... It can replace Stamford 440 voltage regulator. 2,Approved by ISO9001:2008 standard. Automatic Voltage Regulator SY-AVR-20501, ... generator AC exciter, it can automatic adjust the output voltage of generator.2.2 SY-AVR-2050 series products ... decreases, the output voltage also decreases.MAX EXCITING VOLTAGE OUTPUT100VPOWER VOLTAGE(PHASE VOLTAGE)AC 180~250V(50Hz/60Hz)MAX OUTPUT EXCITATION CURRENTDC 3AMIN ...