CN102931632B - Current leakage protection circuit with working status display and real-time fault display functions - Google Patents
Current leakage protection circuit with working status display and real-time fault display functions Download PDFInfo
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- CN102931632B CN102931632B CN201210377055.5A CN201210377055A CN102931632B CN 102931632 B CN102931632 B CN 102931632B CN 201210377055 A CN201210377055 A CN 201210377055A CN 102931632 B CN102931632 B CN 102931632B
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 46
- 229910052710 silicon Inorganic materials 0.000 claims description 46
- 239000010703 silicon Substances 0.000 claims description 46
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000004020 conductor Substances 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 9
- 230000000875 corresponding Effects 0.000 claims description 7
- 230000037250 Clearance Effects 0.000 claims description 6
- 230000035512 clearance Effects 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
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- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
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Abstract
The invention provides a current leakage protection circuit with the working status display and real-time fault display functions. The current leakage protection circuit comprises a combination switch, the combination switch enables a trip coil to form a simulated leakage current penetrating through double induction coils in a cross way to generate a loop at the moment when a reset button is pressed down, and the moving contact end of the combination switch is in contact with the other conducting contact end when the reset button drives a main loop switch to turn on and reset successfully and works as a trip coil channel switch so that the trip coil forms a detection loop not penetrating through the double induction coils in a cross way. A two-color display diode is also arranged, and a fault indicating lamp is connected with the trip coil in parallel and illuminates when the trip coil is an opened-circuit; and a working status indicating lamp illuminates when the trip coil channel switch is reset successfully. The current leakage protection circuit has the advantages that the working status is display in real time in the working process after successful resetting and faults are reminded in time through the combination of the combination switch and the two-color display diode, and the current leakage protection circuit is safe and convenient to use; and the current leakage protection circuit is reasonable in arrangement and capable of effectively reducing the temperature rise and preventing light striking.
Description
Technical field
The present invention relates to is a kind of leakage protection circuit with operating state display and instant malfunction coefficient function be installed in earth leakage protective socket.
Background technology
Along with the raising that electrical safety requires; mechanical forced can thread off, carry out state instruction etc. function when resetting successfully when earth leakage protective socket needs earth leakage protective, reverse-connection protection, end-of-life; existing leakage protection circuit does not have instant malfunction coefficient function usually; namely resetting in the normal use procedure successfully, when there is suddenly components and parts fault, circuit can not carry out instant playback.Usually; because tripping coil only can bear big current in short-term in the elements such as the control chip in leakage protection circuit, controllable silicon, tripping coil; the probability that in various fault, tripping coil blows is the highest, also often causes tripping coil to blow if control chip or controllable silicon damage.Therefore normally whether is kept substantially can to complete instant malfunction coefficient function by display circuit monitoring tripping coil.Also some are had to have work state display function in existing leakage protection circuit, the utility model patent being 201020287432.2 as the patent No. discloses a kind of leakage current detection protection circuit, and it comprises induction coil for detecting leakage current, for detecting the self-excitation coil of low resistance fault, control chip, the tripping coil being built-in with iron core, controllable silicon, the major loop switch etc. that links with reset button; This leakage current detection protection circuit also comprises a display circuit, and this display circuit is by dichromatic LED, and diode and current-limiting resistance are formed; After reset button resets, in dichromatic LED, only have a kind of light-emitting diode of color bright; After reset button is threaded off, the light-emitting diode of two kinds of colors in dichromatic LED is all bright; When this leakage current detection protection circuit wiring is correct, the light-emitting diode of two kinds of colors of dichromatic LED Cao is all bright, otherwise when this leakage current detection protection circuit wiring error, the light-emitting diode of two kinds of colors in dichromatic LED does not all work.
Existing leakage protection circuit is owing to being subject to the restriction of mechanical organ shape and structure; on circuit board, components and parts are too much overstocked; gap is each other little; easily occur in electric discharge between electronic devices and components solder joint and discharge without electric discharge sheet thus damage the situation of circuit board; each sheet metal volume is little; heat radiation is slow, and temperature rise, device easily strains.The patent No. be 201020287432.2 utility model patent there is above-mentioned situation equally, therefore, can prevent components and parts from striking sparks and in use can carry out malfunction coefficient in time again and just become leakage protection circuit problem demanding prompt solution.
Summary of the invention
For the problems referred to above that prior art exists, the invention provides a kind of leakage protection circuit with operating state display and instant malfunction coefficient function.
For achieving the above object, the present invention institute by the following technical solutions:
There is the leakage protection circuit of operating state display and instant malfunction coefficient function, comprise power input, power output end, load end, for detecting two induction coil L1 of leakage current and low resistance fault, L2, control chip IC1, be built-in with the tripping coil S0L of iron core, controllable silicon V4 and the major loop switch (KR2-1 linked with reset button, KR2-2), it is characterized in that: also comprise a unit switch KR-2 linked with reset button, the dynamic contact jaw of unit switch is pressed moment in reset button and contact with the second conductive contact end 37A and produce switch tripping coil SOL is formed cross through the simulation leakage current of pair induction coil to produce loop as simulating leakage current, the dynamic contact jaw of unit switch contacts measure loop tripping coil SOL being formed do not cross through pair induction coil as tripping coil channel selector with conductive contact end 35B when reset button drives the success of major loop switch closed reduction, also be provided with double-colored display diode (LED) 1-R, LED1-G, the malfunction indicator lamp LED1-R in double-colored display diode is in parallel with tripping coil, lights when tripping coil is opened a way, working station indicator LED1-G in double-colored display diode is bright at the successful time point of reset through tripping coil channel selector.
Further, the dynamic contact jaw of described unit switch is connected with one of power output end, unit switch has a pair and presses in reset button moment contacts conducting simultaneously conductive contact end with dynamic contact jaw, and the first conductive contact end and homophase are positioned at major loop switch that unit switch moves contact jaw and move contact jaw and contact conducting when major loop switch is not closed; What the second conductive contact end of unit switch moved contact jaw by a current-limiting resistance and out of phase in power input in unit switch one is connected, move contact jaw at unit switch to follow reset button and press the life-span stop detection loop being formed instantaneously and cross through two induction coils, this conductive contact end is connected with controllable silicon negative electrode through I-III diode V1c simultaneously; What silicon controlled negative electrode and out of phase in power input moved contact jaw in unit switch one is connected, and input and the homophase of tripping coil are positioned at unit switch and move one of contact jaw and be connected, and form the tripping coil path not crossing through two induction coils.
Further, the 3rd conductive contact end 37B that the second conductive contact end 37A and producing switch for forming simulation leakage current in described unit switch is suspended in below one of dynamic contact jaw of major loop switch (KR2-1, KR2-2) is connected, and the second conductive contact end 37A of unit switch is connected with corresponding power input by one of dynamic contact jaw of the 3rd conductive contact end 37B, major loop switch (KR2-1, KR2-2) under major loop switch cut-off switch state.
Further, the Test Switchboard also comprising a testing button and link with testing button, one of Test Switchboard one end and power input are movably connected, the other end is connected with the power output end of out of phase by a current-limiting resistance, and power input and power output end form by Test Switchboard and current-limiting resistance the test loop producing simulation leakage current.
Preferably, the input of described tripping coil is connected with the live wire end of power input, the output of tripping coil is by current-limiting resistance R1, I-III diode V1a is connected with the power end of control chip IC1, the earth terminal of control chip is connected with the dynamic contact jaw 36C of unit switch by the 5th diode V5, the earth terminal of control chip is also connected with the anode of the I-I diode V1a introducing control chip power end by the 3rd-II diode V3-II being in reverse to the 5th diode V5, the dynamic contact jaw 36C of unit switch is connected with the power end of control chip by I-II diode V1b, malfunction indicator lamp LED1-R is connected with the output of tripping coil with the common cathode of working station indicator LED1-G, forms the upper and lower overlap condition in contact.
Preferably, the dynamic contact jaw 36C of described unit switch is connected with the input of tripping coil, first conductive contact end 35B of unit switch is connected with the live wire end of power input, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input through two induction coil by a 3rd conductive contact end 37B be suspended in below the live wire K switch R2-1 of major loop switch; Silicon controlled negative electrode is connected with the zero line side of power input through diode; Malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6,3rd diode V3 anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input, and the negative electrode of working station indicator LED1-G is connected with the power end of control chip; Power output end is provided with pair of conductive contact jaw with input each being connected, and all contacts conducting with the dynamic contact jaw of major loop switch, form upper and lower overlap condition when major loop K switch R2-1, KR2-2 close.
Preferably, the dynamic contact jaw 36C of described unit switch is connected with tripping coil input, first conductive contact end 35B of unit switch is connected with the live wire end of power input, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input through two induction coil by a 3rd conductive contact end 37B be suspended in below the zero line K switch R2-1 of major loop switch; Silicon controlled negative electrode is connected with the earth terminal of control chip; Malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6,3rd diode V3 anode is connected with the dynamic contact jaw 36C of unit switch, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input, working station indicator LED1-G is connected with malfunction indicator lamp LED1-R common cathode, and negative electrode is connected with tripping coil output; Power output end and load end are respectively provided with pair of conductive contact jaw, all contact conducting with the dynamic contact jaw of major loop switch, form upper and lower overlap condition when major loop switch closes.
Preferably, the dynamic contact jaw 36C of described unit switch is connected with the input of tripping coil, first conductive contact end 35B of unit switch is connected with the live wire end of power input through two induction coil, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the zero line side of power input through two induction coil by a diode, malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6, 3rd diode V3 anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input through two induction coil, the negative electrode of working station indicator LED1-G is connected with the power end of control chip, power output end and load end are respectively provided with pair of conductive contact jaw, have two to dynamic contact jaw corresponding with power output end and load end respectively, contact conducting respectively time closed with power output end with load end at major loop switch.
Preferably, the dynamic contact jaw 36C of described unit switch is connected with silicon controlled negative electrode through diode, first conductive contact end 35B of unit switch is connected with the zero line side of power input through two induction coil, and the second conductive contact end 37A of unit switch is connected with the zero line side of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the dynamic contact jaw 36C of unit switch by a diode, malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6, 3rd diode V3 anode is connected through two live wire end of induction coil and the input of tripping coil with power input, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the dynamic contact jaw 36C of unit switch, the negative electrode of working station indicator LED1-G is finally connected with the power end of control chip, load end is drawn from power output end respective terminal.
Further; this leakage protection circuit with instant malfunction coefficient function also comprises one for the timer DSQ of timely checking circuit functional completeness; the power end Vcc of timer DSQ is connected with tripping coil output; the output OUT of timer DSQ is connected with the gate pole of controllable silicon V4, and the earth terminal of timer DSQ is connected with the earth terminal of control chip and controllable silicon negative electrode.
Further, the dynamic contact jaw of described major loop switch (KR2-1, KR2-2) is provided with the metal discharge sheet of a pair matched in clearance, and the front end of metal discharge sheet has electric discharge cambered surface or discharge tip.Major loop switch plate becomes two-in-one state with metal discharge sheet.
Further, described unit switch conductive contact end one end 35B is suspended in the top of dynamic contact jaw 36C, and the other end is connected with power input, and middle part has the discharge part 35A forming one group of conductor that discharges with another power input matched in clearance.
Further, described unit switch first conductive contact end 35B draws the terminal that has discharge part 35A, and this terminal is connected with one of power input; Described testing button is linkedly set with a quiet contact conductor, and the terminal that quiet contact conductor one end 25B and unit switch conductive contact end are drawn contacts conducting movably.
Compared with prior art, beneficial effect of the present invention is: by the combination of unit switch and double-colored display diode, resetting instant playback operating state in the course of work successfully reminding in time when breaking down, safe and convenient to use; Circuit arranges rationally, effectively reduces temperature rise, prevents sparking; Timer timely checking circuit functional completeness is set, major loop switch-linear hybrid metal discharge sheet, can direct radiating and cooling, can prevent again impacting with high pressure from discharging, reduce and make mould and simplify assembly technology, improve fail safe further.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the embodiment of the present invention one;
Fig. 2 is the circuit diagram of the embodiment of the present invention two;
Fig. 3 is the circuit diagram of the embodiment of the present invention three;
Fig. 4 is the circuit diagram of the embodiment of the present invention four;
Fig. 5 is the circuit diagram of the embodiment of the present invention five;
Fig. 6 is the circuit diagram of the embodiment of the present invention six.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further detailed explanation:
implement one
With reference to shown in Fig. 1, there is the leakage protection circuit of instant malfunction coefficient function, comprise power input, power output end, load end, for detecting two induction coil (L1 of leakage current and low resistance fault, L2), control chip IC1, be built-in with the tripping coil S0L of iron core, controllable silicon V4 and the major loop switch (KR2-1 linked with reset button, KR2-2), also comprise a unit switch KR-2 linked with reset button, the dynamic contact jaw of unit switch is pressed moment and one of them conductive contact end in contact in reset button and is produced switch tripping coil SOL is formed cross through the simulation leakage current of pair induction coil to produce loop as simulate leakage current, the dynamic contact jaw of unit switch makes tripping coil SOL be formed not cross through the measure loop of pair induction coil as tripping coil channel selector with another conductive contact end in contact when reset button drives the success of major loop switch closed reduction, also be provided with double-colored display diode (LED1-R, LED1-G), the malfunction indicator lamp LED1-R in double-colored display diode is in parallel with tripping coil, lights when tripping coil is opened a way, working station indicator LED1-G in double-colored display diode is bright at the successful time point of reset through tripping coil channel selector.The connected mode of tripping coil, controllable silicon, control chip and two induction coil is that the patent documents such as 201020287432.2 have been described in detail in the patent No., and therefore not to repeat here.
In the present embodiment, the dynamic contact jaw 36C of unit switch is connected with controllable silicon V4 negative electrode through I-III diode V1c, one of the conductive contact end of unit switch 35B is connected with one of power input, and dynamic contact jaw 36C keeps contacting conducting as tripping coil channel selector with the first conductive contact end 35B after reset button drives major loop switch (KR2-1, KR2-2) closed; Second conductive contact end 37A of unit switch with through two induction coil L1, L2 and the power input that homophase is positioned at the first conductive contact end 35B be connected, dynamic contact jaw 36C presses instantaneously in reset button that contacting conducting with the second conductive contact end 37A produces switch as simulating leakage current; Controllable silicon V4 anode is connected with the power input of another out of phase through tripping coil L3; The anode of the malfunction indicator lamp LED1-R in double-colored display diode is connected with tripping coil L3 input by the 6th resistance R6, the 3rd diode V3, the negative electrode of malfunction indicator lamp LED1-R is connected with tripping coil output, the anode of working station indicator LED1-G is connected with the dynamic contact jaw 36C of unit switch by the 5th resistance R5, the second diode V2, and the negative electrode of working station indicator LED1-G is connected to the power end of tripping coil output or control chip IC1.
For preventing components and parts gap too small and spark phenomenon occurring, the 3rd conductive contact end 37B that the second conductive contact end 37A and producing switch for forming simulation leakage current in unit switch is suspended in below one of dynamic contact jaw of major loop switch (KR2-1, KR2-2) is connected, and the second conductive contact end 37A of unit switch is connected with corresponding power input by one of dynamic contact jaw of the 3rd conductive contact end 37B, major loop switch (KR2-1, KR2-2) under major loop switch cut-off switch state.
For ease of life-span stop detection, the Test Switchboard KR-5 that this leakage protection circuit with instant malfunction coefficient function also comprises a testing button TEST and links with testing button, Test Switchboard one end is led to touch for the activity of electric discharge sheet 25B point and also can be movably connected for zero line side WHITE is connected to be fixedly connected with one of power input Fig. 1, adopt in this example and be movably connected, the other end is connected with the power output end live wire end HOT of out of phase by a current-limiting resistance H2, power input and power output end form by Test Switchboard and current-limiting resistance the test loop producing simulation leakage current.
Malfunction indicator lamp LED1-R in double-colored display diode chooses red display usually, working station indicator LED1-G chooses green display usually, if the life-span does not stop, reset successfully, working station indicator LED1-G lights at the negative half period of supply voltage, because tripping coil is not opened a way, the voltage be carried on tripping coil is very little, be not enough to light malfunction indicator lamp LED1-R, when occurring that tripping coil blows in use procedure, malfunction indicator lamp LED1-R lights immediately, working station indicator LED1-G extinguishes simultaneously, reminding user to replace earth leakage protective socket.In the present embodiment, circuit is except whether detection tripping coil blows, such as tripping coil is not damaged and extreme case that control chip damages very rarely also can make corresponding display, when control chip damages because impedance between power end 6 pin and earth terminal 4 pin increases, working station indicator LED1-G cannot light, and at this moment also illustrates that circuit has fault.
The I-I diode V1a that unit switch moves I-IV diode V1d that contact jaw 36C connects through the I-III diode V1c of Opposite direction connection, forward, forward connects is connected with the power end of control chip.Drive major loop K switch R2-1, KR2-2 when reset button moves up and contact conducting with power output end and load end, K switch R-3-1, KR-3-2 close load end has power supply output services status indicator lamp to light.
For optimizing the space structure in socket, unit switch conductive contact end one end 35B is suspended in the top of dynamic contact jaw 36C, and the other end is connected with power input, and middle part has the discharge part 35A forming one group of conductor that discharges with another power input matched in clearance.Unit switch first conductive contact end 35B draws the terminal that has discharge part 35A, and this terminal is connected with one of power input; Testing button is linkedly set with a quiet contact conductor, and the terminal that quiet contact conductor one end 25B and unit switch conductive contact end are drawn contacts conducting movably.
Also be included in when malfunction indicator lamp LED1-R lights and force snap close to move to make lockhole be separated the testing button tripping and then cut off input and be connected with the power supply of output with reset guide post by mechanical structure.Answer malfunction coefficient lamp LED1-R to light during reset operating state and prove this leakage protection circuit end-of-life; press testing button to force snap close to move and lockhole is in line with reset guide groove be separated tripping operation; cut off input to be connected with the power supply of output, then press reset button and automatically can stop reset.
Working station indicator is answered to extinguish during reset operating state; prove that this leakage protection circuit integrated package damages end-of-life; press testing button to force snap close to move and lockhole and reset guide groove are in line be separated the moving contact that trips to decline; input of cutting off the electricity supply is connected with the power supply of output, then presses reset button and automatically can stop reset.
embodiment two
With reference to Fig. 2, the present embodiment is with the difference of embodiment one: the input of tripping coil SOL is connected with the live wire end of power input, the output of tripping coil is by current-limiting resistance R1, I-I diode V1a is connected with the power end of control chip IC1, the earth terminal of control chip is connected with the dynamic contact jaw 36C of unit switch by the 5th diode V5, the earth terminal of control chip is also connected with the anode of the I-I diode V1a introducing control chip power end by the 3rd-II diode V3-II being in reverse to the 5th diode V5, the dynamic contact jaw 36C of unit switch is connected with the power end of control chip by I-II diode V1b, malfunction indicator lamp LED1-R is connected with the output of tripping coil with the common cathode of working station indicator LED1-G.Malfunction indicator lamp LED1-R in the present embodiment in double-colored display diode is connected with working station indicator LED1-G common cathode, and its circuit structure is more succinct, and space is more economized.
embodiment three
With reference to Fig. 3, the present embodiment is with the difference of embodiment one: the dynamic contact jaw 36C of unit switch is connected with the input of tripping coil, first conductive contact end 35B of unit switch is connected with the live wire end of power input, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input through two induction coil by a 3rd conductive contact end 37B be suspended in below the live wire K switch R2-1 of major loop switch; Silicon controlled negative electrode is connected with the zero line side of power input through diode; Malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6,3rd diode V3 anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input, and the negative electrode of working station indicator LED1-G is connected with the power end of control chip; Power output end and input are respectively provided with pair of conductive contact jaw, and two pairs of conductive contact end mutual conduction, all contact conducting with the dynamic contact jaw of major loop switch when major loop switch closes.Form the upper and lower overlap condition in contact.
embodiment four
With reference to Fig. 4, the present embodiment is with the difference of embodiment one: the dynamic contact jaw 36C of unit switch is connected with tripping coil input, first conductive contact end 35B of unit switch is connected with the live wire end of power input, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input through two induction coil by a 3rd conductive contact end 37B be suspended in below the zero line K switch R2-1 of major loop switch; Silicon controlled negative electrode is connected with the earth terminal of control chip; Malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6,3rd diode V3 anode is connected with the dynamic contact jaw 36C of unit switch, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input, working station indicator LED1-G is connected with malfunction indicator lamp LED1-R common cathode, and negative electrode is connected with tripping coil output; Power output end and load end are respectively provided with pair of conductive contact jaw, all contact conducting with the dynamic contact jaw of major loop switch when major loop switch closes.Form the upper and lower overlap condition in contact.
embodiment five
With reference to Fig. 5, the present embodiment is with the difference of embodiment one: the dynamic contact jaw 36C of unit switch is connected with the input of tripping coil, first conductive contact end 35B of unit switch is connected with the live wire end of power input through two induction coil, and the second conductive contact end 37A of unit switch is connected with the live wire end of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the zero line side of power input through two induction coil by a diode, malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6, 3rd diode V3 anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the zero line side of power input through two induction coil, the negative electrode of working station indicator LED1-G is connected with the power end of control chip, power output end and load end are respectively provided with pair of conductive contact jaw, have two to dynamic contact jaw corresponding with power output end and load end respectively, contact conducting respectively time closed with power output end with load end at major loop switch.
embodiment six
With reference to Fig. 6, the present embodiment is with the difference of embodiment one: the dynamic contact jaw 36C of unit switch is connected with silicon controlled negative electrode through I-III diode V1c, first conductive contact end 35B of unit switch is connected with the zero line side of power input through two induction coil, and the second conductive contact end 37A of unit switch is connected with the zero line side of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the dynamic contact jaw 36C of unit switch by a diode, malfunction indicator lamp LED1-R anode is connected with the 3rd diode V3 negative electrode by the 6th resistance R6, 3rd diode V3 anode is connected through two live wire end of induction coil and the input of tripping coil with power input, the negative electrode of malfunction indicator lamp LED1-R is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator LED1-G is connected with the negative electrode of the second diode V2 by the 5th resistance R5, the anode of the second diode V2 is connected with the dynamic contact jaw 36C of unit switch, the negative electrode of working station indicator LED1-G is connected with the power end of control chip, load end is drawn from power output end respective terminal.
Be energy-saving and cost-reducing; this leakage protection circuit with instant malfunction coefficient function also comprises one for the timer DSQ of timely checking circuit functional completeness; the power end Vcc of timer DSQ is connected with tripping coil output; the output OUT of timer DSQ is connected with the gate pole of controllable silicon V4, and the earth terminal of timer DSQ is connected with the earth terminal of control chip.Timer DSQ timing sends a Continuity signal to controllable silicon gate pole, if circuit function is intact, major loop switch trip, leakage protection circuit is in power down mode, if the life-span stops, then can not normally trip, the earth leakage protective socket that prompting user more renews.
For preventing instantaneous pressure from causing damage to circuit, the dynamic contact jaw of major loop switch (KR2-1, KR2-2) is provided with the metal discharge sheet of a pair matched in clearance, and the front end of metal discharge sheet has electric discharge cambered surface or discharge tip.Major loop switch plate becomes two-in-one state with metal discharge sheet.The setting of timer DSQ and electric discharge sheet is equally applicable to previous embodiment.
Although the present invention has illustrated by reference to preferred embodiment and has described, those of ordinary skill in the art should understand, and can be not limited to the description of above-described embodiment, in the scope of claims, can do the various changes in form and details.
Claims (15)
1. there is the leakage protection circuit of operating state display and instant malfunction coefficient function, comprise power input, power output end, load end, for detecting two induction coil (L1 of leakage current and low resistance fault, L2), control chip (IC1), be built-in with the tripping coil (S0L) of iron core, controllable silicon (V4) and the major loop switch (KR2-1 linked with reset button, KR2-2), it is characterized in that: also comprise a unit switch (KR-2) linked with reset button, the dynamic contact jaw of unit switch is pressed moment in reset button and contact with the second conductive contact end (37A) and produce switch tripping coil (SOL) is formed cross through the simulation leakage current of pair induction coil to produce loop as simulating leakage current, the dynamic contact jaw of unit switch contacts measure loop tripping coil (SOL) being formed do not cross through pair induction coil as tripping coil channel selector with the first conductive contact end (35B) when reset button drives the success of major loop switch closed reduction, also be provided with double-colored display diode (LED1-R, LED1-G), the malfunction indicator lamp (LED1-R) in double-colored display diode is in parallel with tripping coil, lights when tripping coil is opened a way, working station indicator (LED1-G) in double-colored display diode is bright at the successful time point of reset through tripping coil channel selector, the dynamic contact jaw (36C) of described unit switch is connected with controllable silicon (V4) negative electrode through I-III diode (V1c), first conductive contact end (35B) of unit switch is connected with one of power input, and dynamic contact jaw (36C) keeps contacting conducting as tripping coil channel selector with the first conductive contact end (35B) after reset button drives major loop switch (KR2-1, KR2-2) closed, second conductive contact end (37A) of unit switch with through two induction coil (L1, L2) and the power input that homophase is positioned at the first conductive contact end (35B) be connected, dynamic contact jaw (36C) presses instantaneously in reset button that contacting conducting with the second conductive contact end (37A) produces switch as simulating leakage current, controllable silicon (V4) anode is connected with the power input of another out of phase through tripping coil (L3), the anode of the malfunction indicator lamp (LED1-R) in double-colored display diode is connected with tripping coil (L3) input by the 6th resistance (R6), the 3rd diode (V3), the negative electrode of malfunction indicator lamp (LED1-R) is connected with tripping coil output, the anode of working station indicator (LED1-G) is connected with the dynamic contact jaw (36C) of unit switch by the 5th resistance (R5), the second diode (V2), and the negative electrode of working station indicator (LED1-G) is connected to the power end of tripping coil output or control chip (IC1).
2. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1, it is characterized in that: the second conductive contact end (37A) and producing switch in described unit switch for forming simulation leakage current is suspended in major loop switch (KR2-1, 3rd conductive contact end (37B) of one of dynamic contact jaw KR2-2) below is connected, second conductive contact end (37A) of unit switch passes through the 3rd conductive contact end (37B) under major loop switch cut-off switch state, major loop switch (KR2-1, KR2-2) one of dynamic contact jaw is connected with corresponding power input.
3. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1; it is characterized in that: the Test Switchboard also comprising a testing button and link with testing button; one of Test Switchboard one end and power input are movably connected; the other end is connected with the power output end of out of phase by a current-limiting resistance, and power input and power output end form by Test Switchboard and current-limiting resistance the test loop producing simulation leakage current.
4. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1, it is characterized in that: the input of described tripping coil is connected with the live wire end of power input, the output of tripping coil is by current-limiting resistance (R1), I-I diode (V1a) is connected with the power end of control chip (IC1), the earth terminal of control chip is connected with the dynamic contact jaw (36C) of unit switch by the 5th diode (V5), the earth terminal of control chip is also connected with the anode of the I-I diode (V1a) introducing control chip power end by the 3rd-II diode (V3-II) being in reverse to the 5th diode (V5), the dynamic contact jaw (36C) of unit switch is connected with the power end of control chip by I-II diode (V1b), malfunction indicator lamp (LED1-R) is connected with the output of tripping coil with the common cathode of working station indicator (LED1-G).
5. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1, it is characterized in that: the dynamic contact jaw (36C) of described unit switch is connected with the input of tripping coil, first conductive contact end (35B) of unit switch is connected with the live wire end of power input, and the second conductive contact end (37A) of unit switch is connected with the live wire end of power input through two induction coil by the 3rd conductive contact end (37B) that is suspended in live wire switch (KR2-1) below of major loop switch, silicon controlled negative electrode is connected with the zero line side of power input through diode, malfunction indicator lamp (LED1-R) anode is connected with the 3rd diode (V3) negative electrode by the 6th resistance (R6), 3rd diode (V3) anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp (LED1-R) is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator (LED1-G) is connected with the negative electrode of the second diode (V2) by the 5th resistance (R5), the anode of the second diode (V2) is connected with the zero line side of power input, the negative electrode of working station indicator (LED1-G) is connected with the power end of control chip, power output end is provided with pair of conductive contact jaw with input each being connected, and all contacts conducting with the dynamic contact jaw of major loop switch when major loop switch closes, and forms the upper and lower overlap condition in contact.
6. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1, it is characterized in that: the dynamic contact jaw (36C) of described unit switch is connected with tripping coil input, first conductive contact end (35B) of unit switch is connected with the live wire end of power input, and the second conductive contact end (37A) of unit switch is connected with the live wire end of power input through two induction coil by the 3rd conductive contact end (37B) that is suspended in zero line switch (KR2-1) below of major loop switch, silicon controlled negative electrode is connected with the earth terminal of control chip, malfunction indicator lamp (LED1-R) anode is connected with the 3rd diode (V3) negative electrode by the 6th resistance (R6), 3rd diode (V3) anode is connected with the dynamic contact jaw (36C) of unit switch, the negative electrode of malfunction indicator lamp (LED1-R) is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator (LED1-G) is connected with the negative electrode of the second diode (V2) by the 5th resistance (R5), the anode of the second diode (V2) is connected with the zero line side of power input, working station indicator (LED1-G) is connected with malfunction indicator lamp (LED1-R) common cathode, negative electrode is connected with tripping coil output, power output end and load end are respectively provided with pair of conductive contact jaw, all contact conducting with the dynamic contact jaw of major loop switch, form upper and lower overlap condition when major loop switch closes.
7. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 1, it is characterized in that: the dynamic contact jaw (36C) of described unit switch is connected with the input of tripping coil, first conductive contact end (35B) of unit switch is connected with the live wire end of power input through two induction coil, and the second conductive contact end (37A) of unit switch is connected with the live wire end of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the zero line side of power input through two induction coil by a diode, malfunction indicator lamp (LED1-R) anode is connected with the 3rd diode (V3) negative electrode by the 6th resistance (R6), 3rd diode (V3) anode is connected with the dynamic contact jaw of unit switch and the input of tripping coil, the negative electrode of malfunction indicator lamp (LED1-R) is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator (LED1-G) is connected with the negative electrode of the second diode (V2) by the 5th resistance (R5), the anode of the second diode (V2) is connected with the zero line side of power input through two induction coil, the negative electrode of working station indicator (LED1-G) is connected with the power end of control chip, power output end and load end are respectively provided with pair of conductive contact jaw, have two to dynamic contact jaw corresponding with power output end and load end respectively, contact conducting respectively time closed with power output end with load end at major loop switch.
8. the leakage protection circuit with operating state display and instant malfunction coefficient function according to claim 7, it is characterized in that: the dynamic contact jaw (36C) of described unit switch is connected with silicon controlled negative electrode through diode, first conductive contact end (35B) of unit switch is connected with the zero line side of power input through two induction coil, and the second conductive contact end (37A) of unit switch is connected with the zero line side of power input, silicon controlled negative electrode is connected with control chip earth terminal and is connected with the dynamic contact jaw (36C) of unit switch by a diode, malfunction indicator lamp (LED1-R) anode is connected with the 3rd diode (V3) negative electrode by the 6th resistance (R6), 3rd diode (V3) anode is connected through two live wire end of induction coil and the input of tripping coil with power input, the negative electrode of malfunction indicator lamp (LED1-R) is connected with the output of tripping coil and silicon controlled anode, the anode of working station indicator (LED1-G) is connected with the negative electrode of the second diode (V2) by the 5th resistance (R5), the anode of the second diode (V2) is connected with the dynamic contact jaw (36C) of unit switch, the negative electrode of working station indicator (LED1-G) is finally connected with the power end of control chip, load end is drawn from power output end respective terminal.
9. the leakage protection circuit with operating state display and instant malfunction coefficient function according to any one of claim 1 to 8; it is characterized in that: also comprise one for the timer (DSQ) of timely checking circuit functional completeness; the power end (Vcc) of timer (DSQ) is connected with tripping coil output; the output (OUT) of timer (DSQ) is connected with the gate pole of controllable silicon (V4); the earth terminal of timer (DSQ) is connected with the earth terminal of control chip, is also connected with controllable silicon negative electrode.
10. the leakage protection circuit with operating state display and instant malfunction coefficient function according to any one of claim 1 to 8; it is characterized in that: the dynamic contact jaw of described major loop switch (KR2-1, KR2-2) is provided with the metal discharge sheet of a pair matched in clearance, the front end of metal discharge sheet has electric discharge cambered surface or discharge tip.
11. according to claim 1ly have operating state display and the leakage protection circuits of instant malfunction coefficient function, it is characterized in that: described unit switch moves contact jaw (36C) through the I-I diode (V1a) of the I-III diode (V1c) of Opposite direction connection, I-IV diode (V1d) that forward connects, forward connection and is connected with the power end of control chip.
12. leakage protection circuits with operating state display and instant malfunction coefficient function according to claim 1; it is characterized in that: drive major loop switch (KR2-1, KR2-2) when described reset button moves up and contact conducting with power output end and load end, the upper and lower overlapping closed load end in contact of switch (KR-3-1, KR-3-2) has power supply output services status indicator lamp to light.
13. leakage protection circuits with operating state display and instant malfunction coefficient function according to claim 1, is characterized in that: be also included in when malfunction indicator lamp (LED1-R) lights and force snap close to move to make lockhole be separated the testing button tripping and then cut off input and be connected with the power supply of output with reset guide post by mechanical structure.
14. leakage protection circuits with operating state display and instant malfunction coefficient function according to claim 1; it is characterized in that: described unit switch conductive contact end one end (35B) is suspended in the top of dynamic contact jaw (36C); the other end is connected with power input, and middle part has the discharge part (35A) forming one group of conductor that discharges with another power input matched in clearance.
15. leakage protection circuits with operating state display and instant malfunction coefficient function according to claim 13, it is characterized in that: described unit switch first conductive contact end (35B) draws the terminal that has discharge part (35A), and this terminal is connected with one of power input; Described testing button is linkedly set with a quiet contact conductor, and the terminal that quiet contact conductor one end (25B) and unit switch conductive contact end are drawn contacts conducting movably.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210377055.5A CN102931632B (en) | 2012-10-05 | 2012-10-05 | Current leakage protection circuit with working status display and real-time fault display functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210377055.5A CN102931632B (en) | 2012-10-05 | 2012-10-05 | Current leakage protection circuit with working status display and real-time fault display functions |
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| CN102931632A CN102931632A (en) | 2013-02-13 |
| CN102931632B true CN102931632B (en) | 2015-01-14 |
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| CN201210377055.5A Active CN102931632B (en) | 2012-10-05 | 2012-10-05 | Current leakage protection circuit with working status display and real-time fault display functions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106159890B (en) * | 2015-04-27 | 2019-07-26 | 施耐德电器工业公司 | Earth leakage protective device and earth leakage protecting method |
| CN107895521A (en) * | 2017-12-28 | 2018-04-10 | 山东交通学院 | Suitable for the teaching type experiment plate and experimental method of railway signal |
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| CN101562302A (en) * | 2008-04-16 | 2009-10-21 | 黄华道 | Novel earth leakage protection socket |
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| US4618907A (en) * | 1985-01-29 | 1986-10-21 | Eagle Electric Mfg. Co., Inc. | Desensitized ground fault interrupter |
| CN101562302A (en) * | 2008-04-16 | 2009-10-21 | 黄华道 | Novel earth leakage protection socket |
| CN102157916A (en) * | 2010-02-12 | 2011-08-17 | 黄华道 | Electric leakage detection and protection circuit |
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| CN102931632A (en) | 2013-02-13 |
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