... large capacity, high efficiency, no wave distortion, stable voltage adjustment, suitability for kinds of loads, bearing instantaneous overload, ... traffic, military, railroad, scientific culture, etc, where need voltage stabilization. Main t echnology characteristics (DBW.SBW series single ... phase four-wire phase voltage 220±20%, wire voltage 380V±20% or phase voltage 220±30%, wire voltage 380V ± 30%, ...