1. Explain the advantages anddisadvantages of various communication channels used for pilotprotection?
2. Mention the advantages of singlepole tripping.
3. What is a bay control relay?
4. Explain pole discrepancyscheme.
5. Explain three pole trip andreclose for a transmission line with series compensation.
6. Explain the impact on powertransfer capability for various types of faults (SLG, LLG, LL and3-phase) with the help of P-? curves.
7. What is the difference betweendirect transfer trip and permissive transfer trip schemes?
8. Provide an example for phasecomparison scheme.
9. Mention the limitation of powerline carrier based communication.
10. Explain the disadvantages oftransfer trip schemes.
11. What is the significance of aguard signal in DCUB scheme?
12. Explain the impact of week infeedon POTT and DCUB schemes.
13. Explain how the fault resistancecoverage increases with communication based protection schemes.Make use of mho circles.
14. What is an adaptive reactanceelement? When is it used?
15. Explain the impact of mutualcoupling on ground distance relays.
16. Explain the criteria to setup theblinders for power swing and load encroachment. Draw appropriatediagrams on a complex plane.
