Power consumption
The type (low-line or high-line) and amount of power (in VA) required by the equipment in a rack
largely determines the type of PDU(s) to use. HP provides online power calculators for making
accurate power consumption estimates for most ProLiant servers. Each calculator (Figure 2) allows the
IT infrastructure designer to predetermine the power requirements for a server chassis according to
configuration parameters entered into the calculator. With accurate estimates of power requirements
for individual server chassis, infrastructure designers can easily calculate power consumption for a
fully-configured rack.
A catalog of HP Power Calculators is available for downloading at the following URL:
http://h71028.www7.hp.com/enterprise/cache/80364-0-0-0-121.aspx?jumpid=reg_R1002_USEN
Figure 2. HP Online Power Calculator (partial screen)
The HP Online Power Calculator also provides estimates of current draw, watts consumed, and inrush
current. These are factors to consider when choosing PDUs. The HP Online Power Calculator also
provides a BTUs/hr calculation for planning the cooling requirements of an installation.
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