CN108306257A - Three pole break-make leakage protecting plug of intelligent control type - Google Patents
Three pole break-make leakage protecting plug of intelligent control type Download PDFInfo
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- CN108306257A CN108306257A CN201810303326.XA CN201810303326A CN108306257A CN 108306257 A CN108306257 A CN 108306257A CN 201810303326 A CN201810303326 A CN 201810303326A CN 108306257 A CN108306257 A CN 108306257A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 66
- 230000005611 electricity Effects 0.000 claims abstract description 32
- 230000001276 controlling effect Effects 0.000 claims abstract description 21
- 230000005669 field effect Effects 0.000 claims description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000006837 decompression Effects 0.000 claims description 3
- 230000006698 induction Effects 0.000 description 13
- 238000012544 monitoring process Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 7
- 238000011084 recovery Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 101000611618 Homo sapiens Photoreceptor disk component PRCD Proteins 0.000 description 1
- 102100040826 Photoreceptor disk component PRCD Human genes 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
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Abstract
The present invention relates to a kind of three pole break-make leakage protecting plugs of intelligent control type, including DC power supply circuit and leakage protection circuit；Feature be further include D.C. regulated power supply, single chip machine controlling circuit and relay switching circuit；Single chip machine controlling circuit includes control chip and storaging chip, and the output end of leakage protection circuit is electrically connected with the input terminal of control chip；Relay switching circuit includes the relay and driving switch circuit of three groups of normally opened contacts of band, the both ends of relay are electrically connected with the output end of the output end of D.C. regulated power supply and driving switch circuit respectively, its three groups of normally opened contacts are connected on respectively on firewire L, zero curve N and ground wire E, and the input terminal of driving switch circuit is electrically connected with the output end of control chip.Its advantage is：Such as there is leak current fault and meet with single-phase power failure again, firewire, zero curve and three pole power supply of ground connection all can be cut off immediately, after circuit restores electricity, as long as no leak current fault, original reset working condition will be automatically restored to, disclosure satisfy that national standard.
Description
Technical field
The present invention relates to a kind of three pole break-make leakage protecting plugs of intelligent control type.
Background technology
Common leakage protecting plug（PRCD）Typically monitoring circuit is coordinated to control zero curve with mechanical release device
N, the three pole on/offs of firewire L and ground connection E, because being all residual current acting type trip gear, so there is electric leakage event
When barrier, if without shock current, the power-off that would not thread off is protected in leakage;So in the case where resetting working condition, once there is electric leakage event
Hinder and no electrics shock thread off power-off before, and meet with it is single-phase power failure as use the single-phase power-off of switch socket situation, leakage guarantor
Control circuit will because lose the job power supply without thread off trip, i.e., cannot cut off three pole power supplys immediately, thus there is also
Some potential safety problems；Currently, have one kind in the case where resetting working condition, once occur leak current fault meet with again it is single-phase have a power failure or
Using the situation of the single-phase power-off of switch socket, the leakage protecting plug that can be cut off the power, but its it is impossible to meet low-voltages
The national standard of work, quiescent dissipation is too big, too complicated etc. many defects of circuit.
Invention content
It is extremely logical that a kind of safer intelligent control type three is provided the purpose of the present invention is overcome the deficiencies in the prior art
Disconnected leakage protecting plug, the leakage are protected in the case where resetting working condition, leak current fault are such as occurred and are met with single-phase power failure again or opened using band
The situation for closing the single-phase power-off of socket can be stood and all cut off three pole power supplys of firewire, zero curve and ground connection, and circuit restores electricity
Afterwards, as long as no leak current fault, original reset working condition will be automatically restored to, disclosure satisfy that national standard, additionally it is possible to
Meet the national standard to work under low-voltage AC50V states.
In order to achieve the above object, the invention is realized in this way, it is a kind of three pole break-make electric leakage guarantor of intelligent control type
Protect plug, including DC power supply circuit and leakage protection circuit；The input terminal of the DC power supply circuit is electrically connected with city's alternating current
It connects, the output end of DC power supply circuit provides working power for leakage protection circuit；Characterized by further comprising DC voltage-stabilizing electricity
Source, single chip machine controlling circuit and relay switching circuit, the output end of rectification circuit and the input terminal of D.C. regulated power supply are electrically connected
It connects；The single chip machine controlling circuit includes control chip and storaging chip, and reset switch, control are equipped on the control chip
Chip is electrically connected with storaging chip, and the control chip can transfer the signal of storaging chip storage, the leakage protection circuit
Output end with control chip input terminal be electrically connected；The relay switching circuit includes the relay of three groups of normally opened contacts of band
And driving switch circuit, one end of the relay are electrically connected to obtain DC operation electricity with the output end of D.C. regulated power supply
The other end in source, relay is electrically connected with the output end of driving switch circuit, and three groups of normally opened contacts of relay are connected on respectively
On firewire L, zero curve N and ground wire E, the input terminal of the driving switch circuit is electrically connected with the output end of control chip；It is described straight
Chip and storaging chip provide DC supply to the output end of stream regulated power supply in order to control.
In the technical scheme, the D.C. regulated power supply includes the first D.C. regulated power supply and the second DC voltage-stabilizing electricity
Source；The input terminal of first D.C. regulated power supply receives the rectified voltage of rectification circuit output and carries out voltage stabilizing output, described
Second D.C. regulated power supply receives the DC voltage of the first D.C. regulated power supply output and carries out decompression and voltage stabilizing；Described first is straight
The output end of stream regulated power supply is electrically connected to obtain DC supply with one end of relay；The second DC voltage-stabilizing electricity
Chip and storaging chip provide DC supply in order to control in source.
In the technical scheme, first D.C. regulated power supply includes field-effect tube, the second zener diode, the second electricity
Appearance and first resistor；The output end of the rectification circuit is electrically connected with one end of the drain electrode of field-effect tube and first resistor respectively,
The other end of first resistor is electrically connected with the cathode of the grid of field-effect tube and the second zener diode respectively, two pole of the second voltage stabilizing
The plus earth of pipe, one end of the second capacitance are electrically connected with the source electrode of field-effect tube, the other end ground connection, the source electrode of field-effect tube with
One end of relay is electrically connected to obtain DC supply；Second D.C. regulated power supply includes two pole of the first voltage stabilizing
Pipe, third capacitance and second resistance；First zener diode and third capacitance are parallel with one another, and the anode of the first zener diode connects
The cathode on ground, the first zener diode is electrically connected by second resistance with the source electrode of field-effect tube, the moon of the first zener diode
The extremely output end of the second D.C. regulated power supply.
In the technical scheme, further include a diode, the both ends of this diode are attempted by the both ends of relay
And the cathode of diode is electrically connected with the output end of the first D.C. regulated power supply；The driving switch circuit includes switching transistor
And the 5th capacitance, the base stage of the switching transistor are electrically connected by the 7th resistance with the output end of control chip, three pole of switch
The collector of pipe is electrically connected with the other end of relay, the emitter ground connection of switching transistor；5th capacitance is attempted by out
Between the base stage and emitter of closing triode.
In the technical scheme, the model of the control chip is SN8P2711, shares 14 pins；The storaging chip
Model be AT24C02, share 8 pins；The both ends of the reset switch are electrically connected with 2 feet of control chip and 14 feet respectively
It connects, between 12 feet and 14 feet of control chip and is connected to the 6th capacitance, 12 feet for controlling chip are leak current fault signal IΔnIt is defeated
Enter end, 10 feet for controlling chip are drive outputs, and 8 feet for controlling chip are water-flow signal input terminals, and GL is flow perceptron
Connector socket, the 6th resistance is electrically connected with the output end of the second D.C. regulated power supply, and DC operation is provided for flow perceptron
Power supply, 4 feet for controlling chip are electrically connected by the 5th resistance with the output end of the second D.C. regulated power supply, and 3 feet of chip are controlled
It is electrically connected with the output end of the second D.C. regulated power supply by the 4th resistance, controls 1 foot and the second D.C. regulated power supply of chip
Output end electrical connection；8 feet of storaging chip are electrically connected with 1 foot of control chip, 6 feet of storaging chip and the 3 of control chip
Foot is electrically connected, and 5 feet of storaging chip are electrically connected with 4 feet of control chip, and 1 to 4 foot and 7 feet of storaging chip are grounded, and the 4th
The both ends of capacitance are electrically connected with 4 feet of storaging chip and 7 feet respectively.
The present invention compared with prior art the advantages of be：In the case where resetting working condition, such as there is leak current fault and meet with list again
The mutually situation of power failure or the single-phase power-off using switch socket, can be whole by firewire, zero curve and three pole power supplys of ground connection immediately
Cut-out, after circuit restores electricity, as long as no leak current fault, will automatically restore to original reset working condition, Neng Gouman
Sufficient national standard, additionally it is possible to meet the national standard to work under low-voltage AC50V states；In addition, also adding water outlet power-off
Function will be automatically cut off the power at once as long as water flow switch senses the flowing of water, and after flow stops, and automatic recovery supplies
Electricity, use are more convenient and safe.
Description of the drawings
Fig. 1 is the circuit diagram of the present invention.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings.It should be noted that for these
The explanation of embodiment is used to help understand the present invention, but does not constitute limitation of the invention.In addition, sheet disclosed below
Inventing technical characteristic involved in each embodiment can be combined with each other as long as they do not conflict with each other.
In the description of the present invention, term " first " to " the 11st " is used for description purposes only, and should not be understood as indicating
Or imply relative importance.
As shown in Figure 1, it is a kind of three pole break-make leakage protecting plug of intelligent control type, including rectification circuit 1, DC voltage-stabilizing electricity
Source, single chip machine controlling circuit 3, relay switching circuit 4 and leakage protection circuit 5；Wherein, the input terminal of the rectification circuit 1
It is electrically connected with city's alternating current, the output end of rectification circuit 1 is that leakage protection circuit 5 provides working power, the output of rectification circuit 1
End is electrically connected with the input terminal of D.C. regulated power supply；The single chip machine controlling circuit 3 includes control chip IC 2 and storaging chip
IC3, is equipped with reset switch RESET in the control chip IC 2, and control chip IC 2 passes through data line electricity with storaging chip IC3
Connection, the control chip IC 2 can transfer the signal of storaging chip IC3 storages, the output end of the leakage protection circuit 5 and control
The input terminal of coremaking piece IC2 is electrically connected；The relay switching circuit 4 includes the relay JK and driving of three groups of normally opened contacts of band
One end of switching circuit, the relay JK is electrically connected with the output end of D.C. regulated power supply to obtain DC supply,
The other end of relay JK is electrically connected with the output end of driving switch circuit, and such driving switch circuit can also obtain direct current work
Make power supply；Three groups of normally opened contacts of relay JK are connected on respectively on firewire L, zero curve N and ground wire E, the driving switch circuit
Input terminal with control chip IC 2 output end be electrically connected；The output end of the D.C. regulated power supply chip IC 2 and is deposited in order to control
It stores chip IC 3 and DC supply is provided.When work, when leakage protection circuit 5 has electric leakage signal IΔnWhen output, chip is controlled
The input terminal of IC2 receives the signal I of the output of leakage protection circuit 5ΔnAfter handled, and will treated signal difference it is defeated
Go out to driving switch circuit and storaging chip IC3, driving switch circuit disconnects, relay JK dead electricity, and three groups of normally opened contacts restore
Reset condition disconnects, and to cut off power supply, plays the role of protecting personal safety, memory 8 that microcontroller is controlled electricity
The signal that road 7 inputs is stored；After leak current fault excludes, D.C. regulated power supply is respectively single chip machine controlling circuit 3 and leakage
Electric protection circuit 5 provides direct-current working volts, presses reset switch RESET, controls 2 output signal of chip IC, driving switch electricity
Road is connected, and relay JK obtains electric, and the conducting of three groups of normally opened contacts restores electricity state, because of the work electricity of relay and control circuit
Source is provided by regulated power supply, and under low-voltage AC50V states, rectification circuit 1 and D.C. regulated power supply still can be with
Operating voltage is provided, single chip machine controlling circuit 3, relay switching circuit 4 and leakage protection circuit 5 is made to work as usual, so this
Technical solution has fully met national standard.
In the present embodiment, the D.C. regulated power supply includes the first D.C. regulated power supply 1 and the second D.C. regulated power supply
2；The input terminal of first D.C. regulated power supply 21 receives the rectified signal that rectification circuit 1 exports and simultaneously carries out voltage stabilizing, and described the
Two D.C. regulated power supplies 2 receive the DC voltage of the first D.C. regulated power supply 1 output and carry out decompression and voltage stabilizing, and such second is straight
It is more stable to flow the DC voltage that regulated power supply 2 exports；First D.C. regulated power supply 1 is relay JK and driving switch circuit
DC supply is provided；Chip IC 2 and storaging chip IC3 provide DC operation to second D.C. regulated power supply 2 in order to control
Power supply.
In the present embodiment, further include diode D2, the both ends of the diode D2 be attempted by the both ends of relay JK and
The cathode of diode D2 is electrically connected with the output end of the first D.C. regulated power supply 1, absorbs what relay coil generated for short circuit
Inverse peak voltage protects switching transistor Q2 and other elements not to be impacted by inverse peak voltage；The driving switch circuit packet
Switching transistor Q2 and the 5th capacitance C5 is included, the base stage of the switching transistor Q2 passes through the 7th resistance R7 and control chip IC 2
Output end electrical connection, the collector of switching transistor Q2 is electrically connected with the other end of relay JK, the hair of switching transistor Q2
Emitter grounding；The 5th capacitance C5 is attempted by between the base stage and emitter of switching transistor Q2, for bypassing high-frequency electromagnetic
Interference signal.When work, when 12 feet of control chip IC 2 receive electric leakage signal IΔnWhen, control chip IC 2 exports immediately gives
The base stage low level signal of switching transistor Q2, switching transistor Q2 are disconnected, relay JK dead electricity, three groups of normally opened contacts disconnect from
And power supply is cut off and will not automatic recovery of power supply；After leak current fault excludes, reset switch RESET is pressed, controls chip IC 2
Export high level signal, switching transistor Q2 conducting to the base stage of switching transistor Q2, relay JK obtain it is electric, the three of relay JK
Group normally opened contact conducting continues as load supplying.
In the present embodiment, the model of the control chip IC 2 is SN8P2711, shares 14 pins；The storage core
The model of piece IC3 is AT24C02, shares 8 pins；The both ends of the reset switch RESET respectively with control chip IC 22
Foot and the electrical connection of 14 feet between 12 feet and 14 feet of control chip IC 2 and are connected to the 6th capacitance C6, are used for bypass absorption high frequency
12 feet of electromagnetic interference signal, control chip IC 2 are leak current fault signal IΔn10 feet of input terminal, control chip IC 2 are drivings
8 feet of output end, control chip IC 2 are water-flow signal input terminals, and GL is the connector socket of flow perceptron, the 6th resistance R6 with
The output end of second D.C. regulated power supply 2 is electrically connected, and is provided DC supply for flow perceptron, is controlled 4 feet of chip IC 2
It is electrically connected with the output end of the second D.C. regulated power supply 2 by the 5th resistance R5,3 feet of control chip IC 2 pass through the 4th resistance
R4 is electrically connected with the output end of the second D.C. regulated power supply 2, controls the output of 1 foot and the second D.C. regulated power supply 2 of chip IC 2
End electrical connection；8 feet of storaging chip IC3 are electrically connected with 1 foot of control chip IC 2,6 feet and the control chip of storaging chip IC3
3 feet of IC2 are electrically connected, and 5 feet of storaging chip IC3 are electrically connected with 4 feet for controlling chip IC 2,1 to 4 foot of storaging chip IC3 and
7 feet are grounded, and the both ends of the 4th capacitance C4 are electrically connected with 4 feet of storaging chip IC3 and 8 feet respectively, for bypassing High-frequency Interference
Signal, power conditioner.When work, reset switch RESET is pressed, 10 feet for controlling chip IC 2 are inverted by low potential and protected always
Hold high potential, relay JK obtains electric, and switching transistor Q2 conductings, three groups of normally opened contacts conductings provide alternating current for load appliance
Source；In normal operation, if encounter power failure phenomenon, the first D.C. regulated power supply 1 and the second D.C. regulated power supply 2 lose
Electricity, controls chip IC 2 and relay JK dead electricity, three groups of normally opened contacts disconnect immediately；When power is restored, as long as no electric leakage event
Barrier, the first D.C. regulated power supply 1 and the second D.C. regulated power supply 2 it is electric, relay JK obtains electric, and control chip IC 2 receives immediately
The normal work signal of storage chip IC3 storages, 10 feet of control chip IC 2 are inverted by low potential and are always maintained at high potential,
Switching transistor Q2 conductings, three groups of normally opened contact automatic pick conductings are restored to powered operation state.In addition in normal power supply shape
Under state, when 8 feet of control chip IC 2 sense the stream impulse signal of flow perceptron GL outputs, 10 feet of chip IC 2 are controlled
Low potential is reversed to by high potential, switching transistor Q2 is disconnected, and relay JK dead electricity, three groups of normally opened contacts disconnect stopping and supply immediately
Electricity；After the stream impulse blackout of flow perceptron GL, control chip IC 2 is delayed several seconds（The specific time is voluntarily arranged）
Afterwards, 10 feet of control chip IC 2 are reversed to high potential by low potential again, switching transistor Q2 conductings, relay JK obtain it is electric, three groups
Normally opened contact is attracted recovery and powers to load appliance again.When there is leak current fault, the output end of leakage protection circuit 5 will incite somebody to action
Leak current fault signal IΔn12 feet of control chip IC 2 are input to, 10 foot of drive output for controlling chip IC 2 is anti-by high potential
Switch to low potential, switching transistor Q2 is disconnected, relay JK dead electricity, and three groups of normally opened contacts disconnect stopping power supply immediately, if at this time
The situation for having a power failure and then restoring electricity again is met with, because control chip IC 2 is controlled by the leakage condition memory signal of storage chip IC3
Switching transistor Q2 is given without exporting reverse signal, so relay JK just then locate always always by dead electricity, three groups of normally opened contacts
It will not automatic pick in off-state；It has to manually press reset switch RESET again, will be stored by controlling chip IC 2
After the leakage condition memory signal of chip IC 3 is reset, as long as leak current fault has excluded, controlling 10 feet of chip IC 2 just can be by
Low potential inverts and is always maintained at high potential, and relay JK obtains electric, switching transistor Q2 conductings, three groups of normally opened contact conducting recoveries
Power supply state.
In the present embodiment, the rectification circuit 1 includes rectifier diode D1,3rd resistor R3, the first capacitance C1 and the
Seven capacitance C7, the first capacitance C1 and the 7th capacitance C7 are power filtering capacitor；The rectifier diode D1,3rd resistor
R3 and the 7th capacitance C7 are sequentially connected in series, and the anode of rectifier diode D1 is electrically connected with firewire L, and the positive terminal of the 7th capacitance C7 is leakage
Electric protection circuit 5 provides working power, the negative pole end ground connection of the 7th capacitance C7；The anode of the first capacitance C1 connects two pole of rectification
The cathode of the cathode of pipe D1, the first capacitance C1 meets zero curve N.
In the present embodiment, first D.C. regulated power supply 1 includes field-effect tube Q1, the second zener diode DW2, the
Two capacitance C2 and first resistor R1, the second capacitance C2 are electrolytic capacitor；The cathode of the rectifier diode D1 respectively with field
The electrical connection of one end of the drain electrode of effect pipe Q1 and first resistor R1, the other end of first resistor R1 grid with field-effect tube Q1 respectively
The cathode of pole and the second zener diode DW2 are electrically connected, the plus earth of the second zener diode DW2, the second capacitance C2
Positive terminal be electrically connected with the source electrode of field-effect tube Q1, the negative pole end of the second capacitance C2 ground connection, the source electrode of field-effect tube Q1 be after
Electric appliance JK and driving switch circuit provide DC supply；Second D.C. regulated power supply 2 includes the first zener diode
DW1, third capacitance C3 and second resistance R2；Third capacitance C3 is electrolytic capacitor；The first zener diode DW1, third electricity
Holding C3 and the 4th capacitance C4 to be mutually in parallel, the anode of the first zener diode DW1 and the negative pole end of third capacitance C3 are grounded, the
The cathode of one zener diode DW1 passes through the source electrode of the second current-limiting resistance R2 and the field-effect tube Q1 of the first D.C. regulated power supply electricity
Connection, the cathode of the first zener diode DW1 are the output end of the second D.C. regulated power supply 2；When work, the first zener diode
Operating voltage values of the DW1 by the power good after second resistance R2 current limlitings needed for single chip machine controlling circuit.
In the present embodiment, the leakage protection circuit 5 include the first induction coil ZCT1, the second induction coil ZCT2,
Test switch TEST, the 8th capacitance C8 to the 14th capacitance C14, the 8th resistance R8, the tenth resistance R10 of the 9th resistance R9, the tenth
One resistance R11 and leak current fault monitor ic chip 1；The leak current fault monitoring ic chip 1 has 8 feet and two inputs
End, 1 foot and 2 feet of leak current fault monitoring ic chip 1 are the first input end of leakage protection circuit 5, leak current fault monitoring collection
2 feet and 3 feet of blocking IC1 are the second input terminals of leakage protection circuit 5, and 7 feet of leak current fault monitoring ic chip 1 are electric leakages
The output end of circuit 5,4 feet of leak current fault monitoring ic chip 1 is protected to meet zero curve N；Distinguish at the both ends of the 9th capacitance C9
Monitor 6 feet of ic chip 1 with leak current fault and 7 feet be electrically connected, the both ends of the 11st capacitance C11 respectively with leak current fault
4 feet and the electrical connection of 5 feet of ic chip 1 are monitored, the both ends of the tenth capacitance C10 monitor integrated package with leak current fault respectively
7 feet of IC1 and the electrical connection of 4 feet, leak current fault monitor the 4 feet ground connection of ic chip 1；Leak current fault monitors 8 feet of ic chip 1
It is electrically connected with the other end of 3rd resistor R3, direct-current working volts is provided to monitor ic chip 1 for leak current fault；Described
7 feet that eight resistance R8 monitor ic chip 1 with one end after the 8th capacitance C8 parallel connections with leak current fault are electrically connected, the other end and control
12 feet of chip IC 2 are electrically connected, thus by leak current fault signal IΔnIt is input to 12 feet of control chip IC 2, the 9th capacitance
The both ends of C9 monitor 6 feet of ic chip 1 with leak current fault respectively and 7 feet are electrically connected；The electricity of the 12nd capacitance C12 and the tenth
The both ends for hindering R10 monitor 1 foot of ic chip 1 with leak current fault respectively and 2 feet are electrically connected；The 13rd capacitance C13 and
The both ends of 11 resistance R11 monitor 3 feet of ic chip 1 with leak current fault respectively and 2 feet are electrically connected；14th capacitance
One end of C14 is electrically connected with 2 feet of control chip IC 2, other end ground connection；The first induction coil ZCT1 is set in firewire L
And on zero curve N, the both ends of first group of coil of the first induction coil ZCT1 monitor 1 foot of ic chip 1 with leak current fault respectively
And 2 foot electrical connections, one end of second group of coil of the first induction coil ZCT1 concatenate after the 9th current-limiting resistance R9 with test switch
Electrical connection, the other end are electrically connected with firewire L；Another terminal connecting zero line N of the test switch TEST, second induction coil
ZCT2 is set on ground wire E, and 3 feet and 2 feet of the both ends of the second induction coil ZCT2 and leak current fault monitoring ic chip 1 are electrically connected
It connects；When work, when the first induction coil ZCT1 or the second induction coil ZCT2 sense leak current fault signal IΔnWhen, electric leakage event
The leak current fault signal that barrier monitoring ic chip 1 immediately senses the first induction coil ZCT1 or the second induction coil ZCT2
IΔn12 feet of control chip IC 2 are input to after being amplified processing, and pass through the 7th electricity again after the control processing of chip IC 2
Resistance is input to the base stage of switching transistor Q2, and switching transistor Q2 is disconnected, relay JK dead electricity, and three groups of relay JK are normally opened tactile
Point disconnects cutting off the power immediately, to achieve the purpose that protect personal safety；After leak current fault excludes, it must press again multiple
Bit switch RESET is leaked by controlling chip IC 2 by after the leakage condition memory signal clearing of storage chip IC3 as long as being not present
10 feet of electric fault, control chip IC 2 will be inverted by low potential and be always maintained at high potential, and relay JK obtains electric, switch three
Pole pipe Q2 conductings, three groups of normally opened contact conductings restore to connect alternating current to load appliance.When detection, when pressing test switch
Second group of coil of TEST, the first induction coil ZCT1 obtain signal, and first group of coil of the first induction coil ZCT1 is by the letter
It number is input to leak current fault monitoring ic chip 1, the electric leakage signal sensed is amplified by leak current fault monitoring ic chip 1
12 feet for handling and being input to control chip IC 2 are input to switch after control chip IC 2 is handled again further through the 7th resistance
The base stage of triode Q2, switching transistor Q2 are disconnected, and relay JK dead electricity, three groups of normally opened contacts of relay JK are extensive to break immediately
It opens, has achieved the purpose that detect leakage protecting plug working condition.
Embodiments of the present invention are explained in detail above in association with attached drawing, but the present invention is not limited to described reality
Apply mode.For the ordinary skill in the art, without departing from the principle and spirit of the present invention to these
Embodiment carries out a variety of variations, modification, replacement and deformation and still falls within the scope of the present invention.
Claims (5)
1. a kind of three pole break-make leakage protecting plug of intelligent control type, including DC power supply circuit（1）And leakage protection circuit
（5）；The DC power supply circuit（1）Input terminal be electrically connected with city's alternating current, DC power supply circuit（1）Output end be electric leakage
Protect circuit（5）Working power is provided；Characterized by further comprising D.C. regulated power supply, single chip machine controlling circuits（3）And relay
Device switching circuit（4）, rectification circuit（1）Output end be electrically connected with the input terminal of D.C. regulated power supply；The microcontroller control
Circuit（3）Including controlling chip（IC2）And storaging chip（IC3）, in the control chip（IC2）It is equipped with reset switch
（RESET）, control chip（IC2）With storaging chip（IC3）Electrical connection, the control chip（IC2）Storaging chip can be transferred
（IC3）The signal of storage, the leakage protection circuit（5）Output end with control chip（IC2）Input terminal electrical connection；It is described
Relay switching circuit（4）Including three groups of normally opened contacts of band（JK）Relay and driving switch circuit, the relay（JK）
One end be electrically connected to obtain DC supply, relay with the output end of D.C. regulated power supply（JK）The other end and drive
The output end electrical connection of dynamic switching circuit, relay（JK）Three groups of normally opened contacts be connected on firewire L, zero curve N and ground wire E respectively
On, input terminal and the control chip of the driving switch circuit（IC2）Output end electrical connection；The D.C. regulated power supply it is defeated
Outlet chip in order to control（IC2）And storaging chip（IC3）DC supply is provided.
2. three pole break-make leakage protecting plug of intelligent control type according to claim 1, it is characterised in that the direct current is steady
Voltage source includes the first D.C. regulated power supply（21）And second D.C. regulated power supply（22）；First D.C. regulated power supply（21）
Input terminal receive rectification circuit（1）The rectified voltage of output simultaneously carries out voltage stabilizing output, second D.C. regulated power supply（22）
Receive the first D.C. regulated power supply（21）The DC voltage of output simultaneously carries out decompression and voltage stabilizing；First D.C. regulated power supply
（21）Output end and relay（JK）One end be electrically connected to make relay（JK）Obtain DC supply；Described second
D.C. regulated power supply（2）Chip in order to control（IC2）And storaging chip（IC3）DC supply is provided.
3. three pole break-make leakage protecting plug of intelligent control type according to claim 2, it is characterised in that described first is straight
Flow regulated power supply（21）Including field-effect tube（Q1）, the second zener diode（DW2）, the second capacitance（C2）And first resistor
（R1）；The rectification circuit（1）Output end respectively with field-effect tube（Q1）Drain electrode and first resistor（R1）One end be electrically connected
It connects, first resistor（R1）The other end respectively with field-effect tube（Q1）Grid and the second zener diode（DW2）Cathode electricity
Connection, the second zener diode（DW2）Plus earth, the second capacitance（C2）One end and field-effect tube（Q1）Source electrode be electrically connected
It connects, other end ground connection, field-effect tube（Q1）Source electrode and relay（JK）One end be electrically connected to obtain DC supply；
Second D.C. regulated power supply（22）Including the first zener diode（DW1）, third capacitance（C3）And second resistance（R2）；The
One zener diode（DW1）With third capacitance（C3）Mutually it is in parallel, the first zener diode（DW1）Plus earth, first is steady
Press diode（DW1）Cathode pass through second resistance（R2）With field-effect tube（Q1）Source electrode electrical connection, the first zener diode
（DW1）Cathode be the second D.C. regulated power supply（2）Output end.
4. three pole break-make leakage protecting plug of intelligent control type according to claim 1, it is characterised in that further include two poles
Pipe（D2）, the diode（D2）Both ends be attempted by relay（JK）Both ends and diode（D2）Cathode and the first direct current
Regulated power supply（1）Output end electrical connection；The driving switch circuit includes switching transistor（Q2）And the 5th capacitance（C5）, institute
State switching transistor（Q2）Base stage pass through the 7th resistance（R7）With control chip（IC2）Output end electrical connection, three pole of switch
Pipe（Q2）Collector and relay（JK）The other end electrical connection, switching transistor（Q2）Emitter ground connection；Described 5th
Capacitance（C5）It is attempted by switching transistor（Q2）Base stage and emitter between.
5. three pole break-make leakage protecting plug of intelligent control type according to claim 1 or 2, it is characterised in that the control
Chip（IC2）Model be SN8P2711, share 14 pins；The storaging chip（IC3）Model be AT24C02, share 8
Pin；The reset switch（RESET）Both ends respectively with control chip（IC2）2 feet and 14 feet electrical connection, control core
Piece（IC2）12 feet and 14 feet between and be connected to the 6th capacitance（C6）, control chip（IC2）12 feet be leak current fault signal
IΔnInput terminal controls chip（IC2）10 feet be drive output, control chip（IC2）8 feet be water-flow signal input terminal,
GL is the connector socket of flow perceptron, the 6th resistance（R6）With the second D.C. regulated power supply（2）Output end electrical connection, be water
It flows perceptron and DC supply is provided, control chip（IC2）4 feet pass through the 5th resistance（R5）With the second D.C. regulated power supply
（2）Output end electrical connection, control chip（IC2）3 feet pass through the 4th resistance（R4）With the second D.C. regulated power supply（2）It is defeated
Outlet is electrically connected, and controls chip（IC2）1 foot and the second D.C. regulated power supply（2）Output end electrical connection；Storaging chip
（IC3）8 feet with control chip（IC2）1 foot electrical connection, storaging chip（IC3）6 feet with control chip（IC2）3 feet electricity
Connection, storaging chip（IC3）5 feet with control chip（IC2）4 feet electrical connection, storaging chip（IC3）1 to 4 foot and 7 feet
It is grounded, the 4th capacitance（C4）Both ends respectively with storaging chip（IC3）4 feet and 7 feet electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810303326.XA CN108306257A (en) | 2018-04-07 | 2018-04-07 | Three pole break-make leakage protecting plug of intelligent control type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810303326.XA CN108306257A (en) | 2018-04-07 | 2018-04-07 | Three pole break-make leakage protecting plug of intelligent control type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108306257A true CN108306257A (en) | 2018-07-20 |
Family
ID=62848149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810303326.XA Pending CN108306257A (en) | 2018-04-07 | 2018-04-07 | Three pole break-make leakage protecting plug of intelligent control type |
Country Status (1)
| Country | Link |
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| CN (1) | CN108306257A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110739589A (en) * | 2018-07-21 | 2020-01-31 | 佛山市顺德区信辉达电子有限公司 | Intelligent leakage protection plug with leakage protection function failure re-protection function |
| CN111426865A (en) * | 2020-04-03 | 2020-07-17 | 珠海市联电科技有限公司 | PT intelligent blocking device and method for power line |
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| CN111426865B (en) * | 2020-04-03 | 2022-05-17 | 珠海市联电科技有限公司 | PT intelligent blocking device and method for power line |
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Application publication date: 20180720 |
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