Continual power system

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A continual power system is a large-scale system for reliably supplying large amounts of uninterrupted power. It has some features of an uninterruptible power supply and others of an emergency power system.

An example of a continual power system is the flywheel-based type common on colocation sites. These consist of an electric motor, a flywheel, a generator and a diesel engine. In normal oparation, the eletrci motor, supplied from the grid, turns the flywhell which in turn turns the generator. In the event of power failure, the flywheel keeps the generator turning while the diesel engine starts.