CN209526293U - Three pole on-off leakage protecting plug of semi-intelligent - Google Patents
Three pole on-off leakage protecting plug of semi-intelligent Download PDFInfo
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- CN209526293U CN209526293U CN201920433545.XU CN201920433545U CN209526293U CN 209526293 U CN209526293 U CN 209526293U CN 201920433545 U CN201920433545 U CN 201920433545U CN 209526293 U CN209526293 U CN 209526293U
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Abstract
The utility model relates to a kind of three pole on-off leakage protecting plugs of semi-intelligent, including direct current regulation circuit, relay switching circuit, leakage protection circuit and single chip machine controlling circuit；The 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 connected on respectively on firewire L, zero curve N and ground wire E；Feature be further include overpressure protection circuit, Overtemperature protection circuit and reseting switch circuit, reseting switch circuit resets leakage protection circuit when power is off.Its advantage are as follows: in the case where resetting working condition; such as it is in the presence of that leak current fault meets with single-phase power failure as used switch socket again simultaneously; firewire, zero curve and three pole power supply of ground connection can all be cut off immediately; after circuit restores electricity; as long as no leak current fault; original reset working condition will be automatically restored to; the requirement of national standard low-voltage AC50V work can either be met; also there is superpressure and overheat protection function; small power consumption, temperature rise is low, strong antijamming capability; circuit is simple, and use is more convenient and safe.
Description
Technical field
The utility model relates to a kind of three pole on-off leakage protecting plugs of semi-intelligent.
Background technique
Common leakage protecting plug (PRCD) is typically all to cooperate monitoring circuit 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 the power-off that would not thread off is protected in leakage without shock current；So once there is leak current fault and breaking in no tripping
Before electricity, and single-phase power failure is met with, such as use switch socket situation, the control circuit for leaking guarantor will be due to losing the job power supply
Will not thread off tripping, i.e., cannot cut off three pole power supplys, so there is also some potential safety problemss；Currently, there is a kind of resetting
Under working condition, once there is leak current fault, and single-phase power failure or the situation using switch socket are met with again, can cut off
The leakage protecting plug of power supply, but it is impossible to meet the national standard of low-voltage AC50V work, there is also quiescent dissipations too
Greatly, Wen Shenggao, poor anti jamming capability, and the defects of circuit is complicated.
Summary of the invention
A kind of safer three pole of semi-intelligent type is provided the purpose of the utility model is to overcome the deficiencies in the prior art
On-off leakage protecting plug, the leakage are protected in the case where resetting working condition, leak current fault such as occur, and meet with single-phase power failure as used band
The situation etc. of switch socket can all cut off three pole power supplys of firewire, zero curve and ground connection, after circuit restores electricity, as long as
There is no leak current fault, original reset working condition will be automatically restored to, the national standard of low-voltage AC50V work can either be met
It is required that also there is superpressure and overheat protection function, and circuit is simple, strong antijamming capability etc..
It in order to achieve the above object, the utility model is realized in this way, is a kind of three pole on-off of semi-intelligent electric leakage guarantor
Protect plug, including direct current regulation circuit, relay switching circuit, leakage protection circuit and single chip machine controlling circuit；The direct current
The input terminal of voltage regulator circuit is electrically connected with city's alternating current, and the output end of direct current regulation circuit is relay switching circuit, electric leakage guarantor
Protection circuit and single chip machine controlling circuit provide working power；The relay switching circuit includes the relay of three groups of normally opened contacts of band
Device and driving switch circuit, one end of the relay are electrically connected to obtain direct current work with an output end of direct current regulation circuit
Make power supply, the other end of relay is electrically connected with the output end of driving switch circuit, and three groups of normally opened contacts of relay are gone here and there respectively
It is associated on firewire L, zero curve N and ground wire E, the input terminal of the driving switch circuit and the first output end of single chip machine controlling circuit
Electrical connection；The output end of the leakage protection circuit is electrically connected with the first input end of single chip machine controlling circuit；It is characterized in that
It further include overpressure protection circuit, Overtemperature protection circuit and reseting switch circuit；The input terminal and direct current of the overpressure protection circuit
The rectification output end of voltage regulator circuit is electrically connected, the output end of overpressure protection circuit and the second input terminal electricity of single chip machine controlling circuit
Connection；One end of the Overtemperature protection circuit is electrically connected with zero curve N, the other end and single chip machine controlling circuit of Overtemperature protection circuit
Third input terminal electrical connection；The input terminal of the reseting switch circuit is electrically connected with the output end of driving switch circuit, is resetted
The output end of switching circuit is electrically connected with the power circuit end of leakage protection circuit, and reseting switch circuit protects electric leakage when power is off
Protection circuit resets.
In the technical scheme, the reseting switch circuit include second switch triode, the 7th resistance, the 8th resistance and
4th capacitor；After 8th resistance is in parallel with the 4th capacitor one end respectively with the base stage of second switch triode and the 7th resistance one
End electrical connection, other end ground connection, the other end of the 7th resistance are electrically connected with the output end of driving switch circuit, three pole of second switch
The emitter of pipe is grounded, and second switch transistor collector is electrically connected with the power circuit end of leakage protection circuit.
In the technical scheme, the single chip machine controlling circuit includes single-chip microcontroller and reset switch；The type of the single-chip microcontroller
Number it is XJLB8002, shares 8 pins, 1 foot of single-chip microcontroller meets zero curve N, and 2 feet of single-chip microcontroller are the first output ends, and the 3 of single-chip microcontroller
Foot is first input end, and 6 feet of single-chip microcontroller are the second input terminals, and 5 feet of single-chip microcontroller are third input terminals, 8 feet of single-chip microcontroller with
The cathode output end of direct current regulation circuit is electrically connected, and one end of reset switch is electrically connected with 4 feet of single-chip microcontroller, reset switch it is another
One end ground connection；It further include working indicating, the working indicating includes the 4th resistance and light emitting diode, the 4th resistance
It is electrically connected with one end after light emitting diode series connection with 7 feet of single-chip microcontroller, an output end of the other end and direct current regulation circuit is electrically connected
It connects.
In the technical scheme, the direct current regulation circuit includes rectifier diode, the first three-terminal regulator block, the two or three end
Regulator block, first to third electrolytic capacitor, third capacitor and the 6th resistance；The anode of the rectifier diode is electrically connected with firewire L
It connects, the cathode of rectifier diode is protected with the input terminal and superpressure of the positive terminal of the first electrolytic capacitor and the first three-terminal regulator block respectively
The input terminal of protection circuit is electrically connected, and the cathode of rectifier diode is the rectification output end of direct current regulation circuit, the first three-terminal voltage-stabilizing
The output end of block respectively with the positive terminal of third electrolytic capacitor, one end of the 6th resistance, the second three-terminal regulator block input terminal and
One end of relay is electrically connected, and the first three-terminal regulator block provides operating voltage for relay, and the other end of the 6th resistance is electric leakage
Circuit is protected to provide DC supply；The negative pole end of first electrolytic capacitor, the negative pole end of third electrolytic capacitor and the one or three end
The ground terminal of regulator block is electrically connected with zero curve N, the output end of the second three-terminal regulator block respectively with 8 feet of single-chip microcontroller, shine two
The positive terminal of the anode of pole pipe, one end of third capacitor and the second electrolytic capacitor is electrically connected, the other end of third capacitor, the second electricity
The ground terminal of the negative pole end and the second three-terminal regulator block that solve capacitor is grounded.
In the technical scheme, the overpressure protection circuit includes first resistor, second resistance, first capacitor and pressure stabilizing two
Pole pipe；One end of first resistor is electrically connected with the rectification output end of direct current regulation circuit, and the other end of first resistor is respectively with
One end of one capacitor and the cathode electrical connection of zener diode, the other end of first capacitor are electrically connected with zero curve N, zener diode
Anode is electrically connected with 6 feet of one end of second resistance and single-chip microcontroller respectively, the other end ground connection of second resistance.
In the technical scheme, the Overtemperature protection circuit includes the second capacitor, 3rd resistor and negative temperature coefficient heat-sensitive
Resistance；One end is electrically connected with zero curve N after second capacitor, 3rd resistor and negative tempperature coefficient thermistor are in parallel, the other end and list
5 feet of piece machine are electrically connected.
It in the technical scheme, further include the second diode, the both ends of second diode are attempted by the two of relay
End, the cathode of the second diode are electrically connected with the cathode of first diode；The driving switch circuit includes three pole of first switch
The base stage of pipe and the 5th resistance, the first switch triode is electrically connected by the 5th resistance with 2 feet of single-chip microcontroller, first switch
The collector of triode is electrically connected with the other end of relay, and the collector of first switch triode also passes through the 7th resistance and
The electrical connection of two switching transistors, the emitter ground connection of first switch triode.
The utility model compared with prior art the advantages of are as follows: in the case where resetting working condition, such as there is leak current fault simultaneously
Situation of the single-phase power failure as used switch socket is met with again, immediately can all be cut firewire, zero curve and three pole power supplys of ground connection
It is disconnected, after circuit restores electricity, as long as no leak current fault, original reset working condition will be automatically restored to, can either be expired
The requirement of sufficient national standard low-voltage AC50V work, also has superpressure and overheat protection function, and small power consumption, temperature rise is low, anti-interference energy
Power is strong, and circuit is simple, and use is more convenient and safe.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model.
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 " is used for description purposes only to " the tenth " in the description of the present invention, and should not be understood as referring to
Show or imply relative importance.
As shown in Figure 1, it is a kind of three pole on-off leakage protecting plug of semi-intelligent, including direct current regulation circuit 1, relay
Switching circuit 2, leakage protection circuit 3, overpressure protection circuit 4, Overtemperature protection circuit 5, working indicating 6, single-chip microcontroller control
Circuit 7 and reseting switch circuit 8；Wherein, the input terminal of the direct current regulation circuit 1 is electrically connected with city's alternating current, DC voltage-stabilizing
The output end of circuit 1 is relay switching circuit 2, leakage protection circuit 3, overpressure protection circuit 4, Overtemperature protection circuit 5, work
Indicating circuit 6, single chip machine controlling circuit 7 and reseting switch circuit 8 provide working power；The relay switching circuit 2 includes
Relay JK and driving switch circuit with three groups of normally opened contacts, one end of the relay JK and the one of direct current regulation circuit 1
To obtain DC supply, the output end of the other end and driving switch circuit of relay JK is electrically connected for output end electrical connection
Connect, 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 it is defeated
Enter end to be electrically connected with the first output end of single chip machine controlling circuit 7；The output end and single-chip microcontroller of the leakage protection circuit 3 control
The first input end of circuit 7 is electrically connected；The input terminal of the overpressure protection circuit 4 and the rectification output end of direct current regulation circuit 1
Electrical connection, the output end of overpressure protection circuit 4 are electrically connected with the second input terminal of single chip machine controlling circuit 7；The overtemperature prote
One end of circuit 5 is electrically connected with zero curve N, the other end of Overtemperature protection circuit 5 and the third input terminal electricity of single chip machine controlling circuit 7
Connection；The input terminal of the working indicating 6 is electrically connected with the second output terminal of single chip machine controlling circuit 7；The reset is opened
The input terminal on powered-down road 8 is electrically connected with the output end of driving switch circuit, output end and the earth leakage protective electricity of reseting switch circuit 8
The power circuit end on road 3 is electrically connected, and when power is off, the output end of driving switch circuit is high level, and reseting switch circuit 8 makes to leak
Electric protection circuit 3 resets, and when power up is normal, the output end of driving switch circuit is low level, and reseting switch circuit 8 is disconnected
It opens, does not work to leakage protection circuit 3.
When work, when leakage protection circuit 3 has IΔnWhen leak current fault signal exports, the first of single chip machine controlling circuit 7 is defeated
Enter the I that termination receives the output of single chip machine controlling circuit 7ΔnIt is handled after fault-signal, single chip machine controlling circuit 7 first exports
End exports low level and gives driving switch circuit, and driving switch circuit disconnects, the high electricity of 7 second output terminal of single chip machine controlling circuit output
It puts down to working indicating 6, LED light issues flashing alarm signal, relay JK power loss, and three groups of normally opened contacts disconnect, from
And cut off N zero, L fire, PE be grounded three poles power supply until leak current fault exclude completely, press reset key again, can restore
It closes a floodgate power supply, effective protection personal safety；After tripping power-off, the input terminal of reseting switch circuit 8 is high level, reset switch
The output end of circuit 8 is low level, that is, cuts off (short circuit) power supply of leakage protection circuit；After leak current fault excludes, press
RESET reset switch key, the first output end and second output terminal of single chip machine controlling circuit 7 export high level, driving switch
Circuit conducting, relay JK obtain electric, and the closure conducting of three groups of normally opened contacts restores electricity state, and the recovery of working indicating 6 is always on
State, 8 input terminal of reseting switch circuit are transformed into low level, and the output end of reseting switch circuit 8 is transformed into high level, that is, restores
Supply electricity to leakage protection circuit；Because the working power of relay JK, leakage protection circuit 3 and single chip machine controlling circuit 7 are all
It is provided by D.C. regulated power supply 1, under low-voltage AC50V state, direct current regulation circuit 1 still can provide work electricity
Pressure makes single chip machine controlling circuit 5, relay switching circuit 2 and leakage protection circuit 3 work as usual, so the technical program is complete
The national standard of AC50V low voltage operating is met entirely.
In the present embodiment, the single chip machine controlling circuit 7 includes single-chip microcontroller U3 and reset switch RESET；The monolithic
The model of machine U3 is XJLB8002, shares 8 pins, and 1 foot of single-chip microcontroller U3 meets zero curve N, and 2 feet of single-chip microcontroller U3 are the first output
End, 3 feet of single-chip microcontroller U3 are first input ends, and 6 feet of single-chip microcontroller U3 are the second input terminals, and 5 feet of single-chip microcontroller U3 are that third is defeated
Enter end, 8 feet of single-chip microcontroller U3 are electrically connected with an output end of direct current regulation circuit 1, one end of reset switch RESET and single-chip microcontroller
4 feet of U3 are electrically connected, the other end ground connection of reset switch RESET；It further include working indicating 6, the working indicating 6
Including the 4th resistance R4 and Light-emitting diode LED, one end is with single-chip microcontroller U3's after the 4th resistance R4 connects with Light-emitting diode LED
The electrical connection of 7 feet, the other end are electrically connected with an output end of direct current regulation circuit 1.
In the case where resetting working condition, if meet with power failure phenomenon, 1 power loss of direct current regulation circuit, single-chip microcontroller U3 and relay
JK power loss, three groups of normally opened contacts disconnect immediately；When power is restored, as long as no leak current fault, 2 feet of single-chip microcontroller U3 will be defeated
High level out, the conducting of driving switch circuit, three groups of normally opened contact automatic pick conductings are restored to powered operation state, single-chip microcontroller U3
7 feet export low level, Light-emitting diode LED holding be always on state.When there is IΔnWhen leak current fault, leakage protection circuit 3
Output end will be by IΔnLeak current fault signal is input to 3 feet of single-chip microcontroller U3, and 2 feet of single-chip microcontroller U3 are reversed to low by high potential
Current potential, driving switch circuit disconnect, and relay JK power loss, three groups of normally opened contacts disconnect stopping immediately and power to electric appliance load, single
7 feet of piece machine U3 discontinuously export high level, Light-emitting diode LED flashing alarm；If there is IΔnLeak current fault is met with again simultaneously
Have a power failure the situation then to restore electricity again, as long as leak current fault does not exclude, single-chip microcontroller U3 would not export reverse signal to drive
Dynamic switching circuit, so just power loss, three groups of normally opened contacts are then constantly in off-state and will not be closed automatically relay JK always；
Leak current fault has excluded when power is restored, then 2 feet of single-chip microcontroller U3 will export high potential automatically, and driving switch circuit is led
Logical, relay JK obtains electric, and three groups of normally opened contacts closures restore electricity state, therefore are extremely secure.
In the present embodiment, the direct current regulation circuit 1 includes rectifier diode D1, the first three-terminal regulator block U1, second
Three-terminal regulator block U2, first to third electrolytic capacitor E1-E3, third capacitor C3 and the 6th resistance R6；The rectifier diode D1
Anode be electrically connected with firewire L, the cathode of rectifier diode D1 respectively with the positive terminal of the first electrolytic capacitor E1 and the one or three end
The input terminal electrical connection of the input terminal and overpressure protection circuit 4 of regulator block U1, the cathode of rectifier diode D1 are DC voltage-stabilizing electricity
The rectification output end on road 1, the output end of the first three-terminal regulator block U1 respectively with the positive terminal of third electrolytic capacitor E3, the 6th resistance
One end of one end of R6, the input terminal of the second three-terminal regulator block U2 and relay JK is electrically connected, and the first three-terminal regulator block U1's is defeated
Outlet provides operating voltage for relay JK, and the other end of the 6th resistance R6 is that leakage protection circuit 3 provides DC supply；
The ground terminal of the negative pole end of first electrolytic capacitor E1, the negative pole end of third electrolytic capacitor E3 and the first three-terminal regulator block U1 is with zero
Line N electrical connection, the output end of the second three-terminal regulator block U2 respectively with 8 feet of single-chip microcontroller U3, the anode of Light-emitting diode LED, the
The electrical connection of the positive terminal of one end of three capacitor C3 and the second electrolytic capacitor E2, the output end of the second three-terminal regulator block U2 are single-chip microcontroller
U3 provides DC supply, the negative pole end and the second three-terminal regulator block of the other end of third capacitor C3, the second electrolytic capacitor E2
The ground terminal of U2 is grounded.
In the present embodiment, the overpressure protection circuit 4 include first resistor R1, second resistance R2, first capacitor C1 and
Zener diode DW；One end of the first resistor R1 is electrically connected with the anode of rectifier diode D1, the end of first resistor R1
The input terminal of overpressure protection circuit 4, the other end of first resistor R1 respectively with one end of first capacitor C1 and zener diode
The cathode of DW is electrically connected, and the other end of first capacitor C1 is electrically connected with zero curve N, zener diode DW anode respectively with second resistance
One end of R2 and the 6 feet electrical connection of single-chip microcontroller U3, the other end ground connection of second resistance R2.
When work, when the overtension of 1 rectification output end of direct current regulation circuit, that is, city's alternating current is more than 295V or more, surely
Diode DW snowslide immediately short circuit is pressed, 6 feet of single-chip microcontroller U3 become high potential from low potential immediately, and 2 feet of single-chip microcontroller U3 are immediately
Low potential is reversed to by high potential, driving switch circuit disconnects, and relay JK power loss disconnects three groups of normally opened contacts, plays superpressure
The effect of protection；When city's alternating current is lower than 250V, zener diode DW restores normal condition, and 6 feet of single-chip microcontroller U3 return to
Low potential, 2 feet of single-chip microcontroller U3 export high level, the conducting of driving switch circuit, relay JK work once electrified, three groups of normally opened contacts
Closure restores normal power supply.
In the present embodiment, the Overtemperature protection circuit 6 includes 3rd resistor R3, the second capacitor C2 and negative temperature coefficient heat
Quick resistance Rt；One end is electrically connected with zero curve N after the second capacitor C2 is in parallel with negative tempperature coefficient thermistor Rt, the other end point
It is not electrically connected with one end of 5 feet of single-chip microcontroller U3 and 3rd resistor R3, the other end of 3rd resistor R3 is defeated with end regulator block U1's
Outlet electrical connection.
When work, when the temperature that negative tempperature coefficient thermistor Rt is incuded is greater than 120 °C, i.e. the electricity of thermistor Rt
When 5 feet that resistance value is reduced to certain value and single-chip microcontroller U3 are reduced to setting value by high potential, 2 feet of single-chip microcontroller U3 are immediately by high electricity
To low potential, driving switch circuit disconnects bit reversal, and relay JK power loss disconnects three groups of normally opened contacts, plays overpressure protection
Effect, when temperature is reduced to 50 ° or less, negative tempperature coefficient thermistor Rt is returned when being raised to certain value, and 2 feet of single-chip microcontroller U3 are just
High level, the conducting of driving switch circuit, relay JK work once electrified, three groups of normally opened contact closure recovery normal power supplies can be exported.
It in the present embodiment, further include the second diode D2, the both ends of the second diode D2 are attempted by relay JK
Both ends, the cathode of the second diode D2 is electrically connected with the cathode of first diode D1；The driving switch circuit includes first
The base stage of switching transistor Q1 and the 5th resistance R5, the first switch triode Q1 pass through the 5th resistance R5's and single-chip microcontroller U3
The electrical connection of 2 feet, the collector of first switch triode Q1 are electrically connected with the other end of relay JK, first switch triode Q1's
Emitter ground connection.
In the present embodiment, the reseting switch circuit 8 includes second switch triode Q2, the 7th resistance R7, the 8th electricity
Hinder R8 and the 4th capacitor C4；One end base stage with second switch triode Q2 respectively after 8th resistance R8 is in parallel with the 4th capacitor C4
And the 7th resistance R7 one end electrical connection, other end ground connection, the collection of the other end of the 7th resistance R7 and first switch triode Q1
Electrode electrical connection, the emitter ground connection of second switch triode Q2, second switch triode Q2 collector and leakage protection circuit 3
Power circuit end electrical connection.
When work, when 3 feet of single-chip microcontroller U3 receive IΔnWhen electric leakage signal, 2 feet of single-chip microcontroller U3 are exported immediately to first
The base stage low level signal of switching transistor Q1, first switch triode Q1 are disconnected, relay JK power loss, and three groups of normally opened contacts are disconnected
Open to cut off the power and will not automatic recovery of power supply, while the base stage of second switch triode Q2 becomes high level, and second opens
It closes triode Q2 conducting and 3 power circuit end of leakage protection circuit is shorted power loss；The overturning of earth leakage protective latch cicuit is forced to reset,
After leak current fault excludes, reset switch RESET is pressed, 2 feet of single-chip microcontroller U3 are exported to the base stage of first switch triode Q1
High level signal, first switch triode Q1 conducting, relay JK obtain electric, and the conducting of three groups of normally opened contacts of relay JK continues as
Load supplying, while the base stage of second switch triode Q2 becomes low level, second switch triode Q2 is disconnected, earth leakage protective electricity
Rood electric-opening standby monitoring state.
In the present embodiment, the leakage protection circuit 3 include the first induction coil ZCT1, the second induction coil ZCT2,
Test switch TEST, the 5th capacitor C5 to the tenth capacitor C10, the 9th resistance R9 to twelfth resistor R12 and leak current fault monitor
Chip U4；The model of the leak current fault monitoring chip U4 is RT54123B, and leak current fault monitoring chip U4 has 8 feet, electric leakage
1 foot and 2 feet of failure monitoring chip U4 are the first input ends of leakage protection circuit 3,2 feet of leak current fault monitoring chip U4 and
3 feet are the second input terminals of leakage protection circuit 3, and 7 feet of leak current fault monitoring chip U4 are the output of leakage protection circuit 3
End, 4 feet of leak current fault monitoring chip U4 meet zero curve N；The both ends of 5th capacitor C5 respectively with leak current fault monitoring chip U4 4
Foot and the electrical connection of 5 feet, the both ends of the 6th capacitor C6 are electrically connected with 6 feet of leak current fault monitoring chip U4 and 7 feet respectively, the 7th electricity
The both ends for holding C7 are electrically connected with 7 feet of leak current fault monitoring chip U4 and 4 feet respectively；8 feet of leak current fault monitoring chip U4 point
It is not electrically connected with the collector of the other end of the 6th resistance R6 and second switch triode Q2, the 6th resistance R6 is leak current fault prison
It controls chip U4 and direct-current working volts is provided；When power is off, the base stage of second switch triode Q2 obtains high level, second switch three
Pole pipe Q2 conducting, resets leak current fault monitoring chip U4；When solving electrical leakage problems and when restoring normal power supply, open due to first
Triode Q1 conducting is closed, the base stage of second switch triode Q2 is low level, and second switch triode Q2 is disconnected, second switch three
Pole pipe Q2 does not work to leak current fault monitoring chip U4；The both ends of the 8th capacitor C8 and eleventh resistor R11 respectively with
2 feet of leak current fault monitoring chip U4 and 3 feet electrical connection, the both ends of the tenth capacitor C10 and twelfth resistor R12 respectively with
1 foot of leak current fault monitoring chip U4 and the electrical connection of 2 feet；One end of the 9th capacitor C9 is with leak current fault monitoring chip U4's
The electrical connection of 2 feet, other end ground connection；The first induction coil ZCT1 is set on firewire L and zero curve N, the first induction coil
The both ends of first group of coil of ZCT1 are electrically connected with 2 feet of leak current fault monitoring chip U4 and 3 feet respectively, the first induction coil
One end of second group of coil of ZCT1 is electrically connected by the tenth resistance R10 and test switch TEST with firewire L, the first induction coil
The other end of second group of coil of ZCT1 is grounded；The second induction coil ZCT2 is set on ground wire E, the second induction coil
The both ends of ZCT2 are electrically connected with 1 foot of leak current fault monitoring chip U4 and 2 feet.
When work, when the first induction coil ZCT1 or the second induction coil ZCT2 sense IΔnWhen leak current fault signal, leakage
The I that electric fault monitoring chip U4 immediately senses the first induction coil ZCT1 or the second induction coil ZCT2ΔnLeak current fault letter
3 foot of input terminal for being input to single-chip microcontroller U3 after processing by the 9th resistance R9 again number is amplified, 2 feet of single-chip microcontroller U3 are defeated immediately
Low level out controls first switch triode Q1 open circuit by the 5th resistance R5, and three groups of relay JK power loss, relay JK are normal
It opens contact and disconnects three pole power supplys of cutting immediately, to achieve the purpose that protect personal safety, at this point, 7 feet of single-chip microcontroller U3 are disconnected
Continuous output high level, Light-emitting diode LED flashing alarm；After leak current fault excludes, RESET reset switch must be pressed again
Key, 2 feet of single-chip microcontroller U3 can be just turned to high potential by low potential, and relay JK obtains electric, first switch triode Q1 conducting, and three
Group normally opened contact closure is restored to power to load appliance.
Detect creepage protection function: when pressing TEST test switch, second group of coil sense of the first induction coil ZCT1
This simulation I should be arrivedΔnThe signal is input to leak current fault by first group of coil of leak current fault signal, the first induction coil ZCT1
Monitoring chip U4, the I that leak current fault monitoring chip U4 will be sensedΔnLeak current fault signal, which amplifies, to be handled and is input to list
3 foot of input terminal of piece machine U3,2 feet of single-chip microcontroller U3 export low level immediately and are input to first switch three by the 5th resistance R5
The base stage of pole pipe Q1, first switch triode Q1 open circuit, relay JK power loss, 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.
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 (7)
1. a kind of three pole on-off leakage protecting plug of semi-intelligent, including direct current regulation circuit (1), relay switching circuit (2), leakage
Electric protection circuit (3) and single chip machine controlling circuit (7)；The input terminal of the direct current regulation circuit (1) is electrically connected with city's alternating current,
The output end of direct current regulation circuit (1) is relay switching circuit (2), leakage protection circuit (3) and single chip machine controlling circuit (7)
Working power is provided；The relay switching circuit (2) includes the relay (JK) and driving switch electricity of three groups of normally opened contacts of band
Road, one end of the relay (JK) are electrically connected to obtain DC supply with an output end of direct current regulation circuit (1),
The other end of relay (JK) is electrically connected with the output end of driving switch circuit, and three groups of normally opened contacts of relay (JK) are gone here and there respectively
It is associated on firewire L, zero curve N and ground wire E, the first of the input terminal of the driving switch circuit and single chip machine controlling circuit (7) is defeated
Outlet electrical connection；The output end of the leakage protection circuit (3) is electrically connected with the first input end of single chip machine controlling circuit (7)；
Characterized by further comprising overpressure protection circuit (4), Overtemperature protection circuit (5) and reseting switch circuits (8)；The overpressure protection
The input terminal of circuit (4) is electrically connected with the rectification output end of direct current regulation circuit (1), the output end of overpressure protection circuit (4) with
Second input terminal of single chip machine controlling circuit (7) is electrically connected；One end of the Overtemperature protection circuit (5) is electrically connected with zero curve N, is surpassed
The other end of temperature protection circuit (5) is electrically connected with the third input terminal of single chip machine controlling circuit (7)；The reseting switch circuit
(8) input terminal is electrically connected with the output end of driving switch circuit, the output end and leakage protection circuit of reseting switch circuit (8)
(3) power circuit end electrical connection, reseting switch circuit (8) resets leakage protection circuit (3) when power is off.
2. three pole on-off leakage protecting plug of semi-intelligent according to claim 1, it is characterised in that the reset switch electricity
Road (8) includes second switch triode (Q2), the 7th resistance (R7), the 8th resistance (R8) and the 4th capacitor (C4)；8th resistance
(R8) after in parallel with the 4th capacitor (C4) one end respectively with the base stage of second switch triode (Q2) and the 7th resistance (R7) one
End electrical connection, other end ground connection, the other end of the 7th resistance (R7) are electrically connected with the output end of driving switch circuit, second switch
The emitter of triode (Q2) is grounded, the power circuit end of second switch triode (Q2) collector and leakage protection circuit (3)
Electrical connection.
3. three pole on-off leakage protecting plug of semi-intelligent according to claim 1, it is characterised in that the single-chip microcontroller control
Circuit (7) includes single-chip microcontroller (U3) and reset switch (RESET)；The model of the single-chip microcontroller (U3) is XJLB8002, shares 8
Pin, 1 foot of single-chip microcontroller (U3) meet zero curve N, and 2 feet of single-chip microcontroller (U3) are the first output ends, and 3 feet of single-chip microcontroller (U3) are first
Input terminal, 6 feet of single-chip microcontroller (U3) are the second input terminals, and 5 feet of single-chip microcontroller (U3) are third input terminals, the 8 of single-chip microcontroller (U3)
Foot is electrically connected with an output end of direct current regulation circuit (1), one end of reset switch (RESET) and the 4 feet electricity of single-chip microcontroller (U3)
Connection, the other end ground connection of reset switch (RESET)；It further include working indicating (6), working indicating (6) packet
Include the 4th resistance (R4) and light emitting diode (LED), one end and monolithic after the 4th resistance (R4) is connected with light emitting diode (LED)
7 feet of machine (U3) are electrically connected, and the other end is electrically connected with an output end of direct current regulation circuit (1).
4. three pole on-off leakage protecting plug of semi-intelligent according to claim 1 or 3, it is characterised in that the DC voltage-stabilizing
Circuit (1) includes rectifier diode (D1), the first three-terminal regulator block (U1), the second three-terminal regulator block (U2), first to third electricity
Solve capacitor (E1-E3), third capacitor (C3) and the 6th resistance (R6)；The anode of the rectifier diode (D1) is electrically connected with firewire L
It connects, the cathode of rectifier diode (D1) is defeated with the positive terminal of the first electrolytic capacitor (E1) and the first three-terminal regulator block (U1) respectively
Enter the input terminal electrical connection of end and overpressure protection circuit (4), the cathode of rectifier diode (D1) is the whole of direct current regulation circuit (1)
Flow output end, the output end of the first three-terminal regulator block (U1) respectively with the positive terminal of third electrolytic capacitor (E3), the 6th resistance
(R6) one end electrical connection of the input terminal and relay (JK) of one end, the second three-terminal regulator block (U2), the first three-terminal regulator block
(U1) operating voltage is provided for relay (JK), the other end of the 6th resistance (R6) is that leakage protection circuit (3) provide direct current work
Make power supply；The negative pole end of first electrolytic capacitor (E1), the negative pole end of third electrolytic capacitor (E3) and the first three-terminal regulator block (U1)
Ground terminal be electrically connected with zero curve N, the output end of the second three-terminal regulator block (U2) respectively with 8 feet of single-chip microcontroller (U3), shine
The positive terminal of the anode of diode (LED), one end of third capacitor (C3) and the second electrolytic capacitor (E2) is electrically connected, third capacitor
(C3) the negative pole end of the other end, the second electrolytic capacitor (E2) and the ground terminal of the second three-terminal regulator block (U2) is grounded.
5. three pole on-off leakage protecting plug of semi-intelligent according to claim 4, it is characterised in that the overpressure protection electricity
Road (4) includes first resistor (R1), second resistance (R2), first capacitor (C1) and zener diode (DW)；First resistor (R1)
One end be electrically connected with the rectification output end of direct current regulation circuit (1), the other end of first resistor (R1) respectively with first capacitor
(C1) the cathode electrical connection of one end and zener diode (DW), the other end of first capacitor (C1) are electrically connected with zero curve N, pressure stabilizing
Diode (DW) anode is electrically connected with 6 feet of one end of second resistance (R2) and single-chip microcontroller (U3) respectively, second resistance (R2)
Other end ground connection.
6. three pole on-off leakage protecting plug of semi-intelligent according to claim 1 or 2, it is characterised in that the overtemperature prote
Circuit (5) includes the second capacitor (C2), 3rd resistor (R3) and negative tempperature coefficient thermistor (Rt)；Second capacitor (C2),
One end is electrically connected with zero curve N after three resistance (R3) and negative tempperature coefficient thermistor (Rt) are in parallel, the other end and single-chip microcontroller (U3)
5 feet electrical connection.
7. three pole on-off leakage protecting plug of semi-intelligent according to claim 1 or 2 or 3, it is characterised in that further include
The both ends of two diodes (D2), second diode (D2) are attempted by the both ends of relay (JK), and the second diode (D2)
Cathode be electrically connected with the cathode of first diode (D1)；The driving switch circuit includes first switch triode (Q1) and
The base stage of five resistance (R5), the first switch triode (Q1) is electrically connected by 2 feet of the 5th resistance (R5) and single-chip microcontroller (U3)
It connects, the collector of first switch triode (Q1) is electrically connected with the other end of relay (JK), first switch triode (Q1)
Collector also passes through the 7th resistance (R7) and is electrically connected with second switch triode (Q2), the emitter of first switch triode (Q1)
Ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433545.XU CN209526293U (en) | 2019-04-02 | 2019-04-02 | Three pole on-off leakage protecting plug of semi-intelligent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920433545.XU CN209526293U (en) | 2019-04-02 | 2019-04-02 | Three pole on-off leakage protecting plug of semi-intelligent |
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| Publication Number | Publication Date |
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| CN209526293U true CN209526293U (en) | 2019-10-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787044A (en) * | 2019-04-02 | 2019-05-21 | 佛山市顺德区信辉达电子有限公司 | Three pole on-off leakage protecting plug of semi-intelligent |
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2019
- 2019-04-02 CN CN201920433545.XU patent/CN209526293U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109787044A (en) * | 2019-04-02 | 2019-05-21 | 佛山市顺德区信辉达电子有限公司 | Three pole on-off leakage protecting plug of semi-intelligent |
| CN109787044B (en) * | 2019-04-02 | 2023-09-22 | 佛山市顺德区信辉达电子有限公司 | Semi-intelligent tripolar on-off leakage protection plug |
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