Controlling, measuring, testing and inspecting equipment and apparatus for use in regulating the performance and efficiency of high power engineering equipment in the nature of high power electrical applications to reduce distortion and provide power factor correction for users of electrical power, low power engineering equipment in the nature of low power electrical applications to reduce distortion and provide power factor correction for users of electrical power; electric power converters; rectifiers; inverters; converters; direct current-to-direct current converters; electrical energy accumulators; installations and equipment in the nature of electricity distribution consoles for distributing electricity, and downloadable computer software for conducting, distributing, switching, transforming, accumulating, influencing or controlling electricity; installations and equipment, namely, AC/DC converters, DC/DC modules, power conversion and inversion systems, energy accumulators, active filters, and transformers, for the purpose of regulating power supply systems, power grids, solar modules, transformers and converters; installations and equipment in the nature of voltage monitor modules for guaranteeing and improving the voltage quality of public, private and industrial power supply systems and power grids, and downloadable computer software for voltage regulators for the purpose of guaranteeing and improving the voltage quality of public, private and industrial power supply systems and power grids; installations and equipment in the nature of power factor regulator for reactive power factor compensation using coils and capacitors and for uninterruptible power supply and downloadable computer software for regulating reactive power factor compensation using coils and capacitors and for uninterruptible power supply; electric filters for the suppression of electrical noise and radiation and electronic filters, passive and active electronic filters, electronic network filters, electronic harmonic filters, electronic power factor correction filters