Such damage as turn-to-turn short-circuits in turbogenerator rotor winding is one of the difficult revealed types of damage nowadays. Thus protection against interturn insulation of a rotor winding damage in turbogenerators isn't established. Such situation is caused by lack of the reliable and approved methods of obtaining unambiguously treated information about damage fixed by regular measuring devices. The lack of relay protection can be offset by the system of technical diagnostics which, basing on indirect evidence, is able to send the diagnostic signal pointing at the emergence of the turn-to-turn short- circuit in a rotor winding. Materials and Methods: During development of the monitoring system methods, digital processing of signals on the basis of adaptive filtration algorithms and mathematical possibility theory application were used. Results: The creation concept of a turbogenerator rotor winding monitoring system technical condition, on the basis of intellectual methods of information processing capable to reveal short circuit of single turn is developed. Conclusions: Condition monitoring of rotor winding allows not only receiving information about technical condition of the device, in operation process extent of damage development, but also could be used for quality check of a new rotor winding production or a rotor after its repair.