http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (xvii, 404 pages) : illustrations
Microprocessor-based digital protection relays seem to be dominating all other types of protection relays. This book explains how to choose digital relays correctly, how to ensure their correct use, and how to avoid multiple problems. Focusing on solutions, the text describes specific technical problems associated with digital relays and suggests ways to solve them. It also covers the construction of functional assemblies of real relays existing in the market, drawbacks and problems of digital relays, and the danger of deliberate electromagnetic effect onto digital relays. Alternative (non-mic.
1. Basic components of digital protective relays -- 2. Design and functional modules of digital protective relays -- 3. Problems with the reliability of digital protective relays -- 4. Logic inputs in digital protective relays -- 5. Problems with output electromechanical relays -- 6. Problems with external power supplies -- 7. Testing digital protective relays -- 8. Electromagnetic intrusions on digital protective relays -- 9. Alternative (Nondigital) protective relays -- 10. Problems with international standards -- 11. New concepts for DPR design.
Includes bibliographical references and index.