problem 1: How do you represent the characteristics of the given relays physically?
a) D. M. T relay.
b) I. D. M. T relay.
c) Very inverse relay.
problem 2: What are the problems faced when O.C relays are used for the protection of E.H.T. lines.
problem 3: Describe the constructional features of induction cup relay?
problem 4: What are amplitude and phase comparators?
problem 5: Describe the procedure for synthesizing directional relay by using phase comparators?
problem 6: What is three stepped distance protection and how it is implemented in long E.H.T. lines.
problem 7: What is internal and external fault and how is relay prevented from responding to external fault.
problem 8: What is percentage bias differential protection and how is it implemented to protect the generators from starter faults?
problem 9: Describe Merz-Prece protection scheme?
problem 10: How is the generator protected from loss of excitation?