The relay best suited for phase fault relaying medium transmission lines
is
MHO relay
Reactance relay
Impedance
relay
Resistance
relay
Impedance
relay
Relay
and their applications :
•Reactance
relays- Short transmission lines
•Impedance
relay's - Medium transmission lines
•Mho
relays - Long transmission lines
Impedance
relays are used for protecting medium transmission line in which arcing ground
faults are infrequent.
Hence,
the correct option is (C).
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