HP 3PAR T-Class Installation and Deinstallation Guide

HP 3PAR cabinets contain four power distribution units (PDU). Each PDU requires service from a
dedicated single-phase 200-240 VAC 30-A grounded electrical circuit. HP recommends a redundant
AC configuration using independent sources to provide a dedicated, grounded electrical circuit
to each PDU.
NOTE: If a storage system cabinet does not have components installed in the top four bays (bays
0–3, or the highest 16U of the cabinet), the two upper PDUs (PDU 0 and PDU 1) are not used to
power the system and does not need to be connected. Redundant power is still supplied to the
lower bays in the cabinet through PDU 2 and PDU 3.
The storage system PDUs are equipped with NEMA® L6-30 or IEC 60309 receptacle connectors,
depending on the region. The appropriate receptacles are necessary at the operating site to
accommodate these connectors.
Supporting Redundant Power
The use of redundant PDUs and power supplies creates power redundancy for storage systems
inside 3PAR cabinets.
As shown in Figure 7 (page 17) and Figure 8 (page 18), power domains within the storage system
are distributed between the upper and lower halves of the cabinet.
Figure 7 Front View of the Power Domains Within the Controller Nodes and Drive Chassis
Supporting Redundant Power 17