HARMONIC DISTORTION IN A COMMERCIAL CONSUMER UNIT: A CASE STUDY IN TERESINA - PI

This article presents a case study on harmonic distortion in a Commercial Consumer Unit (UCC), based on measurements carried out in a bakery located in Teresina - PI, with the intention of diagnosing the present harmonic content, evaluating whether it is within acceptable limits and point out the possible causes and consequences of the analyzed harmonic distortion. The measurements were performed using the DMI F200R v2 Extra lite meter, obtaining the distortion parameters and comparing them with the limits established by national and international recommendations. It was found that the harmonic voltage distortion is within the limit regulated by the National Electric Energy Agency (ANEEL), however, the total current distortion levels of all phases exceeded the limits recommended by the Institute of Electrical and Electronic Engineers (IEEE ) Standard 519, mainly phase C, with a strong presence of odd order harmonics, in addition to phase unbalance.