Answer / k.prakashchandra

In other words ,directional relay is employed for
tranmission lines when there are two or more parallel
feeders ,so that the heathy feeder does not trip due to the
fault in another feeder.It is also used when the
tranformers are in parallel operation to prevent reverse
power ,when the secondaries are in prallel

I have a 33 KV sub stn with two mother transformers 33/11 KV of capacity 3150 and 1600 KVA respectively. The total connected load 16809 KVA(11/0.433KV).how i calculate the max current & how i decided the CMD.

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coil is consist of

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what is the power factor

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