NDLI: Metal-Clad 4,160-Volt 350-Mva Switchgear with Symmetrical Ratings

Content Provider	IEEE Xplore Digital Library
Author	Rietz, E. B. Perkins, G. O. Carter, W. A.
Copyright Year	1952
Description	Air break power circuit breakers of the magnetic type have been used for 2,300-and 4,160-volt service for almost the last 20 years. These breakers have been built in interrupting ratings from 50 to 250 mva (megavolt-amperes). Within the last 2 years a need has been established for breakers of higher interrupting and continuous current-carrying capacity. The need is attributable to the larger sized transformers used for distribution substations and for auxiliary power for modern generating stations. These require continuous current ratings up to 3,000 amperes and interrupting ratings up to 350 mva. The breakers and switchgear described in this paper were developed to meet this requirement. Because of industry interest in the basis of rating power circuit breakers, design tests were made to demonstrate that these breakers would meet the 350-mva interrupting rating on a symmetrical basis and with a 5-cycle interrupting time rating.
Starting Page	1397
Ending Page	1402
Page Count	6
File Size	2861816
File Format	PDF
ISSN	00972460
Volume Number	76
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1957-04-01
Publisher Place	New York, U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switchgear Circuit breakers Transformers Associate members Substations Power generation Electrical equipment industry Circuit testing Manufacturing industries Gears
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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