Mitsubishi RHF-B 217-400-50-20-A

The RHF-B 217-400-50-20-A is a passive harmonic filter produced by Mitsubishi, specifically designed for use with a 400V electrical system. Harmonic filters are utilized in electrical systems to mitigate the harmful effects of harmonics that are generated by non-linear loads such as variable frequency drives, rectifiers, and UPS systems. These harmonics can cause numerous issues in a power network, including overheating of electrical equipment, energy loss, and distortion of voltage and current waveforms.

The RHF-B 217-400-50-20-A is designed to be installed in parallel with the non-linear loads, providing a low impedance path for the high-frequency current components generated by these loads. By doing so, it effectively prevents the harmonics from flowing back into the power network, maintaining a cleaner and more stable electrical supply.

The filter consists of a combination of series and parallel resonant circuits, utilizing inductors and capacitors to create a tuned circuit that offers high impedance at the harmonic frequencies, while offering low impedance at the fundamental frequency. This allows it to selectively filter out the harmonic components, while allowing the fundamental frequencies to pass through unhindered.