Hitachi Virtual Storage Platform F350 - Branch Circuits; Emergency Power Control

Potential
source Description
Wall outlets Power outlets for building maintenance and janitorial equipment,
such as vacuum cleaners and oor buers, must be wir
ed from
circuit breakers on a power panel separate from the computer
system panel. The ground wires from these outlets must connect to
the normal building distribution panel and not to the system
ground. If a separate power source and separate ground are not
provided, maintenance and janitorial equipment can induce
electrical noise that can aect operation of the storage system. Your
electrician can verify whether maintenance outlets are on separate
panels.
Lightning In geographical areas subject to lightning storms, you may want
install lightning protection for your storage system. The principles of
lightning protection and personnel safety are described in the
National Fire Protection Association (NFPA) Handbook.
Electromagnetic
interference
Electromagnetic interference can cause various problems. The
storage system is designed to reduce its susceptibility to radiated
and conducted interference. A Hitachi representative can advise you
about common causes of electromagnetic interference.
Branch circuits
Prepare your site to support the recommended power parameters of your storage
system.
Plan to set up redundant power for each rack that contains a Hitachi VSP storage system.
Supply the power with a minimum of two separate circuits on the building's electrical
system. That way, if one circuit fails, the remaining circuit(s) should be able to handle the
full power load of the rack. In addition, each Power Distribution Unit (PDU) within the
rack should be powered by a separate power circuit.
Each circuit should be rated appropriately for the storage system model and input
voltage. Refer to the storage system's electrical specications for power requirements
specic to each model.
Note: When calculating the po
wer requirements for circuits that supply
power to the rack, consider the power requirements for network switches.
Emergency power control
For safety purposes, consider installing emer
gency power-o controls for disconnecting
the main power to the storage system.
Branch circuits
Chapter 2: Power requirements
Site Preparation Guide for VSP G/F350, G/F370, G/F700, G/F900 48