EP 0118708 B1 19861230 - SINTERED CONTACT MATERIAL FOR LOW-TENSION SWITCHGEAR
Title (en)
SINTERED CONTACT MATERIAL FOR LOW-TENSION SWITCHGEAR
Publication
Application
Priority
DE 3304637 A 19830210
Abstract (en)
[origin: US4681702A] Electrical contact materials based on AgCdO with CdO as the main active component have proven to be particularly advantageous for low voltage switchgear in the power industry. However, when switching AgCdO contact materials, CdO, which is classified as toxic, can escape into the environment through burn-off. It is important, therefore, to keep the CdO content as low as possible in the contact material, or to exclude it completely. The contact material according to the invention is a sintered contact material consisting of AgSnO2 with at least two other metal oxide additives; namely, Bi2O3, CuO and optionally CdO. Relative to SnO2, these additives Bi2O3, CuO optionally CdO, amount quantitatively to a total maximum of 25 percent by volume of the total amount of oxide.
IPC 1-7
IPC 8 full level
C22C 5/06 (2006.01); C22C 32/00 (2006.01); H01H 1/02 (2006.01); H01H 1/023 (2006.01); H01H 1/0237 (2006.01)
CPC (source: EP US)
C22C 32/0021 (2013.01 - EP US); H01H 1/02376 (2013.01 - EP US); B22F 2009/0828 (2013.01 - EP US); B22F 2998/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
US 4681702 A 19870721; AT E24628 T1 19870115; AT E57789 T1 19901115; DE 3304637 A1 19840816; DE 3461872 D1 19870205; DE 3483479 D1 19901129; EP 0118708 A1 19840919; EP 0118708 B1 19861230; EP 0182386 A2 19860528; EP 0182386 A3 19870114; EP 0182386 B1 19901024; JP H0377265 B2 19911210; JP S59148215 A 19840824
DOCDB simple family (application)
US 86593286 A 19860516; AT 84100927 T 19840130; AT 85114864 T 19840130; DE 3304637 A 19830210; DE 3461872 T 19840130; DE 3483479 T 19840130; EP 84100927 A 19840130; EP 85114864 A 19840130; JP 1981584 A 19840206