HP ProLiant DL360 Manual page 11

hp ProLiant DL360 generation 3 server high-density deployment technical white paper
IMPORTANT: The examples shown in the following sections use the maximum rating of the
power supply. They are for reference only.
Example
One high-voltage PDU (P/N 252663-D72) has a current rating of 24 A. The server has a total
input current rating of 1.7 A at 208 V.
24 A (PDU current rating) / 1.70 A (server total input current rating) = 14
This PDU can support a maximum of 14 servers at full server input current ratings.
Example
One low-voltage PDU (P/N 252663-D71) has a current rating of 24 A. The server has a total
input current rating of 3.7 A at 100 V.
24 A (PDU current rating) / 3.70 A (server total input current rating) = 6
This PDU can support a maximum of 6 servers at full server input current ratings.
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input power budget allocation
This section explains how to allocate the input power budget for each server. This method can be
used when a PDU is used to support a known number of servers. It is important to verify that the
calculated power budget allocation will be sufficient to support the worst-case server
configurations that are to be deployed.
The allocated input power for each server is calculated by multiplying the allocated input current
for each server with the line voltage.
Allocated Input Power = Allocated Input Current * Input Line Voltage
Example
Assume a high voltage PDU rated at 24 A is to support 14 servers. Each server can be allocated
1.71 A. If the line voltage is assumed to be at 208 V, then the allocated input power budget for
each server will be (1.71*208) = 356 W.
Since the input power budget of 356 W exceeds the fully configured system measured input
power of 292 W (as shown in Table 2), 14 ProLiant DL360 Generation 3 servers can be
supported by a 24 A high-voltage PDU. That means, three of these PDUs are needed to support
42 servers in a 42U rack.
selecting server power cords
To select the appropriate server power cord, check the cable management system installed in the
rack. Generally, the sliding rail cable management system requires a power cord that is 1.8 m
(6 ft) in length. This length provides enough slack for the power cord to route through the cable
management arm.
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