2-7
Line Voltage
The AC line voltage available from a wall outlet is determined by the local electrical power provider
and the building power distribution network. Voltages outside the operating range of the system can
cause system errors, or a system shutdown. If required, the Hewlett-Packard CE along with your
electrician can determine the line voltage and make recommendations. Avoid the use of a line voltage
conditioner.
NOTE
Make sure that there are enough wall outlets at the correct voltage to
support the entire system including its PowerTrust UPS if so
equipped. See “PowerTrust UPS Power Requirements” below.
PowerTrust UPS Power Requirements
Each PowerTrust UPS installed in the computer system’s expansion cabinet(s) requires an AC power
source that meets the specifications in Table 2-2. Ensure that there are enough AC power sources to
match the number of PowerTrust UPSs in the system.
If PowerTrust UPSs are to be added to an existing system, each expansion cabinet in which a
PowerTrust UPS is installed must be provided with its own 30A power source which meets the
specifications in Table 2-2. This 30A source for the UPS is in addition to the original 20A source for
each expansion cabinet.
CAUTION
It is recommended that you do not place intervening power
conditioning equipment between the PowerTrust UPS and the AC
mains power source. Some power conditioning equipment can
interact with the PowerTrust unit and cause faulty operation.
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