is large power and true on–line UPS with range from 10KVA to 80KVA, which adopts advanced digital design, high speed 16–bit chip, ASIC, DDC and large power IGBT&SCR, and shows large capacity, high stability and super performance compared with usual models on the market. All the products have integrated the latest hardware and powerful software in itself, which could provide optimum pure power to integrated server center. This system supports several units connected in parallel through unique control technology.