Abstract: A method analyses a state of an on-load tap-changer. The on-load tap-changer has at least one vacuum interrupter for switching between winding taps of a transformer. The method includes: capturing real-time data with respect to the on-load tap-changer; determining tap-changer-specific parameters; and determining at least one characteristic value for ascertaining a state index of the on-load tap-changer on the basis of the real-time data and the tap-changer-specific parameters. The state index includes a period of time until a due maintenance, a remaining service life, or a remaining number of switching processes of the on-load tap-changer.

Abstract: A method measures electrical equipment of a system for supplying power. The electrical equipment includes a housing with an insulating fluid. The method includes: recording measurement values representing dissolved gases in the insulating fluid; determining equipment parameters; adapting the measurement values to a uniform evaluation basis using the equipment parameters; assessing a state of the electrical equipment based on the adapted measurement values at least one machine learning method; and outputting the state.