Аннотация:At present, quite a number of acoustic signals precursors of a breakdown of high-voltage power equipment isolation, are accumulated. It is possible to classify these signals, using mathematical methods based on signal form recognition. Software, that allows to classify acoustic signals of single partial electric discharges, sounds of single spark discharges, sounds of many discharges and sounds of vibroimpact mechanical processes, is created. On the basis of the software it is possible to create automatic devices for power equipment monitoring.