The Sincro BL4C AVR (106660) Automatic Voltage Regulator is designed for use on 50/60Hz brush less generators. The regulator includes Frequency Compensation. The Sincro AVR BL4C Voltage Regulator is BL4 AVR with different sensing inputs for compatibility with different alternators.
NOW REPLACED by BL4U P/N 157862
All of our AVRs are field type tested.