Transcription of CHAPTER – 3 ELECTRICAL PROTECTION SYSTEM
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105 CHAPTER 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 . Accordingly the PROTECTION SYSTEM should be dependable (operate when required), secure (not operate unnecessarily), selective (only the minimum number of devices should operate) and as fast as required.
3.1.7 Fault Data Protective relay systems measure the current, voltage, or a combination of current and voltage during fault conditions. Fault current magnitude, and the associated change in voltage, varies with the type of fault and with the location of the fault with respect to the sensing devices. GENERATOR G PROTECTION TRANSFORMER ...
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