... 400V, 110-690V for option, AVR. EXCITATION SYSTEM:The standard AVR are EA05A-3,EA04: SX440 , SX460 or MAX321(pHonalAVR)The ... ocωSlonsAll the adjusting rate of stable VOltageof the AVR± 1%. SX440 has parallel connection ,low frequency protection ,exterior voltage ... of the speed of engine,Voltage ISadjusted via potentiometer of AVR. INSULATION:Insulation class HAll the regulatory components are made ...