Process for producing a copper-chromium contact element for medium-voltage switchgear assemblies, and contact element itself

(19)

(11)

EP 2 191 921 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.05.2011 Bulletin 2011/18

(43)	Date of publication A2:
	02.06.2010 Bulletin 2010/22

(21)	Application number: 08020271.6

(22)	Date of filing: 21.11.2008

(51)

International Patent Classification (IPC):

B22F 1/00^(2006.01)
C22C 1/04^(2006.01)

B22F 1/02^(2006.01)
H01H 33/66^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
	Designated Extension States:
	AL BA MK RS

(71)	Applicant: ABB Technology AG
	8050 Zürich (CH)

(72)	Inventor:
	Gentsch, Dietmar, Dr.-Ing. 40882 Ratingen (DE)

(74)	Representative: Schmidt, Karl Michael et al
	ABB AG GF-IP Oberhausener Strasse 33 40472 Ratingen 40472 Ratingen (DE)

(54)	Process for producing a copper-chromium contact element for medium-voltage switchgear assemblies, and contact element itself

(57) The invention relates to a process for producing a contact element for medium-voltage switchgear assemblies, and also to the contact element itself, in accordance with the preamble of claims 1 and 6. In order, in this case, to considerably lessen the abrasive effect which occurs during operation when the contact element is finished, and therefore to make the contact element more durable, the invention proposes that the chromium particles in the powder mixture are surface-rounded in advance by ball milling and/or by coating the particles with copper.

Search report