Answer / nishad

for the protection of generator we useing
1, under voltage/ overvoltage Relay
2Under/over frequency,
3, Reverse power relay,
4, Earth fault Relay
5, Differential Protection relay
6, over load protection
8, resticted earth fault relay ***(optional)
9,RTD's for bearing & winding >> protect from over heat
10,if it contain in clossed container provide differential
pressure relay,
These are the normal protection from Electrical side.

Answer / hitesh g. dobariya

The following are the main protection schemes adopted for
our generator.
1. Generator Differential Protection
2. Generator & Transformer Differential Protection
3. Loss of Field or Loss of Excitation Protection
4. Negative Sequence or Current Unbalance Protection
5. Over Fluxing or Over Excitation Protection
6. Over Current Protection
7. Stator Earth Fault Protection
8. Rotor Earth Fault Protection (64R)
9. Restricted Earth Fault Protection
10. Backup Impedance Protection
11. Low Forward Power Protection
12. Reverse Power Protection
13. Pole Slip Protection
14. Pole Discrepancy Protection
15. Local Breaker Back Protection
16. Bus Bar Protection
17. Over Frequency Protection
18. Under Frequency Protection
19. Over Voltage Protection

Answer / 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

Answer / vedprakash uppadhaya

reactors, thyristor contoroled rectifier

Answer / venkat

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