Siemens Aktiengesellschaft

Norbert Schuster

Holger Heine

Gerhard Lang

Stefan Schwabe

Luc Philippot

Ludwig Schiel

Markus Spangler

Volker Wenzel

Steffen Noack

Gunther Reichenbach

Thomas Jachmann

Stefan Stamminger

Jens Lüde

Pawel Studencki

A power supply line is divided into a plurality of sections by switching devices each having an associated measurement device that detects a current signal at a measurement point at the respective switching device. The current signal is sampled to form current sample values, and a current measurement variable is determined. Each measurement device forms a delta current value (difference between an instantaneous current and a prior measurement), compares the delta current value with a current threshold value and identifies a jump in current when the delta current value overshoots the threshold. The measurement device, upon identifying a current jump, sends a status message indicating the jump. A fault location device identifies a fault on that section of the power supply line delimited by a switching device that has identified a jump and one that has not identified a jump in current.

Fault identification and location in a power supply line which is fed from one side

A method, an arrangement, and a current measurement device with which a signal that characterizes a fault current in an electrical conductor having at least three conductor ends can be produced in a particularly simple fashion. In particular, a current measurement device is provided for measuring a current in a conductor. The current measurement device includes at least one measurement value input and at least one measurement value output, and has an arithmetic unit that adds a current measurement value corresponding to the current to a measurement value present at the at least one measurement value input. A resulting summation current measurement value is output at the at least one measurement value output.

Arrangement, method, and current measurement device for measuring a current in a conductor

Current differential protection arrangement

Measuring process for obtaining a switching command in a rapid

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Leer, Germany

Norbert Schuster