... 3.wide voltage stabilizing range 4.high efficiency Frequency converter/ac power source Use of stand-alone, no ... Voltage,current, frequency, active power, power factors,high precision and Strong anti-interference abilityFast transient response, 100% load/unload ... over voltage,over current,over load,over temperature protection and alarmfunctionsOutput capacity:450kVAOutput voltage:low:0-150V adjustable; ...