1、Wide Input Range: AVR board supports AC180V to 280V single phase or 3 phase input, and the PMG excitation voltage is AC63V to 105V 3 phase. 2、Good Protection: AVR Board has voltage regulation and underfrequency protection to avoid damage, prolongs the service life. 3、High Performance: Automatic voltage regulator has high accuracy, rapid response which is less than 4ms, and stable adjustment performance. 4、Excellent Components: Using high grade capacitor and diode with excellent performance, the voltage regulation board has high reliability. 5、Flame Retardant: Adopt flame retardant and high temperature resistant materials, the diesel generator voltage regulator is safe to use. 1 x Automatic Voltage Regulator1 x Manual1 x Slot Screwdriver4 x Screw4 x Washer4 x Nut4 x Gasket Item Type: Automatic Voltage RegulatorMaterial: ABSModel: VR6Input Voltage: 180-280V AC 50/60Hz single phase or three phasePMG Excitation Voltage: 63-105V AC 100/240Hz three phaseInput Detection Burden: Less than 1VAExternal Voltage Regulating Rheostat: 10KΩAdjustment Accuracy: ±5% normal response of voltage setting valueResponse Time: Less than 4ms