What is IEC 61000-4-15:2019?

IEC 61000-4-15:2019 is an international standard that addresses the measurement and assessment of flicker emitted by lighting equipment. Flicker refers to the rapid and repeated changes in luminous intensity, which can lead to visual discomfort, eyestrain, and even epilepsy seizures. This technical article aims to provide an in-depth understanding of the key aspects of IEC 61000-4-15:2019, including its scope, measurement methods, and requirements.

Scope of IEC 61000-4-15:2019

The standard specifically focuses on the assessment of flicker in lighting equipment within the frequency range of typically 0.5 Hz to 150 kHz. It provides guidelines for measuring flicker magnitude and determining its severity in both incandescent and non-incandescent light sources. Additionally, the standard offers recommendations for evaluating the impact of flicker on different applications such as visual perception, performance of tasks, and physiological effects on humans.

Measurement Methods

IEC 61000-4-15:2019 outlines several measurement techniques to evaluate flicker in lighting equipment. The most common method is the flickermeter, a device that measures and quantifies flicker levels based on standardized algorithms. Flickermeters analyze the voltage waveform generated by the lighting source and calculate flicker parameters such as short-term flicker severity (Pst), long-term flicker severity (Plt), and modulation depth (Md). These measurements enable the classification of flicker into acceptable or unacceptable levels according to predefined limits.

Requirements and Compliance

The standard sets forth requirements for lighting equipment manufacturers to ensure compliance with acceptable flicker levels. It specifies maximum limits for Pst, Plt, and Md values, depending on the application and type of lighting source. Compliance with IEC 61000-4-15:2019 is essential to improve the quality of lighting products, minimize potential health risks, and guarantee user comfort. Furthermore, adherence to the standard reduces compatibility issues between different lighting installations and enhances the overall reliability and performance of lighting systems.