REVCON Harmonic Filters – Active, Hybrid & Passive Solutions
What Are Harmonic Filters and Why Are They Important?
Understanding Harmonic Distortion (THD)
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 the diode input bridge of a 6-pulse drive—cause distortion of the mains voltage. This distortion, typically evaluated by the Total Harmonic Distortion (THD), includes frequencies from the 2nd up to the 40th harmonic. In a 50Hz network, this covers the range between 100Hz and 2kHz.
Impact of Harmonic Distortion on Equipment
The impact of voltage distortion is diverse. The most typical effects include overheating of transformers and PFC applications (capacitor banks). A commonly underestimated consequence is the significantly reduced lifetime of both electrical and mechanical equipment.
RHF Filter Capabilities and Applications
Total Harmonic Distortion (THDi) Reduction Performance
The Revcon Harmonic Filter (RHF) mitigates harmonic distortion caused by nonlinear loads and sources. Unlike filters tuned to a specific frequency, RHF acts as a bandwidth filter, reducing all frequencies up to the 50th harmonic. It brings Total Harmonic Distortion of the current (THDi) to levels significantly below 5%. This performance is essential for meeting standards like IEEE 519-2014, which are becoming more widely adopted.
Industry Applications
Below is an application matrix comparing the suitability of different RHF filter models:
| Application | RHF-8P <8% THDi | RHF-5P <5% THDi | RHF-Hybrid ~1% THDi | RHF-8Pctive Scalable |
|---|---|---|---|---|
| Variable 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 |
*Note: Some applications may depend on site-specific conditions or compliance levels.
Why Choose REVCON Harmonic Filters?
Broad Frequency Bandwidth Mitigation (Up to 50th Harmonic)
REVCON RHF filters aren’t fixed to one harmonic; they reduce a wide range of frequencies, making them highly versatile across industries.
Energy Efficiency and Equipment Longevity
By eliminating harmonic distortion, these filters prevent overheating and premature failure of transformers and other critical components.
Compliance with Global Power Quality Standards
RHF filters help meet important international standards like IEEE 519-2014, ensuring regulatory compliance and smoother energy management.
We are currently working on bringing you the full version of our site. Some of the functionalities may be limited at this time.
If you have any questions about the services we offer don’t hesitate call us at +1 (877) 236-8337.