R438 Leroy Somer AVR 1.brushless and single phase 2.1 year warranty and fastest delivery 3.3days delivery ... /60 Hz Selectable Under Frequency & Exc. Max Protection Single Phase Or Three Phase Voltage Sensing Optional Soft Start Voltage Ramping Normal Rapid Response ... =340-520V Frequency: 50-60Hz Voltage input: 40-50VAC, 3 phase Harmpnic auxiliary winding :6-150VAC (no-load rms) Output: Voltage ...