This product is designed and developed with the international advanced compersation technology. It can keep the output voltage steady state automatically when the network voltage is fluctuated or the load current is varied, which canensure the consumer run smoothly. It has the advantage of large capacity, high efficiency, no waveform distortion, simple operation and maintenance, reliablerunning, full-capacity output under tower input voltage if compared with other voltage stabilizer. It is provided with overvoltage, over current, phase sequence and so on protection function. It is suitable for electric supply in small sized plant, workshop and department in middle, large-sized mining enterprise, it can be widely used in the precision machine tool, precision instrument, test device, elevator, imported electromechanical device, Production flow lime in the mining enterprise, oil field, railway, building site, school, hospital, hotel, scientific research department and so on, it is also suitable for the user in the user in the LV electric network end with low powervoltage and big wave range.