Global Patent Index - EP 0982748 A1

EP 0982748 A1 2000-03-01 - Switch assembly and process for producing same

Title (en)

Switch assembly and process for producing same

Title (de)

Schaltanordnung und Verfahren zu ihrer Herstellung

Title (fr)

Ensemble de commutation et son procédé de fabrication

Publication

EP 0982748 A1 (DE)

Application

EP 99810706 A

Priority

DE 19837945 A

Abstract (en)

[origin: JP2000067679A] PROBLEM TO BE SOLVED: To easily protect a switching device from the arc burning by mounting the plasma sprayed protective layers of the burning resistant material respectively on a point part of a contact tulip body of a first switching member and a point part of a switching pin of a second switching member. SOLUTION: In a switching device 10 comprising a first switching member provided with a contact tulip body 11 and a second switching member comprising a switching pin 14 vertically movable along a slide guide 13, the switching device is on and off by contacting and separating a point of a substrate 18 of the switching pin 14 with respect to a contact finger 25 of a substrate 26 of the contact tulip body 11. The protective layers 27, 29 are respectively formed on the point parts of the substrates 26, 28. This protective layers 27, 29 are formed by plasma spraying of the burning resistant material composed of, for example, about 80% of W and about 20% of Cu. Whereby the contact finger 25 and the point part of the switching pin 14 can be protected from the burning by an arc 17 generated in an arc chamber 16 in the switching-off.

Abstract (de)

Bei einem Leistungsschalter bestehen Leistungsfinger einer Nennstromschaltanordnung sowie Kontaktfinger (25) einer Kontakttulpe und ein Schaltstift (14) einer Abbrandschaltanordnung oder auch andere Teile jeweils aus einem Grundkörper (26, 28), der an Abschnitten, die durch die Lichtbogenbildung thermisch stark belastet werden, eine abbrandresistente Schutzschicht (27, 29) trägt, welche durch Plasmaspritzen unter Vakuum auf den Grundkörper (27, 28) aufgebracht wurde. Dies erlaubt die abbrandresistente Ausbildung auch komplexer und flexibler Teile. Für die Schutzschicht (27, 29) wird vorzugsweise eine Mischung aus mindestens 10%(Gew.), insbesondere mindestens 50%(Gew.) hochschmelzendem Metall wie W, Mo, Ir und niedrigerschmelzendem Metall wie Cu, Ag, Ti, Fe, z. B. 80%(Gew.) W und 20%(Gew.) Cu verwendet, für den Grundkörper Cu, Ag, Fe, Stahl, Al oder eine flexible Kupferlegierung wie CuBe, CuCr oder CuCrZr. <IMAGE>

IPC 1-7 (main, further and additional classification)

H01H 33/91; H01H 33/12; H01H 33/70

IPC 8 full level (invention and additional information)

H01H 1/021 (2006.01); H01H 1/04 (2006.01); H01H 1/06 (2006.01); H01H 1/38 (2006.01); H01H 11/04 (2006.01); H01H 31/02 (2006.01)

CPC (invention and additional information)

H01H 1/021 (2013.01); H01H 11/041 (2013.01); H01H 1/385 (2013.01)

Citation (search report)

Designated contracting state (EPC)

CH DE FR IT LI

EPO simple patent family

DE 19837945 A1 20000224; CN 1132211 C 20031224; CN 1245964 A 20000301; EP 0982748 A1 20000301; EP 0982748 B1 20031105; JP 2000067679 A 20000303; US 6211478 B1 20010403

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