... excitation system,easy operation and maintenance.The generators are ther-phase,four-wire type,adopted star connection with neutral point,The ... rated line voltage is 400V,phase voltage 230V,frequency 50Hz,power factor 0.8(lag).we ... .540054.140.81500STC-40405040072.240.81500STC-505062.540090.240.81500 STC SERIES THREE-PHASE A.C. SYNCHRONOUS GENERATOR