POWER SYSTEM ANALYSIS QUESTIONS

7. What is the difference between a circuit breaker and an isolator?

8. What happens if a circuit breaker is switched before an isolator, while energizing a feeder?

9. How is the total load current distributed among the two incoming feeders if both of them are connected to the same bus and feeding a load?

10. How is the total load current distributed among the two-incoming feeder for all the connected load?

11. What are the advantages of changing busbars without interruption?

12. Presume you are able to switch ON an isolator Q12 and switch off an isolator Q11, even though the circuit is energized; How does this work without damaging the isolator and without any alarm?

NOTE:

All answers must be typed out in a computer.