HP BladeSystem c3000 Manual page 28

Figure 19. HP BladeSystem c3000 Enclosure supports up to six power supplies
High efficiency HP c3000 power supplies provide greater than 90 percent efficiency in AC to DC
conversion. These power supplies use the ProLiant universal form factor so they can also be used in
other ProLiant servers. Each power supply ships with a standard power distribution unit (PDU) power
cord (C13 to C14), and each enclosure includes c13 to c20 power cords for different types of PDUs.
By purchasing proper wall outlet cords, users can connect the power supplies to standard wall outlets.
CAUTION
Wall outlet power cords should only be used with low-line
power sources. If high-line power outlets are required, safety
regulations require either a PDU or a UPS between the c3000
enclosure power supplies and wall outlets.
The enclosure can contain up to six 1200-watt self-cooled power supplies. Most typically, the c3000
enclosure would be deployed at sites that would not normally have datacenter AC redundancy to
racks. Therefore, the c3000 has been configured so that only four power supplies are needed in a
Power Supply Redundant (N+1) mode, where the enclosure would be connected to a UPS, or a single
PDU, or directly into 110V wall outlets. If there is a need for dual AC power feeds and datacenter-
like AC Redundancy, 6 power supplies can be configured to connect to a pair of PDUs (three
connected to each PDU). A variety of PDUs are available, as indicated in the c3000 QuickSpecs:
. The HP BladeSystem
http://h18004.www1.hp.com/products/quickspecs/12790_div/12790_div.html
Power Sizer is a tool for sizing the PDU appropriately for the c3000 storage and server
configuration. 4
HP expects that in many of the markets targeted for the c3000 enclosure (midmarket and remote
sites), the c3000 will be connected to an uninterruptible power supply (UPS) for power backup
instead of to a PDU (Figure 20). HP recommends using HP BladeSystem Power Sizer to determine the
number of power supplies needed in the c3000 and to determine the UPS capacity requirement.
4 See the For more information section at the end of this document for a link to the HP BladeSystem Power Sizer.
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