HP 3PAR User's Guide download pdf (Page 31)

NOTE: When routing the power cords through the bottom of the 2 meter cabinet, the usable

cord length extends 9.5 to 10 feet away from the cabinet. If routing from the top, approximately

4 feet of the power cord is usable.

Electrical Requirements and Limitations

Before physically installing an HP 3PAR Storage system, verify that the operating site has the

necessary electrical circuitry. Each HP 3PAR Storage system will require 4 (200 - 240) Volt, 30

Amp outlets or 2 outlets if only the bottom half of the cabinet is occupied. For proper redundant

power protection, power should be supplied from two or more power sources.

HP 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.

Use the approximate current requirements for storage system components listed in Table 5 (page 10)

to estimate the current requirements for a specific system configurations.

Power Quality

The quality of the input power is critical to the performance and reliability of HP 3PAR Storage

systems. Variations in the input power can cause a power failure or malfunction. Many of the

causes of transient signals and noise on commercial power lines are difficult to locate or are beyond

the customer’s control. To reduce the impact of the irregularities, some form of power conditioning

may be needed. Please consult your electrician for assistance.

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.

Voltage Spikes

HP 3PAR Storage systems are tested to comply with the EN 61000-45 standard.

Electrical Requirements and Limitations 31

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HP 3PAR User's Guide Page 31