Werna Alternators For Generator Engines possess some of the most advanced design standards in the world. They are are self-driven, self-regulating, brushless, synchronous machines. The insulation system of the windings conforms to Class H thermal requirements, ensuring that Werna Alternators For Generator Engines are at an international standard for performance and reliability. Werna's range covers 5 kVA to 1386 kVA at 1500/1800rpm, 3000/3600rpm, with 50/60Hz, 110V-690V selection options.