... 3 Phase UPS cost effective 2.Pure sine wave,suitable for all kinds of loads,especially for 3.inductive loads Features:3 phase ... levelCharging current can be reset by end userLow-frequency circuit with strong overload abilitySmart charging mode: forced ... voltage, frequency, battery charging, battery capacity, load capacity, AVR/battery mode, error, overload ProtectionUtility Modeoutput high/low voltage, ...