What is the scope of EN 61000-3-2

EN 61000-3-2 is a European standard that defines the limits for harmonic current emissions from equipment that are connected to public low-voltage networks. This standard plays a crucial role in ensuring the quality of electrical power supply and reducing interference caused by harmonics. In this article, we will take an in-depth look at the scope of EN 61000-3-2 and its importance in maintaining power quality.

The Purpose of EN 61000-3-2

The main purpose of EN 61000-3-2 is to limit the amount of harmonic currents injected into the public low-voltage grid. Harmonic currents are integer multiples of the fundamental frequency (50Hz or 60Hz), and they can cause various problems such as voltage distortion, overheating of electrical equipment, and increased energy losses in the distribution network. By defining the limits for harmonic current emissions, this standard ensures that devices connected to the grid do not negatively impact the power quality.

Applicability and Compliance

EN 61000-3-2 applies to a wide range of electrical and electronic equipment, from household appliances to industrial machinery. However, not all equipment is subject to the same compliance requirements. The standard categorizes equipment into different classes and sets specific limits for each class. Class A equipment refers to devices intended for professional use, while Class B equipment includes devices for residential and commercial applications. Compliance with this standard is typically demonstrated through measurements carried out on the equipment's input terminals.

Harmonic Current Limits

EN 61000-3-2 specifies the maximum allowable levels of harmonic currents that equipment can inject into the grid. These limits depend on the type of equipment and the total power consumed. The standard defines different levels for both voltage and current harmonic distortion, ensuring that the power quality remains within acceptable limits. Equipment manufacturers must ensure their products comply with these limits to avoid causing detrimental effects on the grid and other connected devices.

In conclusion, EN 61000-3-2 is a vital standard that sets the scope for limiting harmonic currents emitted by equipment connected to low-voltage networks. By adhering to this standard, electrical and electronic devices can minimize their impact on power quality, reduce interference, and ensure the efficient operation of the overall electrical system.