9 Apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current, and components thereof; electrical apparatus, namely, transformers, lighting ballasts, reactors, chokes, magnetic coils, and voltage regulators; electric components in the nature of harmonic filters; electrical, electromechanical and electronic components, apparatus, and systems, namely, self-inducting coils, filter chokes, RFI filters, aerials, standard and specific heat sinks for use in computers, capacitors, section filters for ensuring electromagnetic measurement of switched mode power supplies and other data transmissions, section transformers, pulse transformers for data transmissions; transmitters and receivers for electromagnetic apparatus; measuring apparatus, namely, clamp meters for measuring electricity; apparatus for simulating and analyzing electromagnetic disturbances; analyzers for checking the electromagnetic resistance of electronic apparatus subjected to electrostatic discharges, voltage surges and high-frequency disturbances; simulators for radio frequency interference and high frequency disturbances; testing systems comprised of the above specified components for switched-mode power supplies; software for entering, processing and publishing the measurements and results obtained by the above apparatus; overvoltage and high-frequency disturbance protection controllers, surge voltage generators, testing apparatus and installations for transformers, cables, electric emulators, electric and electronic power components; converters, namely, dc to dc converters