CN205846362U - Intelligent leakage protecting plug - Google Patents
Intelligent leakage protecting plug Download PDFInfo
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- CN205846362U CN205846362U CN201620410237.1U CN201620410237U CN205846362U CN 205846362 U CN205846362 U CN 205846362U CN 201620410237 U CN201620410237 U CN 201620410237U CN 205846362 U CN205846362 U CN 205846362U
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Abstract
This utility model relates to a kind of intelligent leakage protecting plug, and feature is to include Schmitt electric field induction control circuit, fault current sensor circuit, hookup, electrical apparatus release, relay and switch driving circuit；The metal inductive probe of Schmitt electric field induction control circuit electrically connects with the two ends of hookup respectively near the input Y1 of ground wire E, its outfan Y2 and Y3；First and second zero sequence current mutual inductor of fault current sensor circuit is respectively sleeved on ground wire E, zero line N and live wire L；Electrical apparatus release includes the switch with one group of opening and closing contact and tripping coil, and three groups of normally opened contact one end of relay connect ground wire E, zero line N and live wire L respectively, and the other end connects output loading end respectively；The outfan of switch driving circuit is electrically connected with tripping coil by commutation diode.Its advantage is: the leak current fault of any special circumstances no matter occur, can cut off zero the most simultaneously, fire, three-phase (line) power supply circuits, it is ensured that the person preserves from.
Description
Technical field
This utility model relates to a kind of intelligent leakage protecting plug.
Background technology
At present, commonly used three leakage protecting plug (PRCD) that extremely breaks includes current mode and conversion voltage-type etc., all
There are two kinds of potential safety hazards, one is under false voltage guard mode, when running into zero line N and the live wire L reversal connection of supply line,
If simultaneously the fault of tape electricity (PE pole and live wire puncture short), even if arising that human electric shock, also will not thread off
The danger of power-off, i.e. loses creepage protection function；Two is under normal reset duty, once runs into power supply single-phase (line)
Power-off, as used the socket of belt switch, only have turned off the special status of zero line N, if now human contact is to the electro-mechanical part of load
Part, leakage is protected plug and would not be threaded off power-off, i.e. can not protect personal safety.
It addition, existing three extremely break the abnormal instruction of leakage protecting plug (PRCD) ground connection the most generally exist two kinds bad existing
As, one is in the case of ground wire electrification (PE pole and live wire short circuit), it is necessary to can after human electric shock power-off of threading off
There is instruction (abnormal display lamp is bright)；Even if ground wire electrification before i.e. not having dropout power-off there will not be warning instruction if human body does not gets an electric shock；
Two is when run into the zero line N of supply line and live wire L reversal connection and in the case of ground wire is the most charged simultaneously, ground connection exception indicated work
Can complete failure (i.e. abnormal display lamp will not be bright).
Summary of the invention
The purpose of this utility model is the security breaches overcoming prior art, it is provided that run into various routine or special if a kind of
The leak current fault of situation, including supply line zero, live wire reversal connection, or occur that ground wire electrification and single-phase (line) power-off etc. are different simultaneously
Often situation, can thread off immediately power-off and ground connection exception display lamp can and alarm instruction, more safe and reliable intelligence
Type leakage protecting plug.
In order to achieve the above object, this utility model is achieved in that it is a kind of intelligent leakage protecting plug, its
Be characterised by including Schmitt electric field induction control circuit, fault current sensor circuit, hookup, electrical apparatus release, relay and
Switch driving circuit；Wherein
The metal inductive probe (RC) of described Schmitt electric field induction control circuit across insulator near the input of ground wire E
End Y1, the outfan Y2 and outfan Y3 of Schmitt electric field induction control circuit respectively with the two ends of the test switch of hookup
Electrical connection；
Described fault current sensor circuit includes the first zero sequence current mutual inductor, the second zero sequence current mutual inductor, the first electricity
Resistance, the second resistance, the first electric capacity and the second electric capacity；Described first zero sequence current mutual inductor is set on ground wire E, described first electricity
Resistance and the first electric capacity are connected in parallel on two outfans of the first zero sequence current mutual inductor, two outfans of the first zero sequence current mutual inductor
Electrically connect with one group of input bipod of switch driving circuit respectively；Described second zero sequence current mutual inductor is set in city's alternating current
Zero line N and live wire L on, the second zero sequence current mutual inductor includes fault induction coil and testing coil, described second resistance and
Second electric capacity is connected in parallel on two outfans of fault induction coil, and two outfans of fault induction coil are electric with switch drive respectively
Another input bipod electrical connection on road, an outfan of testing coil electrically connects with civil power live wire L input, testing coil
The test resistance of another outfan and hookup and test switch electrically connect with zero line N input after connecting；
Described electrical apparatus release includes the switch with one group of opening and closing contact and tripping coil, and described relay touches for three groups of band is normally opened
The switch of point and the assembly of pull-in winding；One end, opening and closing contact of described electrical apparatus release is electric with the live wire L input of city's alternating current
Connecting, the opening and closing contact other end of electrical apparatus release electrically connects with one end of tripping coil and pull-in winding one end of relay；
The outfan of described switch driving circuit is electrically connected with the tripping coil other end by commutation diode, described switch
The zero line N being connected to city's alternating current after the other end parallel connection of the negative pole common port of drive circuit and the pull-in winding of relay is defeated
Enter end；Three groups of normally opened contact one end of described relay connect the ground wire E of city's alternating current, zero line N and live wire L, the other end respectively
Connect output loading end respectively.
In the technical program, described Schmitt electric field induction control circuit includes anti-phase Schmitt trigger, metal sense
Should pop one's head in, the first audion, the second audion, the second to the 4th diode, the second light emitting diode, the 6th to the 16th electricity
Resistance, the 8th to the tenth electric capacity and relay；The model of wherein said anti-phase Schmitt trigger is 74HC14D, anti-phase Schmitt
The pin 1 of trigger electrically connects with pin 12, and the pin 14 of anti-phase Schmitt trigger connects positive source, and anti-phase Schmitt triggers
7 feet of device connect the public negative pole of power supply；Described metal inductive probe across insulator near the input Y1 of ground wire E, metal sense
The other end that should pop one's head in one end with the 6th resistance and the 7th resistance respectively electrically connects；Another termination of described 6th resistance is public
Negative pole, the other end of described 7th resistance electrically connects with 13 feet of anti-phase Schmitt trigger；Described 8th resistance, the 9th resistance
Electrically connect with one end of the 8th electric capacity, the other end of the 8th resistance respectively with 11 feet and the two or two pole of anti-phase Schmitt trigger
The anode electrical connection of pipe, the other end of the 9th resistance electrically connects with 9 feet of anti-phase Schmitt trigger, the other end of the 8th electric capacity
8 feet with one end of the tenth resistance and anti-phase Schmitt trigger electrically connect respectively；The other end and first of described tenth resistance
The base stage electrical connection of audion, the emitter stage of the first audion connects public negative pole, the colelctor electrode of the first audion and relay
Pull-in winding one end electrically connects, and another termination positive source of the pull-in winding of relay, the normally opened contact two ends of relay are anti-
Two outfan Y2, Y3 of phase Schmitt electric field induction control circuit；The negative electrode of described second diode respectively with anti-phase Schmitt
One end electrical connection of 10 feet of trigger, one end of the 9th electric capacity and the 15th resistance, the other end and second of the 15th resistance
The base stage electrical connection of audion, the other end of the 9th electric capacity one end with the 11st resistance and the 12nd resistance respectively electrically connects；
The emitter stage of the second audion connects public negative pole, the colelctor electrode of the second audion and one end electrical connection of the 16th resistance, and the tenth
The other end of six resistance and the negative electrode electrical connection of the second light emitting diode, the second light-emitting diodes tube anode connects DC power anode；
The other end of described 11st resistance electrically connects with 4 feet of anti-phase Schmitt trigger, and the other end of described 12nd resistance divides
Not electrically connecting with 3 feet of anti-phase Schmitt trigger and the anode of the 4th diode, the negative electrode of the 4th diode is respectively with the 3rd
One end electrical connection of the negative electrode of diode, one end of the tenth electric capacity and the 14th resistance, another termination of the tenth electric capacity is public negative
One end electrical connection of pole, the anode of the 3rd diode and the 13rd resistance, the other end of the 13rd resistance and the 14th resistance
The other end all 2 feet with anti-phase Schmitt trigger electrically connect.
In the technical program, described hookup includes test switch and test resistance, described test switch and test
After resistant series, one end electrically connects with one end of testing coil, the other end respectively with zero line N input, the public affairs of switch driving circuit
One end electrical connection of the pull-in winding of negative pole end and relay altogether, the other end of testing coil ZL2 connects live wire L input, this
Outfan Y2 and Y3 of close special electric field induction control circuit is attempted by the two ends of test switch respectively.
In the technical program, described switch driving circuit includes processing and amplifying integrated package, controllable silicon, the 3rd to the 7th electricity
Hold and the 3rd resistance；The model of wherein said processing and amplifying integrated package is RT54123B, and it has eight pins, and processing and amplifying is integrated
The pin 2 of block and pin 3 electrically connect with two outfans of the first zero sequence current mutual inductor respectively, the pin of processing and amplifying integrated package
1 and pin 2 electrically connect with fault induction coil two outfan of the second zero sequence current mutual inductor respectively, processing and amplifying integrated package
Pin 4 is public negative pole end, respectively with one end of the 3rd electric capacity, one end of the 4th electric capacity, one end of the 6th electric capacity, the 7th electric capacity
One end and the electrical connection of silicon controlled negative electrode, the public input pin 2 of the other end of the 3rd electric capacity and processing and amplifying integrated package
Electrical connection, the other end of the 4th electric capacity electrically connects with the pin 5 of processing and amplifying integrated package, the other end of the 6th electric capacity respectively with put
One end electrical connection of the big positive pole feeder ear pin 8 processing integrated package and the 3rd resistance, the other end of the 7th electric capacity respectively with put
The big one end electrical connection processing the outfan pin 7 of integrated package, silicon controlled control pole and the 5th electric capacity；Another of 5th electric capacity
End electrically connects with the pin 6 of processing and amplifying integrated package；The other end of the 3rd resistance respectively with silicon controlled anode and rectification two pole
The negative electrode electrical connection of pipe, the anode of commutation diode electrically connects with tripping coil one end of electrical apparatus release.
This utility model compared with prior art, has the advantage that
The most no matter the leak current fault of any special circumstances occurs, such as zero live wire reversal connection and simultaneously ground wire electrification, or supply lines
Road single-phase (line) power-off etc., can cut off zero the most simultaneously, fire, three-phase (line) power supply circuits, it is ensured that the person preserves from；
As long as 2. band electric fault occurs in ground wire, no matter zero, live wire connects is just or instead, regardless of leakage protect dropout power-off or
Power-off of not threading off, can and alarm instruction, until failture evacuation.
Accompanying drawing explanation
Fig. 1 is this utility model circuit theory diagrams；
Fig. 2 is the circuit theory diagrams of Schmitt electric field induction control circuit of the present utility model.
Detailed description of the invention
Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is described further.At this it should be noted that
The explanation of these embodiments is adapted to assist in and understands this utility model, but be not intended that restriction of the present utility model.This
Outward, as long as technical characteristic involved in each embodiment of this utility model disclosed below does not constitutes punching each other
Dash forward and just can be combined with each other.
In description of the present utility model, term " first " and " the 16th " be only used for describe purpose, and it is not intended that
Instruction or hint relative importance.
As it is shown in figure 1, it is a kind of intelligent leakage protecting plug, including Schmitt electric field induction control circuit 1, fault
Current-sensing circuit 2, hookup 3, the electrical apparatus release 4 with one group of opening and closing contact, the relay 5 with three groups of normally opened contacts and switch
Drive circuit 6；Wherein
The metal inductive probe RC of described Schmitt electric field induction control circuit 1 across insulator near the input of ground wire E
End Y1, outfan Y2 and Y3 of Schmitt electric field induction control circuit 1 are electric with the test switch TEST two ends of hookup 3 respectively
Connect；
Described fault current sensor circuit 2 includes the first zero sequence current mutual inductor ZCT1, the second zero sequence current mutual inductor
ZCT2, the first resistance R1, the second resistance R2, the first electric capacity C1 and the second electric capacity C2；Described first zero sequence current mutual inductor ZCT1
Being set on ground wire E, described first resistance R1 and the first electric capacity C1 is connected in parallel on two outputs of the first zero sequence current mutual inductor ZCT1
On end, two outfans of the first zero sequence current mutual inductor ZCT1 one group of input bipod with switch driving circuit 6 respectively is electrically connected
Connect；Described second zero sequence current mutual inductor ZCT2 is set on the zero line N and live wire L of city's alternating current, the second zero sequence current mutual inductance
Device ZCT2 includes that fault induction coil ZL1 and testing coil ZL2, described second resistance R2 and the second electric capacity C2 are connected in parallel on fault sense
Answer on two outfans of coil ZL1, two outfans of fault induction coil ZL1 respectively with switch driving circuit 6 another input
End bipod electrical connection, an outfan of testing coil ZL2 electrically connects with civil power live wire L input, and another of testing coil ZL2 is defeated
Go out after end is connected with the test resistance R5 and test switch TEST of hookup 3 and electrically connect with zero line N input；
The positive electrical source of described switch driving circuit 6 is by the tripping coil JL1 mono-of commutation diode D1 with electrical apparatus release 4
End electrical connection, connects after one end parallel connection of the negative pole common port of described switch driving circuit 6 and the pull-in winding JL2 of relay 5 again
Receive the zero line N input of city's alternating current；The other end of the tripping coil JL1 of described electrical apparatus release 4 and the pull-in winding of relay 5
The JL2 other end after connecing, is electrically connected with live wire L input by one group of opening and closing contact of electrical apparatus release 4, the three of described relay 5
Group normally opened contact connects ground wire E, zero line N and the live wire L of city's alternating current the most respectively, and another side connects output loading end respectively.
In the present embodiment, described Schmitt electric field induction control circuit 1 includes anti-phase Schmitt trigger IC2, metal
Inductive probe RC, the first audion Q1, the second audion Q2, the second to the 4th diode D2-D4, the second light emitting diode
LED2, the 6th to the 16th resistance R6-R16, the 8th to the tenth electric capacity C8-C10 and relay J K2；Wherein said anti-phase this
The model of schmitt trigger IC2 is 74HC14D, and the pin 1 of anti-phase Schmitt trigger IC2 electrically connects with pin 12, anti-phase this
The pin 14 of schmitt trigger IC2 connects positive source, and 7 feet of anti-phase Schmitt trigger IC2 connect public negative pole；Described metal sense
Should pop one's head in RC across insulator near the input Y1 of ground wire E, the other end of metal inductive probe RC respectively with the 6th resistance R6
And the 7th resistance R7 one end electrical connection；Another of described 6th resistance R6 terminates public negative pole, and described 7th resistance R7's is another
One end electrically connects with 13 feet of anti-phase Schmitt trigger IC2；Described 8th resistance R8, the 9th resistance R9 and the 8th electric capacity C8
One end electrically connects, the other end of the 8th resistance R8 respectively with 11 feet of anti-phase Schmitt trigger IC2 and the second diode D2
Anode electrically connects, and the other end of the 9th resistance R9 electrically connects with 9 feet of anti-phase Schmitt trigger IC2, and the 8th electric capacity C8's is another
One end 8 feet with one end of the tenth resistance R10 and anti-phase Schmitt trigger IC2 respectively electrically connect；Described tenth resistance R10's
The base stage electrical connection of the other end and the first audion Q1, the emitter stage of the first audion Q1 meets public negative pole, the first audion Q1
Colelctor electrode electrically connect with pull-in winding one end of relay J K2, the pull-in winding of relay J K2 another termination positive source,
The normally opened contact two ends of relay J K2 are two outfan Y2, Y3 of anti-phase Schmitt electric field induction control circuit 1；Described second
The negative electrode of diode D2 respectively with 10 feet, one end of the 9th electric capacity C9 and the 15th resistance R15 of anti-phase Schmitt trigger IC2
One end electrical connection, the other end of the 15th resistance R15 electrically connects with the base stage of the second audion Q2, another of the 9th electric capacity C9
End one end with the 11st resistance R11 and the 12nd resistance R12 respectively electrically connects；The emitter stage of the second audion Q2 connects public negative
One end electrical connection of pole, the colelctor electrode of the second audion Q2 and the 16th resistance R16, the other end of the 16th resistance R16 and the
The negative electrode electrical connection of two LEDs 2, the second LED 2 anode connects positive source；Described 11st resistance
The other end of R11 electrically connects with 4 feet of anti-phase Schmitt trigger IC2, the other end of described 12nd resistance R12 respectively with instead
3 feet of phase Schmitt trigger IC2 and the anode electrical connection of the 4th diode D4, the negative electrode of the 4th diode D4 is respectively with the 3rd
One end electrical connection of the negative electrode of diode D3, one end of the tenth electric capacity C10 and the 14th resistance R14, another of the tenth electric capacity C10
Terminating public negative pole, the anode of the 3rd diode D3 and one end electrical connection of the 13rd resistance R13, the 13rd resistance R13's is another
The other end of one end and the 14th resistance R14 all 2 feet with anti-phase Schmitt trigger IC2 electrically connect.
During work, connecting Schmitt electric field induction control circuit 1 power supply, this product i.e. works in intelligent protection state；If
There is band electric fault in ground wire, and the metal inductive probe RC of neighbouring ground wire Y1 can sense its fault electric field signal produced, and
Input 13 foot of anti-phase Schmitt trigger IC2 it is input to, through reverse Schmitt trigger IC2 process by the 7th resistance R7
After, a road output signal is sent to the base of the first audion Q1 by the pin 8 of reverse Schmitt trigger IC2 and resistance R10
Pole, the first audion Q1 conducting, relay J K2 being connected between the first audion Q1 colelctor electrode and power supply energising work, its
Normally opened contact closes, and i.e. two outfan Y2, Y3 conductings of Schmitt electric field induction control circuit 1, are also equal to test switch
TEST closes conducting, and the testing coil ZL2 of such second zero sequence current mutual inductor ZCT2 produces test current, switch drive immediately
Circuit 6 turns on, and the tripping coil JL1 of electrical apparatus release 4 switches on power and passes through powerful electric current immediately and produce high-intensity magnetic field, forces it to thread off
And pull opening and closing contact to disconnect, and the power supply of the circuit such as the pull-in winding JL2 of block system relay 5 and switch drive, relay 5
Quitting work, three groups of normally opened contacts between the zero line N, live wire L and the ground wire E that are connected across respectively on relay 5 are all off, thorough
Undercut the power supply of the supply load that broken, serve the effect of protection personal safety.An other road output signal is by reversely this is close
The pin 10 of special trigger IC2 and resistance R15 are sent to the base stage of the second audion Q2, and the second audion Q2 passes through its colelctor electrode
The resistance R16 of concatenation and LED 2 and power supply ON operation, LED 2 lights, send ground wire electrification therefore
Barrier warning.Because this control circuit uses independent current source, and sensing is the ground wire fault electric field that need not be formed loop
Signal, therefore when ground wire electrification exception, zero live wire regardless of power supply is just to connect or reversal connection, all without having influence on Schmitt electricity
The fault of field inductive control circuit 1 senses and drives and alarm indication function, namely occurs various the most different at power frequency supply
In the case of Chang, all without the protection and the warning function that have influence on this intelligent leakage guarantor's plug.
In the present embodiment, described hookup 3 includes test switch TEST and test resistance R5, described test switch
After TEST connects with test resistance R5, one end electrically connects with one end of testing coil ZL2, the other end respectively with zero line N input,
One outfan Y2 of Schmitt electric field induction control circuit 1 and pull-in winding JL2 one end electrical connection of relay 5, test switch
The series connection point of TEST and test resistance R5 electrically connects with another outfan Y3 of Schmitt electric field induction control circuit 1, test wire
The other end of circle ZL2 connects live wire L input.Process of the test: press test switch TEST, through the second zero sequence current mutual inductance
The live wire L of device ZCT2 connects input zero-power line N by test resistance R5, produces test (simulation leak current fault) electric current
Signal, switch driving circuit 6 turns on, and the tripping coil JL1 of electrical apparatus release 4 produces high-intensity magnetic field, pulls its opening and closing contact to disconnect, continues
The pull-in winding JL2 power-off of electrical equipment 5 quits work, and three groups of normally opened contacts of relay 5 disconnect and cut off load power source.
In the present embodiment, described on-off circuit 6 includes processing and amplifying ic chip 1, controllable silicon Q, the 3rd to the 7th electricity
Hold C3-C7 and the 3rd resistance R3；The model of wherein said processing and amplifying ic chip 1 is RT54123B, and it has eight pins, puts
The big pin 2 processing ic chip 1 and pin 3 two outfans with the first zero sequence current mutual inductor ZCT1 respectively electrically connect, and put
The big pin 1 processing ic chip 1 and pin 2 two outfans with fault induction coil ZL2 respectively electrically connect, processing and amplifying collection
The pin 4 of in bulk IC1 respectively with one end of the 3rd electric capacity C3, one end of the 4th electric capacity C4, one end of the 6th electric capacity C6, the 7th electricity
The negative electrode of one end and controllable silicon Q of holding C7 electrically connects and connects publicly, the other end of the 3rd electric capacity C3 and processing and amplifying integrated package
The pin 2 of IC1 electrically connects, and the other end of the 4th electric capacity C4 electrically connects with the pin 5 of processing and amplifying ic chip 1, the 6th electric capacity
The other end of C6 one end with the pin 8 and the 3rd resistance R3 of processing and amplifying ic chip respectively electrically connects, the 7th electric capacity C7's
The other end respectively with the pin 7 i.e. outfan of processing and amplifying ic chip 1, controllable silicon Q control pole and the one of the 5th electric capacity C5
End electrical connection；The other end of the 5th electric capacity C5 electrically connects with the pin 6 of processing and amplifying ic chip 1；Another of 3rd resistance R3
End electrically connects with the anode of controllable silicon Q and the negative electrode of commutation diode D1 respectively, the anode of commutation diode D1 and electrical apparatus release 4
Tripping coil one end electrically connects.During work, if the first zero sequence current mutual inductor ZCT1 or the second zero sequence current mutual inductor ZCT2 sense
Should arrive fault-current signal, processing and amplifying ic chip 1 will export to the control end of controllable silicon Q after fault-signal processing and amplifying,
Controllable silicon Q turns on, and the tripping coil JL1 of electrical apparatus release 4 produces high-intensity magnetic field, pulls its opening and closing contact to disconnect, the adhesive line of relay 5
Circle JL2 power-off quits work, and three groups of normally opened contacts of relay 5 disconnect and cut off load power source, serve the effect of power-off protection.
In the present embodiment, described electrical apparatus release 4 includes the switch with one group of opening and closing contact and tripping coil JL1, described in continue
Electrical equipment 5 is the assembly of the switch with three groups of normally opened contacts and pull-in winding JL2；One end of described electrical apparatus release opening and closing contact and city
The live wire L input electrical connection of alternating current, the other end of electrical apparatus release opening and closing contact and one end of tripping coil JL1 and relay 5
Pull-in winding JL2 one end electrical connection, the rectified current of the other end connecting valve drive circuit 6 of the tripping coil JL1 of electrical apparatus release
Source, the other end of the pull-in winding JL2 of relay 5 electrically connects with the zero line N input of city's alternating current respectively.
Residual operating current protection process: pressing SR, switch driving circuit is powered also by trip coil JL1
It is operated in static armed state, simultaneously the pull-in winding JL2 energising work of relay 5, the zero line N being connected across on relay 5, fire
Three groups of normally opened contacts between line L and ground wire E all close UNICOM's power supply powering load；When major loop or ground wire E once go out
Existing leakage current fault (such as human electric shock etc.), the second zero sequence current mutual inductor ZCT2 or sheathed being set on power line L, N
The first zero sequence current mutual inductor ZCT1 on ground wire E will sense the fault-current signal of major loop or ground wire immediately, and
Send it to input i.e. pin 2, pin 3 or the pin 1 of processing and amplifying ic chip 1, pin 2, by 7 after amplified process
Foot exports the control pole of controllable silicon Q, triggers controllable silicon Q and turns on immediately, and the tripping coil JL1 of electrical apparatus release 4 switches on power and produces
Raw high-intensity magnetic field, forces it to thread off and pulls opening and closing contact to disconnect, the power supply of the pull-in winding JL2 of block system relay 5, relay 5
Quitting work, three groups of normally opened contacts between the zero line N, live wire L and the ground wire E that are connected across respectively on relay 5 are all off, thorough
Undercut the power supply of the supply load that broken, serve leakage protection.
Connect the power supply of Schmitt electric field induction control circuit 1 during this product work, i.e. work in intelligent protection state；Disconnected
Open the power supply of Schmitt electric field induction control circuit 1, i.e. work in common three and extremely break residual current protecting state；By the first zero sequence
The 3rd pipe protection barrier that earth-fault current supervisory circuit is this product of the element compositions such as current transformer ZCT1.
Because the power supply of the relay of this product 5 pull-in winding JL2 is to be controlled by the opening and closing contact of electrical apparatus release, so when prominent
When meeting power failure or single-phase power-off, relay 5 will quit work (tripping operation), cuts off negative by three groups of normally opened contacts of relay 5
Carrying power supply, when power up is normal, this product will keep initial power-on-reset duty automatically；When power supply runs into respectively
Kind of electric leakage accident, or empirically after button dropout power-off automatically, this product also hand-reset must can be energized and resume work,
If leak current fault is not got rid of, even if this product manually also cannot reset, until leak current fault is got rid of；So being fully able to meet
The requirement of GB.
Above in association with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to institute
The embodiment described.For the ordinary skill in the art, without departing from principle of the present utility model and objective
In the case of these embodiments are carried out multiple change, revise, replace and deform and still fall within protection domain of the present utility model
In.
Claims (4)
1. an intelligent leakage protecting plug, it is characterised in that include Schmitt electric field induction control circuit (1), fault current
Sensor circuit (2), hookup (3), electrical apparatus release (4), relay (5) and switch driving circuit (6)；Wherein
The metal inductive probe (RC) of described Schmitt electric field induction control circuit (1) across insulator near the input of ground wire E
End Y1, the outfan Y2 and outfan Y3 of Schmitt electric field induction control circuit (1) respectively with the test switch of hookup (3)
(TEST) two ends electrical connection；
Described fault current sensor circuit (2) includes the first zero sequence current mutual inductor (ZCT1), the second zero sequence current mutual inductor
(ZCT2), the first resistance (R1), the second resistance (R2), the first electric capacity (C1) and the second electric capacity (C2)；Described first zero-sequence current
Transformer (ZCT1) is set on ground wire E, and it is mutual that described first resistance (R1) and the first electric capacity (C1) are connected in parallel on the first zero-sequence current
On two outfans of sensor (ZCT1), two outfans of the first zero sequence current mutual inductor (ZCT1) respectively with switch driving circuit
(6) one group of input bipod electrical connection；Described second zero sequence current mutual inductor (ZCT2) be set in city's alternating current zero line N and
On live wire L, the second zero sequence current mutual inductor (ZCT2) includes fault induction coil (ZL1) and testing coil (ZL2), described second
Resistance (R2) and the second electric capacity (C2) are connected in parallel on two outfans of fault induction coil (ZL1), fault induction coil (ZL1)
Two outfans electrically connect with another input bipod of switch driving circuit (6) respectively, an outfan of testing coil (ZL2) with
Civil power live wire L input electrically connects, the test resistance (R5) of another outfan of testing coil (ZL2) and hookup (3) and
Electrically connect with zero line N input after test switch (TEST) series connection；
Described electrical apparatus release (4) includes the switch with one group of opening and closing contact and tripping coil (JL1), and described relay (5) is band three
The switch of group normally opened contact and the assembly of pull-in winding (JL2)；One end, opening and closing contact of described electrical apparatus release (4) and city's alternating current
The electrical connection of live wire L input, the opening and closing contact other end of electrical apparatus release (4) and one end of tripping coil (JL1) and relay
(5) pull-in winding (JL2) one end electrical connection；
The outfan of described switch driving circuit (6) is electrically connected with tripping coil (JL1) other end by commutation diode (D1),
Reconnect after the other end parallel connection of the negative pole common port of described switch driving circuit (6) and the pull-in winding (JL2) of relay (5)
Zero line N input to city's alternating current；Three groups of normally opened contact one end of described relay (5) connect the ground wire of city's alternating current respectively
E, zero line N and live wire L, the other end connects output loading end respectively.
Intelligent leakage protecting plug the most according to claim 1, it is characterised in that described Schmitt electric field induction controls
Circuit (1) includes anti-phase Schmitt trigger (IC2), metal inductive probe (RC), the first audion (Q1), the second audion
(Q2), the second to the 4th diode (D2-D4), the second light emitting diode (LED2), the 6th to the 16th resistance (R6-R16),
8th to the tenth electric capacity (C8-C10) and relay (JK2)；The model of wherein said anti-phase Schmitt trigger (IC2) is
74HC14D, the pin 1 of anti-phase Schmitt trigger (IC2) electrically connects with pin 12, the pipe of anti-phase Schmitt trigger (IC2)
Foot 14 connects positive source, and 7 feet of anti-phase Schmitt trigger (IC2) connect the public negative pole of power supply；Described metal inductive probe
(RC) across insulator near the input Y1 of ground wire E, the other end of metal inductive probe (RC) respectively with the 6th resistance (R6)
And the 7th resistance (R7) one end electrical connection；Another of described 6th resistance (R6) terminates public negative pole, described 7th resistance
(R7) the other end electrically connects with 13 feet of anti-phase Schmitt trigger (IC2)；Described 8th resistance (R8), the 9th resistance (R9)
Electrically connect with one end of the 8th electric capacity (C8), the other end of the 8th resistance (R8) respectively with anti-phase Schmitt trigger (IC2)
The anode electrical connection of 11 feet and the second diode (D2), the other end of the 9th resistance (R9) and anti-phase Schmitt trigger (IC2)
9 feet electrical connections, the other end of the 8th electric capacity (C8) respectively with one end and the anti-phase Schmitt trigger of the tenth resistance (R10)
(IC2) 8 foot electrical connections；The other end of described tenth resistance (R10) and the base stage electrical connection of the first audion (Q1), the one or three
The emitter stage of pole pipe (Q1) connects pull-in winding one end of public negative pole, the colelctor electrode of the first audion (Q1) and relay (JK2)
Electrical connection, another termination positive source of the pull-in winding of relay (JK2), the normally opened contact two ends of relay (JK2) are anti-phase
Two outfan Y2, Y3 of Schmitt electric field induction control circuit (1)；The negative electrode of described second diode (D2) respectively with anti-phase this
One end electrical connection of 10 feet of schmitt trigger (IC2), one end of the 9th electric capacity (C9) and the 15th resistance (R15), the 15th
The other end of resistance (R15) and the base stage electrical connection of the second audion (Q2), the other end of the 9th electric capacity (C9) is respectively with the tenth
One end electrical connection of one resistance (R11) and the 12nd resistance (R12)；The emitter stage of the second audion (Q2) connects public negative pole, the
One end electrical connection of the colelctor electrode of two audions (Q2) and the 16th resistance (R16), the other end of the 16th resistance (R16) and the
The negative electrode electrical connection of two light emitting diodes (LED2), the second light emitting diode (LED2) anode connects DC power anode；Described
The other end of 11 resistance (R11) electrically connects with 4 feet of anti-phase Schmitt trigger (IC2), described 12nd resistance (R12)
The other end electrically connects with 3 feet of anti-phase Schmitt trigger (IC2) and the anode of the 4th diode (D4) respectively, the 4th diode
(D4) negative electrode respectively with negative electrode, one end of the tenth electric capacity (C10) and the one of the 14th resistance (R14) of the 3rd diode (D3)
End electrical connection, another of the tenth electric capacity (C10) terminates public negative pole, the anode of the 3rd diode (D3) and the 13rd resistance
(R13) one end electrical connection, the other end of the 13rd resistance (R13) and the other end of the 14th resistance (R14) all with anti-phase this
2 foot electrical connections of schmitt trigger (IC2).
Intelligent leakage protecting plug the most according to claim 1, it is characterised in that described hookup (3) also includes examination
Electrical verification resistance (R5), after described test switch (TEST) is connected with test resistance (R5), one end is electric with one end of testing coil (ZL2)
Connect, the other end respectively with zero line N input, the public negative pole end of switch driving circuit (6) and the pull-in winding of relay (5)
(JL2) one end electrical connection, the other end of testing coil (ZL2) connects live wire L input, Schmitt electric field induction control circuit
(1) outfan Y2 and Y3 is attempted by the two ends of test switch (TEST) respectively.
4. according to the intelligent leakage protecting plug described in claim 1 or 3, it is characterised in that described switch driving circuit (6)
Including processing and amplifying integrated package (IC1), controllable silicon (Q), the 3rd to the 7th electric capacity (C3-C7) and the 3rd resistance (R3)；Wherein institute
The model stating processing and amplifying integrated package (IC1) is RT54123B, and it has eight pins, the pin 2 of processing and amplifying integrated package (IC1)
And pin 3 two outfans with the first zero sequence current mutual inductor (ZCT1) respectively electrically connect, the pipe of processing and amplifying integrated package (IC1)
Foot 1 and pin 2 electrically connect with fault induction coil (ZL1) two outfan of the second zero sequence current mutual inductor (ZCT2) respectively, put
The pin 4 processing greatly integrated package (IC1) is public negative pole end, respectively with one end of the 3rd electric capacity (C3), the 4th electric capacity (C4)
The negative electrode electrical connection of one end, one end of the 6th electric capacity (C6), one end of the 7th electric capacity (C7) and controllable silicon (Q), the 3rd electric capacity
(C3) the other end electrically connects with the public input pin 2 of processing and amplifying integrated package (IC1), the other end of the 4th electric capacity (C4)
Electrically connect with the pin 5 of processing and amplifying integrated package (IC1), the other end of the 6th electric capacity (C6) respectively with processing and amplifying integrated package
(IC1) one end electrical connection of positive pole feeder ear pin 8 and the 3rd resistance (R3), the other end of the 7th electric capacity (C7) respectively with put
Process greatly one end electrical connection of the outfan pin 7 of integrated package (IC1), the control pole of controllable silicon (Q) and the 5th electric capacity (C5)；The
The other end of five electric capacity (C5) electrically connects with the pin 6 of processing and amplifying integrated package (IC1)；The other end of the 3rd resistance (R3) is respectively
Electrically connect with the anode of controllable silicon (Q) and the negative electrode of commutation diode (D1), the anode of commutation diode (D1) and electrical apparatus release (4)
Tripping coil (JL1) one end electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620410237.1U CN205846362U (en) | 2016-05-09 | 2016-05-09 | Intelligent leakage protecting plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620410237.1U CN205846362U (en) | 2016-05-09 | 2016-05-09 | Intelligent leakage protecting plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205846362U true CN205846362U (en) | 2016-12-28 |
Family
ID=57628202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620410237.1U Withdrawn - After Issue CN205846362U (en) | 2016-05-09 | 2016-05-09 | Intelligent leakage protecting plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205846362U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896196A (en) * | 2016-05-09 | 2016-08-24 | 佛山市顺德区信辉达电子有限公司 | Intelligent electric leakage protection plug |
-
2016
- 2016-05-09 CN CN201620410237.1U patent/CN205846362U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105896196A (en) * | 2016-05-09 | 2016-08-24 | 佛山市顺德区信辉达电子有限公司 | Intelligent electric leakage protection plug |
| CN105896196B (en) * | 2016-05-09 | 2018-05-01 | 佛山市顺德区信辉达电子有限公司 | Intelligent leakage protecting plug |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161228 Effective date of abandoning: 20180501 |
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| AV01 | Patent right actively abandoned |