Uninterruptible Power Supply (UPS)
A battery-powered system that provides immediate backup power during brief power interruptions.
Full Definition
An Uninterruptible Power Supply (UPS) is a battery-powered system that provides immediate backup power during brief power interruptions or voltage fluctuations. Unlike generators, UPS systems provide instant power with no interruption, making them essential for protecting sensitive electronic equipment like computers, servers, and building automation controllers. UPS systems are rated by capacity (VA or watts) and runtime duration, and they require regular battery maintenance and replacement. They are commonly used for critical systems that cannot tolerate even brief power interruptions.
Related Terms
Emergency Power System
A backup power system that provides electricity during utility outages to maintain critical building operations.
Backup Generator
A standby power generator that automatically starts during utility outages to provide electricity to critical building systems.
Electrical System
The integrated network of electrical distribution equipment, circuits, and controls that deliver power throughout a building.