a) Compare the pros and cons of overhead lines and underground cables.
b) What is a bushing?
c) Which two purposes are served by the oil in a transformer? Elaborate.
d) What are the differences between CTs and VTs?
e) Why should the secondary of a CT never become open-circuited while it is energized?
f) Describe the concept of auto reclosing.
g) How does an isolator differ from a circuit breaker?
h) Describe the arc interruption processes in air blast, SF6, oil and vacuum circuit breakers.
i) What are the pros and cons of AC and DC transmission?