Patent · US Active

Line circuit breaker and magnet yoke for a line circuit breaker

US7893797B2 · kind B2 · utility

0Cited by

6References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Günther Oskar Eckert · Zellingen, DE
Winfried Vierling · Neutraubling, DE
Christoph Weber · Heidenheim, DE

Key dates

Filing date	May 21, 2007
Grant date	Feb 22, 2011
Priority date	—
Expiry date	May 21, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH01H71/2472
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

In line circuit breakers with a combined overcurrent/short-circuit current tripping device, tripping should take place in a well defined manner in the case of an overcurrent and in the case of a short-circuit current. For this purpose, gaps (A, B) need to be set precisely. If the housing is made from a cost-effective housing material such as thermosetting plastic it is subject to shrinkage. As a result, the mentioned gaps may change. An armature (24) is mounted in such a way that it changes its rest rotary position in the event of shrinkage of the housing. A magnet yoke (28) as part of the overcurrent/short-circuit current tripping device is mounted and shaped in such a way that the rotation is compensated for precisely, so that the mentioned gaps do not change despite the shrinkage.

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