Patent · US Active

Protective switching device for monitoring the electrical current flow to an electrical user and method for monitoring the electrical current flow to an electrical user by way of a protective switching device

US8385037B2 · kind B2 · utility

0Cited by

7References

20Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Dirk Graupner · Meerane, DE
Reinhard Schmid · Regensburg, DE

Key dates

Filing date	Jan 28, 2009
Grant date	Feb 26, 2013
Priority date	—
Expiry date	Oct 8, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/0935
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A protective switching device is disclosed for monitoring the electrical current flow to an electrical user, including a switching functionality, an excess current triggering functionality and a short circuit triggering functionality. In at least one embodiment, the protective switching device includes a first microcontroller with a first input signal filter, wherein the first microcontroller is configured for monitoring the excess current triggering functionality and wherein a second microcontroller is provided with a second input signal filter that is configured for monitoring the short circuit triggering functionality, wherein the two input signal filters are designed differently, and wherein the switching functionality is provided in one of the two microcontrollers. A method is further disclosed for monitoring the electrical current flow to an electrical user by way of a protective switching device.

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