Uninterruptible power supplies UPS are
combinations of rectifiers, inverters, switches and energy storage devices, e.g.
batteries, forming a power supply system which ensures a permanent supply of the
load in case of a supply voltage breakdown. Output-Voltage
and frequency remain within the static and dynamic limits defined for the load.
The international product standard IEC 62040-3
classifies UPS according to these limits into the classes 1, 2 or 3. UPS can be
used for small IT computer networks as well as for computing centers in the
field of telecommunications, for Internet nodes, in industrial installations,
hospitals and power plants.
UPS systems comprise customised system
solutions being combined of rectifiers, inverters and energy storage devices,
e.g. batteries. They are used wherever high operating safety and reliability are
required for "mission-critical" applications, even under difficult
conditions and over long periods. Click here to
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