Bender Gmbh & Co Kg

Ellenberger & Poensgen Gmbh

Harald Sellner

Wolfgang Hofheinz

Dieter Hackl

Winfried Moell

Michael Kammer

Christian Strobl

Winfried Möll

Waldemar Weber

Matthias Oehler

Oliver Schäfer

Bernd Häuslein

Timm Decker

Jürgen Zeberl

Markus Wiersch

The invention relates to a method and to an electrical protection device for detecting a disconnection of a protective conductor connection with a subsystem in ungrounded and grounded power supply systems and in a grounded power supply system comprising a converter system. The invention is based on the idea that the disconnection of the protective conductor connection with a subsystem will reduce the sum of the network leakage capacitances of the power supply system by the value of the network leakage capacitance of the subsystem. The necessary distinction between a subsystem in operation having a disconnected protective conductor connection and a shut-off subsystem is made by evaluating the current total power consumed via the power supply system. In the case of a converter system connected to the subsystem, the protective conductor disconnection is detected by examining the leakage current spectra that are characteristic of the converter system.

Methods and devices for detecting a disconnection of a protective conductor connection

A monitoring device and a method safeguards the function of a type A residual current device (RCD) in a power supply system. The monitoring device includes a measuring current transformer circuit for detecting a DC fault current (I), an evaluation unit for processing the current detected by the measuring current transformer circuit, and a communication interface connected to the output of evaluation unit. In one embodiment, the monitoring device forms part of an electrical protection device with a type A residual current device (RCD) for ensuring the function of the type A residual current device (RCD).

Electrical monitoring device and method for safeguarding the protective function of a type A residual current device (RCD)

The invention relates to a method and an electrical protection and monitoring device with an insulation monitoring instrument and a differential current monitoring instrument in an electric vehicle for safe driving operation and also for safe charging and energy recovery operation of the electric vehicle at a charging station. The invention further relates to a device for the safe charging and energy recovery operation of an electric vehicle at a charging station with electrical protection and monitoring devices.

Devices and methods for the safe driving, charging and energy recovery operation of an electric vehicle

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Gruenberg, Germany

Harald Sellner