What is EN 61000-3-2 Harmonic?

EN61000-3-2 is an international standard that specifies the limits for harmonics generated by electrical and electronic equipment connected to low-voltage power supply networks. This standard is particularly important in ensuring the quality of electric power, minimizing interference with other electrical equipment, and maintaining a stable and efficient power grid.

The Importance of EN61000-3-2 Harmonic Standard

The proliferation of electronic devices and the increasing demand for electricity have led to a significant increase in harmonic distortions in power systems. Harmonics are voltages or currents that are multiples of the fundamental frequency and can cause various problems, such as overheating of equipment, voltage fluctuations, and interference in communication systems. The EN61000-3-2 standard sets limits on these harmonics to ensure the smooth operation of both the electricity grid and the connected electrical and electronic equipment.

Compliance and Testing for EN61000-3-2 Harmonic

To ensure compliance with the EN61000-3-2 standard, manufacturers of electrical and electronic equipment must perform harmonic testing. This involves measuring the harmonic current emissions produced by their products and comparing them against the specified limits. Harmonic analyzers or similar devices are used to measure the power quality parameters and identify any excessive harmonic content. Non-compliant equipment may cause issues such as malfunctions, damage to electrical infrastructure, or disruptions to other nearby devices. Therefore, compliance with the EN61000-3-2 standard is crucial for manufacturers to market their products worldwide.

Harmonic Mitigation Techniques

There are several techniques available to mitigate harmonics in power systems. Passive filters, such as harmonic traps and passive shunt filters, can reduce harmonic distortion by redirecting or attenuating the harmonic currents. Active filters utilize electronic devices to cancel out the harmonics in real-time. Another popular technique is the use of power electronic converters that perform active filtering and reduce the harmonic content at the source. The choice of mitigation technique depends on factors such as the type of load, power system configuration, and desired cost-effectiveness.