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AC vs DC Power Distribution for Data Centers
from APC by Schneider Electric

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Description:
DC power distribution has been proposed as an alternative to AC power distribution in data centers, but misinformation and conflicting claims have confused the discussion. A detailed analysis and model show that many of the benefits commonly stated for DC distribution are unfounded or exaggerated. This paper explains why high efficiency AC will likely emerge as the dominant choice for data center power distribution.

AC vs DC Power Distribution for Data Centers

Many data center and network room operators appreciate and respect the high availability demonstrated by telephone system central offices, which have historically exhibited much higher availability than network rooms and data centers. Naturally there is a desire to duplicate this level of availability in commercial networks. This has led to the assumption that practices such as the use of DC have contributed to telephone system availability and should be copied. This assumption is examined in this paper.

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