Reference Guide

5.13
3PAR InServ E-Class/F-Class Storage Server Physical Planning Manual
5.5 Voltage and Frequency Tolerance
Steady state voltage must be maintained within 10 percent of the normal rated voltage,
measured (under load) at the power input terminal of the specified server. The frequency must
be maintained at (50-60 Hz), 1 phase 50/60 +2 percent, -4 percent.
When there is a possibility of brownouts or other marginal voltage conditions, installing a
voltage monitor may be advisable.
5.6 Voltage Spikes
The 3PAR InServ Storage Servers are tested to comply with the EN 61000-45 standard.
Installing a lightning protection device on the server room power source is recommended
when the following conditions exist:
■ The primary power is supplied by an overhead power service.
■ The utility company installs lightning protectors on the primary power source.
■ The area is subject to electrical storms or an equivalent type of power surge.
5.7 Electrostatic Discharge
The InServ Storage Servers are susceptible to failure due to Electrostatic Discharge (ESD).
Electrostatic charges can accumulate on people and furniture because of direct contact with
floor coverings or movement while in contact with furniture coverings. Discharge of static
electricity to a metal surface on server cabinets can interfere with the system’s operation and
cause discomfort to anyone who comes in contact with it.
Some factors that contribute to electrostatic discharge are:
■ High-resistance floor covering.
■ Carpeting without anti-static properties.
■ Low humidity (less than 20%).
The InServ Storage Servers are tested to comply with the EN 61000-45 standard.