... state. With PWM invert technology, inverter power outputs pure sine wave, applying to capacitive, inductive and nonlinear mixed-load,with ... /415VAC 3-phase 4-wire ±1%Frequency50/60HZ±1%Wave formPure sine waveTHD≤3%Protection functionoverload,short circuit,low battery ... loads) Then turn off; 150% overload instant off.Faultthe machine switch to bypassLow battery voltage1 emergency alarm for 1 second, the ...