Abstract
The purpose of this paper is to analyze a number of the basic design and application requirements of main-field circuit breakers forsynchronous machines. The general functions and requirements of main-field circuit breakers are described with typical circuit diagrams. Transient voltages and currents in the excitation circuit are analyzed under normal switching and fault conditions. A basis is suggested for selecting a value of discharge resistance which will bring about the maximum limitation of armature fault damage without creating undue risk of damage to insulation components of the excitation circuit. Equivalent circuits are developed for testing the interrupting performance of the breakers. Suggested constants for interrupting-test circuits are tabulated, as well as values for momentary, short-time, and high-potential tests, over the range of main-field currents and voltages which is anticipated. Interrupting performance tests and a view of a new field breaker for a 250-volt 1,600-ampere circuit are given.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Transactions of the American Institute of Electrical Engineers. Part III: Power Apparatus and Systems
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
