... type unit. Through the circuit protection device, it can realize single phase ground fault, short circuit, overload, low/over voltage, low ... and so on.5, Company image5.1, Sunyear is a high-tech company specializing in this field for over ... e.g. engine controller, water preheater, automatic voltage regulator, generator synchronizer, genset controller, power factor regulator, fuel solenoid, charger for ...