EP2011135A1 - Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräte - Google Patents
Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräteInfo
- Publication number
- EP2011135A1 EP2011135A1 EP07724414A EP07724414A EP2011135A1 EP 2011135 A1 EP2011135 A1 EP 2011135A1 EP 07724414 A EP07724414 A EP 07724414A EP 07724414 A EP07724414 A EP 07724414A EP 2011135 A1 EP2011135 A1 EP 2011135A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- contact piece
- mold
- copper
- voltage
- casting
- 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- Withdrawn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
- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
- H01H33/6643—Contacts; Arc-extinguishing means, e.g. arcing rings having disc-shaped contacts subdivided in petal-like segments, e.g. by helical grooves
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/02—Contacts characterised by the material thereof
- H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches
- H01H1/0206—Contacts characterised by the material thereof specially adapted for vacuum switches containing as major components Cu and Cr
Definitions
- the invention relates to a method for producing a contact piece, as well as contact piece for low, medium, high voltage and generator switching devices, according to the preamble of claims 1 and 11.
- vacuum interrupters In many cases, low, medium voltage, high voltage and generator switching devices are equipped with vacuum interrupters.
- vacuum interrupters are known which are equipped with a radial magnetic field contact system (RMF).
- the radial magnetic field is generated by coil sickle elements.
- the sickle elements are created by slots which are incorporated in a contact piece plate.
- a slotted contact pot which generates the radial magnetic field on a circular ring surface.
- slots may also be required and incorporated.
- RMF contact systems An important advantage of RMF contact systems is the low current path resistance of the overall arrangement using a sufficiently large contact pressure force. This results in a simple system. As a rule, RMF contact pieces with a cylindrical shape are used whose outer edges are rounded to improve the dielectric properties.
- the current method for introducing the slots is a Zerspantechnisches method, a generation of the slots is done per contact piece. This also applies to the molding of an external contact geometry. The geotechnical generation of the contact piece geometry is naturally associated with corresponding costs.
- the invention is therefore based on the object to make a manufacturing process for contact pieces of the generic type even more economical.
- the inventive method for the production of contact pieces or a contact plate for vacuum interrupters is carried out so that the contact pieces after a chill casting - manufacturing process near net shape to a contact piece cast or cast by first the material is melted in a crucible and then poured into a metal mold, in which previously webs are introduced, the webs leave slots.
- both the outer geometry and the slot geometry are finally introduced into a blank directly in a production step of the contact piece.
- slots can be introduced to the surface aligned slots as well as slots that should be oriented at an angle to the surface.
- slots may extend to the outer circumference of a Ronde as well as within these ends.
- the aim of this consideration is the production of a contact material also from KupferChrom as the main composite material, but by a melt metallurgical process.
- This measure is also a powder production CuCr can be avoided, the "elements" are in the desired ratio at very high temperatures. - melted Crucible (1900 2200 0 C) in a ceramic process, the elements (base CuCr) completely dissolve in each other then.
- the melt is poured into a mold under a vacuum atmosphere or in an inert gas so that very high cooling rates can be achieved, and a shape is chosen which is close to the final contour of the contact piece (liquid -> solid -> room temperature) and also one or more With this method, the costs for the mechanical generation of the contact piece geometry can be partially or completely avoided.A further cost saving is achieved by reducing the required material use compared to a solid disk, the material volume of the Slots omitted, as well as possibly the usually necessary excess for a blank.
- the casting takes place under a protective gas Ar or H 2 or under a vacuum atmosphere in an oven, and the resulting composite material consists of a material combination of copper and chromium.
- the contact piece is cast successively consisting of at least 2 layers by at least one erosion resistant CuCr layer as the first layer and at least one further, at least consisting of pure copper material layer is poured into the same mold.
- the mold is divided, and is opened to trigger the finished contact piece.
- a further advantageous embodiment is that, at least for one layer, a combination with other materials is provided which include tungsten, tungsten carbide, molybdenum, platinum, zirconium, yttrium or palladium, in addition to e.g. Copper and / or silver.
- the chromium concentration in the composite material layer is between> 0 to 100 wt .-%, wherein when melting the CuCr material in addition to the copper material and chromium is partially or completely dissolved in the copper, so that during casting into the mold a very finely divided chromium precipitation takes place from the copper matrix.
- Ausserden a switching device is specified, the contact pieces is made according to one or more of the preceding method claims, and can be installed without further endab Wegserhusde finishing in a vacuum interrupter chamber.
- the basis for erosion-resistant contact pieces is usually a powder metallurgically produced composite of the powder components copper and chromium, which are produced by a sintering or sintering process.
- the contact piece can consist continuously of the material CuCr 25 but also be designed in two layers.
- pure copper is selected for high conductivity in this layer.
- the production of a ready-to-install contact piece can be achieved by selecting a melt-metallurgical production process in the following way:
- the materials are weighed into the chosen ratio in a crucible.
- the materials can be put into a crucible (eg MgO / ZrO) in powder form or, for cost reasons, as pellets, after which the material or materials and in the case of the CuCr Material to the dissolving of the elements, a complete solubility is obtained at temperatures between 1900 - 2200 0 C.
- the liquid metal is poured into a mold.
- This method is used in many applications, including to achieve a high cooling rate.
- the advantage of a very high cooling rate is that, especially with the CuCr in the copper matrix, the chromium precipitates very finely due to the existing miscibility gap (phase diagram).
- Advantage of this method is that the melt is poured into a mold also cooled, which has the outer contour of the component and also the slot geometry in the form of webs in the mold.
- the introduced webs can be used to further increase the cooling rate (across the cross section of the disks). It can be by this measure in addition to the desired shape a very fine crystalline material produced with also very fine chromium particles (dendrites) in the copper matrix.
- the tool After removal of the cast component there is a blank whose dimensions are close to the dimensions of the design drawing, however, the tool must be provided with the required shrinkage allowance.
- the design of the tool and the number of experiments can be shortened by the use of a corresponding chill casting software, which accounts for a large part of a possible and possibly occurring distortion, for example. during the subsequent solidification of the melt in advance (e.g., differences in density remaining in the casting, segregation, voids, pores, ).
- the manufacturing process can be carried out as usual under vacuum or hydrogen. However, at least in the meantime, a reducing atmosphere may be present during the production of a ready-to-install contact piece (annealing). After this reducing process step may then be advantageous to reduce the H 2 gas content in the material then a vacuum annealing.
- the contact piece can be calibrated in a further pressing process and thus brought to final dimensions.
- Figure 1 Mold with introduced contact piece contour.
- Figure 2 mold with introduced webs.
- Figure 3 mold used standing.
- Figure 4 two-part mold.
- the mold 1 shows the mold 1 with the introduced contour 2, which should have the contact piece after the casting process as an outer contour.
- a survey 3 and there are webs 4 are arranged in the mold, which after a casting a hole and the desired slots in the cast Insert contact piece.
- the mold 1 can be performed cooled from the outside.
- the cooling rate of the melt is further increased.
- the contact piece After the casting process, the contact piece knows the outer contour as well as the webs. The webs may be designed so that they protrude through the contact piece.
- FIG. 3 shows a mold 2, which is arranged vertically (or at an angle) standing.
- the contact piece after the casting process (pouring of the melt through an opening 5) receives its outer contour.
- a survey 4 can be arranged next to webs 3. After a casting process to get a hole and the desired slots in the contact piece.
- the cooling rate can be further increased. Shown is a centrally divided mold, which may also be cooled from the outside. Due to the good heat conduction (short web lengths to Kokilleninnenwand) and the introduced elevation 4 and the webs 3, the cooling rate of the melt is further increased.
- FIG. 4 shows the two-part mold 2 in cross-section.
Landscapes
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Manufacture Of Switches (AREA)
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07724414A EP2011135A1 (de) | 2006-04-20 | 2007-04-20 | Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräte |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06008165A EP1848019B1 (de) | 2006-04-20 | 2006-04-20 | Verfahren zur Herstellung eines Kontaktstückes, sowie Kontaktstück für Nieder-, Mittel,- Hochspannungs- und Generatorschaltgeräte |
PCT/EP2007/003477 WO2007121938A1 (de) | 2006-04-20 | 2007-04-20 | Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräte |
EP07724414A EP2011135A1 (de) | 2006-04-20 | 2007-04-20 | Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräte |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2011135A1 true EP2011135A1 (de) | 2009-01-07 |
Family
ID=36968834
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06008165A Active EP1848019B1 (de) | 2006-04-20 | 2006-04-20 | Verfahren zur Herstellung eines Kontaktstückes, sowie Kontaktstück für Nieder-, Mittel,- Hochspannungs- und Generatorschaltgeräte |
EP07724414A Withdrawn EP2011135A1 (de) | 2006-04-20 | 2007-04-20 | Verfahren zur herstellung eines kontaktstückes, sowie kontaktstück für nieder-, mittel-, hochspannungs- und generatorschaltgeräte |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06008165A Active EP1848019B1 (de) | 2006-04-20 | 2006-04-20 | Verfahren zur Herstellung eines Kontaktstückes, sowie Kontaktstück für Nieder-, Mittel,- Hochspannungs- und Generatorschaltgeräte |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1848019B1 (de) |
CN (1) | CN101427334B (de) |
AT (1) | ATE506683T1 (de) |
DE (1) | DE502006009348D1 (de) |
WO (1) | WO2007121938A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3303170A1 (de) | 1983-01-31 | 1984-08-02 | Siemens AG, 1000 Berlin und 8000 München | Verfahren zum herstellen von kupfer-chrom-schmelzlegierungen als kontaktwerkstoff fuer vakuum-leistungsschalter |
EP0203367B1 (de) | 1985-05-06 | 1989-07-12 | Siemens Aktiengesellschaft | Kontaktanordnung für Vakuumschalter |
DE3840192A1 (de) | 1987-12-02 | 1989-06-15 | Calor Emag Elektrizitaets Ag | Schaltkontaktanordnung |
DE19612143B4 (de) | 1996-03-27 | 2005-05-04 | Abb Patent Gmbh | Verfahren zur Herstellung eines Spiralkontaktstückes für eine Vakuumkammer und Vorrichtung zur Durchführung des Verfahrens |
DE19627956A1 (de) * | 1996-07-11 | 1998-01-15 | Abb Patent Gmbh | Verfahren zur Herstellung eines elektrischen Kontaktes für eine Vakuumschaltkammer |
CN1264143A (zh) * | 2000-02-24 | 2000-08-23 | 周武平 | 真空开关铜铬系触头材料的制造方法 |
-
2006
- 2006-04-20 DE DE502006009348T patent/DE502006009348D1/de active Active
- 2006-04-20 EP EP06008165A patent/EP1848019B1/de active Active
- 2006-04-20 AT AT06008165T patent/ATE506683T1/de active
-
2007
- 2007-04-20 CN CN2007800141402A patent/CN101427334B/zh active Active
- 2007-04-20 EP EP07724414A patent/EP2011135A1/de not_active Withdrawn
- 2007-04-20 WO PCT/EP2007/003477 patent/WO2007121938A1/de active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007121938A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1848019B1 (de) | 2011-04-20 |
CN101427334B (zh) | 2012-05-30 |
DE502006009348D1 (de) | 2011-06-01 |
ATE506683T1 (de) | 2011-05-15 |
CN101427334A (zh) | 2009-05-06 |
WO2007121938A1 (de) | 2007-11-01 |
EP1848019A1 (de) | 2007-10-24 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: GENTSCH, DIETMAR |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: H01H 33/66 20060101ALI20131202BHEP Ipc: H01H 1/02 20060101ALI20131202BHEP Ipc: H01H 33/664 20060101AFI20131202BHEP |
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18D | Application deemed to be withdrawn |
Effective date: 20140501 |