Power Quality and Protection
External Power Problems
Protecting Against Power Problems (Surge Suppressor)
Protecting Against Power Problems (UPS)
Summary Slide

Protecting Against Power Problems (UPS) (cont.)

Two types of UPS units are available: Standby UPS: Operates normally from its AC side. When the power drops, it switches over to its battery backup side. In-line UPS: Operates normally from its DC or battery backup side. The AC side is only used in the event of a problem with the battery-powered circuits. UPS units are often confused with a standby power supply (SPS), or battery backup, which only supplies power when none is available and has no power conditioning abilities. Never plug a laser printer or monitor into a conventional PC UPS. These devices are not critical to the operation of the PC and draw tremendous amounts of power at startup.