Power Cable Usage Guidelines - Hitachi F400 Hardware Reference Manual

AS-3112

Power cable usage guidelines

Hitachi storage systems are intended for rack installation and ship with power
cords. Installation and service requirements may require additional cords and
cables to be ordered. The type of power cable required by a given installation
is determined primarily by the:
• Type of AC line feed provided by the facility.
• Type of AC source (wall outlet or modular and monitored PDU) to be used.
• Serviceability of components to be connected.
Storage systems require a country-specific power cable for direct connection
to a facility AC feed.
Storage systems are designed to allow replacement of hot-pluggable
components without removing the chassis from the rack. As a result, power
cables can be short because cable movement is of minimal consideration.
Three-phase power considerations for racks
Increasing power requirements for racks are making the use of three-phase
power at the rack level compelling.
• With single-phase power, at any given time the voltage across the hot and
• Three-phase power uses three cycles that are 120 degrees out of phase,
84
Description Receptacle (male end)
neutral conductors can be anywhere between its peak (maximum) and
zero. Electrical conductors must be large to meet high amperage
requirements.
which never allows the voltage to drop to zero. The more consistent
voltage derived from the three hot conductors results in smoother current
flow and allows small-gauge conductors to be used to distribute the same
amount of AC power. As a result, the load balancing and increased power
Hitachi Virtual Storage Platform F400, F600 Hardware Reference Guide
200V-240V
Data and power cables
Input rating Reference standards
6 AS C112