An uninterruptible power supply (UPS) is a device that provides backup power during a power outage, preventing equipment from shutting down abruptly. It typically consists of a battery that is constantly charged and ready to supply power when the mains power fails. 

Key Features and Specifications:

• Online vs. Line-Interactive:

  UPS systems can be categorized into online (or double-conversion) and line-interactive. Online UPS provide continuous power from the battery, offering the highest protection against power loss and fluctuations. Line-interactive UPS correct minor power fluctuations without switching to battery backup, suitable for non-critical equipment.