Automatic Voltage Regulator 1,It can replace Stamford 440 voltage regulator. 2,Approved by ISO9001:2008 standard. Automatic ... designed to fit the fundamental wave excitation AC brush and brushless generators.2,Technical characteristics and application 2.1 SY-AVR ... patents.5,CertificateOur products are approved by ISO9001:2008 standard. Stamford 440 Voltage Regulator Replacement SY-AVR-2050