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