EP 0736216 B1 19970903 - SILVER-BASED CONTACT MATERIAL FOR SWITCHGEARS USED IN POWER ENGINEERING
Title (en)
SILVER-BASED CONTACT MATERIAL FOR SWITCHGEARS USED IN POWER ENGINEERING
Title (de)
KONTAKTWERKSTOFF AUF SILBERBASIS ZUR VERWENDUNG IN SCHALTGERÄTEN DER ENERGIETECHNIK
Title (fr)
MATERIAU DE CONTACT A BASE D'ARGENT POUR APPAREILS DE COMMUTATION UTILISES EN GENIE EN MATIERE D'ENERGIE
Publication
Application
Priority
- DE 9401488 W 19941214
- DE 4343550 A 19931220
Abstract (en)
[origin: US5663500A] PCT No. PCT/DE94/01488 Sec. 371 Date Jun. 20, 1996 Sec. 102(e) Date Jun. 20, 1996 PCT Filed Dec. 14, 1994 PCT Pub. No. WO95/17758 PCT Pub. Date Jun. 29, 1995Substitute materials are increasingly proposed for contact pieces in low-voltage switches, which until now frequently consisted of silver-nickel. In the case of such a substitute material which, besides silver, contains at least iron oxide (Fe2O3/Fe3O4) and zirconium oxide (ZrO2) as active components, the making capacity with regard to the critical welding current is improved by an addition of a further oxide of the sixth subgroup of the Periodic System and/or of a mixed oxide that consists of iron oxide and the oxide of an element of the sixth subgroup of the Periodic System. In this connection, the further additive is, in particular, ferro-wolframate (FeWO4).
IPC 1-7
IPC 8 full level
H01H 1/02 (2006.01); H01H 1/0237 (2006.01)
CPC (source: EP US)
H01H 1/0237 (2013.01 - EP US); H01H 2001/02378 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR LI
DOCDB simple family (publication)
US 5663500 A 19970902; DE 4343550 A1 19950622; DE 59403995 D1 19971009; EP 0736216 A1 19961009; EP 0736216 B1 19970903; WO 9517758 A1 19950629
DOCDB simple family (application)
US 66946396 A 19960620; DE 4343550 A 19931220; DE 59403995 T 19941214; DE 9401488 W 19941214; EP 95902764 A 19941214