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%Load Acceptance Module (LAM)50/60 Hz SelectableUnder Frequency & 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 50/60 Hz selectablePower InputVoltage 40~150 VAC 3 phaseOutput CurrentMax. 10ACurrent DroopMax. 4% @ P.F.=0.8Voltage Regulation< 0.5% (with 4% engine governing)Voltage Build-upResidual volts at AVR terminal > 5 VACVoltage OutputMax. 160 VDC @ 120 VACExternal Voltage Adjustment10% @ 1 K Ohm 1 watt trimmerAuxiliary Winding6~150 VAC (No load rms)Response Time0.3~1 sec. @ 20% voltage vibrationLAM Voltage Droop Rate10% & 15% selectableEnvironmentOperating Temperature : -40~60 CStorage Temperature : -40~85 CRelative Humidity : Maximum 95%Vibration : 1.5G @ 5~30 Hz / 5.0G @ 30~500 HzAVR Controls FunctionsVOLT : Voltage AdjustmentSTAB : Stability AdjustmentV/HZ : UFRO Knee Point SetEXC.MAX : Excitation Current LimitSTAT : Droop AdjustmentDimensions203.0 (L) x 153.0 (W) x 60.5 (H) mmWeight970g 2%