HP StorageWorks XP24000 Disk Array Site Preparation Guide, v01 (AE131-96002, June 2007)

Figure 11 30-amp, three-phase power cords
If one power source malfunctions, the other power source assumes the total load, providing
uninterrupted operation. HP recommends that each power cord have a separate electrical circuit as
its source, in case of a circuit failure. Each power-supply cord is supplied with an attachment plug
type Russellstoll 3760PDG.
Be sure to install Russellstoll 3934 (alternate, 9C34U0) or 3754 (alternate, 39R34U0W) socket
receptacles between the power distribution panel of the building and the power plugs for the unit.
The power cords provided with the disk array are nonshielded, type ST or equivalent with four #8
AWG (minimum) conductors terminated at one end with an assembled plug connector.
Three-phase AC USA branch circuit requirements
To protect the disk array, your building must be wired correctly. Each supply (“hot”) conductor must
be protected by a short-circuit protective device and by an overcurrent protective device. The tables
listed under “AC line voltage requirements” on page 47 provide specifications for the overcurrent
protective devices required for three-phase operation.
All protective devices must comply with national standards of the country where the units are to be
installed. If a protective device interrupts any supply conductor, it must also interrupt all other supply
conductors.
Overcurrent protection is not required for the neutral conductor of this unit. Only 50 Hz, three-phase
configurations have a neutral conductor.
Three-phase AC cabling for Europe (50 Hz)
Each three-phase DKU has two main disconnect devices (two main breakers for dual power lines) so
AC power can be supplied from separate power distribution panels with two power-supply cords.
CAUTION:
An HP representative should be present whenever the disk array is being connected to a new power source
for the first time.
Electrical specifications for the HP XP24000 Disk Array54