EP2786388A1 - Switching device suitable for direct-current operation - Google Patents
Switching device suitable for direct-current operationInfo
- Publication number
- EP2786388A1 EP2786388A1 EP12794313.2A EP12794313A EP2786388A1 EP 2786388 A1 EP2786388 A1 EP 2786388A1 EP 12794313 A EP12794313 A EP 12794313A EP 2786388 A1 EP2786388 A1 EP 2786388A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact
- arc
- switching device
- contacts
- switching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching effect Effects 0.000 claims abstract description 17
- 230000000712 assembly Effects 0.000 claims abstract description 6
- 238000000429 assembly Methods 0.000 claims abstract description 6
- 230000037430 deletion Effects 0.000 claims description 9
- 238000012217 deletion Methods 0.000 claims description 9
- 238000000926 separation method Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/36—Metal parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
- H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/54—Contact arrangements
- H01H50/546—Contact arrangements for contactors having bridging contacts
Definitions
- the invention relates to a switching device suitable for a DC operation with a housing having at least one contact pair with a first contact and a second contact, wherein at least one of the two contacts is movable and the two contacts in an on state of the switching device in contact with each other and in a switched off state of the switching device are out of contact with each other, with an arc runner assembly which generates a magnetic field at least in the region of the contact pair, and with a first arc guiding arrangement, by means of which an arc occurring between the contacts with a first current direction to a first extinguishing device for extinguishing the arc passed becomes.
- Such a switching device is known from EP 2 061 053 A2.
- a switching device for DC applications there is proposed to use the housing of a switching device for AC applications, wherein additionally at least one magnet is provided which has a magnetic field with substantially transverse to the separation paths of the current paths of the AC switching device field lines.
- the housing In the housing, three receiving areas are provided for each one flow path, wherein each current path is associated with a movable switching contact element and two opposing fixed switching contact elements.
- the three movable switching contact elements are jointly movable between a closed position, which corresponds to the switched-on state of the switching device, and an open position, which corresponds to a switched-off state of the switching device.
- each current path is each associated with two arc quenching devices, which are each in the form of individual stacked, electrically insulated from each other quenching plates are formed.
- each current path has two separating sections which, when the movable switching contact elements are open, extend between the ends thereof forming these ends associated first and second fixed switching contact elements. When opening the switch contact elements forms along the
- Arc quenching can be deleted. There at
- DC applications In DC applications, erasure of an arc can not be achieved due to zero current passage, as in AC applications, DC applications require the provision of a magnetic field which drives the arc into one of the arc quenching devices.
- This magnetic field is formed by permanent magnets, wherein a magnetic field is built up with field lines in an orientation which extend transversely to the separating lines and on these arcades forming a separating lines
- Arc quenching drives In this case, an arc between a first contact pair in the direction of a first arc quenching device and the arc between a second contact pair in a second
- Arc quenching device driven. Since the movement of the arcs depends on the current direction, the switching device is only for one current direction, i.
- Object of the present invention is to provide a switching device that can be operated independently of polarity, that is for different
- a switching device suitable for a DC operation which comprises a housing, at least one contact pair with a first contact and a second contact, wherein at least one of the two contacts is movable and the two contacts in an on state of the switching device in contact and in an off state of the switching device except
- an arc runner assembly which generates a magnetic field at least in the region of the contact pair, and a first arc guide arrangement, by means of which an arc occurring between the contacts with a first Current direction is passed to a first extinguishing device for extinguishing the arc comprises.
- a second arc guide arrangement is provided, by means of which an arc occurring between the contacts with one of the first current direction opposite second current direction to a second
- both extinguishing devices can be constructed similarly or identically.
- a similar structure of the extinguishing devices is given in particular by the fact that the extinguishing plates of the two extinguishing devices are identical when using a deion-extinguishing chamber with a plurality of extinguishing plates.
- the first arc guide arrangement may in this case be arranged such that an arc with a first current direction in a first direction to the first
- Extinguishing device is passed, wherein the second arc guide arrangement can be arranged such that an arc is deflected with a second flow direction in a direction parallel to the first direction second direction to the second extinguishing device and directed. Ultimately arcs are thus driven in both directions in the same direction in the respective extinguishing device.
- the extinguishing devices are thus also aligned in the same direction.
- the extinguishing devices are preferably located on a wall of the housing, wherein the extinguishing devices each have exhaust openings which point in the same direction and are aligned with openings in the housing.
- the first contact is preferably arranged on an upper side of a fixed contact carrier immovably held in the housing.
- the arc guiding arrangements are Preferably arranged such that an arc is passed with a first current direction along the upper side of the fixed contact carrier to the first erasing device and that an arc with a second current direction along an upper side facing away from the bottom of the fixed contact carrier to the second eraser is passed.
- the arc with the second current direction is therefore deflected by 180 ° with respect to the path the arc travels with the first current direction.
- the fixed contact carrier preferably extends between the two extinguishing devices. This results in a compact and symmetrical structure, wherein also the two extinguishing devices are separated by the fixed contact carrier and no further dividers must be provided.
- the arc guide assemblies each comprise a first baffle and a second baffle, wherein the first baffle extends from the first contact to the respective quenching device and wherein the second baffle extends from the second contact to the respective quenching device.
- the arc guide arrangements can be made particularly compact if the first guide plate is formed by a fixed contact carrier held immovably in the housing, on which the first contact is arranged.
- the fixed contact carrier also serves as a connection point for connection to an electrical conductor, so that the fixed contact carrier basically has the same potential as the first contact.
- the second baffle may be associated with a first contact movable bridge assembly on which the second contact is disposed.
- the second baffle thus has the same potential as the second contact.
- the second baffle may also be divided and a first part which is connected to a first contact movable bridge assembly and having a second part which is arranged immovably in the contact housing.
- the two guide blanks should be arranged such that the distance of the two guide plates, starting from the contacts to the respective extinguishing device increases in order to increase the voltage required to maintain an arc between the two baffles.
- the two baffles take the extinguishing device between them, so that the arcs are ultimately driven into the extinguishing device.
- the two extinguishing devices can be constructed identical to one another in order to ensure a simple construction of the switching device with standardized components.
- the extinguishing devices can be designed as a deion-extinguishing chambers with a plurality of mutually electrically isolated extinguishing plates.
- the arc guide assemblies may include at least one permanent magnet disposed between two pole plates, the pair of contacts being disposed between the pole plates.
- the arrangement of the pole plates ensures over a large area that a homogeneous magnetic field is created.
- two opposing permanent magnets may be provided, so that the pole plates are dispensable.
- the switching device can also be designed as a double-breaking switching device, in which two pairs of contacts, each with a first contact and a second contact, a double-breaking switch assembly are provided forming the second contacts are arranged on a movable to the first contacts bridge contactor.
- the second contacts are in each case in contact with one of the first contacts, with the bridge contact piece electrically connecting the two second contacts to one another. This means that the two pairs of contacts are serially connected in series.
- the arc guiding arrangements can then be mirror-inverted for both pairs of contacts be arranged on opposite sides of the bridge switching piece.
- a plurality of double interrupting switching arrangements can be arranged side by side, wherein the bridge switching pieces of the individual switching arrangements are actuated by a common switching bridge to provide a multi-pole switching device.
- FIG. 1 shows a longitudinal section through a housing of an inventive
- FIG 2 shows the switching device according to Figure 1 without housing
- Figure 3 is an arc runner assembly with a permanent magnet
- FIGs 1 and 2 show the switching device 1 according to the invention in perspective views, the angle is basically identical, but for the sake of clarity in the figures 2, the housing is not shown. Figures 1 and 2 will be described together below.
- the electrical switching device 1 comprises a total of two poles, i. two switching paths, namely a first switching path 2 and a second switching path 3.
- the two switching paths 2, 3 are each provided with a switch, as explained in more detail below, and thus can be electrically interrupted.
- the two switching paths 2, 3 can each be integrated into a DC circuit and are used to interrupt a Stromfius.
- the front in the figures 1 and 2 first switching path 2 is further explained below also representatively for the second switching path 3, since both switching paths 2, 3 are constructed identically.
- a housing 6 of the switching device 1 which per switching path 2, 3rd forms a switching chamber 7, in which the closer explained below switch per switching path 2, 3 is arranged.
- the first switching track 2 comprises a first terminal 4 and a second terminal 5 for connecting the first switching track 2 to terminals of a DC current circuit.
- the first terminal 4 is part of a first fixed contact carrier 8, which leads into the switching chamber 7, wherein the first terminal 4 protrudes from the housing 6.
- the first fixed contact carrier 8 On a top side 9, the first fixed contact carrier 8 carries a first contact 10, which can be brought into contact or out of contact with a second contact 11, which is movably arranged to the first contact 10.
- the first contact 10 and the second contact 11 form a first contact pair 12.
- a second fixed contact carrier 13 is arranged, which forms the second terminal 5.
- the second fixed contact carrier 13 is also guided into the switching chamber 7, wherein the second fixed contact carrier 13 protrudes with the second terminal 4 from the housing 6.
- the second fixed contact carrier 13 On a top side 14, the second fixed contact carrier 13 carries a further first contact 15.
- a further second contact 16 is movably arranged, wherein the first contact 15 and the second contact 16 are in contact and out of contact can be converted and together Make contact pair 17.
- the two second contacts 11, 16 are arranged on an electrically conductive bridge contact piece 18 and electrically connected to one another.
- the bridge contact piece 18 can be adjusted vertically in the orientation of the switching device 1 shown in Figures 1 and 2 between a raised position and a lowered position, wherein in the raised position, the switching device 1 is in an off state in which the second contacts 11 , 16 are not held in contact with the first contacts 10, 15.
- the second contacts 1 1, 16 are held in contact with the first contacts 10, 15, wherein this position corresponds to the switched state of the switching device.
- current can flow between the first terminal 4 and the second terminal 5. When switched off, the current conduction between the first terminal 4 and the second terminal 5 is interrupted.
- a switching bridge 19 is provided, which is arranged vertically displaceable in the housing 6 and which carries both the bridge switching element 18 of the first switching path 2 and a bridge switching element of the second switching path 3, so that both switching paths 2, 3 are switched synchronously ,
- the bridge switch piece 18 is vertically adjustable received within the switching bridge 19, wherein the bridge switching element 18 is acted upon in the raised position, as shown in Figures 1 and 2, by vertically downwardly acting spring means 21 against a stop 20 of the switching bridge 19 with force.
- the switching bridge 19 is further moved vertically downwards, wherein the bridge switching piece 18 lifts off from the stop 20 against the force of the spring means 21 until the switching bridge 19 occupies a lowermost position.
- the bridge switch piece 18 is acted upon by a defined spring force of the spring means 21 against the fixed contact carrier 8, 13 with force.
- first switching arrangement of the first contact pair 12 is explained in more detail, wherein this is designed identically and mirror-inverted to the second switching arrangement of the second contact pair 17.
- a first arc guide arrangement 22 and a second arc guide arrangement 23 are arranged in the area of the first contact pair 12.
- the two arc guiding arrangements 22, 23 are arranged vertically one above the other.
- an arc runner assembly 24 is provided, which is shown in detail in Figure 3.
- the arc runner assembly 24 includes two permanent magnets 28 each disposed between two pole plates 25, 26, 27. Overall, therefore, 3 pole plates, namely a middle pole plate 25 between the two permanent magnets 28 and a first outer pole plate 26 and a second outer pole plate 27 are provided.
- the permanent magnets 28 are located above the two arc guide assemblies 22, 23, wherein the pole plates 25, 26, 27 extend vertically downwards and the switching chambers 7 of the two switching paths 2, 3 laterally limit.
- the pole plates 25, 26, 27 are arranged in the region of the two first contact pairs 12 of both switching paths 2, 3 and cover the entire area of the two arc guide assemblies 22, 23.
- This arrangement of the permanent magnets 28 and the pole plates 25, 26, 27 ensures that between the pole plates 25, 26, 27, a homogeneous magnetic field is formed, which extends at right angles to the pole plates, wherein the field lines thus extend transversely to the direction of movement of the bridge contact piece 18.
- the field lines of the magnetic field formed by the arc runner assembly 24 also extend across an arc that may form between the first contact 10 and the second contact 11.
- the magnetic field produces a Lorentz force which acts on the arc and, depending on the orientation of the magnetic field and the current direction of the arc, drives it in a specific direction.
- the arc in Figure 1 would be driven to the left.
- An arc with reverse current direction, ie from the second contact 11 vertically down to the first contact 10, would first be driven to the right and, as will be explained below, deflected.
- the first arc guide arrangement 22 comprises a first guide plate, which in the present case is represented by the first fixed contact carrier 8. In principle, however, it is also conceivable that a separate baffle is provided for this purpose. Further, a second baffle 29 is provided, which is divided and comprises two parts. A first part 30 of the second baffle 29 is formed integrally with the bridge contact piece 18. A second part 31 of the second guide plate 29 is arranged immovably in the housing 6. The two parts 30, 31 of the second guide plate 29 merge into one another and have a narrow air gap at their point of separation.
- the first baffle in the form of the first fixed contact carrier 8 extends from the first Contact 10 to a first extinguishing device 32.
- the second baffle 29 extends from the second contact 11 to also to the first erase device 32.
- the two baffles 8, 29 are constructed such that they at their side facing away from the contacts 10, 11 ends the first Extinguishing device 32 record between them.
- the two baffles 8, 29 designed such that the distance between the two baffles 8, 29, starting from the first pair of contacts 12 in the direction of the first extinguishing device 32 increases. This ensures that the required voltage for maintaining an arc in the direction of the first extinguishing device 32 is greater.
- the duration for which the arcs exist determines the switching time of the switching device 1, since the current flow between the contacts 11, 12 is maintained. Furthermore, a large amount of heat is released by the arcs, which can lead to thermal destruction of the contacts 11, 12. Therefore, it is necessary to extinguish the arcs as quickly as possible, for which purpose the arc guiding arrangements 22, 23 and the extinguishing devices 32, 37 are provided.
- the first extinguishing device 32 is, like all other extinguishing devices, designed as a Deion-quenching chamber, which comprises a plurality of quenching plates 23, which are arranged at least approximately parallel to each other and are electrically isolated from each other.
- the second arc guide arrangement 23 is arranged on the underside 42 of the first fixed contact carrier 8 facing away from the upper side 9 of the first fixed contact carrier 8. It comprises a first baffle, which is likewise formed by the first fixed contact carrier 8, and a second baffle 34, which is divided into a first part 35 and a second part 36. The first part 35 of the second baffle 34 is fixedly connected to the switching bridge 19 and thus moves together with the bridge contact piece 18.
- the second part 36 of the second baffle 34 is immovably held in the housing 6.
- the second guide plate 34 runs comparable to the second guide plate 29 of the first arc guide arrangement 22 starting from the second contact 11 in the direction of a second deletion device 37.
- the second deletion device 37 is constructed identically to the first deletion device 32 and arranged on the underside 42 of the first fixed contact carrier 8.
- the first fixed contact carrier 8 thus extends between the two erasers 32, 37 therethrough.
- the second deletion device 37 is identical to the first deletion device 32, so that in this regard reference may be made to the description of the first deletion device 32.
- the second baffle 34 extends from the second contact 11, initially in a vertical direction downwards and thus extends from the top 9 of the first fixed contact carrier 8 to the bottom 42 thereof.
- the second guide plate 34 continues horizontally in the direction of the second deletion device 37. Subsequently, it continues to run obliquely down to the end, at which it encloses the second deletion device 37 together with the first fixed contact carrier 8.
- an emerging arc is thus fundamentally driven away from the switching bridge 9 in the direction of the respective extinguishing device 32, 37, so that thermal stress on the switching bridge 19 is avoided.
- the arc guiding arrangements and arc drive arrangements are provided on the second contact pair 17.
- the current direction of an arc between the contacts 10, 11 of the first contact pair 12 spatially aligned in an opposite direction than an arc between the contacts 15, 16 of the second contact pair 17.
- an arc is formed in the direction from the second contact 16 to the first contact 15 vertically downward.
- the magnetic field of the arc runner assembly 24 is to be aligned on the first contact pair 12 in a different direction than on second contact pair 17.
- FIG. 2 shows the individual extinguishing devices, wherein all extinguishing devices are constructed identically and the second extinguishing device 37 is explained in greater detail here by way of example.
- This comprises a frame 38, which has walls 39 of insulating material and in which the individual quenching plates 33 are accommodated.
- the extinguishing devices on exhaust openings 40 which are aligned with a housing opening 41 of the housing 6.
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12794313T PL2786388T3 (en) | 2011-11-29 | 2012-11-28 | Switch suitable for direct current operation |
EP12794313.2A EP2786388B1 (en) | 2011-11-29 | 2012-11-28 | Switch suitable for direct current operation |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11191216.8A EP2600371A1 (en) | 2011-11-29 | 2011-11-29 | Switch suitable for direct current operation |
PCT/EP2012/073792 WO2013079508A1 (en) | 2011-11-29 | 2012-11-28 | Switching device suitable for direct-current operation |
EP12794313.2A EP2786388B1 (en) | 2011-11-29 | 2012-11-28 | Switch suitable for direct current operation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2786388A1 true EP2786388A1 (en) | 2014-10-08 |
EP2786388B1 EP2786388B1 (en) | 2017-05-31 |
Family
ID=47263353
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11191216.8A Withdrawn EP2600371A1 (en) | 2011-11-29 | 2011-11-29 | Switch suitable for direct current operation |
EP12794313.2A Active EP2786388B1 (en) | 2011-11-29 | 2012-11-28 | Switch suitable for direct current operation |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11191216.8A Withdrawn EP2600371A1 (en) | 2011-11-29 | 2011-11-29 | Switch suitable for direct current operation |
Country Status (4)
Country | Link |
---|---|
US (1) | US20140347151A1 (en) |
EP (2) | EP2600371A1 (en) |
PL (1) | PL2786388T3 (en) |
WO (1) | WO2013079508A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9129761B2 (en) | 2012-12-20 | 2015-09-08 | Eaton Electrical Ip Gmbh & Co. Kg | Switching device suitable for direct current operation |
DE102014004843A1 (en) | 2014-04-02 | 2015-10-08 | Schaltbau Gmbh | DC contactor with additional switching capability for AC loads and polarity against the preferred direction of current |
GB201820594D0 (en) * | 2018-12-18 | 2019-01-30 | Eaton Intelligent Power Ltd | Contact unit for a switching device and switching device |
GB2582307A (en) | 2019-03-18 | 2020-09-23 | Eaton Intelligent Power Ltd | Switching device for fast disconnection of short-circuit currents |
KR102196740B1 (en) * | 2019-04-05 | 2020-12-30 | 엘에스일렉트릭(주) | Arc extinguishing unit for air circuit breaker for direct current |
CN111584292A (en) * | 2019-05-21 | 2020-08-25 | 杭州德睿达电气有限公司 | Arc extinguishing chamber of direct current quick circuit breaker |
KR102542380B1 (en) * | 2020-03-13 | 2023-06-12 | 엘에스일렉트릭(주) | Arc extinguish part and air circuit breaker include the same |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5138122A (en) * | 1990-08-29 | 1992-08-11 | Eaton Corporation | Bi-directional direct current switching apparatus having arc extinguishing chambers alternatively used according to polarity applied to said apparatus |
US5130504A (en) * | 1990-08-29 | 1992-07-14 | Eaton Corporation | Bi-directional direct current switching apparatus having bifurcated arc runners extending into separate arc extinguishing chambers |
DE102007054958A1 (en) | 2007-11-17 | 2009-06-04 | Moeller Gmbh | Switching device for DC applications |
EP2463876A1 (en) * | 2010-12-07 | 2012-06-13 | Eaton Industries GmbH | Switch with arcing chamber |
-
2011
- 2011-11-29 EP EP11191216.8A patent/EP2600371A1/en not_active Withdrawn
-
2012
- 2012-11-28 WO PCT/EP2012/073792 patent/WO2013079508A1/en active Application Filing
- 2012-11-28 PL PL12794313T patent/PL2786388T3/en unknown
- 2012-11-28 EP EP12794313.2A patent/EP2786388B1/en active Active
- 2012-11-28 US US14/360,946 patent/US20140347151A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2013079508A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20140347151A1 (en) | 2014-11-27 |
EP2600371A1 (en) | 2013-06-05 |
WO2013079508A1 (en) | 2013-06-06 |
PL2786388T3 (en) | 2017-11-30 |
EP2786388B1 (en) | 2017-05-31 |
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