CN1311496C - Polyphase circuit breaker and switchboard - Google Patents
Polyphase circuit breaker and switchboard Download PDFInfo
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- CN1311496C CN1311496C CNB2003101240324A CN200310124032A CN1311496C CN 1311496 C CN1311496 C CN 1311496C CN B2003101240324 A CNB2003101240324 A CN B2003101240324A CN 200310124032 A CN200310124032 A CN 200310124032A CN 1311496 C CN1311496 C CN 1311496C
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Abstract
The present invention relates to polyphase breaker and distribution board circuit links, which are suitable the sub-effective use of a breaker/ distribution board, and the sub-effective use is caused by proximity effect when large ac currents pass. In the breaker, a current carrying electrode of each phase is divided into two parallel parts at lease to form a plurality of discrete parallel paths of the electrodes; the discrete paths are arranged in the way that inphase discrete paths are mutually spaced by centered discrete paths which are selected from discrete paths of other phases. Meanwhile, the combined two part design of a polyphase breaker casing is disclosed and is used for accommodating the selected discrete polyphase current carrying electrodes with consistent interelectrode intervals. The breaker is suitable for better heat radiation, and thereby, the problem of overheating and breakdown caused by the overheating can be avoided; meanwhile, the breaker/ distribution board has the capacity of adapting large electromotive force at the short circuit time.
Description
Technical field
The present invention relates to a kind of multi-phase circuit breaker, distribution board circuit (links) etc., it is applicable to time effectively use (sub-effective use) and better heat radiation of solution circuit breaker/distribution board, the effective use of this time is that the proximity effect (proximity effects) when flowing through these conductors by high alternating current causes, thereby avoided overheated and problem its collapse that is caused, simultaneously, this circuit breaker/distribution board has the ability of the big electromotive force when adapting to short circuit.
Background technology
The common function of circuit breaker is different, and is optionally used according to operated voltage.Therefore the circuit breaker that is used for low pressure (alternating voltage generally is lower than 1000V) is applied to the scope of operating current in the 7000A level usually.The said equipment is mainly used in the three phase arrangement.
As everyone knows, in order to handle big like this electric current, the main current-carrying path that is commonly called the utmost point of circuit breaker is made up of several parallel electrically conductive paths.
In the time of in about 3000A, circuit breaker only has a utmost point usually.Yet when rated current was bigger, owing to electrode and relevant distribution huger being difficult to that become handles, for this reason, some manufacturers were divided into two described electrode.
Yet; during a plurality of parallel electrically conductive path in start using circuit breaker; find but that when needing to handle big alternating current the performance of above-mentioned circuit breaker can be subjected to the unnecessary heating and the complexity of therefore following that is heated parts and/or the influence of collapse (complexities and/or break down) of circuit breaker usually.
The present inventor finds, when the bigger electric current of a plurality of paralleled paths experience/carrying, the interchange current-carrying utmost point of circuit breaker can suffer damage because of the problem of collection skin (skin) and/or proximity effect, and influence the distribution of electric current in path, afterwards cause circuit breaker overheated, and the possibility of same complexity/collapse.
Importantly, be pointed out that especially that when circuit breaker was handled alternating current, proximity effect caused electric current only to flow in the periphery (distant periphery) of conductor.This is actually time effectively use to the sectional area of the conductor in the circuit breaker.Because effective resistance is inversely proportional to sectional area, will cause bigger effective resistance or R ac, and may be overheated.
In addition, be designed at three-phase breaker under the situation of R, Y and B, Y fully is clipped between R and the B, thereby has bad heat radiation.Because the rising of temperature is the arithmetical difference of heating and heat radiation, although other two keep low temperature mutually, is the rated value that Y is indicating circuit breaker mutually.
And under the situation of above-mentioned interchange current-carrying circuit breaker short circuit, big electromotive force pushes away and draws described electrode based on changing the electric current of direction in the same way/oppositely and rapidly, from and can influence the performance of current capacity and circuit breaker.
Summary of the invention
Therefore, basic purpose of the present invention provides a kind of multi-phase circuit breaker, its be specially adapted to solve by bigger alternating current proximity effect produced, overheated and the inferior problem of effectively using of the interchange current of circuit breaker, and support better heat radiation, thereby avoided overheated and problem its collapse that is caused, had the ability of big electromotive force when adapting to short circuit simultaneously.
Another object of the present invention provides multi-phase circuit breaker, improves its performance by making even distribution of big AC load electric current in the current-carrying path, and the resistance (R ac) of electric current is reduced, thereby avoid unnecessary heating and relevant issues thereof.
Another object of the present invention provides a kind of multi-phase circuit breaker, the electrode of its three-phase sorts like this, by providing the current-carrying utmost point in the circuit breaker more uniform and in check heat distribution, make because heat that the difference of heating and heat radiation causes or temperature rising are effectively controlled.
And when further purpose was intended to solve the short circuit of circuit breaker, big electromotive force pushed away and the relevant defective of drawing described electrode based on changing the electric current of direction in the same way/oppositely and rapidly.
And, another object of the present invention aims to provide a kind of case for circuit breaker of remodeling, be applicable to the interchange current of placing circuit breaker with discrete structure, thereby the proximity effect problem when making bigger alternating current can be avoided, and support circuit breaker better to dispel the heat and performance, under short-circuit conditions, has adaptability simultaneously to big electromotive force.
Another purpose of the present invention aims to provide circuit breaker, and it can hold discrete electrode structure, supports effective use of these discrete paths, keeps circuit breaker compact and friendly user's shell and assemblage characteristic simultaneously.
And another purpose of the present invention provides distribution board, and it supports the even distribution of alternating current in its current-carrying path/electrode, keeps switchboard equipment low temperature, and the performance of improving distribution board.
For this reason,, provide a kind of multi-phase circuit breaker, having comprised according to this basic scheme of the present invention:
A plurality of current-carrying utmost points, the current-carrying best of every phase is divided into two parallel portion less, to constitute a plurality of discrete paralleled path of described electrode, described discrete path is so arranged, the discrete path of homophase is by a placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other phases.
According to a preferred version, this multinomial circuit breaker is a three phase arrangement, comprising:
A plurality of current-carrying utmost points, the current-carrying best of every phase is divided into two parts less, to constitute a plurality of discrete paralleled path of described electrode, described discrete path is so arranged, the discrete path of one phase is by placed in the middle a plurality of discrete path institute space, and this a plurality of discrete path placed in the middle is selected from the discrete path of other two-phases.
According to another scheme of the present invention, a kind of multi-phase circuit breaker is provided, comprising:
The current-carrying best that comprises every phase of neutral phase (neutral) is divided into two parts less, to constitute a plurality of discrete paralleled path of described electrode, described discrete path is so arranged, the discrete path of one phase is by placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other phases.
In above-mentioned circuit breaker of the present invention, the parallel pole of each phase and unlike practices well mutual placed adjacent, but inserted by the discrete path in the centre of another phase.Importantly, the mutual adjacent arrangement of this out of phase two discrete paths of difference, avoided the problem of kelvin effect (skin effect) and/or proximity effect, thereby solved its produce overheated and and then the problem of the collapse that causes, have the adaptability of the big electromotive force when handling short circuit simultaneously.
According to a preferred version of the present invention, the current-carrying utmost point of every phase is divided into two parts, to limit two parallel poles of every phase, is inserted into the discrete path of other two-phases between the described parallel pole.
According to another scheme of the present invention, this multi-phase circuit breaker has selectable current-carrying path, is divided into two parallel portion comprising every utmost point of each phase of neutral phase, and these two parts are arranged as, and the discrete path of placed adjacent belongs to different phases.
According to another preferred version of the present invention, a kind of multi-phase circuit breaker is provided, comprise a three-phase breaker with three corresponding utmost points (R, Y and B), each described utmost point (R/Y/B) is divided into two part (R1, R2/Y1, Y2/B1, B2), wherein said electrode is staggeredly placed belongs to different phases (R1-Y1-B1-R2-Y2-B2) for the discrete path that makes placed adjacent.
According to another preferred version of the present invention, a kind of multi-phase circuit breaker is provided, comprise: comprise the mutually a plurality of of the corresponding utmost point of having of neutral phase (N, R, Y and B), described every utmost point (N/R/Y/B) is divided into two part (N1, N2/R1, R2/Y1, Y2 and B1, B2), wherein said electrode is staggeredly placed and is belonged to different phases (N1-R1-Y1-B1-N2-R2-Y2-B2) for the discrete path that makes placed adjacent.
According to another scheme of the present invention, a kind of circuit breaker is provided, comprising:
Two parts shell, described each part are used for holding respectively a discrete path of current-carrying of each phase, and are arranged as, and the discrete path of homophase is by placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other phases;
Described part also is suitable for releasably fixing (releasably secured) and makes that spacing is consistent between path, and limits the compact width of circuit breaker jointly.
According to a preferred version, above-mentioned circuit breaker, particularly two parts shell, it has stipulated that the distance between two adjacent lanes of described discrete path remains in the scope of 30-40mm.
And according to further preferred version, mutually the effective separation between realizes like this: the glass that is filled with unsaturated polyester (UP) (unsaturated polyester) material by thin-walled form is provided is with required firm separation between realizing mutually.
At the above-mentioned breaker structure that is used for holding discrete path, in order to solve proximity effect, divide equally in the part (halves) at two and can select to provide current transformer (current transformer).The electric current of respectively dividing part equally is added and delivers to protection equipment.This can support to develop transformer accurately.
The further scheme according to the present invention provides a kind of distribution board (switchboard) that comprises heterogeneous operating system, comprising:
A plurality of current-carrying utmost points, the current-carrying best that comprises every phase of neutral phase is divided into two parts less, to constitute a plurality of discrete paralleled path of described electrode, described discrete path is so arranged, the discrete path of one phase is by placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other phases.
Above the arranged/sorted of current-carrying path in disclosed multi-phase circuit breaker/distribution board effectively utilized difference between AC resistance (being called R ac) and the D.C. resistance (being called R dc), and make the ratio of R ac/Rdc more level off to 1.
R dc is the resistance of current-carrying path when the carrying direct current, and R ac is the respective value when carrying alternating current.When handling alternating current, kelvin effect and proximity effect cause electric current only to flow in the periphery of conductor.This is actually time effectively utilization long-pending to cross-sectional area of conductor.
Because effective resistance is inversely proportional to sectional area, thereby can cause bigger effective AC resistance or R ac.
In the present invention, the two poles of the earth of phase are not to be adjacent to mutually be used arbitrarily, but are inserted into a parallel pole of other phases.Kelvin effect and/or proximity effect have been avoided in this arrangement, and make the distribution of alternating current of the conductor in the circuit breaker of flowing through more consistent.
When R dc value under any circumstance all remained unchanged, R ac value reduced, and causes ratio more to level off to 1.By I
2The thermal loss that R ac is determined reduces, thereby has improved the performance of circuit breaker.
And in the routine ordering, the Y that is clipped in fully between R and B is found heat radiation worse off cake mutually.Because the increase of temperature is the arithmetical difference of heating and heat radiation, although R and B temperature are low, is the rated value that Y is indicating circuit breaker mutually.This plug-in type is placed (intervening disposition) the balanced radiating condition of making peace is provided more.
Under short-circuit conditions, big electromotive force pushes away and draws described electrode based on the electric current that also changes direction in the same way/oppositely rapidly.Because the intensity and the distribution that have reduced electromotive force are inserted in segmentation (sub-division).
Importantly, under the situation of utilizing this plug-in type to arrange, the discrete path of current-carrying device can be used effectively, particularly when needs connect long circuit (links).Native system makes the insertion of the connection (link connections) that extends to this circuit more convenient, and effective AC resistance of above-mentioned circuit also can reduce, and whole distribution board temperature when operation is lower, and perhaps the material that needs when carrying identical electric current still less.
Description of drawings
Details of the present invention, purpose and advantage are passed through with reference to the accompanying drawings, and nonrestrictive example is described and will be described more specifically, wherein:
Fig. 1 shows current distributions;
Fig. 2 shows the new arrangement according to the electrode of circuit breaker of the present invention;
Fig. 3 A, 3B show the new arrangement according to the electrode in the distribution board of the present invention/current-carrying device;
Fig. 3 C shows the structure according to two parts of the combination shell of the circuit breaker that holds a plurality of discrete paths of the present invention; And
Two parts that Fig. 3 D shows at this combination shell are interfixed, with the placement of the utmost point of insertion after the compact case that limits above-mentioned circuit breaker.
Embodiment
As shown in Figure 1, Fig. 1 shows the distribution of electric current in the current-carrying path in all cases, also shows the placement of above-mentioned path among Fig. 1.Conductor 1,2, the point in 3,4,5 and 6 is represented CURRENT DISTRIBUTION.Conductor 1 shows DC current distribution.Conductor 2 shows the CURRENT DISTRIBUTION of alternating current when not adjacent with any other current, the kelvin effect of wherein having demonstrated.The alternating current that conductor 3 and 4 shows when the electric current co-flow distributes, and the alternating current that conductor 5 and 6 then shows when reverse direction current flow distributes.Both of these case shows in exchanging distribution, and proximity effect is superimposed on or the situation among kelvin effect.By above-mentioned apparent, under the situation of direct current current, the used or net sectional area of conductor obviously reduces.
Please refer to Fig. 2 now, it shows the sectional view according to circuit breaker of the present invention, and wherein the distribution of electrode just as proposed by the present invention.
Can see obviously that from above-mentioned Fig. 2 replace the arrangement architecture of conventional three-phase (R, Y and B), promptly parallel discrete path is arranged as R1 and R2, Y1 and Y2 and B1 and B2, according to the present invention, electrode is arranged as R1-Y1-B1-R2-Y2-B2.Selectivity placement/the arrangement of aforesaid insertion electrode or ordering balance proximity effect, thereby the R ac value of all phases is reduced, while R dc value is remained valid.The ratio of lower R ac/R dc can cause lower thermal loss, or lower operating temperature, or bigger rated current that may be continuous.
Under 50000A level and above fault current thereof, conductor repels mutually or attracts to depend on sense of current, and has as by each equation F=α l
p 2The brute force (high force) of/S decision, wherein F represents the power between the conductor, l
pBe the peak value of electric current, S is the distance between conductor.
In the placement of above-mentioned current, the theoretical current of every utmost point is divided into two, and simultaneously, the coverage between increases mutually.This obviously reduces electromotive force, and makes circuit breaker can handle bigger short circuit current.
Please refer to Fig. 3 A now, 3B, wherein Jiao Cuo circuit breaker design helps to insert the joint that extends to distribution board and need not complexity.Because the length of current-carrying path amounts to several meters form for these circuits, with regard to the reduction of any system R ac, clean benefit is still bigger, makes whole system keep low temperature when operation.
Please refer to accompanying drawing 3C and 3D now, it shows the selected change in the case for circuit breaker of the present invention, with the structure of the insertion between the discrete path of realizing multi-phase circuit breaker.
Shown in Fig. 3 C, be achieved in that the advantage that discrete path is provided on the one hand according to the combining structure of shell of the present invention, keep the compactness of case for circuit breaker and the width of wanting on the other hand.By it is evident that among the above-mentioned figure, this shell is divided into two parts C1 and C2.Preferably, described each part is provided with the parts that are used to hold discrete path, thereby hold a discrete path of current-carrying of each phase respectively, and be arranged as, the discrete path of homophase is selected from a centre discrete path institute space in the discrete path of other phases.The clear arrangement that has shown these discrete paths of combination shell shown in Fig. 3 D, the electrode arrangement shown in it is B2-Y2-R2-B1-Y1-R1.
Therefore importantly, said structure helps to utilize simple mould (dyestuff) to form compact shell, and these discrete heterogeneous utmost points that hold circuit breaker can be provided.This two-part shell also provides device, and is releasable fixing to support these two parts.For this purpose, proposed a kind of complicated dove tail tenon (dovetail) design, this design realizes by increasing electrode.
Importantly, this arrangement has guaranteed that spacing 8 is consistent between path.Gap between path (clearance) 7 remains on the 30-40mm level.In order to help plug-in type to arrange, selectivity provides gap 7 between discrete path, and this discrete path can more effectively be separated by the glass that is filled with unsaturated polyester material of thin-walled 9 forms.The current transformer 10 that illustrates simultaneously in the above-mentioned arrangement optionally is provided at two and is divided equally in the part.This electric current is added and delivers to protection equipment.
Therefore, pass through foregoing invention, make the bigger effective resistance that provides simple and have between the current carrying part of cost-benefit multi-phase circuit breaker and each phase become possibility, this multi-phase circuit breaker by make kelvin effect and proximity effect invalid/reduce the alternating current resistance that reduces circuit breaker master current carrying part.Such arrangement can provide a kind of circuit breaker, and it can not produce too many heat when operation, and can handle bigger continuous current.Electromotive force between this system also can reduce mutually, thus make circuit breaker can be applicable to bigger short circuit current.Importantly, the particularly staggered current-carrying circuit of system of the present invention is arranged and can be used to distribution board, and has the advantage of the AC resistance R ac that reduces long quilt link length.
Claims (18)
1. multi-phase circuit breaker comprises:
A plurality of current-carrying utmost points, the current-carrying best of every phase is divided into two parallel portion less, to constitute a plurality of discrete paralleled path of these current-carrying utmost points, described discrete path is so arranged, the discrete path of homophase is by placed in the middle discrete path institute space, and described discrete path placed in the middle is selected from the discrete path of other phases.
2. multi-phase circuit breaker according to claim 1, it belongs to three phase arrangement, comprise: a plurality of current-carrying utmost points, the current-carrying best of every phase is divided into two parts less, to constitute a plurality of discrete paralleled path of described electrode, described discrete path is so arranged, and the discrete path of a phase is by placed in the middle a plurality of discrete path institute space, and described a plurality of discrete path placed in the middle is selected from the discrete path of other two-phases.
3. according to claim 1 or 2 each described multi-phase circuit breakers, comprising:
A plurality of current-carrying utmost points, the current-carrying best that comprises every phase of neutral phase is divided into two parts less, to constitute a plurality of discrete paralleled path of described a plurality of electrodes, described discrete path is so arranged, the discrete path of one phase is by placed in the middle discrete path institute space, and described discrete path placed in the middle is selected from the discrete path of other phases.
4. multi-phase circuit breaker according to claim 1, wherein, the described arrangement of adjacent out of phase two discrete paths of difference mutually can selectively be set to, and can effectively avoid the problem of kelvin effect and/or proximity effect.
5. multi-phase circuit breaker according to claim 1, wherein, the current-carrying utmost point of every phase is divided into two parts, to limit two parallel poles of every phase, is inserted into the discrete path of other two-phases between the described parallel pole.
6. multi-phase circuit breaker according to claim 1 comprises selectable current-carrying path, wherein, comprises that every utmost point of each phase of neutral phase is divided into two parallel portion, and these two parts are so arranged, and the discrete path of placed adjacent belongs to different phases.
7. multi-phase circuit breaker according to claim 1, comprise a three-phase breaker with three corresponding utmost points (R, Y and B), each described utmost point (R/Y/B) is divided into two part (R1, R2/Y1, Y2/B1, B2), the discrete path that is staggeredly placed to placed adjacent of wherein said electrode belongs to different phases (R1-Y1-B1-R2-Y2-B2).
8. multi-phase circuit breaker according to claim 1, comprise: comprise the corresponding utmost point (N of having of neutral phase, R, Y and B) mutually a plurality of, described every utmost point (N/R/Y/B) is divided into two parts (N1, N2/R1, R2/Y1, Y2 and B1, B2), wherein said electrode is staggeredly placed belongs to different phases (N1-R1-Y1-B1-N2-R2-Y2-B2) for the discrete path that makes placed adjacent.
9. multi-phase circuit breaker according to claim 1, comprising:
Two parts shell, described each part are used for holding respectively the discrete path of at least one current-carrying of each phase, and so arrange, and the discrete path of homophase is by placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other phases;
Described part also is suitable for releasably fixing and makes that spacing is consistent between path, and limits the compact width of circuit breaker jointly.
10. multi-phase circuit breaker according to claim 9, wherein, described two parts shell has stipulated that the distance between two adjacent lanes of described discrete path remains in the scope of 30-40 millimeter.
11. multi-phase circuit breaker according to claim 10, wherein, the effective separation between the described discrete path realizes that by separator this separator is the glass that is filled with unsaturated polyester material of thin-walled form.
12. multi-phase circuit breaker according to claim 10, wherein, two parts of this shell also comprise current transformer.
13. multi-phase circuit breaker according to claim 1 is used to reduce the big electromotive force under the short-circuit conditions, described big electromotive force pushes away and draws described electrode based on changing the electric current of direction in the same way/oppositely and rapidly.
14. a distribution board that comprises heterogeneous operating system comprises:
A plurality of current-carrying utmost points, the current-carrying best of every phase is divided into two parts less, and to constitute a plurality of discrete paralleled path of these current-carrying utmost points, described discrete path is so arranged, the discrete path of homophase is by placed in the middle discrete path institute space, and this discrete path placed in the middle is selected from the discrete path of other a plurality of phases.
15. the distribution board that comprises heterogeneous operating system according to claim 14, wherein, described a plurality of neutral phases that comprise mutually.
16. the distribution board that comprises heterogeneous operating system according to claim 14, wherein, the arranged/sorted of described current-carrying path is to be used to make ratio R ac/Rdc more to level off to 1.
17. the distribution board that comprises heterogeneous operating system according to claim 14, wherein, described current-carrying path is used to make ratio R ac/Rdc more to level off to 1.
18. the distribution board that comprises heterogeneous operating system according to claim 14 is used to reduce the big electromotive force under the short-circuit conditions, described big electromotive force pushes away and draws described electrode based on changing the electric current of direction in the same way/oppositely and rapidly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101240324A CN1311496C (en) | 2003-12-31 | 2003-12-31 | Polyphase circuit breaker and switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101240324A CN1311496C (en) | 2003-12-31 | 2003-12-31 | Polyphase circuit breaker and switchboard |
Publications (2)
| Publication Number | Publication Date |
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| CN1635597A CN1635597A (en) | 2005-07-06 |
| CN1311496C true CN1311496C (en) | 2007-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101240324A Expired - Fee Related CN1311496C (en) | 2003-12-31 | 2003-12-31 | Polyphase circuit breaker and switchboard |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0818797A1 (en) * | 1996-07-11 | 1998-01-14 | Legrand | Electrical apparatus with input and output terminals at the same side of the housing |
| CN1200552A (en) * | 1997-05-28 | 1998-12-02 | 尹顿公司 | Combined wire lead and interphase barrier for power switches |
-
2003
- 2003-12-31 CN CNB2003101240324A patent/CN1311496C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0818797A1 (en) * | 1996-07-11 | 1998-01-14 | Legrand | Electrical apparatus with input and output terminals at the same side of the housing |
| CN1200552A (en) * | 1997-05-28 | 1998-12-02 | 尹顿公司 | Combined wire lead and interphase barrier for power switches |
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| Publication number | Publication date |
|---|---|
| CN1635597A (en) | 2005-07-06 |
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