State any four relays used for catenary protection. State function of each relay.

State any four relays used for catenary protection. State function of each relay.
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1 Answer

Answer :

Relays Used for Catenary Protection: 1. MHO relay: Wrong coupling protection. 2. MHO relay: Over current protection at farthest point. 3. Over current relay: Over current protection against faults near substation 4. Under voltage relay: Protection against faults far away from substation. 

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