Revcon Harmonic Filters

Application

RHF-8P

<8% THDi

RHF-5P

<5% THDi

RHF-Hybrid

~1% THDi

RHF-8Pctive

Scalable

Vaiable Frequency Drives – VFD

Yes

Yes

Yes

Yes

Water and wastewater treatment

Yes

Yes

Yes

Yes

HVAC

Yes

Yes

Yes

Yes

Pumps and Fans (VFD)

Yes

Yes

Yes

Yes

Industrial/ Factory Process (VFD)

Yes

Yes

Yes

Yes

DC charger

Yes*

Yes*

Yes

Yes

Buildings

Yes

Yes

Yes

Yes

Data Center (power supply)

No

No

Yes

Yes

IEEE 519-2014 requirement

Yes*

Yes

Yes

Yes

Marine

Yes

Yes

No

No

IEEE 519-2014 specified application

Yes

Yes

Yes

Yes

Electronically comutated / EC Motor

No

No

Yes

Yes

Non symetrical Load

No

No

No

Yes

Symetrical load multiple VFD

Yes

Yes

Yes

Yes

Symetrical load multiple equimpment

No

No

No

Yes

Displacement factor correction („pf“)

No

No

No

Yes

Unbalance compensation

No

No

No

Yes

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 40th harmonic. In a 50Hz Network this is the area between 100Hz and 2kHz.

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

The Revcon Harmonic Filter (RHF) avoids the harmonic distortion of nonlinear loads and sources. The filter is not tuned to a specific frequency, but works like a bandwidth filter, reducing all frequencies up to the 50th harmonic. The RHF filter reduces the Total Harmonic Distortion of the current (THDi) to a level significantly below 5%. This is necessary to reach various standards, for e.g. IEEE 519-2014, who are getting more and more common.