... brushless AC generator. 2,Certificate of ISO9001:2008. Automatic voltage regulator SY-AVR-2058 1,Introduction:Model: 2058 ... series Introduction: SY-AVR-2058 generator automatic voltage regulators (AVR) are specifically designed to fit ... control system, e.g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator ...