Uninterruptible Power Supply Input voltage: 277 to 520V AC DC input: 240V DC Frequency: 50Hz, ±5% Output voltage: 220V AC ±3% Frequency: 50Hz, ±0.5% Wave form: pure sine wave 3 pieces in redundant parallel available Key features: High frequency and true double conversion online technology Fully digitized microprocessor control Wide input voltage range Zero transfer time LCD or LED display Cold start No add-on CNTL unit required for parallel connection, N+1 parallel redundancy Advanced battery management Automatic battery charge in UPS off mode Lightning and surge protection Short-circuit and overload protection Fan speed auto control when loads varies Optional extension battery pack EMI/RFI noise filter Smart RS-232 communication with monitoring software Optional SNMP card slot Low initial investment and flexible for future expansion Highest reliability and maximum performance for power sharing and redundancy Equipped with maintenance bypass switch Low initial investment and flexible for future expansion Highest reliability and maximum performance for power sharing and redundancy Application: Workstation Network server PCs and peripherals Small and medium-sized companies