CN104901089B - Change voltage-type leakage protecting plug - Google Patents
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- CN104901089B CN104901089B CN201510242011.5A CN201510242011A CN104901089B CN 104901089 B CN104901089 B CN 104901089B CN 201510242011 A CN201510242011 A CN 201510242011A CN 104901089 B CN104901089 B CN 104901089B
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Abstract
Voltage-type leakage protecting plug is changed the present invention relates to one kind, feature is to include electrical apparatus release JL, hookup, first and second fault current sensor circuit, electronic switch, false voltage control circuit and fault current control circuit；First zero sequence current mutual inductor of Fisrt fault current-sensing circuit is set on the zero line N of city's alternating current and live wire L, and the bipod that its two ends controls one group of input of circuit with fault current respectively is electrically connected；Second zero sequence current mutual inductor of the second fault current sensor circuit is set on the ground wire E of city's alternating current, the bipod of another input that its two ends controls circuit with fault current respectively is electrically connected, and the two ends of the two ends of the second change-over switch respectively with the second zero sequence current mutual inductor are electrically connected；The output end of electronic switch is electrically connected by electrical apparatus release JL with the live wire L of city's alternating current；The input of false voltage control circuit is electrically connected with the ground wire E of city's alternating current, and the output end of its output end and fault current control circuit is electrically connected with the input of electronic switch.It has the advantages that circuit structure is simple and more safe and reliable.
Description
Technical field
Voltage-type leakage protecting plug is changed the present invention relates to one kind.
Background technology
Existing conversion voltage-type leakage protecting plug is the failure voltage signal that ground wire is sensed with voltage transformer, so
The input that current transformer sends into failure voltage signal amplification treatment circuit is switched off and substituted with switching afterwards, it is amplified
Control electronic switching circuit is sent to after processing again, forces band three to act the electrical apparatus release of contact and powers off.The circuit structure is complicated,
It is also possible that signal phase is overlapped mutually or offset（Subtract each other）Caused false voltage or the exceeded phenomenon of fault current drift,
And it is easy to seal in other interference signals when failure voltage signal is by multiple circuits such as amplifications, causes poor anti jamming capability,
Misoperation is serious.
The content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art and provide a kind of circuit structure simply, i.e. property-line failure electricity
Press signal direct drive（Without courses of work such as enhanced processings）, the circuits such as voltage transformer and enhanced processing are increased without, both
The actual electrical leakage voltage of ground wire can be accurately sensed, other interference signals are may filter out, strong antijamming capability is safe and reliable
Change voltage-type leakage protecting plug.
In order to achieve the above object, the present invention is achieved in that it is a kind of conversion voltage-type leakage protecting plug, its
It is characterised by including band three to the electrical apparatus release JL of contact, electronic switch, Fisrt fault current-sensing circuit, the second fault current sense
Answer circuit, hookup, false voltage control circuit and fault current control circuit；Wherein
Three pairs of contacts of the electrical apparatus release JL are connected on ground wire E, zero line N and live wire L respectively, and electrical apparatus release JL also includes making three
The reset key resetted to contact；
The Fisrt fault current-sensing circuit includes the first zero sequence current mutual inductor, first zero sequence current mutual inductor
It is set on the zero line N of city's alternating current and live wire L, the two ends of the first zero sequence current mutual inductor control circuit with fault current respectively
One group of input bipod electrical connection；
One end of the hookup is electrically connected with the zero line input of city's alternating current, and the other end is with passing through the first zero sequence electricity
The fire wire output end electrical connection of city's alternating current of current transformer；
The second fault current sensor circuit includes the second zero sequence current mutual inductor and the second change-over switch, described second
Zero sequence current mutual inductor is set on the ground wire E of city's alternating current, the two ends of the second zero sequence current mutual inductor respectively with fault current
Control the bipod electrical connection of another input of circuit, the two ends of second change-over switch respectively with the second zero sequence current mutual inductance
The two ends electrical connection of device；
The output end of the electronic switch is electrically connected by electrical apparatus release JL with the live wire L of city's alternating current；
The input of the false voltage control circuit is electrically connected with the ground wire E of city's alternating current, false voltage control circuit
Output end and fault current control circuit output end electrically connected with the input of electronic switch.
In the technical program, the false voltage control circuit includes the first change-over switch, the 7th resistance, the 8th electricity
Appearance, the 3rd piezo-resistance, the 4th piezo-resistance and the 4th diode；Wherein described first change-over switch, the 7th resistance, the 4th pressure
Quick resistance and the 4th diode are sequentially connected in series rear one end and electrically connected with the ground wire E of city's alternating current, the other end and electronic switch it is defeated
Enter end electrical connection；One end the 7th resistance of electrical connection of 3rd piezo-resistance and concatenating a little for the first change-over switch, the 3rd pressure
The other end of quick resistance is electrically connected with zero line N；One end the 7th resistance of electrical connection of 8th electric capacity and concatenating for the 4th piezo-resistance
Point, the other end of the 8th electric capacity is electrically connected with zero line N.
In the technical program, the fault current control circuit includes enhanced processing integrated package, the 3rd to the 5th electric capacity
And the 3rd diode；The model RT54123B of wherein described enhanced processing integrated package, 1 pin and 2 pin of enhanced processing integrated package
The two ends with the first zero sequence current mutual inductor are electrically connected respectively, and 2 pin and 3 pin of enhanced processing integrated package are electric with the second zero sequence respectively
The two ends electrical connection of current transformer, 4 pin of enhanced processing integrated package are electrically connected with zero line N；The two ends difference of 3rd electric capacity
Electrically connected with 6 pin and 7 pin of enhanced processing integrated package, 4 pin of the two ends of the 4th electric capacity respectively with enhanced processing integrated package
And 5 pin electrical connection, the two ends of the 5th electric capacity are electrically connected with 2 pin and 4 pin of enhanced processing integrated package respectively；Described 3rd 2
The positive pole of pole pipe is that output end is electrically connected with 7 pin of enhanced processing integrated package, the negative pole of the 3rd diode and electronic switch it is defeated
Enter end electrical connection.
In the technical program, the electronic switch includes commutation diode, controllable silicon, the first electric capacity, the second electric capacity, limit
Leakage resistance, the second piezo-resistance and voltage-regulator diode；The positive pole of wherein described commutation diode is exchanged by electrical apparatus release JL with city
The live wire L electrical connections of electricity, one end, controllable silicon positive pole and the current-limiting resistance of the negative pole of commutation diode respectively with the second piezo-resistance
One end electrical connection, the other end of the current-limiting resistance electrically connects with one end of the first electric capacity, one end of second electric capacity and
The negative pole of voltage-regulator diode is electrically connected with the control pole of controllable silicon, the control pole of controllable silicon also with the negative pole of the 3rd diode and
The negative pole electrical connection of 4th diode；The negative pole of controllable silicon, the positive pole of voltage-regulator diode, the other end of the first electric capacity and the second electricity
The other end of appearance is electrically connected with zero line N.
In the technical program, also including the 4th resistance and the 6th electric capacity, after the 4th resistance is in parallel with the 6th electric capacity
Be electrically connected to both ends of on the two ends of the first zero sequence current mutual inductor.
In the technical program, also including the 5th resistance and the 7th electric capacity, after the 5th resistance is in parallel with the 7th electric capacity
Be electrically connected to both ends of in two output ends of the second zero sequence current mutual inductor.
In the technical program, the hookup includes test switch and test resistance, the test switch and test
One end is electrically connected with the live wire L output ends through major loop transformer after resistant series, and the other end is electrically connected with zero line N inputs
Connect.
Present invention advantage compared with prior art is：Circuit structure is simple, is increased without at voltage transformer and amplification
The circuits such as reason, and the control pole for circuit the is applied directly to controllable silicon such as ground wire voltage signal is not amplified, accurately can sense ground
Line electrical leakage voltage and induced voltage can be filtered out, can be prevented effectively from again caused by amplifying circuit signal is mutually mixed interference
Misoperation etc. is bad；The ground wire false voltage process circuit and fault current process circuit of the other circuit（Including major loop and
Earthing pole）It is each independent, do not involve mutually, can be prevented effectively from because signal phase is overlapped mutually or is offset（Subtract each other）Caused failure
Voltage or the exceeded phenomenon of fault current drift, it is more safe and reliable.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
The embodiment to the present invention is described further below in conjunction with the accompanying drawings.Herein it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.In addition, disclosed below
As long as each of the invention embodiment in involved technical characteristic do not constitute conflict each other and can just be combined with each other.
In the description of the invention, term " first " and " the 7th " be only used for describe purpose, and it is not intended that indicate or
Imply relative importance.
As shown in figure 1, it is a kind of conversion voltage-type leakage protecting plug, including band three to the electrical apparatus release JL 1 of contact,
Hookup 2, Fisrt fault current-sensing circuit 3, the second fault current sensor circuit 4, electronic switch 5, false voltage control
Circuit 6 and fault current control circuit 7；Wherein
Three pairs of contacts of the electrical apparatus release JL 1 are connected on ground wire E, zero line N and live wire L respectively, and electrical apparatus release JL 1 also includes
The reset key RESET for resetting three pairs of contacts；
The Fisrt fault current-sensing circuit 3 includes the first zero sequence current mutual inductor ZCT1, first zero-sequence current
Transformer ZCT1 is set on the zero line N of city's alternating current and live wire L, the first zero sequence current mutual inductor ZCT1 two ends respectively with therefore
Hinder the bipod electrical connection of one group of input of current control circuit 7；
One end of the hookup 2 is electrically connected with the zero line of city's alternating current, and the other end is with passing through the first zero-sequence current mutual
The live wire electrical connection of sensor ZCT1 city's alternating current；
The second fault current sensor circuit 4 includes the second zero sequence current mutual inductor ZCT2 and the second change-over switch Kv2,
The second zero sequence current mutual inductor ZCT2 is set on the ground wire E of city's alternating current, and the two of the second zero sequence current mutual inductor ZCT2
The bipod that end controls another group of input of circuit 7 with fault current respectively is electrically connected, the two ends of the second change-over switch Kv2
The two ends with the second zero sequence current mutual inductor ZCT2 are electrically connected respectively；
The output end of the electronic switch 5 is 1 to be electrically connected with the live wire L of city's alternating current by electrical apparatus release JL；
The input of the false voltage control circuit 6 is electrically connected with the ground wire E of city's alternating current, false voltage control circuit
Input of the output end of 6 output end and fault current control circuit 7 with electronic switch 5 is electrically connected.
The hookup 2 includes test switch TEST and test resistance R2, the test switch TEST and test resistance
One end is electrically connected with the live wire L output ends through major loop transformer after R2 series connection, and the other end is electrically connected with zero line N inputs.
Process of the test:Press test and switch TEST, the live wire L through the first zero sequence current mutual inductor ZCT1 is connect by test resistance R2
Logical input zero-power line N, produces an experiment（Simulate leak current fault）Current signal, and cut by above-mentioned abnormal dropout process
Power-off source；The reset key RESET and test switch TEST of electrical apparatus release coordinate, and can also be used as power switch.
In the present embodiment, the false voltage control circuit 6 includes the first change-over switch Kv1, the 7th resistance R7, the 8th
Electric capacity C8, the 3rd piezo-resistance Ru3, the 4th piezo-resistance Ru4 and the 4th diode D4, the first change-over switch Kv1 and
Three piezo-resistance Ru3 one end is in parallel, and is gone here and there successively with the 7th resistance R7, the 4th piezo-resistance Ru4 and the 4th diode D4
One end is electrically connected with the ground wire E of city's alternating current after connection, and the other end is electrically connected with the input of electronic switch 5, the 3rd piezo-resistance
The Ru3 other end is electrically connected with zero line N；8th electric capacity C8 one end electrical connection the 7th resistance R7's and the 4th piezo-resistance Ru4
Point is concatenated, the 8th electric capacity C8 other end is electrically connected with zero line N.
In the present embodiment, the fault current control circuit 7 includes enhanced processing ic chip, the 3rd to the 5th electric capacity
C3-C5 and the 3rd diode D3；The model RT54123B of wherein described enhanced processing ic chip, enhanced processing ic chip
Two ends respectively with the first zero sequence current mutual inductor ZCT1 of 1 pin and 2 pin electrically connect, 2 pin and 3 pin of enhanced processing ic chip
The two ends with the second zero sequence current mutual inductor ZCT2 are electrically connected respectively, and 4 pin of enhanced processing ic chip are electrically connected with zero line N；
The two ends of the 3rd electric capacity C3 are electrically connected with 6 pin and 7 pin of enhanced processing ic chip respectively, and the two of the 4th electric capacity C4
End is electrically connected with 4 pin and 5 pin of enhanced processing ic chip respectively, the two ends of the 5th electric capacity C5 respectively with enhanced processing collection
Blocking IC 2 pin and the electrical connection of 4 pin；The anode of the 3rd diode D3 and 7 pin of enhanced processing ic chip are output end
Electrical connection, the 3rd diode D3 negative pole is electrically connected with the input of electronic switch 5.
In the present embodiment, the electronic switch 5 includes commutation diode D1, controllable silicon Q, the first electric capacity C1, the second electricity
Hold C2, current-limiting resistance R3, the second piezo-resistance Ru2 and voltage-regulator diode DW；Wherein described commutation diode D1 positive pole passes through
Electrical apparatus release JL is 1 to be electrically connected with the live wire L of city's alternating current, and commutation diode D1 negative pole is respectively with the second piezo-resistance Ru2's
One end electrical connection of one end, controllable silicon Q positive poles and current-limiting resistance R3, the other end of the current-limiting resistance R3 and the first electric capacity C1's
One end is electrically connected, and the control pole of one end of the second electric capacity C2 and voltage-regulator diode DW negative pole with controllable silicon Q is electrically connected,
Controllable silicon Q control pole is also electrically connected with the 3rd diode D3 negative pole and the 4th diode D4 negative pole；Controllable silicon Q's is negative
Pole, voltage-regulator diode DW positive pole, the first electric capacity C1 other end and the second electric capacity C2 other end are electrically connected with zero line N.
In the present embodiment, also including the 4th resistance R4 and the 6th electric capacity C6, the 4th resistance R4 and the 6th electric capacity C6
Being electrically connected to both ends of on the first zero sequence current mutual inductor ZCT1 two ends after parallel connection.
In the present embodiment, also including the 5th resistance R5 and the 7th electric capacity C7, the 5th resistance R5 and the 7th electric capacity C7
Being electrically connected to both ends of in the second zero sequence current mutual inductor ZCT2 two output ends after parallel connection.
In the present embodiment, also including the first piezo-resistance Ru1；One end of the first piezo-resistance Ru1 is exchanged with city
The zero line electrical connection of electricity, the other end electrically connects with the live wire of city's alternating current, the first piezo-resistance Ru1 for prevent electric appliance load and
This product is by surge voltage and lightning impulse.
Leakage current failure protection process：First change-over switch Kv1 and the second change-over switch Kv2 are off, this
If when major loop or ground wire there is leakage current failure, the first zero sequence current mutual inductor ZCT1 for being set on power line L, N or
The second zero sequence current mutual inductor ZCT2 being set on ground wire E will sense major loop or ground wire fault-current signal immediately,
And the input 1,2 or 2 of enhanced processing ic chip, 3 pin are sent it to, it is output to controllable silicon Q by 7 pin after amplified processing
Control pole, triggering controllable silicon Q turns on and by the short circuit of commutation diode D1 both positive and negative polarity, trip coil JL is produced immediately immediately
Raw powerful electric current (750mA or so), linkage tripping mechanism tripping operation, power firestreak, zero line and ground wire is cut off simultaneously, effectively
Protect the safety of the person.
Electrical leakage voltage failure protection process：Change-over switch is pressed, at the first change-over switch Kv1 and the second change-over switch Kv2
In closure conducting state, the second zero sequence current mutual inductor ZCT2 has been cut off and has been input at amplification by the second change-over switch Kv2 short circuits
Ic chip 2, the ground wire fault-current signal of 3 pin are managed, so being now grounded（E）Line is somebody's turn to do no matter there is great fault current
Mechanism（Circuit）All without action；Now（Change-over switch Kv1, Kv2 are in closure state) if occurring ground strip electric fault, failure
Voltage signal is sent to the 7th resistance R7 by the first change-over switch Kv1, through the 7th resistance R7 current limlitings（Or pressure limiting）After be sent to
4th piezo-resistance Ru4 one end, when false voltage reaches certain value（36~50V）When, the 4th instant snowslides of piezo-resistance Ru4
Conducting, fourth diode D4 rectification after-applied control pole to controllable silicon Q of this failure voltage signal through excessively its concatenation, triggering
Controllable silicon Q is turned at once, forces connection tripping coil JL commutation diode D1 directly and negative pole（N）Conducting, tripping coil JL
By very big electric current and high-intensity magnetic field is produced immediately, pull electrical apparatus release iron core to link simultaneously tripping mechanism tripping operation power-off；3rd pressure
Quick resistance Ru3 can effectively prevent the misoperation caused by the surge voltage that ground wire senses；8th electric capacity C8 can further absorb（It is other
Road）High-frequency interferencing signal, makes work relatively reliable；Voltage-regulator diode DW is then used to protect controllable silicon to damage from high-voltage impact
Wound.
Embodiments of the present invention are explained in detail above in association with accompanying drawing, but the present invention is not limited to described reality
Apply mode.For the ordinary skill in the art, in the case where not departing from the principle and objective of the present invention to these
Embodiment carries out a variety of changes, modification, replacement and deformation and still fallen within the scope of the present invention.
Claims (6)
1. one kind conversion voltage-type leakage protecting plug, it is characterised in that including electrical apparatus release JL of the band three to contact（1）, experiment electricity
Road（2）, Fisrt fault current-sensing circuit（3）, the second fault current sensor circuit（4）, electronic switch（5）, false voltage control
Circuit processed（6）And fault current control circuit（7）；Wherein
The electrical apparatus release JL（1）Three pairs of contacts be connected on respectively on ground wire E, zero line N and live wire L, electrical apparatus release JL（1）Also include making
The reset key that three pairs of contacts reset（RESET）；
The Fisrt fault current-sensing circuit（3）Including the first zero sequence current mutual inductor（ZCT1）, first zero-sequence current
Transformer（ZCT1）It is set on the zero line N of city's alternating current and live wire L, the first zero sequence current mutual inductor（ZCT1）Two ends difference
Circuit is controlled with fault current（7）One group of input bipod electrical connection；
The hookup（2）One end electrically connected with the zero line input of city's alternating current, the other end with through the first zero sequence electricity
Current transformer（ZCT1）City's alternating current fire wire output end electrical connection；
The second fault current sensor circuit（4）Including the second zero sequence current mutual inductor（ZCT2）And second change-over switch
（Kv2）, second zero sequence current mutual inductor（ZCT2）It is set on the ground wire E of city's alternating current, the second zero sequence current mutual inductor
（ZCT2）Two ends respectively with fault current control circuit（7）Another input bipod electrical connection, it is described second conversion open
Close（Kv2）Two ends respectively with the second zero sequence current mutual inductor（ZCT2）Two ends electrical connection；
The electronic switch（5）Output end pass through electrical apparatus release JL（1）Electrically connected with the live wire L of city's alternating current；
The false voltage controls circuit（6）Input electrically connected with the ground wire E of city's alternating current, false voltage control circuit
（6）Output end and fault current control circuit（7）Output end and electronic switch（5）Input electrical connection；
The false voltage controls circuit（6）Including the first change-over switch（Kv1）, the 7th resistance（R7）, the 8th electric capacity（C8）,
Three piezo-resistances（Ru3）, the 4th piezo-resistance（Ru4）And the 4th diode（D4）；Wherein described first change-over switch（Kv1）、
7th resistance（R7）, the 4th piezo-resistance（Ru4）And the 4th diode（D4）It is sequentially connected in series the ground wire E of rear one end and city's alternating current
Electrical connection, the other end and electronic switch（5）Input electrical connection；3rd piezo-resistance（Ru3）One end electrical connection the
Seven resistance（R7）With the first change-over switch（Kv1）Concatenation point, the 3rd piezo-resistance（Ru3）The other end electrically connected with zero line N；
8th electric capacity（C8）One end electrically connect the 7th resistance（R7）With the 4th piezo-resistance（Ru4）Concatenation point, the 8th electric capacity（C8）
The other end electrically connected with zero line N.
2. conversion voltage-type leakage protecting plug according to claim 1, it is characterised in that the fault current control electricity
Road（7）Including enhanced processing integrated package（IC）, the 3rd electric capacity（C3）, the 4th electric capacity（C4）, the 5th electric capacity（C5）And the three or two pole
Pipe（D3）；Wherein described enhanced processing integrated package（IC）Model RT54123B, enhanced processing integrated package（IC）1 pin and 2
Pin respectively with the first zero sequence current mutual inductor（ZCT1）Two ends electrical connection, enhanced processing integrated package（IC）2 pin and 3 pin difference
With the second zero sequence current mutual inductor（ZCT2）Two ends electrical connection, enhanced processing integrated package（IC）4 pin electrically connected with zero line N；
3rd electric capacity（C3）Two ends respectively with enhanced processing integrated package（IC）6 pin and 7 pin electrical connection, the 4th electric capacity
（C4）Two ends respectively with enhanced processing integrated package（IC）4 pin and 5 pin electrical connection, the 5th electric capacity（C5）Two ends difference
With enhanced processing integrated package（IC）2 pin and 4 pin electrical connection；3rd diode（D3）Positive pole and enhanced processing integrated package
（IC）7 pin be output end electrical connection, the 3rd diode（D3）Negative pole and electronic switch（5）Input electrical connection.
3. conversion voltage-type leakage protecting plug according to claim 1 or 2, it is characterised in that the electronic switch（5）
Including commutation diode（D1）, controllable silicon（Q）, the first electric capacity（C1）, the second electric capacity（C2）, current-limiting resistance（R3）, it is second pressure-sensitive
Resistance（Ru2）And voltage-regulator diode（DW）；Wherein described commutation diode（D1）Positive pole pass through electrical apparatus release JL（1）Exchanged with city
The live wire L electrical connections of electricity, commutation diode（D1）Negative pole respectively with the second piezo-resistance（Ru2）One end, controllable silicon（Q）Just
Pole and current-limiting resistance（R3）One end electrical connection, the current-limiting resistance（R3）The other end and the first electric capacity（C1）One end be electrically connected
Connect, second electric capacity（C2）One end and voltage-regulator diode（DW）Negative pole and controllable silicon（Q）Control pole electrical connection, can
Control silicon（Q）Control pole also with the 3rd diode（D3）Negative pole and the 4th diode（D4）Negative pole electrical connection；Controllable silicon（Q）
Negative pole, voltage-regulator diode（DW）Positive pole, the first electric capacity（C1）The other end and the second electric capacity（C2）The other end with zero
Line N is electrically connected.
4. conversion voltage-type leakage protecting plug according to claim 1, it is characterised in that also including the 4th resistance（R4）
And the 6th electric capacity（C6）, the 4th resistance（R4）With the 6th electric capacity（C6）Being electrically connected to both ends of in the first zero sequence after parallel connection
Current transformer（ZCT1）Two ends on.
5. conversion voltage-type leakage protecting plug according to claim 1, it is characterised in that also including the 5th resistance（R5）
And the 7th electric capacity（C7）, the 5th resistance（R5）With the 7th electric capacity（C7）Being electrically connected to both ends of in the second zero sequence after parallel connection
Current transformer（ZCT2）Two output ends on.
6. conversion voltage-type leakage protecting plug according to claim 1, it is characterised in that the hookup（2）Including
Test switch（TEST）And test resistance（R2）, the test switch（TEST）With test resistance（R2）One end is with passing through after series connection
The live wire L output ends electrical connection of major loop transformer, the other end is electrically connected with zero line N inputs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242011.5A CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242011.5A CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
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| Publication Number | Publication Date |
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| CN104901089A CN104901089A (en) | 2015-09-09 |
| CN104901089B true CN104901089B (en) | 2017-07-14 |
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| CN201510242011.5A Active CN104901089B (en) | 2015-05-13 | 2015-05-13 | Change voltage-type leakage protecting plug |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901090B (en) * | 2015-06-01 | 2017-03-08 | 佛山市顺德区信辉达电子有限公司 | A kind of conversion voltage-type leakage protecting plug |
| CN106169733A (en) * | 2016-06-07 | 2016-11-30 | 佛山市顺德区信辉达电子有限公司 | Conversion voltage-type leakage protecting plug |
| CN105958440A (en) * | 2016-06-29 | 2016-09-21 | 常熟市立得电器有限公司 | Tripolar disconnection leakage protection plug |
| CN108539538A (en) * | 2018-04-07 | 2018-09-14 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202159853U (en) * | 2011-03-25 | 2012-03-07 | 深圳市喻深鸿电气科技有限公司 | Intelligent socket |
| CN202940393U (en) * | 2012-11-16 | 2013-05-15 | 珠海格力电器股份有限公司 | Electric leakage protection plug |
| CN104505667A (en) * | 2014-12-26 | 2015-04-08 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type leakage protection plug |
| CN204597142U (en) * | 2015-05-13 | 2015-08-26 | 佛山市顺德区信辉达电子有限公司 | Changing voltage type leakage protecting plug |
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2015
- 2015-05-13 CN CN201510242011.5A patent/CN104901089B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202159853U (en) * | 2011-03-25 | 2012-03-07 | 深圳市喻深鸿电气科技有限公司 | Intelligent socket |
| CN202940393U (en) * | 2012-11-16 | 2013-05-15 | 珠海格力电器股份有限公司 | Electric leakage protection plug |
| CN104505667A (en) * | 2014-12-26 | 2015-04-08 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type leakage protection plug |
| CN204597142U (en) * | 2015-05-13 | 2015-08-26 | 佛山市顺德区信辉达电子有限公司 | Changing voltage type leakage protecting plug |
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| CN104901089A (en) | 2015-09-09 |
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