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A large data-center-scale UPS being installed by electricians. An uninterruptible power supply (UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.
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Most forms of uninterruptible power supply (UPS) can be either powered by battery or flywheel energy. These are ready for immediate use at the instant that the mains electricity fails, but the relatively small and finite amount of stored energy they contain makes them suitable for short periods of use, typically in the order of a few dozen minutes to a couple of hours depending on the actual load.
CPAP is the most effective treatment for moderate to severe obstructive sleep apnea, in which the mild pressure from the CPAP prevents the airway from collapsing or becoming blocked. [ 1 ] [ 2 ] CPAP has been shown to be 100% effective at eliminating obstructive sleep apneas in the majority of people who use the therapy according to the ...
Colin Sullivan AO FAA is an Australian physician, professor, [1] and inventor known for his invention of the nasal continuous positive airway pressure (CPAP) machine for the treatment of sleep apnea. Sullivan began studying sleep apnea in the late 1970s. In 1981 he published a design for the first CPAP machine in The Lancet.
If the device is designed to provide backup power, it may be called an uninterruptible power supply. A circuit may be designed with a voltage multiplier topology to directly step-up AC power; formerly, such an application was a vacuum tube AC/DC receiver. In modern use, AC power supplies can be divided into single phase and three phase systems ...