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The selectivity of relay protection refers to

Lecture 4 | PDF Sensitivity is the ability to detect small faults, and selectivity is the ability to discriminate faults within the relay's zone of protect.

The selectivity of relay protection refers to

Module 1 : Fundamentals of Power System Protection

A relay is said to be dependable if it trips only when it is expected to trip. This happens either when the fault is in it''s primary jurisdiction or when it is called upon to provide the back-up protection.

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