Important Questions of Power System Protection:

  1. Explain briefly the role of protection in a power system.
  2. Describe the essential features of a protective relay with reference to reliability, selectivity, speed of operation and discrimination.
  3. What are the principal types of faults in a power system? In what way is a fault harmful to the power system?
  4. Define the terms: burden, pickup, reset, operating time.
  5. Explain what is meant by primary protection and backup protection.

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