In Line protection which relay use

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Accepted Answer

Line protection relays are used for protecting transmission lines from faults.

Line protection relays are used to detect faults in transmission lines and isolate them from the system.
These relays can be of different types such as distance, differential, and directional relays.
Distance relays measure the impedance of the line and trip when the impedance falls below a certain threshold.
Differential relays compare the current entering and leaving the line and trip when there is a difference.
Directional relays trip only when the fault occurs in a specific direction.
Examples of line protection relays include SEL-311L, GE MiCOM P543, and Siemens 7SD610.

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