Contents: 1. Protective relaying fundamentals. 2. Current-based relaying scheme. 3. Distance relaying scheme for transmission line. 4. Carrier aided distance scheme for transmission lines. 5. Generator protection. 6. Transformer protection. 7. Protection of induction motor. 8. Busbar protection. 9. Current and potential transformers for relaying schemes. 10. Protection against transients and surges. 11. Auto-reclosing and synchronizing. 12. System response to severe upsets. 13. Theory of arc interruption in circuit breaker. 14. Types of circuit breakers and their testing. 15. Testing, commissioning and maintenance of relays. 16. Recent developments in protective relays. 17. PSCAD and its application in power system. 18. Smart grid technologies and applications. 19. Symmetrical and unsymmetrical faults in power systems. 20. Basic concept and application of controlled switching. Protection and Switchgear is designed as a textbook for undergraduate students of electrical and electronics engineering. The book aims at introducing students to the various abnormal operating conditions in power systems, system protection schemes, and the phenomenon of current interruption. With the help of detailed relay and circuit diagrams, the book describes the protection principles of each element of the power system network, including relay design and settings. It also covers digital/ numerical relaying schemes, theories of the circuit breaking phenomenon, and the construction and working of switchgears.