Reference Guide

5.7
3PAR InServ E-Class/F-Class Storage Server Physical Planning Manual
5.3 Electrical Requirements and Limitations
Before physically installing an InServ Storage Server, verify that the operating site has the
necessary electrical circuitry. Each InServ Storage Server will require 4 (200 - 240) Volt, 30 Amp
outlets or 2 outlets for 1 Meter cabinets or if only the bottom half of the 2 Meter cabinet is
occupied. For proper redundant power protection, power should be supplied from two or
more power sources.
3PAR recommends the installation site conform to the electrical specifications detailed in ANSI/
TIA-942-2005 Annex G5, specifically:
■ Use of K-rated isolation transformers, typically 480:208V/120 volt step-down transformers,
will minimize any common mode noise between electrical ground and neutral. The voltage
delta between power ground and signal ground will also be reduced. Isolation
transformers should be located as close to the load as possible.
■ Appropriate capacity Transient Voltage Surge Suppression (TVSS) devices should be
installed at each level of the facility electrical distribution system. Each distribution panel
should have its own dedicated TVSS. This multi-tiered approach has proven to be effective
at reducing electrical transients.
■ The installation site should have a comprehensive building ground system. A properly
grounded building perimeter loop should be provided and the building steel should be
bonded to the system at every other column. This building ground system should be
directly bonded to all major power distribution equipment, including all switchgear,
generators, UPS systems, transformers, etc., as well as to the telecommunications systems
and lightning protection system.
■ Installation of a UL Master-Labeled lightning protection system is recommended.
5.3.1 Power and Heat Dissipation
Use the approximate current requirements for storage server components listed in Table 5-1 to
estimate the current requirements for a specific system configuration.
Table 5-1. Power and Heat Specifications
1 Meter Cabinet (Only available for the E200)
Max. Watts per Cabinet (fully populated) 2,880