Features: Adjustable Voltage Regulator Module: MCTFW6309F Less than 1% voltage regulation accuracy; 220/400VAC input Strong and ; With low frequency protection function Slow start;Built-in harmonic suppressor Built-in 8A fuse<br><br>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 +/-1% (frequency changes within 4%) The voltage establishment residual magnetization voltage must be 5V25 Hz External voltage adjustment maximum +/-10%@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 5% per 1 (TRIM adjustable)nvironment Vibration 3G@100~2K Hz Relative Humidity Less than 95% Operating Temperature -40~65 Storage Temperature -40~85 Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Material: Plastic colour: As shown<br><br>Package Contents: 1 x Adjustable Voltage Regulator Module<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.