STC Series three-phase A.C. synchronous generator INTRODUCTIONThegeneratorsaretobeusedintown,thecountryside,worksites, Mountainandpasturelandsasaelectricpowersourceforlightingpurpose, Itcanalsobeusedasareservedpowersourceforemergentcase.Thegeneratorsareofdrip-proofwithrotaryfieldtypeandwiththeadoptionofharmonic excitationsystem,thatallowyoureasyoperationandsimplemaintenance.Thegeneratorsareofthree-phasefour-wiretype,makinguseofatarconnectionwithneutralpoint.Theratedlinevoltageis400V.Phasevoltage 230V.Frequency50Hz.powerfactor0.8(lag).Itcanprovide60Hzandtheothervoltage'sgenerator accordingtonecessary.TheycanbecoupledwithaprimemoverdirectlyorthroughV-beltmakingrightorreversecontinuousrotationattheratedspeed,whentherevolution slipofprimemoveris3%andloadvariesintherangeof0-100%cosφ1.0-0.8theygiveFoodconstantvoltage.Aftersuddenchange(increaseordecrease)ofload.thegeneratorswillsoonreturntotheirnormalworkingstate,withoutany startingdevicesthegeneratorcandirectlystartanunloadedsquirrelcageInductionmotor.