By Topic

Understanding Asymmetry

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Craig N. Hartmane ; Westinghouse Electric Corporation, 3900 S. Wadsworth Blvd., Lakewood, CO 80235.

When calculated fault levels lie very close to circuit breaker interrupting ratings, a thorough evaluation of the asymmetrical currents involved may become the deciding factor between breakers of varied capabilities and costs. The increasing emphasis on efficiency tends to exacerbate concerns in this area. An attempt is made to help the reader visualize the events of the first few cycles after fault inception as well as providing a rigorous quantitative analysis of the magnitude of currents involved. Equations for sizing both molded-case and power circuit breakers are developed.

Published in:

IEEE Transactions on Industry Applications  (Volume:IA-21 ,  Issue: 4 )