... bypass 4. UPS, ECO, EPS Mode Three Phase Double Conversion Online Uninterruptible Power Supply Manufacturer 1.Brief introduction ... nominal frequency50Hz±10%,60Hz±10%Input overtone current6pulses rectifier<30% 12pulses rectifier plus filter <5%Charge modeConstant ... failure will be alertedWork environmentAmbient temperature: -30~50°C,relative humidity: 30%~90%,altitude: <2000M(power reduce 1% ...