A UPS (Uninterruptible Power Supply) provides near-instantaneous backup power to critical loads during utility disturbances or outages, bridging the seconds-to-minutes gap until generators start and stabilize. Drawing on stored energy in batteries or flywheels, it also conditions power against sags, surges and noise, and is a cornerstone of data-center electrical resilience.
Category: Power Infrastructure · Subcategory: UPS & Energy Storage · Part of the AIDC Technical Terminology reference.