DocumentCode :
1453357
Title :
Rating and testing of power circuit breakers
Author :
Clair, H. P. St. ; Naef, Otto
Author_Institution :
American Gas and Electric Service Corporation, New York, N. Y.
Volume :
71
Issue :
6
fYear :
1952
fDate :
6/1/1952 12:00:00 AM
Firstpage :
504
Lastpage :
504
Abstract :
IN THE PAST FEW YEARS, with field testing continuing at ever-increasing magnitudes of short-circuit capacity, the controversy over the symmetrical versus the rms basis of rating has taken on more significance. The European claim is that American circuit-breaker ratings must be discounted by a factor of two-thirds, and American manufacturers claim a rating based on the highest possible single-loop offset wave brought about by synchronized pretripping. Although these high American ratings are sanctioned by the American Standards Association, there is no proof that a circuit breaker thus rated is capable of interrupting a symmetrical current of the same rms value. Yet, the definition of rated interrupting current as the highest rms current, including the d-c component, which the circuit breaker shall be required to interrupt, indirectly implies that the two ratings shall be equal.
Keywords :
Circuit breakers; Circuit faults; Europe; Interrupters; Standards; Synchronization; Testing;
fLanguage :
English
Journal_Title :
Electrical Engineering
Publisher :
ieee
ISSN :
0095-9197
Type :
jour
DOI :
10.1109/EE.1952.6437527
Filename :
6437527
Link To Document :
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