Patent · US Active

Installation switching device

US8451076B2 · kind B2 · utility

1Cited by

3References

21Claims

0Family size

Assignee

ABB AG · US

Inventors

Joachim Wendel · Sinsheim, DE
Roland Ritz · Dielheim, DE
Joachim Becker · Schwetzingen, DE

Key dates

Filing date	Jan 19, 2012
Grant date	May 28, 2013
Priority date	—
Expiry date	Jan 19, 2032

Classification

Technology area (CPC H)Electricity
CPC primaryH01H73/045
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A current path in an installation switching device includes first and second contact points, which respectively include first and second levers. The second lever is arranged in an air gap in a magnetic circuit. In case of a short circuit, an electrodynamic force, which leads to rapid opening of the second contact point, can act on the second lever due to interaction of current flow with magnetic flux within the air gap. A switching mechanism acts via a first connecting line on the first lever to open and/or keep open the first contact point. In case of overcurrent tripping, an overcurrent release acts through the switching mechanism and a second connecting line on the switching mechanism to open and keep open the first contact point. In case of short-circuit tripping, the second lever acts via a third connecting line on the switching mechanism to keep the first contact point open.

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