... Design, Audible AlarmHT series online UPS 6-20kVA characteristics:1. True online double conversion technology2. IGBT PFC technology. ... (default), user adjustable within 40-60HzPower factor0.98OutputVoltage220VAC ± 1%Frequency50/60Hz± 0.2Hz(line mode), 50/60Hz± ... loadOverload capability105%-130% for 10 minutes, 130% for 1 minutesCrest factor3:1Battery TypeSealed, maintenance free, lead-acidBackup time5 ...