ABSTRACT
Non-disassembly diagnostics of mechanical and electrical parts of HV rotating and non-rotating electrical machines (generators, motors, transformers, etc.) date back to the 1930s in connection with the mass production and use of electricity. The task of diagnostics of large HV electrical machines is not only to find out their technical condition but also to estimate their time of trouble-free operation. In addition to the diagnosis itself, each successful diagnostic also works with a prognosis, i.e., determination of the future development of the technical condition of the object and genesis, i.e., sufficient knowledge of the “history” of the monitored object. Monitoring the intensity of failures is essential to plan machine repairs and eliminate their accidents. Because unplanned machine downtime is very costly, these machines must be diagnosed regularly and the results obtained are used to identify the type and extent of faults. This can effectively prevent significant economic losses during downtime.
