Harmonic Filtering

Harmonic filtering reduces problems and unnecessary costs.

New technologies disrupt the quality of voltage and current (Power Quality). At the same time equipment is more sensitive to voltage fluctuations. Excessive harmonic distortions in the voltage and current can arise as result of increased use of converters, such as LED lighting. Excessive harmonics are a risk to the electrical installation.

An advanced method to reduce harmonic currents and improving the Power Quality is installing a harmonic filter. Harmonic filtering reduces the (harmonic) pollution of the electrical system, thus providing “clean power”. An additional advantage is that this filter has a positive effect on the wear and service life of devices. This saves costs and money.

Improve safety – increase capacity – increase reliability – improve power factor.

Harmonic FIltering / THDU Graph

Active Harmonic Filter

The installation of an Active Harmonic Filter optimizes the Power Quality and reduces harmonics and keep them within the prescribed norm of 5% THDU. The Active Harmonic Filter (AHF) is installed parallel to the installation, which allows harmonic distortions created by multiple devices to be reduced with just one Active Harmonic Filter.

An Active Harmonic Filter analyses errors in the network. It produces an inverse compensation current. The reaction time of an Active Harmonic Filter is very fast, which means that errors can be noted and removed directly, before they can cause any damage.

Principle of Operation AHF

Passive Harmonic Filter

A Passive Harmonic Filter consists of a number of circuits. Each of these filters polluted frequencies from the network. Therefore, the harmonic pollution is reduced to a negligible level and an optimal Power Quality occurs. Passive Harmonic Filters are connected in parallel with the pollution equipment.

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