Patent · US Expired

Protective device against fault currents

US6747856B1 · kind B1 · utility

5Cited by

3References

2Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Markus Huber · Wagrain, AT
Gerald J. Lehner · Obertraubling, DE

Key dates

Filing date	Feb 5, 2002
Grant date	Jun 8, 2004
Priority date	—
Expiry date	Feb 25, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/33
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A device is for protecting against fault currents, even with frequencies of fault currents higher than 1 kHz. Additionally, it is for protecting against fires to dependably protect people. The converting core of a total current converter mounted upstream of a triggering arrangement, in a releasing circuit, is designed for detecting fault currents of different types. Further, an RC circuit is mounted parallel to the triggering arrangement, on the input side.

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