The REVCON Harmonic Filter – RHF is a high efficient two-stage Harmonic Filter used to avoid mains distortion caused by non-linear loads such as variable frequency drives.

Ideally all loads and sources have a pure sinusoidal current waveform. But unfortunately the true waveform of most equipment is very different. Nonlinear loads like for example the diode input bridge of a 6-pulse drive are causing a distortion of the mains voltage. This distortion typically evaluated by the Total Harmonic Distortion THD, evaluates frequencies from the 2nd up to the 50th harmonic. In a 50Hz Network this is the area between 100Hz and 2,5kHz.

The impact of the voltage distortion is diverse, and the most typical effect is overheat of transformer and PFC applications (Capacitor banks). An underestimated impact of harmonic distortion is the significantly reduced lifetime expectation of electrical and mechanical equipment.

The Revcon Harmonic Filter reduces the THDi of nonlinear loads and sources to significantly below 5% (optional 10%) even under realistic circumstances including imbalance and pre-distortion. This is necessary to reach various standards and recommendations, such as IEEE 519-2014. Typically simple passive harmonic filters are tuned to 250Hz and therefore focus mainly on the 5th harmonic. Due to its unique filter circuit, the RHF works like a bandwidth filter and reduces all harmonics up to ~60. At last but least: This patented filter circuit reach an efficiency of up to 99.5% and therefore the produced power losses are up to 75% less than those produced by comparable solutions.

All our filters are available for all low voltage 3-phase supplies and covers power from 1kW up to 800kW, with an open end in parallel setup! Looking forward to meet you at our Stand!