A: The output waveform of the inverter is not a sine wave, but a PWM pulse wave. The output reactor can reduce the output harmonic, reduce the instantaneous high voltage generated when the IGBT works, and reduce the adverse effect on the insulation of the motor. The output reactor also can reduce the capacitance effect of the long cable at the output end of the inverter, avoid overcurrent of the inverter and increase the transmission distance. It is recommended that the output cable length exceeds 50m, select the suitable output reactor refer to operation manual.