54 – Does a delta-wye transformer cancel all harmonics? 

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To answer whether a delta-wye transformer will cancel all the harmonics, in short in will not. The delta-wye will recirculate the triplen harmonics back to the load. But if you utilized these transformers in combination with other transformers to create phase shifting, you can do some cancellation. Watch this video to learn more about what happens with delta-wye transformers. (Other video referenced - How can I eliminate or cancel harmonics with phase shifting transformers? https://youtu.be/0GfpxuNSy1g?si=WkJ8CqJ-lJAc3RnR ) Harmonic FAQ Series What are harmonics and where do harmonics come from? Harmonics are generated from non-linear loads that typically include power electronics such as variable frequency drives (VFD) and LED lights. Current harmonics cause excess heating of transformers and cables, and damage electrical equipment. Harmonics can also cause voltage distortion, often resulting in the mis operation of equipment during critical applications. Calculating harmonics and measuring harmonics are critical steps in selecting the best harmonic solution to reduce the total harmonic distortion or THD on a power system to comply with the IEEE-519 standard. Power factor correction and harmonic resonance should also be considered. Eaton’s Harmonic Frequently Asked Question’s FAQs collection of videos hosted by Dan Carnovale can help individuals from all different levels of education understand what harmonics are and explain many different solutions for mitigating harmonics on an electrical power system. Dan Carnovale P.E. has decades of experience in power quality and harmonics and is a recognized electrical industry expert in power quality and power systems. He is the creator and director of Eaton’s Power Systems Experience Centers (PSEC) in Pittsburgh PA and Houston TX. The PSECs provide visitors with live demonstrations of hands-on power quality and harmonic situations and solutions that can be seen first-hand in the Power Quality Lab. Visit Eaton’s harmonics knowledge website featuring harmonic solutions, harmonic calculators, access to white papers, and more: https://www.eaton.com/harmonics See our entire harmonics FAQs playlists: https://www.youtube.com/watch?v=U36ywxWHIy8&list=PL8XobqCtN9Z8maXVw0kYDLjmhBO275-bE For an educational overview of harmonics in person, visit one of Eaton’s Power Systems Experience Centers: http://eaton.com/experience #harmonics #powerquality #electricalengineering #electricalsafety #eatonexperience #experiencecenter