Fangrui Product Details Features: Adjustable Voltage Regulator Module: Mctfw6309f Less Than Voltage Regulation Accuracy; 220/400vac Input Strong And ; With Low Frequency Protection Function Slow Start;built-in Harmonic Suppressor Built-in 8a Fuse Technical Parameters Sampling Input 220/400vac (short-circuit Switch) Voltage Input 180-276vac Excitation Output Voltage Maximum 90vdc@240v Continuous Current 5a Non-continuous 8a10 Seconds Resistor Minimum 15 Ohms Voltage Regulation Accuracy Is Less Than +/- (frequency Changes Within ) The Voltage Establishment Residual Magnetization Voltage Must Be 5v25 Hz External Voltage Adjustment Maximum +/-@1k1w Potentiometer Voltage Build-up Time 4 Seconds Static Power Consumption Maximum 8 W Built-in Harmonic Suppressor Low Frequency Protection 50hz Knee Value Is 46 Hz 60hz Knee Value Is 56 Hz Overexcitation Protection Factory Default Value 75vdc Simulation Voltage Input (a1, A2) Input Impedance 2 K Maximum Input +/- 5 Or + 0 -10 Sensitivity Per 1 (trim Adjustable)nvironment