Patent · US Active

Thermomagnetic trip for small current ranges

US9218929B2 · kind B2 · utility

1Cited by

9References

12Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Stephan Lehmann · Hahnbach, DE
Michael Poles · Radevormwald, DE

Key dates

Filing date	Dec 13, 2012
Grant date	Dec 22, 2015
Priority date	—
Expiry date	Feb 22, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH01H71/402
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A thermomagnetic trip is disclosed for an electrical switching device, especially a circuit breaker. In at least one embodiment it includes at least one first and one second terminal, a first heating element, a conductor able to be influenced by temperature, a yoke and a clapper armature. A current path is formed through at least the first terminal, the conductor, the first heating element and the second terminal. The current path is disposed at least in sections on and/or in the yoke such that a magnetic field acting on the clapper armature is induced in the yoke by the current flowing through the current path and wherein a second heating element is disposed in the current path especially between the first terminal and the conductor.

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