Input
Voltage: 208, 220, 240, 480 or 600 VAC, 60 Hz. 3-phase,
3-or 4-wire plus ground
Voltage Range: +10, -15% (no battery discharge at -20%)
Frequency Range: 60 Hz, ± 5 Hz
Current Distortion: 10% maximum reflected THD at full
load with optional input filter. 30% THD without filter.
Current Limit: 115% of full load input current
Current Walk-in: 20 seconds to full load.
Power Factor: Up to 0.96 lagging at full load with
optional input filter. 0.80 lagging minimum at full load
without optional input filter.
Surge Protection: Sustains input surges without damage,
per criteria listed in ANSI C62.41-1980, A & B (IEEE 587).
Output
Voltage: 208, 220, 240, 480 or 600 VAC, 60 Hz, 3-phase,
4-wire plus ground.
Voltage Adjustment Range: ±5%.
Voltage Regulation:
±0.5% for balanced load
±1.0% for 100% unbalanced load.
Dynamic Regulation: ± 2.5% deviation for 100% load
step. ±1% for loss or return of AC input.
Transient Response Time: Recover to steady state
within 1 cycle.
Voltage Distortion: For linear loads, 1% THD. Less than
2.5% THD for 100% nonlinear loads (3:1 crest factor)
without kVA/kW derating.
Phasing Balance: 120° ±0.5° for balanced load. 120° ±1°
for 100% unbalanced load. Frequency Regulation: ±0.1%.
Load Power Factor Range: 1.0 to 0.7 lagging
without derating.
Overload: 125% of full load for ten minutes. 150% for
one minute with true sinusoidal waveform.
Environmental
Operating Temperature: 0° to 40°C (UPS), 20°
to 30°C (battery)
Non-Operating Temperature: -20°C to 70°C.
Relative Humidity: 0-95% non-condensing
Operating Altitude: Up to 6,600 feet (2000 meters)
without derating.
Acoustical Noise: Less than 65 dBA typical, measured
1 meter from the unit.
Standards
ETL Listed to UL 1778 and UL 924 UPS standards,
and CSA certified. Meets current requirements for
safe high-performance UPS operation.
Standard Features
Like other Liebert UPS products,
the Liebert Npower includes some
features that are options (or not
available) for some competitors:
n True double-conversion topology,
for protection against 100% of
power \disturbances.
n Internal bypass switch enables
you to isolate the UPS for
maintenance.
n Continuous-duty static switch
performs in pulsed-parallel mode
for supplying fault current and
momentary overloads, and can
operate continuously for longerduration
events.
n Internal output isolation
transformer protects your critical
load from \common-mode noise
and harmful DC offsets. In some
configurations, it \provides a
separately derived source,
to support 4-wire loads without
having to pull a neutral line from
the \service entrance.
n Automatic input filter disconnect
isolates the input filter capacitors
at light loads to avoid presenting a
leading power factor to the utility
or backup generator.
n Backlit LCD graphic display
enables easy navigation between
the graphic mimic screen and the
menu screens.
n Event Log can display up to
512 time-and-date-stamped
alarm events.
n Battery self-test helps verify the
battery’s readiness to carry the
critical load.
n Battery temperature-compensated
charging prevents overcharging
in high ambient operating
temperature or undercharging
in cold weather.
Battery Cycle Monitor records up
to 132 battery discharge events.
n Battery Time Remaining feature
displays backup time remaining
at present connected load.
n On-generator battery charge limit
reduces recharge current until the
utility AC power is restored.
n Front-panel control of all
configuration and fieldadjustment
options simplify
installation and maintenance.
n Top-and-bottom cable entry
gives the installer more options
for equipment location.
n Two-hole bus bar landing space
and accessible terminal blocks for
options can simplify installation.
n Casters under the unit are
helpful when a forklift is not
readily available.
n One-button startup for
simpler operation.
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