Electric measuring assembly and a method for continuously monitoring a protective-conductor resistance

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United States of America Patent

PATENT NO 11500032
SERIAL NO

17470536

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Abstract

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An electric measuring assembly and a method for continuously monitoring a protective-conductor resistance of a protective-conductor connection in a power supply system having a supply station, a supply line, and an electric installation, grounded via the connection. A signal generator generates a signal alternating voltage having a measuring frequency; a first transformer encircles the connection and a first winding inductively couples the voltage into the connection so a loop current flows via first and second leakage capacitors, the active conductors, and the connection, and a second winding for the second measurement of a protective-conductor voltage; a second transformer encircles the connection and has a secondary winding capturing a protective-conductor current flowing in the connection; an evaluation unit determines a loop impedance from the protective-conductor voltage and the protective-conductor current for evaluating the real part of the loop impedance.

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Patent Owner(s)

  • DIPL.-ING. W. BENDER GMBH & CO. KG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Broeckmann, Eckhard Giessen, DE 11 31
Hackl, Dieter Fernwald, DE 38 102

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