... ,Cummins 4BTA3.9-G2 2,Output: 50KW, AC 3 Phase 3,90A,CE.ISO,CQC 4,Rated Voltage: 400/220V ... Speed1500RPMCycleFour strokeCooling MethodWater CoolingBore×Stroke(mm)102*120Displacement(L)3.9Compression Ratio16.5:1Speed GovernorElectricalCooling SystemWater-cooledTotal Lubrication ... the control panel and is coordinated with an automatic type contral cabinet, thus serving the fuction of automatic changeover ...