By Topic

Short-circuit currents in low-voltage systems: Joint sections committee on air circuit breakers of NEMA

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
$31 $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

ONE of the aims of the Joint Sections Committee on Air Circuit Breakers of the National Electrical Manufacturers Association (NEMA) is to propose standards of satisfactory performance for low-voltage (lv) air circuit breakers under short-circuit conditions. To determine the requirements for satisfactory circuit-breaker short-circuit performance, it is necessary to obtain information about the various short-circuit conditions that exist in electric power systems where the circuit breakers may be installed. Sponsored by the NEMA Joint Sections Committee, studies have been made to permit the maximum probable short-circuit duties to be determined at nearly any point in a wide range of low-voltage electric power systems. This paper gives the basic assumptions and procedures used in the calculations and presents the results as a series of curves that can be used to determine short-circuit duties in lv systems.

Published in:

American Institute of Electrical Engineers, Part II: Applications and Industry, Transactions of the  (Volume:74 ,  Issue: 5 )