... -friendly 2,brushless stamford alternator 3,competitive price ST Series Single-phase synchronous alternator 1,safe,environment-friendly 2,brushless stamford alternator ... output: 6.5KW to 30kW (8KVA-37.5KVA) 2) Rated voltage: 400V,400/230V,230V,415V,etc. 3) Rated frequency: 50 ... / 60Hz 4) Rated speed: 1,500 / 1,800rpm 5) Three-phase four-wire 6) Protection: I5P21- IP23 7) Insulation: Class H ...