A. AVR Voltage Regulator R448 is a compatible replacement for Leroy Somer R448, R449, R438, and AEM110RE016, as well as Olympian FG Wilson 922 124, suitable for Permanent Magnet Generator or A.R.E.P or Auxiliary Winding type generators. B. Key Specifications: Voltage Regulation < 0.5% (with 4% engine governing); Load Acceptance Module (LAM); 50/60 Hz Selectable; Under Frequency & Exc. Max Protection; Single Phase Or Three Phase Voltage Sensing Optional; Soft Start Voltage Ramping; Normal Rapid Response Time (Option); Sensing Input (Terminal 0-110V = 95~140V, Terminal 0-220V = 170~260V, Terminal 0-380V = 340~520V); Power Input (Voltage 40~150 VAC 3 phase); Output Current (Max. 10A); Current Droop (Max. 4% @ P.F.=0.8); Voltage Build-up (Residual volts at AVR terminal > 5 VAC); Voltage Output (Max. 160 VDC @ 120 VAC); External Voltage Adjustment (10% @ 1 K Ohm 1 watt trimmer); Auxiliary Winding (6~150 VAC (No load rms)); Response Time (0.3~1 sec. @ 20% voltage vibration); LAM Voltage Droop Rate (10% & 15% selectable). C. Environment: Operating Temperature: -40~60°C; Storage Temperature: -40~85°C; Relative Humidity: Maximum 95%; Vibration: 1.5G @ 5~30 Hz / 5.0G @ 30~500 Hz. D. AVR Controls Functions: VOLT: Voltage Adjustment; STAB: Stability Adjustment; V/HZ: UFRO Knee Point Set; EXC.MAX: Excitation Current Limit; STAT: Droop Adjustment. E. Dimensions: 203.0 (L) x 153.0 (W) x 60.5 (H) mm. F. Weight: 970g ±2%.