CHAPTER – 3 ELECTRICAL PROTECTION SYSTEM

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105CHAPTER 3 ELECTRICAL PROTECTION SYSTEM DESIGN CONSIDERATION PROTECTION SYSTEM adopted for securing PROTECTION and the PROTECTION scheme the coordinated arrangement of relays and accessories is discussed for the following elements of power SYSTEM . i) Hydro Generators ii) Generator Transformers iii) H. V. Bus bars iv) Line PROTECTION and Islanding Primary function of the protective SYSTEM is to detect and isolate all failed or faulted components as quickly as possible, thereby minimizing the disruption to the remainder of the electric SYSTEM .

Two forms of back up protection are provided. These are protection failure or circuit breaker failure. Best form of back up protection for any system is one in which both ac and dc supplies are completely separate from main protection. Economic consideration determines the extent to which back up protection is provided. 3.1.7 Fault Data

  Protection, Main, Main protection