AVR Voltage Regulator R448R448 Permanent Magnet Generator or A.R.E.P or Auxiliary Winding type generator voltage regulator is a compatible replacement for Leroy Somer R448, R449, R438, and AEM110RE016 and also Olympian FG Wilson 922 124.Voltage Regulation < 0.5 percent Load Acceptance Module (LAM)50 or 60 Hz SelectableUnder Frequency and Exc. Max ProtectionSingle Phase Or Three Phase Voltage Sensing OptionalSoft Start Voltage RampingNormal Rapid Response Time (Option)Sensing InputTerminal 0-110V = 95-140VTerminal 0-220V = 170-260VTerminal 0-380V = 340-520VFrequency 50 or 60 Hz selectablePower InputVoltage 40-150 VAC 3 phaseOutput CurrentMax. 10ACurrent DroopMax. 4 percent P.F.=0.8Voltage Regulation< 0.5 percent (with 4 percent engine governing)Voltage Build-upResidual volts at AVR terminal > 5 VACVoltage OutputMax. 160 VDC 120 VACExternal Voltage Adjustment10 percent 1 K Ohm 1 watt trimmerAuxiliary Winding6-150 VAC (No load rms)Response Time0.3-1 sec. 20 percent voltage vibrationLAM Voltage Droop Rate10 percent and 15 percent selectableEnvironmentOperating Temperature : -40-60 CStorage Temperature : -40-85 CRelative Humidity : Maximum 95 percent Vibration : 1.5G 5-30 Hz or 5.0G 30-500 HzAVR Controls FunctionsVOLT : Voltage AdjustmentSTAB : Stability AdjustmentV or HZ : UFRO Knee Point SetEXC.MAX : Excitation Current LimitSTAT : Droop AdjustmentDimensions203.0 (L) x 153.0 (W) x 60.5 (H) mmWeight970g 2 percent