Abstract: A system includes a power transformer diagnosis and prognosis device having memory circuitry storing a plurality of models. Each of the plurality of models comprises correlations between potential combinations of operational and non-operational power transformer data and potential conditions of one or more subsystems of a power transformer and include a physics-based model and an empirical model. The system includes communication circuitry configured to receive a particular combination of operational and non-operational power transformer data related the power transformer.

Abstract: Electro-acoustic device, which installed in flat-top panels, partitions or facings existing in the market, be they of mineral fibre, plasterboard, plywood, etc., transforms them into planar and invisible radiators of high fidelity sound and spherical dispersion. Through its particular property of being equalisable for each type of panel by means of an electronic equaliser and by having the necessary means to avoid any resonance.

Abstract: Featured are methods for regulating the AC frequency of the electrical power be supplied on an electrical distribution system or grid. Such a method includes electrically coupling an energy storage sub-system to the electrical distribution network, where the energy storage sub-system includes one or more flywheel energy storage systems. Also featured as devices, systems and apparatuses embodying such methodologies or for use in implementing such methodologies of the present invention.