PROCEDURE FOR THE DETERMINATION OF THE REMAINING SERVICE REMAINING IN SWITCHING CONTACTS IN A SWITCHING ELECTRICAL DEVICE AND A SWITCHING ELECTRICAL DEVICE WITH AN EVALUATION DEVICE FOR PERFORMING THE PROCEDURE.

摘要

Procedure for determining the remaining service life of the switching contacts of an electrical switching device, especially low voltage switching device, characterized in that - the sound signals propagated by solid structures generated by the switching process are captured, - the sound signals propagated by solid structures captured for sonogram capture are subjected to a Fourier transformation in different time windows, and - the values of individual functions captured from the sonogram are determined and evaluated by means of an evaluation device.