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Power Supply Unit. Desktop computers have a power supply unit located within the system unit that plugs into a standard wall outlet, converting AC to DC, which becomes the power to drive all of the system unit components.
Power system measurement, synchronized on a global basis, is moving from the lab to the. utility. What makes this possible is the Phasor Measurement Unit (PMU) â a device which, by. employing widely used satellite technology, offers new opportunities in power system. monitoring, protection, analysis and control. ABB is presently involved in developing a PMU.