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We outline the specifications and performance of a 400-Vdc distribution system and 400-Vdc output rectifier prototypes. In 2008, The NTT-group began developing a 400-Vdc distribution system for reducing power consumption and the usage of materials, such as copper in power cables. In conjunction with this project, NTT Facilities developed prototype rectifiers, a prototype voltage compensator used during...
In this paper, we describe 400-Vdc power distribution systems to be used as an energy conservation technology at telecom sites and data centers. We compared the 48-Vdc power distribution systems used at telecom sites with the AC power distribution systems used at data centers, and examined the advantages of DC. However, because of advances in the information and communication services, the 48Vdc system...
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