... 2,Approved by ISO9001:2008 standard. Automatic Voltage Regulator SY-AVR-20501,IntroductionSY-AVR-2050 generator automatic voltage regulator ... brushless generators.2,Technical characteristics and application 2.1 SY-AVR-2050 generator automatic voltage regulator (AVR) ... installation, suitable to work under vibration. 3,ParametersTYPEFUNCTION SY-AVR-2050F/V LOW FREQUENCY PROTECTIONOptional (47/56Hz) ...