MUMBAI, India, Sept. 7 -- Intellectual Property India has published a patent application (202617082050 A) filed by Hella Gmbh & Co. Kgaa on July 03, 2026, for Protective Earth Monitoring System And Method.
Inventor includes Brown, Alan Wayne.
The application for the patent was published on September 04, 2026, under issue no. 36/2026.
Abstract: A method for monitoring the line impedance of a protective earth ("PE") conductor is provided. The method injects a small stimulus current at a frequency much higher than the grid frequency. The stimulus current circulates in the loops between a grid-connected device and a grid source, creating small voltage drops in the grid conductors, resulting in a common mode voltage which can be measured. The method then includes measuring the common mode voltage and the residual current at a point of common coupling ("PCC"). The method then includes monitoring the resistive and reactive parts of the line impedance. For example, the method can monitor the line impedance and report a broken PE conductor or a high PE resistance, beyond a given threshold where safety becomes a concern.
Disclaimer: Curated by HT Syndication.
