What is the function of a harmonic filter in protection systems?

A harmonic filter serves a crucial role in enhancing the overall power quality of electrical systems by specifically targeting and reducing harmonic distortion. Harmonics are voltage or current waveforms that deviate from the fundamental frequency, often caused by non-linear loads like variable frequency drives, LED lighting, and other electronic devices.

When these harmonics are present in a system, they can lead to various issues, including overheating of equipment, increased losses, and interference with sensitive electronics. By implementing a harmonic filter, these distortions are minimized, leading to cleaner electrical signals, which contributes to improved efficiency and reliability of the entire electrical system. This is vital for ensuring that equipment operates within its specified parameters and prolonging its operational lifespan.

The other options do not accurately describe the function of harmonic filters. Enhancing voltage levels refers more to voltage regulation devices, such as transformers or voltage stabilizers. The elimination of physical wear on cables generally relates to better thermal management or the protection of electrical components, not harmonic filtering. Lastly, detecting unauthorized access pertains to security systems and not to the electrical performance or quality aspects of harmonic filtering.