CN103378592B - The abnormal Aftercurrent protecting equipment of wiring - Google Patents
The abnormal Aftercurrent protecting equipment of wiring Download PDFInfo
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- CN103378592B CN103378592B CN201210118175.3A CN201210118175A CN103378592B CN 103378592 B CN103378592 B CN 103378592B CN 201210118175 A CN201210118175 A CN 201210118175A CN 103378592 B CN103378592 B CN 103378592B
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Abstract
The present invention relates to the abnormal Aftercurrent protecting equipment of wiring, comprising: phase conductor, neutral conductor, gnd conductor, switching device, residual current detection circuit, voltage difference detection circuits, the first signal processing circuit, secondary signal process circuit and exciting bank.Wherein, residual current detection electric circuit inspection phase conductor and the residual current of neutral conductor, voltage difference between voltage difference detection circuits detection gnd conductor and neutral conductor, the output signal to voltage difference detection circuits for first signal processing circuit carries out predetermined process, secondary signal processes circuit and produces driving signal in response to one of the predetermined error conditions of output signal of the output signal of residual current detection circuit and the first signal processing circuit, exciting bank orders about switching device be in the second place in response to driving signal, thus cut off the electrical connection of input side and outlet side.The people that is implemented without of above-mentioned functions participates in, and is automatically performed detection holding function, and the online voltage-withstand test that can meet again electrical appliance manufacturer requires.
Description
Technical field
The present invention relates to Electrical Safety protection field, particularly relate to the abnormal residual current of wiring and protect
Protection unit.
Background technology
Lack of standardization due to terminal block, the supply socket of household electrical appliance there may exist mistake
Wiring, for example, intersect wiring by the phase line of socket and zero line, or be connected ground wire with phase line, or
The insulation ag(e)ing in Long-Time Service of person's electrical appliance, causes the ground wire electrification of power supply, and these are all easy
Cause the generation of electric shock accidents.
Existing Aftercurrent protecting equipment, for the situation of detection ground wire electrification, generally uses
Whether wear detection ring in ground wire to detect and have electric current to flow through in ground wire, the drawback of the method is must
When having electric current to flow through and reach setting value in palpus ground wire, device just plays protection.Also have by little resistance
The electronic components such as value resistance, electric capacity or transformer be connected across zero line and ground wire or phase line and ground wire it
Between, being judged by sampling voltage difference, magnitude of pressure differential is required by these traditional detection methods,
I.e. after pressure reduction reaches certain value just can action, and this pressure reduction to be possible to ratio relatively hazardous,
Which forms potential safety hazard；Furthermore, these methods can not meet the requirement of online voltage-withstand test；
Additionally, above method protection device move, in electrical appliance plug swapping process or power switch
Can there is the possibility of misoperation during combined floodgate.
It would therefore be desirable to have the abnormal Aftercurrent protecting equipment of the wiring of a kind of novelty, regardless of this dress
Put and be in which kind of state, the false wiring condition using supply socket can be detected, cut off and use
The power supply of electrical equipment simultaneously can prevent misoperation in use occur.
Content of the invention
One main purpose of the present invention is, overcomes drawbacks described above of the prior art, carries
For a kind of be capable of detecting when zero live wire whether intersect wiring or the whether charged wiring of ground wire abnormal
Aftercurrent protecting equipment.
In one embodiment, the abnormal Aftercurrent protecting equipment of a kind of wiring is provided, its
Including:
Phase conductor, neutral conductor, gnd conductor；
Switching device, makes described phase conductor, zero line lead when being configured to be in primary importance
Body, gnd conductor are in the conduction state, and make when being in the second place described phase conductor,
Neutral conductor, gnd conductor are in off state；
Residual current detection circuit, is configured to detect the surplus of described phase conductor and neutral conductor
Aftercurrent；
Voltage difference detection circuits, is configured to pass divider resistance dividing potential drop and leads to detect described ground wire
Voltage difference between body and neutral conductor；
First signal processing circuit, is coupled to described voltage difference detection circuits, is configured to institute
The output signal stating voltage difference detection circuits carries out predetermined process；
Secondary signal processes circuit, is coupled to described residual current detection circuit and described first
Signal processing circuit, is configured to the output signal in response to described residual current detection circuit and institute
One of predetermined error conditions of output signal stating the first signal processing circuit and produce driving letter
Number；
Exciting bank, is coupled to described secondary signal and processes circuit, be configured in response to described
Signal is driven to order about described switching device and be in the described second place.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described first signal
Process in circuit and comprise comparator circuit, for the output signal in described voltage difference detection circuits
During more than predetermined threshold, export predetermined signal.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described voltage difference is examined
Slowdown monitoring circuit also includes at least one diode, and described diode is used for extracting unidirectional half-wave voltage signal.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described voltage difference is examined
Slowdown monitoring circuit also includes filtering and mu balanced circuit, described filtering and mu balanced circuit for filtering voltage stabilizing
Through the signal of divider resistance dividing potential drop so that the output signal of described voltage difference detection circuits for
Described first signal processing circuit is safe.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described secondary signal
Process circuit and include thyristor.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described first signal
The output processing circuit is directly coupled to the control pole of described thyristor.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described wiring is abnormal
Aftercurrent protecting equipment has the first power supply and second source is respectively at described first signal
Reason circuit and described secondary signal process circuit and power.
In an embodiment of the abnormal Aftercurrent protecting equipment of wiring, described residual current
Testing circuit includes a current transformer, described phase conductor and neutral conductor as this electric current
The first of transformer is primary, and the secondary of this current transformer is coupled to described secondary signal and processes electricity
Road.
The abnormal Aftercurrent protecting equipment of wiring provided by the present invention has the advantage that electricity
Line structure is simple, is not affecting original phase line, the basis of the resistance to pressure request of insulation to ground wire for the zero line
On, add the arbitration functions of false wiring to the supply socket that electrical appliance uses, particularly
Can remain to relatively during the safe voltage of for example as little as 36V when between zero line and ground wire, pressure reduction is relatively low
Judge well the dangerous wiring state of ground wire electrification when supply socket, and break in the case
Open the electrical connection of electrical appliance and supply socket, the personal safety of protection electrical appliance user, and energy
Avoid moving in protection device, depositing in electrical appliance plug swapping process or when power switch closes a floodgate
Possibility in misoperation.Further, above-mentioned detection holding function all can be automatically performed, again simultaneously
The online voltage-withstand test that can meet electrical appliance manufacturer requires.
Brief description
Read the following detailed description to non-limiting example by referring to accompanying drawing,
The other features, objects and advantages of the present invention will become more apparent upon:
Fig. 1 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 100；
Fig. 2 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 200；And
Fig. 3 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 300.
In the drawings, run through different diagrams, same or similar reference represent identical or
Similar device (module).
Detailed description of the invention
Fig. 1 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 100.As it can be seen, the abnormal Aftercurrent protecting equipment 100 of wiring includes:
The 140th, phase conductor the 110th, neutral conductor the 120th, gnd conductor the 130th, switching device remains electricity
Current detection circuit the 150th, voltage difference detection circuits the 160th, the first signal processing circuit the 170th, second
Signal processing circuit 180 and exciting bank 190.
Phase conductor 110 includes input terminal 111 and outlet terminal 117.Zero line is led
Body 120 includes input terminal 121 and outlet terminal 127.Gnd conductor 130 includes defeated
Enter terminals 131 and outlet terminal 137.The 121st, the 111st, input terminal 131 generally pressed
According to certain standard arrangement, fix, and stretch out from the shell of Wiring protection device 100, thus
Form plug.Outlet terminal the 117th, the 127th, 137 be respectively used to connect electrical appliance respective end
Son.
The 110th, switching device 140 makes described phase conductor when being configured to be in primary importance
Neutral conductor the 120th, gnd conductor 130 is in the conduction state, and makes when being in the second place
Obtain described phase conductor the 110th, neutral conductor the 120th, gnd conductor 130 and be in off state.
Specifically, the 141st, the switching device 140 in this embodiment includes the switch in phase conductor 110
Switch 142 in neutral conductor 120 and the switch 143 in gnd conductor 130.Switch dress
Put 140 to be in primary importance and be in closure state corresponding to three switches, be in the second place
It is in off-state corresponding to three switches.
Residual current detection circuit 150 is configured to detection phase conductor 110 and neutral conductor
The residual current of 120.Specifically, residual current detection circuit 150 includes a Current Mutual Inductance
151, phase conductor 110 and neutral conductor 120 form the first primary of current transformer 151,
The secondary induction of current transformer 151 is generated residual current detection signal, and by this signal coupling
Close secondary signal and process circuit 180.
Voltage difference detection circuits 160 is configured to detection gnd conductor 130 and neutral conductor 120
Between voltage difference.Specifically, in this embodiment, voltage difference detection circuits 160 includes:
Diode D2, divider resistance R8 and R10, resistance R9, electric capacity C9 and voltage-stabiliser tube ZD.
In this embodiment, diode D2 is arranged to extract unidirectional half-wave voltage signal；Then detect
High resistance measurement R10 detection voltage difference more than signal process megaohm, and connect after R10
Meet a relatively small resistance R8 such that it is able to sampling obtains small voltage signal, it is simple to follow-up
Process.For example, described high resistance measurement R8 and R10 selects 500k Ω and 5M Ω respectively.
Then the filter circuit filtering through being made up of R9 and C9 again, it is thus achieved that disturb less voltage
Difference sampled signal；It is then passed through the voltage differential signal coupling after voltage-stabiliser tube ZD voltage stabilizing again of filtering
It is bonded to the first signal processing circuit 170.Voltage-stabiliser tube ZD is for limiting voltage difference after filtering
Sampled signal, to avoid in abnormal cases, owing to voltage difference sampled signal is excessive to voltage difference
Testing circuit causes damage.
First signal processing circuit 170 include chip IC the 2nd, reference voltage provide circuit and
Output signal processing circuit.Chip IC 2 can be comparator or operational amplifier.In Fig. 1 institute
In the embodiment shown, illustrate as a example by chip IC 2 is comparator.Reference voltage provides electricity
Road includes R11, R12 and C10.Output signal processing circuit includes R13, R14 and C11.
Operationally, the signal being exported by voltage difference detection circuits 160 is coupled to the first signal
Process the input of circuit 170 chips IC2, next in chip IC 2, by voltage difference
The signal of testing circuit 160 output is compared with the reference voltage being provided by reference voltage circuit
Relatively, when the signal of voltage difference detection circuits 160 output is more than reference voltage, chip IC 2 is defeated
Go out the first output signal.First output signal e.g. positive level signal.First output signal exists
Electricity is processed by diode D5 coupled to secondary signal after processing through output signal processing circuit
Road 180.
Secondary signal processes circuit 180, is coupled to described residual current detection circuit 150 He
Described first signal processing circuit 170, is configured in response to described residual current detection circuit 150
Output signal and the predetermined error conditions of output signal of described first signal processing circuit 170
One of and produce driving signal.
Specifically, secondary signal process circuit 180 includes control chip IC 1 and controllable silicon unit
Part Q1 etc..The predetermined error conditions of the output signal of residual current detection circuit is more than one
Predetermined value, the predetermined error conditions of voltage difference detection signal is to exceed another predetermined value；The two
Safety standard that predetermined value is followed according to the abnormal Aftercurrent protecting equipment 100 of wiring and phase
The detection sensitivity of device is answered to determine.
In the embodiment shown in fig. 1, the output signal of the first signal processing circuit 170 is straight
Connect the control pole being coupled to thyristor Q1.Output when the first signal processing circuit 170
When signal is positive level, thyristor Q1 is triggered conducting.
The secondary of current transformer 151 is coupled to control chip IC1.Work as residual current detection
When the output signal of circuit reaches its predetermined error conditions, control chip IC 1 exports a positive electricity
Ordinary mail number to the control pole of thyristor Q 1, thyristor Q1 thus the conducting that is triggered.
When thyristor Q 1 turns on, super-high-current will be flowed, thus cause solenoid SOL
On correspondingly flow super-high-current, this big current signal is driving signal.
Exciting bank 190 is coupled to secondary signal and processes circuit 180, is configured in response to institute
State driving signal and order about described switching device 140 and be in the described second place.
Specifically, exciting bank 190 includes solenoid SOL.Solenoid SOL two ends are respectively
It is connected to phase conductor 110 and diode D1, by the halfwave rectifier through commutation diode D1
Signal is the first signal processing circuit 170 and secondary signal processes circuit 180 and provides power supply.
Coupling between exciting bank 190 with switching device 140 generally can use machinery biography
Dynamic coupling.The electromagnet that solenoid SOL is wound around also includes the rank that can move along the radial
Iron.Three of switching device 140 switches the 141st, the 142nd, 143 via SR return pin,
The elements such as substantially radially vertical with return pin snap close, are coupled to armature by machine driving.When
When switching device 140 is in primary importance, three switches are in closure state, and circuit is normal
Work.Produce driving signal when secondary signal processes circuit 180 because of circuit abnormality, thus
Flow super-high-current in solenoid SOL, cause armature to move thus pull or clash into snap close,
Snap close departs from and the engaging thus discharge return pin of return pin, and return pin drive related elements makes
Switch the 141st, the 142nd, 143 disconnect, switching device 140 thus be in the second place, wiring protect
Electrical connection between protection unit 100 input side and outlet side is cut off, and electrical safety is protected
Card.
When from input side incoming transport power supply, Simultaneous Switching device 140 is in primary importance simultaneously
And during normal circuit operation, light emitting diode D6 energising is shinny, to indicate normal operating conditions.
Including the branch road two ends of resistance R5 and switch 102 are connected across current transformer 151 both sides respectively
Phase conductor and neutral conductor.When Guan Bi switch 102, as current transformer 151
Primary phase conductor and neutral conductor on produce residual current, thus cause at secondary signal
Reason circuit 180 produces and drives signal, and exciting bank 190 makes switching device 140 in response to this
Return to the second place, cut off the electrical connection between input side and outlet side.
When gnd conductor 130 is connected with live wire conductor 110, gnd conductor 130 and zero line
Potential difference is existed between conductor 120；Or when live wire conductor 110 is handed over neutral conductor 120
During fork-join line, due to equipotential between gnd conductor 130 and zero-power line conductor 120, now
Potential difference will be produced between the neutral conductor 120 of gnd conductor 130 and false wiring.Voltage
Difference detecting circuit 160 is by the detection to the voltage between neutral conductor and gnd conductor, by voltage
Export to the first signal processing circuit 170 after difference signal sampling filter voltage stabilizing, at the first signal
Process in the chip IC 2 in circuit 170 and compare with reference voltage signal, exceed setting value
When, output high level drives signal process circuit 180 to secondary signal and thus cause the second letter
Number process circuit 180 produce drive signal, exciting bank 190 in response to this drive signal and make
Obtain switching device 140 and return to the second place, cut off the electrical connection between input side and outlet side.
Fig. 2 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 200.As it can be seen, the abnormal Aftercurrent protecting equipment 200 of wiring includes:
The 240th, phase conductor the 210th, neutral conductor the 220th, gnd conductor the 230th, switching device remains electricity
Current detection circuit the 250th, voltage difference detection circuits the 260th, the first signal processing circuit the 270th, second
Signal processing circuit 280 and exciting bank 290.
It is abnormal surplus that the circuit setting of the abnormal Aftercurrent protecting equipment 200 of wiring is similar to wiring
Aftercurrent protection device 100, the main distinction has at two, and one is the first signal processing circuit
The chip IC 1 that chip IC 2 in 270 does not use secondary signal to process in circuit 280 is adopted
The first power supply, but use additional designs second source be powered, this independent electricity
Source is made up of resistance R15, electric capacity C12 and voltage-stabiliser tube ZD, such be designed to so that
Chip IC 2 in first signal processing circuit 270 more stably works；Difference at another is electricity
Pressure differential detection circuit 260 changes, compared to the voltage difference detection in first embodiment 100
Circuit 160, in the voltage difference detection circuits 260 of the present embodiment 200, neutral conductor 220
With the voltage differential signal between gnd conductor 230 first passes through high resistance measurement R10 and R8 and carries out
Dividing potential drop, is then passed through diode D2 and takes half-wave voltage signal, then passes through R9, C9 and R7 again
Filtering, wherein alternatively, R7 also can be replaced by voltage-stabiliser tube.
In this embodiment, when from input side incoming transport power supply, Simultaneous Switching device 240
When being in primary importance and normal circuit operation, light emitting diode D6 energising is shinny, to refer to
Show normal operating conditions.Including the branch road two ends of resistance R5 and switch 202 are connected across electricity respectively
The phase conductor of current transformer 251 both sides and neutral conductor.When Guan Bi switch 202, making
Produce residual current in the primary phase conductor of current transformer 251 and neutral conductor, from
And cause secondary signal to process circuit 280 and produce driving signal, exciting bank 290 is in response to this
And make switching device 240 return to the second place, cut off the electricity between input side and outlet side
Connect.
When gnd conductor 230 is connected with live wire conductor 210, gnd conductor 230 and zero line
Potential difference is existed between conductor 220；Or when live wire conductor 210 is handed over neutral conductor 220
During fork-join line, due to equipotential between gnd conductor 230 and zero-power line conductor 220, now
Potential difference will be produced between the neutral conductor 220 of gnd conductor 230 and false wiring.Voltage
Difference detecting circuit 260 is by the detection to the voltage between neutral conductor and gnd conductor, by voltage
Export to the first signal processing circuit 270 after difference signal sampling filter voltage stabilizing, at the first signal
Process in the chip IC 2 in circuit 270 and compare with reference voltage signal, exceed setting value
When, output high level drives signal process circuit 280 to secondary signal and thus cause the second letter
Number process circuit 280 produce drive signal, exciting bank 290 in response to this drive signal and make
Obtain switching device 240 and return to the second place, cut off the electrical connection between input side and outlet side,
Electrical safety is ensured.
Fig. 3 shows the abnormal residual current protecting of wiring according to an embodiment of the invention
The circuit diagram of device 300.As it can be seen, the abnormal Aftercurrent protecting equipment 300 of wiring includes:
The 340th, phase conductor the 310th, neutral conductor the 320th, gnd conductor the 330th, switching device remains electricity
Current detection circuit the 350th, voltage difference detection circuits the 360th, the first signal processing circuit the 370th, second
Signal processing circuit 380 and exciting bank 390.
It is abnormal surplus that the circuit setting of the abnormal Aftercurrent protecting equipment 300 of wiring is similar to wiring
Aftercurrent protection device 100, differs primarily in that, is exported by the first signal processing circuit 370
Signal and non-immediate driving secondary signal process the thyristor Q1 in circuit 380, and
It is this to be connected to secondary signal process the chip IC 1 in circuit 380, defeated after IC1 is processed
The signal going out is for driving thyristor Q1.
In this embodiment, when from input side incoming transport power supply, Simultaneous Switching device 340
When being in primary importance and normal circuit operation, light emitting diode D1 energising is shinny, to refer to
Show normal operating conditions.When gnd conductor 330 is connected with live wire conductor 310, gnd conductor
Potential difference is existed between 330 and neutral conductor 320；Or work as live wire conductor 310 and zero line
Conductor 320 intersect wiring when, due between gnd conductor 330 and zero-power line conductor 320 etc.
Current potential, will produce electricity between the neutral conductor 320 of now gnd conductor 330 and false wiring
Potential difference.Voltage difference detection circuits 360 is by the inspection to the voltage between neutral conductor and gnd conductor
Survey, will export to the first signal processing circuit 370 after voltage differential signal sampling filter voltage stabilizing,
Chip IC 2 in the first signal processing circuit 370 compares with reference voltage signal,
When exceeding setting value, output high level drives signal to process the core in circuit 380 to secondary signal
One input of piece IC1, when the signal inputting this input is more than threshold level, chip
One output output the second control signal (such as high level signal) of IC1.Second control
Signal directly drives thyristor Q1, and thus causes secondary signal process circuit 380 to produce
Raw driving signal, exciting bank 390 drives signal to make switching device 340 extensive in response to this
Arriving the second place again, cutting off the electrical connection between input side and outlet side, electrical safety is protected
Card.
Those skilled in the art will be understood that above-described embodiment is all illustrative and not restrictive
's.The different technologies feature occurring in different embodiments can be combined, beneficial to obtain
Effect.Those skilled in the art study accompanying drawing, specification and claims on the basis of,
Will be understood that and realize other embodiments changing of disclosed embodiment.At claims
In, term " including " is not precluded from other devices or step；Indefinite article " one " is not arranged
Except multiple；Term " first ", " second " are used for indicating title not for any spy of expression
Fixed order.Any reference in claim is all understood not to protection domain
Limit.Some technical characteristic occurs in that be not meant in different dependent claims can not be by
These technical characteristics are combined to obtain beneficial effect.This patent covers on literal or is waiting
Fall into all methods, device and the product of scope of the following claims with principle.
Claims (7)
1. a wiring exception Aftercurrent protecting equipment, it is characterised in that include:
Phase conductor (110), neutral conductor (120), gnd conductor (130)；
Switching device (140), make when being configured to be in primary importance described phase conductor,
Neutral conductor, gnd conductor are in the conduction state, and make described phase when being in the second place
Line conductor, neutral conductor, gnd conductor are in off state；
Residual current detection circuit (150), is configured to detect described phase conductor and zero line is led
The residual current of body；
Voltage difference detection circuits (160), is configured to pass divider resistance dividing potential drop and detects described
Voltage difference between gnd conductor and neutral conductor；
First signal processing circuit (170), is coupled to described voltage difference detection circuits, configuration
For predetermined process is carried out to the output signal of described voltage difference detection circuits；
Secondary signal processes circuit (180), is coupled to described residual current detection circuit and institute
State the first signal processing circuit, be configured to the output letter in response to described residual current detection circuit
Number and one of the predetermined error conditions of output signal of described first signal processing circuit and produce
Drive signal；
Exciting bank (190), is coupled to described secondary signal and processes circuit, be configured to response
Order about described switching device be in the described second place in described driving signal；
Wherein, described voltage difference detection circuits also include filtering and mu balanced circuit, described filtering and
Mu balanced circuit is used for filtering the voltage stabilizing signal through divider resistance dividing potential drop, so that described voltage difference
The output signal of testing circuit is safe for described first signal processing circuit.
2. the abnormal Aftercurrent protecting equipment of wiring according to claim 1, its feature exists
In, described first signal processing circuit comprises comparator circuit, for described voltage difference inspection
When the output signal of slowdown monitoring circuit is more than predetermined threshold, export predetermined signal.
3. the abnormal Aftercurrent protecting equipment of wiring according to claim 1, its feature exists
In described voltage difference detection circuits also includes at least one diode, and described diode is used for carrying
Take unidirectional half-wave voltage signal.
4. the abnormal Aftercurrent protecting equipment of wiring according to claim 1, its feature exists
In described secondary signal processes circuit and includes thyristor.
5. the abnormal Aftercurrent protecting equipment of wiring according to claim 4, its feature exists
In the output of described first signal processing circuit is directly coupled to the control of described thyristor
Pole.
6. the abnormal Aftercurrent protecting equipment of wiring according to claim 1, its feature exists
In the abnormal Aftercurrent protecting equipment of described wiring has the first power supply and second source is respectively
Described first signal processing circuit and described secondary signal process circuit and power.
7. the abnormal Aftercurrent protecting equipment of wiring according to claim 1, its feature exists
In described residual current detection circuit includes a current transformer, described phase conductor and zero
Line conductor is as the first primary of this current transformer, and the secondary of this current transformer is coupled to institute
State secondary signal and process circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210118175.3A CN103378592B (en) | 2012-04-20 | 2012-04-20 | The abnormal Aftercurrent protecting equipment of wiring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210118175.3A CN103378592B (en) | 2012-04-20 | 2012-04-20 | The abnormal Aftercurrent protecting equipment of wiring |
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| CN103378592A CN103378592A (en) | 2013-10-30 |
| CN103378592B true CN103378592B (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210118175.3A Active CN103378592B (en) | 2012-04-20 | 2012-04-20 | The abnormal Aftercurrent protecting equipment of wiring |
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| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN101651325A (en) * | 2008-08-15 | 2010-02-17 | 上海益而益电器制造有限公司 | Electric leakage detection protector |
| CN201781263U (en) * | 2010-05-10 | 2011-03-30 | 厦门振泰成科技有限公司 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
| CN102324717A (en) * | 2011-10-05 | 2012-01-18 | 刘睿刚 | Leakage protection device |
| CN202142736U (en) * | 2011-08-09 | 2012-02-08 | 刘睿刚 | Earth leakage protection plug |
| CN102354866A (en) * | 2011-08-09 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN202633938U (en) * | 2012-04-20 | 2012-12-26 | 苏州益而益电器制造有限公司 | Residual current protection device for wiring abnormity |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7889466B2 (en) * | 2008-05-02 | 2011-02-15 | Leviton Manufacturing Company, Inc. | Fault circuit interrupter with bi-directional sensing |
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2012
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201243203Y (en) * | 2008-07-25 | 2009-05-20 | 比亚迪股份有限公司 | Safety protection device for electric appliance |
| CN101651325A (en) * | 2008-08-15 | 2010-02-17 | 上海益而益电器制造有限公司 | Electric leakage detection protector |
| CN201781263U (en) * | 2010-05-10 | 2011-03-30 | 厦门振泰成科技有限公司 | Electric-shock protection wall overcurrent leakage protection circuit of wall switch |
| CN202142736U (en) * | 2011-08-09 | 2012-02-08 | 刘睿刚 | Earth leakage protection plug |
| CN102354866A (en) * | 2011-08-09 | 2012-02-15 | 刘睿刚 | Electricity leakage protection plug |
| CN102324717A (en) * | 2011-10-05 | 2012-01-18 | 刘睿刚 | Leakage protection device |
| CN202633938U (en) * | 2012-04-20 | 2012-12-26 | 苏州益而益电器制造有限公司 | Residual current protection device for wiring abnormity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103378592A (en) | 2013-10-30 |
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