... 4BTA3.9-G2 2,Output: 50KW, AC 3 Phase 3,90A,CE.ISO,CQC 4,Rated Voltage: 400 ... strokeCooling MethodWater CoolingBore×Stroke(mm)102*120Displacement(L)3.9Compression Ratio16.5:1Speed GovernorElectricalCooling SystemWater-cooledTotal ... of Phase3Connecting Type3 Phase and 4 WiresNumber of BearingsingleProtection GradeIP23Altitude ≤1000MExciter TypeBrushless ,Self-exciting, AVR automatic voltage ...