Selectivity Analysis of Relay Protection

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Protection coordination study, discrimination study, selectivity study or relay setting study helps to select and arrive at the protection setting of various protection devices in the Power system viz. The protective philosophy is fundamentally grounded on the understanding that faults or abnormal operating. Selective short-circuit protection can be achieved in different ways, such as: Time-graded protection Time- and current-graded protection A straightforward way of obtaining selective protection is to use time grading. ETAP Star™ overcurrent device protection and coordination evaluation software provides an intuitive and logical approach to Time-Current Characteristic curve selectivity analysis.

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doi: 10.1007/978-3-319-20919-7_3

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