Key Specifications Parameter Value Series Liebert NX Capacity 400 kVA / 400 kW (unity power factor) UPS Type Three-phase Online / Double-conversion Input Input Voltage 380/400/415 VAC (3-phase, 3-wire + ground or 4-wire) Input Voltage Range 304 - 456 VAC (full performance) / 228 - 304 VAC (derated) Input Frequency 45 - 65 Hz Input Power Factor >0.99 Input THDI <3% (with internal filter) Output Output Voltage 380/400/415 VAC (3-phase, 4-wire + ground, adjustable) Output Voltage Regulation ±1% (Static load) / ±3% (Dynamic load) Output Frequency 50/60 Hz ±0.1% (Battery mode) Output Waveform Pure Sine wave Overload Capacity 110% for 60 minutes / 125% for 10 minutes / 150% for 60 seconds Crest Factor 3:1 System Efficiency (AC mode) Up to 96% (Double-conversion) / Up to 99% (ECO mode) Parallel Capability Up to 8 units in parallel for redundancy or capacity (up to 3.2 MW) Topology Transformer-free with three-level IGBT technology Redundancy N+1, N+X configurations supported Battery Battery Type VRLA, lithium-ion, NiCd compatible Battery Voltage 480 VDC (typical, 40 x 12V batteries in series) Battery Management Advanced ABM technology, temperature compensation, automatic testing, cell-level monitoring Charger High-capacity intelligent charger with temperature compensation Physical Form Factor Floor-standing cabinet Dimensions (W x D x H) 1600 x 850 x 1900 mm (63.0 x 33.5 x 74.8 in) typical Net Weight Approx. 1150 kg (2535 lbs) depending on configuration Protection Rating IP20 (standard) / IP21 or higher optional Environment Operating Temperature 0°C to +40°C (32°F to 104°F) Storage Temperature -25°C to +55°C (-13°F to 131°F) Operating Humidity 0% to 95% (non-condensing) Altitude Up to 1000m without derating / Derated above 1000m Cooling Forced air ventilation with redundant, variable speed fans Management & Communication Display 7-inch multi-language graphical color touchscreen Interface Ports RS-232, RS-485, USB, Ethernet (standard) Communication Protocols SNMP, Modbus RTU, Modbus TCP/IP, BACnet IP, BACnet MS/TP, Profibus Communication Slots Multiple expansion slots for additional communication cards Software Vertiv Power Insight, Trellis DCIM integration, Liebert Nform Features Bypass Static bypass switch with manual maintenance bypass Generator Compatibility Advanced generator interface with soft start Battery Cold Start Cold start capability from battery ECO Mode Energy-saving ECO mode for non-critical loads Remote Monitoring Cloud-based monitoring capability Serviceability Front-access design for easier maintenance Certifications Compliance CE, UL, IEC, RoHS, ISO 9001 Standards IEC 62040-3 (VFI-SS-111 classification), IEC 62040-2