Armor series UPS 160~500KVA acquires online double conversion with full DSP technology. Its rectifier adopts three-level PWM rectifier technology based on IGBT components, realizing excellent performance of high input power factor and low input harmonic current. Its inverter also adopts PWM technology based on IGBT components, and is equipped with output isolation transformer, realizing high performance of stable voltage, stable frequency, low waveform distortion, strong load capacity and impact resistance capacity. Armor series UPS remains a high efficiency of an output power factor to 0.9, offering high quality power for all kinds of loads, especially inductive or capacitive loads in industrial applications.