The Liebert GXT3 is a compact, online uninterruptible power system (UPS) that continuously conditions & regulates its output voltage. The Liebert GXT3 is designed to supply microcomputers & other sensitive electronic equipment with clean sine wave input power. Upon generation, AC power is clean & stable. However, during transmission & distribution it is subject to voltage sags, spikes & complete failure that may interrupt computer operations, cause data loss & damage equipment. The Liebert GXT3 protects equipment from these disturbances. The Liebert GXT3 continuously charges its batteries from the mains, enabling it to supply power to connected loads, even when the mains fail. This section describes the UPS, its features, models, appearance & components, operating principles & operating mode.