Patent · US Active

Method and apparatus for evaluating rapid changes in current

US7834614B2 · kind B2 · utility

0Cited by

9References

15Claims

0Family size

Assignee

Ellenberger & Poensgen GmbH

Inventors

Michael Naumann · Feucht, DE
Markus Miklis · Schwarzenbruck, DE

Key dates

Filing date	Sep 18, 2009
Grant date	Nov 16, 2010
Priority date	—
Expiry date	Sep 18, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG01R19/12
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In order to detect and evaluate changes in current as a result of electric arcs, a sensor signal, differentiated on the basis of time, is produced with a sensor-dependent frequency bandwidth whose upper cutoff frequency is 40 MHz and whose lower cutoff frequency is 100 kHz. The sensor signal is taken and an evaluation signal is produced with an upper cutoff frequency of less than or equal to 10 MHz. The evaluation signal is compared with a threshold value and a normalized signal is produced, and a pulse duration of the signal is extended to a prescribed time value.

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