Most electrical transmission and distribution systems have been designed to operate at the fundamental frequency only and the presence of non-linear loads often stress distribution equipment and can disrupt normal power supply operation.
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Why Improve My Harmonics?
The harmonic components of order 3 (150 Hz) in three-phase systems become homopolar, for instance: They converge on the neutral conductor and overload it. In the absence of the neutral, circulating currents may occur inside the three-phase appliances, connected in triangular form, generating dangerous overloads in this situation as well.
In single-phase systems, personal computers are classic examples of heavily-distorted loads with a high content of 3rd order harmonics which, as described above, will have an effect on the neutral. The conductor must, therefore, be sized appropriately, otherwise overheating will occur, thus reducing its life and quality.
They can cause failure of PLC, DCS, computer, and other sensitive low voltage power supplies.
Harmonic currents can be improved by installing Active Harmonic Filtering (AHF) equipment. To learn more about our Active Harmonic Filters, click on the products below or contact us to receive the best assistance from our Technical Sales Engineers.