In the event of a power failure, Uninterruptible Power Supplies (UPS) provide emergency instantaneous power to critical devices - computers, data centers, and telecommunications equipment - through energy that is typically stored in a battery. UPS temporarily provide this power to allow for proper equipment shut down (e.g., computers) or for a standby power generator to start up (e.g., at data centers). In addition, UPS are able to protect against power surges, voltage drops, and frequency distortions. ENERGY STAR certified UPS can cut energy losses by 30-55%. A 1000 kVA UPS used in a large data center could save $18,000 annually.
ENERGY STAR UPS covers from the small devices beneath your desk protecting your computer to 8-ton versions designed to temporarily provide a megawatt of power to large data centers.
|UPS Topology Typically Referred To As:||Referred To In ENERGY STAR Specification As:||Typically Sized Up To:||Typically Used For:|
||Voltage and Frequency Dependent (VFD)||1,500 VA||small offices, personal home computers and other less critical applications|
||Voltage Independent (VI)||5,000 VA||small business, Web, and departmental servers|
||Voltage and Frequency Independent (VFI)||1,000 kVA||data centers|
ENERGY STAR certified UPS can also offer multi-mode operation, whereby a more efficient VFD mode is used unless power conditions warrant that a more highly protective VFI mode is needed. Finally, modular UPS, which use changeable small modules (10 to 50 kVA) to adjust for growth as needed, reduce maintenance, and increase efficiency. UPS are more efficient at higher capacity.