WARD GP33 series low frequency on line UPS, champion UPS, industrial UPS from 10KVA to 300KVA. It抯 designed special for data management center, manufacture industry, petrify system, metallurgical industry, power system etc. It抯 adopted twin changing online design, intelligent IGBT module, PWM pulse-width modulation and several CPU, champion UPS, industrial UPS control technology. It抯 the best protection equipment for various kinds of important equipments. It can enlarge the capacity up to 8 units UPS use in parallel.