ISI was awarded a contract to upgrade and replace three existing Uninterruptible Power Systems (UPS) at a critical U.S. Air Force Facility in the Continental United States.  The new equipment consisted of one 40kVA, 120/208V, 3-phase UPS, and two 100kVA, 480V, 3-phase UPS systems.  These new UPS have an integral Battery Management System and utilize lithium-ion battery technology.  Teh project required months of planning to schedule outages for the impacted critical areas, and was successfully completed on time.