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Answer Posted / renjith v.r
The following are to be used
1.Voltage restraint O/C relay
2. E/F relay
3. stand by E/F relay using CT in neutral earthing conductor
4. Under voltage ,over voltage relay
5. Differential potential relay
6.negative sequence relay
7.Vector surge relay
8.Reverse power and Reverse reactive power relay
9.rotor E/F relay
9.High vibration, oil temperature, Overspeeed and under speed alarm trip
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