CN103595019B - For the method and apparatus of the automatically jumping of the neutral pole of switch - Google Patents
For the method and apparatus of the automatically jumping of the neutral pole of switch Download PDFInfo
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- CN103595019B CN103595019B CN201210294772.1A CN201210294772A CN103595019B CN 103595019 B CN103595019 B CN 103595019B CN 201210294772 A CN201210294772 A CN 201210294772A CN 103595019 B CN103595019 B CN 103595019B
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Abstract
There is provided a kind of method and apparatus of the automatically jumping of the neutral pole for switch, contact can be avoided from corroding the problem with melting welding.For the method for the automatically jumping of the neutral pole of switch, including：The voltage of the leading-out terminal of the phase pole of detection switch；And the voltage based on the leading-out terminal triggers actuator, controlling the trip status of the neutral pole of the switch.Because triggering actuator by the voltage of the leading-out terminal based on phase pole and the dropout of neutral pole being promoted by actuator, so the dropout of neutral pole is entirely a mechanical process, so as to avoid corrosion and the welding problems of contact, the service life of element is extended, saved cost.
Description
Technical field
The present invention relates to a kind of method and apparatus of the automatically jumping of the neutral pole for switch, more particularly to a kind of and dress
With printed circuit board (PCB)（Printed Circuit Board Assembly, PCBA）The switch for using cooperatively.
Background technology
At present, in switch at home, such as RCCB（RCBO）Or miniature circuit breaker（MCB）In, neutral pole N does not have
There is arc extinguishing ability（The position is accounted for by PCBA）, usually using the high breaking capacity of phase pole P, the contact of neutral pole N is thickeied, and
And neutral pole N uses are-tight contact material, such as AgWC instead so that neutral pole contact in whole breaking course can be shouldered firmly
Go.But, so not only cost is very high, and can not be fully solved the problem that contact acutely corrodes in breaking course, easily
There are the serious problems such as contact melting welding.Especially when high current flows through circuit, the galvano-cautery of contact can be more serious, so that touching
First melt is welded and can not worked on afterwards.
The content of the invention
A kind of method and apparatus of the automatically jumping of the neutral pole for switch is the embodiment of the invention provides, can be avoided
Contact corrodes the problem with melting welding.
According to an aspect of the invention, there is provided a kind of method of the automatically jumping of neutral pole for switch, including：
The voltage of the leading-out terminal of the phase pole of detection switch；And voltage based on the leading-out terminal triggers actuator, to control described opening
The trip status of the neutral pole of pass.
According to another aspect of the present invention, there is provided a kind of equipment of the automatically jumping of neutral pole for switch, bag
Include：Detector, for the voltage of the leading-out terminal of the phase pole of detection switch；Controller, touches for the voltage based on the leading-out terminal
Hair actuator；And actuator, the trip status of the neutral pole for controlling the switch under the control of the controller.
Therefore, according to embodiments of the present invention, because triggered by the voltage of the leading-out terminal based on phase pole actuator and by
Actuator promotes the dropout of neutral pole, so the dropout of neutral pole is entirely a mechanical process, so as to avoid contact
Corrosion and welding problems, extend the service life of element, have saved cost.
Brief description of the drawings
The example embodiment of present inventive concept will be more clearly understood from the detailed description for carrying out below in conjunction with the accompanying drawings,
In accompanying drawing：
Fig. 1 is the method for the automatically jumping for schematically showing the neutral pole for being used for switching according to an embodiment of the invention
Flow chart；
Fig. 2 is the exemplary of the equipment of the automatically jumping for showing neutral pole according to an embodiment of the invention for switch
The block diagram of structure；
Fig. 3 is the first realization of the equipment of the automatically jumping of the neutral pole for switch for showing according to embodiments of the present invention
The exemplary circuit diagram of mode；And
Fig. 4 is the second realization of the equipment of the automatically jumping of the neutral pole for switch for showing according to embodiments of the present invention
The exemplary circuit diagram of mode.
Specific embodiment
The present invention described below refer to the attached drawing to help comprehensive understanding to be limited by appended claims and their equivalents is provided
One exemplary embodiment.It includes various details to help understanding, but it should they are thought into only exemplary.Therefore,
It will be appreciated by those of ordinary skill in the art that, various changes and modifications can be made to the embodiments described herein, without
Away from scope and spirit of the present invention.Equally, for clarity and conciseness, the description to known function and structure is eliminated.
It should be understood that when claim an element another element " on " when, it can be on other elements
Or there may be insertion element therebetween.Conversely, when claim an element " direct " another element " on " when, in the absence of any
Insertion element.As used herein, term "and/or" lists any of item and whole combinations including one or more correlations.
It should be appreciated that being referred to as " connection " or during " coupled " to another element when an element, it can be directly connected to or coupling
It is connected to another element or there may be intermediary element.Conversely, being arrived when an element is referred to as " being directly connected to " or " directly coupling "
During another element, in the absence of intermediary element.Other words for describing the relation between element should be solved in a similar manner
Release（For example, " between " relative to " directly between ", " adjacent " relative to " direct neighbor " etc.）.
It is understood that, although term first, second, third, etc. can be used herein and describe various elements, component, area
Domain, layer and/or part, but these elements, component, region, layer and/or part do not should be these terms and are limited.These
Term is used only for an element, component, region, layer and/or part and another element, component, region, layer and/or portion
Split-phase is distinguished.Thus, the first element discussed below, component, region, layer and/or part can be regarded as the second element, group
Part, region, layer and/or part, without departing from the teachings of the present invention.
The term being used herein is not intended to limit the present invention just for the sake of describing the purpose of specific embodiment.
As used herein, singulative " ", " one " and " being somebody's turn to do " be intended to also include plural form, unless clearly indicated by the context
It is really not so.It should also be appreciated that when using in this manual, term " including " and/or " including ... " or "comprising"
And/or " including ... " specifies the presence of illustrated feature, region, integer, step, operation, element and/or component, but
Be do not preclude the presence or addition of one or more other features, region, integer, step, operation, element and/or components and/or its
Group.
Additionally, the relative terms at such as " bottom " or " bottom " and " top " or " top " may be used herein to describe such as
The relation of an element shown in figure to another element.It should be understood that relative terms are intended to cover except being described in figure
Orientation outside equipment different azimuth.If for example, the equipment in one figure of upset, is described as be in other elements
The element of " bottom " side will turn to " top " side of other elements.Therefore, exemplary term " bottom " can depend on accompanying drawing
Specific orientation and cover both orientation on " bottom " and " top ".Similarly, if overturning the equipment in a figure, it is described
Be other elements " under " or " beneath " element will turn to other elements " on ".Therefore, exemplary term " under " or
" beneath " can cover both orientation of " on " and " under ".
Unless otherwise defined, all terms otherwise used herein above have and one of the art common skill
The identical implication that art personnel are generally understood that.It should also be appreciated that those terms such as defined in general dictionary should be by
Be construed to have the implication consistent with its implication of the context of correlation technique and the disclosure, without should with idealize or excessively
The meaning of formalization is explained to it, unless be clearly so defined here.
Describe the embodiment of the present invention in detail below with reference to the accompanying drawings.
Fig. 1 is the method for the automatically jumping for schematically showing the neutral pole for being used for switching according to an embodiment of the invention
100 flow chart.
As shown in fig. 1, in the 110 of method 100, the voltage of the leading-out terminal of the phase pole of detection switch.In 120, base
Actuator is triggered in the voltage of the leading-out terminal, to control the trip status of the neutral pole of the switch.
Therefore, according to embodiments of the present invention, because triggered by the voltage of the leading-out terminal based on phase pole actuator and by
Actuator promotes the dropout of neutral pole, so the dropout of neutral pole is entirely a mechanical process, so as to avoid contact
Corrosion and welding problems, extend the service life of element, have saved cost.Additionally, embodiment of the present invention centering pole point
Cutting capacity is not required, such that it is able to use the neutral pole without breaking capacity or with faint breaking capacity.
Fig. 2 is showing for the equipment 200 of the automatically jumping for showing the neutral pole for being used for switch according to an embodiment of the invention
The block diagram of plasticity structure.
As shown in Figure 2, equipment 200 includes detector 201, controller 202 and actuator 203.
Specifically, detector 201 is used for the voltage of the leading-out terminal of the phase pole of detection switch, and controller 202 is used to be based on
The voltage of the leading-out terminal triggers actuator, and actuator 203 is used to control the switch under the control of the controller
Neutral pole trip status.
Therefore, according to embodiments of the present invention, because triggered by the voltage of the leading-out terminal based on phase pole actuator and by
Actuator promotes the dropout of neutral pole, so the dropout of neutral pole is entirely a mechanical process, so as to avoid contact
Corrosion and welding problems, extend the service life of element, have saved cost.Additionally, embodiment of the present invention centering pole point
Cutting capacity is not required, such that it is able to use the neutral pole without breaking capacity or with faint breaking capacity.
Here, when the voltage that detector 201 detects leading-out terminal is equal to or higher than a predetermined voltage threshold, controller
202 do not trigger actuator 203, so that the neutral pole of switch is not threaded off；And when the voltage that detector 201 detects leading-out terminal is low
When the predetermined voltage threshold, the triggering actuator 203 of the controller 202, so that actuator 203 promotes the neutrality of the switch
Thread off pole.
It should be noted that those skilled in the art can as needed or experiment determines the predetermined voltage threshold, with
So that the predetermined voltage threshold is suitable for being actually needed and can allowing certain voltage pulsation.
Fig. 3 is the first realization of the equipment of the automatically jumping of the neutral pole for switch for showing according to embodiments of the present invention
The exemplary circuit diagram of mode 300.
In figure 3, actuator is shown as magnetictrip, but, embodiment of the present invention not limited to this, art technology
Personnel can select other suitable devices according to design requirement and working environment, as long as it can carry out trip action i.e.
Can.Additionally, controller is shown as into PCBA.
As shown in Figure 3, in the first implementation 300, switch 302 includes an a neutral pole N and phase pole P, and
And switch 302 for example can be such as RCCB（RCBO）Or miniature circuit breaker（MCB）Breaker.Although real first
Switch 302 is illustrated as 1P+N structures in existing mode 300, but the invention is not restricted to this, those skilled in the art can be with bright
The white switch 302 can also be heterogeneous structure, such as 2P+N, 3P+N, 4P+N etc., as will be described.
Here, the first implementation 300 will switch 302 be shown as upper end power taking, i.e. neutral pole N and phase pole P upper ends be
End of incoming cables and its lower end are leading-out terminal, but those skilled in the art are it will be appreciated that except end of incoming cables and leading-out terminal are conversely outer, use
It is similar with upper end power taking in the connected mode of lower end power taking, repeat no more here.
Specifically, in the first implementation 300, the zero line of PCBA 303 passes through a mechanical organ K（For example switch
Device）It is connected to the leading-out terminal of the neutral pole N of switch 302.Here, mechanical organ K is in order that the zero line of PCBA 303 suspends
In the neutral pole N of switch, i.e., when neutral pole N is not closed, PCBA 303 is not connected with the neutral pole N of switch.This suspension sets
Meter is intended merely to ensure the safety of installation personnel, and not necessarily.
The live wire of PCBA 303 is connected to the end of incoming cables of the phase pole of switch 302, the phase pole P of the detection switch 302 of detector 304
Leading-out terminal voltage, and by detection signal send into PCBA 303 in.Magnetictrip 301 can be with the live wire string of PCBA 303
Connection connection, and coupled with the neutral pole N of switch 302.
When the phase pole P for switching 302 is closed, the voltage of its leading-out terminal is equal to or higher than a predetermined voltage threshold, for example should
The voltage of leading-out terminal can be 220V, and detector 304 detects the high voltage, so that PCBA 303 does not trigger magnetictrip
301 and magnetictrip 301 does not take action, so the neutral pole N of switch 302 does not thread off.
As the phase pole P for switching 302 because when disjunction, de- magnetic, Re Tuo or other reasonses are threaded off, the voltage of its leading-out terminal is less than
Determine voltage threshold, the voltage of such as leading-out terminal can be 0V, and detector 304 detects the low-voltage, so that PCBA 303 is touched
The action of generating magnetic release 301, is threaded off with the neutral pole N of pull switch 302.The process may cause the dropout of slave phase pole P
To a shorter time delay between the dropout of neutral pole N, between for example, 0.5s to 2s, and can be set by circuit
Count to control the time delay.
Now, in circuit, because phase pole P does not have do not have electric current in electric current, thus circuit yet, so neutral pole N's is de-
Button is entirely a mechanical process.Therefore, it is to avoid the corrosion of contact and welding problems, the service life of element is extended.This
Outward, this process does not need the neutral pole N to have a breaking capacity, thus can in circuit using without breaking capacity or having
The neutral pole of faint breaking capacity, extends the use scope of circuit.
Although detector 304 to be shown as the part for PCBA 303 separate in figure 3, those skilled in the art can
To understand, it is also possible to using the existing device inside PCBA 303 come the voltage of the leading-out terminal of the phase pole P of detection switch 302, only
Will the device can sense the voltage of the leading-out terminal and notify PCBA 303.
Fig. 4 is the second realization of the equipment of the automatically jumping of the neutral pole for switch for showing according to embodiments of the present invention
The exemplary circuit diagram of mode 400, wherein, switch 402 is 3P+N structures, and is upper end power taking.
When it is heterogeneous structure to switch 402, can select in the plurality of phase pole P with neutral pole N close to a phase pole
Leading-out terminal detects its voltage.
Additionally, in the second implementation 400, in addition to a voltage for the leading-out terminal of phase pole P, detector 404 is also
Detection external signal, and PCBA 403 as controller triggered based on the external signal with the combination of the voltage of leading-out terminal
The action of magnetictrip 401.It should be noted that the voltage of leading-out terminal and external signal are different signals, and the outside is believed
Number will not be input to phase pole P.
For example, the external signal can be the instruction or the instruction of internal system for the user for indicating neutral pole N to thread off.
Based on the instruction, even if the voltage of the leading-out terminal of phase pole P is equal to or higher than predetermined voltage threshold, PCBA403 also triggers electromagnetism and takes off
Button device 401 so that the dropout of the neutral pole N of the pull switch of magnetictrip 401.
According to embodiments of the present invention, the dropout part of neutral pole N can be one side dropout part, for example one side gear crescent moon type groove or
Release lever is unidirectionally shared, so that proper phase pole P does not drive neutral pole N to thread off together when threading off, but can when neutral pole N threads off
To drive phase pole P to thread off together.It should be noted that the one side dropout part of neutral pole N is not limited to one side gear crescent moon type groove and list
To shared release lever, those skilled in the art can as needed using other mechanisms, as long as it can realize being threaded off as phase pole P
When do not drive neutral pole N to thread off together and phase pole P can be driven to thread off together when neutral pole N threads off.
Additionally, external signal can be one or more in over-pressed signal, under-voltage signal and shunt opening signal, or can be with
It is other any signals that can be characterized as being voltage, including temperature, humidity etc..
Here it is possible to using with door（AND）It is used as detector 404.But, the invention is not restricted to this, art technology
Personnel are it will be appreciated that can also be according to the characteristic of each external signal and design requirement using other logic circuits, element
Even combinational circuit.
Therefore, embodiments in accordance with the present invention, can be combined with the on/off that other external signals carry out controlling switch, and by
The dropout part of neutral pole N drives the dropout of phase pole P, and this greatly expands the range of application of product, and improves the peace of product
Quan Xing.
For example, when the voltage of the leading-out terminal of phase pole P is equal to or higher than predetermined voltage threshold, if detector 404 is detected
To over-pressed signal, then according to the result of logic and operation, controller still will trigger magnetictrip 401 with pull switch 402
Neutral pole N thread off, and neutral pole N dropout part drive phase pole P thread off together.So, product can be made from over-pressed, deficient
The influence such as pressure.
It should be noted that for clarity and conciseness, be illustrate only in Fig. 2 to Fig. 4 related to the embodiment of the present invention
Part, but it will be appreciated by those skilled in the art that, equipment or device shown in Fig. 2 to Fig. 4 can include that other are necessary
Unit.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Unit, can be realized with electronic hardware, computer software or the combination of the two, can in order to clearly demonstrate hardware and software
Interchangeability, generally describes the composition and step of each example according to function in the above description.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Described function, but this realization can be realized it is not considered that exceeding using distinct methods to each specific application
The scope of the present invention.
In several embodiments provided herein, it should be understood that disclosed system and device, can be by it
Its mode is realized.For example, device embodiment described above is only schematical, for example, the division of the unit, only
Only a kind of division of logic function, can there is other dividing mode when actually realizing, such as multiple units or component can be tied
Another system is closed or is desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or discussed
Coupling each other or direct-coupling or communication connection can be the INDIRECT COUPLINGs or logical of device or unit by some interfaces
Letter connection, can be electrical, mechanical or other forms.
The unit that is illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part for showing can be or may not be physical location, both may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be according to the actual needs selected to realize the mesh of this embodiment scheme
's.
In addition, during each functional unit in each embodiment of the invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to which two or more units are integrated in a unit.Above-mentioned integrated list
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated unit is to realize in the form of SFU software functional unit and as independent production marketing or use
When, can store in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part for being contributed to prior art in other words or all or part of the technical scheme can be in the form of software products
Embody, the computer software product is stored in a storage medium, including some instructions are used to so that a computer
Equipment（Can be personal computer, server, or network equipment etc.）Perform the complete of each embodiment methods described of the invention
Portion or part steps.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（ROM, Read-Only
Memory）, random access memory（RAM, Random Access Memory）, magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It may also be noted that in the apparatus of the present, it is clear that each part can be to decompose and/or reconfigure.
These decompose and/or reconfigure and should be regarded as equivalents of the invention.
The above, specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, and it is any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, should all contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (19)
1. it is a kind of for switch neutral pole automatically jumping method, it is characterised in that methods described includes：
The voltage of the leading-out terminal of the phase pole of detection switch；And
Voltage of the controller based on the leading-out terminal triggers actuator, controlling the trip status of the neutral pole of the switch, and
And the live wire of the controller is attached to the end of incoming cables of the phase pole of switch；
Wherein described actuator promotes neutral pole to thread off.
2. method according to claim 1, it is characterised in that the voltage based on the leading-out terminal triggers actuator,
Further included with the process for controlling the trip status of the neutral pole of the switch：
When the voltage of the leading-out terminal is equal to or higher than predetermined voltage threshold, the neutral pole of actuator and the switch is not triggered not
Thread off；And
When the voltage of the leading-out terminal is less than the predetermined voltage threshold, triggering actuator is taken off with the neutral pole for controlling the switch
Button.
3. method according to claim 1, it is characterised in that the actuator is magnetictrip.
4. method according to claim 1, it is characterised in that methods described is further included：
Detection external signal, and
The voltage based on the leading-out terminal triggers actuator, controlling the process of the trip status of the neutral pole of the switch
Further include：
Voltage and external signal based on the leading-out terminal trigger actuator, controlling the dropout shape of the neutral pole of the switch
State.
5. method according to claim 4, it is characterised in that the mistake of the voltage and external signal based on the leading-out terminal
Journey further includes for the voltage and external signal of the leading-out terminal to carry out logic and operation.
6. method according to claim 5, it is characterised in that the external signal be over-pressed signal, under-voltage signal and point
Encourage one or more in signal.
7. method according to claim 6, it is characterised in that when the voltage for detecting the leading-out terminal be equal to or higher than it is predetermined
During voltage threshold, if the result triggering actuator according to logic and operation is threaded off with the neutral pole of controlling switch, neutral pole
Dropout part drive phase pole to thread off together.
8. method according to claim 7, it is characterised in that the de- mouth part of the neutral pole is one side dropout part.
9. method according to claim 1, it is characterised in that when the switch has multiple phase poles, detection with it is described
The neutral pole of switch close to a voltage for the leading-out terminal of phase pole.
10. it is a kind of for switch neutral pole automatically jumping equipment, it is characterised in that the equipment includes：
Detector, for the voltage of the leading-out terminal of the phase pole of detection switch；
Controller, the live wire that actuator and the controller are triggered for the voltage based on the leading-out terminal is attached to switch
Phase pole end of incoming cables；And
Actuator, the trip status of the neutral pole for controlling the switch under the control of the controller；
Wherein described actuator promotes neutral pole to thread off.
11. equipment according to claim 10, it is characterised in that：
When the voltage that the detector detects the leading-out terminal is equal to or higher than predetermined voltage threshold, the controller is not triggered
Actuator, and the neutral pole of the switch do not thread off；And
When the voltage that the detector detects the leading-out terminal is less than the predetermined voltage threshold, the controller triggering actuating
Device, and the actuator promotes the neutral pole of the switch to thread off.
12. equipment according to claim 10, it is characterised in that the actuator is magnetictrip, and the control
Device processed is assembling printing board PCB A.
13. equipment according to claim 12, it is characterised in that the live wire of the PCBA is connected to the phase pole of the switch
End of incoming cables, and the magnetictrip is connected with the live wire serial connection of the PCBA.
14. equipment according to claim 10, it is characterised in that：
The detector further detects external signal, and
Voltage of the controller based on the leading-out terminal and external signal trigger actuator, to control the neutral pole of the switch
Trip status.
15. equipment according to claim 14, it is characterised in that the detector is and door.
16. equipment according to claim 15, it is characterised in that the external signal be over-pressed signal, under-voltage signal and
One or more in shunt opening signal.
17. equipment according to claim 16, it is characterised in that when the detector detects voltage of the leading-out terminal etc.
When predetermined voltage threshold, if the controller triggers actuator with controlling switch according to the operation result with door
Neutral pole is threaded off, then the dropout part of neutral pole drives phase pole to thread off together.
18. equipment according to claim 17, it is characterised in that the dropout part of the neutral pole is one side dropout part.
19. equipment according to claim 10, it is characterised in that when the switch has multiple phase poles, the detection
Device detect with the neutral pole of the switch close to a voltage for the leading-out terminal of phase pole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294772.1A CN103595019B (en) | 2012-08-17 | 2012-08-17 | For the method and apparatus of the automatically jumping of the neutral pole of switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210294772.1A CN103595019B (en) | 2012-08-17 | 2012-08-17 | For the method and apparatus of the automatically jumping of the neutral pole of switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103595019A CN103595019A (en) | 2014-02-19 |
| CN103595019B true CN103595019B (en) | 2017-07-07 |
Family
ID=50085054
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210294772.1A Active CN103595019B (en) | 2012-08-17 | 2012-08-17 | For the method and apparatus of the automatically jumping of the neutral pole of switch |
Country Status (1)
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| CN (1) | CN103595019B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2230060Y (en) * | 1995-06-22 | 1996-06-26 | 吴震宇 | Protective arrangement for neutral wire for disconnection |
| CN1477747A (en) * | 2002-07-18 | 2004-02-25 | 施耐德电器工业公司 | Apparatus for monitoring neutral wire and earth wire, and electric switch device containing the same |
| CN202759215U (en) * | 2012-08-17 | 2013-02-27 | 施耐德电器工业公司 | Equipment used for free tripping neutral pole of switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103048578A (en) * | 2006-11-24 | 2013-04-17 | 杰米那资产管理（6）有限公司 | Power supply monitoring system |
-
2012
- 2012-08-17 CN CN201210294772.1A patent/CN103595019B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2230060Y (en) * | 1995-06-22 | 1996-06-26 | 吴震宇 | Protective arrangement for neutral wire for disconnection |
| CN1477747A (en) * | 2002-07-18 | 2004-02-25 | 施耐德电器工业公司 | Apparatus for monitoring neutral wire and earth wire, and electric switch device containing the same |
| CN202759215U (en) * | 2012-08-17 | 2013-02-27 | 施耐德电器工业公司 | Equipment used for free tripping neutral pole of switch |
Non-Patent Citations (1)
| Title |
|---|
| 实现三相四线制供电系统中性线断线保护智能装置的研究;王勇等;《低压电器》;20110315(第5期);第18-22页以及第31页 * |
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| Publication number | Publication date |
|---|---|
| CN103595019A (en) | 2014-02-19 |
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