Patent · US Active

Method and measuring device for detecting a leakage current in an ungrounded, single-phase alternating-current power supply system

US11719759B2 · kind B2 · utility

0Cited by

1References

7Claims

0Family size

Assignee

Bender GmbH & Co. KG · DE

Inventors

Julian Reitz · Sankt Wendel, DE
Eckhard Broeckmann · Gießen, DE
Dieter Hackl · Albach, DE
Karl Schepp · Kreuztal, DE

Key dates

Filing date	May 5, 2022
Grant date	Aug 8, 2023
Priority date	—
Expiry date	May 5, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG01R31/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method and a measuring device for detecting a leakage current in an ungrounded, single-phase alternating-current power supply system. A variable test resistance is switched between one of the outer conductors and ground and starting from a minimally admissible test-resistance value, at least one of three support test-resistance values is determined as support locations. In an equivalent circuit of the modeled alternating-current power supply system, an equations system is set up for describing the dependency of currents and voltages. An extrapolation on the test-resistance value zero leads to a calculated test current which corresponds to the leakage current to be detected. Consequently, a ground fault situation may be simulated without actually causing a dangerous ground fault.

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