Patent · US Expired

Sintered composite material as contact material for medium-voltage vacuum power circuit breakers

US4147909A · kind A · utility

4Cited by

11References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Heinrich Hassler · Wendelstein, DE
Horst Kippenberg

Key dates

Filing date	Apr 13, 1977
Grant date	Apr 3, 1979
Priority date	—
Expiry date	Apr 13, 1997

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C29/06
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a sintered composite material as the contact material for medium-voltage vacuum power circuit breakers, particularly in the switching voltage range from 7.2 kV to 36 kV. The contact material is comprised of a sintered composite of a burn-off-resistant metal component such as iron, cobalt, chromium, nickel, zirconium or alloys or mixtures of these metals, and a component which lowers the breaking current. As the breaking current-lowering component are provided metals, compounds or alloys of metals having a boiling point above 2400.degree. C. such as, for example, tin, chromium carbide (Cr.sub.3 C.sub.2) or copper zirconide (ZrCu.sub.4, ZrCu.sub.3).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.