1) a) Explain the functioning of negative sequence relays with suitable diagram.
b) Write a brief note on static relays with a neat block diagram.
2) Describe the construction and working of the directional induction type over current relay with the help of a neat diagram.
3) Explain the balanced earth fault protection scheme of generators with suitable diagram.
4) a) Explain about the Non-Directional Time graded current graded and Time/current Graded protection for feeders.
b) Discuss what is restricted earth fault protection?
5) a) Provide a brief account of the several arc extinction process in ac circuits.
b) Write down the technical note on HRC fuses in brief.
6) Discuss the phenomenon of the resistance switching.
7) Explain the constructional details of the Vacuum CB and describe its principle of operation and working.
8) Explain the construction and process of arc extinction in SF6 Breaker with neat diagram.
9) Discuss about the µP based protective systems with required diagrams.
10) Develop the program flowchart for the directional relay.