Technical Specifications

1
LIEBERT
®
NX
™
3-PHASE UPS: 40-200KVA, 60HZ, 480VAC - SITE PLANNING DATA
The Liebert NX is a true on-line,
double conversion, three-phase
UPS system that delivers
complete, centralized power
protection for mission-critical
systems.
General Specifications
INPUT
Voltage 480VAC, 60Hz, 3-phase 3-wire plus ground
Voltage Range w/o derating +15%, -20%
Frequency Range 57-63Hz
Current Distortion 3% maximum reflected THD at full load
Current Limit 125% of full load input current
Power Factor >0.99 lagging at full load; >0.98 lagging at half load
Surge Protection Sustains input surges without damage, per criteria listed in IEC 61000-4-5
OUTPUT
Voltage 480VAC, 60Hz, 3-phase 3-wire plus ground
Voltage Adjustment Range ±5%
Voltage Regulation 1% for balanced load 2% for 100% unbalanced load
Dynamic Regulation ±5% deviation for 100% load step; ±1% for loss or return of AC input
Transient Response Time Recover to ±5% of output voltage within 1/2 cycle
Voltage Distortion For linear loads, 1% THD; Less than 4% THD for 100% nonlinear loads without kVA/kW derating
Phasing Balance 120° ±0.5° for balanced load; 120° ±1° for 100% unbalanced load
Frequency Regulation ±0.05% single module; ±0.25% paralleled modules
Load Power Factor Range 0.5 lagging to 1.0 without derating
Overload 125% of full load for 10 minutes; 150% for 1 minute, with true sinusoidal waveform
ENVIRONMENTAL
Operating Temperature UPS: 32° to 104°F (0-40°C); Battery: 68° to 86°F (20-30°C)
Non-Operating Temperature -13° to 158°F (-25° to 70°C)
Relative Humidity 0-95% non-condensing
Operating Altitude Up to 6,500 ft. (2,000m) without derating
Acoustical Noise (full load)
80kVA <67dB at 80-104°F (27-40°C) ambient; <61dB below 80°F (27°C) ambient
120kVA <69dB at 80-104°F (27-40°C) ambient; <63dB below 80°F (27°C) ambient
200kVA <74dB at 80-104°F (27-40°C) ambient; <68dB below 80°F (27°C) ambient
STANDARDS
Listed to UL 1778 UPS standards, and CSA certified. Meets current requirements for safe high performance UPS operation.