Toshiba International Corporation’s G9000 400 V uninterruptible power system (UPS) features 500 kVA / 450 kW capacity. The G9000 Series offers true online, double-conversion systems providing ultra-reliable power at up to 97% efficiency. The flexible 400 V model range is designed for use with 380 V, 400 V, and 415 V four-wire installations, at 50 or 60 Hz. They are designed for standalone or for parallel use with up to eight units, without requiring paralleling or load-sharing intelligence in the switchgear cabinet.
Using Toshiba IGBT technology in the rectifier/converter, DC/DC chopper, and inverter sections, the 400 V model double-conversion topology provides an AC/DC/AC efficiency of over 95% at loads from 50% to 100%. Even at 25% loading, the efficiency remains greater than 94%. This efficiency curve makes the G9000 an efficient solution for redundant parallel systems where loads are typically 30 to 40%. The all-IGBT design also eliminates the need for a front-end harmonic filter and produces less than 3% input current total harmonic distortion.