Interpretation of monitoring data of own electromagnetic radiation HV transformers

The purpose of the analysis of spectra of own electromagnetic radiation (EMR) of the HV transformer (or equipment) is to identify the parameters describing the internal technical condition of equipment. Necessary to investigate the presence of trends of the spectra of electromagnetic radiation, nonstationary and irregularity structure of the process. It should be filtered the radiation from external sources of the overall registered EMR. The natural frequencies of equipment that characterize its resonance properties, can serve as the most reliable diagnostic parameters. The examples of the real spectra of electromagnetic radiation are showed. The principles of selection signals and the possibility of determining the natural frequencies of the component are considered.