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Protective Relaying Theory and Applications Walter A. Elmore
Publisher: CRC Press

.Derive the equation for torque developed in an induction relay. Explain its function in an electrical system. 10.Write the theory of induction relay torque. .Explain Explain with neat diagram the application of Merz price circulating current principle for the protection of alternator. These and other considerations require careful thought to obtain relay characteristics best-suited to the particular application. PART-B *What is a protective relay? T.S.M Rao,“Power System Protection: Static Relays with Microprocessor Applications” Tata Macgraw Hill”. .Describe the construction and working of a Buchholz relay. Warringtaon , “ Protective Relays- Their Theory and Practice, Vol. (Chapter 5, Protective Relaying Theory and Applications, book edited by Walt Elmore, ABB Inc., published by Marcel Dekker Inc) 9. *Explain the functional requirements of protective relay. About the book: Since 1966, the Network Protection and Automation Guide (formerly the Protective Relays Application Guide) has been the definitive reference textbook for protection engineers and technicians. Overcurrent protection is the simplest and least expensive form of fault protection that can be placed on transmission lines. "Although this work is aimed at an electrical engineering audience, the language is clear, the math isn't daunting, and the many diagrams are a great aid to understanding. The operating Nondirectional overcurrent relay schemes find limited application on transmission lines.