In
differential protection of bus-bars the CT ratio
Based on total expected fault current
Equal
and based on primary current of lowest current carrying feeder
Based
on their respective feeder current
Equal
and based on primary current of highest current carrying feeder
Equal
and based on primary current of highest current carrying feeder
In
differential protection of busbar the CT ratio equal and based on primary
current of highest current carrying feeder. To protect busbar line and feeder
from electrical fault the same protection systems are often used to protect
which is often used for alternator and transformer.
Hence,
the correct option is (D).
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