Patent · US Active

Method for controlling an electronic overcurrent trip for low-voltage circuit breakers

US7724488B2 · kind B2 · utility

2Cited by

9References

19Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Andreas Krauss · Lörrach, DE
Klaus Neidhardt · Murrhardt, DE
Andreas Pancke · Berlin, DE
Ilka Redmann · Falkensee, DE

Key dates

Filing date	Aug 24, 2004
Grant date	May 25, 2010
Priority date	—
Expiry date	Sep 9, 2027

Classification

Technology area (CPC H)Electricity
CPC primaryH02H3/08
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method is disclosed for controlling an electronic overcurrent trip for low-voltage circuit breakers. According to the method, digitized signals for the electricity values are generated and evaluated, and a tripping device providing short-circuit protection is activated when an overcurrent event is assumed to take place based on the evaluation. According to the method, signals whose electricity value does not lie between the electricity values of the previous signal and the subsequent signal, or whose electricity value does not correspond to the electricity values of the previous signal or the subsequent signal, are rated as potentially erroneous signals and are tested by use of additional criteria.

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