Technological Innovation

What is BS EN ISO 50493:2016?

BS EN ISO 50493:2016 is an international standard that sets out the requirements for a technical specification in the field of harmonic performance and measurement of electrical grids. It was developed by the International Organization for Standardization (ISO) in collaboration with the European Committee for Electrotechnical Standardization (CENELEC).

Understanding Harmonics

Harmonics are distortions in an electrical system that occur when non-linear loads, such as computers, televisions, or variable-speed drives, are connected to the grid. These loads draw currents that do not have a sinusoidal waveform, resulting in voltage and current waveforms that deviate from the ideal shape.

The presence of harmonics can cause various issues, including overheating of electrical equipment, increased energy consumption, and electromagnetic interference. Therefore, it is important to measure and control harmonics to ensure the efficient and reliable operation of electrical grids.

The Importance of BS EN ISO 50493:2016

BS EN ISO 50493:2016 provides guidelines for testing laboratories and manufacturers to assess the harmonic performance of equipment and ensure compliance with international standards. It specifies the test conditions, measurement procedures, and calculation methods to accurately determine the harmonic emissions and immunity levels of devices.

By adhering to BS EN ISO 50493:2016, manufacturers can design and produce electrical equipment that meets the required harmonic performance criteria. This helps in minimizing the potential adverse effects of harmonics on the electrical grid and maintaining power quality.


Harmonic distortion is a significant concern in modern electrical systems. BS EN ISO 50493:2016 plays a crucial role in addressing these concerns by providing a technical specification for the measurement and evaluation of harmonic performance. Compliance with this standard ensures that electrical equipment operates efficiently, minimizes energy consumption, and reduces the risk of interference with other devices on the grid.

By following the guidelines outlined in BS EN ISO 50493:2016, manufacturers and testing laboratories can contribute to the overall improvement of power quality and the reliable operation of electrical grids.


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