Answer Posted / vishal

BUCKHOLTZ RELAYS(OIL COOLED T/F)---->INCIPIENT INTERNAL
FAULTS
PERCENTAGE DIFF PROTECTION----->FOR SHORT CIRCUITS(FOR
>1MVA T/F)
OVER CURRENT RELAY------------->SHORT CKT(FOR LOW RATING)

HAMONIC RESTRINT DIFF RELAY----->FOR PROT AGAINST MAL OPN
OF T/F

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