Key Specifications Parameter Value Model UL33-20kVA Capacity 20 kVA / 16 kW (power factor 0.8) 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 45 - 65 Hz Input Power Factor >0.95 (with optional filter >0.99) Input THDI <10% (standard) / <5% (with optional 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 91% (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-based double-conversion Redundancy N+1, N+X configurations supported Battery Battery Type Internal maintenance-free sealed lead-acid (VRLA) Battery Voltage 480 VDC (40 x 12V batteries in series) Battery Management Advanced battery monitoring, temperature compensation, automatic testing Recharge Time <8 hours to 90% capacity Physical Form Factor Floor-standing cabinet Dimensions (W x D x H) 600 x 800 x 1400 mm (23.6 x 31.5 x 55.1 in) Net Weight Approx. 350 kg (772 lbs) with internal batteries 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 temperature-controlled fans Management & Communication Display Multi-language graphical LCD with status indicators Interface Ports RS-232, RS-485, dry contacts Communication Slots Multiple slots for optional SNMP, Modbus, or relay cards Software Emerson Power Insight, compatible with DCIM/BMS Features Bypass Static bypass switch with manual maintenance bypass Generator Compatibility Advanced generator interface for smooth transition Battery Cold Start Cold start capability from battery Remote Monitoring Optional remote monitoring via SNMP Serviceability Front and side access for maintenance Certifications Compliance CE, IEC, RoHS compliant Standards IEC 62040-3, IEC 62040-2