Profile: Alpine Power Systems, Inc. specializes in batteries, recycling, chargers, generators, UPS systems, cooling, monitoring, surge protection, power equipment, safety products, disaster recovery, solar, wind, fuel cells, and lighting. The industries we serve include telecommunications, data centers, material handling, utilities, manufacturing, building management, refineries, and renewable energy. Liebert™ XD cooling modules are available in configurations to suit individual application requirements. The Liebert™ XDO overhead cooling module mounts directly above the cold aisle, requiring no floorspace. It draws in hot air from the hot aisle, then discharges cool air into the cold aisle where the equipment air inlets are located. It is available with smart module integrated control board, for increased module control and monitoring. Liebert™ XDV rack cooling module mounts vertically on or above the IT rack enclosure, requiring no floorspace. It draws hot air from inside the cabinet or from the hot aisle. It then cools the air and discharges it down to the cold aisle. Generac™ closed transition transfer switches (CTTS) eliminate momentary power interruption when both sources are present and synchronized, by transferring the loads with an overlapping contact arrangement. The momentary closed transition switch transfers the power within one hundred milliseconds, which does not require utility protective relaying.