Patent · US Active

Method and device for short-circuit monitoring of a three-phase load

US11009557B2 · kind B2 · utility

1Cited by

1References

18Claims

0Family size

Assignee

PHOENIX CONTACT GMBH & CO. KG · DE

Inventors

Elmar Schaper · Lügde, DE
Daniel Hawel · Detmold, DE
Detlev Schuergens · Blomberg, DE

Key dates

Filing date	Jan 13, 2017
Grant date	May 18, 2021
Priority date	—
Expiry date	Jun 23, 2037

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/50
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and device for short circuit monitoring of a three-phase load connected to a three-phase grid, to improve short circuit monitoring of a three-phase load, the device having at least one current sensor arranged in the current path of one phase of the three-phase grid, and a processing unit for evaluating the measurement values of the at least one current sensor, having a respective port for each current sensor, to which the respective current sensor is connected via a connecting line. The processing unit is configured to detect a short circuit on the three-phase load through evaluation of the measurement values determined by the current sensor. The evaluation includes a plausibility check of the determined measurement values in order to distinguish between a short circuit and an influence on the determined measurement values by electrical and/or electromagnetic interference.

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