Moeller Gmbh

Eckhardt Pridoehl

Frank Berger

Klaus-Jochen Froehlich

Matthias Fenner

A method for determining a remaining service life of switching contacts in an electric switching device. The method includes operating the switching contacts so as to produce structure-borne sound signals, capturing the structure-borne sound signals, performing a Fourier transform on the structure-borne sound signals in a plurality of discrete time windows so as to produce a sonogram, determining a plurality of function values using the sonogram, and evaluating the plurality of function values using an evaluation device. Also a electrical switching device including first and second switching contacts, a sound sensor configured to capture structure-borne sound signals produced by an operation of the first and second switching contacts, and an evaluation device configured to evaluate the first structure-borne signals so as to determine a remaining service life of the first and second switching contacts.

Method for determining the remaining service life of the switch contacts in an electric switching device and electric switching device with an evaluation unit for carrying out said method

Growing community of inventors

Dresden, Germany

Eckhardt Pridoehl