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 laggingwithout derating.
• Overload- 125% of full load for ten minutes. 150% for one minute with true sinusoidal waveform.

Environmental

• Operating Temperature- 0 to 40C (UPS), 20 to 30C (battery) Non-Operating Temperature: -20C to 70C.
• 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:

• True double-conversion topology, for protection against 100% of power disturbances.
• Internal bypass switch enables you to isolate the UPS for maintenance.
• Continuous-duty static switch performs in pulsed-parallel mode for supplying fault current and momentary overloads, and can operate continuously for longer duration events.
• 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.
• 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.
• Backlit LCD graphic display enables easy navigation between the graphic mimic screen and the menu screens.
• Event Log can display up to 512 time-and-date-stamped alarm events.
• Battery self-test helps verify the battery?s readiness to carry the critical load.
• 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.
• Battery Time Remaining feature displays backup time remaining at present connected load.
• On-generator battery charge limit reduces recharge current until the utility AC power is restored.
• Front-panel control of all configuration and field adjustment options simplify installation and maintenance.
• Top-and-bottom cable entry gives the installer more options for equipment location.
• Two-hole bus bar landing space and accessible terminal blocks for options can simplify installation.
• Casters under the unit are helpful when a forklift is not readily available.
• One-button startup for simpler operation.