HP ProLiant Servers AIS: Official Study Guide and Desk Reference

Data centers cannot rely on utility power grids as a source of continuous power for critical equipment. HP has developed a full line of power-management products that protect and manage computer systems ranging from individual workstations to distributed enterprises including uninterruptible power systems (UPSs) and power-distribution units (PDUs).

For applications that require a high level of fault tolerance, the power source for the equipment should be protected by a UPS. The UPS is connected between the equipment and the electrical outlet or PDU.