①. AVR Voltage Regulator R448 is a compatible replacement for Leroy Somer R448, R449, R438, AEM110RE016, and Olympian FG Wilson 922 124, suitable for Permanent Magnet Generator, A.R.E.P, or Auxiliary Winding type generators. ②. Voltage Regulation: < 0.5% (with 4% engine governing); Load Acceptance Module (LAM); 50/60 Hz Selectable; Under Frequency & Excitation Max Protection; Single Phase or Three Phase Voltage Sensing Optional; Soft Start Voltage Ramping; Normal Rapid Response Time (Option). ③. Sensing Input: Terminal 0-110V = 95~140V; Terminal 0-220V = 170~260V; Terminal 0-380V = 340~520V; Frequency 50/60 Hz selectable. ④. Power Input: Voltage 40~150 VAC 3 phase. ⑤. Output Current: Max. 10A. ⑥. Current Droop: Max. 4% @ P.F.=0.8. ⑦. Voltage Build-up: Residual volts at AVR terminal > 5 VAC. ⑧. Voltage Output: Max. 160 VDC @ 120 VAC. ⑨. External Voltage Adjustment: 10% @ 1 K Ohm 1 watt trimmer. ⑩. Auxiliary Winding: 6~150 VAC (No load rms). ⑪. Response Time: 0.3~1 sec. @ 20% voltage vibration. ⑫. LAM Voltage Droop Rate: 10% & 15% selectable. ⑬. 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. ⑭. AVR Controls Functions: VOLT: Voltage Adjustment; STAB: Stability Adjustment; V/HZ: UFRO Knee Point Set; EXC.MAX: Excitation Current Limit; STAT: Droop Adjustment. ⑮. Dimensions: 203.0 (L) x 153.0 (W) x 60.5 (H) mm. ⑯. Weight: 970g ±2%.