Directional Over current relay|Protection of parallel lines|Directional over current protection

Directional over current relay or directional over current protection is very much essential for systems having parallel path, sources at both end and ring system. Non directional protection causes loss of the entire source in the event of a fault. Directional protection can prevent that and isolate the exact faulty circuit.
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Directional over current relay
Directional relay
Directional protection
over current protection with directional selectivity
application of directional relay
application of directional protection
where to use directional relay
how to use directional over current relay
directional protection application
ANSI code 67
67 relay
How to use 67 relay
Transmission line protection
radial feeder protection
ring main circuit protection

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