Key Specifications Parameter Value Model Number ITA-20K00AL3A02C00 Series Liebert ITA (3-phase) Capacity 20 kVA / 20 kW (unity power factor) UPS Type Three-phase Online / Double-conversion Input Input Voltage 380/400/415 VAC (3-phase, 4-wire + ground) Input Voltage Range 304 - 456 VAC (full performance) / 228 - 304 VAC (derated) Input Frequency 40 - 70 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) Output Frequency 50/60 Hz ±0.2% (Battery mode, auto-sensing) 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 95% (Double-conversion) / Up to 98% (ECO mode) Parallel Capability Up to 4 units in parallel for redundancy or capacity (up to 80 kVA) Topology Transformer-free with three-level IGBT technology Redundancy N+1, N+X configurations supported Battery Battery Type External battery bank required (VRLA, lithium-ion, or NiCd compatible) Battery Voltage 480 VDC (typical, 40 x 12V batteries in series) Battery Management Advanced ABM technology, temperature compensation, automatic testing Charger High-capacity internal charger for extended runtime Physical Form Factor Rack-mount / Tower convertible (3U height) Dimensions (W x D x H) 430 x 600 x 132 mm (16.9 x 23.6 x 5.2 in) Net Weight Approx. 18 kg (39.7 lbs) Protection Rating IP20 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 variable speed fans Management & Communication Display Multi-language graphical LCD with status indicators Interface Ports USB, RS-232, RS-485, dry contacts Communication Slots 2 slots for optional SNMP, Modbus, BACnet, or relay cards Software Vertiv Power Insight, Liebert Nform, DCIM/BMS integration Features Bypass Static bypass switch with manual maintenance bypass Generator Compatibility Advanced generator interface with frequency tracking Battery Cold Start Cold start capability from battery ECO Mode Energy-saving ECO mode for non-critical loads Remote Monitoring Optional remote monitoring via SNMP or cloud Serviceability Hot-swappable fans and modular design for easy maintenance Certifications Compliance CE, UL, IEC, RoHS compliant Standards IEC 62040-3 (VFI-SS-111 classification), IEC 62040-2