Stratus ftServer 2900 Series, Планирование и руководство по установке

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Determining PDU Requirements
5-2 Stratus ftServer 29x0, 49x0, and 69x0 Systems: Site Planning and Installation Guide (R786)
Use the information in “Determining PDU Requirements” on page 5-2 to plan the rack
configuration for your ftServer system. “Example of PDU Usage Calculation” on
page 5-4 shows how to use the information you gather for planning the rack
configuration.
W A R N I N G !
For important safety information about your PDUs, see
“PDU Safety Considerations” on page B-10 .
A V E R T I S S E M E N T
!
Pour obtenir des informations importantes sur la sécurité
de vos unités de distribution de l’alimentation, consultez la
section
“PDU Safety Considerations” on page B-10 .
Determining PDU Requirements
Using the nominal voltage rating of the power receptacle at your site and the total
wattage of the components that will draw power from the A-side PDU, complete the
information in Tables
5-1 and 5-2 . This information will help you determine the current
that the ftServer systems and rack-mounted components will draw and whether you
need a second pair of PDUs.
To complete Table 5-1
1. Obtain the voltage available at your location. Consult a facilities manager at your
site to make sure you know the correct voltage.
2. For each type of component you plan to place in the rack, calculate the required
current, as follows: Divide the wattage of the element, listed in the Watts column of
Table 5-1 , by the voltage available at your site. Multiply the result by 1.25 and enter
the value in the Current column.