When it turns out that, after a profound analysis, that the harmonic values are relatively high and that the harmonics are spread over in several frequencies (H5 - H7 - H11 - ...) , it is suitable to choose for an ACTIVE FILTER.
An active filter can also be interesting when there are important fluctuations in consumption within the electrical installation.
An active filter will reduce the harmonics upstream.
First there is a measurement in 3 phases (via 3 current transformers).
In this way the filter measures the pollution that comes from the user(s).
The filter will inject the reverse harmonic in each rank and will neutralize in that way all harmonics in the network. Consequently the current source will be discharged and the user(s) receive a more stable voltage.
Comar Benelux can be your partner in choosing and installing an active filter, appropriate for networks from 400 Volt to 690 Volt.
We can offer a large scale of filters. These filters can reduce harmonics from 30A to 300A