Electrical Grade Alternator Voltage Regulator works on an input voltage ranging up to 475V AC with an input frequency ranging from 50Hz to 60Hz. The Voltage Regulator is half wave thyrister controlled associated with free wheeling diode for brush-less type alternators which ensures optimum performance. The Voltage Regulator is easy to install and offer accurate measurement with adequate fuse protection. Electrical Grade Alternator Voltage Regulator is easy to maintain and offer long functional life.