... ac voltage stabilizer, TNS Three-phase Voltage Stabilizer, DBW Voltage Stabilizer Three-phase High precision ac voltage stabilizer, TNS Three-phase Voltage Stabilizer, DBW Voltage StabilizerIntroductionTNS ... the source voltage is single-phase 220V or three-phase 380V Service Occasions Computers, test equipment, lighting systems, safety alarm systems, X-ray systems ...