WHY DIRECTIONAL OVERCURRENT RELAYS/WHY DIRECTIONAL RELAYS USED FOR COORDINATION PURPOSE
#DIRECTIONAL OVERCURRENT RELAYS ARE USED IN INTERCONNECTED TRANSMISSION NETWORK. FOR RADIALLY FEEDED SUBSTATION BUT HAVE PARALLEL CIRCUITS DIRECTIONAL RELAYS ARE MUST AT RECEIVING END. WHY DIRECTIONAL OVERCURRENT RELAY IS USED IN A PARALLEL FEEDER IS EXPLAINED HERE. FOR COORDINATION OF RELAY SETTING TO ISOLATE FAULTY SECTION OF POWER NETWORK DIRECTIONAL RELAYS ARE USED.