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Specifications and Ratings 117
5.0 SPECIFICATIONS AND RATINGS
5.1 Rating
The kVA and kW ratings and the nominal voltages and currents for continuous operation are listed on the unit
nameplates (inside Operator Control Panel door) and on the System One-Line Diagram. The UPS is rated to
deliver rated kVA and rated kW at 0.8 lagging power factor (pf), or 0.9 lagging pf for some models. However,
the UPS will operate connected loads with power factors ranging from 0.7 lagging through 1.0 (unity).
Connected load kW and kVA are both displayed on the LCD screen when the UPS is powering the load. Power
factor may be easily calculated by kW ÷ kVA = pf.
For load power factors between 0.7 lagging and the rated power factor (usually 0.8 or 0.9), the full kVA rating of
the unit is available. However, above the rated pf the kW rating will become the limiting factor. Note that some
models are specifically rated for a 0.9 lagging output power factor.
For loads with power factors below 0.7 lagging or with leading power factors, the UPS output is kVA limited and
the UPS System may not meet all of its output performance specifications. Consult your Liebert sales representa-
tive for performance specifications for these applications.