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A distance relay is connected with the area of operation in the R-X plane that is...

A distance relay is connected with the area of operation in the R-X plane that is common to
i. a Mho relay of radius 15 Ω and,
ii. an off-set Mho relay with center (5Ω, 7Ω) and radius 9 Ω.
a) Determine the length of the transmission line whose impedance angle is 750, that would be covered by the combined relay.
b) What is the resistance of a fault that can be detected, if it occurs at a point along the line that is
i. distant 9 Ω from the location of the relay
ii. distant 2 Ω from the location of the relay

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