Tripp Lite’s Hot-swap PDU systems enable live-replacement of standard UPS systems for maintenance with no interruption of connected server or, networking loads. Dual input power cables support PDU connection to separate Utility & UPS power sources. Manual transfer switch with lighted status indicators controls the source of power to connected equipment between Utility & UPS. Set the switch to UPS during normal operation & connected equipment will receive full-time conditioned power from the UPS. Set the switch to Utility to momentarily power connected equipment from the Utility line cord & bypass the UPS while the UPS system is removed & replaced with a fresh one. Once the new UPS is up & running with all data & electrical connections restored, set the switch back to the UPS setting to once again provide fully-conditioned UPS power to connected equipment.