CN1113029A - Inturruptor for sub-line - Google Patents
Inturruptor for sub-line Download PDFInfo
- Publication number
- CN1113029A CN1113029A CN 95101909 CN95101909A CN1113029A CN 1113029 A CN1113029 A CN 1113029A CN 95101909 CN95101909 CN 95101909 CN 95101909 A CN95101909 A CN 95101909A CN 1113029 A CN1113029 A CN 1113029A
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- Prior art keywords
- magnetic
- contact
- inturruptor
- sub
- line
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
This breaker of wiring is provided with a rectangular magnetic substance which forms a closed magnetic circuit which surrounds a mobile contact attached to the head of a mobile contactor and a fixed contact attached to the head of the conductor of the fixed contactor consisting of the conductors and being the two side parts being bent to oppose each other. Hereby, the magnetic fluxes generated in the space on both sides of the conductor of the fixed contact shoe pass through the magnetic substance, so the density of magnetic flux in the space between the mobile contact and the fixed contact being the space where the arc occurs becomes large. And, both the mobile piece resiliency FM and the arc repulsion force FA become large, and arc extinguishing capacity improved.
Description
The present invention relates to a kind of Inturruptor for sub-line that is provided with for the overcurrent of blocking circuit, the magnetic body structure in particularly a kind of switching portion that is arranged on this contact in order to improve the arc extinguishing ability.
Circuit breaker also comprises Inturruptor for sub-line, its vital task be big electric current such as blocking-up short circuit current etc. with protective circuit, thought various ways in order to block bigger electric current reliably.
Figure 13 is the front view of the contact switching portion of the existing Inturruptor for sub-line of expression, and Figure 14 is the view of seeing from its direction of arrow F.Contact switching portion is made of following each several part in these figure: by the movable contact 12 of the drive mechanism of not drawing in figure be installed in the movable part 1 that the travelling contact 11 of its front end is formed; By the fixed contact 22 of U font be installed in the fixed part 2 that the fixed contact 21 of one side front end is formed; Surround the space that travelling contact 11 and fixed contact 21 are wherein arranged and the コ font magnetic 3 of opening downwards; And guarantee between this magnetic 3 and fixed part 2, the movable part 1 insulation and because produce electric arc between travelling contact 11 and the fixed contact 21 when disconnecting, in order to protect the insulation board 4 of magnetic 3.Magnetic 3 is because need to surround the driving scope of movable contact 12, so become long along the vertical direction shape.The position that movable part 1 usefulness solid line is represented is to be in its travelling contact 11 and fixed contact 21 contacted " closing " state, and the position of representing with the two point locking wire among Fig. 1 is to be in "open" state.
The electric current I that flows in movable part 1, fixed part 2 flows along the direction shown in the arrow among the figure.Fixed contact 22 is made the U font so that it produces repulsion to movable part 1.That is to say, if being housed, two limits of U font of the fixed contact 21 of fixed contact 22 are respectively conductor 221, conductor 222, the sense of current that flows in these conductors 221 and 222 becomes opposite direction as shown in the figure, the electric current of movable contact 12 is with more close its current opposite in direction of conductor 221.Thereby on movable contact 12, produce from the repulsion of fixed contact 22 disengagings.This repulsion is referred to as movable part repulsion.Magnetic 3 is set is in order big electromagnetic force to be acted on when the open circuit between travelling contact 11 and fixed contact 21 the produced simultaneously electric arc of movable part repulsion therewith, so that arc extinguishing easily, the electromagnetic force that this electric arc is produced is called the electric arc actuating force.That is to say, as following, by the electric current that in movable contact 12 and fixed contact 22, flows, produce magnetic flux along the direction vertical with the paper of Figure 13, the magnetic circuit that コ font magnetic 3 passes through as this magnetic flux is set, the space magnetomotive consumption in addition that produces electric arc is reduced, thereby can produce the big magnetic flux of arc space generation.Be designated as B as the magnetic flux density that will produce the position of electric arc, the length of electric arc be designated as L, then electric arc actuating force F
ABe shown below.
F
A＝IBL
Table 1
Because as ignore magnetic characteristic non-linear of magnetic 3, magnetic flux density B is directly proportional with electric current I, so final electric arc actuating force F
AWith square being directly proportional of electric current I.Above-mentioned movable part repulsion F
MSquare be directly proportional with electric current I too.Thereby, the electric arc actuating force F that helps its arc extinguishing ability to improve
AWith movable part repulsion F
MHas the characteristic that increases with electric current.
Figure 15 is the Distribution of Magnetic Field figure of the contact switching portion of Figure 13, Inturruptor for sub-line shown in Figure 14.The equal and opposite in direction of the electric current I that in movable contact 12, conductor 221, conductor 222, flows, direction as shown in Figure 13, movable contact 12 is equidirectional with the electric current in the conductor 222, is rightabouts and have only the electric current of conductor 221.The curve representation magnetic line of force, its density is directly proportional with magnetic flux density.That is to say that the magnetic line of force is close more, the magnetic flux density B of this position is big more.Travelling contact 11 and fixed contact 21 are not shown at this, and the position that electric arc takes place is between movable contact 12 and conductor 221, and as seen from the figure, the magnetic line of force is concentrated in this section, and magnetic flux density B is big.The most magnetic lines of force of this part are by magnetic 3.Thereby the magnetic flux density of this part is owing to the body 3 that is magnetic becomes big.
Figure 16 is expression and the above-mentioned front view of comparing the contact switching portion of the existing Inturruptor for sub-line that different magnetic shapes are arranged, and Figure 17 is the view that Figure 16 sees from the direction of arrow.In these figure, fixed part 2 is identical with above-mentioned existing example with movable part 1, and its difference is the コ font that magnetic 3G is upward opening.コ font bridge formation portion is owing to the space that is configured between conductor 221 and the conductor 222, promptly near producing the movable contact 12 in space and the position in the space between the conductor 221 as electric arc, so as shown in the figure, the size of the above-below direction of magnetic 3G is compared with above-mentioned magnetic 3 and can be done little a lot.
Figure 18 is the Distribution of Magnetic Field figure of the contact switching portion of Figure 16, Inturruptor for sub-line shown in Figure 17.Identical with the situation of Figure 15, most of to produce the space by electric arc be that the magnetic flux in the space between movable contact 12 and the conductor 221 is by magnetic 3G, owing to be provided with magnetic 3G, the magnetic flux density increase of this part.
The magnetic 3 of the shape image pattern 15 of magnetic is made the font to the コ of under shed like that, or the magnetic 3G of image pattern 18 makes the コ font of upward opening like that, consider that feature separately adopts suitable mode.Except that the size difference of above-below direction as described above, in two kinds of variform magnetics, electric arc actuating force F
AWith movable part repulsion F
MMagnitude relationship also different.That is to say that the magnetic 3 of Figure 15 is compared with the magnetic 3G of Figure 18 by following table 1 as can be known, and movable part repulsion F is arranged
MElectric arc actuating force F greatly,
ALittle such relation.Thereby, when the shape of selecting magnetic, configuration mode, also to consider the difference of such electromagnetic force size.
As mentioned above, the magnetic that adopts in the contact switching portion of existing Inturruptor for sub-line is made
Font.So, when magnetic 3 during under shed, the magnetic flux that produces between conductor 221 and conductor 222 is little to the contribution that the magnetic flux density that makes electric arc produce the space increases, and when magnetic 3G upward opening, in contrast, the not effectively contribution of magnetic flux that then produces at movable part 1 superjacent air space.
Purpose of the present invention is exactly to provide a kind of and can make electric arc actuating force F for solving such problem
A, movable part repulsion F
MIncrease the Inturruptor for sub-line that the arc extinguishing ability improves simultaneously.
In order to solve above-mentioned problem, Inturruptor for sub-line of the present invention is equipped with: the fixed contact of U font and be arranged on fixed contact on this fixed contact one side leading section, with the movable contact of drive mechanism be arranged on not travelling contact on the front end that the driving mechanism of movable contact therewith links that side, fashionable at circuit breaker closing, its fixed contact contacts with travelling contact, it is characterized in that being provided with the magnetic that forms the closed magnetic circuit that surrounds fixed contact and travelling contact.Magnetic is rectangle, can dispose relatively by the peristome of two font magnetics and form, also can make the dimensional configurations of two leading section space regulation of two コ font magnetics, also can make the overlapped configuration of two two front ends of コ font magnetic, or make the protuberance that faces toward mutually be arranged on the position that is inserted with movable contact of closed magnetic circuit inboard.
In structure of the present invention, by the magnetic that forms the closed magnetic circuit that surrounds fixed contact and travelling contact is set, one side of the conductor on the U word both sides of formation fixed contact is equipped with fixed contact, because the magnetic flux that produces in this space, side conductor both sides all pass through in the magnetic, so the magnetic flux density of the generation arc space that passes through in these flux concentrating just becomes greatly.Form the magnetic of closed magnetic circuit, can adopt cuboid, magnetic that magnetic resistance is little, also can form the closed-loop path by making its peristome relatively dispose two コ font magnetics, at this moment, as make the size of two leading section space regulations dispose two コ font magnetics, even then the size viscosity variation of two コ font magnetics does not have much obstruction to making yet.By making two leading section dispose two コ font magnetics, can become the same little magnetic of magnetic resistance of magnetic resistance and above-mentioned rectangle magnetic with overlapping each other.Be arranged on the position that accompanies movable contact of rectangle inboard by the protuberance that will face toward mutually, can make by the magnetic flux between the protuberance increases.
Fig. 1 is the front view of the contact switching portion of expression Inturruptor for sub-line first embodiment of the present invention.
Fig. 2 is the view of seeing from the arrow A direction of Fig. 1.
Fig. 3 is the Distribution of Magnetic Field figure of contact switching portion shown in Figure 2.
Fig. 4 is the perspective view that omits the contact switching portion of the magnetic among Fig. 1, Fig. 2.
Fig. 5 is the front view of contact switching portion of the Inturruptor for sub-line of expression second embodiment of the invention.
Fig. 6 is the view of seeing from the arrow B direction of Fig. 5.
Fig. 7 is the front view of contact switching portion of the Inturruptor for sub-line of expression third embodiment of the invention.
Fig. 8 is the view of seeing from the arrow C direction of Fig. 7.
Fig. 9 is the front view of contact switching portion of the Inturruptor for sub-line of expression fourth embodiment of the invention.
Figure 10 is the view of seeing from the arrow D direction of Fig. 9.
Figure 11 is the front view of contact switching portion of the Inturruptor for sub-line of expression fifth embodiment of the invention.
Figure 12 is the view of seeing from the arrow E direction of Figure 11.
Figure 13 is the front view of the contact switching portion of existing Inturruptor for sub-line.
Figure 14 is the view of seeing from the arrow F direction of Figure 13.
Figure 15 is the Distribution of Magnetic Field figure of contact switching portion shown in Figure 14.
Figure 16 is the front view of the contact switching portion of the existing Inturruptor for sub-line different with Figure 13.
Figure 17 is the view of seeing from the arrow G direction of Figure 16.
Figure 18 is the Distribution of Magnetic Field figure of contact switching portion shown in Figure 17.
The present invention will be described according to embodiment below.Fig. 1 is the front view of contact switching portion of the Inturruptor for sub-line of the embodiment of the invention, Fig. 2 is the view of seeing from the arrow A direction among Fig. 1, represent with same label that with Figure 13,14 identical structure members similarly structure member adds alphabetical A and represents no longer detailed description behind label.
In these figure, magnetic 3A does rectangularity as shown in Figure 2, makes its conductor 221 of being arranged to surround movable contact 12 and fixed contact 22, forms closed magnetic circuit as magnetic circuit.Insulator 4 is combined with magnetic 3A and is also done rectangularity, is configured in the inboard of magnetic 3A.Usually insulator 4 disconnects in conductor 221 parts.Movable contact 12 and conductor 221 pass through from the encirclement of magnetic 3A, because the electric current I opposite sign but equal magnitude of circulation on movable contact 12 and conductor 221, so the magnetomotive summation along the rectangle limit of magnetic 3A is zero, thereby not along the magnetic flux composition of the closed magnetic circuit circulation of magnetic 3A.Therefore, even adopt closed magnetic circuit also to have no impact.
Fig. 3 is the Distribution of Magnetic Field figure of Fig. 1, contact switching portion shown in Figure 2.With this figure and above-mentioned Figure 15, Figure 18 as seen, magnetic flux and Figure 15 that space above movable contact 12 generates are similar, magnetic flux and Figure 18 of generating between conductor 221 and conductor 222 are similar, and each magnetic flux of space between movable contact 12 and conductor 221 is merged together.Thereby it is all bigger than in above-mentioned two prior art examples any one to produce the magnetic flux density B in space at electric arc.
Fig. 4 is the perspective view that has omitted the contact switching portion of magnetic.Illustrate in order to block electric current, travelling contact 11 and the state that fixed contact 21 leaves have produced the electric arc 200 that makes two contacts 11,21 form electrical connection this moment.Electric current I flows into from the right side of conductor 221, and sequential flow flows out from the right side of movable contact 12 then through fixed contact 21, electric arc 200, travelling contact 11, movable contact 12.The electric current that the direction that flows through in movable contact 12 and conductor 221 is opposite produces the electromagnetic force of repelling mutually, and this electromagnetic force is movable part repulsion F
M, be power upwards as shown like that.Because these electric currents, generate magnetic flux in the space that produces electric arc 200 again, the result of this magnetic flux and the electromagnetic action of the electric current I that flows through electric arc 200 produces the electric arc actuating force F along direction shown in the figure
A
Obtain the repulsion F of movable part according to the magnetic field calculation result
M, the current density i and the amassing in the total cross-section scope of movable contact 12 of this position magnetic flux density B of flowing in the cross section of movable contact 12 are carried out integration.Because electric current, magnetic flux are for exchanging, phase place is identical, can calculate with effective value or peak value simply.Electric arc actuating force F
A, be with the long-pending integration that carries out along the electric current I of the electric arc of setting 200 and the magnetic flux density component vertical with the direction of this electric current I, at this moment, when the magnetic flux density direction is different, owing to the direction of the power of electric arc 200 each several parts is also inequality, will be to the vector integration.
Table 1 is for being electric arc actuating force F under the different condition of magnetic
AWith movable part repulsion F
MComparison sheet, carry out magnetic field calculation with said method by computer and calculate.The situation of getting nonmagnetic body compares the magnetic 3 of Figure 15, the magnetic 3G of Figure 18 and the magnetic 3A of Fig. 3 as fiducial value.Design conditions are defined as: electric current I=20KA, the long 3mm in gap between fixed contact 21 and the travelling contact 22 etc.Again, the length of movable contact 12, conductor 221,222 is limited, in order conveniently to be approximately endless on calculating.Thereby the numerical value of this table only illustrates the tendency of magnitude relationship, because the accuracy of numerical value is not high, has omitted the more detailed design conditions such as size of component parts.
Numerical value in the table is: the outer numerical table of parantheses shows that unit is each power of newton (N), and the numerical table in the parantheses shows the value of the no magnet ratio as 100 o'clock.
Thus table as can be known, as Figure 15 of example before, the situation of Figure 18, wherein the situation of Figure 18 is to compare electric arc actuating force F during with nonmagnetic body
AWith movable part repulsion F
MAll increase 10～20%.Here it is is provided with the effect of magnetic 3 or 3G.The value of Figure 15 and Figure 18 compares, the electric arc actuating force F of Figure 18
AGreatly, the movable part repulsion F of Figure 15
MGreatly.
With the value of the value of Fig. 3 and Figure 15, Figure 18 more as can be known, electric arc actuating force F
AIdentical with the value among Figure 18, movable part repulsion F
MValue than any example in the past is all big.
Fig. 5 is the front view of the contact switching portion of second embodiment of the invention, Fig. 6 is the view that the arrow B direction is seen from Fig. 5, with Fig. 1, the same numeral of Fig. 2 same structure parts, the similar structures parts add that behind label letter b replaces original label A, no longer describes in detail.Magnetic 3B compares with the magnetic 3A of Fig. 1, and the lateral dimension of Fig. 5 is that width dimensions is little, and fixed contact 21, travelling contact 11 all highlight from the width range of magnetic B.Because this width is more little, the increase of magnetic flux is more little, and two contacts 11,21 outstanding after, the magnetic flux density that electric arc produces the space diminishes, so the contact switching portion of final Fig. 5, Fig. 6 compares its movable part repulsion F with the contact switching portion of Fig. 1, Fig. 2
M, electric arc actuating force F
AAll diminish.But magnetic 3B is littler, in light weight than the size of magnetic 3A, thereby the low benefit of cost is arranged.So obtaining the necessary parts repulsion F of association that lives
MWith electric arc actuating force F
APrerequisite under can adopt the size of suitable magnetic.
Fig. 7 is the front view of the contact switching portion of third embodiment of the invention, Fig. 8 is the view that the arrow C direction is seen from Fig. 7, represent with same label that with the parts of Fig. 1, Fig. 2 same structure the similar structures parts are added letter C and replaced original alphabetical A behind label, no longer describe in detail.In these figure, magnetic 3C is divided into upper magnetic body 3C
1With bottom magnetic 3C
2Two ones up and down.Upper magnetic body 3C
1For to the コ of under shed font, bottom magnetic 3C
2Be the コ font of upward opening, its leading section is oppositely arranged apart from one another by suitable space, in their inboard insulator 4C is set.It is fixed that the size in space can be come by the easy degree of the operations such as magnetic 3C of packing into.Because the size in this space does not have much influences to the magnetic flux that passes in the magnetic 3C, so can adopt the structure in such space.
As magnetic 3A, 3B, when magnetic is not made 1 rectangle, exist situations such as making difficulty, the contact switching portion difficulty of packing into.Under such situation,, the making of magnetic and assembling are carried out easily by being divided into up and down two and suitable space is set like this.
Fig. 9 is the front view of contact switching portion of the Inturruptor for sub-line of fourth embodiment of the invention, Figure 10 is the view that arrow D direction is seen from Fig. 9, represent with same numeral with Fig. 7, Fig. 8 same structure parts, the similar structures parts add alphabetical D and replace original letter C behind label, no longer describe in detail.In these figure, magnetic 3D is by forming to the font upper magnetic body 3D1 of under shed and the コ font bottom magnetic 3D2 of upward opening, this point is identical with the magnetic 3C of the 3rd embodiment of Fig. 7, Fig. 8, and difference is to make upper magnetic body 3D1 and each leading section overlap joint combination of bottom magnetic 3D2.Be that upper magnetic body 3D1 embedding bottom magnetic 3D2 is assembled like that.Thereby owing to there is not the such gap of magnetic 3C on the closed magnetic circuit of magnetic 3D, its magnetic resistance is and the equal big or small value of the magnetic 3A of first embodiment.So owing to when wishing that magnetic resistance reaches that desired little degree and making etc. are former thereby suitable to be divided into up and down two-part structure, just can adopt magnetic 3D.
Figure 11 is the front view of the Inturruptor for sub-line of fifth embodiment of the invention, Figure 12 is the view that the arrow E direction is seen from Figure 11, represent with same numeral that with Fig. 1, Fig. 2 same structure parts the similar structures parts add letter e and replace original alphabetical A behind label, do not describe in detail in addition.In these figure, protuberance 3E1 is set on magnetic 3E, this protuberance 3E1 is outstanding from the position that dual-side accompanies movable contact 12 to the inside.This position is the space that produces electric arc, and the magnetic flux by magnetic 3E from then on protuberance 3E1 comes out.That is to say that magnetic flux passes through between the protuberance 3E1 of both sides.Owing to the length of the space part of this part is shortened by protuberance 3E1 is set, thus between the protuberance 3E1 of both sides flux concentrating, it is big that magnetic flux density B becomes.This just makes electric arc actuating force F
ABecome big.
Magnetic 3E constitutes by on the magnetic 3A of first embodiment protuberance 3E1 being set.Because protuberance 3E1 and the structure-irrelevant that the magnetic before the protuberance 3E1 is set,, can obtain the effect identical with magnetic 3E so on each magnetic 3B, 3C of the 2nd～the 4th embodiment, 3D, protuberance 3E1 is set.
As mentioned above, the present invention is by means of the magnetic that forms the closed magnetic circuit that surrounds travelling contact and fixed contact is set, a side is provided with fixed contact in the U word both sides conductor of fixed contact, because the magnetic flux that generates in the space, both sides that accompanies this side conductor all passes through from magnetic, so can make and produce the space at electric arc is that the magnetic flux density in the space between fixed contact and the travelling contact becomes big, movable part repulsion F
MWith electric arc actuating force F
AAlso all become big, thereby obtain the effect that the arc extinguishing ability improves.
And, as the magnetic that forms the closed-loop path, can adopt the little magnetic of rectangle and magnetic resistance, also can adopt two コ font magnetic, its peristome is disposed relatively form the closed-loop path, at that time, dispose as size with two leading section spaces regulations of two コ font magnetics, even then the dimensional accuracy of two コ font magnetics is not high, there are not much influences to making yet.Also can also can become the magnetic that has with the equal big or small magnetic resistance of above-mentioned rectangle magnetic by with two overlapped configurations of leading section of two コ font magnetics.In addition, be arranged on the position that the rectangle inboard accompanies movable contact by the protuberance that will face toward mutually, also can obtain to make by the magnetic flux between the protuberance increases, and then makes movable part repulsion F
M, electric arc actuating force F
AIncrease, the arc extinguishing ability improves such effect.
Claims (6)
1, a kind of Inturruptor for sub-line, it has: U font fixed contact and be located at fixed contact on the leading section of this fixed contact one side, with the movable contact of drive mechanism be arranged on not travelling contact on the front end that the driving mechanism of movable contact therewith links that side, contact with travelling contact at the fashionable fixed contact of circuit breaker closing, it is characterized in that: be provided with the magnetic that forms the closed magnetic circuit that surrounds fixed contact and travelling contact.
2,, it is characterized in that magnetic is an oblong-shaped according to the said Inturruptor for sub-line of claim 1.
3,, it is characterized in that described magnetic is made of two コ font magnetics that peristome is oppositely arranged according to the said Inturruptor for sub-line of claim 1.
4, according to the said Inturruptor for sub-line of claim 3, it is characterized in that described two コ font magnetics, the size of two leading section space regulation is provided with.
5, according to the said Inturruptor for sub-line of claim 3, it is characterized in that described two コ font magnetics, two leading section overlaps each other and is provided with.
6,, it is characterized in that being provided with relative protuberance mutually in the position that accompanies movable contact of closed magnetic circuit inboard according to the said Inturruptor for sub-line of each claim in the claim 1～5.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1072294A JPH07220610A (en) | 1994-02-02 | 1994-02-02 | Breaker for wiring |
| JP010722/94 | 1994-02-02 | ||
| JP010722/1994 | 1994-02-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1113029A true CN1113029A (en) | 1995-12-06 |
| CN1048818C CN1048818C (en) | 2000-01-26 |
Family
ID=11758186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101909 Expired - Fee Related CN1048818C (en) | 1994-02-02 | 1995-02-02 | Inturruptor for sub-line |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH07220610A (en) |
| CN (1) | CN1048818C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377273C (en) * | 2004-03-30 | 2008-03-26 | 富士电机机器制御株式会社 | Arc-extinguishing device of circuit breaker |
| CN101038835B (en) * | 2006-03-13 | 2012-07-04 | 富士电机机器制御株式会社 | Circuit breaker |
| CN102931041A (en) * | 2012-11-13 | 2013-02-13 | 安德利集团有限公司 | Arc guiding and extinguishing apparatus and DC breaker using same |
| CN101981647B (en) * | 2008-04-04 | 2013-10-30 | 三菱电机株式会社 | Short circuit detection apparatus for circuit breaker |
| CN110473751A (en) * | 2018-05-11 | 2019-11-19 | Ls产电株式会社 | Inturruptor for sub-line |
-
1994
- 1994-02-02 JP JP1072294A patent/JPH07220610A/en active Pending
-
1995
- 1995-02-02 CN CN 95101909 patent/CN1048818C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100377273C (en) * | 2004-03-30 | 2008-03-26 | 富士电机机器制御株式会社 | Arc-extinguishing device of circuit breaker |
| CN101038835B (en) * | 2006-03-13 | 2012-07-04 | 富士电机机器制御株式会社 | Circuit breaker |
| CN101981647B (en) * | 2008-04-04 | 2013-10-30 | 三菱电机株式会社 | Short circuit detection apparatus for circuit breaker |
| CN102931041A (en) * | 2012-11-13 | 2013-02-13 | 安德利集团有限公司 | Arc guiding and extinguishing apparatus and DC breaker using same |
| CN102931041B (en) * | 2012-11-13 | 2015-08-26 | 安德利集团有限公司 | A kind ofly lead arc arc-control device and use this to lead the DC circuit breaker of arc arc-control device |
| CN110473751A (en) * | 2018-05-11 | 2019-11-19 | Ls产电株式会社 | Inturruptor for sub-line |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1048818C (en) | 2000-01-26 |
| JPH07220610A (en) | 1995-08-18 |
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