Alternator Voltage Regulator with Field Current Protection is designed for three phase slip ring type alternators and provided with 50/ 60 Hz LED indicator. The Alternator Voltage Regulator is designed with over excitation field current protection facility and fully PU potted in ABS plastic base plate. The Alternator Voltage Regulator has the option to select maximum excitation voltage of 380 V DC or 200 V DC. Alternator Voltage Regulator with Field Current Protection ensures an option to select maximum excitation voltage of 380 V DC or 200 V DC.