Uninterruptible Power Supply (UPS) is an electrical device for an emergency power supply to critical loads that provides power automatically, without delay or transients, continuous uninterruptible service. (e.g., batteries)
Reference Definition by Aiche.org: Uninterruptible Power Supply (UPS) is a power supply that employs automatic switching of main power supply from primary to secondary (usually battery and/or diesel generator) upon failure of the primary. A means of providing uninterrupted power to critical instrumentation for a limited period of time even in the event of a plant power failure. Usually accomplished by an inverter, transfer switch and batteries. Alternatives means may include motor generators. A type of power supply that can provide electrical power even when line power is lost. An inverter (AC from DC batteries) which provides a bumpless transition of power to the process control system in the event of plant power failure. The UPS will supply for a limited period (e.g., 15 minutes).
Related Definitions in the Project: The Electrical Engineering; Energy Definitions
