Dell PowerEdge 800 - Manual (Page 12)

l PDU — Uses circuit breakers to ensure that the AC current load does not exceed the PDU's rating.
l Surge protector — Prevents voltage spikes, such as those that may occur during an electrical storm, from entering the system through the electrical
outlet. They do not protect against brownouts, which occur when the voltage drops more than 20 percent below the normal AC line voltage level.
l Line conditioner — Maintains a system's AC power source voltage at a moderately constant level and provides protection from brownouts, but does not
protect against a complete power loss.
l UPS — Uses battery power to keep the system running when AC power is unavailable. The battery is charged by AC power while it is available so that
after AC power is lost, the battery can provide power to the system for a limited amount of time—from 5 minutes to approximately an hour. A UPS that
provides only 5 minutes of battery power allows you to save your files and to shut down the system. Use surge protectors and PDUs with all universal
power supplies, and ensure that the UPS is UL-safety approved.
Other Documents You May Need
l The Getting Started Guide describes how to set up your system for the first time.
l The Installation and Troubleshooting Guide describes how to troubleshoot the system and install or replace system components.
l Systems management software documentation describes the features, requirements, installation, and basic operation of the software.
l Baseboard management controller (BMC) documentation describes the features and configuration options of the BMC.
l Operating system documentation describes how to install (if necessary), configure, and use the operating system software.
l Documentation for any components you purchased separately provides information to configure and install these options.
l Updates are sometimes included with the system to describe changes to the system, software, and/or documentation.
l Release notes or readme files may be included to provide last-minute updates to the system or documentation or advanced technical reference material
intended for experienced users or technicians.
Obtaining Technical Assistance
If you do not understand a procedure in this guide or if the system does not perform as expected, see your Installation and Troubleshooting Guide.
Dell Enterprise Training and Certification is available; see www.dell.com/training for more information. This service may not be offered in all locations.
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The Product Information Guide provides important safety and regulatory information. Warranty information may be included within this document or as a
separate document.
NOTE: Always read the updates first because they often supersede information in other documents.