Directional Over-Current Relay: Directional over-current protection

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Directional Over-Current protection comprises Over-Current Relay and power directional relay- in a single relay casing. Directional relay does not measure the power but is arranged to respond to the direction of power flow.

How does Directional Relay works - Directional operation of relay is used where the selectivity can be achieved by directional relaying. The directional relay recognizes the direction in which fault occurs, relative to the location of the relay. It is set such that it actuates for faults occurring in one direction only. It does not act for faults occurring in the other direction.

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Create: Hrvoje Čočić
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Category: Education
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