VERFAHREN ZUR ERFASSUNG VON BEWEGUNGSABLAEUFEN BEI KONTAKTEN IN GESCHLOSSENEN SCHALTERGEHAEUSEN

摘要

During the movement of the contact in the monitored, metal-clad high voltage switchgear are generated noises characteristic for the different switching phases. These noises are detected and fed an evaluation and indication apparatus. This enables an association of a noise to a corresponding switching phase, and the movement course of the contact is also discernible. Sonic measuring apparatus and analysers are used as evaluation and indication instruments in such manner that the time course of the sonic amplitude and/or the monitoring of a frequency spectrum are also used. Frequency filters may be used for the sonic spectrum analysis. Thus spectrum may be also visible on a multi-beam oscillograph.