Standard Decrement Curves
- 1 June 1932
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. 51 (2) , 353-361
- https://doi.org/10.1109/T-AIEE.1932.5056075
Abstract
For circuit breaker and relay application, it is frequently necessary to determine the decrement in power system short-circuit currents. For this purpose certain ``standard decrement curves'' approved by the National Electrical Manufacturers Association have been in general use. The original curves appeared in 1918 and a revised set was prepared in 1923. New decrement curves given in the present paper supersede those formerly in use. The paper also includes a discussion of the need for new curves, the underlying assumptions upon which they are based, the method of application and their limitations.Keywords
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