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Abstmct-Reliable AC back-up fed by the 48Vdc battery source are in a continuous evolution. The market's need drove us hard t o develop a new topology of DC/DC converter integrated in a full digital control inverter. This new technical approach has been implemented over a telecom inverter range. It has been done at first on a 2U'/lkVA unit and a 1U'/3OOVA unit both naturally cooled as well as a

CE+T presents a "Revolutionary Power Concept" based on a range of modular static converters that overcomes the limitations of standard UPS' and improves the DC/AC inverter systems solutions fitted with static by pass switch.This concept is a world premiere ! It allows for the first time to build AC power systems by removing any possible "Single Point of Failure" with high efficiency and full scalability. Based on one single multifunctional module it leads to parallel architectures truly redundant to cover the latest power systems requirements for ICT and industry in IT Age.A comparison with conventional UPS' and DC/AC inverter systems including a static by pass switch will be conducted by taking into account power density, efficiency, overload and short-circuit current capacity, modularity, redundancy, distortion, power factor...

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