CN208849175U - With creepage protection function failure again defencive function Intelligent electric leakage protect plug - Google Patents
With creepage protection function failure again defencive function Intelligent electric leakage protect plug Download PDFInfo
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- CN208849175U CN208849175U CN201821158285.1U CN201821158285U CN208849175U CN 208849175 U CN208849175 U CN 208849175U CN 201821158285 U CN201821158285 U CN 201821158285U CN 208849175 U CN208849175 U CN 208849175U
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Abstract
Plug is protected the utility model relates to a kind of Intelligent electric leakage with creepage protection function failure defencive function again, including DC power supply circuit, hookup, leak current fault induction coil and leak current fault monitor circuit；The output end of leak current fault induction coil is electrically connected with the input terminal of leak current fault monitoring circuit；Feature be further include relay switching circuit, single chip machine controlling circuit and creepage protection function monitoring circuit；Single chip machine controlling circuit includes control chip and storaging chip, is equipped with reset switch on control chip；Relay switching circuit includes the relay and driving switch circuit of three groups of normally opened contacts of band, and three groups of normally opened contacts of relay are with being serially connected in L fire, N zero and PE respectively in three pole power supplys.Its failure that can monitor leakage protection circuit can automatically cut off the power simultaneously warning note, have power-failure memory and power-off protection function, additionally it is possible to meet the national standard of low-voltage AC50V work, securely and reliably when creepage protection function failure.
Description
Technical field
The utility model relates to it is a kind of with creepage protection function failure again defencive function Intelligent electric leakage protect plug.
Background technique
Common leakage protecting plug (PRCD) is general all without power-off protection function, when leak current fault occur and meet with again
Situation of the single-phase power failure as used switch socket is met, leakage protects control circuit and is unable to tripping cutting L fire, N because losing power supply
Three pole power supplys of the ground zero and PE, so there is also some potential safety problemss；It is existing a to meet with single-phase stop again when there is leak current fault
When electric, the intelligent leakage protecting plug for the three pole power supplys of cutting that can thread off, but it can not work in AC50V low-voltage,
So can not meet national standard, and that there is also intelligence degrees is low, and quiescent dissipation is too big, and circuit complexity etc. much lacks
It falls into, in addition there are no the precautionary measures of creepage protection function failure, if encountering leakage protection circuit because the failures such as component cause
When defencive function fails, cannot trip power-off, so there is also some potential safety problemss.
Summary of the invention
The utility model aim is overcome the deficiencies in the prior art and provides a kind of band creepage protection function failure and protect again
The Intelligent electric leakage of function protects plug, can monitor the failure of leakage protection circuit, can be certainly when creepage protection function failure
Dynamic simultaneously warning note of cutting off the power, and there is power-failure memory and power-off protection function, additionally it is possible to meet low-voltage AC50V work
National standard；In addition, there are also functions, the uses such as water outlet power-off and overtemperature prote more intelligently to facilitate, securely and reliably.
In order to achieve the above object, the utility model is realized in this way, be a kind of failure of band creepage protection function again
The Intelligent electric leakage of defencive function protects plug, including DC power supply circuit, hookup, leak current fault induction coil and electric leakage event
Barrier monitoring circuit；The DC power supply circuit monitors circuit for leak current fault and following circuits provide DC supply, described
The output end of leak current fault induction coil is electrically connected with the input terminal of leak current fault monitoring circuit；Characterized by further comprising relays
Device switching circuit, single chip machine controlling circuit and creepage protection function monitor circuit；The single chip machine controlling circuit includes control core
Piece and storaging chip, the control chip periphery circuit are equipped with reset switch, and control chip is electrically connected with storaging chip, the control
The control signal of coremaking piece can be deposited and be transferred by storaging chip, the output end of the leak current fault monitoring circuit and control
The input terminal of chip is electrically connected；The relay switching circuit includes the relay and driving switch electricity of three groups of normally opened contacts of band
Road, one end of the relay are electrically connected to obtain DC supply with the output end of D.C. regulated power supply, relay
The other end is electrically connected with the output end of driving switch circuit, and three groups of normally opened contacts of relay are serially connected in L fire, N zero and PE respectively
In three pole power supply of ground, the input terminal of the driving switch circuit is electrically connected with the output end of control chip；The earth leakage protective function
The input terminal that circuit can be monitored is protected Function detection signal output end with the leakage of control chip and is electrically connected, creepage protection function monitoring electricity
The leakage of road output protects Function detection signal and is input to hookup, and functional model of reduction signal is protected in the leakage that creepage protection function monitors circuit
Input terminal is protected functional model of reduction signal output end with the leakage of control chip and is electrically connected, and function is protected in the leakage that creepage protection function monitors circuit
Recovering signal output end is electrically connected with the power input of leak current fault monitoring circuit.
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；Second D.C. regulated power supply receives the DC voltage of the first D.C. regulated power supply output and carries out decompression and pressure stabilizing；Institute
Stating first D.C. regulated power supply is switching regulator BUCK power supply, the output end of the first D.C. regulated power supply and one end of relay
One end electrical connection with current-limiting resistance obtains DC supply to make relay and leak current fault monitor circuit；Described second
D.C. regulated power supply provides DC operation electricity for the detection circuit that control chip, storaging chip and creepage protection function monitor circuit
Source.
In the technical scheme, first D.C. regulated power supply is switching regulator BUCK power supply.
It in the technical scheme, further include the 4th diode, the both ends of the 4th diode are attempted by the two of relay
The cathode of end and the 4th diode is electrically connected with the output end of the first D.C. regulated power supply；The driving switch circuit includes first
The base stage of switching transistor and the 4th capacitor, the first switch triode is defeated by eleventh resistor and the driving of control chip
Outlet electrical connection, the collector of first switch triode are electrically connected with the other end of relay, the transmitting of first switch triode
Pole ground connection；4th capacitor is attempted by between the base stage and emitter of first switch 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 third capacitor, controlling 14 feet of chip, to connect the first and second direct currents steady
The public negative pole end of voltage source, 13 feet for controlling chip are relay switching circuit drive outputs, and 12 feet for controlling chip are
IΔnLeak current fault signal input part is electrically connected with the output end of leak current fault monitoring circuit, and 11 feet for controlling chip are that function is protected in leakage
Energy recovering signal output end, 10 feet for controlling chip are that Function detection signal output end is protected in leakage, and 8 feet for controlling chip are water flow letters
Number input terminal, GL are the connector socket of water flow sensor, and 7 feet for controlling chip are the driving output of LED operation status indicator lamp
End, 5 feet for controlling chip connect public cathode by thermistor, and 5 feet for controlling chip also pass through the 8th resistance and the first direct current
The cathode output end of regulated power supply is electrically connected, control 1 foot of chip respectively with the cathode output end of the second D.C. regulated power supply and
8 feet of storaging chip are electrically connected；6 feet of storaging chip are electrically connected with 3 feet of control chip, 5 feet and control core of storaging chip
4 feet of piece are electrically connected, and 1 to 4 foot and 7 feet of storaging chip are grounded, the both ends of the second capacitor respectively with 4 feet of storaging chip
And 8 foot electrical connection.
In the technical scheme, the creepage protection function monitoring circuit includes second switch triode, third switch three
Pole pipe, testing coil, twelfth resistor to the 14th resistance, the 5th capacitor, the 6th capacitor and the 5th diode；Described second opens
The base stage for closing triode is electrically connected by thirteenth resistor with 11 feet of control chip, and the both ends of the 5th capacitor are attempted by the
In the base stage and emitter of two switching transistors, the emitter of second switch triode is grounded, the current collection of second switch triode
Pole is electrically connected with the power input of leak current fault monitoring circuit, and the base stage of the third switching transistor passes through twelfth resistor
It is electrically connected with 10 feet of control chip, the base stage of third switching transistor also passes through the 6th capacity earth, third switching transistor
Collector the output end of the second D.C. regulated power supply, the emitter of third switching transistor and the 5th are connect by the 14th resistance
The anode of diode is electrically connected, and the cathode of the 5th diode is electrically connected with one end of testing coil, another termination of testing coil
Ground, testing coil are wound around on leak current fault induction coil.
The utility model compared with prior art, has the advantages that
A. the working condition that leakage protection circuit can be monitored automatically, when leak current fault monitors circuit because fault or first device
Part damage etc. is when causing defencive function to fail, and automatic alarm and can trip simultaneously and cuts off L fire, N zero and PE and be grounded three pole power supplys.
B. there is power-off protection function, in the case where resetting working condition, such as make if leak current fault occur and meeting with single-phase power failure again
With the situation of switch socket, L fire, N zero and three pole power supply of PE ground connection all can be cut off immediately.
C. have water outlet power down function, when opening taps using water heater, as long as hot water one flows out, will jump immediately
Lock all cuts off L fire, N zero and three pole power supply of PE ground connection, and 1 minute or so the automatic closing that is delayed after shutdown hot water restores electricity.
D. have the function of power-failure memory, then restore electricity or pull up what leakage protecting plug was plugged again again when meeting with to have a power failure
Situation will restore the working condition before having a power failure automatically, that is, be switched on reset shape before having a power failure as long as no electric leakage or fault
State or power-off standby mode, the combined floodgate that will automatically reset after incoming call are powered or remain powered off standby mode, conform exactly to national standard
Operating characteristics requirement about leakage structure-preserving.
E. it can satisfy the national standard of low-voltage AC50V work, also there is overheat protection function etc..
Detailed description of the invention
Fig. 1 is the circuit diagram of a part of the utility model；
Fig. 2 is the circuit diagram of another part of the utility model.
Note: the circuit diagram in circuit diagram and Fig. 2 in Fig. 1 is combined into the complete circuit diagram of utility model, Fig. 1
In a point be electrically connected with a point in Fig. 2, the b point in Fig. 1 is electrically connected with the b point in Fig. 2, the c point in the c point in Fig. 1 and Fig. 2
Electrical connection, the d point in Fig. 1 are electrically connected with the d point in Fig. 2, and the e point in Fig. 1 is electrically connected with the e point in Fig. 2, the f point in Fig. 1 and
F point in Fig. 2 is electrically connected, and the g point in Fig. 1 is electrically connected with the g point in Fig. 2, and the h point in Fig. 1 is electrically connected with the h point in Fig. 2.
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing.It should be noted that
The explanation of these embodiments is used to help to understand the utility model, but does not constitute the restriction to the utility model.This
Outside, as long as technical characteristic involved in the various embodiments of the present invention described below does not constitute punching each other
It is prominent to be combined with each other.
Term " first " to " the 18th " is used for description purposes only in the description of the present invention, and should not be understood as
Indication or suggestion relative importance.
As shown in Figures 1 and 2, be it is a kind of with creepage protection function failure again defencive function Intelligent electric leakage protection insert
Head, including DC power supply circuit, relay switching circuit 2, single chip machine controlling circuit 4, creepage protection function monitoring circuit 5, examination
Electrical verification road 6, leak current fault induction coil 7 and leak current fault monitor circuit 8；Wherein, the DC power supply circuit is leak current fault
It monitors circuit 8 and following circuits provides DC supply, the output end and leak current fault of the leak current fault induction coil 7
Monitor the input terminal electrical connection of circuit 8；The single chip machine controlling circuit 3 includes control chip U2 and storaging chip U3, the control
Coremaking piece U2 peripheral circuit is equipped with reset switch RESET, and control chip U2 is electrically connected with storaging chip U3, the control chip U2
Control signal can deposit and transfer by storaging chip U3, the output end and control core of leak current fault monitoring circuit 8
The input terminal of piece U2 is electrically connected；The relay switching circuit 2 includes the relay JK and driving switch of three groups of normally opened contacts of band
Circuit, one end of the relay JK are electrically connected to obtain DC supply, relay with the output end of D.C. regulated power supply
The other end of device JK is electrically connected with the output end of driving switch circuit, three groups of normally opened contacts of relay JK be serially connected in respectively L fire,
N zero and PE in three pole power supplys, the input terminal of the driving switch circuit is electrically connected with the output end of control chip U2；The leakage
The input terminal of electric protection function monitor circuit 5 is protected Function detection signal output end with the leakage of control chip U2 and is electrically connected, and electric leakage is protected
The leakage that protective function monitoring circuit 5 exports protects Function detection signal and is input to hookup 6, and creepage protection function monitors circuit 5
Leakage is protected functional model of reduction signal input part and is electrically connected with the leakage guarantor's functional model of reduction signal output end for controlling chip U2, creepage protection function
The leakage of monitoring circuit 5 is protected functional model of reduction signal output end and is electrically connected with the power input of leak current fault monitoring circuit 8.
When work, power on, the utility model automatically begins to the detection operation of creepage protection function, control chip U2's
Function detection signal is protected in the leakage that 10 feet export duration 0.1mS or so, is monitored in circuit 5 by driving creepage protection function
Triode Q3 is loaded on the test coil L of hookup 6, and induction coil 7 sends electric leakage event to after receiving the stimulus
Barrier monitoring circuit 8, if leak current fault monitoring circuit 8 causes creepage protection function to lose because of fault or component damage
Effect cannot export the normally functioning high level detection signal of leakage guarantor and give control chip U2, control chip U2 that will drive immediately
Dynamic LED light issues flashing alarm signal and starting protection function, that is, presses RESET reset key without any reaction, will not close a floodgate logical
Electricity；If it is working properly that leak current fault monitors circuit 8, when it receives leakage and protects Function detection signal, height will be exported immediately
For level signal to 12 feet of control chip U2, controlling chip U2 will determine that automatically creepage protection function is normal, then control core
11 feet of piece U2 export a leakage and protect functional model of reduction signal, and the triode Q2 in circuit 5 is monitored by driving creepage protection function
By power supply shorted to earth≤1S of leak current fault monitoring circuit 8, it is forced to revert to low level by output high level detecting state
Standby mode；Subsequently into normal operating, the RESET reset key that control chip U2 is connect with 2 feet is pressed, control chip U2 is first
The output end working condition of storage chip U3 memory is removed, while controlling 13 feet and exporting high level driving signal, passes through relay
Switching circuit drives three groups of contact closures of relay, and three pole power supplys, LED light light with connecting L fire, N zero and PE.
When there is leak current fault or pressing test key, leak current fault induction coil 7 at once by the major loop sensed or
The I of ground wireΔnLeak current fault and stimulus are transmitted to 8 corresponding two, circuit different input terminals of leak current fault monitoring, electric leakage
Failure monitoring circuit 8 exports high level fault signal to 12 foot of input terminal of control chip U2 immediately, controls 13 feet of chip U2
Low level signal is exported immediately to relay switching circuit 2, is controlled relay JK power failure tripping, is disconnected by three groups of normally opened contact controls
The L fire of system, three pole power supplys of the ground N zero and PE, while LED light flashing alarm is driven by 7 feet；If leak current fault does not exclude,
Not brake application will be closed from jumping by pressing RESET reset key again at this time, and LED light, which flashes always, does not stop；Extremely excluded completely to leak current fault,
Again press RESET reset key, can Power resumption work, LED light restores normal straight bright state；
In reset is powered on, the utility model starts the detection operation of a creepage protection function every 4S~5S,
If leak current fault monitoring circuit 8 causes creepage protection function to fail because of fault or component damage, chip U2 is controlled
12 feet protect normally functioning high level detection signal because not receiving leakage, 13 feet will be driven to export high level, control immediately
Relay JK trips, with cutting off L fire, N zero and PE three pole power supplys, while driving LED light flashing alarm, when leak current fault monitoring is electric
After road troubleshooting, defencive function restore, it is necessary to RESET reset key is pressed again, after control chip U2 judgement confirmation is normal,
The failure off-position of storage chip U3 memory is removed first, then issues high-level command signals to 13 feet, and control relay closes
Lock Power resumption；In addition, the utility model can pass through intelligent control chip U2 accurate discrimination and handle leak current fault signal or
Leakage function detects signal, issues correct work order, ensures that leak current fault monitoring (protection) function not will receive electric leakage and protect
Any influence of protection circuit monitoring function, it is ensured that personal safety.
Because all control circuit working powers of the utility model are provided by D.C. regulated power supply, in low electricity
It presses under AC50V state, D.C. regulated power supply still can provide normal operating voltage, the work so the utility model can do as usual
Make, meets the requirement of national standard low voltage operating.
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
3；Second D.C. regulated power supply 3 receives the DC voltage of the first D.C. regulated power supply 1 output and carries out decompression and pressure stabilizing；Institute
Stating first D.C. regulated power supply 1 is switching regulator BUCK power supply, and the output end of the first D.C. regulated power supply 1 is with relay JK's
One end and the electrical connection of one end of current-limiting resistance R5 are to make relay JK and leak current fault monitor the acquisition DC operation electricity of circuit 8
Source；Second D.C. regulated power supply 3 is the detection for controlling chip U2, storaging chip U3 and creepage protection function monitoring circuit 5
Circuit provides DC supply.
In the present embodiment, first D.C. regulated power supply 1 is switching regulator BUCK power supply comprising three-terminal regulator block
U1, the first zener diode DW1, first diode D1 to third diode D3, the first electrolytic capacitor E1, the second electrolytic capacitor
E2, first capacitor C1, first resistor R1 to 3rd resistor R3 and inductance L1；Wherein, the first resistor R1 and first diode
One end is electrically connected with firewire L after D1 series connection, and the other end is defeated with the anode of the first electrolytic capacitor E1 and three-terminal regulator block U1 respectively
Enter end electrical connection, the cathode of the first electrolytic capacitor E1 meets zero curve N；An output end and first capacitor C1 of the three-terminal regulator block U1
One end electrical connection, the other end of first capacitor C1 respectively with the cathode of the second diode D2, one end of second resistance R2, third
The cathode of one end of resistance R3, one end of inductance L1 and third diode D3 is electrically connected, the other end and third of second resistance R2
The other end of resistance R3 is electrically connected with another output end of three-terminal regulator block U1, the anode of the second diode D2 and the first pressure stabilizing
The anode of diode DW1 is electrically connected, and the cathode of the first zener diode DW1 is electric with the other end of inductance L1, the second electrolysis respectively
One end electrical connection for holding the anode and relay JK of E2, so that relay JK be made to obtain DC supply, third diode D3
Anode and the cathode of the second electrolytic capacitor E2 meet zero curve N.
In the present embodiment, second D.C. regulated power supply 3 includes the second zener diode DW2, third electrolytic capacitor
E3, the 4th resistance R4 and the 5th resistance R5；Wherein, the second zener diode DW2 and third electrolytic capacitor E3 is mutually in parallel,
The cathode of the plus earth of second zener diode DW2, the second zener diode DW2 passes through the 4th resistance R4 and the first pressure stabilizing two
The cathode of pole pipe DW1 is electrically connected, to carry out progressive pressure stabilizing to the DC voltage of the cathode output of the first zener diode DW1
And decompression, the cathode of the second zener diode DW2 are the output end of the second D.C. regulated power supply 3；The one of 5th current-limiting resistance R5
End is electrically connected with the output end of the first D.C. regulated power supply 1, and other end connection leak current fault monitoring circuit 8 provides direct current work for it
Make power supply.
It in the present embodiment, further include the 4th diode D4, the both ends of the 4th diode D4 are attempted by relay JK
Both ends and the cathode of the 4th diode D4 be electrically connected with the output end of the first D.C. regulated power supply 1；It is inhaled for bypassing relay
Zygonema circle inverse peak voltage caused by shutdown transient protects triode Q1 not by its impacting with high pressure；The driving switch circuit
Including first switch triode Q1 and the 4th capacitor C4, the base stage of the first switch triode Q1 passes through eleventh resistor R11
It is electrically connected with the drive output of control chip U2, the other end of the collector and relay JK of first switch triode Q1 is electrically connected
It connects, the emitter ground connection of first switch triode Q1；The 4th capacitor C4 be attempted by the base stage of first switch triode Q1 with
Between emitter, for bypassing high-frequency interferencing signal, eleventh resistor R11 plays reception and transmitting and cushioning control chip U2 are sent out
Command signal out, can protective switch triode Q1 from strong signal rush of current effect；When work, control chip U2 is issued
Driving signal be transmitted to the base stage of first switch triode Q1 by eleventh resistor, driving first switch triode Q1 according to
The instruction of control chip U2 is turned on or off relay JK, so control on being serially connected in L fire, N zero and PE three pole power supplys three
Group normally opened contact closing or opening.
In the present embodiment, the model of the control chip U2 is SN8P2711, shares 14 pins；The storaging chip
The model of U3 is AT24C02, shares 8 pins；The both ends of the reset switch RESET respectively with control chip U2 2 feet and
The electrical connection of 14 feet, between 12 feet and 14 feet of control chip U2 and is connected to third capacitor C3,14 feet for controlling chip connect first
With the public negative pole end of the second D.C. regulated power supply, 13 feet for controlling chip are relay switching circuit drive outputs, control
12 feet of chip are IΔnLeak current fault signal input part is electrically connected with the output end of leak current fault monitoring circuit, controls chip
11 feet are that functional model of reduction signal output end is protected in leakage, and 10 feet for controlling chip are that Function detection signal output end is protected in leakage, control chip
8 feet be water-flow signal input terminal, GL is the connector socket of water flow sensor, and 7 feet for controlling chip are that LED operation state refers to
Show lamp drive output, 5 feet for controlling chip connect public cathode by thermistor, and 5 feet for controlling chip also pass through the 8th electricity
Resistance is electrically connected with the cathode output end of the first D.C. regulated power supply, control 1 foot of chip respectively with the second D.C. regulated power supply
The electrical connection of 8 feet of cathode output end and storaging chip U3；6 feet of storaging chip U3 are electrically connected with 3 feet of control chip U2, are stored
5 feet of chip U3 are electrically connected with 4 feet of control chip U2, and 1 to 4 foot and 7 feet of storaging chip U3 is grounded, the second capacitor C2
Both ends be electrically connected respectively with 4 feet of storaging chip U3 and 8 feet.In the case where reset is powered on state, if meeting with power failure phenomenon, control
Three groups of normally opened contacts of circuit power loss processed, relay JK disconnect automatically；When power is restored, as long as no leak current fault, control
Chip U2 transfers the 13 foot high level working state signals that storage chip U3 remembers in power down moment immediately, after discrimination is handled again
13 feet output high level is controlled, three groups of normally opened contacts closure of driving first switch triode Q1 conducting, control relay JK is extensive
It is powered on state again.
It is protected again if there is leak current fault protection or creepage protection function failure and overtemperature prote tripping powers off, simultaneously
Meet with and have a power failure then but also the situation that restores electricity not only, control chip U2 all can according to storage chip U3 power down moment remember 13
Foot low level tripped condition signal, control relay JK keep tripping off-position constant, it is necessary to after various troubleshootings,
Again it presses RESET and resets the failure off-position that key control chip U2 removes storage chip U3 memory, 13 feet can be defeated
High level signal out, control relay JK closure are powered, and such power-failure memory function just meets the structure of national standard
Operating characteristic.
The water outlet power down function of the utility model is in the case where reset is powered on state, and 8 feet of control chip U2 are incuding
To water flow sensing unit GL export stream impulse signal when, control chip U2 13 feet low level is reversed to by high level immediately,
It controls first switch triode Q1 and disconnects relay JK direct current supply, pass through three groups of normally opened contacts with cutting off L fire, N zero and PE three
Pole AC power source；LED light is extinguished, after the stream impulse blackout of water flow sensing unit GL, control chip U2 delay
1min or so, then 13 feet is instigated to be reversed to high level by low level, driving first switch triode Q1 conducting, relay JK obtains electric
Three groups of normally opened contact closure Power resumptions are controlled, LED light lights again；If being discharged in the state of tripping power-off, just again
Meet with the phenomenon that restoring electricity again that has a power failure then, the utility model will automatic closing be powered, LED light lights, and intelligent discrimination makes
The function is not by the control of power-failure memory function.
In addition, causing the utility model internal temperature to be increased to 100 °C or so when there is load excessive or poor contact
When dangerous values, negative tempperature coefficient thermistor Rt will be reduced to certain resistance value as the temperature rises, and connect power supply
Resistance R8 collective effect, 5 feet for controlling chip U2 are inverted to low level by normal high level, control chip U2 is instigated immediately
13 feet export low level, control relay JK tripping power-off, while driving LED light flashing alarm, until troubleshooting, temperature drop
To 50 °C or less normal values, RESET reset key is pressed again, and control chip U2 can just control 13 feet output high level, relay
JK obtains electric closure and powers on, and driving LED light stops flashing, restores normal straight bright state.
In the present embodiment, the creepage protection function monitoring circuit 5 includes second switch triode Q2, third switch three
Pole pipe Q3, testing coil L, twelfth resistor R12 to the 14th resistance R14, the 5th capacitor C5, the 6th capacitor C6 and the five or two pole
Pipe D5；The base stage of the second switch triode Q2 is electrically connected by thirteenth resistor R13 with 11 feet for controlling chip U2, described
The both ends of 5th capacitor C5 are attempted by base stage and the emitter of second switch triode Q2, the transmitting of second switch triode Q2
The collector of pole ground connection, second switch triode Q2 is electrically connected with the power input of leak current fault monitoring circuit 8, the third
The base stage of switching transistor Q3 is electrically connected by twelfth resistor R12 with 10 feet for controlling chip U2, third switching transistor Q3
Base stage also pass through the 6th capacitor C6 ground connection, the collector of third switching transistor Q3 connects second directly by the 14th resistance R14
The output end of regulated power supply 3 is flowed, the emitter of third switching transistor Q3 is electrically connected with the anode of the 5th diode D5, and the five or two
The cathode of pole pipe D5 is electrically connected with one end of testing coil L, and the other end ground connection of testing coil L, testing coil L is wound around electric leakage
On failure induction coil 7.
In the present embodiment, the leak current fault induction coil 7 includes the first induction coil ZCT1, the second induction coil
ZCT2, the 17th resistance R17, the 18th resistance R18, the 7th capacitor C7 and the 8th capacitor C8；Wherein, first induction coil
ZCT1 is set on firewire L and zero curve N, for incuding the leak current fault of major loop；The second induction coil ZCT2 is set in
On ground wire E, for incuding the leak current fault of ground wire；Two end Jie after the 17th resistance R17 is in parallel with the 7th capacitor C7
On the output end of first induction coil ZCT1, leakage is protected coil L and is wound around on the first induction coil ZCT1, the 18th resistance
On the output end of two the second induction coil of end Jie ZCT2 after R18 is in parallel with the 8th capacitor C8.
In the present embodiment, the hookup 6 includes test switch TEST and the 15th resistance R15；The experiment opening
It closes TEST to connect with the 15th resistance R15 latter termination firewire L, another cathode for terminating the 5th diode D5.
In the present embodiment, the leak current fault monitoring circuit 8 includes that leak current fault monitors integrated package U4, the 9th capacitor C9
To the 12nd capacitor C12 and the 16th resistance R16；Wherein the leak current fault monitoring integrated package U4 has 8 feet, leak current fault prison
1 foot and 2 feet for controlling integrated package U4 are the first input ends of leak current fault monitoring circuit 8, and leak current fault monitors 2 feet of integrated package U4
And 3 foot be leak current fault monitoring circuit 8 the second input terminal, leak current fault monitoring integrated package U4 7 feet be leak current fault monitoring
The output end of circuit 8, leak current fault monitor the 4 feet ground connection of integrated package U4；The both ends of the 9th capacitor C9 are former with electric leakage respectively
6 feet of barrier monitoring integrated package U4 and the electrical connection of 7 feet, the both ends of the tenth capacitor C10 monitor integrated package with leak current fault respectively
7 feet of U4 and the electrical connection of 4 feet, the both ends of the 11st capacitor C11 monitor 5 feet and 4 of integrated package U4 with leak current fault respectively
Foot electrical connection；Leak current fault monitors 8 feet and the collector of second switch triode Q2, the 5th current-limiting resistance R5 of integrated package U4
The positive terminal of one end and the 8th capacitor C8 electrical connection, the first D.C. regulated power supply of another termination 1 of the 5th current-limiting resistance R5 it is defeated
Outlet, the negative pole end ground connection of the 8th capacitor C8；1 foot and 2 feet of leak current fault monitoring integrated package U4 and the first induction coil ZCT1
Output end electrical connection, leak current fault monitor integrated package U4 3 feet and 2 the second induction coil of foot ZCT2 output end be electrically connected electricity
Connection；One end of the 12nd capacitor C12 is electrically connected with 2 feet of control chip U2, other end ground connection, leak current fault monitoring collection
7 feet of blocking U4 are electrically connected by the 16th resistance R16 with 12 feet for controlling chip U2, thus by leak current fault signal IΔnIt is defeated
Enter to control chip U2；Energization use process is resetted in the utility model, when leak current fault occur or press TEST test switch
When, leak current fault monitors the master that integrated package U4 will immediately sense the first induction coil ZCT1 or the second induction coil ZCT2
The I of circuit or earthing poleΔnLeak current fault and stimulus are input to 12 feet for controlling chip U2 after amplifying processing, by controlling
Coremaking piece U2 drives first switch triode Q1 to turn off relay JK DC power supply by the eleventh resistor R11 of 10 feet of connection,
Relay JK power loss trips immediately, controls three groups of normally opened contacts and cuts off AC power source, to reach protection personal safety or leakage
The purpose of electric protection function test；After leak current fault excludes, RESET reset key must be pressed again, it will by control chip U2
After the leak current fault status signal of storage chip U3 memory is reset, control chip U2 will export high level signal by 12 feet,
First switch triode Q1 conducting is driven, relay JK obtains electric, three groups of normally opened contacts closure, restores to give load appliance power supply.
The embodiments of the present invention is explained in detail in conjunction with attached drawing above, but the utility model is not limited to institute
The embodiment of description.For the ordinary skill in the art, the principles of the present invention and objective are not being departed from
In the case of to these embodiments carry out it is a variety of variation, modification, replacement and deformation still fall in the protection scope of the utility model
It is interior.
Claims (6)
1. it is a kind of with creepage protection function failure again defencive function Intelligent electric leakage protect plug, including DC power supply circuit, examination
Electrical verification road (6), leak current fault induction coil (7) and leak current fault monitoring circuit (8)；The DC power supply circuit is leak current fault
It monitors circuit (8) and following circuits provides DC supply, the output end of the leak current fault induction coil (7) and electric leakage
The input terminal of failure monitoring circuit (8) is electrically connected；Characterized by further comprising relay switching circuits (2), single-chip microcontroller control electricity
Road (4) and creepage protection function monitoring circuit (5)；The single chip machine controlling circuit (4) includes control chip (U2) and storage core
Piece (U3) is equipped with reset switch (RESET) on the control chip (U2), and control chip (U2) is electrically connected with storaging chip (U3)
It connects, the control signal of control chip (U2) can be deposited and be transferred by storaging chip (U3), the leak current fault monitoring
The output end of circuit (8) is electrically connected with the input terminal of control chip (U2)；The relay switching circuit (2) includes three groups of band normal
Open the relay (JK) and driving switch circuit of contact, one end of the relay (JK) and the output end electricity of D.C. regulated power supply
Connection is to obtain DC supply, and the other end of relay (JK) is electrically connected with the output end of driving switch circuit, relay
Three groups of normally opened contacts of device (JK) be serially connected in respectively L fire, N zero and PE in three pole power supplys, the input of the driving switch circuit
It holds and is electrically connected with the output end of control chip (U2)；The input terminal and control chip of creepage protection function monitoring circuit (5)
(U2) electrical connection of Function detection signal output end is protected in leakage, and Function detection is protected in the leakage that creepage protection function monitors circuit (5) output
Signal is input to hookup (6), and functional model of reduction signal input part and control core are protected in the leakage that creepage protection function monitors circuit (5)
The electrical connection of functional model of reduction signal output end is protected in the leakage of piece (U2), and functional model of reduction letter is protected in the leakage that creepage protection function monitors circuit (5)
Number output end is electrically connected with the power input of leak current fault monitoring circuit (8).
2. the Intelligent electric leakage according to claim 1 with creepage protection function failure defencive function again protects plug, special
Sign is that the D.C. regulated power supply includes the first D.C. regulated power supply (1) and the second D.C. regulated power supply (3)；Described second is straight
Stream regulated power supply (3) receives the DC voltage of the first D.C. regulated power supply (1) output and carries out decompression and pressure stabilizing；Described first is straight
Flowing regulated power supply (1) is switching regulator BUCK power supply, the one of the output end of first D.C. regulated power supply (1) and relay (JK)
End and the one end of current-limiting resistance (R5) electrical connection are to make relay (JK) and leak current fault monitoring circuit (8) obtain DC operation
Power supply；Second D.C. regulated power supply (3) is that control chip (U2), storaging chip (U3) and creepage protection function monitor circuit
(5) detection circuit provides DC supply.
3. the Intelligent electric leakage according to claim 2 with creepage protection function failure defencive function again protects plug, special
Sign is that first D.C. regulated power supply (1) is switching regulator BUCK power supply.
4. the Intelligent electric leakage according to claim 1 with creepage protection function failure defencive function again protects plug, special
Sign is to further include the 4th diode (D4), and the both ends of the 4th diode (D4) are attempted by the both ends of relay (JK) and the
The cathode of four diodes (D4) is electrically connected with the output end of the first D.C. regulated power supply (1)；The driving switch circuit includes the
The base stage of one switching transistor (Q1) and the 4th capacitor (C4), the first switch triode (Q1) passes through eleventh resistor
(R11) it is electrically connected with the drive output of control chip (U2), the collector and relay (JK) of first switch triode (Q1)
The other end electrical connection, first switch triode (Q1) emitter ground connection；4th capacitor (C4) is attempted by first switch
Between the base stage and emitter of triode (Q1).
5. it is according to claim 1 or 2 or 4 with creepage protection function failure again defencive function Intelligent electric leakage protection insert
Head, it is characterised in that the model of control chip (U2) is SN8P2711, shares 14 pins；The storaging chip (U3)
Model is AT24C02, shares 8 pins；The both ends of the reset switch (RESET) respectively with control chip (U2) 2 feet and
The electrical connection of 14 feet, between 12 feet and 14 feet of control chip (U2) and is connected to third capacitor (C3), and the 14 of control chip (U2)
The public negative pole end of the first and second D.C. regulated power supplies is connect to foot GND, 13 feet of control chip (U2) are relay switch electricity
Road (2) drive output, 12 feet for controlling chip (U2) are
IΔnLeak current fault signal input part is electrically connected with the output end of leak current fault monitoring circuit, controls 11 feet of chip (U2)
It is that functional model of reduction signal output end is protected in leakage, 10 feet of control chip (U2) are that Function detection signal output end is protected in leakage, control chip
(U2) 8 feet are water-flow signal input terminals, and GL is the connector socket of water flow sensor, and 7 feet of control chip (U2) are LED works
Make status indicator lamp drive output, 5 feet of control chip (U2) connect public cathode by thermistor (Rt), control chip
(U2) 5 feet also pass through the 8th resistance (R8) and are electrically connected with the cathode output end of the first D.C. regulated power supply (1), control chip
(U2) 1 foot is electrically connected with 8 feet of the cathode output end of the second D.C. regulated power supply (3) and storaging chip (U3) respectively；Storage
6 feet of chip (U3) are electrically connected with 3 feet of control chip (U2), 5 feet of storaging chip (U3) and the 4 feet electricity of control chip (U2)
Connection, 1 to 4 foot and 7 feet of storaging chip (U3) be grounded, the both ends of the second capacitor (C2) respectively with storaging chip (U3) 4
Foot and the electrical connection of 8 feet.
6. the Intelligent electric leakage according to claim 5 with creepage protection function failure defencive function again protects plug, special
Sign is that creepage protection function monitoring circuit (5) includes second switch triode (Q2), third switching transistor (Q3), examination
Test coil (L), twelfth resistor (R12) to the 14th resistance (R14), the 5th capacitor (C5), the 6th capacitor (C6) and the five or two
Pole pipe (D5)；11 feet that the base stage of the second switch triode (Q2) passes through thirteenth resistor (R13) and control chip (U2)
Electrical connection, the both ends of the 5th capacitor (C5) are attempted by base stage and the emitter of second switch triode (Q2), and second opens
Close the emitter ground connection of triode (Q2), the electricity of collector and the leak current fault monitoring circuit (8) of second switch triode (Q2)
The base stage of the electrical connection of source input terminal, the third switching transistor (Q3) passes through twelfth resistor (R12) and control chip (U2)
10 feet electrical connection, the base stage of third switching transistor (Q3) also pass through the 6th capacitor (C6) ground connection, third switching transistor
(Q3) collector connects the output end of the second D.C. regulated power supply (3), third switching transistor by the 14th resistance (R14)
(Q3) emitter is electrically connected with the anode of the 5th diode (D5), cathode and testing coil (L) of the 5th diode (D5)
One end electrical connection, the other end ground connection of testing coil (L), testing coil (L) are wound around on leak current fault induction coil (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821158285.1U CN208849175U (en) | 2018-07-21 | 2018-07-21 | With creepage protection function failure again defencive function Intelligent electric leakage protect plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821158285.1U CN208849175U (en) | 2018-07-21 | 2018-07-21 | With creepage protection function failure again defencive function Intelligent electric leakage protect plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208849175U true CN208849175U (en) | 2019-05-10 |
Family
ID=66353529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821158285.1U Withdrawn - After Issue CN208849175U (en) | 2018-07-21 | 2018-07-21 | With creepage protection function failure again defencive function Intelligent electric leakage protect plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208849175U (en) |
Cited By (1)
| 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 |
-
2018
- 2018-07-21 CN CN201821158285.1U patent/CN208849175U/en not_active Withdrawn - After Issue
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 |
| CN110739589B (en) * | 2018-07-21 | 2024-09-27 | 佛山市顺德区信辉达电子有限公司 | Intelligent leakage protection plug with leakage protection function failure and re-protection function |
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