Abstract
The analysis of spectra of intrinsic electromagnetic radiation (EMR) emitted from high-voltage equipment makes it possible to obtain information from which the intensity of discharge processes that occur in the insulation can be determined. The purpose is to identify indicators that characterize the internal technical condition of a component of the equipment. Radiation emitted from external sources should be filtered out from the overall picture of recorded EMR. The spectra of EMR emitted from various units of the equipment are individual ones, but for similar units of the equipment they have similar structure and similar general properties. Examples of actual spectra of EMR are given. The most probable interferences are analyzed. The principles of signal selection are discussed. The special features of interpreting the dependence of amplitudes of natural frequencies of a spectrum on the time are examined. The possibilities for determining natural frequencies of a component of the equipment are shown.
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