UPS · Uninterruptible Power Supply
System (battery or flywheel backed) that maintains clean power through grid disturbances and bridges to generators.
Power system that keeps IT load energized through grid sags and outages until backup generation starts.
Also written as: Uninterruptible Power Supply
Current numbers
OEM/test-specific transientloss-of-cooling thermal-trip window for 1 kW+ GPUs — UPS-backed pumps + N+1/2N rejection mandatory
45%of impactful data-center outages root-caused to power (most often UPS); IT/networking ~23%
~99.999%Google fleet-wide CDU availability since 2020 (redundant pump+HX, UPS-backed)