spec:low frequency on-line ups capacity:8-60kva input:3p4w+g 380vac±25% 50hz±5% output:1p2w+g 220vac±1% 50hz±0.3% output waveform:sine wave transfer time:zero transition application domain:work station/ computer&peripheral equipment/ communication system/ process equipment/ fire protection lighting/ permanently electrified industrial application/ medical system key word:double conversion/ igbt/spwm modulating/cpu/ remote monitoring/rs-232 interface