Liebert PSI 1500VA is a compact, line-interactive UPS system designed especially for IT applications such as network closets and small data centers. The flexible design of Liebert PSI allows the UPS to be configured as a self-standing tower or to be rack-mounted within a 2U space. It provides reliable power protection for servers, critical nodes, network workstations, large network peripherals, network routers, bridges, and other electronic equipment.