... Alternator:Stamford ,MECC,Yabo brushless seires3) Power: 10 - 50kVA4) Voltage: 400 / 230V or 240/120V5) Frequency: 50 / 60Hz6) ... Protection: IP237) Insulation: H Specifications Engine: 1)Heavy load durable, four-stroke, water/air cooled engine 2 ... H/HTelephone Influence Factor (TIF):<50THF:<2%Voltage Regulation, Steady State:≤ ±1%Alternator Capacity:10~40KwAlternator Efficiencies:88~95% ...