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An Uninterruptible
Power Supply (UPS), also known as an Uninterruptible Power Source,
Uninterruptible Power System, Continuous Power Supply (CPS) or a battery backup
is a device which maintains a continuous supply of electric power to connected
equipment by supplying power from a separate source when utility power is not
available.
An off-line UPS remains idle until a power failure occurs, and then switches
from utility power to its own power source, almost instantaneously. An on-line
UPS continuously powers the protected load from its reserves (usually lead-acid
batteries or stored kinetic energy), while simultaneously replenishing the
reserves from the AC power.
A UPS should not be confused with a standby generator, which does not provide
protection from a momentary power interruption and may result in an interruption
when it is switched into service, whether manually or automatically. Such
generators are typically placed upstream of the UPS to provide cover for lengthy
outages.
Brands
American Power Conversion , APC , Apricorn , Belkin , Clarion , Compaq , CPQ ,
Digi , Eaton ,Emerson Network Power , Fellowes , GPS , Helios ,
Hewlett-Packard , Hunter, IBM, Lexar , Liebert , MGE UPS
Systems , Minute Man , Nortel , Online USV-Systeme , Opti UPS, OPTI UPS
CORPORATION , Paradyne , Powerware , StarTech, Tripp Lite, Tripplite ,
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