EN 61000-3-2 is a standard that deals with the limitation of harmonic currents that are drawn by equipment connected to public low-voltage supply systems. It defines the maximum permissible levels of harmonic currents in the frequency range from 0 Hz (DC) up to and including the 2 kHz, which is at the limit between the electrical power quality and electromagnetic compatibility fields. This standard was developed by the International Electrotechnical Commission (IEC), a global organization responsible for setting international standards in the electrical and electronic industries.
Why is EN 61000-3-2 harmonic important?
Harmonic currents are electronic distortions or variations of the fundamental current waveform. These harmonics can cause serious issues in power systems, such as voltage distortion, increased losses in the power grid, and overall reduced power quality. The increasing use of non-linear loads, such as computers, electronic devices, and energy-efficient lighting, has led to a significant increase in harmonic distortion. The EN 61000-3-2 standard aims to regulate and limit these harmonics to ensure the smooth functioning of the electrical power system and prevent adverse effects on other connected equipment and the grid itself.
Compliance and testing
In order to ensure compliance with EN 61000-3-2, manufacturers of electrical equipment need to perform specific tests to determine the harmonic emissions of their products. These tests involve measuring the level of harmonic currents generated by the equipment when connected to the power grid. The results are then compared against the limits set forth in the standard. Compliance with EN 61000-3-2 is mandatory in many countries, and electrical equipment must bear the CE marking to demonstrate its conformity.
The future of harmonic mitigation
As harmonic distortion continues to be a significant concern in power systems, there is a growing focus on developing new technologies and solutions for harmonic mitigation. Active filters, passive filters, and improved power electronic converters are some of the methods being explored to reduce harmonic content. Additionally, there is an increasing emphasis on educating consumers about the importance of using compliant equipment and implementing good power management practices to minimize harmonic distortion. With continued research and development, it is expected that harmonics will be better controlled, leading to more efficient and reliable power systems in the future.
Nina She