EP1756924A1 - Leistungsschalter mit einer innerhalb eines kapselungsgehäu- ses angeordneten unterbrechereinheit - Google Patents
Leistungsschalter mit einer innerhalb eines kapselungsgehäu- ses angeordneten unterbrechereinheitInfo
- Publication number
- EP1756924A1 EP1756924A1 EP05753202A EP05753202A EP1756924A1 EP 1756924 A1 EP1756924 A1 EP 1756924A1 EP 05753202 A EP05753202 A EP 05753202A EP 05753202 A EP05753202 A EP 05753202A EP 1756924 A1 EP1756924 A1 EP 1756924A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- current path
- interrupter unit
- contact
- path section
- circuit breaker
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
Definitions
- the invention relates to circuit breakers with an interrupter unit arranged within an encapsulation housing, which has a first contact piece and a second contact piece, the contact pieces being arranged to be movable relative to one another and axially opposite one another, and with a first current path section for supplying an electrical current to the first Contact piece and a second current path section for supplying an electrical current to the second contact piece, wherein the current path sections are part of the interrupter unit and at least one of the current path sections has a connection contact and is movable relative to a stationary counter contact.
- Such a circuit breaker is known for example from DE 44 38 776 Cl.
- the circuit breaker there is part of a metal-enclosed electrical high-voltage switchgear. Connections for connecting two disconnectors are arranged at a first end of the circuit breaker there.
- plug contacts are provided, one of which is designed as a knife contact and the other as a pin-shaped contact.
- Disconnectors are necessary in order to connect the circuit breaker to different busbar sections or supply lines. In addition to the disconnectors themselves, space is required for the disconnector drives.
- the invention has for its object to provide a circuit breaker that can be easily connected to different busbar or line sections with small dimensions.
- the object is achieved in that the current path section can be moved by means of a drive device when the encapsulation housing is closed.
- the interrupter unit of the circuit breaker is surrounded by an insulating gas under increased pressure, for example sulfur hexafluoride or nitrogen, within a closed encapsulation housing.
- This insulating gas enables the separation of large potential differences at short distances.
- a separation point can be formed between the connection contact and the counter contact by moving at least one of the current path sections. By means of the drive it is possible to carry out the movement of the current path sections repeatedly. As a result of the movement of the interrupter unit itself or of parts of the interrupter unit
- Isolation points can be generated within the encapsulation housing, there is no need for additional circuit breakers requiring additional construction volume.
- the current path section is rotatably mounted.
- a rotatable mounting of the current path sections makes it possible to move the connection contact on a circular path and thus to move in and out of the counter contact. It can be provided that the contact pieces of the interrupter unit can also be rotated relative to one another. It is particularly advantageous if the contact pieces can be positioned relative to one another in different positions. This enables more even contact wear. Burning points and abrasion on the contact pieces are spread over a larger surface area.
- the current path section is axially displaceable.
- connection contact Due to the axial displacement, the connection contact can be moved into the mating contact on a linear path.
- a combination of a rotary movement and an axial movement of the current path section makes it possible to generate a movement of the connection contact on a spiral path. Such movements can be generated relatively easily by superimposing a rotary movement of the current path section with simultaneous axial displacement.
- An advantageous embodiment can further provide that the interrupter unit has a first current path section and a second current path section, the two current path sections being movable together.
- a joint movement of two current path sections makes it possible to hold onto the previous design of an interrupter unit of a circuit breaker and to move it in its entirety.
- the current path sections of an interrupter unit are approximately tubular and are arranged at the ends in the axial direction of the interrupter unit. It can be provided that the current path sections are designed to be mechanically stable in such a way that they form a type of support frame or chassis to which the further parts of the interruption unit are attached.
- the current path sections are arranged concentrically with the contact pieces, wherein the contact pieces can be both nominal current and arcing contact pieces.
- the current path sections surround the contact system of the interrupter unit.
- the contact system of the interrupter unit can also include compression devices for generating a stream of extinguishing gas, storage volume for receiving heated extinguishing gas, arc spaces within which an arc burns, or an insulating material nozzle which serves for guiding and transferring forces between the two sides of the interrupter unit with the two current path sections , exhibit.
- the current path sections surround the end of the interrupter unit and form the outer contour of the interrupter unit.
- the current path sections can be designed to be mechanically stable and absorb load capacities and / or serve as a screen element for an electrical field.
- the current path sections can be referred to as contact carriers, which hold and carry the actual contact system and serve to supply electrical current to it.
- the interrupter unit has a first current path section and a has second current path section, the two current path sections being movable independently of one another.
- connection contact is assigned to each of the current path sections.
- One outlet to the first or to the second busbar can be controlled by means of the two connection contacts. Since this control can take place separately from one another due to the independent mobility of the current path sections, the selection of the respective busbars can be made as desired.
- the connection contacts or the counter contacts are designed in such a way that an uninterrupted change from the first busbar to the second busbar and vice versa can be carried out.
- the cross coupling can be switched with the circuit breaker interrupter unit.
- the axis of rotation of a rotatably mounted current path section runs approximately parallel to the axial direction of the opposing contact pieces.
- the circuit breaker interrupter units have an essentially elongated tubular outer contour. In the axial direction, the rounded outer contour are also the contact pieces aligned.
- the rotatable mounting approximately parallel to the axial direction of the opposing contact pieces enables the interrupter unit to be rotated in a very small space. Furthermore, with such an orientation of the axis of rotation, it is easily possible to transmit a drive movement from the outside to the contact pieces which can be moved relative to one another. Due to the essentially coaxial structure of the interrupter unit and a drive rod which is also arranged coaxially thereto, it is possible to transmit a switching movement to the interrupter unit, for example by means of a rotary coupling in the drive rod.
- connection contact is a moving contact element of an isolating switch device and / or an earth switch device.
- Disconnection devices are necessary to create additional disconnection points within an electrical conductor. This ensures that in the event of a circuit breaker failure or failure, there is no unwanted restoration of a conductor path. Unlocked sections can be earthed via an earth switch. This provides further protection in the event of incorrect operation or an error in an electrical switching device.
- the arrangement of moving contact elements on the current path sections or on one of the current path sections allows a connection of previously separate circuit breakers and disconnectors.
- a very compact control panel arrangement can thus be produced.
- This can be constructed in a modular manner, since all the power switching contacts, isolating switching contacts or earth contacts required are arranged within the gas space of the interrupter unit.
- a further advantageous embodiment can provide that the relative movement of the first and the second contact piece and the movement of the current path section (s) can be generated by a common drive device.
- the relative movement between the first and the second contact piece is generated, for example, by means of a switching rod arranged coaxially to the contact pieces. At least one of the contact pieces is connected via the switching rod to a drive arranged outside the encapsulation housing.
- a switching rod arranged coaxially to the contact pieces.
- At least one of the contact pieces is connected via the switching rod to a drive arranged outside the encapsulation housing.
- the drive rod moves further in the opening direction, so that an axial displacement of the interrupter unit or even only one of the current path sections of the interrupter unit is generated.
- This principle is reversed during a switch-on process, so that the current path section or the interrupter unit is first shifted into its power switching position and then the contact pieces are switched on by continuing the axial movement of the switch rod.
- the axial movement of the shift rod can be superimposed by a rotary movement, whereby a rotary movement and a drive movement can be generated independently of one another or combined with one another by a common drive device.
- a further advantageous embodiment can provide that the axial distance between the first and the second current path section is approximately constant. There is an almost constant axial distance between the first and second current path sections, for example, when the two current path sections are always moved in the same way. This is the case, for example, when a conventionally designed breaker unit has one
- Circuit breaker is axially displaceable and / or rotatably mounted.
- the axial distance between the first and the second current path section can be changed.
- the axial distance between the first and the second current path section can be changed when the two current path sections can be moved independently of one another. It can be provided, for example, that the current path sections of the interrupter unit are mounted independently of one another and can also be moved independently of one another.
- a separate displaceability of the current path sections can be achieved, for example, in that each of the current path sections can be driven independently, with mutual guidance via insulating elements, for example an insulating material nozzle, which is arranged coaxially with arcing contact pieces.
- insulating elements for example an insulating material nozzle
- other components can be provided for guiding the current path sections.
- the switching chamber of the interrupter unit can also be used for this.
- mutual support / guidance of the current path sections can also be completely dispensed with.
- each of the current path sections is supported and guided independently of one another at the ends.
- a free gas path can be formed between the halves of the interrupter unit and can perform an additional isolating function.
- FIG. 1 shows a section through a schematic representation of an interrupter unit
- FIG. 2 shows a section through a circuit breaker with an assembled interrupter unit
- FIG. 4 shows an application of the circuit breaker in an outdoor version
- FIG. 5 shows an embodiment variant of a circuit breaker with an axially displaceable and rotatably mounted interrupter unit.
- the circuit breaker unit 1 of a circuit breaker shown in FIG. 1 has a first contact piece 2 and a second contact piece 3.
- the two contact pieces 2, 3 are designed as arcing contact pieces and are arranged axially opposite one another.
- the first contact piece 2 is in the form of a tulip contact
- the second contact piece 3 is in the form of a bolt-shaped contact piece.
- a first rated current contact piece 4 is arranged concentrically with the first contact piece 2.
- concentric with the second contact piece 3 is a second nominal current contact piece 5 arranged.
- a movement from a drive (not shown in FIG. 1) to the first contact piece 2 and the first nominal current contact piece 4 can be transmitted via a drive rod 6.
- An insulating material nozzle 7 is arranged coaxially with the first contact piece 2.
- the insulating material nozzle 7 surrounds the first contact piece 2 and the second contact piece 3.
- the insulating material nozzle 7 itself is surrounded by the first nominal current contact piece 4 and the second nominal current contact piece 5.
- the insulating nozzle 7 is firmly connected to the first rated current contact piece 4 and the first contact piece 2.
- the free end of the insulating material nozzle 7 projects in the direction of the second contact piece 3 and the second nominal current contact piece 5 and is slidably mounted there to prevent vibrations.
- the interrupter unit 1 also has a first current path section 8 and a second current path section 9.
- the current path sections 8, 9 are substantially tubular and surround the contact system, so that a dielectric advantageous outer contour of the interrupter unit is created.
- the first current path section 8 and the second current path section 9 are formed, for example, from the first nominal current contact piece 4 and the second nominal current contact piece 5.
- the two current path sections 8, 9 are connected to one another in an angularly rigid manner by means of insulating rods 10a, b.
- the interrupter unit shown in FIG. 1 can be single-pole, for example be arranged isolated within an encapsulation housing. Alternatively, several of these interrupter units can also be arranged within a common encapsulation housing.
- FIG. 2 shows an installation of the interrupter unit 1 in an encapsulation housing 11.
- the first current path section 8 as well as the second current path section 9 and partly the insulating material nozzle 7 can be seen.
- assemblies provided with the same functions are given the same reference numerals.
- the coupling of the current path sections 8, 9 by means of insulating rods 10a, b was dispensed with. This makes it possible to rotate the two current path sections 8, 9 independently of one another.
- the interrupter unit 1 is rotatably arranged within the encapsulating housing 11.
- the axis of rotation runs through the axially opposite contact pieces.
- a rotary motion of a first drive device 12 is coupled into the interior of the housing via a gear.
- the first current path section 8 can be rotated by means of the first drive device 12.
- the second current path section 9 can be rotated inside the encapsulation housing 11 via a second drive device 13 and a gear arrangement.
- a third drive device 14 an axial movement can be transmitted via a drive rod 6 at least to the first contact piece 2 and the first nominal current contact piece 4.
- a relative movement between the first contact piece 2 and the second contact piece 3 can thus be generated.
- a first connection contact 15 is arranged on the first current path section 8, and a second connection contact 16 is arranged on the second current path section 9.
- the connection contacts 15, 16 project radially outward from the axial direction of the interrupter unit 1 (see cross-sectional illustration).
- Each of the connection contacts 15, 16 is assigned a stationary first mating contact 17a, b and a stationary second mating contact 18a, b.
- At the fixed counter contacts 17a, b; 18a, b for example, busbars, electrical lines, open air bushings or similar devices for supplying an electrical current can be connected.
- the current can be transmitted through electrically insulating areas through the encapsulation housing 11 made of electrically conductive material.
- the encapsulation housing 11 has an earth potential applied to it.
- the stationary counter-contacts 17a, b; 18a, b in the form of elastically deformable slot-shaped contacts, so that when the interrupter unit 1 or the first current path section 8 and / or the second current path section 9 rotates, the connection contacts 15, 16 designed as knife contacts into the counter contacts 17a, b; 18a, b can retract. It is also possible to exchange knife contacts and counter contacts for one another or to use other contact forms.
- ground contacts 19a, b are connected to the grounded encapsulation housing 11.
- connection contacts 15, 16 When the connection contacts 15, 16 are retracted, the grounding contacts 19a, b allow the first current path section 8 and the second current path section 9 to be grounded.
- connection contacts 15, 16 In a sector-shaped configuration of the connection contacts 15, 16, for example, and with a corresponding arrangement of the mating contacts, it is also possible to have one make an uninterrupted change from one counter contact to another counter contact. This is This is particularly advantageous if an uninterrupted busbar change is to be carried out.
- the two current path sections 8, 9, which each belong to one half of the contact system and are electrically conductively connected to this half, can be moved independently of one another by the independently operating first and second drive devices 12, 13.
- FIG. 3 shows an application of the interrupter unit known from FIG. 2.
- a first busbar 20 and a second busbar 21 are flanged to the circuit breaker.
- the first busbar 20 or the second busbar 21 can be contacted alternately via the first connection contact 15.
- a first cable 22 and a second cable 23 can be connected alternately via the second connection contact 16. It is now optionally possible to supply the first bus bar 20 or the second bus bar 21 via the first cable 22 or the second cable 23.
- the respective cable access or busbar outlet can be switched via the interrupter unit.
- other connections such as outdoor bushings, transformer connections, etc. can be used.
- FIG. 4 shows a modification of the circuit breaker arrangement shown in FIG. 3.
- the known circuit breaker has a dead tank design.
- a first outdoor bushing 24 and a second outdoor bushing 25 are flanged to the first counter contacts 17a, b.
- separation points can be formed for the outdoor bushings 24, 25.
- a corresponding connection for example of an electrical contacting of the first connection contact 15 with the mating contact 17a and a closed contact system of the interrupter unit, allows the second connection contact 16 to be moved into a grounding point. This makes it possible to earth a conductor path to the circuit breaker.
- FIG. 5 shows a second variant of a high-voltage circuit breaker 100.
- the high-voltage circuit breaker 100 has a modified interrupter unit 101.
- the interrupter unit 101 also has a first current path section 108 and a second current path section 109.
- the first current path section 108 and the second current path section 109 are rotatably mounted, as is known from the preceding examples.
- the first current path section 108 and the second current path section 109 are furthermore axially displaceable independently of one another. This makes it possible to also move the first connection contact 115 arranged on the first current path section 108 and the second connection contact 116 arranged on the second current path section 109 along the main axis of the interrupter unit 101.
- connection contacts 115, 116 This extends the possibility of contacting the connection contacts 115, 116.
- connection contacts 115, 116 Now there is the possibility of arranging a plurality of stationary counter contacts in several planes radially around the interrupter unit 101. If a rotary movement and an axial movement are superimposed, the connection contacts can also be moved on a spiral movement path. It can further be provided that a plurality of connection contacts 115, 116 are arranged on at least one of the current path sections 108, 109, so that a larger number of circuit variants can be generated.
- the counter contacts also move in a retraction direction, for example Provide axial or oblique direction so that contact can only be made with a certain rotational movement and / or axial movement of the interrupter unit 101 or the first current path section 108 or the second current path section 109.
- a rotating movement can be generated via separate drives.
- a drive 117 is provided for the axial displacement of the entire interrupter unit or only one of the current path sections 109.
- an axial displacement can be carried out via a spindle gear.
- a rotational movement of the second current path section 109 could be forced via a corresponding link guide.
- the drive rod 106 provided for driving the contact pieces of the interrupter unit 101 is provided for transmitting an axial movement to the entire interrupter unit 101 or to only the first current path section 108.
- the drive rod 106 is designed in such a way that it is set into a rotational movement. This rotary movement can be used, for example, to produce a rotary movement of the interrupter unit 101 or of the first current path section 108.
- the interrupter unit 101 or the first current path section 108 can also be axially displaced via the rotary movement.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004029871A DE102004029871A1 (de) | 2004-06-16 | 2004-06-16 | Leistungsschalter mit einer innerhalb eines Kapselungsgehäuses angeordneten Unterbrechereinheit |
PCT/DE2005/000916 WO2005124955A1 (de) | 2004-06-16 | 2005-05-13 | Leistungsschalter mit einer innerhalb eines kapselungsgehäu- ses angeordneten unterbrechereinheit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1756924A1 true EP1756924A1 (de) | 2007-02-28 |
Family
ID=34978968
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05753202A Withdrawn EP1756924A1 (de) | 2004-06-16 | 2005-05-13 | Leistungsschalter mit einer innerhalb eines kapselungsgehäu- ses angeordneten unterbrechereinheit |
Country Status (5)
Country | Link |
---|---|
US (1) | US7511243B2 (de) |
EP (1) | EP1756924A1 (de) |
CN (1) | CN1969436B (de) |
DE (1) | DE102004029871A1 (de) |
WO (1) | WO2005124955A1 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006031219A1 (de) * | 2006-06-30 | 2008-01-10 | Siemens Ag | Leistungsschalter mit einem Gehäuse |
AU2010346801B9 (en) * | 2010-02-23 | 2014-02-27 | Mitsubishi Electric Corporation | Power switching device |
DE112011104424B4 (de) * | 2010-12-17 | 2019-03-28 | Mitsubishi Electric Corporation | Gasisolierte Schaltanlage |
KR101145085B1 (ko) * | 2011-01-18 | 2012-05-11 | 현대중공업 주식회사 | 가스 절연 개폐장치 |
EP2568493B1 (de) * | 2011-09-06 | 2015-12-16 | ABB Research Ltd. | Hochspannungsschaltungsvorrichtung |
WO2014050184A1 (ja) * | 2012-09-26 | 2014-04-03 | 三菱電機株式会社 | 電力開閉装置 |
WO2016189956A1 (ja) * | 2015-05-26 | 2016-12-01 | 三菱電機株式会社 | 電気機器および電気機器の製造方法 |
DE102018203692A1 (de) * | 2018-03-12 | 2019-09-12 | Siemens Aktiengesellschaft | Schaltfeld |
JP6608097B1 (ja) * | 2019-01-31 | 2019-11-20 | 三菱電機株式会社 | 真空遮断器 |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
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US3857006A (en) * | 1973-10-30 | 1974-12-24 | Hitachi Ltd | Gas insulated switching apparatus |
DE2721258A1 (de) * | 1977-05-11 | 1978-11-23 | Siemens Ag | Elektrisches schaltfeld |
DE2818914A1 (de) * | 1978-04-28 | 1979-10-31 | Siemens Ag | Schalterkombination fuer sammelschienenanlagen |
JPS56107716A (en) * | 1980-01-28 | 1981-08-26 | Hitachi Ltd | Gas insulated electric equipment |
DE3421265A1 (de) | 1983-06-10 | 1984-12-13 | Mitsubishi Denki K.K., Tokio/Tokyo | Schaltgeraet |
DE9214177U1 (de) | 1992-10-21 | 1994-02-24 | Sachsenwerk Ag | Schaltanlage für Mittelspannung |
DE4438776C1 (de) * | 1994-10-21 | 1996-04-11 | Siemens Ag | Metallgekapselte elektrische Hochspannungsschaltanlage mit einem Leistungsschalter |
DE4445172C2 (de) * | 1994-12-17 | 1998-07-16 | Abb Patent Gmbh | Schaltfeld |
DE19511168A1 (de) * | 1995-03-28 | 1996-10-02 | Abb Management Ag | Schaltvorrichtung |
DE19606213A1 (de) * | 1995-08-18 | 1997-02-20 | Abb Patent Gmbh | Schaltfeld in einer elektrischen, metallgekapselten, gasisolierten Hochspannungsschaltanlage |
DE19608285A1 (de) * | 1996-02-23 | 1997-08-28 | Siemens Ag | Hochspannungsfreiluftschalter |
DE19613750A1 (de) * | 1996-03-28 | 1997-10-02 | Siemens Ag | Mittelspannungsschaltfeld mit Vakuumröhren |
US6144005A (en) | 1997-07-23 | 2000-11-07 | Hitachi, Ltd. | Vacuum switch and a vacuum switchgear using the same |
AU9186198A (en) * | 1997-09-29 | 1999-04-23 | Mitsubishi Denki Kabushiki Kaisha | Switch gear |
IT1302715B1 (it) * | 1998-10-20 | 2000-09-29 | Abb Ricerca Spa | Apparecchiatura di interruzione e sezionamento isolata in gas |
IT1302716B1 (it) * | 1998-10-20 | 2000-09-29 | Abb Ricerca Spa | Apparecchiatura blindata di interruzione e sezionamento. |
FR2790592B1 (fr) * | 1999-03-01 | 2001-04-06 | Alstom | Disjoncteur haute tension a double mouvement |
IT1313732B1 (it) * | 1999-09-15 | 2002-09-17 | Abb Ricerca Spa | Apparecchiatura di interruzione e sezionamento isolata in gas |
IT1313321B1 (it) * | 1999-10-01 | 2002-07-17 | Abb Ricerca Spa | Apparecchiatura di interruzione e sezionamento isolata in gas. |
FR2799895B1 (fr) * | 1999-10-15 | 2001-11-16 | Alstom | Commutateur electrique a enveloppe metallique compartimentee pour la mise en place de sectionneurs |
DE19958645C5 (de) * | 1999-12-06 | 2011-05-26 | Abb Technology Ag | Hybridleistungsschalter |
JP2002051414A (ja) * | 2000-08-02 | 2002-02-15 | Toshiba Corp | 複合形ガス絶縁開閉装置 |
JP2002051415A (ja) * | 2000-08-02 | 2002-02-15 | Toshiba Corp | 複合形ガス絶縁開閉装置 |
AU763276B2 (en) * | 2001-02-07 | 2003-07-17 | Hitachi Limited | Gas insulated switchgear |
FR2826503B1 (fr) * | 2001-06-25 | 2003-09-05 | Alstom | Chambre de coupure avec ampoule a vide |
FR2840729B1 (fr) * | 2002-06-05 | 2004-07-16 | Alstom | Dispositif interrupteur pour haute ou moyenne tension, a coupure mixte par vide et gaz |
-
2004
- 2004-06-16 DE DE102004029871A patent/DE102004029871A1/de not_active Withdrawn
-
2005
- 2005-05-13 EP EP05753202A patent/EP1756924A1/de not_active Withdrawn
- 2005-05-13 CN CN2005800196745A patent/CN1969436B/zh not_active Expired - Fee Related
- 2005-05-13 US US11/629,932 patent/US7511243B2/en not_active Expired - Fee Related
- 2005-05-13 WO PCT/DE2005/000916 patent/WO2005124955A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2005124955A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20080042786A1 (en) | 2008-02-21 |
WO2005124955A1 (de) | 2005-12-29 |
DE102004029871A1 (de) | 2006-02-16 |
US7511243B2 (en) | 2009-03-31 |
CN1969436B (zh) | 2011-01-19 |
CN1969436A (zh) | 2007-05-23 |
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