THREE-PHASE A.C. SYNCHRONOUS ALTERNATOR 1. JB/T8981-1999 ,IEC34-1 2. three-phase alternator 3. safety usage 4.ACalternator STC series alternator are used in town,countyside,worksites,villages and pastures as emergence power source.The motors are drip-proof with rotary fieald type,IP23,Insulation Class:B or F,adopting harmonic excitation system,safe and reliable using,easy operation and ...