[i] Factors to Consider When Choosing a Standby, Line-Interactive, or Double-Conversion Design (and New High-Efficiency, Multi-Mode Capabilities) for Your Data Center. By Chris Loeffler, Data Center Applications Manager, Distributed Power Solutions, Eaton[/i] Abstract Previously, data center administrators and equipment managers could choose from three UPS topologies: standby, line-interactive, and double-conversion—which differed significantly in efficiency, performance, and protection levels. The latest generation of double-conversion UPSs features unique multi-mode capabilities, operating in a high-efficiency mode unless power conditions justify switching to a higher protection level, typical of double-conversion mode. This white paper explains how various UPS topologies work and examines the impact of operating modes on five key factors affecting UPS performance: ● Maintaining voltage within permissible ranges ● Switching between modes without locking up IT equipment ● Smooth transitions to generator power ● Reliability and effectiveness ● Energy efficiency Download the "How to Choose the Right UPS for You?" white paper