DocumentCode
1170480
Title
Proposed New Breaker Ratings and Their Efect on Application for Industrial Systems
Author
Knable, A.H.
Volume
80
Issue
3
fYear
1961
fDate
4/1/1961 12:00:00 AM
Firstpage
957
Lastpage
963
Abstract
Simplified breaker application to industrial systems is proposed. Multiplier curves and tables provide the answer. These curves were developed (1) by superimposing calculated induction motor fault currents on synchronous-machine-source fault currents, and (2) by adding "k" factor curves which are an indication of the momentary limits of the breaker. Built-in asymmetrical capability allows breakers to be applied to industrial systems independently of breaker rated interrupting time. One symmetrical-current (E/X) calculation is adequate for breaker application.
Keywords
Circuit breakers; Circuit faults; Fault currents; Impedance; Information analysis; Protection; Protective relaying; Standby generators; Transmission lines; Voltage;
fLanguage
English
Journal_Title
Power Apparatus and Systems, Part III. Transactions of the American Institute of Electrical Engineers
Publisher
ieee
ISSN
0097-2460
Type
jour
DOI
10.1109/AIEEPAS.1961.4501182
Filename
4501182
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