Title :
A 500,000-Kva 7.5-Kv Air Circuit Breaker for Steel-Mill Service
Author_Institution :
Section engineer in the air-circuit-breaker section at Westinghouse Electric and Manufacturing Company, East Pittsburgh, Pa.
fDate :
5/1/1944 12:00:00 AM
Abstract :
A self-contained air circuit breaker for a rating of 500,000 kva at 7.5 kv has long been regarded as a desirable goal. Recent developments in magnetic-type air circuit breakers have indicated the economic feasibility of similar designs for ratings higher than previously attained. The development of a 500,000-kva 7,500-volt magnetic air circuit breaker is described. A description of the breaker and the peculiar design problems are presented. Test data with oscillograms are shown.
Keywords :
Circuit breakers; Circuit testing; Contactors; Insulation; Magnetic materials; Milling machines; Petroleum; Power generation economics; Switching circuits; Voltage;
Journal_Title :
American Institute of Electrical Engineers, Transactions of the
DOI :
10.1109/T-AIEE.1944.5058930
