AC input Reactor

A three-phase AC input reactor is placed between the power source and the frequency converter. It limits current surges caused by sudden voltage changes and operational overvoltages, effectively protecting the frequency converter and improving its power factor while suppressing harmonic currents entering the power grid from the converter. Product features include reducing motor noise and eddy current losses, protecting the power switching devices inside the converter, and ensuring normal operation under specific conditions such as significant interference or overvoltage from the power supply, and power supply phase voltage imbalance of less than 1.8% of the rated voltage on lines with extremely low impedance (where the power transformer exceeds the rated value of the frequency converter by more than ten times).

Usage: During operation, frequency converters and speed regulators are frequently subjected to surges in current and voltage, which can severely damage their performance and lifespan. Therefore, an input reactor is installed in front of them to suppress surge voltage and current, protect the frequency converter and speed regulator, extend their lifespan, and prevent harmonic interference. Since frequency converters and speed regulators adjust speed by changing frequency, high-order harmonics and waveform distortions often occur during speed adjustment, affecting the normal use of the equipment. Hence, an input reactor is necessary at the input end to improve the power factor of the frequency converter, suppress harmonic currents, filter out harmonic voltages and currents, and enhance power grid quality.