![]() ![]() Almost all UPSs also contain integrated surge protection to shield the output appliances from voltage spikes.Ī UPS is typically used to protect hardware such as computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss. ![]() The on-battery run-times of most UPSs are relatively short (only a few minutes) but sufficient to "buy time" for initiating a standby power source or properly shutting down the protected equipment. A UPS differs from a traditional auxiliary/ emergency power system or standby generator in that it will provide near-instantaneous protection from input power interruptions by switching to energy stored in battery packs, supercapacitors or flywheels. Generally speaking, line-interactive UPS systems have lower acquisition costs and on-line UPS systems provide significantly more protection.A tower type UPS with one IEC 60320 C14 input and three C13 outlets A large data-center-scale UPS being installed by electriciansĪn uninterruptible power supply ( UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails. If you are selecting a UPS for a network application outside your home, such as protecting servers and network hardware for a business, you will likely choose between line-interactive and on-line UPS systems. If you want to protect valuable and sensitive computers and electronics, especially in locations with unstable utility power or frequent storms, choose a line-interactive UPS whenever possible. The price difference is negligible in many cases. Even if cost is your primary concern, however, always consider a line-interactive UPS. ![]() Standby UPS systems typically cost less and have some of the smallest space requirements. If you are selecting a UPS for a home or office application, you will likely choose between standby and line-interactive UPS systems. They are explained in more detail above in Top 3 UPS Features and compared below in the UPS Comparison Chart. UPS types (or topologies) include standby, line-interactive and on-line. While generators are operating, UPS systems continue to condition power before it reaches connected equipment. Network and mission-critical applications often include standby generators as part of the facility's backup system, so UPS systems may only require sufficient runtime to support the equipment load until generators start up, stabilize and take over. For applications where shutting down is not an option, many network and mission-critical UPS systems support increasing battery capacity to extend runtime from minutes to hours. Automatic shutdown is also available for unattended computers. In the event of an extended blackout that exceeds the backup runtime of the UPS, battery backup provides an opportunity to shut down computers properly and prevent data loss. Each UPS product information page at provides access to estimated runtimes for the entire range of wattages the UPS can support. Runtime varies depending on the size of the UPS battery and the wattage required by the connected equipment, as well as factors like efficiency, room temperature and battery age. The battery backup runtime of the UPS is the estimated time it will keep connected equipment powered during an outage, without an opportunity to recharge its batteries. During an outage, the UPS system keeps connected devices functioning by supplying electricity from its internal battery. ![]()
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