The demand for more power in the computer cabinet has led many data centers to upgrade to three phase power distribution. Proper three phase power distribution has traditionally meant dividing power into multiple branches within the rack PDU (Power Distribution Unit). In this paper Server Technology explores the advantages of a new, less common approach to PDU design by means of alternating each phase on a per-receptacle basis instead of a per branch basis.

To read Server Technology’s full document on alternating phase outlet technology, click here.

Three-phase power distribution at the rack level traditionally meant that power was divided into separate branches. Load balancing and cabling of these older PDU designs can be difficult. Power distribution
units implementing alternating phased power on a per-receptacle basis provide tangible benefits in the form of simplified cabling, better airflow, better load balancing and greater efficiencies, thus lowering the
operational expenses of the datacenter.