Features: Working principle: AVR automatic voltage regulator of brush generator is a partially sealed electronic regulator, which control the output voltage of alternating current brush generator by adjusting the excitation current of generator. Adjustment of rating voltage of the unit: slowly adjust the voltage regulating potentiometer of AVR to make the output voltage of the unit reach the rating value; (increasing clockwise and decreasing counterclockwise) Current protection point adjustment: when the generator is loaded and the current reaches the protection point current, slowly adjust the current potentiometer and adjust it to the moment when the overload indicator light turns from dark to bright; With intelligent integratedly circuit chip control, Automatic circuit protection function. If the input voltage of winding of capacitive protection is overvoltage, the unit operation will be stopped. Output current flow automatic stop, automatic stop outside the output voltage is more than 10% of the rating voltage output load is too large or too short will automatically stop. Specifications: Component:ABS Size:Approx.148mmx80mm/5.83x3.15inch Color:Black Sensing Input/Power input Voltage：120(90-132VAC) or 240(190-264VAC), 1 phase 2 wire Magnetic field output Voltage：Max 90VDC at 207VAC input Features: Stability of output voltage±5% Function: Over-current protection Overvoltage protection Overload protection Load short circuit protection Package Includes: 1pcs Automatic Voltage Regulator note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual coloring of the item. Thanks for your understandings.