Search

Premium Membership

Save 15% on Pro Premium Plan with discount code: UX778 (expires on October 31st). Study specialized LV/MV/HV technical articles and papers.

Non-linear loads and overloads

In installations where the neutral is distributed, non-linear loads may cause significant overloads in this conductor due to the presence of the third harmonic. Both the phenomenon and its remedies are explained in this “Cahier Technique”.

The singularities of the third harmonic - Third order harmonic currents in a star-delta transformer
The singularities of the third harmonic (on schematics: Third order harmonic currents in a star-delta transformer)

Current drawn by non-linear loads

Harmonic currents are generated by non-linear loads, ie. loads that draw a current with a different form from the voltage which powers them. The most common loads of this type are those based on rectifier circuits. A typical non-linear load, such as that shown in figure 1, draws a current containing all harmonic orders, both odd and even.

The appearance of the current drawn, which has two different half-waves, and its harmonic spectrum are shown in figures 2 and 3.

AUTHOR: Schneider Electric expert | Jacques SCHONEK

Title:The singularities of the third harmonic
Format:PDF
Size:0.2MB
Pages:20
Download:Right here | Video Courses | Membership | Download Updates
The singularities of the third harmonic
The singularities of the third harmonic

Premium Membership

Get access to premium HV/MV/LV technical articles, advanced electrical engineering guides, papers, and much more! It will help you to shape up your technical skills in your everyday life as an electrical engineer.
More Information

Leave a Comment

Tell us what you're thinking... we care about your opinion! Please keep in mind that comments are moderated and rel="nofollow" is in use. So, please do not use a spammy keyword or a domain as your name, or it will be deleted. Let's have a professional and meaningful conversation instead. Thanks for dropping by!

sixteen  −  8  =  

Learn to Design Power Systems

Learn to design LV/MV/HV power systems through professional video courses. Lifetime access. Apply a 15% discount code EAB77 and enjoy learning!

Subscribe to Newsletter

Subscribe to our Weekly Digest newsletter and receive free updates on new technical articles, video courses and electrical guides.