wire HOT links to each other with power input zero line WHITE through tripping coil SOL, simulation leakage current generating resistance R 5, shock proof current-limiting resistance R6, reset paths starting switch KR-4, constitutes manually simulation leakage current generating loop.
The common of leakage current detection protection circuit (as the place of working pin 4 of control chip IC1 and the negative electrode of controllable silicon V4) links to each other with the zero line of power input by reset paths starting switch KR-4; simultaneously, the common of leakage current detection protection circuit also links to each other with the zero line of power output end.
When reset button RESET is pressed, reset paths starting switch KR-4 closure, power input live wire HOT links to each other with power input zero line WHITE through tripping coil SOL, resistance R 5, shock proof current-limiting resistance R6, closed reset paths starting switch KR-4, produces the simulation leakage current.If leakage current detection protection circuit does not have end-of-life, then reset button RESET resets, and supply socket has power supply output.When reset button RESET resetted, reset paths starting switch KR-4 disconnected, and the simulation leakage current disappears.
After supply socket had power supply output, this reset paths starting switch KR-4 disconnected already, and whole leakage current detection protection circuit is powered by power output end.In addition; when reset button RESET is in trip status; because reset paths starting switch KR-4 is in off-state; make not on-load voltage of the utility model leakage current detection protection circuit; so also can reduce the probability of fault, thereby improve the reliability and the fail safe of leakage current detection protection circuit work.
As Fig. 3, Fig. 4, shown in Figure 7, in another embodiment of the present utility model, shock proof current-limiting resistance R6 of series connection and reset paths starting switch KR-4 on power input LINE live wire HOT.Reset paths starting switch KR-4 and reset button RESET interlock, when reset button RESET is pressed, reset paths starting switch KR-4 closure, when reset button RESET reset, thread off, when tripping, reset paths starting switch KR-4 disconnection.Power input live wire HOT constitutes and manually simulates the leakage current generating loop through reset paths starting switch KR-4, shock proof current-limiting resistance R6, tripping coil SOL, simulation leakage current generating resistance R 5, K switch 6 or K switch 5, induction coil L1, link to each other with power input zero line WHITE from magnetic test coil L2.
The public power end of leakage current detection protection circuit (as the power supply input pin 6 of control chip IC1 and the anode of controllable silicon V4) finally links to each other with the live wire of power input through tripping coil SOL, shock proof current-limiting resistance R6, reset paths starting switch KR-4; simultaneously, the public power end of leakage current detection protection circuit also links to each other with the live wire of power output end.
When reset button RESET is pressed, reset paths starting switch KR-4 closure, power input live wire HOT produces and simulates leakage current through reset paths starting switch KR-4, shock proof current-limiting resistance R6, tripping coil SOL, simulation leakage current generating resistance R 5, induction coil L1, link to each other with power input zero line WHITE from magnetic test coil L2.If leakage current detection protection circuit does not have end-of-life, then reset button RESET resets, and supply socket has power supply output.When reset button RESET resetted, reset paths starting switch KR-4 disconnected, and the simulation leakage current disappears.
After supply socket had power supply output, this reset paths starting switch KR-4 disconnected already, and whole leakage current detection protection circuit is powered by power output end.In addition; when reset button RESET is in trip status; because reset paths starting switch KR-4 is in off-state; make not on-load voltage of the utility model leakage current detection protection circuit; so also can reduce the probability of fault, thereby improve the reliability and the fail safe of leakage current detection protection circuit work.
As shown in Figure 2, the utility model also is in series with the protective resistance R7 that an anti-power supply is threaded off and recoiled and hit between power input LINE zero line WHITE and power output end LOAD zero line WHITE, and its resistance and R6 are similar to be 0 to several ohm.Reset/thread off at reset button RESET/when tripping; can produce inverse electromotive force in the leakage current detection protection circuit; the effect of the protective resistance R7 that this anti-power supply dropout recoil is hit is: stop the impact of inverse electromotive force to circuit, improve the reliability of leakage current detection protection circuit work.
As shown in Figure 3; in another embodiment of the present utility model; between power input LINE live wire HOT and power output end LOAD live wire HOT, be in series with the protective resistance R7 that an anti-power supply is threaded off and recoiled and hit; its effect: stop the impact of inverse electromotive force, improve the reliability of leakage current detection protection circuit work to circuit.
As shown in Figure 2, the utility model has also been adjusted the link position of simulation leakage current generating resistance R 5, resistance R 5 is connected in parallel on the two ends of piezo-resistance MOV.Make resistance R 5 not only have the effect that simulation produces leakage current, also increased the effect that controllable silicon V4 is released energy when ending fast, thereby improve the functional reliability of leakage current detection protection circuit.
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) increased at least one group of switches set in leakage current detection protection circuit, this switches set is made of a normal open switch and a normally closed switch of parallel connection.The moment that resets in reset button/trip/thread off,, this switches set is switched by the mechanical device in the supply socket, that is, make the normally closed switch in this switches set disconnect the normal open switch closure, perhaps make the normally closed switch closure that is off-state, the normal open switch that is closure state disconnects.By switching this switches set; the dropout impulse current that flows through among controllable silicon V4, tripping coil SOL, the control chip IC1 is disappeared; thereby; controllable silicon V4, tripping coil SOL, control chip IC1 are avoided at short notice by big impulse current; improve the useful life of controllable silicon V4, tripping coil SOL greatly, the useful life of further improving leakage current detection protection circuit.
(2) because the utility model is provided with a pair of most advanced and sophisticated sheet metal that is used to discharge; when supply socket has power supply output; if between 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 between the lightning-arrest sheet metal in tip of output is breakdown; form atmospherical discharges; the instantaneous pressure that produces is consumed by lightning-arrest sheet metal; 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.
(3) the utility model also is in series with a shock proof current-limiting resistance R6 and reset paths starting switch KR-4 on power input zero line or live wire.Whether control whole leakage current detection protection circuit by control switch KR-4 works, guarantee leakage protection circuit on-load voltage not under the state of threading off, so also can reduce the probability of fault, thereby improve the reliability and stability of leakage current detection protection circuit work; Simultaneously, also saved electric energy.
(4) because the utility model has also increased a protective resistance R7 that anti-power supply is threaded off and recoiled and hit between power input and power output end; its resistance parameter and R6 are similar; between resistance is 0 to several ohm; stop the impact of inverse electromotive force to circuit; thereby, further improved circuit working reliability of the present utility model and fail safe.
(5) because the utility model has also been adjusted the link position of simulation leakage current generating resistance R 5; resistance R 5 is connected in parallel on the two ends of piezo-resistance MOV; make resistance R 5 not only have the effect that simulation produces leakage current; also increase the effect that controllable silicon V4 is released energy when ending fast, thereby improved the functional reliability of leakage protection circuit.
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 (20)
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 comprises the lightning-arrest sheet metal (M1 and M2) in the tip of two right-angled triangles that are used to discharge or isoceles triangle shape wherein, and at least one most advanced and sophisticated lightning-arrest sheet metal links to each other with the live wire or the zero line of power output end;
Taking shelter from the thunder in described tip, (M1 and M2) is staggered relatively for sheet metal, and the distance between the lightning-arrest sheet metal lower inside in two tips is greater than the distance between its upper inner.
2. leakage current detection protection circuit according to claim 1; it is characterized in that: the lightning-arrest sheet metal in a described tip with pass the induction coil (L1) that is used to detect leakage current, the power input from magnetic test coil (L2) (LINE) live wire that is used to detect the low resistance fault links to each other, another tip sheet metal of taking shelter from the thunder links to each other with the zero line of power output end (LOAD).
3. leakage current detection protection circuit according to claim 1; it is characterized in that: the lightning-arrest sheet metal (M1) in a described tip with pass the induction coil (L1) that is used to detect leakage current, the power input from magnetic test coil (L2) (LINE) zero line that is used to detect the low resistance fault links to each other, another tip sheet metal (M2) of taking shelter from the thunder links to each other with the live wire of power output end (LOAD).
4. leakage current detection protection circuit according to claim 1; it is characterized in that: the lightning-arrest sheet metal in a described tip with pass the induction coil (L1) that is used to detect leakage current, (LINE) zero line of the power input from magnetic test coil (L2) or the live wire that is used to detect the low resistance fault links to each other, another tip sheet metal of taking shelter from the thunder links to each other with power output end power firestreak output plughole or power output end (LOAD) zero-power line output plughole.
5. leakage current detection protection circuit according to claim 1 is characterized in that: the lightning-arrest sheet metal in a described tip links to each other with power output end power firestreak output plughole; Another most advanced and sophisticated lightning-arrest sheet metal links to each other with the zero-power line output plughole of power output end.
6. according to the described leakage current detection protection circuit of one of claim 1-5, it is characterized in that: this leakage current detection protection circuit also includes a reset paths starting switch (KR-4), the reset button interlock of this reset paths starting switch and supply socket; When reset button was pressed, described reset paths starting switch (KR-4) closure, reset button resetted/thread off/and when tripping, described reset paths starting switch (KR-4) is in off-state;
The common of this leakage current detection protection circuit links to each other with the zero line of power input by described reset paths starting switch (KR-4), and simultaneously, the common of leakage current detection protection circuit also links to each other with the zero line of power output end; Perhaps, the public power end of leakage current detection protection circuit links to each other with the live wire of power input by described reset paths starting switch (KR-4), and simultaneously, the public power end of leakage current detection protection circuit also links to each other with the live wire of power output end.
7. leakage current detection protection circuit according to claim 6 is characterized in that: this leakage current detection protection circuit also comprises the shock proof current-limiting resistance (R6) of a series connection; This shock proof current-limiting resistance (R6) and described reset paths starting switch (KR-4) are connected in power input (LINE) zero line or the live wire;
The power input live wire links to each other with the power input zero line through described tripping coil (SOL), simulation leakage current generating resistance (R5), shock proof current-limiting resistance (R6), reset paths starting switch (KR-4), constitutes simulation leakage current generating loop.
8. leakage current detection protection circuit according to claim 7, it is characterized in that: an end of described reset paths starting switch (KR-4) links to each other with the power input zero line, and the other end finally links to each other with the place of working pin (4 pin) of silicon controlled negative electrode and control chip; The other end of described reset paths starting switch (KR-4) also links to each other with the zero line of power output end.
9. leakage current detection protection circuit according to claim 7, it is characterized in that: an end of described reset paths starting switch (KR-4) links to each other with the power input live wire, and the other end finally links to each other with the working power input pin (6 pin) of silicon controlled anode and control chip; The other end of described reset paths starting switch (KR-4) also links to each other with the live wire of power output end.
10. according to Claim 8 or 9 described leakage current detection protection circuits, it is characterized in that: this leakage current detection protection circuit also comprises at least one group of switches set, and this switches set is made of a normal open switch and a normally closed switch of parallel connection; Reset/thread off in the supply socket reset button/moment of tripping, the normal open switch and the normally closed switch of described formation switches set switch;
This switches set is connected in the leakage current detection protection circuit.
11. leakage current detection protection circuit according to claim 10 is characterized in that: described switches set is made of the normally closed switch (K1) and the normal open switch (K2) of parallel connection;
One end of this switches set links to each other with the control signal output ends of control chip (IC1) (5 pin), and the other end extremely links to each other with the control of controllable silicon (V4).
12. leakage current detection protection circuit according to claim 10 is characterized in that: described switches set is made of the normally closed switch (K3) and the normal open switch (K4) of parallel connection; One end of this switches set links to each other through the zero line of described reset paths starting switch (KR-4) with power input (LINE), and the other end links to each other with the negative electrode of controllable silicon (V4).
13. leakage current detection protection circuit according to claim 10 is characterized in that: described switches set is made of the normally closed switch (K5) and the normal open switch (K6) of parallel connection; One end of this switches set links to each other with the zero line of power input (LINE) through resistance, described reset paths starting switch (KR-4), and the other end links to each other with the place of working pin (4) of control chip (IC1).
14. leakage current detection protection circuit according to claim 10 is characterized in that: described switches set is made of the normally closed switch (K7) and the normal open switch (K8) of parallel connection; One end of this switches set finally links to each other with the live wire of power input (LINE) by resistance (R1), diode (V1), tripping coil (SOL), links to each other, and the other end links to each other with the power supply input pin (6) of control chip (IC1).
15. leakage current detection protection circuit according to claim 10; it is characterized in that: described switches set is made of the normally closed switch (K5) and the normal open switch (K6) of parallel connection; one end of this switches set with pass induction coil (L1) and link to each other with zero line from the power input (LINE) of magnetic test coil (L2), the other end links to each other with the place of working pin (4) of control chip (IC1).
16. leakage current detection protection circuit according to claim 10 is characterized in that: described switches set is made of the normally closed switch (K9) and the normal open switch (K10) of parallel connection; One end of this switches set links to each other with the live wire of power input (LINE) by shock resistance current-limiting resistance (R6), described reset paths starting switch (KR-4), and the other end links to each other with the anode of controllable silicon (V4) by tripping coil (SOL).
17. leakage current detection protection circuit according to claim 10; it is characterized in that: described switches set is made of the normally closed switch (K9) and the normal open switch (K10) of parallel connection; one end of this switches set with pass induction coil (L1) and link to each other with live wire from the power input (LINE) of magnetic test coil (L2), the other end links to each other with the anode of controllable silicon (V4) by tripping coil (SOL).
18. leakage current detection protection circuit according to claim 10; it is characterized in that: described switches set is made of the normally closed switch (K11) and the normal open switch (K12) of parallel connection; one end of this switches set links to each other with tripping coil (SOL), and the other end links to each other with the anode of controllable silicon (V4).
19. leakage current detection protection circuit according to claim 18 is characterized in that: described simulation leakage current generating resistance (R5) is connected in parallel on the two ends of piezo-resistance (MOV) in the circuit.
20. leakage current detection protection circuit according to claim 19 is characterized in that: described leakage current detection protection circuit also comprises the protective circuit resistance (R7) that an anti-power supply is threaded off and recoiled and hit;
The protective resistance (R7) that this anti-power supply dropout recoil is hit is connected between power input (LINE) live wire and power output end (LOAD) live wire; Perhaps, this anti-power supply protective resistance (R7) that recoil hits of threading off is connected between power input (LINE) zero line and power output end (LOAD) zero line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202721632U CN201774223U (en) | 2009-11-19 | 2010-07-27 | Electricity leakage detection protecting circuit |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910222611 | 2009-11-19 | ||
| CN200910222611.X | 2009-11-19 | ||
| CN2010202721632U CN201774223U (en) | 2009-11-19 | 2010-07-27 | Electricity leakage detection protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201774223U true CN201774223U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010237744.7A Active CN102074930B (en) | 2009-11-19 | 2010-07-27 | Electric leakage detection protective circuit |
| CN2010202721632U Expired - Fee Related CN201774223U (en) | 2009-11-19 | 2010-07-27 | Electricity leakage detection protecting circuit |
| CN201020272169XU Expired - Lifetime CN201774225U (en) | 2009-11-19 | 2010-07-27 | Electric leakage detecting protection circuit |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010237744.7A Active CN102074930B (en) | 2009-11-19 | 2010-07-27 | Electric leakage detection protective circuit |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201020272169XU Expired - Lifetime CN201774225U (en) | 2009-11-19 | 2010-07-27 | Electric leakage detecting protection circuit |
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| CN (3) | CN102074930B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107438356A (en) * | 2017-08-08 | 2017-12-05 | 芜湖市凯鑫避雷器有限责任公司 | A kind of electric leakage screening arrangement of electric ceramic lightning arrester |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102074930B (en) * | 2009-11-19 | 2014-04-02 | 黄华道 | Electric leakage detection protective circuit |
| CN103401214A (en) * | 2013-07-17 | 2013-11-20 | 温州市万盛电器有限公司 | Electric leakage detection protection circuit with timing self-checking function |
| JP6399442B2 (en) * | 2014-08-07 | 2018-10-03 | パナソニックＩｐマネジメント株式会社 | Power supply control device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2840400Y (en) * | 2005-11-01 | 2006-11-22 | 黄华道 | Leakage protection socket service life stop display circuit |
| CN2852454Y (en) * | 2005-11-02 | 2006-12-27 | 黄华道 | End-to-life display circuit of earth leakage protective socket |
| JP4931754B2 (en) * | 2007-10-03 | 2012-05-16 | 三菱電機株式会社 | Earth leakage breaker |
| CN102074930B (en) * | 2009-11-19 | 2014-04-02 | 黄华道 | Electric leakage detection protective circuit |
-
2010
- 2010-07-27 CN CN201010237744.7A patent/CN102074930B/en active Active
- 2010-07-27 CN CN2010202721632U patent/CN201774223U/en not_active Expired - Fee Related
- 2010-07-27 CN CN201020272169XU patent/CN201774225U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107438356A (en) * | 2017-08-08 | 2017-12-05 | 芜湖市凯鑫避雷器有限责任公司 | A kind of electric leakage screening arrangement of electric ceramic lightning arrester |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102074930A (en) | 2011-05-25 |
| CN201774225U (en) | 2011-03-23 |
| CN102074930B (en) | 2014-04-02 |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20110323 Termination date: 20140727 |
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