Our alternators are self-exciting, self-regulating, brushless synchronous machines. The full range covers ratings from 5 KVA to 1380 KVA, 1500/1800/3000/3600 rpm, 110~***** copper wires have insulation Class H, beared over 200 degree C temperature. The laminate sheets are built by 0.5mm thickness piece compacted, Iron loss less than 4.5W/kg. Insulation papers come from US DUPONT company. All windings are impregnated by Vacuum pressure equipment. In the production process, all windings are passed 2200V high voltage testing.