Branch Circuit Requirements - HP StorageWorks XP128 Installation Manual

Branch circuit requirements

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When the supplied line to line voltage is in the 380 to 415-volt range, the
connection must be a five-wire WYE or STAR connection.
To protect your disk array, your building must be wired correctly. Each
supply ("hot") conductor should be protected by a short-circuit protective
device and by an overcurrent protective device. The current specifications
for the overcurrent protective devices required for three-phase operation are
listed in the table on
The protective device must comply with national standards of the country
where the units are to be installed. If a protective device interrupts a supply
conductor, it must also interrupt all other supply conductors.
Overcurrent protection is not required for the neutral conductor.
page 36.
HP StorageWorks Disk Array XP128: Site Preparation Guide